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16x 16x 14x 14x 14x 14x 14x 14x 2x 2x 2x 2x 2x 2x 2x 2x 16x 18x 18x 18x 18x 16x 18x 18x 13x 18x 4x 18x 18x 18x 18x 18x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 18x 40x 40x 40x 40x 40x 40x 40x 40x 33x 33x 40x 1x 50x 50x 1x 49x 49x 49x 3x 48x 48x 48x 48x 48x 48x 48x 48x 28x 20x 16x 48x 1x 48x 8x 40x 18x 40x 1x 49x 1x 47x 47x 47x 47x 47x | import BlendingState from "./BlendingState.js";
import Buffer from "../Renderer/Buffer.js";
import BufferUsage from "../Renderer/BufferUsage.js";
import Cartesian3 from "../Core/Cartesian3.js";
import Check from "../Core/Check.js";
import Color from "../Core/Color.js";
import ComputeCommand from "../Renderer/ComputeCommand.js";
import CloudType from "./CloudType.js";
import CloudCollectionFS from "../Shaders/CloudCollectionFS.js";
import CloudCollectionVS from "../Shaders/CloudCollectionVS.js";
import CloudNoiseFS from "../Shaders/CloudNoiseFS.js";
import CloudNoiseVS from "../Shaders/CloudNoiseVS.js";
import ComponentDatatype from "../Core/ComponentDatatype.js";
import CumulusCloud from "./CumulusCloud.js";
import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import destroyObject from "../Core/destroyObject.js";
import DeveloperError from "../Core/DeveloperError.js";
import DrawCommand from "../Renderer/DrawCommand.js";
import EncodedCartesian3 from "../Core/EncodedCartesian3.js";
import IndexDatatype from "../Core/IndexDatatype.js";
import Pass from "../Renderer/Pass.js";
import PixelDatatype from "../Renderer/PixelDatatype.js";
import PixelFormat from "../Core/PixelFormat.js";
import RenderState from "../Renderer/RenderState.js";
import Sampler from "../Renderer/Sampler.js";
import ShaderSource from "../Renderer/ShaderSource.js";
import ShaderProgram from "../Renderer/ShaderProgram.js";
import Texture from "../Renderer/Texture.js";
import TextureMagnificationFilter from "../Renderer/TextureMagnificationFilter.js";
import TextureMinificationFilter from "../Renderer/TextureMinificationFilter.js";
import TextureWrap from "../Renderer/TextureWrap.js";
import VertexArray from "../Renderer/VertexArray.js";
import VertexArrayFacade from "../Renderer/VertexArrayFacade.js";
import WebGLConstants from "../Core/WebGLConstants.js";
let attributeLocations;
const scratchTextureDimensions = new Cartesian3();
const attributeLocationsBatched = {
positionHighAndScaleX: 0,
positionLowAndScaleY: 1,
packedAttribute0: 2, // show, brightness, direction
packedAttribute1: 3, // cloudSize, slice
color: 4,
};
const attributeLocationsInstanced = {
direction: 0,
positionHighAndScaleX: 1,
positionLowAndScaleY: 2,
packedAttribute0: 3, // show, brightness
packedAttribute1: 4, // cloudSize, slice
color: 5,
};
const SHOW_INDEX = CumulusCloud.SHOW_INDEX;
const POSITION_INDEX = CumulusCloud.POSITION_INDEX;
const SCALE_INDEX = CumulusCloud.SCALE_INDEX;
const MAXIMUM_SIZE_INDEX = CumulusCloud.MAXIMUM_SIZE_INDEX;
const SLICE_INDEX = CumulusCloud.SLICE_INDEX;
const BRIGHTNESS_INDEX = CumulusCloud.BRIGHTNESS_INDEX;
const NUMBER_OF_PROPERTIES = CumulusCloud.NUMBER_OF_PROPERTIES;
const COLOR_INDEX = CumulusCloud.COLOR_INDEX;
/**
* A renderable collection of clouds in the 3D scene.
