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import Cartesian3 from "../Core/Cartesian3.js";
import Check from "../Core/Check.js";
import ColorGeometryInstanceAttribute from "../Core/ColorGeometryInstanceAttribute.js";
import GeometryInstance from "../Core/GeometryInstance.js";
import CesiumMath from "../Core/Math.js";
import Matrix4 from "../Core/Matrix4.js";
import SphereOutlineGeometry from "../Core/SphereOutlineGeometry.js";
import PerInstanceColorAppearance from "./PerInstanceColorAppearance.js";
import Primitive from "./Primitive.js";
/**
* A tile bounding volume specified as a sphere.
* @alias TileBoundingSphere
* @constructor
*
* @param {Cartesian3} [center=Cartesian3.ZERO] The center of the bounding sphere.
* @param {number} [radius=0.0] The radius of the bounding sphere.
*
* @private
*/
function TileBoundingSphere(center, radius) {
Iif (radius === 0) {
radius = CesiumMath.EPSILON7;
}
this._boundingSphere = new BoundingSphere(center, radius);
}
Object.defineProperties(TileBoundingSphere.prototype, {
/**
* The center of the bounding sphere
*
* @memberof TileBoundingSphere.prototype
*
* @type {Cartesian3}
* @readonly
*/
center: {
get: function () {
return this._boundingSphere.center;
},
},
/**
* The radius of the bounding sphere
*
* @memberof TileBoundingSphere.prototype
*
* @type {number}
* @readonly
*/
radius: {
get: function () {
return this._boundingSphere.radius;
},
},
/**
* The underlying bounding volume
*
* @memberof TileBoundingSphere.prototype
*
* @type {object}
* @readonly
*/
boundingVolume: {
get: function () {
return this._boundingSphere;
},
},
/**
* The underlying bounding sphere
*
* @memberof TileBoundingSphere.prototype
*
* @type {BoundingSphere}
* @readonly
*/
boundingSphere: {
get: function () {
return this._boundingSphere;
},
},
});
/**
* Computes the distance between this bounding sphere and the camera attached to frameState.
*
* @param {FrameState} frameState The frameState to which the camera is attached.
* @returns {number} The distance between the camera and the bounding sphere in meters. Returns 0 if the camera is inside the bounding volume.
*
*/
TileBoundingSphere.prototype.distanceToCamera = function (frameState) {
//>>includeStart('debug', pragmas.debug);
Check.defined("frameState", frameState);
//>>includeEnd('debug');
const boundingSphere = this._boundingSphere;
return Math.max(
0.0,
Cartesian3.distance(boundingSphere.center, frameState.camera.positionWC) -
boundingSphere.radius,
);
};
/**
* Determines which side of a plane this sphere is located.
*
* @param {Plane} plane The plane to test against.
* @returns {Intersect} {@link Intersect.INSIDE} if the entire sphere is on the side of the plane
* the normal is pointing, {@link Intersect.OUTSIDE} if the entire sphere is
* on the opposite side, and {@link Intersect.INTERSECTING} if the sphere
* intersects the plane.
*/
TileBoundingSphere.prototype.intersectPlane = function (plane) {
//>>includeStart('debug', pragmas.debug);
Check.defined("plane", plane);
//>>includeEnd('debug');
return BoundingSphere.intersectPlane(this._boundingSphere, plane);
};
/**
* Update the bounding sphere after the tile is transformed.
*
* @param {Cartesian3} center The center of the bounding sphere.
* @param {number} radius The radius of the bounding sphere.
*/
TileBoundingSphere.prototype.update = function (center, radius) {
Cartesian3.clone(center, this._boundingSphere.center);
this._boundingSphere.radius = radius;
};
/**
* Creates a debug primitive that shows the outline of the sphere.
*
* @param {Color} color The desired color of the primitive's mesh
* @return {Primitive}
*/
TileBoundingSphere.prototype.createDebugVolume = function (color) {
//>>includeStart('debug', pragmas.debug);
Check.defined("color", color);
//>>includeEnd('debug');
const geometry = new SphereOutlineGeometry({
radius: this.radius,
});
const modelMatrix = Matrix4.fromTranslation(
this.center,
new Matrix4.clone(Matrix4.IDENTITY),
);
const instance = new GeometryInstance({
geometry: geometry,
id: "outline",
modelMatrix: modelMatrix,
attributes: {
color: ColorGeometryInstanceAttribute.fromColor(color),
},
});
return new Primitive({
geometryInstances: instance,
appearance: new PerInstanceColorAppearance({
translucent: false,
flat: true,
}),
asynchronous: false,
});
};
export default TileBoundingSphere;
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