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69x 69x 16x 16x 16x 1x 52x 1x 34x 34x 10x 34x 34x 10x 34x 34x 34x 34x 34x 1x 1x 1x 16x 16x 16x 16x 16x 16x 16x 16x 16x 128x 16x 128x 128x 128x 128x 128x 128x 128x 128x 16x 16x 16x 16x 16x 16x 1x 1x 1x 1x 1x 1x 1x 27x 2x 2x 2x 2x 2x 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 | import buildVoxelDrawCommands from "./buildVoxelDrawCommands.js";
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 Cesium3DTilesetStatistics from "./Cesium3DTilesetStatistics.js";
import CesiumMath from "../Core/Math.js";
import Check from "../Core/Check.js";
import Color from "../Core/Color.js";
import ClippingPlaneCollection from "./ClippingPlaneCollection.js";
import clone from "../Core/clone.js";
import CustomShader from "./Model/CustomShader.js";
import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import destroyObject from "../Core/destroyObject.js";
import Ellipsoid from "../Core/Ellipsoid.js";
import Event from "../Core/Event.js";
import JulianDate from "../Core/JulianDate.js";
import Material from "./Material.js";
import Matrix3 from "../Core/Matrix3.js";
import Matrix4 from "../Core/Matrix4.js";
import MetadataComponentType from "./MetadataComponentType.js";
import MetadataType from "./MetadataType.js";
import oneTimeWarning from "../Core/oneTimeWarning.js";
import PolylineCollection from "./PolylineCollection.js";
import VerticalExaggeration from "../Core/VerticalExaggeration.js";
import VoxelContent from "./VoxelContent.js";
import VoxelShapeType from "./VoxelShapeType.js";
import VoxelTraversal from "./VoxelTraversal.js";
import VoxelMetadataOrder from "./VoxelMetadataOrder.js";
/**
* A primitive that renders voxel data from a {@link VoxelProvider}.
*
* @alias VoxelPrimitive
* @constructor
*
* @param {object} [options] Object with the following properties:
* @param {VoxelProvider} [options.provider] The voxel provider that supplies the primitive with tile data.
* @param {Matrix4} [options.modelMatrix=Matrix4.IDENTITY] The model matrix used to transform the primitive.
* @param {CustomShader} [options.customShader] The custom shader used to style the primitive.
* @param {Clock} [options.clock] The clock used to control time dynamic behavior.
* @param {boolean} [options.calculateStatistics] Generate statistics for performance profile.
*
* @see VoxelProvider
* @see Cesium3DTilesVoxelProvider
* @see VoxelShapeType
* @see {@link https://github.com/CesiumGS/cesium/tree/main/Documentation/CustomShaderGuide|Custom Shader Guide}
*
* @experimental This feature is not final and is subject to change without Cesium's standard deprecation policy.
*/
function VoxelPrimitive(options) {
options = options ?? Frozen.EMPTY_OBJECT;
/**
* @type {boolean}
* @private
*/
this._ready = false;
/**
* @type {VoxelProvider}
* @private
*/
this._provider = options.provider ?? VoxelPrimitive.DefaultProvider;
/**
* This member is not created until the provider and shape are ready.
*
* @type {VoxelTraversal}
* @private
*/
this._traversal = undefined;
/**
* @type {Cesium3DTilesetStatistics}
* @private
*/
this._statistics = new Cesium3DTilesetStatistics();
/**
* @type {boolean}
* @private
*/
this._calculateStatistics = options.calculateStatistics ?? false;
/**
* This member is not created until the provider is ready.
*
* @type {VoxelShape}
* @private
*/
this._shape = undefined;
/**
* @type {boolean}
* @private
*/
this._shapeVisible = false;
/**
* This member is not created until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._dimensions = new Cartesian3();
/**
* This member is not created until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._inputDimensions = new Cartesian3();
/**
* This member is not created until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._paddingBefore = new Cartesian3();
/**
* This member is not created until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._paddingAfter = new Cartesian3();
/**
* This member is not known until the provider is ready.
*
* @type {number}
* @private
*/
this._availableLevels = 1;
/**
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._minBounds = new Cartesian3();
/**
* Used to detect if the shape is dirty.
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._minBoundsOld = new Cartesian3();
/**
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._maxBounds = new Cartesian3();
/**
* Used to detect if the shape is dirty.
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._maxBoundsOld = new Cartesian3();
/**
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._minClippingBounds = new Cartesian3();
/**
* Used to detect if the clipping is dirty.
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._minClippingBoundsOld = new Cartesian3();
/**
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._maxClippingBounds = new Cartesian3();
/**
* Used to detect if the clipping is dirty.
* This member is not known until the provider is ready.
*
* @type {Cartesian3}
* @private
*/
this._maxClippingBoundsOld = new Cartesian3();
/**
* Vertical exaggeration applied to the voxel shape
*
* @type {number}
* @private
*/
this._verticalExaggeration = 1.0;
/**
* The height relative to which the shape is exaggerated.
*
* @type {number}
* @private
*/
this._verticalExaggerationRelativeHeight = 0.0;
/**
* Clipping planes on the primitive
*
* @type {ClippingPlaneCollection}
* @private
*/
this._clippingPlanes = undefined;
/**
* Keeps track of when the clipping planes change
*
* @type {number}
* @private
*/
this._clippingPlanesState = 0;
/**
* Keeps track of when the clipping planes are enabled / disabled
*
* @type {boolean}
* @private
*/
this._clippingPlanesEnabled = false;
/**
* The primitive's model matrix.
*
* @type {Matrix4}
* @private
*/
this._modelMatrix = Matrix4.clone(options.modelMatrix ?? Matrix4.IDENTITY);
/**
* Used to detect if the model matrix is dirty.
*
* @type {Matrix4}
* @private
*/
this._modelMatrixOld = Matrix4.clone(this._modelMatrix);
/**
* @type {CustomShader}
* @private
*/
this._customShader =
options.customShader ?? VoxelPrimitive.DefaultCustomShader;
/**
* @type {Event}
* @private
*/
this._customShaderCompilationEvent = new Event();
/**
* @type {boolean}
* @private
*/
this._shaderDirty = true;
/**
* @type {DrawCommand}
* @private
*/
this._drawCommand = undefined;
/**
* @type {DrawCommand}
* @private
*/
this._drawCommandPick = undefined;
/**
* @type {object}
* @private
*/
this._pickId = undefined;
/**
* @type {Clock}
* @private
*/
this._clock = options.clock;
// Transforms and other values that are computed when the shape changes
/**
* @type {Matrix4}
* @private
*/
this._transformPositionLocalToWorld = new Matrix4();
/**
* @type {Matrix4}
* @private
*/
this._transformPositionWorldToLocal = new Matrix4();
/**
* Transforms a plane in Hessian normal form from local space to view space.
