import AttributeCompression from '../Core/AttributeCompression.js';
|
import BoundingSphere from '../Core/BoundingSphere.js';
|
import Cartesian2 from '../Core/Cartesian2.js';
|
import Cartesian3 from '../Core/Cartesian3.js';
|
import Color from '../Core/Color.js';
|
import ComponentDatatype from '../Core/ComponentDatatype.js';
|
import defaultValue from '../Core/defaultValue.js';
|
import defined from '../Core/defined.js';
|
import destroyObject from '../Core/destroyObject.js';
|
import DeveloperError from '../Core/DeveloperError.js';
|
import EncodedCartesian3 from '../Core/EncodedCartesian3.js';
|
import IndexDatatype from '../Core/IndexDatatype.js';
|
import CesiumMath from '../Core/Math.js';
|
import Matrix4 from '../Core/Matrix4.js';
|
import WebGLConstants from '../Core/WebGLConstants.js';
|
import Buffer from '../Renderer/Buffer.js';
|
import BufferUsage from '../Renderer/BufferUsage.js';
|
import ContextLimits from '../Renderer/ContextLimits.js';
|
import DrawCommand from '../Renderer/DrawCommand.js';
|
import Pass from '../Renderer/Pass.js';
|
import RenderState from '../Renderer/RenderState.js';
|
import ShaderProgram from '../Renderer/ShaderProgram.js';
|
import ShaderSource from '../Renderer/ShaderSource.js';
|
import VertexArrayFacade from '../Renderer/VertexArrayFacade.js';
|
import BillboardCollectionFS from '../Shaders/BillboardCollectionFS.js';
|
import BillboardCollectionVS from '../Shaders/BillboardCollectionVS.js';
|
import Billboard from './Billboard.js';
|
import BlendingState from './BlendingState.js';
|
import BlendOption from './BlendOption.js';
|
import HeightReference from './HeightReference.js';
|
import HorizontalOrigin from './HorizontalOrigin.js';
|
import SceneMode from './SceneMode.js';
|
import SDFSettings from './SDFSettings.js';
|
import TextureAtlas from './TextureAtlas.js';
|
import VerticalOrigin from './VerticalOrigin.js';
|
|
var SHOW_INDEX = Billboard.SHOW_INDEX;
|
var POSITION_INDEX = Billboard.POSITION_INDEX;
|
var PIXEL_OFFSET_INDEX = Billboard.PIXEL_OFFSET_INDEX;
|
var EYE_OFFSET_INDEX = Billboard.EYE_OFFSET_INDEX;
|
var HORIZONTAL_ORIGIN_INDEX = Billboard.HORIZONTAL_ORIGIN_INDEX;
|
var VERTICAL_ORIGIN_INDEX = Billboard.VERTICAL_ORIGIN_INDEX;
|
var SCALE_INDEX = Billboard.SCALE_INDEX;
|
var IMAGE_INDEX_INDEX = Billboard.IMAGE_INDEX_INDEX;
|
var COLOR_INDEX = Billboard.COLOR_INDEX;
|
var ROTATION_INDEX = Billboard.ROTATION_INDEX;
|
var ALIGNED_AXIS_INDEX = Billboard.ALIGNED_AXIS_INDEX;
|
var SCALE_BY_DISTANCE_INDEX = Billboard.SCALE_BY_DISTANCE_INDEX;
|
var TRANSLUCENCY_BY_DISTANCE_INDEX = Billboard.TRANSLUCENCY_BY_DISTANCE_INDEX;
|
var PIXEL_OFFSET_SCALE_BY_DISTANCE_INDEX = Billboard.PIXEL_OFFSET_SCALE_BY_DISTANCE_INDEX;
|
var DISTANCE_DISPLAY_CONDITION_INDEX = Billboard.DISTANCE_DISPLAY_CONDITION;
|
var DISABLE_DEPTH_DISTANCE = Billboard.DISABLE_DEPTH_DISTANCE;
|
var TEXTURE_COORDINATE_BOUNDS = Billboard.TEXTURE_COORDINATE_BOUNDS;
|
var SDF_INDEX = Billboard.SDF_INDEX;
|
var NUMBER_OF_PROPERTIES = Billboard.NUMBER_OF_PROPERTIES;
|
|
var attributeLocations;
|
|
var attributeLocationsBatched = {
|
positionHighAndScale : 0,
|
positionLowAndRotation : 1,
|
compressedAttribute0 : 2, // pixel offset, translate, horizontal origin, vertical origin, show, direction, texture coordinates
|
compressedAttribute1 : 3, // aligned axis, translucency by distance, image width
|
compressedAttribute2 : 4, // image height, color, pick color, size in meters, valid aligned axis, 13 bits free
|
eyeOffset : 5, // 4 bytes free
|
scaleByDistance : 6,
|
pixelOffsetScaleByDistance : 7,
|
compressedAttribute3 : 8,
|
textureCoordinateBoundsOrLabelTranslate : 9,
|
a_batchId : 10,
|
sdf: 11
|
};
|
|
var attributeLocationsInstanced = {
|
direction : 0,
|
positionHighAndScale : 1,
|
positionLowAndRotation : 2, // texture offset in w
|
compressedAttribute0 : 3,
|
compressedAttribute1 : 4,
|
compressedAttribute2 : 5,
|
eyeOffset : 6, // texture range in w
|
scaleByDistance : 7,
|
pixelOffsetScaleByDistance : 8,
|
compressedAttribute3 : 9,
|
textureCoordinateBoundsOrLabelTranslate : 10,
|
a_batchId : 11,
|
sdf: 12
|
};
|
|
/**
|
* A renderable collection of billboards. Billboards are viewport-aligned
|
* images positioned in the 3D scene.