* <br /><br />
* <div align='center'>
* <img src='Images/CumulusCloud.png' width='400' height='300' /><br />
* Example cumulus clouds
* </div>
* <br /><br />
* Clouds are added and removed from the collection using {@link CloudCollection#add}
* and {@link CloudCollection#remove}.
* @alias CloudCollection
* @constructor
*
* @param {object} [options] Object with the following properties:
* @param {boolean} [options.show=true] Whether to display the clouds.
* @param {number} [options.noiseDetail=16.0] Desired amount of detail in the noise texture.
* @param {number} [options.noiseOffset=Cartesian3.ZERO] Desired translation of data in noise texture.
* @param {boolean} [options.debugBillboards=false] For debugging only. Determines if the billboards are rendered with an opaque color.
* @param {boolean} [options.debugEllipsoids=false] For debugging only. Determines if the clouds will be rendered as opaque ellipsoids.
* @see CloudCollection#add
* @see CloudCollection#remove
* @see CumulusCloud
*
* @demo {@link https://sandcastle.cesium.com/index.html?src=Clouds.html|Cesium Sandcastle Clouds Demo}
* @demo {@link https://sandcastle.cesium.com/index.html?src=Cloud%20Parameters.html|Cesium Sandcastle Cloud Parameters Demo}
*
* @example
* // Create a cloud collection with two cumulus clouds
* const clouds = scene.primitives.add(new Cesium.CloudCollection());
* clouds.add({
* position : new Cesium.Cartesian3(1.0, 2.0, 3.0),
* maximumSize: new Cesium.Cartesian3(20.0, 12.0, 8.0)
* });
* clouds.add({
* position : new Cesium.Cartesian3(4.0, 5.0, 6.0),
* maximumSize: new Cesium.Cartesian3(15.0, 9.0, 9.0),
* slice: 0.5
* });
*
*/
function CloudCollection(options) {
options = options ?? Frozen.EMPTY_OBJECT;
this._clouds = [];
this._cloudsToUpdate = [];
this._cloudsToUpdateIndex = 0;
this._cloudsRemoved = false;
this._createVertexArray = false;
this._propertiesChanged = new Uint32Array(NUMBER_OF_PROPERTIES);
this._noiseTexture = undefined;
this._textureSliceWidth = 128;
this._noiseTextureRows = 4;
/**
* <p>
* Controls the amount of detail captured in the precomputed noise texture
* used to render the cumulus clouds. In order for the texture to be tileable,
* this must be a power of two. For best results, set this to be a power of two
* between <code>8.0</code> and <code>32.0</code> (inclusive).
* </p>
*
* <div align='center'>
* <table border='0' cellpadding='5'><tr>
* <td align='center'>
* <code>clouds.noiseDetail = 8.0;</code><br/>
* <img src='Images/CloudCollection.noiseDetail8.png' width='250' height='158' />
* </td>
* <td align='center'>
* <code>clouds.noiseDetail = 32.0;</code><br/>
* <img src='Images/CloudCollection.noiseDetail32.png' width='250' height='158' />
* </td>
* </tr></table>
* </div>
*
* @type {number}
*
* @default 16.0
*/
this.noiseDetail = options.noiseDetail ?? 16.0;
/**
* <p>
* Applies a translation to noise texture coordinates to generate different data.
* This can be modified if the default noise does not generate good-looking clouds.
* </p>
*
* <div align='center'>
* <table border='0' cellpadding='5'><tr>
* <td align='center'>
* <code>default</code><br/>
* <img src='Images/CloudCollection.noiseOffsetdefault.png' width='250' height='158' />
* </td>
* <td align='center'>
* <code>clouds.noiseOffset = new Cesium.Cartesian3(10, 20, 10);</code><br/>
* <img src='Images/CloudCollection.noiseOffsetx10y20z10.png' width='250' height='158' />
* </td>
* </tr></table>
* </div>
* @type {Cartesian3}
*
* @default Cartesian3.ZERO
*/
this.noiseOffset = Cartesian3.clone(options.noiseOffset ?? Cartesian3.ZERO);
this._loading = false;
this._ready = false;
const that = this;
this._uniforms = {
u_noiseTexture: function () {
return that._noiseTexture;
},
u_noiseTextureDimensions: getNoiseTextureDimensions(that),
u_noiseDetail: function () {
return that.noiseDetail;
},
};
this._vaNoise = undefined;
this._spNoise = undefined;
this._spCreated = false;
this._sp = undefined;
this._rs = undefined;
/**
* Determines if billboards in this collection will be shown.