* @type {Matrix4}
* @private
*/
this._transformPlaneLocalToView = new Matrix4();
/**
* @type {Matrix3}
* @private
*/
this._transformDirectionWorldToLocal = new Matrix3();
// Rendering
/**
* @type {boolean}
* @private
*/
this._nearestSampling = false;
/**
* @type {number}
* @private
*/
this._levelBlendFactor = 0.0;
/**
* @type {number}
* @private
*/
this._stepSizeMultiplier = 1.0;
/**
* @type {boolean}
* @private
*/
this._depthTest = true;
/**
* @type {boolean}
* @private
*/
this._useLogDepth = undefined;
/**
* @type {number}
* @private
*/
this._screenSpaceError = 4.0; // in pixels
// Debug / statistics
/**
* @type {PolylineCollection}
* @private
*/
this._debugPolylines = new PolylineCollection();
/**
* @type {boolean}
* @private
*/
this._debugDraw = false;
/**
* @type {boolean}
* @private
*/
this._disableRender = false;
/**
* @type {boolean}
* @private
*/
this._disableUpdate = false;
/**
* @type {Object<string, any>}
* @private
*/
this._uniforms = {
octreeInternalNodeTexture: undefined,
octreeInternalNodeTilesPerRow: 0,
octreeInternalNodeTexelSizeUv: new Cartesian2(),
octreeLeafNodeTexture: undefined,
octreeLeafNodeTilesPerRow: 0,
octreeLeafNodeTexelSizeUv: new Cartesian2(),
megatextureTextures: [],
megatextureSliceDimensions: new Cartesian2(),
megatextureTileDimensions: new Cartesian2(),
megatextureVoxelSizeUv: new Cartesian2(),
megatextureSliceSizeUv: new Cartesian2(),
megatextureTileSizeUv: new Cartesian2(),
dimensions: new Cartesian3(),
inputDimensions: new Cartesian3(),
paddingBefore: new Cartesian3(),
paddingAfter: new Cartesian3(),
transformPositionViewToLocal: new Matrix4(),
transformDirectionViewToLocal: new Matrix3(),
cameraPositionLocal: new Cartesian3(),
cameraDirectionLocal: new Cartesian3(),
cameraTileCoordinates: new Cartesian4(),
cameraTileUv: new Cartesian3(),
ndcSpaceAxisAlignedBoundingBox: new Cartesian4(),
clippingPlanesTexture: undefined,
clippingPlanesMatrix: new Matrix4(),
renderBoundPlanesTexture: undefined,
stepSize: 0,
pickColor: new Color(),
};
/**
* Shape specific shader defines from the previous shape update. Used to detect if the shader needs to be rebuilt.
* @type {Object<string, any>}
* @private
*/
this._shapeDefinesOld = {};
/**
* Map uniform names to functions that return the uniform values.
* @type {Object<string, function():any>}
* @private
*/
this._uniformMap = {};
const uniforms = this._uniforms;
const uniformMap = this._uniformMap;
for (const key in uniforms) {
Eif (uniforms.hasOwnProperty(key)) {
const name = `u_${key}`;
uniformMap[name] = function () {
return uniforms[key];
};
}
}
/**
* The event fired to indicate that a tile's content was loaded.
* <p>
* This event is fired during the tileset traversal while the frame is being rendered
* so that updates to the tile take effect in the same frame. Do not create or modify
* Cesium entities or primitives during the event listener.
* </p>
*
* @type {Event}
*
* @example
* voxelPrimitive.tileLoad.addEventListener(function() {
* console.log('A tile was loaded.');
* });
*/
this.tileLoad = new Event();
/**
* This event fires once for each visible tile in a frame.
* <p>
* This event is fired during the traversal while the frame is being rendered.
*
* @type {Event}
*
* @example
* voxelPrimitive.tileVisible.addEventListener(function() {
* console.log('A tile is visible.');
* });
*
*/
this.tileVisible = new Event();
/**
* The event fired to indicate that a tile's content failed to load.
*
* @type {Event}
*
* @example
* voxelPrimitive.tileFailed.addEventListener(function() {
* console.log('An error occurred loading tile.');
* });
*/
this.tileFailed = new Event();
/**
* The event fired to indicate that a tile's content was unloaded.
*
* @type {Event}
*
* @example
* voxelPrimitive.tileUnload.addEventListener(function() {
* console.log('A tile was unloaded from the cache.');
* });
*
*/
this.tileUnload = new Event();
/**
* The event fired to indicate progress of loading new tiles. This event is fired when a new tile
* is requested, when a requested tile is finished downloading, and when a downloaded tile has been
* processed and is ready to render.
* <p>
* The number of pending tile requests, <code>numberOfPendingRequests</code>, and number of tiles
* processing, <code>numberOfTilesProcessing</code> are passed to the event listener.
* </p>
* <p>
* This event is fired at the end of the frame after the scene is rendered.
* </p>
*
* @type {Event}
*
* @example
* voxelPrimitive.loadProgress.addEventListener(function(numberOfPendingRequests, numberOfTilesProcessing) {
* if ((numberOfPendingRequests === 0) && (numberOfTilesProcessing === 0)) {
* console.log('Finished loading');
* return;
* }
*
* console.log(`Loading: requests: ${numberOfPendingRequests}, processing: ${numberOfTilesProcessing}`);
* });
*/
this.loadProgress = new Event();
/**
* The event fired to indicate that all tiles that meet the screen space error this frame are loaded. The voxel
* primitive is completely loaded for this view.
* <p>
* This event is fired at the end of the frame after the scene is rendered.
* </p>
*
* @type {Event}
*
* @example
* voxelPrimitive.allTilesLoaded.addEventListener(function() {
* console.log('All tiles are loaded');
* });
*/
this.allTilesLoaded = new Event();
/**
* The event fired to indicate that all tiles that meet the screen space error this frame are loaded. This event
* is fired once when all tiles in the initial view are loaded.
* <p>
* This event is fired at the end of the frame after the scene is rendered.
* </p>
*
* @type {Event}
*
* @example
* voxelPrimitive.initialTilesLoaded.addEventListener(function() {
* console.log('Initial tiles are loaded');
* });
*
* @see Cesium3DTileset#allTilesLoaded
*/
this.initialTilesLoaded = new Event();
// If the provider fails to initialize the primitive will fail too.
const provider = this._provider;
initialize(this, provider);
}
function initialize(primitive, provider) {
// Set the bounds
const {
shape: shapeType,
minBounds = VoxelShapeType.getMinBounds(shapeType),
maxBounds = VoxelShapeType.getMaxBounds(shapeType),
} = provider;
primitive.minBounds = minBounds;
primitive.maxBounds = maxBounds;
primitive.minClippingBounds = minBounds.clone();
primitive.maxClippingBounds = maxBounds.clone();
checkTransformAndBounds(primitive);
// Create the shape object, and update it so it is valid for VoxelTraversal
const ShapeConstructor = VoxelShapeType.getShapeConstructor(shapeType);
primitive._shape = new ShapeConstructor();
primitive._shapeVisible = updateShapeAndTransforms(primitive);
}
Object.defineProperties(VoxelPrimitive.prototype, {
/**
* Gets a value indicating whether or not the primitive is ready for use.
*
* @memberof VoxelPrimitive.prototype
* @type {boolean}
* @readonly
*/
ready: {
get: function () {
return this._ready;
},
},
/**
* Gets the {@link VoxelProvider} associated with this primitive.
*
* @memberof VoxelPrimitive.prototype
* @type {VoxelProvider}
* @readonly
*/
provider: {
get: function () {
return this._provider;
},
},
/**
* Gets the bounding sphere.
*
* @memberof VoxelPrimitive.prototype
* @type {BoundingSphere}
* @readonly
*/
boundingSphere: {
get: function () {
return this._shape.boundingSphere;
},
},
/**
* Gets the oriented bounding box.