|
* <br /><br />
|
* <div align='center'>
|
* <img src='Images/Billboard.png' width='400' height='300' /><br />
|
* Example billboards
|
* </div>
|
* <br /><br />
|
* Billboards are added and removed from the collection using {@link BillboardCollection#add}
|
* and {@link BillboardCollection#remove}. Billboards in a collection automatically share textures
|
* for images with the same identifier.
|
*
|
* @alias BillboardCollection
|
* @constructor
|
*
|
* @param {Object} [options] Object with the following properties:
|
* @param {Matrix4} [options.modelMatrix=Matrix4.IDENTITY] The 4x4 transformation matrix that transforms each billboard from model to world coordinates.
|
* @param {Boolean} [options.debugShowBoundingVolume=false] For debugging only. Determines if this primitive's commands' bounding spheres are shown.
|
* @param {Scene} [options.scene] Must be passed in for billboards that use the height reference property or will be depth tested against the globe.
|
* @param {BlendOption} [options.blendOption=BlendOption.OPAQUE_AND_TRANSLUCENT] The billboard blending option. The default
|
* is used for rendering both opaque and translucent billboards. However, if either all of the billboards are completely opaque or all are completely translucent,
|
* setting the technique to BlendOption.OPAQUE or BlendOption.TRANSLUCENT can improve performance by up to 2x.
|
*
|
* @performance For best performance, prefer a few collections, each with many billboards, to
|
* many collections with only a few billboards each. Organize collections so that billboards
|
* with the same update frequency are in the same collection, i.e., billboards that do not
|
* change should be in one collection; billboards that change every frame should be in another
|
* collection; and so on.
|
*
|
* @see BillboardCollection#add
|
* @see BillboardCollection#remove
|
* @see Billboard
|
* @see LabelCollection
|
*
|
* @demo {@link https://sandcastle.cesium.com/index.html?src=Billboards.html|Cesium Sandcastle Billboard Demo}
|
*
|
* @example
|
* // Create a billboard collection with two billboards
|
* var billboards = scene.primitives.add(new Cesium.BillboardCollection());
|
* billboards.add({
|
* position : new Cesium.Cartesian3(1.0, 2.0, 3.0),
|
* image : 'url/to/image'
|
* });
|
* billboards.add({
|
* position : new Cesium.Cartesian3(4.0, 5.0, 6.0),
|
* image : 'url/to/another/image'
|
* });
|
*/
|
function BillboardCollection(options) {
|
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
|
|
this._scene = options.scene;
|
this._batchTable = options.batchTable;
|
|
this._textureAtlas = undefined;
|
this._textureAtlasGUID = undefined;
|
this._destroyTextureAtlas = true;
|
this._sp = undefined;
|
this._spTranslucent = undefined;
|
this._rsOpaque = undefined;
|
this._rsTranslucent = undefined;
|
this._vaf = undefined;
|
|
this._billboards = [];
|
this._billboardsToUpdate = [];
|
this._billboardsToUpdateIndex = 0;
|
this._billboardsRemoved = false;
|
this._createVertexArray = false;
|
|
this._shaderRotation = false;
|
this._compiledShaderRotation = false;
|
|
this._shaderAlignedAxis = false;
|
this._compiledShaderAlignedAxis = false;
|
|
this._shaderScaleByDistance = false;
|
this._compiledShaderScaleByDistance = false;
|
|
this._shaderTranslucencyByDistance = false;
|
this._compiledShaderTranslucencyByDistance = false;
|
|
this._shaderPixelOffsetScaleByDistance = false;
|
this._compiledShaderPixelOffsetScaleByDistance = false;
|
|
this._shaderDistanceDisplayCondition = false;
|
this._compiledShaderDistanceDisplayCondition = false;
|
|
this._shaderDisableDepthDistance = false;
|
this._compiledShaderDisableDepthDistance = false;
|
|
this._shaderClampToGround = false;
|
this._compiledShaderClampToGround = false;
|
|
this._propertiesChanged = new Uint32Array(NUMBER_OF_PROPERTIES);
|
|
this._maxSize = 0.0;
|
this._maxEyeOffset = 0.0;
|
this._maxScale = 1.0;
|
this._maxPixelOffset = 0.0;
|
this._allHorizontalCenter = true;
|
this._allVerticalCenter = true;
|
this._allSizedInMeters = true;
|
|
this._baseVolume = new BoundingSphere();
|
this._baseVolumeWC = new BoundingSphere();
|
this._baseVolume2D = new BoundingSphere();
|
this._boundingVolume = new BoundingSphere();
|
this._boundingVolumeDirty = false;
|
|
this._colorCommands = [];
|
|
/**
|
* The 4x4 transformation matrix that transforms each billboard in this collection from model to world coordinates.
|
* When this is the identity matrix, the billboards are drawn in world coordinates, i.e., Earth's WGS84 coordinates.
|
* Local reference frames can be used by providing a different transformation matrix, like that returned
|
* by {@link Transforms.eastNorthUpToFixedFrame}.