*
* @type {boolean}
* @default true
*/
this.show = options.show ?? true;
this._colorCommands = [];
/**
* This property is for debugging only; it is not for production use nor is it optimized.
* <p>
* Renders the billboards with one opaque color for the sake of debugging.
* </p>
*
* @type {boolean}
*
* @default false
*/
this.debugBillboards = options.debugBillboards ?? false;
this._compiledDebugBillboards = false;
/**
* This property is for debugging only; it is not for production use nor is it optimized.
* <p>
* Draws the clouds as opaque, monochrome ellipsoids for the sake of debugging.
* If <code>debugBillboards</code> is also true, then the ellipsoids will draw on top of the billboards.
* </p>
*
* @type {boolean}
*
* @default false
*/
this.debugEllipsoids = options.debugEllipsoids ?? false;
this._compiledDebugEllipsoids = false;
}
// Wraps useful texture metrics into a single vec3 for less overhead.
function getNoiseTextureDimensions(collection) {
return function () {
scratchTextureDimensions.x = collection._textureSliceWidth;
scratchTextureDimensions.y = collection._noiseTextureRows;
scratchTextureDimensions.z = 1.0 / collection._noiseTextureRows;
return scratchTextureDimensions;
};
}
Object.defineProperties(CloudCollection.prototype, {
/**
* Returns the number of clouds in this collection.
* @memberof CloudCollection.prototype
* @type {number}
*/
length: {
get: function () {
removeClouds(this);
return this._clouds.length;
},
},
});
function destroyClouds(clouds) {
const length = clouds.length;
for (let i = 0; i < length; ++i) {
if (clouds[i]) {
clouds[i]._destroy();
}
}
}
/**
* Creates and adds a cloud with the specified initial properties to the collection.
* The added cloud is returned so it can be modified or removed from the collection later.
*
* @param {object}[options] A template describing the cloud's properties as shown in Example 1.
* @returns {CumulusCloud} The cloud that was added to the collection.
*
* @performance Calling <code>add</code> is expected constant time. However, the collection's vertex buffer
* is rewritten - an <code>O(n)</code> operation that also incurs CPU to GPU overhead. For
* best performance, add as many clouds as possible before calling <code>update</code>.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*
*
* @example
* // Example 1: Add a cumulus cloud, specifying all the default values.
* const c = clouds.add({
* show : true,
* position : Cesium.Cartesian3.ZERO,
* scale : new Cesium.Cartesian2(20.0, 12.0),
* maximumSize: new Cesium.Cartesian3(20.0, 12.0, 12.0),
* slice: -1.0,
* cloudType : CloudType.CUMULUS
* });
*
* @example
* // Example 2: Specify only the cloud's cartographic position.
* const c = clouds.add({
* position : Cesium.Cartesian3.fromDegrees(longitude, latitude, height)
* });
*
* @see CloudCollection#remove
* @see CloudCollection#removeAll
*/
CloudCollection.prototype.add = function (options) {
options = options ?? Frozen.EMPTY_OBJECT;
const cloudType = options.cloudType ?? CloudType.CUMULUS;
//>>includeStart('debug', pragmas.debug);
if (!CloudType.validate(cloudType)) {
throw new DeveloperError("invalid cloud type");
}
//>>includeEnd('debug');
let cloud;
Eif (cloudType === CloudType.CUMULUS) {
cloud = new CumulusCloud(options, this);
cloud._index = this._clouds.length;
this._clouds.push(cloud);
this._createVertexArray = true;
}
return cloud;
};
/**
* Removes a cloud from the collection.
*
* @param {CumulusCloud} cloud The cloud to remove.