*
* @memberof VoxelPrimitive.prototype
* @type {OrientedBoundingBox}
* @readonly
*/
orientedBoundingBox: {
get: function () {
return this._shape.orientedBoundingBox;
},
},
/**
* Gets the model matrix.
*
* @memberof VoxelPrimitive.prototype
* @type {Matrix4}
* @readonly
*/
modelMatrix: {
get: function () {
return this._modelMatrix;
},
set: function (modelMatrix) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.object("modelMatrix", modelMatrix);
//>>includeEnd('debug');
this._modelMatrix = Matrix4.clone(modelMatrix, this._modelMatrix);
},
},
/**
* Gets the shape type.
*
* @memberof VoxelPrimitive.prototype
* @type {VoxelShapeType}
* @readonly
*/
shape: {
get: function () {
return this._provider.shape;
},
},
/**
* Gets the dimensions of each voxel tile, in z-up orientation.
* Does not include padding.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
* @readonly
*/
dimensions: {
get: function () {
return this._dimensions;
},
},
/**
* Gets the dimensions of one tile of the input voxel data, in the input orientation.
* Includes padding.
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
* @readonly
*/
inputDimensions: {
get: function () {
return this._inputDimensions;
},
},
/**
* Gets the padding before the voxel data.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
* @readonly
*/
paddingBefore: {
get: function () {
return this._paddingBefore;
},
},
/**
* Gets the padding after the voxel data.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
* @readonly
*/
paddingAfter: {
get: function () {
return this._paddingAfter;
},
},
/**
* Gets the minimum value per channel of the voxel data.
*
* @memberof VoxelPrimitive.prototype
* @type {number[][]}
* @readonly
*/
minimumValues: {
get: function () {
return this._provider.minimumValues;
},
},
/**
* Gets the maximum value per channel of the voxel data.
*
* @memberof VoxelPrimitive.prototype
* @type {number[][]}
* @readonly
*/
maximumValues: {
get: function () {
return this._provider.maximumValues;
},
},
/**
* Gets or sets whether or not this primitive should be displayed.
*
* @memberof VoxelPrimitive.prototype
* @type {boolean}
*/
show: {
get: function () {
return !this._disableRender;
},
set: function (show) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.bool("show", show);
//>>includeEnd('debug');
this._disableRender = !show;
},
},
/**
* Gets or sets whether or not the primitive should update when the view changes.
*
* @memberof VoxelPrimitive.prototype
* @type {boolean}
*/
disableUpdate: {
get: function () {
return this._disableUpdate;
},
set: function (disableUpdate) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.bool("disableUpdate", disableUpdate);
//>>includeEnd('debug');
this._disableUpdate = disableUpdate;
},
},
/**
* Gets or sets whether or not to render debug visualizations.
*
* @memberof VoxelPrimitive.prototype
* @type {boolean}
*/
debugDraw: {
get: function () {
return this._debugDraw;
},
set: function (debugDraw) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.bool("debugDraw", debugDraw);
//>>includeEnd('debug');
this._debugDraw = debugDraw;
},
},
/**
* Gets or sets whether or not to test against depth when rendering.
*
* @memberof VoxelPrimitive.prototype
* @type {boolean}
*/
depthTest: {
get: function () {
return this._depthTest;
},
set: function (depthTest) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.bool("depthTest", depthTest);
//>>includeEnd('debug');
Eif (this._depthTest !== depthTest) {
this._depthTest = depthTest;
this._shaderDirty = true;
}
},
},
/**
* Gets or sets the nearest sampling.
*
* @memberof VoxelPrimitive.prototype
* @type {boolean}
*/
nearestSampling: {
get: function () {
return this._nearestSampling;
},
set: function (nearestSampling) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.bool("nearestSampling", nearestSampling);
//>>includeEnd('debug');
Eif (this._nearestSampling !== nearestSampling) {
this._nearestSampling = nearestSampling;
this._shaderDirty = true;
}
},
},
/**
* Controls how quickly to blend between different levels of the tree.
* 0.0 means an instantaneous pop.
* 1.0 means a full linear blend.
*
* @memberof VoxelPrimitive.prototype
* @type {number}
* @private
*/
levelBlendFactor: {
get: function () {
return this._levelBlendFactor;
},
set: function (levelBlendFactor) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.number("levelBlendFactor", levelBlendFactor);
//>>includeEnd('debug');
this._levelBlendFactor = CesiumMath.clamp(levelBlendFactor, 0.0, 1.0);
},
},
/**
* Gets or sets the screen space error in pixels. If the screen space size
* of a voxel is greater than the screen space error, the tile is subdivided.
* Lower screen space error corresponds with higher detail rendering, but could
* result in worse performance and higher memory consumption.
*
* @memberof VoxelPrimitive.prototype
* @type {number}
*/
screenSpaceError: {
get: function () {
return this._screenSpaceError;
},
set: function (screenSpaceError) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.number("screenSpaceError", screenSpaceError);
//>>includeEnd('debug');
this._screenSpaceError = screenSpaceError;
},
},
/**
* Gets or sets the step size multiplier used during raymarching.
* The lower the value, the higher the rendering quality, but
* also the worse the performance.
*
* @memberof VoxelPrimitive.prototype
* @type {number}
*/
stepSize: {
get: function () {
return this._stepSizeMultiplier;
},
set: function (stepSize) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.number("stepSize", stepSize);
//>>includeEnd('debug');
this._stepSizeMultiplier = stepSize;
},
},
/**
* Gets or sets the minimum bounds in the shape's local coordinate system.
* Voxel data is stretched or squashed to fit the bounds.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
*/
minBounds: {
get: function () {
return this._minBounds;
},
set: function (minBounds) {
//>>includeStart('debug', pragmas.debug);
Check.defined("minBounds", minBounds);
//>>includeEnd('debug');
this._minBounds = Cartesian3.clone(minBounds, this._minBounds);
},
},
/**
* Gets or sets the maximum bounds in the shape's local coordinate system.
* Voxel data is stretched or squashed to fit the bounds.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
*/
maxBounds: {
get: function () {
return this._maxBounds;
},
set: function (maxBounds) {
//>>includeStart('debug', pragmas.debug);
Check.defined("maxBounds", maxBounds);
//>>includeEnd('debug');
this._maxBounds = Cartesian3.clone(maxBounds, this._maxBounds);
},
},
/**
* Gets or sets the minimum clipping location in the shape's local coordinate system.
* Any voxel content outside the range is clipped.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
*/
minClippingBounds: {
get: function () {
return this._minClippingBounds;
},
set: function (minClippingBounds) {
//>>includeStart('debug', pragmas.debug);
Check.defined("minClippingBounds", minClippingBounds);
//>>includeEnd('debug');
this._minClippingBounds = Cartesian3.clone(
minClippingBounds,
this._minClippingBounds,
);
},
},
/**
* Gets or sets the maximum clipping location in the shape's local coordinate system.
* Any voxel content outside the range is clipped.
*
* @memberof VoxelPrimitive.prototype
* @type {Cartesian3}
*/
maxClippingBounds: {
get: function () {
return this._maxClippingBounds;
},
set: function (maxClippingBounds) {
//>>includeStart('debug', pragmas.debug);
Check.defined("maxClippingBounds", maxClippingBounds);
//>>includeEnd('debug');
this._maxClippingBounds = Cartesian3.clone(
maxClippingBounds,
this._maxClippingBounds,
);
},
},
/**
* The {@link ClippingPlaneCollection} used to selectively disable rendering the primitive.