|
*
|
* @type {Matrix4}
|
* @default {@link Matrix4.IDENTITY}
|
*
|
*
|
* @example
|
* var center = Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883);
|
* billboards.modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);
|
* billboards.add({
|
* image : 'url/to/image',
|
* position : new Cesium.Cartesian3(0.0, 0.0, 0.0) // center
|
* });
|
* billboards.add({
|
* image : 'url/to/image',
|
* position : new Cesium.Cartesian3(1000000.0, 0.0, 0.0) // east
|
* });
|
* billboards.add({
|
* image : 'url/to/image',
|
* position : new Cesium.Cartesian3(0.0, 1000000.0, 0.0) // north
|
* });
|
* billboards.add({
|
* image : 'url/to/image',
|
* position : new Cesium.Cartesian3(0.0, 0.0, 1000000.0) // up
|
* });
|
*
|
* @see Transforms.eastNorthUpToFixedFrame
|
*/
|
this.modelMatrix = Matrix4.clone(defaultValue(options.modelMatrix, Matrix4.IDENTITY));
|
this._modelMatrix = Matrix4.clone(Matrix4.IDENTITY);
|
|
/**
|
* This property is for debugging only; it is not for production use nor is it optimized.
|
* <p>
|
* Draws the bounding sphere for each draw command in the primitive.
|
* </p>
|
*
|
* @type {Boolean}
|
*
|
* @default false
|
*/
|
this.debugShowBoundingVolume = defaultValue(options.debugShowBoundingVolume, false);
|
|
/**
|
* This property is for debugging only; it is not for production use nor is it optimized.
|
* <p>
|
* Draws the texture atlas for this BillboardCollection as a fullscreen quad.
|
* </p>
|
*
|
* @type {Boolean}
|
*
|
* @default false
|
*/
|
this.debugShowTextureAtlas = defaultValue(options.debugShowTextureAtlas, false);
|
|
/**
|
* The billboard blending option. The default is used for rendering both opaque and translucent billboards.
|
* However, if either all of the billboards are completely opaque or all are completely translucent,
|
* setting the technique to BlendOption.OPAQUE or BlendOption.TRANSLUCENT can improve
|
* performance by up to 2x.
|
* @type {BlendOption}
|
* @default BlendOption.OPAQUE_AND_TRANSLUCENT
|
*/
|
this.blendOption = defaultValue(options.blendOption, BlendOption.OPAQUE_AND_TRANSLUCENT);
|
this._blendOption = undefined;
|
|
this._mode = SceneMode.SCENE3D;
|
|
// The buffer usage for each attribute is determined based on the usage of the attribute over time.
|
this._buffersUsage = [
|
BufferUsage.STATIC_DRAW, // SHOW_INDEX
|
BufferUsage.STATIC_DRAW, // POSITION_INDEX
|
BufferUsage.STATIC_DRAW, // PIXEL_OFFSET_INDEX
|
BufferUsage.STATIC_DRAW, // EYE_OFFSET_INDEX
|
BufferUsage.STATIC_DRAW, // HORIZONTAL_ORIGIN_INDEX
|
BufferUsage.STATIC_DRAW, // VERTICAL_ORIGIN_INDEX
|
BufferUsage.STATIC_DRAW, // SCALE_INDEX
|
BufferUsage.STATIC_DRAW, // IMAGE_INDEX_INDEX
|
BufferUsage.STATIC_DRAW, // COLOR_INDEX
|
BufferUsage.STATIC_DRAW, // ROTATION_INDEX
|
BufferUsage.STATIC_DRAW, // ALIGNED_AXIS_INDEX
|
BufferUsage.STATIC_DRAW, // SCALE_BY_DISTANCE_INDEX
|
BufferUsage.STATIC_DRAW, // TRANSLUCENCY_BY_DISTANCE_INDEX
|
BufferUsage.STATIC_DRAW, // PIXEL_OFFSET_SCALE_BY_DISTANCE_INDEX
|
BufferUsage.STATIC_DRAW, // DISTANCE_DISPLAY_CONDITION_INDEX
|
BufferUsage.STATIC_DRAW // TEXTURE_COORDINATE_BOUNDS
|
];
|
|
this._highlightColor = Color.clone(Color.WHITE); // Only used by Vector3DTilePoints
|
|
var that = this;
|
this._uniforms = {
|
u_atlas : function() {
|
return that._textureAtlas.texture;
|
},
|
u_highlightColor : function() {
|
return that._highlightColor;
|
}
|
};
|
|
var scene = this._scene;
|
if (defined(scene) && defined(scene.terrainProviderChanged)) {
|
this._removeCallbackFunc = scene.terrainProviderChanged.addEventListener(function() {
|
var billboards = this._billboards;
|
var length = billboards.length;
|
for (var i = 0; i < length; ++i) {
|
billboards[i]._updateClamping();
|
}
|
}, this);
|
}
|
}
|
|
Object.defineProperties(BillboardCollection.prototype, {
|
/**
|
* Returns the number of billboards in this collection. This is commonly used with
|
* {@link BillboardCollection#get} to iterate over all the billboards
|
* in the collection.
|
* @memberof BillboardCollection.prototype
|
* @type {Number}
|
*/
|
length : {
|
get : function() {
|
removeBillboards(this);
|
return this._billboards.length;
|
}
|
},
|
|
/**
|
* Gets or sets the textureAtlas.