* @returns {boolean} <code>true</code> if the cloud was removed; <code>false</code> if the cloud was not found in the collection.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*
*
* @example
* const c = clouds.add(...);
* clouds.remove(c); // Returns true
*
* @see CloudCollection#add
* @see CloudCollection#removeAll
* @see CumulusCloud#show
*/
CloudCollection.prototype.remove = function (cloud) {
if (this.contains(cloud)) {
this._clouds[cloud._index] = undefined; // Removed later in removeClouds()
this._cloudsRemoved = true;
this._createVertexArray = true;
cloud._destroy();
return true;
}
return false;
};
/**
* Removes all clouds from the collection.
*
* @performance <code>O(n)</code>. It is more efficient to remove all the clouds
* from a collection and then add new ones than to create a new collection entirely.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*
* @example
* clouds.add(...);
* clouds.add(...);
* clouds.removeAll();
*
* @see CloudCollection#add
* @see CloudCollection#remove
*/
CloudCollection.prototype.removeAll = function () {
destroyClouds(this._clouds);
this._clouds = [];
this._cloudsToUpdate = [];
this._cloudsToUpdateIndex = 0;
this._cloudsRemoved = false;
this._createVertexArray = true;
};
function removeClouds(cloudCollection) {
if (cloudCollection._cloudsRemoved) {
cloudCollection._cloudsRemoved = false;
const newClouds = [];
const clouds = cloudCollection._clouds;
const length = clouds.length;
for (let i = 0, j = 0; i < length; ++i) {
const cloud = clouds[i];
if (defined(cloud)) {
clouds._index = j++;
newClouds.push(cloud);
}
}
cloudCollection._clouds = newClouds;
}
}
CloudCollection.prototype._updateCloud = function (cloud, propertyChanged) {
if (!cloud._dirty) {
this._cloudsToUpdate[this._cloudsToUpdateIndex++] = cloud;
}
++this._propertiesChanged[propertyChanged];
};
/**
* Check whether this collection contains a given cloud.
*
* @param {CumulusCloud} [cloud] The cloud to check for.
* @returns {boolean} true if this collection contains the cloud, false otherwise.
*
* @see CloudCollection#get
*/
CloudCollection.prototype.contains = function (cloud) {
return defined(cloud) && cloud._cloudCollection === this;
};
/**
* Returns the cloud in the collection at the specified index. Indices are zero-based
* and increase as clouds are added. Removing a cloud shifts all clouds after
* it to the left, changing their indices. This function is commonly used with
* {@link CloudCollection#length} to iterate over all the clouds in the collection.
*
* @param {number} index The zero-based index of the cloud.
* @returns {CumulusCloud} The cloud at the specified index.
*
* @performance Expected constant time. If clouds were removed from the collection and
* {@link CloudCollection#update} was not called, an implicit <code>O(n)</code>
* operation is performed.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*
*
* @example
* // Toggle the show property of every cloud in the collection
* const len = clouds.length;
* for (let i = 0; i < len; ++i) {
* const c = clouds.get(i);
* c.show = !c.show;
* }
*
* @see CloudCollection#length
*/
CloudCollection.prototype.get = function (index) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.number("index", index);
//>>includeEnd('debug');
removeClouds(this);
return this._clouds[index];
};
const texturePositions = new Float32Array([
-1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0,
]);
const textureIndices = new Uint16Array([0, 1, 2, 0, 2, 3]);
function createTextureVA(context) {
const positionBuffer = Buffer.createVertexBuffer({
context: context,
typedArray: texturePositions,
usage: BufferUsage.STATIC_DRAW,
});
const indexBuffer = Buffer.createIndexBuffer({
context: context,
typedArray: textureIndices,
usage: BufferUsage.STATIC_DRAW,
indexDatatype: IndexDatatype.UNSIGNED_SHORT,
});
const attributes = [
{
index: 0,
vertexBuffer: positionBuffer,
componentsPerAttribute: 2,
componentDatatype: ComponentDatatype.FLOAT,
},
];
return new VertexArray({
context: context,
attributes: attributes,
indexBuffer: indexBuffer,
});
}
let getIndexBuffer;
function getIndexBufferBatched(context) {
const sixteenK = 16 * 1024;
let indexBuffer = context.cache.cloudCollection_indexBufferBatched;
if (defined(indexBuffer)) {
return indexBuffer;
}
// Subtract 6 because the last index is reserved for primitive restart.
