Press n or j to go to the next uncovered block, b, p or k for the previous block.
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5x 5x 5x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 7x 7x 7x 7x 7x 7x 1x 6x 6x 6x 7x 7x 7x 7x 7x 3x 7x 3x 7x 1x 1x 1x 7x 4x 4x 7x 186x 186x 186x 48x 48x 138x 138x 2x 138x 138x 138x 138x 138x 136x 136x 1x 138x 1x 1x 1x 1x 2x 2x 2x 2x 2x 1x 2x 2x 2x 2x 2x 1x 2x 1x 1x 1x 1x 1x 1x 1x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 6x 4x 4x 2x 2x 2x 7x 15x 15x 15x 15x 15x 15x 15x 10x 15x 15x 15x 10x 15x 1x 15x 15x 15x 15x 15x 15x 15x 3x 3x 3x 3x 2x 15x 12x 15x 12x 15x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 2x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 1x 1x 26x 26x 26x 26x 26x 26x 26x 26x 1x 25x 25x 25x 26x 26x 26x 26x 26x 9x 26x 6x 6x 26x 1x 1x 1x 26x 20x 26x 26x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 5x 5x 2x 1x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 2x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 2x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 2x 2x 2x 2x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 11321x 11321x 11321x 11321x 1x 1x 11669x 11669x 11669x 11669x 175x 11494x 11494x 11494x 11494x 6887x 6887x 6887x 11494x 11494x 11316x 178x 11494x 11494x 8099x 8099x 67x 67x 67x 67x 7x 7x 4x 3x 7x 67x 10x 57x 11494x 6887x 6887x 3x 3x 3x 3x 3x 3x 1x 11568x 11568x 11568x 11568x 165x 11403x 1x 1x 1x 11682x 11682x 11682x 6930x 6930x 4752x 4752x 11682x 11682x 11682x 11682x 11682x 11682x 11682x 11682x 11682x 11682x 11682x 11682x 169x 11513x 186x 186x 11327x 11321x 11321x 11682x 11668x 11668x 11682x 1x 72x 1x 743x 743x 743x | import Cartesian2 from "../Core/Cartesian2.js";
import Cartesian3 from "../Core/Cartesian3.js";
import Cartesian4 from "../Core/Cartesian4.js";
import Cartographic from "../Core/Cartographic.js";
import defined from "../Core/defined.js";
import destroyObject from "../Core/destroyObject.js";
import DeveloperError from "../Core/DeveloperError.js";
import Ellipsoid from "../Core/Ellipsoid.js";
import HeadingPitchRoll from "../Core/HeadingPitchRoll.js";
import IntersectionTests from "../Core/IntersectionTests.js";
import KeyboardEventModifier from "../Core/KeyboardEventModifier.js";
import CesiumMath from "../Core/Math.js";
import Matrix3 from "../Core/Matrix3.js";
import Matrix4 from "../Core/Matrix4.js";
import OrthographicFrustum from "../Core/OrthographicFrustum.js";
import Plane from "../Core/Plane.js";
import Quaternion from "../Core/Quaternion.js";
import Ray from "../Core/Ray.js";
import VerticalExaggeration from "../Core/VerticalExaggeration.js";
import Transforms from "../Core/Transforms.js";
import CameraEventAggregator from "./CameraEventAggregator.js";
import CameraEventType from "./CameraEventType.js";
import MapMode2D from "./MapMode2D.js";
import SceneMode from "./SceneMode.js";
import SceneTransforms from "./SceneTransforms.js";
import TweenCollection from "./TweenCollection.js";
/**
* Modifies the camera position and orientation based on mouse input to a canvas.
* @alias ScreenSpaceCameraController
* @constructor
*
* @param {Scene} scene The scene.
*/
function ScreenSpaceCameraController(scene) {
//>>includeStart('debug', pragmas.debug);
if (!defined(scene)) {
throw new DeveloperError("scene is required.");
}
//>>includeEnd('debug');
/**
* If true, inputs are allowed conditionally with the flags enableTranslate, enableZoom,
* enableRotate, enableTilt, and enableLook. If false, all inputs are disabled.
*
* NOTE: This setting is for temporary use cases, such as camera flights and
* drag-selection of regions (see Picking demo). It is typically set to false at the
* start of such events, and set true on completion. To keep inputs disabled
* past the end of camera flights, you must use the other booleans (enableTranslate,
* enableZoom, enableRotate, enableTilt, and enableLook).
* @type {boolean}
* @default true
*/
this.enableInputs = true;
/**
* If true, allows the user to pan around the map. If false, the camera stays locked at the current position.
* This flag only applies in 2D and Columbus view modes.
* @type {boolean}
* @default true
*/
this.enableTranslate = true;
/**
* If true, allows the user to zoom in and out. If false, the camera is locked to the current distance from the ellipsoid.
* @type {boolean}
* @default true
*/
this.enableZoom = true;
/**
* If true, allows the user to rotate the world which translates the user's position.
* This flag only applies in 2D and 3D.
* @type {boolean}
* @default true
*/
this.enableRotate = true;
/**
* If true, allows the user to tilt the camera. If false, the camera is locked to the current heading.
* This flag only applies in 3D and Columbus view.
* @type {boolean}
* @default true
*/
this.enableTilt = true;
/**
* If true, allows the user to use free-look. If false, the camera view direction can only be changed through translating
* or rotating. This flag only applies in 3D and Columbus view modes.
* @type {boolean}
* @default true
*/
this.enableLook = true;
/**
* A parameter in the range <code>[0, 1)</code> used to determine how long
* the camera will continue to spin because of inertia.
* With value of zero, the camera will have no inertia.
* @type {number}
* @default 0.9
*/
this.inertiaSpin = 0.9;
/**
* A parameter in the range <code>[0, 1)</code> used to determine how long
* the camera will continue to translate because of inertia.
* With value of zero, the camera will have no inertia.
* @type {number}
* @default 0.9
*/
this.inertiaTranslate = 0.9;
/**
* A parameter in the range <code>[0, 1)</code> used to determine how long
* the camera will continue to zoom because of inertia.
* With value of zero, the camera will have no inertia.
* @type {number}
* @default 0.8
*/
this.inertiaZoom = 0.8;
/**
* A parameter in the range <code>[0, 1)</code> used to limit the range
* of various user inputs to a percentage of the window width/height per animation frame.
* This helps keep the camera under control in low-frame-rate situations.
* @type {number}
* @default 0.1
*/
this.maximumMovementRatio = 0.1;
/**
* Sets the duration, in seconds, of the bounce back animations in 2D and Columbus view.
* @type {number}
* @default 3.0
*/
this.bounceAnimationTime = 3.0;
/**
* The minimum magnitude, in meters, of the camera position when zooming. Defaults to 1.0.
* @type {number}
* @default 1.0
*/
this.minimumZoomDistance = 1.0;
/**
* The maximum magnitude, in meters, of the camera position when zooming. Defaults to positive infinity.
* @type {number}
* @default {@link Number.POSITIVE_INFINITY}
*/
this.maximumZoomDistance = Number.POSITIVE_INFINITY;
/**
* A multiplier for the speed at which the camera will zoom.
* @type {number}
* @default 5.0
*/
this.zoomFactor = 5.0;
/**
* The input that allows the user to pan around the map. This only applies in 2D and Columbus view modes.
* <p>
* The type can be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
* or an array of any of the preceding.
* </p>
* @type {CameraEventType|Array|undefined}
* @default {@link CameraEventType.LEFT_DRAG}
*/
this.translateEventTypes = CameraEventType.LEFT_DRAG;
/**
* The input that allows the user to zoom in/out.
* <p>
* The type can be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
* or an array of any of the preceding.
* </p>
* @type {CameraEventType|Array|undefined}
* @default [{@link CameraEventType.RIGHT_DRAG}, {@link CameraEventType.WHEEL}, {@link CameraEventType.PINCH}]
*/
this.zoomEventTypes = [
CameraEventType.RIGHT_DRAG,
CameraEventType.WHEEL,
CameraEventType.PINCH,
];
/**
* The input that allows the user to rotate around the globe or another object. This only applies in 3D and Columbus view modes.
* <p>
* The type can be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
* or an array of any of the preceding.
* </p>
* @type {CameraEventType|Array|undefined}
* @default {@link CameraEventType.LEFT_DRAG}
*/
this.rotateEventTypes = CameraEventType.LEFT_DRAG;
/**
* The input that allows the user to tilt in 3D and Columbus view or twist in 2D.
* <p>
* The type can be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
* or an array of any of the preceding.
* </p>
* @type {CameraEventType|Array|undefined}
* @default [{@link CameraEventType.MIDDLE_DRAG}, {@link CameraEventType.PINCH}, {
* eventType : {@link CameraEventType.LEFT_DRAG},
* modifier : {@link KeyboardEventModifier.CTRL}
* }, {
* eventType : {@link CameraEventType.RIGHT_DRAG},
* modifier : {@link KeyboardEventModifier.CTRL}
* }]
*/
this.tiltEventTypes = [
CameraEventType.MIDDLE_DRAG,
CameraEventType.PINCH,
{
eventType: CameraEventType.LEFT_DRAG,
modifier: KeyboardEventModifier.CTRL,
},
{
eventType: CameraEventType.RIGHT_DRAG,
modifier: KeyboardEventModifier.CTRL,
},
];
/**
* The input that allows the user to change the direction the camera is viewing. This only applies in 3D and Columbus view modes.
* <p>
* The type can be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
* or an array of any of the preceding.
* </p>
* @type {CameraEventType|Array|undefined}
* @default { eventType : {@link CameraEventType.LEFT_DRAG}, modifier : {@link KeyboardEventModifier.SHIFT} }
*/
this.lookEventTypes = {
eventType: CameraEventType.LEFT_DRAG,
modifier: KeyboardEventModifier.SHIFT,
};
const ellipsoid = scene.ellipsoid ?? Ellipsoid.default;
/**
* The minimum height the camera must be before picking the terrain or scene content instead of the ellipsoid. Defaults to scene.ellipsoid.minimumRadius * 0.025 when another ellipsoid than WGS84 is used.
* @type {number}
* @default 150000.0 or scene.ellipsoid.minimumRadius * 0.025
*/
this.minimumPickingTerrainHeight = Ellipsoid.WGS84.equals(ellipsoid)
? 150000.0
: ellipsoid.minimumRadius * 0.025;
this._minimumPickingTerrainHeight = this.minimumPickingTerrainHeight;
/**
* The minimum distance the camera must be before testing for collision with terrain when zoom with inertia. Default to scene.ellipsoid.minimumRadius * 0.00063 when another ellipsoid than WGS84 is used.
* @type {number}
* @default 4000.0 or scene.ellipsoid.minimumRadius * 0.00063
*/
this.minimumPickingTerrainDistanceWithInertia = Ellipsoid.WGS84.equals(
ellipsoid,
)
? 4000.0
: ellipsoid.minimumRadius * 0.00063;
/**
* The minimum height the camera must be before testing for collision with terrain. Default to scene.ellipsoid.minimumRadius * 0.0025 when another ellipsoid than WGS84 is used.
* @type {number}
* @default 15000.0 or scene.ellipsoid.minimumRadius * 0.0025.
*/
this.minimumCollisionTerrainHeight = Ellipsoid.WGS84.equals(ellipsoid)
? 15000.0
: ellipsoid.minimumRadius * 0.0025;
this._minimumCollisionTerrainHeight = this.minimumCollisionTerrainHeight;
/**
* The minimum height the camera must be before switching from rotating a track ball to
* free look when clicks originate on the sky or in space. Defaults to ellipsoid.minimumRadius * 1.175 when another ellipsoid than WGS84 is used.
* @type {number}
* @default 7500000.0 or scene.ellipsoid.minimumRadius * 1.175
*/
this.minimumTrackBallHeight = Ellipsoid.WGS84.equals(ellipsoid)
? 7500000.0
: ellipsoid.minimumRadius * 1.175;
this._minimumTrackBallHeight = this.minimumTrackBallHeight;
/**
* When disabled, the values of <code>maximumZoomDistance</code> and <code>minimumZoomDistance</code> are ignored.