|
* @memberof BillboardCollection.prototype
|
* @type {TextureAtlas}
|
* @private
|
*/
|
textureAtlas : {
|
get : function() {
|
return this._textureAtlas;
|
},
|
set : function(value) {
|
if (this._textureAtlas !== value) {
|
this._textureAtlas = this._destroyTextureAtlas && this._textureAtlas && this._textureAtlas.destroy();
|
this._textureAtlas = value;
|
this._createVertexArray = true; // New per-billboard texture coordinates
|
}
|
}
|
},
|
|
/**
|
* Gets or sets a value which determines if the texture atlas is
|
* destroyed when the collection is destroyed.
|
*
|
* If the texture atlas is used by more than one collection, set this to <code>false</code>,
|
* and explicitly destroy the atlas to avoid attempting to destroy it multiple times.
|
*
|
* @memberof BillboardCollection.prototype
|
* @type {Boolean}
|
* @private
|
*
|
* @example
|
* // Set destroyTextureAtlas
|
* // Destroy a billboard collection but not its texture atlas.
|
*
|
* var atlas = new TextureAtlas({
|
* scene : scene,
|
* images : images
|
* });
|
* billboards.textureAtlas = atlas;
|
* billboards.destroyTextureAtlas = false;
|
* billboards = billboards.destroy();
|
* console.log(atlas.isDestroyed()); // False
|
*/
|
destroyTextureAtlas : {
|
get : function() {
|
return this._destroyTextureAtlas;
|
},
|
set : function(value) {
|
this._destroyTextureAtlas = value;
|
}
|
}
|
});
|
|
function destroyBillboards(billboards) {
|
var length = billboards.length;
|
for (var i = 0; i < length; ++i) {
|
if (billboards[i]) {
|
billboards[i]._destroy();
|
}
|
}
|
}
|
|
/**
|
* Creates and adds a billboard with the specified initial properties to the collection.
|
* The added billboard is returned so it can be modified or removed from the collection later.
|
*
|
* @param {Object}[options] A template describing the billboard's properties as shown in Example 1.
|
* @returns {Billboard} The billboard 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 billboards as possible before calling <code>update</code>.
|
*
|
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
|
*
|
*
|
* @example
|
* // Example 1: Add a billboard, specifying all the default values.
|
* var b = billboards.add({
|
* show : true,
|
* position : Cesium.Cartesian3.ZERO,
|
* pixelOffset : Cesium.Cartesian2.ZERO,
|
* eyeOffset : Cesium.Cartesian3.ZERO,
|
* heightReference : Cesium.HeightReference.NONE,
|
* horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
|
* verticalOrigin : Cesium.VerticalOrigin.CENTER,
|
* scale : 1.0,
|
* image : 'url/to/image',
|
* imageSubRegion : undefined,
|
* color : Cesium.Color.WHITE,
|
* id : undefined,
|
* rotation : 0.0,
|
* alignedAxis : Cesium.Cartesian3.ZERO,
|
* width : undefined,
|
* height : undefined,
|
* scaleByDistance : undefined,
|
* translucencyByDistance : undefined,
|
* pixelOffsetScaleByDistance : undefined,
|
* sizeInMeters : false,
|
* distanceDisplayCondition : undefined
|
* });
|
*
|
* @example
|
* // Example 2: Specify only the billboard's cartographic position.
|
* var b = billboards.add({
|
* position : Cesium.Cartesian3.fromDegrees(longitude, latitude, height)
|
* });
|
*
|
* @see BillboardCollection#remove
|
* @see BillboardCollection#removeAll
|
*/
|
BillboardCollection.prototype.add = function(options) {
|
var b = new Billboard(options, this);
|
b._index = this._billboards.length;
|
|
this._billboards.push(b);
|
this._createVertexArray = true;
|
|
return b;
|
};
|
|
/**
|
* Removes a billboard from the collection.
|
*
|
* @param {Billboard} billboard The billboard to remove.
|
* @returns {Boolean} <code>true</code> if the billboard was removed; <code>false</code> if the billboard was not found in the collection.
|
*
|
* @performance Calling <code>remove</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, remove as many billboards as possible before calling <code>update</code>.
|
* If you intend to temporarily hide a billboard, it is usually more efficient to call
|
* {@link Billboard#show} instead of removing and re-adding the billboard.
|
*
|
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
|
*
|
*
|
* @example
|
* var b = billboards.add(...);
|
* billboards.remove(b); // Returns true
|
*
|
* @see BillboardCollection#add
|
* @see BillboardCollection#removeAll
|
* @see Billboard#show
|
*/
|
BillboardCollection.prototype.remove = function(billboard) {
|
if (this.contains(billboard)) {
|
this._billboards[billboard._index] = null; // Removed later
|
this._billboardsRemoved = true;
|
this._createVertexArray = true;
|
billboard._destroy();
|
return true;
|
}
|
|
return false;
|
};
|
|
/**
|
* Removes all billboards from the collection.