// https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.18
const length = sixteenK * 6 - 6;
const indices = new Uint16Array(length);
for (let i = 0, j = 0; i < length; i += 6, j += 4) {
indices[i] = j;
indices[i + 1] = j + 1;
indices[i + 2] = j + 2;
indices[i + 3] = j;
indices[i + 4] = j + 2;
indices[i + 5] = j + 3;
}
indexBuffer = Buffer.createIndexBuffer({
context: context,
typedArray: indices,
usage: BufferUsage.STATIC_DRAW,
indexDatatype: IndexDatatype.UNSIGNED_SHORT,
});
indexBuffer.vertexArrayDestroyable = false;
context.cache.cloudCollection_indexBufferBatched = indexBuffer;
return indexBuffer;
}
function getIndexBufferInstanced(context) {
let indexBuffer = context.cache.cloudCollection_indexBufferInstanced;
if (defined(indexBuffer)) {
return indexBuffer;
}
indexBuffer = Buffer.createIndexBuffer({
context: context,
typedArray: new Uint16Array([0, 1, 2, 0, 2, 3]),
usage: BufferUsage.STATIC_DRAW,
indexDatatype: IndexDatatype.UNSIGNED_SHORT,
});
indexBuffer.vertexArrayDestroyable = false;
context.cache.cloudCollection_indexBufferInstanced = indexBuffer;
return indexBuffer;
}
function getVertexBufferInstanced(context) {
let vertexBuffer = context.cache.cloudCollection_vertexBufferInstanced;
if (defined(vertexBuffer)) {
return vertexBuffer;
}
vertexBuffer = Buffer.createVertexBuffer({
context: context,
typedArray: new Float32Array([0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0]),
usage: BufferUsage.STATIC_DRAW,
});
vertexBuffer.vertexArrayDestroyable = false;
context.cache.cloudCollection_vertexBufferInstanced = vertexBuffer;
return vertexBuffer;
}
function createVAF(context, numberOfClouds, instanced) {
const attributes = [
{
index: attributeLocations.positionHighAndScaleX,
componentsPerAttribute: 4,
componentDatatype: ComponentDatatype.FLOAT,
usage: BufferUsage.STATIC_DRAW,
},
{
index: attributeLocations.positionLowAndScaleY,
componentsPerAttribute: 4,
componentDatatype: ComponentDatatype.FLOAT,
usage: BufferUsage.STATIC_DRAW,
},
{
index: attributeLocations.packedAttribute0,
componentsPerAttribute: 4,
componentDatatype: ComponentDatatype.FLOAT,
usage: BufferUsage.STATIC_DRAW,
},
{
index: attributeLocations.packedAttribute1,
componentsPerAttribute: 4,
componentDatatype: ComponentDatatype.FLOAT,
usage: BufferUsage.STATIC_DRAW,
},
{
index: attributeLocations.color,
componentsPerAttribute: 4,
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
normalize: true,
usage: BufferUsage.STATIC_DRAW,
},
];
if (instanced) {
attributes.push({
index: attributeLocations.direction,
componentsPerAttribute: 2,
componentDatatype: ComponentDatatype.FLOAT,
vertexBuffer: getVertexBufferInstanced(context),
});
}
const sizeInVertices = instanced ? numberOfClouds : 4 * numberOfClouds;
return new VertexArrayFacade(context, attributes, sizeInVertices, instanced);
}
const writePositionScratch = new EncodedCartesian3();
function writePositionAndScale(cloudCollection, frameState, vafWriters, cloud) {
let i;
const positionHighWriter =
vafWriters[attributeLocations.positionHighAndScaleX];
const positionLowWriter = vafWriters[attributeLocations.positionLowAndScaleY];
const position = cloud.position;