*
* @memberof VoxelPrimitive.prototype
* @type {ClippingPlaneCollection}
*/
clippingPlanes: {
get: function () {
return this._clippingPlanes;
},
set: function (clippingPlanes) {
// Don't need to check if undefined, it's handled in the setOwner function
ClippingPlaneCollection.setOwner(clippingPlanes, this, "_clippingPlanes");
},
},
/**
* Gets or sets the custom shader. If undefined, {@link VoxelPrimitive.DefaultCustomShader} is set.
*
* @memberof VoxelPrimitive.prototype
* @type {CustomShader}
* @see {@link https://github.com/CesiumGS/cesium/tree/main/Documentation/CustomShaderGuide|Custom Shader Guide}
*/
customShader: {
get: function () {
return this._customShader;
},
set: function (customShader) {
Eif (this._customShader !== customShader) {
// Delete old custom shader entries from the uniform map
const uniformMap = this._uniformMap;
const oldCustomShader = this._customShader;
const oldCustomShaderUniformMap = oldCustomShader.uniformMap;
for (const uniformName in oldCustomShaderUniformMap) {
if (oldCustomShaderUniformMap.hasOwnProperty(uniformName)) {
// If the custom shader was set but the voxel shader was never
// built, the custom shader uniforms wouldn't have been added to
// the uniform map. But it doesn't matter because the delete
// operator ignores if the key doesn't exist.
delete uniformMap[uniformName];
}
}
if (!defined(customShader)) {
this._customShader = VoxelPrimitive.DefaultCustomShader;
} else {
this._customShader = customShader;
}
this._shaderDirty = true;
}
},
},
/**
* Gets an event that is raised whenever a custom shader is compiled.
*
* @memberof VoxelPrimitive.prototype
* @type {Event}
* @readonly
*/
customShaderCompilationEvent: {
get: function () {
return this._customShaderCompilationEvent;
},
},
/**
* Loading and rendering information for requested content
* To use `visited` and `numberOfTilesWithContentReady` statistics, set options._calculateStatistics` to `true` in the constructor.
* @type {Cesium3DTilesetStatistics}
* @readonly
* @private
*/
statistics: {
get: function () {
return this._statistics;
},
},
});
const scratchIntersect = new Cartesian4();
const scratchNdcAabb = new Cartesian4();
const scratchTransformPositionLocalToWorld = new Matrix4();
const scratchTransformPositionLocalToProjection = new Matrix4();
const scratchCameraPositionShapeUv = new Cartesian3();
const scratchCameraTileCoordinates = new Cartesian4();
/**
* Updates the voxel primitive.
*
* @param {FrameState} frameState
* @private
*/
VoxelPrimitive.prototype.update = function (frameState) {
const provider = this._provider;
const uniforms = this._uniforms;
// Update the custom shader in case it has texture uniforms.
this._customShader.update(frameState);
// Initialize from the ready provider. This only happens once.
const context = frameState.context;
if (!this._ready) {
initFromProvider(this, provider, context);
// Set the primitive as ready after the first frame render since the user might set up events subscribed to
// the post render event, and the primitive may not be ready for those past the first frame.
frameState.afterRender.push(() => {
this._ready = true;
return true;
});
// Don't render until the next frame after ready is set to true
return;
}
// Check if the shape is dirty before updating it. This needs to happen every
// frame because the member variables can be modified externally via the
// getters.
const shapeDirty = checkTransformAndBounds(this);
const exaggerationChanged = updateVerticalExaggeration(this, frameState);
if (shapeDirty || exaggerationChanged) {
this._shapeVisible = updateShapeAndTransforms(this);
Iif (checkShapeDefines(this)) {
this._shaderDirty = true;
}
}
if (!this._shapeVisible) {
return;
}
this._shape.updateViewTransforms(frameState);
// Update the traversal and prepare for rendering.
const keyframeLocation = getKeyframeLocation(
provider.timeIntervalCollection,
this._clock,
);
const traversal = this._traversal;
const sampleCountOld = traversal._sampleCount;
traversal.update(
frameState,
keyframeLocation,
shapeDirty, // recomputeBoundingVolumes
this._disableUpdate, // pauseUpdate
);
if (sampleCountOld !== traversal._sampleCount) {
this._shaderDirty = true;
}
if (!traversal.isRenderable(traversal.rootNode)) {
return;
}
if (this._debugDraw) {
// Debug draw bounding boxes and other things. Must go after traversal update
// because that's what updates the tile bounding boxes.
debugDraw(this, frameState);
}
Iif (this._disableRender) {
return;
}
// Check if log depth changed
if (this._useLogDepth !== frameState.useLogDepth) {
this._useLogDepth = frameState.useLogDepth;
this._shaderDirty = true;
}
// Check if clipping planes changed
const clippingPlanesChanged = updateClippingPlanes(this, frameState);
Iif (clippingPlanesChanged) {
this._shaderDirty = true;
}
const leafNodeTexture = traversal.leafNodeTexture;
if (defined(leafNodeTexture)) {
uniforms.octreeLeafNodeTexture = traversal.leafNodeTexture;
uniforms.octreeLeafNodeTexelSizeUv = Cartesian2.clone(
traversal.leafNodeTexelSizeUv,
uniforms.octreeLeafNodeTexelSizeUv,
);
uniforms.octreeLeafNodeTilesPerRow = traversal.leafNodeTilesPerRow;
}
// Rebuild shaders
if (this._shaderDirty) {
buildVoxelDrawCommands(this, context);
this._shaderDirty = false;
}
// Calculate the NDC-space AABB to "scissor" the fullscreen quad
const transformPositionWorldToProjection =
context.uniformState.viewProjection;
const { orientedBoundingBox } = this._shape;
const ndcAabb = orientedBoundingBoxToNdcAabb(
orientedBoundingBox,
transformPositionWorldToProjection,
scratchNdcAabb,
);
// If the object is offscreen, don't render it.
const offscreen =
ndcAabb.x === +1.0 ||
ndcAabb.y === +1.0 ||
ndcAabb.z === -1.0 ||
ndcAabb.w === -1.0;
Iif (offscreen) {
return;
}
// Prepare to render: update uniforms that can change every frame
// Using a uniform instead of going through RenderState's scissor because the viewport is not accessible here, and the scissor command needs pixel coordinates.