* Also used in conjunction with {@link Cesium3DTileset#enableCollision} to prevent the camera from moving through or below a 3D Tileset surface.
* This may also affect clamping behavior when using {@link HeightReference.CLAMP_TO_GROUND} on 3D Tiles.
* @type {boolean}
* @default true
*/
this.enableCollisionDetection = true;
/**
* The angle, relative to the ellipsoid normal, restricting the maximum amount that the user can tilt the camera. If <code>undefined</code>, the angle of the camera tilt is unrestricted.
* @type {number|undefined}
* @default undefined
*
* @example
* // Prevent the camera from tilting below the ellipsoid surface
* viewer.scene.screenSpaceCameraController.maximumTiltAngle = Math.PI / 2.0;
*/
this.maximumTiltAngle = undefined;
this._scene = scene;
this._globe = undefined;
this._ellipsoid = ellipsoid;
this._lastGlobeHeight = 0.0;
this._aggregator = new CameraEventAggregator(scene.canvas);
this._lastInertiaSpinMovement = undefined;
this._lastInertiaZoomMovement = undefined;
this._lastInertiaTranslateMovement = undefined;
this._lastInertiaTiltMovement = undefined;
// Zoom disables tilt, spin, and translate inertia
// Tilt disables spin and translate inertia
this._inertiaDisablers = {
_lastInertiaZoomMovement: [
"_lastInertiaSpinMovement",
"_lastInertiaTranslateMovement",
"_lastInertiaTiltMovement",
],
_lastInertiaTiltMovement: [
"_lastInertiaSpinMovement",
"_lastInertiaTranslateMovement",
],
};
this._tweens = new TweenCollection();
this._tween = undefined;
this._horizontalRotationAxis = undefined;
this._tiltCenterMousePosition = new Cartesian2(-1.0, -1.0);
this._tiltCenter = new Cartesian3();
this._rotateMousePosition = new Cartesian2(-1.0, -1.0);
this._rotateStartPosition = new Cartesian3();
this._strafeStartPosition = new Cartesian3();
this._strafeMousePosition = new Cartesian2();
this._strafeEndMousePosition = new Cartesian2();
this._zoomMouseStart = new Cartesian2(-1.0, -1.0);
this._zoomWorldPosition = new Cartesian3();
this._useZoomWorldPosition = false;
this._panLastMousePosition = new Cartesian2();
this._panLastWorldPosition = new Cartesian3();
this._tiltCVOffMap = false;
this._looking = false;
this._rotating = false;
this._strafing = false;
this._zoomingOnVector = false;
this._zoomingUnderground = false;
this._rotatingZoom = false;
this._adjustedHeightForTerrain = false;
this._cameraUnderground = false;
const projection = scene.mapProjection;
this._maxCoord = projection.project(
new Cartographic(Math.PI, CesiumMath.PI_OVER_TWO),
);
// Constants, Make any of these public?
this._rotateFactor = undefined;
this._rotateRateRangeAdjustment = undefined;
this._maximumRotateRate = 1.77;
this._minimumRotateRate = 1.0 / 5000.0;
this._minimumZoomRate = 20.0;
this._maximumZoomRate = 5906376272000.0; // distance from the Sun to Pluto in meters.
this._minimumUndergroundPickDistance = 2000.0;
this._maximumUndergroundPickDistance = 10000.0;
}
function decay(time, coefficient) {
Iif (time < 0) {
return 0.0;
}
const tau = (1.0 - coefficient) * 25.0;
return Math.exp(-tau * time);
}
function sameMousePosition(movement) {
return Cartesian2.equalsEpsilon(
movement.startPosition,
movement.endPosition,
CesiumMath.EPSILON14,
);
}
// If the time between mouse down and mouse up is not between
// these thresholds, the camera will not move with inertia.
// This value is probably dependent on the browser and/or the
// hardware. Should be investigated further.
const inertiaMaxClickTimeThreshold = 0.4;
function maintainInertia(
aggregator,
type,
modifier,
decayCoef,
action,
object,
lastMovementName,
) {
let movementState = object[lastMovementName];
if (!defined(movementState)) {
movementState = object[lastMovementName] = {
startPosition: new Cartesian2(),
endPosition: new Cartesian2(),
motion: new Cartesian2(),
inertiaEnabled: true,
};
}
const ts = aggregator.getButtonPressTime(type, modifier);
const tr = aggregator.getButtonReleaseTime(type, modifier);
const threshold = ts && tr && (tr.getTime() - ts.getTime()) / 1000.0;
const now = new Date();
const fromNow = tr && (now.getTime() - tr.getTime()) / 1000.0;
if (ts && tr && threshold < inertiaMaxClickTimeThreshold) {
const d = decay(fromNow, decayCoef);
const lastMovement = aggregator.getLastMovement(type, modifier);
Eif (
!defined(lastMovement) ||
sameMousePosition(lastMovement) ||
!movementState.inertiaEnabled
) {
return;
}
movementState.motion.x =
(lastMovement.endPosition.x - lastMovement.startPosition.x) * 0.5;
movementState.motion.y =
(lastMovement.endPosition.y - lastMovement.startPosition.y) * 0.5;
movementState.startPosition = Cartesian2.clone(
lastMovement.startPosition,
movementState.startPosition,
);
movementState.endPosition = Cartesian2.multiplyByScalar(
movementState.motion,
d,
movementState.endPosition,
);
movementState.endPosition = Cartesian2.add(
movementState.startPosition,
movementState.endPosition,
movementState.endPosition,
);
// If value from the decreasing exponential function is close to zero,
// the end coordinates may be NaN.
if (
isNaN(movementState.endPosition.x) ||
isNaN(movementState.endPosition.y) ||
Cartesian2.distance(
movementState.startPosition,
movementState.endPosition,
) < 0.5
) {
return;
}
if (!aggregator.isButtonDown(type, modifier)) {
const startPosition = aggregator.getStartMousePosition(type, modifier);
action(object, startPosition, movementState);
}
}
}
function activateInertia(controller, inertiaStateName) {
if (defined(inertiaStateName)) {
// Re-enable inertia if it was disabled
let movementState = controller[inertiaStateName];
if (defined(movementState)) {
movementState.inertiaEnabled = true;
}
// Disable inertia on other movements
const inertiasToDisable = controller._inertiaDisablers[inertiaStateName];
if (defined(inertiasToDisable)) {
const length = inertiasToDisable.length;
for (let i = 0; i < length; ++i) {
movementState = controller[inertiasToDisable[i]];
if (defined(movementState)) {
movementState.inertiaEnabled = false;
}
}
}
}
}
const scratchEventTypeArray = [];
function reactToInput(
controller,
enabled,
eventTypes,
action,
inertiaConstant,
inertiaStateName,
) {
if (!defined(eventTypes)) {
return;
}
const aggregator = controller._aggregator;
if (!Array.isArray(eventTypes)) {
scratchEventTypeArray[0] = eventTypes;
eventTypes = scratchEventTypeArray;
}
const length = eventTypes.length;
for (let i = 0; i < length; ++i) {
const eventType = eventTypes[i];
const type = defined(eventType.eventType) ? eventType.eventType : eventType;
const modifier = eventType.modifier;
const movement =
aggregator.isMoving(type, modifier) &&
aggregator.getMovement(type, modifier);
const startPosition = aggregator.getStartMousePosition(type, modifier);
if (controller.enableInputs && enabled) {
if (movement) {
action(controller, startPosition, movement);
activateInertia(controller, inertiaStateName);
} else if (inertiaConstant < 1.0) {
maintainInertia(
aggregator,
type,
modifier,
inertiaConstant,
action,
controller,
inertiaStateName,
);
}
}
}
}
const scratchZoomPickRay = new Ray();
const scratchPickCartesian = new Cartesian3();
const scratchZoomOffset = new Cartesian2();
const scratchZoomDirection = new Cartesian3();
const scratchCenterPixel = new Cartesian2();
const scratchCenterPosition = new Cartesian3();
const scratchPositionNormal = new Cartesian3();
const scratchPickNormal = new Cartesian3();
const scratchZoomAxis = new Cartesian3();
const scratchCameraPositionNormal = new Cartesian3();
// Scratch variables used in zooming algorithm
const scratchTargetNormal = new Cartesian3();
const scratchCameraPosition = new Cartesian3();
const scratchCameraUpNormal = new Cartesian3();
const scratchCameraRightNormal = new Cartesian3();
const scratchForwardNormal = new Cartesian3();
const scratchPositionToTarget = new Cartesian3();
const scratchPositionToTargetNormal = new Cartesian3();
const scratchPan = new Cartesian3();
const scratchCenterMovement = new Cartesian3();
const scratchCenter = new Cartesian3();
const scratchCartesian = new Cartesian3();
const scratchCartesianTwo = new Cartesian3();
const scratchCartesianThree = new Cartesian3();
const scratchZoomViewOptions = {
orientation: new HeadingPitchRoll(),
};
function handleZoom(
object,
startPosition,
movement,
zoomFactor,
distanceMeasure,
unitPositionDotDirection,
) {
let percentage = 1.0;
if (defined(unitPositionDotDirection)) {
percentage = CesiumMath.clamp(
Math.abs(unitPositionDotDirection),
0.25,
1.0,
);
}
const diff = movement.endPosition.y - movement.startPosition.y;
// distanceMeasure should be the height above the ellipsoid.
// When approaching the surface, the zoomRate slows and stops minimumZoomDistance above it.
const approachingSurface = diff > 0;
const minHeight = approachingSurface
? object.minimumZoomDistance * percentage
: 0;
const maxHeight = object.maximumZoomDistance;
const minDistance = distanceMeasure - minHeight;
let zoomRate = zoomFactor * minDistance;
zoomRate = CesiumMath.clamp(
zoomRate,
object._minimumZoomRate,
object._maximumZoomRate,
);
let rangeWindowRatio = diff / object._scene.canvas.clientHeight;
rangeWindowRatio = Math.min(rangeWindowRatio, object.maximumMovementRatio);
let distance = zoomRate * rangeWindowRatio;
if (
object.enableCollisionDetection ||
object.minimumZoomDistance === 0.0 ||
!defined(object._globe) // look-at mode
) {
Iif (distance > 0.0 && Math.abs(distanceMeasure - minHeight) < 1.0) {
return;
}
Iif (distance < 0.0 && Math.abs(distanceMeasure - maxHeight) < 1.0) {
return;
}
if (distanceMeasure - distance < minHeight) {
distance = distanceMeasure - minHeight - 1.0;
} else if (distanceMeasure - distance > maxHeight) {
distance = distanceMeasure - maxHeight;
}
}
const scene = object._scene;
const camera = scene.camera;
const mode = scene.mode;
const orientation = scratchZoomViewOptions.orientation;
orientation.heading = camera.heading;
orientation.pitch = camera.pitch;
orientation.roll = camera.roll;
const sameStartPosition =
movement.inertiaEnabled ??