|
*
|
* @performance <code>O(n)</code>. It is more efficient to remove all the billboards
|
* 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
|
* billboards.add(...);
|
* billboards.add(...);
|
* billboards.removeAll();
|
*
|
* @see BillboardCollection#add
|
* @see BillboardCollection#remove
|
*/
|
BillboardCollection.prototype.removeAll = function() {
|
destroyBillboards(this._billboards);
|
this._billboards = [];
|
this._billboardsToUpdate = [];
|
this._billboardsToUpdateIndex = 0;
|
this._billboardsRemoved = false;
|
|
this._createVertexArray = true;
|
};
|
|
function removeBillboards(billboardCollection) {
|
if (billboardCollection._billboardsRemoved) {
|
billboardCollection._billboardsRemoved = false;
|
|
var newBillboards = [];
|
var billboards = billboardCollection._billboards;
|
var length = billboards.length;
|
for (var i = 0, j = 0; i < length; ++i) {
|
var billboard = billboards[i];
|
if (billboard) {
|
billboard._index = j++;
|
newBillboards.push(billboard);
|
}
|
}
|
|
billboardCollection._billboards = newBillboards;
|
}
|
}
|
|
BillboardCollection.prototype._updateBillboard = function(billboard, propertyChanged) {
|
if (!billboard._dirty) {
|
this._billboardsToUpdate[this._billboardsToUpdateIndex++] = billboard;
|
}
|
|
++this._propertiesChanged[propertyChanged];
|
};
|
|
/**
|
* Check whether this collection contains a given billboard.
|
*
|
* @param {Billboard} [billboard] The billboard to check for.
|
* @returns {Boolean} true if this collection contains the billboard, false otherwise.
|
*
|
* @see BillboardCollection#get
|
*/
|
BillboardCollection.prototype.contains = function(billboard) {
|
return defined(billboard) && billboard._billboardCollection === this;
|
};
|
|
/**
|
* Returns the billboard in the collection at the specified index. Indices are zero-based
|
* and increase as billboards are added. Removing a billboard shifts all billboards after
|
* it to the left, changing their indices. This function is commonly used with
|
* {@link BillboardCollection#length} to iterate over all the billboards
|
* in the collection.
|
*
|
* @param {Number} index The zero-based index of the billboard.
|
* @returns {Billboard} The billboard at the specified index.
|
*
|
* @performance Expected constant time. If billboards were removed from the collection and
|
* {@link BillboardCollection#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 billboard in the collection
|
* var len = billboards.length;
|
* for (var i = 0; i < len; ++i) {
|
* var b = billboards.get(i);
|
* b.show = !b.show;
|
* }
|
*
|
* @see BillboardCollection#length
|
*/
|
BillboardCollection.prototype.get = function(index) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(index)) {
|
throw new DeveloperError('index is required.');
|
}
|
//>>includeEnd('debug');
|
|
removeBillboards(this);
|
return this._billboards[index];
|
};
|
|
var getIndexBuffer;
|
|
function getIndexBufferBatched(context) {
|
var sixteenK = 16 * 1024;
|
|
var indexBuffer = context.cache.billboardCollection_indexBufferBatched;
|
if (defined(indexBuffer)) {
|
return indexBuffer;
|
}
|
|
// Subtract 6 because the last index is reserverd for primitive restart.
|
// https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.18
|
var length = sixteenK * 6 - 6;
|
var indices = new Uint16Array(length);
|
for (var 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 + 0;
|
indices[i + 4] = j + 2;
|
indices[i + 5] = j + 3;
|
}
|
|
// PERFORMANCE_IDEA: Should we reference count billboard collections, and eventually delete this?
|
// Is this too much memory to allocate up front? Should we dynamically grow it?
|
indexBuffer = Buffer.createIndexBuffer({
|
context : context,
|
typedArray : indices,
|
usage : BufferUsage.STATIC_DRAW,
|
indexDatatype : IndexDatatype.UNSIGNED_SHORT
|
});
|
indexBuffer.vertexArrayDestroyable = false;
|
context.cache.billboardCollection_indexBufferBatched = indexBuffer;
|
return indexBuffer;
|
}
|
|
function getIndexBufferInstanced(context) {
|
var indexBuffer = context.cache.billboardCollection_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.billboardCollection_indexBufferInstanced = indexBuffer;
|
return indexBuffer;
|
}
|
|
function getVertexBufferInstanced(context) {
|
var vertexBuffer = context.cache.billboardCollection_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.billboardCollection_vertexBufferInstanced = vertexBuffer;
|
return vertexBuffer;
|
}
|
|
BillboardCollection.prototype.computeNewBuffersUsage = function() {
|
var buffersUsage = this._buffersUsage;
|
var usageChanged = false;
|
|
var properties = this._propertiesChanged;
|
for (var k = 0; k < NUMBER_OF_PROPERTIES; ++k) {
|
var newUsage = (properties[k] === 0) ? BufferUsage.STATIC_DRAW : BufferUsage.STREAM_DRAW;
|
usageChanged = usageChanged || (buffersUsage[k] !== newUsage);
|
buffersUsage[k] = newUsage;
|
}
|
|
return usageChanged;
|
};
|
|
function createVAF(context, numberOfBillboards, buffersUsage, instanced, batchTable, sdf) {
|
var attributes = [{
|
index : attributeLocations.positionHighAndScale,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[POSITION_INDEX]
|
}, {
|
index : attributeLocations.positionLowAndRotation,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[POSITION_INDEX]
|
}, {
|
index : attributeLocations.compressedAttribute0,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[PIXEL_OFFSET_INDEX]
|
}, {
|
index : attributeLocations.compressedAttribute1,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[TRANSLUCENCY_BY_DISTANCE_INDEX]
|
}, {
|
index : attributeLocations.compressedAttribute2,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[COLOR_INDEX]
|
}, {
|
index : attributeLocations.eyeOffset,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[EYE_OFFSET_INDEX]
|
}, {
|
index : attributeLocations.scaleByDistance,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[SCALE_BY_DISTANCE_INDEX]
|
}, {
|
index : attributeLocations.pixelOffsetScaleByDistance,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[PIXEL_OFFSET_SCALE_BY_DISTANCE_INDEX]
|
}, {
|
index : attributeLocations.compressedAttribute3,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[DISTANCE_DISPLAY_CONDITION_INDEX]
|
}, {
|
index : attributeLocations.textureCoordinateBoundsOrLabelTranslate,
|
componentsPerAttribute : 4,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[TEXTURE_COORDINATE_BOUNDS]
|
}];
|
|
// Instancing requires one non-instanced attribute.