uniforms.ndcSpaceAxisAlignedBoundingBox = Cartesian4.clone(
ndcAabb,
uniforms.ndcSpaceAxisAlignedBoundingBox,
);
const transformPositionViewToWorld = context.uniformState.inverseView;
const transformPositionViewToLocal = Matrix4.multiplyTransformation(
this._transformPositionWorldToLocal,
transformPositionViewToWorld,
uniforms.transformPositionViewToLocal,
);
this._transformPlaneLocalToView = Matrix4.transpose(
transformPositionViewToLocal,
this._transformPlaneLocalToView,
);
const transformDirectionViewToWorld =
context.uniformState.inverseViewRotation;
uniforms.transformDirectionViewToLocal = Matrix3.multiply(
this._transformDirectionWorldToLocal,
transformDirectionViewToWorld,
uniforms.transformDirectionViewToLocal,
);
uniforms.cameraPositionLocal = Matrix4.multiplyByPoint(
this._transformPositionWorldToLocal,
frameState.camera.positionWC,
uniforms.cameraPositionLocal,
);
uniforms.cameraDirectionLocal = Matrix3.multiplyByVector(
this._transformDirectionWorldToLocal,
frameState.camera.directionWC,
uniforms.cameraDirectionLocal,
);
const cameraTileCoordinates = getTileCoordinates(
this,
uniforms.cameraPositionLocal,
scratchCameraTileCoordinates,
);
uniforms.cameraTileCoordinates = Cartesian4.fromElements(
Math.floor(cameraTileCoordinates.x),
Math.floor(cameraTileCoordinates.y),
Math.floor(cameraTileCoordinates.z),
cameraTileCoordinates.w,
uniforms.cameraTileCoordinates,
);
uniforms.cameraTileUv = Cartesian3.fromElements(
cameraTileCoordinates.x - Math.floor(cameraTileCoordinates.x),
cameraTileCoordinates.y - Math.floor(cameraTileCoordinates.y),
cameraTileCoordinates.z - Math.floor(cameraTileCoordinates.z),
uniforms.cameraTileUv,
);
uniforms.stepSize = this._stepSizeMultiplier;
updateRenderBoundPlanes(this, frameState);
// Render the primitive
const command = frameState.passes.pick
? this._drawCommandPick
: frameState.passes.pickVoxel
? this._drawCommandPickVoxel
: this._drawCommand;
command.boundingVolume = this._shape.boundingSphere;
frameState.commandList.push(command);
};
function updateRenderBoundPlanes(primitive, frameState) {
const uniforms = primitive._uniforms;
const { renderBoundPlanes } = primitive._shape;
if (!defined(renderBoundPlanes)) {
return;
}
renderBoundPlanes.update(frameState, primitive._transformPlaneLocalToView);
uniforms.renderBoundPlanesTexture = renderBoundPlanes.texture;
}
/**
* Converts a position in local space to tile coordinates.
*
* @param {VoxelPrimitive} primitive The primitive to get the tile coordinates for.
* @param {Cartesian3} positionLocal The position in local space to convert to tile coordinates.
* @param {Cartesian4} result The result object to store the tile coordinates.
* @returns {Cartesian4} The tile coordinates of the supplied position.
* @private
*/
function getTileCoordinates(primitive, positionLocal, result) {
const shapeUv = primitive._shape.convertLocalToShapeUvSpace(
positionLocal,
scratchCameraPositionShapeUv,
);
const availableLevels = primitive._availableLevels;
const numTiles = 2 ** (availableLevels - 1);
return Cartesian4.fromElements(
shapeUv.x * numTiles,
shapeUv.y * numTiles,
shapeUv.z * numTiles,
availableLevels - 1,
result,
);
}
const scratchExaggerationScale = new Cartesian3();
const scratchExaggerationCenter = new Cartesian3();
const scratchCartographicCenter = new Cartographic();
/**
* Check for changes in the vertical exaggeration of the primitive
* @param {VoxelPrimitive} primitive The primitive to update
* @param {FrameState} frameState The current frame state
* @returns {boolean} <code>true</code> if the exaggeration was changed
* @private
*/
function updateVerticalExaggeration(primitive, frameState) {
const { verticalExaggeration, verticalExaggerationRelativeHeight } =
frameState;
if (
primitive._verticalExaggeration === verticalExaggeration &&
primitive._verticalExaggerationRelativeHeight ===
verticalExaggerationRelativeHeight
) {
return false;
}
primitive._verticalExaggeration = verticalExaggeration;
primitive._verticalExaggerationRelativeHeight =
verticalExaggerationRelativeHeight;
return true;
}
/**
* Initialize primitive properties that are derived from the voxel provider
* @param {VoxelPrimitive} primitive
* @param {VoxelProvider} provider
* @param {Context} context
* @private
*/
function initFromProvider(primitive, provider, context) {
const uniforms = primitive._uniforms;
primitive._pickId = context.createPickId({ primitive });
uniforms.pickColor = Color.clone(primitive._pickId.color, uniforms.pickColor);
const { shaderDefines, shaderUniforms: shapeUniforms } = primitive._shape;
primitive._shapeDefinesOld = clone(shaderDefines, true);
// Add shape uniforms to the uniform map
const uniformMap = primitive._uniformMap;
for (const key in shapeUniforms) {
Eif (shapeUniforms.hasOwnProperty(key)) {
const name = `u_${key}`;
//>>includeStart('debug', pragmas.debug);
Iif (defined(uniformMap[name])) {
oneTimeWarning(
`VoxelPrimitive: Uniform name "${name}" is already defined`,
);
}
//>>includeEnd('debug');
uniformMap[name] = function () {
return shapeUniforms[key];
};
}
}
// Set uniforms that come from the provider.
// Note that minBounds and maxBounds can be set dynamically, so their uniforms aren't set here.
primitive._dimensions = Cartesian3.clone(
provider.dimensions,
primitive._dimensions,
);
uniforms.dimensions = Cartesian3.clone(
primitive._dimensions,
uniforms.dimensions,
);
primitive._paddingBefore = Cartesian3.clone(
provider.paddingBefore ?? Cartesian3.ZERO,
primitive._paddingBefore,
);
uniforms.paddingBefore = Cartesian3.clone(
primitive._paddingBefore,
uniforms.paddingBefore,
);
primitive._paddingAfter = Cartesian3.clone(
provider.paddingAfter ?? Cartesian3.ZERO,
primitive._paddingAfter,
);
uniforms.paddingAfter = Cartesian3.clone(
primitive._paddingAfter,
uniforms.paddingAfter,
);
primitive._inputDimensions = Cartesian3.add(
primitive._dimensions,
primitive._paddingBefore,
primitive._inputDimensions,
);
primitive._inputDimensions = Cartesian3.add(
primitive._inputDimensions,
primitive._paddingAfter,
primitive._inputDimensions,
);
if (provider.metadataOrder === VoxelMetadataOrder.Y_UP) {
const inputDimensionsY = primitive._inputDimensions.y;
primitive._inputDimensions.y = primitive._inputDimensions.z;
primitive._inputDimensions.z = inputDimensionsY;
}
uniforms.inputDimensions = Cartesian3.clone(
primitive._inputDimensions,
uniforms.inputDimensions,
);
primitive._availableLevels = provider.availableLevels ?? 1;
// Create the VoxelTraversal, and set related uniforms
const keyframeCount = provider.keyframeCount ?? 1;
primitive._traversal = new VoxelTraversal(primitive, context, keyframeCount);
primitive.statistics.texturesByteLength =
primitive._traversal.textureMemoryByteLength;
setTraversalUniforms(primitive._traversal, uniforms);
}
/**
* Track changes in provider transform and primitive bounds
* @param {VoxelPrimitive} primitive
* @returns {boolean} Whether any of the transform or bounds changed
* @private
*/
function checkTransformAndBounds(primitive) {
const numChanges =
updateBound(primitive, "_modelMatrix", "_modelMatrixOld") +
updateBound(primitive, "_minBounds", "_minBoundsOld") +
updateBound(primitive, "_maxBounds", "_maxBoundsOld") +
updateBound(primitive, "_minClippingBounds", "_minClippingBoundsOld") +
updateBound(primitive, "_maxClippingBounds", "_maxClippingBoundsOld");
return numChanges > 0;
}
/**
* Compare old and new values of a bound and update the old if it is different.