Cartesian2.equals(startPosition, object._zoomMouseStart);
let zoomingOnVector = object._zoomingOnVector;
let rotatingZoom = object._rotatingZoom;
let pickedPosition;
if (!sameStartPosition) {
object._zoomMouseStart = Cartesian2.clone(
startPosition,
object._zoomMouseStart,
);
// When camera transform is set, such as tracking an entity, object._globe will be undefined, and no position should be picked
Iif (defined(object._globe) && mode === SceneMode.SCENE2D) {
pickedPosition = camera.getPickRay(
startPosition,
scratchZoomPickRay,
).origin;
pickedPosition = Cartesian3.fromElements(
pickedPosition.y,
pickedPosition.z,
pickedPosition.x,
);
} else if (defined(object._globe)) {
pickedPosition = pickPosition(
object,
startPosition,
scratchPickCartesian,
);
}
if (defined(pickedPosition)) {
object._useZoomWorldPosition = true;
object._zoomWorldPosition = Cartesian3.clone(
pickedPosition,
object._zoomWorldPosition,
);
} else {
object._useZoomWorldPosition = false;
}
zoomingOnVector = object._zoomingOnVector = false;
rotatingZoom = object._rotatingZoom = false;
object._zoomingUnderground = object._cameraUnderground;
}
if (!object._useZoomWorldPosition) {
camera.zoomIn(distance);
return;
}
let zoomOnVector = mode === SceneMode.COLUMBUS_VIEW;
Eif (camera.positionCartographic.height < 2000000) {
rotatingZoom = true;
}
Eif (!sameStartPosition || rotatingZoom) {
Iif (mode === SceneMode.SCENE2D) {
const worldPosition = object._zoomWorldPosition;
const endPosition = camera.position;
if (
!Cartesian3.equals(worldPosition, endPosition) &&
camera.positionCartographic.height < object._maxCoord.x * 2.0
) {
const savedX = camera.position.x;
const direction = Cartesian3.subtract(
worldPosition,
endPosition,
scratchZoomDirection,
);
Cartesian3.normalize(direction, direction);
const d =
(Cartesian3.distance(worldPosition, endPosition) * distance) /
(camera.getMagnitude() * 0.5);
camera.move(direction, d * 0.5);
if (
(camera.position.x < 0.0 && savedX > 0.0) ||
(camera.position.x > 0.0 && savedX < 0.0)
) {
pickedPosition = camera.getPickRay(
startPosition,
scratchZoomPickRay,
).origin;
pickedPosition = Cartesian3.fromElements(
pickedPosition.y,
pickedPosition.z,
pickedPosition.x,
);
object._zoomWorldPosition = Cartesian3.clone(
pickedPosition,
object._zoomWorldPosition,
);
}
}
} else if (mode === SceneMode.SCENE3D) {
const cameraPositionNormal = Cartesian3.normalize(
camera.position,
scratchCameraPositionNormal,
);
if (
object._cameraUnderground ||
object._zoomingUnderground ||
(camera.positionCartographic.height < 3000.0 &&
Math.abs(Cartesian3.dot(camera.direction, cameraPositionNormal)) <
0.6)
) {
zoomOnVector = true;
} else {
const canvas = scene.canvas;
const centerPixel = scratchCenterPixel;
centerPixel.x = canvas.clientWidth / 2;
centerPixel.y = canvas.clientHeight / 2;
const centerPosition = pickPosition(
object,
centerPixel,
scratchCenterPosition,
);
// If centerPosition is not defined, it means the globe does not cover the center position of screen
Iif (!defined(centerPosition)) {
zoomOnVector = true;
} else if (camera.positionCartographic.height < 1000000) {
// The math in the else block assumes the camera
// points toward the earth surface, so we check it here.
// Theoretically, we should check for 90 degree, but it doesn't behave well when parallel
// to the earth surface
Iif (Cartesian3.dot(camera.direction, cameraPositionNormal) >= -0.5) {
zoomOnVector = true;
} else {
const cameraPosition = scratchCameraPosition;
Cartesian3.clone(camera.position, cameraPosition);
const target = object._zoomWorldPosition;
let targetNormal = scratchTargetNormal;
targetNormal = Cartesian3.normalize(target, targetNormal);
Iif (Cartesian3.dot(targetNormal, cameraPositionNormal) < 0.0) {
return;
}
const center = scratchCenter;
const forward = scratchForwardNormal;
Cartesian3.clone(camera.direction, forward);
Cartesian3.add(
cameraPosition,
Cartesian3.multiplyByScalar(forward, 1000, scratchCartesian),
center,
);
const positionToTarget = scratchPositionToTarget;
const positionToTargetNormal = scratchPositionToTargetNormal;
Cartesian3.subtract(target, cameraPosition, positionToTarget);
Cartesian3.normalize(positionToTarget, positionToTargetNormal);
const alphaDot = Cartesian3.dot(
cameraPositionNormal,
positionToTargetNormal,
);
Iif (alphaDot >= 0.0) {
// We zoomed past the target, and this zoom is not valid anymore.
// This line causes the next zoom movement to pick a new starting point.
object._zoomMouseStart.x = -1;
return;
}
const alpha = Math.acos(-alphaDot);
const cameraDistance = Cartesian3.magnitude(cameraPosition);
const targetDistance = Cartesian3.magnitude(target);
const remainingDistance = cameraDistance - distance;
const positionToTargetDistance =
Cartesian3.magnitude(positionToTarget);
const gamma = Math.asin(
CesiumMath.clamp(
(positionToTargetDistance / targetDistance) * Math.sin(alpha),
-1.0,
1.0,
),
);
const delta = Math.asin(
CesiumMath.clamp(
(remainingDistance / targetDistance) * Math.sin(alpha),
-1.0,
1.0,
),
);
const beta = gamma - delta + alpha;
const up = scratchCameraUpNormal;
Cartesian3.normalize(cameraPosition, up);
let right = scratchCameraRightNormal;
right = Cartesian3.cross(positionToTargetNormal, up, right);
right = Cartesian3.normalize(right, right);
Cartesian3.normalize(
Cartesian3.cross(up, right, scratchCartesian),
forward,
);
// Calculate new position to move to
Cartesian3.multiplyByScalar(
Cartesian3.normalize(center, scratchCartesian),
Cartesian3.magnitude(center) - distance,
center,
);
Cartesian3.normalize(cameraPosition, cameraPosition);
Cartesian3.multiplyByScalar(
cameraPosition,
remainingDistance,
cameraPosition,
);
// Pan
const pMid = scratchPan;
Cartesian3.multiplyByScalar(
Cartesian3.add(
Cartesian3.multiplyByScalar(
up,
Math.cos(beta) - 1,
scratchCartesianTwo,
),
Cartesian3.multiplyByScalar(
forward,
Math.sin(beta),
scratchCartesianThree,
),
scratchCartesian,
),
remainingDistance,
pMid,
);
Cartesian3.add(cameraPosition, pMid, cameraPosition);
Cartesian3.normalize(center, up);
Cartesian3.normalize(
Cartesian3.cross(up, right, scratchCartesian),
forward,
);
const cMid = scratchCenterMovement;
Cartesian3.multiplyByScalar(
Cartesian3.add(
Cartesian3.multiplyByScalar(
up,
Math.cos(beta) - 1,
scratchCartesianTwo,
),
Cartesian3.multiplyByScalar(
forward,
Math.sin(beta),
scratchCartesianThree,
),
scratchCartesian,
),
Cartesian3.magnitude(center),
cMid,
);
Cartesian3.add(center, cMid, center);
// Update camera
// Set new position
Cartesian3.clone(cameraPosition, camera.position);
// Set new direction
Cartesian3.normalize(
Cartesian3.subtract(center, cameraPosition, scratchCartesian),
camera.direction,
);
Cartesian3.clone(camera.direction, camera.direction);
// Set new right & up vectors
Cartesian3.cross(camera.direction, camera.up, camera.right);
Cartesian3.cross(camera.right, camera.direction, camera.up);
camera.setView(scratchZoomViewOptions);
return;
}
} else E{
const positionNormal = Cartesian3.normalize(
centerPosition,
scratchPositionNormal,
);
const pickedNormal = Cartesian3.normalize(
object._zoomWorldPosition,
scratchPickNormal,
);
const dotProduct = Cartesian3.dot(pickedNormal, positionNormal);
if (dotProduct > 0.0 && dotProduct < 1.0) {
const angle = CesiumMath.acosClamped(dotProduct);
const axis = Cartesian3.cross(
pickedNormal,
positionNormal,
scratchZoomAxis,
);
const denom =
Math.abs(angle) > CesiumMath.toRadians(20.0)
? camera.positionCartographic.height * 0.75
: camera.positionCartographic.height - distance;
const scalar = distance / denom;
camera.rotate(axis, angle * scalar);
}
}
}
}
object._rotatingZoom = !zoomOnVector;
}
if ((!sameStartPosition && zoomOnVector) || zoomingOnVector) {
let ray;
const zoomMouseStart = SceneTransforms.worldToWindowCoordinates(
scene,
object._zoomWorldPosition,
scratchZoomOffset,
);
if (
mode !== SceneMode.COLUMBUS_VIEW &&
Cartesian2.equals(startPosition, object._zoomMouseStart) &&
defined(zoomMouseStart)
) {
ray = camera.getPickRay(zoomMouseStart, scratchZoomPickRay);
} else {
ray = camera.getPickRay(startPosition, scratchZoomPickRay);
}
const rayDirection = ray.direction;
if (mode === SceneMode.COLUMBUS_VIEW || mode === SceneMode.SCENE2D) {
Cartesian3.fromElements(
rayDirection.y,
rayDirection.z,
rayDirection.x,
rayDirection,
);
}
camera.move(rayDirection, distance);
object._zoomingOnVector = true;
} else E{
camera.zoomIn(distance);
}
if (!object._cameraUnderground) {
camera.setView(scratchZoomViewOptions);
}
}
const translate2DStart = new Ray();
const translate2DEnd = new Ray();
const scratchTranslateP0 = new Cartesian3();
function translate2D(controller, startPosition, movement) {
const scene = controller._scene;
const camera = scene.camera;
let start = camera.getPickRay(
movement.startPosition,
translate2DStart,
).origin;
let end = camera.getPickRay(movement.endPosition, translate2DEnd).origin;
start = Cartesian3.fromElements(start.y, start.z, start.x, start);
end = Cartesian3.fromElements(end.y, end.z, end.x, end);
const direction = Cartesian3.subtract(start, end, scratchTranslateP0);
const distance = Cartesian3.magnitude(direction);
Eif (distance > 0.0) {
Cartesian3.normalize(direction, direction);
camera.move(direction, distance);
}
}
function zoom2D(controller, startPosition, movement) {
Iif (defined(movement.distance)) {
movement = movement.distance;
}
const scene = controller._scene;
const camera = scene.camera;
handleZoom(
controller,
startPosition,
movement,
controller.zoomFactor,
camera.getMagnitude(),
);
}
const twist2DStart = new Cartesian2();
const twist2DEnd = new Cartesian2();
function twist2D(controller, startPosition, movement) {
Iif (defined(movement.angleAndHeight)) {
singleAxisTwist2D(controller, startPosition, movement.angleAndHeight);
return;
}
const scene = controller._scene;
const camera = scene.camera;
const canvas = scene.canvas;
const width = canvas.clientWidth;
const height = canvas.clientHeight;
let start = twist2DStart;
start.x = (2.0 / width) * movement.startPosition.x - 1.0;
start.y = (2.0 / height) * (height - movement.startPosition.y) - 1.0;
start = Cartesian2.normalize(start, start);
let end = twist2DEnd;
end.x = (2.0 / width) * movement.endPosition.x - 1.0;
end.y = (2.0 / height) * (height - movement.endPosition.y) - 1.0;
end = Cartesian2.normalize(end, end);
let startTheta = CesiumMath.acosClamped(start.x);
if (start.y < 0) {
startTheta = CesiumMath.TWO_PI - startTheta;
}
let endTheta = CesiumMath.acosClamped(end.x);
if (end.y < 0) {
endTheta = CesiumMath.TWO_PI - endTheta;
}
const theta = endTheta - startTheta;
camera.twistRight(theta);
}
function singleAxisTwist2D(controller, startPosition, movement) {
let rotateRate =
controller._rotateFactor * controller._rotateRateRangeAdjustment;
if (rotateRate > controller._maximumRotateRate) {
rotateRate = controller._maximumRotateRate;
}
if (rotateRate < controller._minimumRotateRate) {