|
if (instanced) {
|
attributes.push({
|
index : attributeLocations.direction,
|
componentsPerAttribute : 2,
|
componentDatatype : ComponentDatatype.FLOAT,
|
vertexBuffer : getVertexBufferInstanced(context)
|
});
|
}
|
|
if (defined(batchTable)) {
|
attributes.push({
|
index : attributeLocations.a_batchId,
|
componentsPerAttribute : 1,
|
componentDatatyps : ComponentDatatype.FLOAT,
|
bufferUsage : BufferUsage.STATIC_DRAW
|
});
|
}
|
|
if (sdf) {
|
attributes.push({
|
index : attributeLocations.sdf,
|
componentsPerAttribute : 2,
|
componentDatatype : ComponentDatatype.FLOAT,
|
usage : buffersUsage[SDF_INDEX]
|
});
|
}
|
|
// When instancing is enabled, only one vertex is needed for each billboard.
|
var sizeInVertices = instanced ? numberOfBillboards : 4 * numberOfBillboards;
|
return new VertexArrayFacade(context, attributes, sizeInVertices, instanced);
|
}
|
|
///////////////////////////////////////////////////////////////////////////
|
|
// Four vertices per billboard. Each has the same position, etc., but a different screen-space direction vector.
|
|
// PERFORMANCE_IDEA: Save memory if a property is the same for all billboards, use a latched attribute state,
|
// instead of storing it in a vertex buffer.
|
|
var writePositionScratch = new EncodedCartesian3();
|
|
function writePositionScaleAndRotation(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var positionHighWriter = vafWriters[attributeLocations.positionHighAndScale];
|
var positionLowWriter = vafWriters[attributeLocations.positionLowAndRotation];
|
var position = billboard._getActualPosition();
|
|
if (billboardCollection._mode === SceneMode.SCENE3D) {
|
BoundingSphere.expand(billboardCollection._baseVolume, position, billboardCollection._baseVolume);
|
billboardCollection._boundingVolumeDirty = true;
|
}
|
|
EncodedCartesian3.fromCartesian(position, writePositionScratch);
|
var scale = billboard.scale;
|
var rotation = billboard.rotation;
|
|
if (rotation !== 0.0) {
|
billboardCollection._shaderRotation = true;
|
}
|
|
billboardCollection._maxScale = Math.max(billboardCollection._maxScale, scale);
|
|
var high = writePositionScratch.high;
|
var low = writePositionScratch.low;
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
positionHighWriter(i, high.x, high.y, high.z, scale);
|
positionLowWriter(i, low.x, low.y, low.z, rotation);
|
} else {
|
i = billboard._index * 4;
|
positionHighWriter(i + 0, high.x, high.y, high.z, scale);
|
positionHighWriter(i + 1, high.x, high.y, high.z, scale);
|
positionHighWriter(i + 2, high.x, high.y, high.z, scale);
|
positionHighWriter(i + 3, high.x, high.y, high.z, scale);
|
|
positionLowWriter(i + 0, low.x, low.y, low.z, rotation);
|
positionLowWriter(i + 1, low.x, low.y, low.z, rotation);
|
positionLowWriter(i + 2, low.x, low.y, low.z, rotation);
|
positionLowWriter(i + 3, low.x, low.y, low.z, rotation);
|
}
|
}
|
|
var scratchCartesian2 = new Cartesian2();
|
|
var UPPER_BOUND = 32768.0; // 2^15
|
|
var LEFT_SHIFT16 = 65536.0; // 2^16
|
var LEFT_SHIFT12 = 4096.0; // 2^12
|
var LEFT_SHIFT8 = 256.0; // 2^8
|
var LEFT_SHIFT7 = 128.0;
|
var LEFT_SHIFT5 = 32.0;
|
var LEFT_SHIFT3 = 8.0;
|
var LEFT_SHIFT2 = 4.0;
|
|
var RIGHT_SHIFT8 = 1.0 / 256.0;
|
|
var LOWER_LEFT = 0.0;
|
var LOWER_RIGHT = 2.0;
|
var UPPER_RIGHT = 3.0;
|
var UPPER_LEFT = 1.0;
|
|
function writeCompressedAttrib0(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.compressedAttribute0];
|
var pixelOffset = billboard.pixelOffset;
|
var pixelOffsetX = pixelOffset.x;
|
var pixelOffsetY = pixelOffset.y;
|
|
var translate = billboard._translate;
|
var translateX = translate.x;
|
var translateY = translate.y;
|
|
billboardCollection._maxPixelOffset = Math.max(billboardCollection._maxPixelOffset, Math.abs(pixelOffsetX + translateX), Math.abs(-pixelOffsetY + translateY));
|
|
var horizontalOrigin = billboard.horizontalOrigin;
|
var verticalOrigin = billboard._verticalOrigin;
|
var show = billboard.show && billboard.clusterShow;
|
|
// If the color alpha is zero, do not show this billboard. This lets us avoid providing
|
// color during the pick pass and also eliminates a discard in the fragment shader.