EncodedCartesian3.fromCartesian(position, writePositionScratch);
const scale = cloud.scale;
const high = writePositionScratch.high;
const low = writePositionScratch.low;
if (cloudCollection._instanced) {
i = cloud._index;
positionHighWriter(i, high.x, high.y, high.z, scale.x);
positionLowWriter(i, low.x, low.y, low.z, scale.y);
} else {
i = cloud._index * 4;
positionHighWriter(i + 0, high.x, high.y, high.z, scale.x);
positionHighWriter(i + 1, high.x, high.y, high.z, scale.x);
positionHighWriter(i + 2, high.x, high.y, high.z, scale.x);
positionHighWriter(i + 3, high.x, high.y, high.z, scale.x);
positionLowWriter(i + 0, low.x, low.y, low.z, scale.y);
positionLowWriter(i + 1, low.x, low.y, low.z, scale.y);
positionLowWriter(i + 2, low.x, low.y, low.z, scale.y);
positionLowWriter(i + 3, low.x, low.y, low.z, scale.y);
}
}
function writePackedAttribute0(cloudCollection, frameState, vafWriters, cloud) {
let i;
const writer = vafWriters[attributeLocations.packedAttribute0];
const show = cloud.show;
const brightness = cloud.brightness;
if (cloudCollection._instanced) {
i = cloud._index;
writer(i, show, brightness, 0.0, 0.0);
} else {
i = cloud._index * 4;
writer(i + 0, show, brightness, 0.0, 0.0);
writer(i + 1, show, brightness, 1.0, 0.0);
writer(i + 2, show, brightness, 1.0, 1.0);
writer(i + 3, show, brightness, 0.0, 1.0);
}
}
function writePackedAttribute1(cloudCollection, frameState, vafWriters, cloud) {
let i;
const writer = vafWriters[attributeLocations.packedAttribute1];
const maximumSize = cloud.maximumSize;
const slice = cloud.slice;
if (cloudCollection._instanced) {
i = cloud._index;
writer(i, maximumSize.x, maximumSize.y, maximumSize.z, slice);
} else {
i = cloud._index * 4;
writer(i + 0, maximumSize.x, maximumSize.y, maximumSize.z, slice);
writer(i + 1, maximumSize.x, maximumSize.y, maximumSize.z, slice);
writer(i + 2, maximumSize.x, maximumSize.y, maximumSize.z, slice);
writer(i + 3, maximumSize.x, maximumSize.y, maximumSize.z, slice);
}
}
function writeColor(cloudCollection, frameState, vafWriters, cloud) {
let i;
const writer = vafWriters[attributeLocations.color];
const color = cloud.color;
const red = Color.floatToByte(color.red);
const green = Color.floatToByte(color.green);
const blue = Color.floatToByte(color.blue);
const alpha = Color.floatToByte(color.alpha);
if (cloudCollection._instanced) {
i = cloud._index;
writer(i, red, green, blue, alpha);
} else {
i = cloud._index * 4;
writer(i + 0, red, green, blue, alpha);
writer(i + 1, red, green, blue, alpha);
writer(i + 2, red, green, blue, alpha);
writer(i + 3, red, green, blue, alpha);
}
}
function writeCloud(cloudCollection, frameState, vafWriters, cloud) {
writePositionAndScale(cloudCollection, frameState, vafWriters, cloud);
writePackedAttribute0(cloudCollection, frameState, vafWriters, cloud);
writePackedAttribute1(cloudCollection, frameState, vafWriters, cloud);
writeColor(cloudCollection, frameState, vafWriters, cloud);
}
function createNoiseTexture(cloudCollection, frameState, vsSource, fsSource) {
const that = cloudCollection;
const textureSliceWidth = that._textureSliceWidth;
const noiseTextureRows = that._noiseTextureRows;
//>>includeStart('debug', pragmas.debug);
if (