* @param {VoxelPrimitive} primitive The primitive with bounds properties
* @param {string} newBoundKey A key pointing to a bounds property of type Cartesian3 or Matrix4
* @param {string} oldBoundKey A key pointing to a bounds property of the same type as the property at newBoundKey
* @returns {number} 1 if the bound value changed, 0 otherwise
*
* @private
*/
function updateBound(primitive, newBoundKey, oldBoundKey) {
const newBound = primitive[newBoundKey];
const oldBound = primitive[oldBoundKey];
const changed = !newBound.equals(oldBound);
if (changed) {
newBound.clone(oldBound);
}
return changed ? 1 : 0;
}
const scratchExaggeratedMinBounds = new Cartesian3();
const scratchExaggeratedMaxBounds = new Cartesian3();
const scratchExaggeratedMinClippingBounds = new Cartesian3();
const scratchExaggeratedMaxClippingBounds = new Cartesian3();
const scratchExaggeratedModelMatrix = new Matrix4();
const scratchCompoundModelMatrix = new Matrix4();
/**
* Update the shape and related transforms
* @param {VoxelPrimitive} primitive
* @returns {boolean} True if the shape is visible
* @private
*/
function updateShapeAndTransforms(primitive) {
const verticalExaggeration = primitive._verticalExaggeration;
const verticalExaggerationRelativeHeight =
primitive._verticalExaggerationRelativeHeight;
const exaggeratedMinBounds = Cartesian3.clone(
primitive._minBounds,
scratchExaggeratedMinBounds,
);
const exaggeratedMaxBounds = Cartesian3.clone(
primitive._maxBounds,
scratchExaggeratedMaxBounds,
);
const exaggeratedMinClippingBounds = Cartesian3.clone(
primitive._minClippingBounds,
scratchExaggeratedMinClippingBounds,
);
const exaggeratedMaxClippingBounds = Cartesian3.clone(
primitive._maxClippingBounds,
scratchExaggeratedMaxClippingBounds,
);
const exaggeratedModelMatrix = Matrix4.clone(
primitive._modelMatrix,
scratchExaggeratedModelMatrix,
);
if (primitive.shape === VoxelShapeType.ELLIPSOID) {
// Apply the exaggeration by stretching the height bounds
exaggeratedMinBounds.z = VerticalExaggeration.getHeight(
primitive._minBounds.z,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
exaggeratedMaxBounds.z = VerticalExaggeration.getHeight(
primitive._maxBounds.z,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
exaggeratedMinClippingBounds.z = VerticalExaggeration.getHeight(
primitive._minClippingBounds.z,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
exaggeratedMaxClippingBounds.z = VerticalExaggeration.getHeight(
primitive._maxClippingBounds.z,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
} else {
// Apply the exaggeration via the model matrix
const exaggerationScale = Cartesian3.fromElements(
1.0,
1.0,
verticalExaggeration,
scratchExaggerationScale,
);
Matrix4.multiplyByScale(
exaggeratedModelMatrix,
exaggerationScale,
exaggeratedModelMatrix,
);
Matrix4.multiplyByTranslation(
exaggeratedModelMatrix,
computeBoxExaggerationTranslation(primitive),
exaggeratedModelMatrix,
);
}
const provider = primitive._provider;
const shapeTransform = provider.shapeTransform ?? Matrix4.IDENTITY;
const globalTransform = provider.globalTransform ?? Matrix4.IDENTITY;
// Compound model matrix = global transform * model matrix * shape transform
const compoundModelMatrix = Matrix4.multiplyTransformation(
globalTransform,
exaggeratedModelMatrix,
scratchCompoundModelMatrix,
);
Matrix4.multiplyTransformation(
compoundModelMatrix,
shapeTransform,
compoundModelMatrix,
);
const shape = primitive._shape;
const visible = shape.update(
compoundModelMatrix,
exaggeratedMinBounds,
exaggeratedMaxBounds,
exaggeratedMinClippingBounds,
exaggeratedMaxClippingBounds,
);
if (!visible) {
return false;
}
primitive._transformPositionLocalToWorld = Matrix4.clone(
shape.shapeTransform,
primitive._transformPositionLocalToWorld,
);
primitive._transformPositionWorldToLocal = Matrix4.inverse(
primitive._transformPositionLocalToWorld,
primitive._transformPositionWorldToLocal,
);
primitive._transformDirectionWorldToLocal = Matrix4.getMatrix3(
primitive._transformPositionWorldToLocal,
primitive._transformDirectionWorldToLocal,
);
return true;
}
const scratchExaggerationTranslation = new Cartesian3();
/**
* Compute the translation to apply to box shapes to account for vertical exaggeration
*
* @param {VoxelPrimitive} primitive
* @returns {Cartesian3} The translation to apply to the box to account for vertical exaggeration
* @private
*/
function computeBoxExaggerationTranslation(primitive) {
const verticalExaggeration = primitive._verticalExaggeration;
const verticalExaggerationRelativeHeight =
primitive._verticalExaggerationRelativeHeight;
// Compute translation based on box center, relative height, and exaggeration
const {
shapeTransform = Matrix4.IDENTITY,
globalTransform = Matrix4.IDENTITY,
} = primitive._provider;
// Find the Cartesian position of the center of the OBB
const initialCenter = Matrix4.getTranslation(
shapeTransform,
scratchExaggerationCenter,
);
const intermediateCenter = Matrix4.multiplyByPoint(
primitive._modelMatrix,
initialCenter,
scratchExaggerationCenter,
);
const transformedCenter = Matrix4.multiplyByPoint(
globalTransform,
intermediateCenter,
scratchExaggerationCenter,
);
// Find the cartographic height
const ellipsoid = Ellipsoid.WGS84;
const centerCartographic = ellipsoid.cartesianToCartographic(
transformedCenter,
scratchCartographicCenter,
);
let centerHeight = 0.0;
Iif (defined(centerCartographic)) {
centerHeight = centerCartographic.height;
}
// Find the shift that will put the center in the right position relative
// to relativeHeight, after it is scaled by verticalExaggeration
const exaggeratedHeight = VerticalExaggeration.getHeight(
centerHeight,
verticalExaggeration,
verticalExaggerationRelativeHeight,
);
return Cartesian3.fromElements(
0.0,
0.0,
(exaggeratedHeight - centerHeight) / verticalExaggeration,
scratchExaggerationTranslation,
);
}
/**
* Set uniforms that come from the traversal.