|
if (billboard.color.alpha === 0.0) {
|
show = false;
|
}
|
|
// Raw billboards don't distinguish between BASELINE and BOTTOM, only LabelCollection does that.
|
if (verticalOrigin === VerticalOrigin.BASELINE) {
|
verticalOrigin = VerticalOrigin.BOTTOM;
|
}
|
|
billboardCollection._allHorizontalCenter = billboardCollection._allHorizontalCenter && horizontalOrigin === HorizontalOrigin.CENTER;
|
billboardCollection._allVerticalCenter = billboardCollection._allVerticalCenter && verticalOrigin === VerticalOrigin.CENTER;
|
|
var bottomLeftX = 0;
|
var bottomLeftY = 0;
|
var width = 0;
|
var height = 0;
|
var index = billboard._imageIndex;
|
if (index !== -1) {
|
var imageRectangle = textureAtlasCoordinates[index];
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(imageRectangle)) {
|
throw new DeveloperError('Invalid billboard image index: ' + index);
|
}
|
//>>includeEnd('debug');
|
|
bottomLeftX = imageRectangle.x;
|
bottomLeftY = imageRectangle.y;
|
width = imageRectangle.width;
|
height = imageRectangle.height;
|
}
|
var topRightX = bottomLeftX + width;
|
var topRightY = bottomLeftY + height;
|
|
var compressed0 = Math.floor(CesiumMath.clamp(pixelOffsetX, -UPPER_BOUND, UPPER_BOUND) + UPPER_BOUND) * LEFT_SHIFT7;
|
compressed0 += (horizontalOrigin + 1.0) * LEFT_SHIFT5;
|
compressed0 += (verticalOrigin + 1.0) * LEFT_SHIFT3;
|
compressed0 += (show ? 1.0 : 0.0) * LEFT_SHIFT2;
|
|
var compressed1 = Math.floor(CesiumMath.clamp(pixelOffsetY, -UPPER_BOUND, UPPER_BOUND) + UPPER_BOUND) * LEFT_SHIFT8;
|
var compressed2 = Math.floor(CesiumMath.clamp(translateX, -UPPER_BOUND, UPPER_BOUND) + UPPER_BOUND) * LEFT_SHIFT8;
|
|
var tempTanslateY = (CesiumMath.clamp(translateY, -UPPER_BOUND, UPPER_BOUND) + UPPER_BOUND) * RIGHT_SHIFT8;
|
var upperTranslateY = Math.floor(tempTanslateY);
|
var lowerTranslateY = Math.floor((tempTanslateY - upperTranslateY) * LEFT_SHIFT8);
|
|
compressed1 += upperTranslateY;
|
compressed2 += lowerTranslateY;
|
|
scratchCartesian2.x = bottomLeftX;
|
scratchCartesian2.y = bottomLeftY;
|
var compressedTexCoordsLL = AttributeCompression.compressTextureCoordinates(scratchCartesian2);
|
scratchCartesian2.x = topRightX;
|
var compressedTexCoordsLR = AttributeCompression.compressTextureCoordinates(scratchCartesian2);
|
scratchCartesian2.y = topRightY;
|
var compressedTexCoordsUR = AttributeCompression.compressTextureCoordinates(scratchCartesian2);
|
scratchCartesian2.x = bottomLeftX;
|
var compressedTexCoordsUL = AttributeCompression.compressTextureCoordinates(scratchCartesian2);
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, compressed0, compressed1, compressed2, compressedTexCoordsLL);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, compressed0 + LOWER_LEFT, compressed1, compressed2, compressedTexCoordsLL);
|
writer(i + 1, compressed0 + LOWER_RIGHT, compressed1, compressed2, compressedTexCoordsLR);
|
writer(i + 2, compressed0 + UPPER_RIGHT, compressed1, compressed2, compressedTexCoordsUR);
|
writer(i + 3, compressed0 + UPPER_LEFT, compressed1, compressed2, compressedTexCoordsUL);
|
}
|
}
|
|
function writeCompressedAttrib1(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.compressedAttribute1];
|
var alignedAxis = billboard.alignedAxis;
|
if (!Cartesian3.equals(alignedAxis, Cartesian3.ZERO)) {
|
billboardCollection._shaderAlignedAxis = true;
|
}
|
|
var near = 0.0;
|
var nearValue = 1.0;
|
var far = 1.0;
|
var farValue = 1.0;
|
|
var translucency = billboard.translucencyByDistance;
|
if (defined(translucency)) {
|
near = translucency.near;
|
nearValue = translucency.nearValue;
|
far = translucency.far;
|
farValue = translucency.farValue;
|
|
if (nearValue !== 1.0 || farValue !== 1.0) {
|
// translucency by distance calculation in shader need not be enabled
|
// until a billboard with near and far !== 1.0 is found
|
billboardCollection._shaderTranslucencyByDistance = true;
|
}
|
}
|
|
var width = 0;
|
var index = billboard._imageIndex;
|
if (index !== -1) {
|
var imageRectangle = textureAtlasCoordinates[index];
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(imageRectangle)) {
|
throw new DeveloperError('Invalid billboard image index: ' + index);
|
}
|
//>>includeEnd('debug');
|
|
width = imageRectangle.width;
|
}
|
|
var textureWidth = billboardCollection._textureAtlas.texture.width;
|
var imageWidth = Math.round(defaultValue(billboard.width, textureWidth * width));
|