textureSliceWidth / noiseTextureRows < 1 ||
textureSliceWidth % noiseTextureRows !== 0
) {
throw new DeveloperError(
"noiseTextureRows must evenly divide textureSliceWidth",
);
}
//>>includeEnd('debug');
const context = frameState.context;
that._vaNoise = createTextureVA(context);
that._spNoise = ShaderProgram.fromCache({
context: context,
vertexShaderSource: vsSource,
fragmentShaderSource: fsSource,
attributeLocations: {
position: 0,
},
});
const noiseDetail = that.noiseDetail;
const noiseOffset = that.noiseOffset;
that._noiseTexture = new Texture({
context: context,
width: (textureSliceWidth * textureSliceWidth) / noiseTextureRows,
height: textureSliceWidth * noiseTextureRows,
pixelDatatype: PixelDatatype.UNSIGNED_BYTE,
pixelFormat: PixelFormat.RGBA,
sampler: new Sampler({
wrapS: TextureWrap.REPEAT,
wrapT: TextureWrap.REPEAT,
minificationFilter: TextureMinificationFilter.NEAREST,
magnificationFilter: TextureMagnificationFilter.NEAREST,
}),
});
const textureCommand = new ComputeCommand({
vertexArray: that._vaNoise,
shaderProgram: that._spNoise,
outputTexture: that._noiseTexture,
uniformMap: {
u_noiseTextureDimensions: getNoiseTextureDimensions(that),
u_noiseDetail: function () {
return noiseDetail;
},
u_noiseOffset: function () {
return noiseOffset;
},
},
persists: false,
owner: cloudCollection,
postExecute: function (texture) {
that._ready = true;
that._loading = false;
},
});
frameState.commandList.push(textureCommand);
that._loading = true;
}
function createVertexArray(cloudCollection, frameState) {
const that = cloudCollection;
const context = frameState.context;
that._createVertexArray = false;
that._vaf = that._vaf && that._vaf.destroy();
const clouds = cloudCollection._clouds;
const cloudsLength = clouds.length;
if (cloudsLength > 0) {
that._vaf = createVAF(context, cloudsLength, that._instanced);
const vafWriters = that._vaf.writers;
let i;
// Rewrite entire buffer if clouds were added or removed.
for (i = 0; i < cloudsLength; ++i) {
const cloud = clouds[i];
writeCloud(cloudCollection, frameState, vafWriters, cloud);
}
// Different cloud collections share the same index buffer.
that._vaf.commit(getIndexBuffer(context));
}
}
const scratchWriterArray = [];
function updateClouds(cloudCollection, frameState) {
const context = frameState.context;
const that = cloudCollection;
const clouds = that._clouds;
const cloudsLength = clouds.length;
const cloudsToUpdate = that._cloudsToUpdate;
const cloudsToUpdateLength = that._cloudsToUpdateIndex;
const properties = that._propertiesChanged;
const writers = scratchWriterArray;
writers.length = 0;
if (properties[POSITION_INDEX] || properties[SCALE_INDEX]) {
writers.push(writePositionAndScale);
}
if (properties[SHOW_INDEX] || properties[BRIGHTNESS_INDEX]) {
writers.push(writePackedAttribute0);
}
if (properties[MAXIMUM_SIZE_INDEX] || properties[SLICE_INDEX]) {
writers.push(writePackedAttribute1);
}
if (properties[COLOR_INDEX]) {
writers.push(writeColor);
}
const numWriters = writers.length;
const vafWriters = that._vaf.writers;
let i, c, w;
if (cloudsToUpdateLength / cloudsLength > 0.1) {
// Like BillboardCollection, if more than 10% of clouds change,
// rewrite the entire buffer.