rotateRate = controller._minimumRotateRate;
}
const scene = controller._scene;
const camera = scene.camera;
const canvas = scene.canvas;
let phiWindowRatio =
(movement.endPosition.x - movement.startPosition.x) / canvas.clientWidth;
phiWindowRatio = Math.min(phiWindowRatio, controller.maximumMovementRatio);
const deltaPhi = rotateRate * phiWindowRatio * Math.PI * 4.0;
camera.twistRight(deltaPhi);
}
function update2D(controller) {
const rotatable2D = controller._scene.mapMode2D === MapMode2D.ROTATE;
if (!Matrix4.equals(Matrix4.IDENTITY, controller._scene.camera.transform)) {
reactToInput(
controller,
controller.enableZoom,
controller.zoomEventTypes,
zoom2D,
controller.inertiaZoom,
"_lastInertiaZoomMovement",
);
Iif (rotatable2D) {
reactToInput(
controller,
controller.enableRotate,
controller.translateEventTypes,
twist2D,
controller.inertiaSpin,
"_lastInertiaSpinMovement",
);
}
} else {
reactToInput(
controller,
controller.enableTranslate,
controller.translateEventTypes,
translate2D,
controller.inertiaTranslate,
"_lastInertiaTranslateMovement",
);
reactToInput(
controller,
controller.enableZoom,
controller.zoomEventTypes,
zoom2D,
controller.inertiaZoom,
"_lastInertiaZoomMovement",
);
if (rotatable2D) {
reactToInput(
controller,
controller.enableRotate,
controller.tiltEventTypes,
twist2D,
controller.inertiaSpin,
"_lastInertiaTiltMovement",
);
}
}
}
const pickGlobeScratchRay = new Ray();
const scratchDepthIntersection = new Cartesian3();
const scratchRayIntersection = new Cartesian3();
function pickPosition(controller, mousePosition, result) {
const scene = controller._scene;
const globe = controller._globe;
const camera = scene.camera;
let depthIntersection;
if (scene.pickPositionSupported) {
depthIntersection = scene.pickPositionWorldCoordinates(
mousePosition,
scratchDepthIntersection,
);
}
if (!defined(globe)) {
return Cartesian3.clone(depthIntersection, result);
}
const cullBackFaces = !controller._cameraUnderground;
const ray = camera.getPickRay(mousePosition, pickGlobeScratchRay);
const rayIntersection = globe.pickWorldCoordinates(
ray,
scene,
cullBackFaces,
scratchRayIntersection,
);
const pickDistance = defined(depthIntersection)
? Cartesian3.distance(depthIntersection, camera.positionWC)
: Number.POSITIVE_INFINITY;
const rayDistance = defined(rayIntersection)
? Cartesian3.distance(rayIntersection, camera.positionWC)
: Number.POSITIVE_INFINITY;
if (pickDistance < rayDistance) {
return Cartesian3.clone(depthIntersection, result);
}
return Cartesian3.clone(rayIntersection, result);
}
const scratchDistanceCartographic = new Cartographic();
function getDistanceFromSurface(controller) {
const ellipsoid = controller._ellipsoid;
const scene = controller._scene;
const camera = scene.camera;
const mode = scene.mode;
let height = 0.0;
if (mode === SceneMode.SCENE3D) {
const cartographic = ellipsoid.cartesianToCartographic(
camera.position,
scratchDistanceCartographic,
);
Eif (defined(cartographic)) {
height = cartographic.height;
}
} else {
height = camera.position.z;
}
const globeHeight = controller._scene.globeHeight ?? 0.0;
const distanceFromSurface = Math.abs(globeHeight - height);
return distanceFromSurface;
}
const scratchSurfaceNormal = new Cartesian3();
function getZoomDistanceUnderground(controller, ray) {
const origin = ray.origin;
const direction = ray.direction;
const distanceFromSurface = getDistanceFromSurface(controller);
// Weight zoom distance based on how strongly the pick ray is pointing inward.
// Geocentric normal is accurate enough for these purposes
const surfaceNormal = Cartesian3.normalize(origin, scratchSurfaceNormal);
let strength = Math.abs(Cartesian3.dot(surfaceNormal, direction));
strength = Math.max(strength, 0.5) * 2.0;
return distanceFromSurface * strength;
}
function getTiltCenterUnderground(controller, ray, pickedPosition, result) {
let distance = Cartesian3.distance(ray.origin, pickedPosition);
const distanceFromSurface = getDistanceFromSurface(controller);
const maximumDistance = CesiumMath.clamp(
distanceFromSurface * 5.0,
controller._minimumUndergroundPickDistance,
controller._maximumUndergroundPickDistance,
);
if (distance > maximumDistance) {
// Simulate look-at behavior by tilting around a small invisible sphere
distance = Math.min(distance, distanceFromSurface / 5.0);
distance = Math.max(distance, 100.0);
}
return Ray.getPoint(ray, distance, result);
}
function getStrafeStartPositionUnderground(
controller,
ray,
pickedPosition,
result,
) {
let distance;
Iif (!defined(pickedPosition)) {
distance = getDistanceFromSurface(controller);
} else {
distance = Cartesian3.distance(ray.origin, pickedPosition);
if (distance > controller._maximumUndergroundPickDistance) {
// If the picked position is too far away set the strafe speed based on the
// camera's height from the globe surface
distance = getDistanceFromSurface(controller);
}
}
return Ray.getPoint(ray, distance, result);
}
const scratchInertialDelta = new Cartesian2();
function continueStrafing(controller, movement) {
// Update the end position continually based on the inertial delta
const originalEndPosition = movement.endPosition;
const inertialDelta = Cartesian2.subtract(
movement.endPosition,
movement.startPosition,
scratchInertialDelta,
);
const endPosition = controller._strafeEndMousePosition;
Cartesian2.add(endPosition, inertialDelta, endPosition);
movement.endPosition = endPosition;
strafe(controller, movement, controller._strafeStartPosition);
movement.endPosition = originalEndPosition;
}
const translateCVStartRay = new Ray();
const translateCVEndRay = new Ray();
const translateCVStartPos = new Cartesian3();
const translateCVEndPos = new Cartesian3();
const translateCVDifference = new Cartesian3();
const translateCVOrigin = new Cartesian3();
const translateCVPlane = new Plane(Cartesian3.UNIT_X, 0.0);
const translateCVStartMouse = new Cartesian2();
const translateCVEndMouse = new Cartesian2();
function translateCV(controller, startPosition, movement) {
Eif (!Cartesian3.equals(startPosition, controller._translateMousePosition)) {
controller._looking = false;
}
Eif (!Cartesian3.equals(startPosition, controller._strafeMousePosition)) {
controller._strafing = false;
}
Iif (controller._looking) {
look3D(controller, startPosition, movement);
return;
}
Iif (controller._strafing) {
continueStrafing(controller, movement);
return;
}
const scene = controller._scene;
const camera = scene.camera;
const cameraUnderground = controller._cameraUnderground;
const startMouse = Cartesian2.clone(
movement.startPosition,
translateCVStartMouse,
);
const endMouse = Cartesian2.clone(movement.endPosition, translateCVEndMouse);
let startRay = camera.getPickRay(startMouse, translateCVStartRay);
const origin = Cartesian3.clone(Cartesian3.ZERO, translateCVOrigin);
const normal = Cartesian3.UNIT_X;
let globePos;
if (camera.position.z < controller._minimumPickingTerrainHeight) {
globePos = pickPosition(controller, startMouse, translateCVStartPos);
Eif (defined(globePos)) {
origin.x = globePos.x;
}
}
if (
cameraUnderground ||
(origin.x > camera.position.z && defined(globePos))
) {
let pickPosition = globePos;
Eif (cameraUnderground) {
pickPosition = getStrafeStartPositionUnderground(
controller,
startRay,
globePos,
translateCVStartPos,
);
}
Cartesian2.clone(startPosition, controller._strafeMousePosition);
Cartesian2.clone(startPosition, controller._strafeEndMousePosition);
Cartesian3.clone(pickPosition, controller._strafeStartPosition);
controller._strafing = true;
strafe(controller, movement, controller._strafeStartPosition);
return;
}
const plane = Plane.fromPointNormal(origin, normal, translateCVPlane);
startRay = camera.getPickRay(startMouse, translateCVStartRay);
const startPlanePos = IntersectionTests.rayPlane(
startRay,
plane,
translateCVStartPos,
);
const endRay = camera.getPickRay(endMouse, translateCVEndRay);
const endPlanePos = IntersectionTests.rayPlane(
endRay,
plane,
translateCVEndPos,
);
Iif (!defined(startPlanePos) || !defined(endPlanePos)) {
controller._looking = true;
look3D(controller, startPosition, movement);
Cartesian2.clone(startPosition, controller._translateMousePosition);
return;
}
const diff = Cartesian3.subtract(
startPlanePos,
endPlanePos,
translateCVDifference,
);
const temp = diff.x;
diff.x = diff.y;
diff.y = diff.z;
diff.z = temp;
const mag = Cartesian3.magnitude(diff);
Eif (mag > CesiumMath.EPSILON6) {
Cartesian3.normalize(diff, diff);
camera.move(diff, mag);
}
}
const rotateCVWindowPos = new Cartesian2();
const rotateCVWindowRay = new Ray();
const rotateCVCenter = new Cartesian3();
const rotateCVVerticalCenter = new Cartesian3();
const rotateCVTransform = new Matrix4();
const rotateCVVerticalTransform = new Matrix4();
const rotateCVOrigin = new Cartesian3();
const rotateCVPlane = new Plane(Cartesian3.UNIT_X, 0.0);
const rotateCVCartesian3 = new Cartesian3();
const rotateCVCart = new Cartographic();
const rotateCVOldTransform = new Matrix4();
const rotateCVQuaternion = new Quaternion();
const rotateCVMatrix = new Matrix3();
const tilt3DCartesian3 = new Cartesian3();
function rotateCV(controller, startPosition, movement) {
Iif (defined(movement.angleAndHeight)) {
movement = movement.angleAndHeight;
}
Eif (!Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
controller._tiltCVOffMap = false;
controller._looking = false;
}
Iif (controller._looking) {
look3D(controller, startPosition, movement);
return;
}
const scene = controller._scene;
const camera = scene.camera;
if (
controller._tiltCVOffMap ||
!controller.onMap() ||
Math.abs(camera.position.z) > controller._minimumPickingTerrainHeight
) {
controller._tiltCVOffMap = true;
rotateCVOnPlane(controller, startPosition, movement);
} else {
rotateCVOnTerrain(controller, startPosition, movement);
}
}
function rotateCVOnPlane(controller, startPosition, movement) {
const scene = controller._scene;
const camera = scene.camera;
const canvas = scene.canvas;
const windowPosition = rotateCVWindowPos;
windowPosition.x = canvas.clientWidth / 2;
windowPosition.y = canvas.clientHeight / 2;
const ray = camera.getPickRay(windowPosition, rotateCVWindowRay);
const normal = Cartesian3.UNIT_X;
const position = ray.origin;
const direction = ray.direction;
let scalar;
const normalDotDirection = Cartesian3.dot(normal, direction);
Eif (Math.abs(normalDotDirection) > CesiumMath.EPSILON6) {
scalar = -Cartesian3.dot(normal, position) / normalDotDirection;
}
Iif (!defined(scalar) || scalar <= 0.0) {
controller._looking = true;
look3D(controller, startPosition, movement);
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
return;
}
const center = Cartesian3.multiplyByScalar(direction, scalar, rotateCVCenter);
Cartesian3.add(position, center, center);
const projection = scene.mapProjection;
const ellipsoid = projection.ellipsoid;
Cartesian3.fromElements(center.y, center.z, center.x, center);