* @param {VoxelTraversal} traversal
* @param {object} uniforms
* @private
*/
function setTraversalUniforms(traversal, uniforms) {
uniforms.octreeInternalNodeTexture = traversal.internalNodeTexture;
uniforms.octreeInternalNodeTexelSizeUv = Cartesian2.clone(
traversal.internalNodeTexelSizeUv,
uniforms.octreeInternalNodeTexelSizeUv,
);
uniforms.octreeInternalNodeTilesPerRow = traversal.internalNodeTilesPerRow;
const megatextures = traversal.megatextures;
const megatexture = megatextures[0];
const megatextureLength = megatextures.length;
uniforms.megatextureTextures = new Array(megatextureLength);
for (let i = 0; i < megatextureLength; i++) {
uniforms.megatextureTextures[i] = megatextures[i].texture;
}
uniforms.megatextureSliceDimensions = Cartesian2.clone(
megatexture.sliceCountPerRegion,
uniforms.megatextureSliceDimensions,
);
uniforms.megatextureTileDimensions = Cartesian2.clone(
megatexture.regionCountPerMegatexture,
uniforms.megatextureTileDimensions,
);
uniforms.megatextureVoxelSizeUv = Cartesian2.clone(
megatexture.voxelSizeUv,
uniforms.megatextureVoxelSizeUv,
);
uniforms.megatextureSliceSizeUv = Cartesian2.clone(
megatexture.sliceSizeUv,
uniforms.megatextureSliceSizeUv,
);
uniforms.megatextureTileSizeUv = Cartesian2.clone(
megatexture.regionSizeUv,
uniforms.megatextureTileSizeUv,
);
}
/**
* Track changes in shape-related shader defines
* @param {VoxelPrimitive} primitive
* @returns {boolean} True if any of the shape defines changed, requiring a shader rebuild
* @private
*/
function checkShapeDefines(primitive) {
const { shaderDefines } = primitive._shape;
const shapeDefinesChanged = Object.keys(shaderDefines).some(
(key) => shaderDefines[key] !== primitive._shapeDefinesOld[key],
);
Iif (shapeDefinesChanged) {
primitive._shapeDefinesOld = clone(shaderDefines, true);
}
return shapeDefinesChanged;
}
/**
* Find the keyframe location to render at. Doesn't need to be a whole number.
* @param {TimeIntervalCollection} timeIntervalCollection
* @param {Clock} clock
* @returns {number}
*
* @private
*/
function getKeyframeLocation(timeIntervalCollection, clock) {
Eif (!defined(timeIntervalCollection) || !defined(clock)) {
return 0.0;
}
let date = clock.currentTime;
let timeInterval;
let timeIntervalIndex = timeIntervalCollection.indexOf(date);
if (timeIntervalIndex >= 0) {
timeInterval = timeIntervalCollection.get(timeIntervalIndex);
} else {
// Date fell outside the range
timeIntervalIndex = ~timeIntervalIndex;
if (timeIntervalIndex === timeIntervalCollection.length) {
// Date past range
timeIntervalIndex = timeIntervalCollection.length - 1;
timeInterval = timeIntervalCollection.get(timeIntervalIndex);
date = timeInterval.stop;
} else {
// Date before range
timeInterval = timeIntervalCollection.get(timeIntervalIndex);
date = timeInterval.start;
}
}
// De-lerp between the start and end of the interval
const totalSeconds = JulianDate.secondsDifference(
timeInterval.stop,
timeInterval.start,
);
const secondsDifferenceStart = JulianDate.secondsDifference(
date,
timeInterval.start,
);
const t = secondsDifferenceStart / totalSeconds;
return timeIntervalIndex + t;
}
/**
* Update the clipping planes state and associated uniforms
*
* @param {VoxelPrimitive} primitive
* @param {FrameState} frameState
* @returns {boolean} Whether the clipping planes changed, requiring a shader rebuild
* @private
*/
function updateClippingPlanes(primitive, frameState) {
const clippingPlanes = primitive.clippingPlanes;
Eif (!defined(clippingPlanes)) {
return false;
}
clippingPlanes.update(frameState);
const { clippingPlanesState, enabled } = clippingPlanes;
if (enabled) {
const uniforms = primitive._uniforms;
uniforms.clippingPlanesTexture = clippingPlanes.texture;
// Compute the clipping plane's transformation to local space and then take the inverse
// transpose to properly transform the hessian normal form of the plane.
// transpose(inverse(worldToLocal * clippingPlaneLocalToWorld))
// transpose(inverse(clippingPlaneLocalToWorld) * inverse(worldToLocal))
// transpose(inverse(clippingPlaneLocalToWorld) * localToWorld)
uniforms.clippingPlanesMatrix = Matrix4.transpose(
Matrix4.multiplyTransformation(
Matrix4.inverse(
clippingPlanes.modelMatrix,
uniforms.clippingPlanesMatrix,
),
primitive._transformPositionLocalToWorld,
uniforms.clippingPlanesMatrix,
),
uniforms.clippingPlanesMatrix,
);
}
if (
primitive._clippingPlanesState === clippingPlanesState &&
primitive._clippingPlanesEnabled === enabled
) {
return false;
}
primitive._clippingPlanesState = clippingPlanesState;
primitive._clippingPlanesEnabled = enabled;
return true;
}
/**
* 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 VoxelPrimitive#destroy
*/
VoxelPrimitive.prototype.isDestroyed = function () {
return false;
};
/**
* Destroys the WebGL resources held by this object. Destroying an object allows for deterministic
* release of WebGL resources, instead of relying on the garbage collector to destroy 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.
*
* @see VoxelPrimitive#isDestroyed
*
* @example
* voxelPrimitive = voxelPrimitive && voxelPrimitive.destroy();
*/
VoxelPrimitive.prototype.destroy = function () {
const drawCommand = this._drawCommand;
if (defined(drawCommand)) {
drawCommand.shaderProgram =
drawCommand.shaderProgram && drawCommand.shaderProgram.destroy();
}
const drawCommandPick = this._drawCommandPick;
if (defined(drawCommandPick)) {
drawCommandPick.shaderProgram =
drawCommandPick.shaderProgram && drawCommandPick.shaderProgram.destroy();
}
this._pickId = this._pickId && this._pickId.destroy();
this._traversal = this._traversal && this._traversal.destroy();
this.statistics.texturesByteLength = 0;
this._clippingPlanes = this._clippingPlanes && this._clippingPlanes.destroy();
return destroyObject(this);
};
const corners = new Array(
new Cartesian4(-1.0, -1.0, -1.0, 1.0),
new Cartesian4(+1.0, -1.0, -1.0, 1.0),
new Cartesian4(-1.0, +1.0, -1.0, 1.0),
new Cartesian4(+1.0, +1.0, -1.0, 1.0),
new Cartesian4(-1.0, -1.0, +1.0, 1.0),
new Cartesian4(+1.0, -1.0, +1.0, 1.0),
new Cartesian4(-1.0, +1.0, +1.0, 1.0),
new Cartesian4(+1.0, +1.0, +1.0, 1.0),
);
const vertexNeighborIndices = new Array(
1,
2,
4,
0,
3,
5,
0,
3,
6,
1,
2,
7,
0,
5,
6,
1,
4,
7,
2,
4,
7,
3,
5,
6,
);
const scratchCornersClipSpace = new Array(
new Cartesian4(),
new Cartesian4(),
new Cartesian4(),
new Cartesian4(),
new Cartesian4(),
new Cartesian4(),
new Cartesian4(),
new Cartesian4(),
);
/**
* Projects all 8 corners of the oriented bounding box to NDC space and finds the
* resulting NDC axis aligned bounding box. To avoid projecting a vertex that is
* behind the near plane, it uses the intersection point of each of the vertex's
* edges against the near plane as part of the AABB calculation. This is done in
* clip space prior to perspective division.