for (i = 0; i < cloudsToUpdateLength; ++i) {
c = cloudsToUpdate[i];
c._dirty = false;
for (w = 0; w < numWriters; ++w) {
writers[w](cloudCollection, frameState, vafWriters, c);
}
}
that._vaf.commit(getIndexBuffer(context));
} else {
for (i = 0; i < cloudsToUpdateLength; ++i) {
c = cloudsToUpdate[i];
c._dirty = false;
for (w = 0; w < numWriters; ++w) {
writers[w](cloudCollection, frameState, vafWriters, c);
}
if (that._instanced) {
that._vaf.subCommit(c._index, 1);
} else E{
that._vaf.subCommit(c._index * 4, 4);
}
}
that._vaf.endSubCommits();
}
that._cloudsToUpdateIndex = 0;
}
function createShaderProgram(cloudCollection, frameState, vsSource, fsSource) {
const context = frameState.context;
const that = cloudCollection;
const vs = new ShaderSource({
defines: [],
sources: [vsSource],
});
if (that._instanced) {
vs.defines.push("INSTANCED");
}
const fs = new ShaderSource({
defines: [],
sources: [fsSource],
});
if (that.debugBillboards) {
fs.defines.push("DEBUG_BILLBOARDS");
}
if (that.debugEllipsoids) {
fs.defines.push("DEBUG_ELLIPSOIDS");
}
that._sp = ShaderProgram.replaceCache({
context: context,
shaderProgram: that._sp,
vertexShaderSource: vs,
fragmentShaderSource: fs,
attributeLocations: attributeLocations,
});
that._rs = RenderState.fromCache({
depthTest: {
enabled: true,
func: WebGLConstants.LESS,
},
depthMask: false,
blending: BlendingState.ALPHA_BLEND,
});
that._spCreated = true;
that._compiledDebugBillboards = that.debugBillboards;
that._compiledDebugEllipsoids = that.debugEllipsoids;
}
function createDrawCommands(cloudCollection, frameState) {
const that = cloudCollection;
const pass = frameState.passes;
const uniforms = that._uniforms;
const commandList = frameState.commandList;
Eif (pass.render) {
const colorList = that._colorCommands;
const va = that._vaf.va;
const vaLength = va.length;
colorList.length = vaLength;
for (let i = 0; i < vaLength; i++) {
let command = colorList[i];
if (!defined(command)) {
command = colorList[i] = new DrawCommand();
}
command.pass = Pass.TRANSLUCENT;
command.owner = cloudCollection;
command.uniformMap = uniforms;
command.count = va[i].indicesCount;
command.vertexArray = va[i].va;
command.shaderProgram = that._sp;
command.renderState = that._rs;
if (that._instanced) {
command.count = 6;
command.instanceCount = that._clouds.length;
}
commandList.push(command);
}
}
}
/**
* @private
*/
CloudCollection.prototype.update = function (frameState) {
removeClouds(this);
if (!this.show) {
return;
}
const debugging = this.debugBillboards || this.debugEllipsoids;
this._ready = debugging ? true : defined(this._noiseTexture);
if (!this._ready && !this._loading && !debugging) {
createNoiseTexture(this, frameState, CloudNoiseVS, CloudNoiseFS);
}
this._instanced = frameState.context.instancedArrays;
attributeLocations = this._instanced
? attributeLocationsInstanced
: attributeLocationsBatched;
getIndexBuffer = this._instanced
? getIndexBufferInstanced
: getIndexBufferBatched;
const clouds = this._clouds;
const cloudsLength = clouds.length;
const cloudsToUpdate = this._cloudsToUpdate;
const cloudsToUpdateLength = this._cloudsToUpdateIndex;
if (this._createVertexArray) {
createVertexArray(this, frameState);
} else if (cloudsToUpdateLength > 0) {
// Clouds were modified, but none were added or removed.
updateClouds(this, frameState);
}
// If the number of total clouds ever shrinks considerably,
// truncate cloudsToUpdate so that we free memory that
// we are no longer using.
if (cloudsToUpdateLength > cloudsLength * 1.5) {
cloudsToUpdate.length = cloudsLength;
}
if (
!defined(this._vaf) ||
!defined(this._vaf.va) ||
!this._ready & !debugging
) {
return;
}
if (
!this._spCreated ||
this.debugBillboards !== this._compiledDebugBillboards ||
this.debugEllipsoids !== this._compiledDebugEllipsoids
) {
createShaderProgram(this, frameState, CloudCollectionVS, CloudCollectionFS);
}
createDrawCommands(this, frameState);
};
/**
* 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 CloudCollection#destroy
*/
CloudCollection.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.
*
*
* @example
* clouds = clouds && clouds.destroy();
*
* @see CloudCollection#isDestroyed
*/
CloudCollection.prototype.destroy = function () {
this._noiseTexture = this._noiseTexture && this._noiseTexture.destroy();
this._sp = this._sp && this._sp.destroy();
this._vaf = this._vaf && this._vaf.destroy();
destroyClouds(this._clouds);
return destroyObject(this);
};
export default CloudCollection;
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