const cart = projection.unproject(center, rotateCVCart);
ellipsoid.cartographicToCartesian(cart, center);
const transform = Transforms.eastNorthUpToFixedFrame(
center,
ellipsoid,
rotateCVTransform,
);
const oldGlobe = controller._globe;
const oldEllipsoid = controller._ellipsoid;
controller._globe = undefined;
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
controller._rotateFactor = 1.0;
controller._rotateRateRangeAdjustment = 1.0;
const oldTransform = Matrix4.clone(camera.transform, rotateCVOldTransform);
camera._setTransform(transform);
rotate3D(controller, startPosition, movement, Cartesian3.UNIT_Z);
camera._setTransform(oldTransform);
controller._globe = oldGlobe;
controller._ellipsoid = oldEllipsoid;
const radius = oldEllipsoid.maximumRadius;
controller._rotateFactor = 1.0 / radius;
controller._rotateRateRangeAdjustment = radius;
}
function rotateCVOnTerrain(controller, startPosition, movement) {
const scene = controller._scene;
const camera = scene.camera;
const cameraUnderground = controller._cameraUnderground;
let center;
let ray;
const normal = Cartesian3.UNIT_X;
Iif (Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
center = Cartesian3.clone(controller._tiltCenter, rotateCVCenter);
} else {
Eif (camera.position.z < controller._minimumPickingTerrainHeight) {
center = pickPosition(controller, startPosition, rotateCVCenter);
}
Iif (!defined(center)) {
ray = camera.getPickRay(startPosition, rotateCVWindowRay);
const position = ray.origin;
const direction = ray.direction;
let scalar;
const normalDotDirection = Cartesian3.dot(normal, direction);
if (Math.abs(normalDotDirection) > CesiumMath.EPSILON6) {
scalar = -Cartesian3.dot(normal, position) / normalDotDirection;
}
if (!defined(scalar) || scalar <= 0.0) {
controller._looking = true;
look3D(controller, startPosition, movement);
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
return;
}
center = Cartesian3.multiplyByScalar(direction, scalar, rotateCVCenter);
Cartesian3.add(position, center, center);
}
Eif (cameraUnderground) {
Eif (!defined(ray)) {
ray = camera.getPickRay(startPosition, rotateCVWindowRay);
}
getTiltCenterUnderground(controller, ray, center, center);
}
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
Cartesian3.clone(center, controller._tiltCenter);
}
const canvas = scene.canvas;
const windowPosition = rotateCVWindowPos;
windowPosition.x = canvas.clientWidth / 2;
windowPosition.y = controller._tiltCenterMousePosition.y;
ray = camera.getPickRay(windowPosition, rotateCVWindowRay);
const origin = Cartesian3.clone(Cartesian3.ZERO, rotateCVOrigin);
origin.x = center.x;
const plane = Plane.fromPointNormal(origin, normal, rotateCVPlane);
const verticalCenter = IntersectionTests.rayPlane(
ray,
plane,
rotateCVVerticalCenter,
);
const projection = camera._projection;
const ellipsoid = projection.ellipsoid;
Cartesian3.fromElements(center.y, center.z, center.x, center);
let cart = projection.unproject(center, rotateCVCart);
ellipsoid.cartographicToCartesian(cart, center);
const transform = Transforms.eastNorthUpToFixedFrame(
center,
ellipsoid,
rotateCVTransform,
);
let verticalTransform;
if (defined(verticalCenter)) {
Cartesian3.fromElements(
verticalCenter.y,
verticalCenter.z,
verticalCenter.x,
verticalCenter,
);
cart = projection.unproject(verticalCenter, rotateCVCart);
ellipsoid.cartographicToCartesian(cart, verticalCenter);
verticalTransform = Transforms.eastNorthUpToFixedFrame(
verticalCenter,
ellipsoid,
rotateCVVerticalTransform,
);
} else E{
verticalTransform = transform;
}
const oldGlobe = controller._globe;
const oldEllipsoid = controller._ellipsoid;
controller._globe = undefined;
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
controller._rotateFactor = 1.0;
controller._rotateRateRangeAdjustment = 1.0;
let constrainedAxis = Cartesian3.UNIT_Z;
const oldTransform = Matrix4.clone(camera.transform, rotateCVOldTransform);
camera._setTransform(transform);
const tangent = Cartesian3.cross(
Cartesian3.UNIT_Z,
Cartesian3.normalize(camera.position, rotateCVCartesian3),
rotateCVCartesian3,
);
const dot = Cartesian3.dot(camera.right, tangent);
rotate3D(controller, startPosition, movement, constrainedAxis, false, true);
camera._setTransform(verticalTransform);
if (dot < 0.0) {
const movementDelta = movement.startPosition.y - movement.endPosition.y;
Iif (
(cameraUnderground && movementDelta < 0.0) ||
(!cameraUnderground && movementDelta > 0.0)
) {
// Prevent camera from flipping past the up axis
constrainedAxis = undefined;
}
const oldConstrainedAxis = camera.constrainedAxis;
camera.constrainedAxis = undefined;
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
camera.constrainedAxis = oldConstrainedAxis;
} else E{
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
}
Iif (defined(camera.constrainedAxis)) {
const right = Cartesian3.cross(
camera.direction,
camera.constrainedAxis,
tilt3DCartesian3,
);
if (
!Cartesian3.equalsEpsilon(right, Cartesian3.ZERO, CesiumMath.EPSILON6)
) {
if (Cartesian3.dot(right, camera.right) < 0.0) {
Cartesian3.negate(right, right);
}
Cartesian3.cross(right, camera.direction, camera.up);
Cartesian3.cross(camera.direction, camera.up, camera.right);
Cartesian3.normalize(camera.up, camera.up);
Cartesian3.normalize(camera.right, camera.right);
}
}
camera._setTransform(oldTransform);
controller._globe = oldGlobe;
controller._ellipsoid = oldEllipsoid;
const radius = oldEllipsoid.maximumRadius;
controller._rotateFactor = 1.0 / radius;
controller._rotateRateRangeAdjustment = radius;
const originalPosition = Cartesian3.clone(
camera.positionWC,
rotateCVCartesian3,
);
Iif (controller.enableCollisionDetection) {
adjustHeightForTerrain(controller, true);
}
Iif (!Cartesian3.equals(camera.positionWC, originalPosition)) {
camera._setTransform(verticalTransform);
camera.worldToCameraCoordinatesPoint(originalPosition, originalPosition);
const magSqrd = Cartesian3.magnitudeSquared(originalPosition);
if (Cartesian3.magnitudeSquared(camera.position) > magSqrd) {
Cartesian3.normalize(camera.position, camera.position);
Cartesian3.multiplyByScalar(
camera.position,
Math.sqrt(magSqrd),
camera.position,
);
}
const angle = Cartesian3.angleBetween(originalPosition, camera.position);
const axis = Cartesian3.cross(
originalPosition,
camera.position,
originalPosition,
);
Cartesian3.normalize(axis, axis);
const quaternion = Quaternion.fromAxisAngle(
axis,
angle,
rotateCVQuaternion,
);
const rotation = Matrix3.fromQuaternion(quaternion, rotateCVMatrix);
Matrix3.multiplyByVector(rotation, camera.direction, camera.direction);
Matrix3.multiplyByVector(rotation, camera.up, camera.up);
Cartesian3.cross(camera.direction, camera.up, camera.right);
Cartesian3.cross(camera.right, camera.direction, camera.up);
camera._setTransform(oldTransform);
}
}
const zoomCVWindowPos = new Cartesian2();
const zoomCVWindowRay = new Ray();
const zoomCVIntersection = new Cartesian3();
function zoomCV(controller, startPosition, movement) {
Iif (defined(movement.distance)) {
movement = movement.distance;
}
const scene = controller._scene;
const camera = scene.camera;
const canvas = scene.canvas;
const cameraUnderground = controller._cameraUnderground;
let windowPosition;
if (cameraUnderground) {
windowPosition = startPosition;
} else {
windowPosition = zoomCVWindowPos;
windowPosition.x = canvas.clientWidth / 2;
windowPosition.y = canvas.clientHeight / 2;
}
const ray = camera.getPickRay(windowPosition, zoomCVWindowRay);
const position = ray.origin;
const direction = ray.direction;
const height = camera.position.z;
let intersection;
if (height < controller._minimumPickingTerrainHeight) {
intersection = pickPosition(controller, windowPosition, zoomCVIntersection);
}
let distance;
if (defined(intersection)) {
distance = Cartesian3.distance(position, intersection);
}
if (cameraUnderground) {
const distanceUnderground = getZoomDistanceUnderground(
controller,
ray,
height,
);
if (defined(distance)) {
distance = Math.min(distance, distanceUnderground);
} else E{
distance = distanceUnderground;
}
}
if (!defined(distance)) {
const normal = Cartesian3.UNIT_X;
distance =
-Cartesian3.dot(normal, position) / Cartesian3.dot(normal, direction);
}
handleZoom(
controller,
startPosition,
movement,
controller.zoomFactor,
distance,
);
}
function updateCV(controller) {
const scene = controller._scene;
const camera = scene.camera;
if (!Matrix4.equals(Matrix4.IDENTITY, camera.transform)) {
reactToInput(
controller,
controller.enableRotate,
controller.rotateEventTypes,
rotate3D,
controller.inertiaSpin,
"_lastInertiaSpinMovement",
);
reactToInput(
controller,
controller.enableZoom,
controller.zoomEventTypes,
zoom3D,
controller.inertiaZoom,
"_lastInertiaZoomMovement",
);
} else {
const tweens = controller._tweens;
if (controller._aggregator.anyButtonDown) {
tweens.removeAll();
}
reactToInput(
controller,
controller.enableTilt,
controller.tiltEventTypes,
rotateCV,
controller.inertiaSpin,
"_lastInertiaTiltMovement",
);
reactToInput(
controller,
controller.enableTranslate,
controller.translateEventTypes,
translateCV,
controller.inertiaTranslate,
"_lastInertiaTranslateMovement",
);
reactToInput(
controller,
controller.enableZoom,
controller.zoomEventTypes,
zoomCV,
controller.inertiaZoom,
"_lastInertiaZoomMovement",
);
reactToInput(
controller,
controller.enableLook,
controller.lookEventTypes,
look3D,
);
if (
!controller._aggregator.anyButtonDown &&
!tweens.contains(controller._tween)
) {
const tween = camera.createCorrectPositionTween(
controller.bounceAnimationTime,
);
if (defined(tween)) {
controller._tween = tweens.add(tween);
}
}
tweens.update();
}
}
const scratchStrafeRay = new Ray();
const scratchStrafePlane = new Plane(Cartesian3.UNIT_X, 0.0);
const scratchStrafeIntersection = new Cartesian3();
const scratchStrafeDirection = new Cartesian3();
function strafe(controller, movement, strafeStartPosition) {
const scene = controller._scene;
const camera = scene.camera;
const ray = camera.getPickRay(movement.endPosition, scratchStrafeRay);
let direction = Cartesian3.clone(camera.direction, scratchStrafeDirection);
if (scene.mode === SceneMode.COLUMBUS_VIEW) {
Cartesian3.fromElements(direction.z, direction.x, direction.y, direction);
}
const plane = Plane.fromPointNormal(
strafeStartPosition,
direction,
scratchStrafePlane,
);
const intersection = IntersectionTests.rayPlane(
ray,
plane,
scratchStrafeIntersection,
);
Iif (!defined(intersection)) {
return;
}
direction = Cartesian3.subtract(strafeStartPosition, intersection, direction);
if (scene.mode === SceneMode.COLUMBUS_VIEW) {
Cartesian3.fromElements(direction.y, direction.z, direction.x, direction);
}
Cartesian3.add(camera.position, direction, camera.position);
}
const spin3DPick = new Cartesian3();
const scratchCartographic = new Cartographic();
const scratchRadii = new Cartesian3();
const scratchEllipsoid = new Ellipsoid();