*
* @function
*
* @param {OrientedBoundingBox} orientedBoundingBox
* @param {Matrix4} worldToProjection
* @param {Cartesian4} result
* @returns {Cartesian4}
*
* @private
*/
function orientedBoundingBoxToNdcAabb(
orientedBoundingBox,
worldToProjection,
result,
) {
const transformPositionLocalToWorld = Matrix4.fromRotationTranslation(
orientedBoundingBox.halfAxes,
orientedBoundingBox.center,
scratchTransformPositionLocalToWorld,
);
const transformPositionLocalToProjection = Matrix4.multiply(
worldToProjection,
transformPositionLocalToWorld,
scratchTransformPositionLocalToProjection,
);
let ndcMinX = +Number.MAX_VALUE;
let ndcMaxX = -Number.MAX_VALUE;
let ndcMinY = +Number.MAX_VALUE;
let ndcMaxY = -Number.MAX_VALUE;
let cornerIndex;
// Convert all points to clip space
const cornersClipSpace = scratchCornersClipSpace;
const cornersLength = corners.length;
for (cornerIndex = 0; cornerIndex < cornersLength; cornerIndex++) {
Matrix4.multiplyByVector(
transformPositionLocalToProjection,
corners[cornerIndex],
cornersClipSpace[cornerIndex],
);
}
for (cornerIndex = 0; cornerIndex < cornersLength; cornerIndex++) {
const position = cornersClipSpace[cornerIndex];
if (position.z >= -position.w) {
// Position is past near plane, so there's no need to clip.
const ndcX = position.x / position.w;
const ndcY = position.y / position.w;
ndcMinX = Math.min(ndcMinX, ndcX);
ndcMaxX = Math.max(ndcMaxX, ndcX);
ndcMinY = Math.min(ndcMinY, ndcY);
ndcMaxY = Math.max(ndcMaxY, ndcY);
} else E{
for (let neighborIndex = 0; neighborIndex < 3; neighborIndex++) {
const neighborVertexIndex =
vertexNeighborIndices[cornerIndex * 3 + neighborIndex];
const neighborPosition = cornersClipSpace[neighborVertexIndex];
if (neighborPosition.z >= -neighborPosition.w) {
// Position is behind the near plane and neighbor is after, so get intersection point on the near plane.
const distanceToPlaneFromPosition = position.z + position.w;
const distanceToPlaneFromNeighbor =
neighborPosition.z + neighborPosition.w;
const t =
distanceToPlaneFromPosition /
(distanceToPlaneFromPosition - distanceToPlaneFromNeighbor);
const intersect = Cartesian4.lerp(
position,
neighborPosition,
t,
scratchIntersect,
);
const intersectNdcX = intersect.x / intersect.w;
const intersectNdcY = intersect.y / intersect.w;
ndcMinX = Math.min(ndcMinX, intersectNdcX);
ndcMaxX = Math.max(ndcMaxX, intersectNdcX);
ndcMinY = Math.min(ndcMinY, intersectNdcY);
ndcMaxY = Math.max(ndcMaxY, intersectNdcY);
}
}
}
}
// Clamp the NDC values to -1 to +1 range even if they extend much further.
ndcMinX = CesiumMath.clamp(ndcMinX, -1.0, +1.0);
ndcMinY = CesiumMath.clamp(ndcMinY, -1.0, +1.0);
ndcMaxX = CesiumMath.clamp(ndcMaxX, -1.0, +1.0);
ndcMaxY = CesiumMath.clamp(ndcMaxY, -1.0, +1.0);
result = Cartesian4.fromElements(ndcMinX, ndcMinY, ndcMaxX, ndcMaxY, result);
return result;
}
const polylineAxisDistance = 30000000.0;
const polylineXAxis = new Cartesian3(polylineAxisDistance, 0.0, 0.0);
const polylineYAxis = new Cartesian3(0.0, polylineAxisDistance, 0.0);
const polylineZAxis = new Cartesian3(0.0, 0.0, polylineAxisDistance);
/**
* Draws the tile bounding boxes and axes.
*
* @function
*
* @param {VoxelPrimitive} that
* @param {FrameState} frameState
*
* @private
*/
function debugDraw(that, frameState) {
const traversal = that._traversal;
const polylines = that._debugPolylines;
polylines.removeAll();
function makePolylineLineSegment(startPos, endPos, color, thickness) {
polylines.add({
positions: [startPos, endPos],
width: thickness,
material: Material.fromType("Color", {
color: color,
}),
});
}
function makePolylineBox(orientedBoundingBox, color, thickness) {
// Normally would want to use a scratch variable to store the corners, but
// polylines don't clone the positions.
const corners = orientedBoundingBox.computeCorners();
makePolylineLineSegment(corners[0], corners[1], color, thickness);
makePolylineLineSegment(corners[2], corners[3], color, thickness);
makePolylineLineSegment(corners[4], corners[5], color, thickness);
makePolylineLineSegment(corners[6], corners[7], color, thickness);
makePolylineLineSegment(corners[0], corners[2], color, thickness);
makePolylineLineSegment(corners[4], corners[6], color, thickness);
makePolylineLineSegment(corners[1], corners[3], color, thickness);
makePolylineLineSegment(corners[5], corners[7], color, thickness);
makePolylineLineSegment(corners[0], corners[4], color, thickness);
makePolylineLineSegment(corners[2], corners[6], color, thickness);
makePolylineLineSegment(corners[1], corners[5], color, thickness);
makePolylineLineSegment(corners[3], corners[7], color, thickness);
}
function drawTile(tile) {
Iif (!traversal.isRenderable(tile)) {
return;
}
const level = tile.level;
const startThickness = 5.0;
const thickness = Math.max(1.0, startThickness / Math.pow(2.0, level));
const colors = [Color.RED, Color.LIME, Color.BLUE];
const color = colors[level % 3];
makePolylineBox(tile.orientedBoundingBox, color, thickness);
Iif (defined(tile.children)) {
for (let i = 0; i < 8; i++) {
drawTile(tile.children[i]);
}
}
}
makePolylineBox(that._shape.orientedBoundingBox, Color.WHITE, 5.0);
drawTile(traversal.rootNode);
const axisThickness = 10.0;
makePolylineLineSegment(
Cartesian3.ZERO,
polylineXAxis,
Color.RED,
axisThickness,
);
makePolylineLineSegment(
Cartesian3.ZERO,
polylineYAxis,
Color.LIME,
axisThickness,
);
makePolylineLineSegment(
Cartesian3.ZERO,
polylineZAxis,
Color.BLUE,
axisThickness,
);
polylines.update(frameState);
}
/**
* The default custom shader used by the primitive.
*
* @type {CustomShader}
* @constant
* @readonly
*
* @private
*/
VoxelPrimitive.DefaultCustomShader = new CustomShader({
fragmentShaderText: `void fragmentMain(FragmentInput fsInput, inout czm_modelMaterial material)
{
material.diffuse = vec3(1.0);
material.alpha = 1.0;
}`,
});
function DefaultVoxelProvider() {
this.ready = true;
this.shape = VoxelShapeType.BOX;
this.dimensions = new Cartesian3(1, 1, 1);
this.names = ["data"];
this.types = [MetadataType.SCALAR];
this.componentTypes = [MetadataComponentType.FLOAT32];
this.maximumTileCount = 1;
}
DefaultVoxelProvider.prototype.requestData = function (options) {
const tileLevel = defined(options) ? (options.tileLevel ?? 0) : 0;
Iif (tileLevel >= 1) {
return undefined;
}
const content = new VoxelContent({ metadata: [new Float32Array(1)] });
return Promise.resolve(content);
};
VoxelPrimitive.DefaultProvider = new DefaultVoxelProvider();
export default VoxelPrimitive;
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