const scratchLookUp = new Cartesian3();
const scratchNormal = new Cartesian3();
const scratchMousePosition = new Cartesian3();
function spin3D(controller, startPosition, movement) {
const scene = controller._scene;
const camera = scene.camera;
const cameraUnderground = controller._cameraUnderground;
let ellipsoid = controller._ellipsoid;
Iif (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
rotate3D(controller, startPosition, movement);
return;
}
let magnitude;
let radii;
const up = ellipsoid.geodeticSurfaceNormal(camera.position, scratchLookUp);
Iif (Cartesian2.equals(startPosition, controller._rotateMousePosition)) {
if (controller._looking) {
look3D(controller, startPosition, movement, up);
} else if (controller._rotating) {
rotate3D(controller, startPosition, movement);
} else if (controller._strafing) {
continueStrafing(controller, movement);
} else {
if (
Cartesian3.magnitude(camera.position) <
Cartesian3.magnitude(controller._rotateStartPosition)
) {
// Pan action is no longer valid if camera moves below the pan ellipsoid
return;
}
magnitude = Cartesian3.magnitude(controller._rotateStartPosition);
radii = scratchRadii;
radii.x = radii.y = radii.z = magnitude;
ellipsoid = Ellipsoid.fromCartesian3(radii, scratchEllipsoid);
pan3D(controller, startPosition, movement, ellipsoid);
}
return;
}
controller._looking = false;
controller._rotating = false;
controller._strafing = false;
const height = ellipsoid.cartesianToCartographic(
camera.positionWC,
scratchCartographic,
).height;
const globe = controller._globe;
if (defined(globe) && height < controller._minimumPickingTerrainHeight) {
const mousePos = pickPosition(
controller,
movement.startPosition,
scratchMousePosition,
);
if (defined(mousePos)) {
let strafing = false;
const ray = camera.getPickRay(
movement.startPosition,
pickGlobeScratchRay,
);
if (cameraUnderground) {
strafing = true;
getStrafeStartPositionUnderground(controller, ray, mousePos, mousePos);
} else E{
const normal = ellipsoid.geodeticSurfaceNormal(mousePos, scratchNormal);
const tangentPick =
Math.abs(Cartesian3.dot(ray.direction, normal)) < 0.05;
if (tangentPick) {
strafing = true;
} else {
strafing =
Cartesian3.magnitude(camera.position) <
Cartesian3.magnitude(mousePos);
}
}
if (strafing) {
Cartesian2.clone(startPosition, controller._strafeEndMousePosition);
Cartesian3.clone(mousePos, controller._strafeStartPosition);
controller._strafing = true;
strafe(controller, movement, controller._strafeStartPosition);
} else E{
magnitude = Cartesian3.magnitude(mousePos);
radii = scratchRadii;
radii.x = radii.y = radii.z = magnitude;
ellipsoid = Ellipsoid.fromCartesian3(radii, scratchEllipsoid);
pan3D(controller, startPosition, movement, ellipsoid);
Cartesian3.clone(mousePos, controller._rotateStartPosition);
}
} else E{
controller._looking = true;
look3D(controller, startPosition, movement, up);
}
} else if (
defined(
camera.pickEllipsoid(
movement.startPosition,
controller._ellipsoid,
spin3DPick,
),
)
) {
pan3D(controller, startPosition, movement, controller._ellipsoid);
Cartesian3.clone(spin3DPick, controller._rotateStartPosition);
} else if (height > controller._minimumTrackBallHeight) {
controller._rotating = true;
rotate3D(controller, startPosition, movement);
} else E{
controller._looking = true;
look3D(controller, startPosition, movement, up);
}
Cartesian2.clone(startPosition, controller._rotateMousePosition);
}
function rotate3D(
controller,
startPosition,
movement,
constrainedAxis,
rotateOnlyVertical,
rotateOnlyHorizontal,
) {
rotateOnlyVertical = rotateOnlyVertical ?? false;
rotateOnlyHorizontal = rotateOnlyHorizontal ?? false;
const scene = controller._scene;
const camera = scene.camera;
const canvas = scene.canvas;
const oldAxis = camera.constrainedAxis;
if (defined(constrainedAxis)) {
camera.constrainedAxis = constrainedAxis;
}
const rho = Cartesian3.magnitude(camera.position);
let rotateRate =
controller._rotateFactor * (rho - controller._rotateRateRangeAdjustment);
if (rotateRate > controller._maximumRotateRate) {
rotateRate = controller._maximumRotateRate;
}
if (rotateRate < controller._minimumRotateRate) {
rotateRate = controller._minimumRotateRate;
}
let phiWindowRatio =
(movement.startPosition.x - movement.endPosition.x) / canvas.clientWidth;
let thetaWindowRatio =
(movement.startPosition.y - movement.endPosition.y) / canvas.clientHeight;
phiWindowRatio = Math.min(phiWindowRatio, controller.maximumMovementRatio);
thetaWindowRatio = Math.min(
thetaWindowRatio,
controller.maximumMovementRatio,
);
const deltaPhi = rotateRate * phiWindowRatio * Math.PI * 2.0;
let deltaTheta = rotateRate * thetaWindowRatio * Math.PI;
if (defined(constrainedAxis) && defined(controller.maximumTiltAngle)) {
const maximumTiltAngle = controller.maximumTiltAngle;
const dotProduct = Cartesian3.dot(camera.direction, constrainedAxis);
const tilt = Math.PI - Math.acos(dotProduct) + deltaTheta;
if (tilt > maximumTiltAngle) {
deltaTheta -= tilt - maximumTiltAngle;
}
}
if (!rotateOnlyVertical) {
camera.rotateRight(deltaPhi);
}
if (!rotateOnlyHorizontal) {
camera.rotateUp(deltaTheta);
}
camera.constrainedAxis = oldAxis;
}
const pan3DP0 = Cartesian4.clone(Cartesian4.UNIT_W);
const pan3DP1 = Cartesian4.clone(Cartesian4.UNIT_W);
const pan3DTemp0 = new Cartesian3();
const pan3DTemp1 = new Cartesian3();
const pan3DTemp2 = new Cartesian3();
const pan3DTemp3 = new Cartesian3();
const pan3DStartMousePosition = new Cartesian2();
const pan3DEndMousePosition = new Cartesian2();
const pan3DDiffMousePosition = new Cartesian2();
const pan3DPixelDimensions = new Cartesian2();
const panRay = new Ray();
function pan3D(controller, startPosition, movement, ellipsoid) {
const scene = controller._scene;
const camera = scene.camera;
const startMousePosition = Cartesian2.clone(
movement.startPosition,
pan3DStartMousePosition,
);
const endMousePosition = Cartesian2.clone(
movement.endPosition,
pan3DEndMousePosition,
);
const height = ellipsoid.cartesianToCartographic(
camera.positionWC,
scratchCartographic,
).height;
let p0, p1;
Iif (
!movement.inertiaEnabled &&
height < controller._minimumPickingTerrainHeight
) {
p0 = Cartesian3.clone(controller._panLastWorldPosition, pan3DP0);
// Use the last picked world position unless we're starting a new drag
if (
!defined(controller._globe) &&
!Cartesian2.equalsEpsilon(
startMousePosition,
controller._panLastMousePosition,
)
) {
p0 = pickPosition(controller, startMousePosition, pan3DP0);
}
if (!defined(controller._globe) && defined(p0)) {
const toCenter = Cartesian3.subtract(p0, camera.positionWC, pan3DTemp1);
const toCenterProj = Cartesian3.multiplyByScalar(
camera.directionWC,
Cartesian3.dot(camera.directionWC, toCenter),
pan3DTemp1,
);
const distanceToNearPlane = Cartesian3.magnitude(toCenterProj);
const pixelDimensions = camera.frustum.getPixelDimensions(
scene.drawingBufferWidth,
scene.drawingBufferHeight,
distanceToNearPlane,
scene.pixelRatio,
pan3DPixelDimensions,
);
const dragDelta = Cartesian2.subtract(
endMousePosition,
startMousePosition,
pan3DDiffMousePosition,
);
// Move the camera to the the distance the cursor moved in worldspace
const right = Cartesian3.multiplyByScalar(
camera.rightWC,
dragDelta.x * pixelDimensions.x,
pan3DTemp1,
);
// Move the camera towards the picked position in worldspace as the camera is pointed towards a horizon view
const cameraPositionNormal = Cartesian3.normalize(
camera.positionWC,
scratchCameraPositionNormal,
);
const endPickDirection = camera.getPickRay(
endMousePosition,
panRay,
).direction;
const endPickProj = Cartesian3.subtract(
endPickDirection,
Cartesian3.projectVector(endPickDirection, camera.rightWC, pan3DTemp2),
pan3DTemp2,
);
const angle = Cartesian3.angleBetween(endPickProj, camera.directionWC);
let forward = 1.0;
if (defined(camera.frustum.fov)) {
forward = Math.max(Math.tan(angle), 0.1); // Clamp so we don't make the magnitude infinitely large when the angle is small
}
let dot = Math.abs(
Cartesian3.dot(camera.directionWC, cameraPositionNormal),
);
const magnitude =
((-dragDelta.y * pixelDimensions.y * 2.0) / Math.sqrt(forward)) *
(1.0 - dot);
const direction = Cartesian3.multiplyByScalar(
endPickDirection,
magnitude,
pan3DTemp2,
);
// Move the camera up the distance the cursor moved in worldspace as the camera is pointed towards the center
dot = Math.abs(Cartesian3.dot(camera.upWC, cameraPositionNormal));
const up = Cartesian3.multiplyByScalar(
camera.upWC,
-dragDelta.y * (1.0 - dot) * pixelDimensions.y,
pan3DTemp3,
);
p1 = Cartesian3.add(p0, right, pan3DP1);
p1 = Cartesian3.add(p1, direction, p1);
p1 = Cartesian3.add(p1, up, p1);
Cartesian3.clone(p1, controller._panLastWorldPosition);
Cartesian2.clone(endMousePosition, controller._panLastMousePosition);
}
}
Eif (!defined(p0) || !defined(p1)) {
p0 = camera.pickEllipsoid(startMousePosition, ellipsoid, pan3DP0);
p1 = camera.pickEllipsoid(endMousePosition, ellipsoid, pan3DP1);
}
Iif (!defined(p0) || !defined(p1)) {
controller._rotating = true;
rotate3D(controller, startPosition, movement);
return;
}
p0 = camera.worldToCameraCoordinates(p0, p0);
p1 = camera.worldToCameraCoordinates(p1, p1);
if (!defined(camera.constrainedAxis)) {
Cartesian3.normalize(p0, p0);
Cartesian3.normalize(p1, p1);
const dot = Cartesian3.dot(p0, p1);
const axis = Cartesian3.cross(p0, p1, pan3DTemp0);
Eif (
dot < 1.0 &&
!Cartesian3.equalsEpsilon(axis, Cartesian3.ZERO, CesiumMath.EPSILON14)
) {
// dot is in [0, 1]
const angle = Math.acos(dot);
camera.rotate(axis, angle);
}
} else {
const basis0 = camera.constrainedAxis;
const basis1 = Cartesian3.mostOrthogonalAxis(basis0, pan3DTemp0);
Cartesian3.cross(basis1, basis0, basis1);
Cartesian3.normalize(basis1, basis1);
const basis2 = Cartesian3.cross(basis0, basis1, pan3DTemp1);
const startRho = Cartesian3.magnitude(p0);
const startDot = Cartesian3.dot(basis0, p0);
const startTheta = Math.acos(startDot / startRho);
const startRej = Cartesian3.multiplyByScalar(basis0, startDot, pan3DTemp2);
Cartesian3.subtract(p0, startRej, startRej);
Cartesian3.normalize(startRej, startRej);
const endRho = Cartesian3.magnitude(p1);
const endDot = Cartesian3.dot(basis0, p1);
const endTheta = Math.acos(endDot / endRho);
const endRej = Cartesian3.multiplyByScalar(basis0, endDot, pan3DTemp3);
Cartesian3.subtract(p1, endRej, endRej);
Cartesian3.normalize(endRej, endRej);
let startPhi = Math.acos(Cartesian3.dot(startRej, basis1));
Iif (Cartesian3.dot(startRej, basis2) < 0) {
startPhi = CesiumMath.TWO_PI - startPhi;
}
let endPhi = Math.acos(Cartesian3.dot(endRej, basis1));
if (Cartesian3.dot(endRej, basis2) < 0) {
endPhi = CesiumMath.TWO_PI - endPhi;
}
const deltaPhi = startPhi - endPhi;
let east;
Iif (
Cartesian3.equalsEpsilon(basis0, camera.position, CesiumMath.EPSILON2)
) {
east = camera.right;
} else {
east = Cartesian3.cross(basis0, camera.position, pan3DTemp0);
}
const planeNormal = Cartesian3.cross(basis0, east, pan3DTemp0);
const side0 = Cartesian3.dot(
planeNormal,
Cartesian3.subtract(p0, basis0, pan3DTemp1),
);
const side1 = Cartesian3.dot(
planeNormal,
Cartesian3.subtract(p1, basis0, pan3DTemp1),
);
let deltaTheta;
Iif (side0 > 0 && side1 > 0) {
deltaTheta = endTheta - startTheta;
} else Iif (side0 > 0 && side1 <= 0) {
if (Cartesian3.dot(camera.position, basis0) > 0) {
deltaTheta = -startTheta - endTheta;
} else {
deltaTheta = startTheta + endTheta;
}
} else {
deltaTheta = startTheta - endTheta;
}
camera.rotateRight(deltaPhi);
camera.rotateUp(deltaTheta);
}
}
const zoom3DUnitPosition = new Cartesian3();
const zoom3DCartographic = new Cartographic();
let preIntersectionDistance = 0;
function zoom3D(controller, startPosition, movement) {
Iif (defined(movement.distance)) {
movement = movement.distance;
}
const inertiaMovement = movement.inertiaEnabled;
const ellipsoid = controller._ellipsoid;
const scene = controller._scene;
const camera = scene.camera;
const canvas = scene.canvas;
const cameraUnderground = controller._cameraUnderground;
let windowPosition;
if (cameraUnderground) {
windowPosition = startPosition;
} else {
windowPosition = zoomCVWindowPos;
windowPosition.x = canvas.clientWidth / 2;
windowPosition.y = canvas.clientHeight / 2;
}
const ray = camera.getPickRay(windowPosition, zoomCVWindowRay);
let intersection;
const height = ellipsoid.cartesianToCartographic(
camera.position,
zoom3DCartographic,
).height;
const approachingCollision =
Math.abs(preIntersectionDistance) <
controller.minimumPickingTerrainDistanceWithInertia;
const needPickGlobe = inertiaMovement
? approachingCollision
: height < controller._minimumPickingTerrainHeight;
if (needPickGlobe) {
intersection = pickPosition(controller, windowPosition, zoomCVIntersection);
}
let distance;
if (defined(intersection)) {
distance = Cartesian3.distance(ray.origin, intersection);
preIntersectionDistance = distance;
}
if (cameraUnderground) {
const distanceUnderground = getZoomDistanceUnderground(
controller,
ray,
height,
);
if (defined(distance)) {
distance = Math.min(distance, distanceUnderground);
} else E{
distance = distanceUnderground;
}
}
if (!defined(distance)) {
distance = height;
}
const unitPosition = Cartesian3.normalize(
camera.position,
zoom3DUnitPosition,
);
handleZoom(
controller,
startPosition,
movement,
controller.zoomFactor,
distance,
Cartesian3.dot(unitPosition, camera.direction),
);
}
const tilt3DWindowPos = new Cartesian2();
const tilt3DRay = new Ray();
const tilt3DCenter = new Cartesian3();
const tilt3DVerticalCenter = new Cartesian3();
const tilt3DTransform = new Matrix4();
const tilt3DVerticalTransform = new Matrix4();
const tilt3DOldTransform = new Matrix4();
const tilt3DQuaternion = new Quaternion();
const tilt3DMatrix = new Matrix3();
const tilt3DCart = new Cartographic();
const tilt3DLookUp = new Cartesian3();
function tilt3D(controller, startPosition, movement) {
const scene = controller._scene;
const camera = scene.camera;
Iif (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
return;
}
Iif (defined(movement.angleAndHeight)) {
movement = movement.angleAndHeight;
}
Eif (!Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
controller._tiltOnEllipsoid = false;
controller._looking = false;
}
Iif (controller._looking) {
const up = controller._ellipsoid.geodeticSurfaceNormal(
camera.position,
tilt3DLookUp,
);
look3D(controller, startPosition, movement, up);
return;
}
const ellipsoid = controller._ellipsoid;
const cartographic = ellipsoid.cartesianToCartographic(
camera.position,
tilt3DCart,
);
if (
controller._tiltOnEllipsoid ||
cartographic.height > controller._minimumCollisionTerrainHeight
) {
controller._tiltOnEllipsoid = true;
tilt3DOnEllipsoid(controller, startPosition, movement);
} else {
tilt3DOnTerrain(controller, startPosition, movement);
}
}
const tilt3DOnEllipsoidCartographic = new Cartographic();
function tilt3DOnEllipsoid(controller, startPosition, movement) {
const ellipsoid = controller._ellipsoid;
const scene = controller._scene;
const camera = scene.camera;
const minHeight = controller.minimumZoomDistance * 0.25;
const height = ellipsoid.cartesianToCartographic(
camera.positionWC,
tilt3DOnEllipsoidCartographic,
).height;
Iif (
height - minHeight - 1.0 < CesiumMath.EPSILON3 &&
movement.endPosition.y - movement.startPosition.y < 0
) {
return;
}
const canvas = scene.canvas;
const windowPosition = tilt3DWindowPos;
windowPosition.x = canvas.clientWidth / 2;
windowPosition.y = canvas.clientHeight / 2;
const ray = camera.getPickRay(windowPosition, tilt3DRay);
let center;
const intersection = IntersectionTests.rayEllipsoid(ray, ellipsoid);
if (defined(intersection)) {
center = Ray.getPoint(ray, intersection.start, tilt3DCenter);
} else Eif (height > controller._minimumTrackBallHeight) {
const grazingAltitudeLocation = IntersectionTests.grazingAltitudeLocation(
ray,
ellipsoid,
);
if (!defined(grazingAltitudeLocation)) {
return;
}
const grazingAltitudeCart = ellipsoid.cartesianToCartographic(
grazingAltitudeLocation,
tilt3DCart,
);
grazingAltitudeCart.height = 0.0;
center = ellipsoid.cartographicToCartesian(
grazingAltitudeCart,
tilt3DCenter,
);
} else {
controller._looking = true;
const up = controller._ellipsoid.geodeticSurfaceNormal(
camera.position,
tilt3DLookUp,
);
look3D(controller, startPosition, movement, up);
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
return;
}
const transform = Transforms.eastNorthUpToFixedFrame(
center,
ellipsoid,
tilt3DTransform,
);
const oldGlobe = controller._globe;
const oldEllipsoid = controller._ellipsoid;
controller._globe = undefined;
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
controller._rotateFactor = 1.0;
controller._rotateRateRangeAdjustment = 1.0;
const oldTransform = Matrix4.clone(camera.transform, tilt3DOldTransform);
camera._setTransform(transform);
rotate3D(controller, startPosition, movement, Cartesian3.UNIT_Z);
camera._setTransform(oldTransform);
controller._globe = oldGlobe;
controller._ellipsoid = oldEllipsoid;
const radius = oldEllipsoid.maximumRadius;
controller._rotateFactor = 1.0 / radius;
controller._rotateRateRangeAdjustment = radius;
}
function tilt3DOnTerrain(controller, startPosition, movement) {
const ellipsoid = controller._ellipsoid;
const scene = controller._scene;
const camera = scene.camera;
const cameraUnderground = controller._cameraUnderground;
let center;
let ray;
let intersection;
Iif (Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
center = Cartesian3.clone(controller._tiltCenter, tilt3DCenter);
} else {
center = pickPosition(controller, startPosition, tilt3DCenter);
if (!defined(center)) {
ray = camera.getPickRay(startPosition, tilt3DRay);
intersection = IntersectionTests.rayEllipsoid(ray, ellipsoid);
Iif (!defined(intersection)) {
const cartographic = ellipsoid.cartesianToCartographic(
camera.position,
tilt3DCart,
);
if (cartographic.height <= controller._minimumTrackBallHeight) {
controller._looking = true;
const up = controller._ellipsoid.geodeticSurfaceNormal(
camera.position,
tilt3DLookUp,
);
look3D(controller, startPosition, movement, up);
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
}
return;
}
center = Ray.getPoint(ray, intersection.start, tilt3DCenter);
}
if (cameraUnderground) {
Eif (!defined(ray)) {
ray = camera.getPickRay(startPosition, tilt3DRay);
}
getTiltCenterUnderground(controller, ray, center, center);
}
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
Cartesian3.clone(center, controller._tiltCenter);
}
const canvas = scene.canvas;
const windowPosition = tilt3DWindowPos;
windowPosition.x = canvas.clientWidth / 2;
windowPosition.y = controller._tiltCenterMousePosition.y;
ray = camera.getPickRay(windowPosition, tilt3DRay);
const mag = Cartesian3.magnitude(center);
const radii = Cartesian3.fromElements(mag, mag, mag, scratchRadii);
const newEllipsoid = Ellipsoid.fromCartesian3(radii, scratchEllipsoid);
intersection = IntersectionTests.rayEllipsoid(ray, newEllipsoid);
Iif (!defined(intersection)) {
return;
}
const t =
Cartesian3.magnitude(ray.origin) > mag
? intersection.start
: intersection.stop;
const verticalCenter = Ray.getPoint(ray, t, tilt3DVerticalCenter);
const transform = Transforms.eastNorthUpToFixedFrame(
center,
ellipsoid,
tilt3DTransform,
);
const verticalTransform = Transforms.eastNorthUpToFixedFrame(
verticalCenter,
newEllipsoid,
tilt3DVerticalTransform,
);
const oldGlobe = controller._globe;
const oldEllipsoid = controller._ellipsoid;
controller._globe = undefined;
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
controller._rotateFactor = 1.0;
controller._rotateRateRangeAdjustment = 1.0;
let constrainedAxis = Cartesian3.UNIT_Z;
const oldTransform = Matrix4.clone(camera.transform, tilt3DOldTransform);
camera._setTransform(verticalTransform);
const tangent = Cartesian3.cross(
verticalCenter,
camera.positionWC,
tilt3DCartesian3,
);
const dot = Cartesian3.dot(camera.rightWC, tangent);
if (dot < 0.0) {
const movementDelta = movement.startPosition.y - movement.endPosition.y;
if (
(cameraUnderground && movementDelta < 0.0) ||
(!cameraUnderground && movementDelta > 0.0)
) {
// Prevent camera from flipping past the up axis
constrainedAxis = undefined;
}
const oldConstrainedAxis = camera.constrainedAxis;
camera.constrainedAxis = undefined;
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
camera.constrainedAxis = oldConstrainedAxis;
} else E{
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
}
camera._setTransform(transform);
rotate3D(controller, startPosition, movement, constrainedAxis, false, true);
Iif (defined(camera.constrainedAxis)) {
const right = Cartesian3.cross(
camera.direction,
camera.constrainedAxis,
tilt3DCartesian3,
);
if (
!Cartesian3.equalsEpsilon(right, Cartesian3.ZERO, CesiumMath.EPSILON6)
) {
if (Cartesian3.dot(right, camera.right) < 0.0) {
Cartesian3.negate(right, right);
}
Cartesian3.cross(right, camera.direction, camera.up);
Cartesian3.cross(camera.direction, camera.up, camera.right);
Cartesian3.normalize(camera.up, camera.up);
Cartesian3.normalize(camera.right, camera.right);
}
}
camera._setTransform(oldTransform);
controller._globe = oldGlobe;
controller._ellipsoid = oldEllipsoid;
const radius = oldEllipsoid.maximumRadius;
controller._rotateFactor = 1.0 / radius;
controller._rotateRateRangeAdjustment = radius;
const originalPosition = Cartesian3.clone(
camera.positionWC,
tilt3DCartesian3,
);
if (controller.enableCollisionDetection) {
adjustHeightForTerrain(controller, true);
}
Iif (!Cartesian3.equals(camera.positionWC, originalPosition)) {
camera._setTransform(verticalTransform);
camera.worldToCameraCoordinatesPoint(originalPosition, originalPosition);
const magSqrd = Cartesian3.magnitudeSquared(originalPosition);
if (Cartesian3.magnitudeSquared(camera.position) > magSqrd) {
Cartesian3.normalize(camera.position, camera.position);
Cartesian3.multiplyByScalar(
camera.position,
Math.sqrt(magSqrd),
camera.position,
);
}
const angle = Cartesian3.angleBetween(originalPosition, camera.position);
const axis = Cartesian3.cross(
originalPosition,
camera.position,
originalPosition,
);
Cartesian3.normalize(axis, axis);
const quaternion = Quaternion.fromAxisAngle(axis, angle, tilt3DQuaternion);
const rotation = Matrix3.fromQuaternion(quaternion, tilt3DMatrix);
Matrix3.multiplyByVector(rotation, camera.direction, camera.direction);
Matrix3.multiplyByVector(rotation, camera.up, camera.up);
Cartesian3.cross(camera.direction, camera.up, camera.right);
Cartesian3.cross(camera.right, camera.direction, camera.up);
camera._setTransform(oldTransform);
}
}
const look3DStartPos = new Cartesian2();
const look3DEndPos = new Cartesian2();
const look3DStartRay = new Ray();
const look3DEndRay = new Ray();
const look3DNegativeRot = new Cartesian3();
const look3DTan = new Cartesian3();
function look3D(controller, startPosition, movement, rotationAxis) {
const scene = controller._scene;
const camera = scene.camera;
const startPos = look3DStartPos;
startPos.x = movement.startPosition.x;
startPos.y = 0.0;
const endPos = look3DEndPos;
endPos.x = movement.endPosition.x;
endPos.y = 0.0;
let startRay = camera.getPickRay(startPos, look3DStartRay);
let endRay = camera.getPickRay(endPos, look3DEndRay);
let angle = 0.0;
let start;
let end;
Iif (camera.frustum instanceof OrthographicFrustum) {
start = startRay.origin;
end = endRay.origin;
Cartesian3.add(camera.direction, start, start);
Cartesian3.add(camera.direction, end, end);
Cartesian3.subtract(start, camera.position, start);
Cartesian3.subtract(end, camera.position, end);
Cartesian3.normalize(start, start);
Cartesian3.normalize(end, end);
} else {
start = startRay.direction;
end = endRay.direction;
}
let dot = Cartesian3.dot(start, end);
if (dot < 1.0) {
// dot is in [0, 1]
angle = Math.acos(dot);
}
angle = movement.startPosition.x > movement.endPosition.x ? -angle : angle;
const horizontalRotationAxis = controller._horizontalRotationAxis;
Iif (defined(rotationAxis)) {
camera.look(rotationAxis, -angle);
} else if (defined(horizontalRotationAxis)) {
camera.look(horizontalRotationAxis, -angle);
} else {
camera.lookLeft(angle);
}
startPos.x = 0.0;
startPos.y = movement.startPosition.y;
endPos.x = 0.0;
endPos.y = movement.endPosition.y;
startRay = camera.getPickRay(startPos, look3DStartRay);
endRay = camera.getPickRay(endPos, look3DEndRay);
angle = 0.0;
Iif (camera.frustum instanceof OrthographicFrustum) {
start = startRay.origin;
end = endRay.origin;
Cartesian3.add(camera.direction, start, start);
Cartesian3.add(camera.direction, end, end);
Cartesian3.subtract(start, camera.position, start);
Cartesian3.subtract(end, camera.position, end);
Cartesian3.normalize(start, start);
Cartesian3.normalize(end, end);
} else {
start = startRay.direction;
end = endRay.direction;
}
dot = Cartesian3.dot(start, end);
Eif (dot < 1.0) {
// dot is in [0, 1]
angle = Math.acos(dot);
}
angle = movement.startPosition.y > movement.endPosition.y ? -angle : angle;
rotationAxis = rotationAxis ?? horizontalRotationAxis;
if (defined(rotationAxis)) {
const direction = camera.direction;
const negativeRotationAxis = Cartesian3.negate(
rotationAxis,
look3DNegativeRot,
);
const northParallel = Cartesian3.equalsEpsilon(
direction,
rotationAxis,
CesiumMath.EPSILON2,
);
const southParallel = Cartesian3.equalsEpsilon(
direction,
negativeRotationAxis,
CesiumMath.EPSILON2,
);
Iif (!northParallel && !southParallel) {
dot = Cartesian3.dot(direction, rotationAxis);
let angleToAxis = CesiumMath.acosClamped(dot);
if (angle > 0 && angle > angleToAxis) {
angle = angleToAxis - CesiumMath.EPSILON4;
}
dot = Cartesian3.dot(direction, negativeRotationAxis);
angleToAxis = CesiumMath.acosClamped(dot);
if (angle < 0 && -angle > angleToAxis) {
angle = -angleToAxis + CesiumMath.EPSILON4;
}
const tangent = Cartesian3.cross(rotationAxis, direction, look3DTan);
camera.look(tangent, angle);
} else Iif ((northParallel && angle < 0) || (southParallel && angle > 0)) {
camera.look(camera.right, -angle);
}
} else {
camera.lookUp(angle);
}
}
function update3D(controller) {
reactToInput(
controller,
controller.enableRotate,
controller.rotateEventTypes,
spin3D,
controller.inertiaSpin,
"_lastInertiaSpinMovement",
);
reactToInput(
controller,
controller.enableZoom,
controller.zoomEventTypes,
zoom3D,
controller.inertiaZoom,
"_lastInertiaZoomMovement",
);
reactToInput(
controller,
controller.enableTilt,
controller.tiltEventTypes,
tilt3D,
controller.inertiaSpin,
"_lastInertiaTiltMovement",
);
reactToInput(
controller,
controller.enableLook,
controller.lookEventTypes,
look3D,
);
}
const scratchAdjustHeightTransform = new Matrix4();
const scratchAdjustHeightCartographic = new Cartographic();
function adjustHeightForTerrain(controller, cameraChanged) {
controller._adjustedHeightForTerrain = true;
const scene = controller._scene;
const mode = scene.mode;
if (mode === SceneMode.SCENE2D || mode === SceneMode.MORPHING) {
return;
}
const camera = scene.camera;
const ellipsoid = scene.ellipsoid ?? Ellipsoid.WGS84;
const projection = scene.mapProjection;
let transform;
let mag;
if (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
transform = Matrix4.clone(camera.transform, scratchAdjustHeightTransform);
mag = Cartesian3.magnitude(camera.position);
camera._setTransform(Matrix4.IDENTITY);
}
const cartographic = scratchAdjustHeightCartographic;
if (mode === SceneMode.SCENE3D) {
ellipsoid.cartesianToCartographic(camera.position, cartographic);
} else {
projection.unproject(camera.position, cartographic);
}
let heightUpdated = false;
if (cartographic.height < controller._minimumCollisionTerrainHeight) {
const globeHeight = controller._scene.globeHeight;
if (defined(globeHeight)) {
const height = globeHeight + controller.minimumZoomDistance;
const difference = globeHeight - controller._lastGlobeHeight;
const percentDifference = difference / controller._lastGlobeHeight;
// Unless the camera has been moved by user input, to avoid big jumps during tile loads
// only make height updates when the globe height has been fairly stable across several frames
if (
cartographic.height < height &&
(cameraChanged || Math.abs(percentDifference) <= 0.1)
) {
cartographic.height = height;
if (mode === SceneMode.SCENE3D) {
ellipsoid.cartographicToCartesian(cartographic, camera.position);
} else {
projection.project(cartographic, camera.position);
}
heightUpdated = true;
}
if (cameraChanged || Math.abs(percentDifference) <= 0.1) {
controller._lastGlobeHeight = globeHeight;
} else {
controller._lastGlobeHeight += difference * 0.1;
}
}
}
if (defined(transform)) {
camera._setTransform(transform);
if (heightUpdated) {
Cartesian3.normalize(camera.position, camera.position);
Cartesian3.negate(camera.position, camera.direction);
Cartesian3.multiplyByScalar(
camera.position,
Math.max(mag, controller.minimumZoomDistance),
camera.position,
);
Cartesian3.normalize(camera.direction, camera.direction);
Cartesian3.cross(camera.direction, camera.up, camera.right);
Cartesian3.cross(camera.right, camera.direction, camera.up);
}
}
}
/**
* @private
*/
ScreenSpaceCameraController.prototype.onMap = function () {
const scene = this._scene;
const mode = scene.mode;
const camera = scene.camera;
if (mode === SceneMode.COLUMBUS_VIEW) {
return (
Math.abs(camera.position.x) - this._maxCoord.x < 0 &&
Math.abs(camera.position.y) - this._maxCoord.y < 0
);
}
return true;
};
const scratchPreviousPosition = new Cartesian3();
const scratchPreviousDirection = new Cartesian3();
/**
* @private
*/
ScreenSpaceCameraController.prototype.update = function () {
const scene = this._scene;
const { camera, globe, mode } = scene;
if (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
this._globe = undefined;
this._ellipsoid = Ellipsoid.UNIT_SPHERE;
} else {
this._globe = globe;
this._ellipsoid = scene.ellipsoid ?? Ellipsoid.default;
}
const { verticalExaggeration, verticalExaggerationRelativeHeight } = scene;
this._minimumCollisionTerrainHeight = VerticalExaggeration.getHeight(
this.minimumCollisionTerrainHeight,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
this._minimumPickingTerrainHeight = VerticalExaggeration.getHeight(
this.minimumPickingTerrainHeight,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
this._minimumTrackBallHeight = VerticalExaggeration.getHeight(
this.minimumTrackBallHeight,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
this._cameraUnderground = scene.cameraUnderground && defined(this._globe);
const radius = this._ellipsoid.maximumRadius;
this._rotateFactor = 1.0 / radius;
this._rotateRateRangeAdjustment = radius;
this._adjustedHeightForTerrain = false;
const previousPosition = Cartesian3.clone(
camera.positionWC,
scratchPreviousPosition,
);
const previousDirection = Cartesian3.clone(
camera.directionWC,
scratchPreviousDirection,
);
if (mode === SceneMode.SCENE2D) {
update2D(this);
} else if (mode === SceneMode.COLUMBUS_VIEW) {
this._horizontalRotationAxis = Cartesian3.UNIT_Z;
updateCV(this);
} else if (mode === SceneMode.SCENE3D) {
this._horizontalRotationAxis = undefined;
update3D(this);
}
if (this.enableCollisionDetection && !this._adjustedHeightForTerrain) {
// Adjust the camera height if the camera moved at all (user input or inertia) and an action didn't already adjust the camera height
const cameraChanged =
!Cartesian3.equals(previousPosition, camera.positionWC) ||
!Cartesian3.equals(previousDirection, camera.directionWC);
adjustHeightForTerrain(this, cameraChanged);
}
this._aggregator.reset();
};
/**
* Returns true if this object was destroyed; otherwise, false.
* <br /><br />
* If this object was destroyed, it should not be used; calling any function other than
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception.
*
* @returns {boolean} <code>true</code> if this object was destroyed; otherwise, <code>false</code>.
*
* @see ScreenSpaceCameraController#destroy
*/
ScreenSpaceCameraController.prototype.isDestroyed = function () {
return false;
};
/**
* Removes mouse listeners held by this object.
* <br /><br />
* Once an object is destroyed, it should not be used; calling any function other than
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception. Therefore,
* assign the return value (<code>undefined</code>) to the object as done in the example.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*
*
* @example
* controller = controller && controller.destroy();
*
* @see ScreenSpaceCameraController#isDestroyed
*/
ScreenSpaceCameraController.prototype.destroy = function () {
this._tweens.removeAll();
this._aggregator = this._aggregator && this._aggregator.destroy();
return destroyObject(this);
};
export default ScreenSpaceCameraController;
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