billboardCollection._maxSize = Math.max(billboardCollection._maxSize, imageWidth);
|
|
var compressed0 = CesiumMath.clamp(imageWidth, 0.0, LEFT_SHIFT16);
|
var compressed1 = 0.0;
|
|
if (Math.abs(Cartesian3.magnitudeSquared(alignedAxis) - 1.0) < CesiumMath.EPSILON6) {
|
compressed1 = AttributeCompression.octEncodeFloat(alignedAxis);
|
}
|
|
nearValue = CesiumMath.clamp(nearValue, 0.0, 1.0);
|
nearValue = nearValue === 1.0 ? 255.0 : (nearValue * 255.0) | 0;
|
compressed0 = compressed0 * LEFT_SHIFT8 + nearValue;
|
|
farValue = CesiumMath.clamp(farValue, 0.0, 1.0);
|
farValue = farValue === 1.0 ? 255.0 : (farValue * 255.0) | 0;
|
compressed1 = compressed1 * LEFT_SHIFT8 + farValue;
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, compressed0, compressed1, near, far);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, compressed0, compressed1, near, far);
|
writer(i + 1, compressed0, compressed1, near, far);
|
writer(i + 2, compressed0, compressed1, near, far);
|
writer(i + 3, compressed0, compressed1, near, far);
|
}
|
}
|
|
function writeCompressedAttrib2(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.compressedAttribute2];
|
var color = billboard.color;
|
var pickColor = !defined(billboardCollection._batchTable) ? billboard.getPickId(context).color : Color.WHITE;
|
var sizeInMeters = billboard.sizeInMeters ? 1.0 : 0.0;
|
var validAlignedAxis = Math.abs(Cartesian3.magnitudeSquared(billboard.alignedAxis) - 1.0) < CesiumMath.EPSILON6 ? 1.0 : 0.0;
|
|
billboardCollection._allSizedInMeters = billboardCollection._allSizedInMeters && sizeInMeters === 1.0;
|
|
var height = 0;
|
var index = billboard._imageIndex;
|
if (index !== -1) {
|
var imageRectangle = textureAtlasCoordinates[index];
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(imageRectangle)) {
|
throw new DeveloperError('Invalid billboard image index: ' + index);
|
}
|
//>>includeEnd('debug');
|
|
height = imageRectangle.height;
|
}
|
|
var dimensions = billboardCollection._textureAtlas.texture.dimensions;
|
var imageHeight = Math.round(defaultValue(billboard.height, dimensions.y * height));
|
billboardCollection._maxSize = Math.max(billboardCollection._maxSize, imageHeight);
|
var labelHorizontalOrigin = defaultValue(billboard._labelHorizontalOrigin, -2);
|
labelHorizontalOrigin += 2;
|
var compressed3 = imageHeight * LEFT_SHIFT2 + labelHorizontalOrigin;
|
|
var red = Color.floatToByte(color.red);
|
var green = Color.floatToByte(color.green);
|
var blue = Color.floatToByte(color.blue);
|
var compressed0 = red * LEFT_SHIFT16 + green * LEFT_SHIFT8 + blue;
|
|
red = Color.floatToByte(pickColor.red);
|
green = Color.floatToByte(pickColor.green);
|
blue = Color.floatToByte(pickColor.blue);
|
var compressed1 = red * LEFT_SHIFT16 + green * LEFT_SHIFT8 + blue;
|
|
var compressed2 = Color.floatToByte(color.alpha) * LEFT_SHIFT16 + Color.floatToByte(pickColor.alpha) * LEFT_SHIFT8;
|
compressed2 += sizeInMeters * 2.0 + validAlignedAxis;
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, compressed0, compressed1, compressed2, compressed3);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, compressed0, compressed1, compressed2, compressed3);
|
writer(i + 1, compressed0, compressed1, compressed2, compressed3);
|
writer(i + 2, compressed0, compressed1, compressed2, compressed3);
|
writer(i + 3, compressed0, compressed1, compressed2, compressed3);
|
}
|
}
|
|
function writeEyeOffset(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.eyeOffset];
|
var eyeOffset = billboard.eyeOffset;
|
|
// For billboards that are clamped to ground, move it slightly closer to the camera
|
var eyeOffsetZ = eyeOffset.z;
|
if (billboard._heightReference !== HeightReference.NONE) {
|
eyeOffsetZ *= 1.005;
|
}
|
billboardCollection._maxEyeOffset = Math.max(billboardCollection._maxEyeOffset, Math.abs(eyeOffset.x), Math.abs(eyeOffset.y), Math.abs(eyeOffsetZ));
|
|
if (billboardCollection._instanced) {
|
var width = 0;
|
var height = 0;
|
var index = billboard._imageIndex;
|
if (index !== -1) {
|
var imageRectangle = textureAtlasCoordinates[index];
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(imageRectangle)) {
|
throw new DeveloperError('Invalid billboard image index: ' + index);
|
}
|
//>>includeEnd('debug');
|
|
width = imageRectangle.width;
|
height = imageRectangle.height;
|
}
|
|
scratchCartesian2.x = width;
|
scratchCartesian2.y = height;
|
var compressedTexCoordsRange = AttributeCompression.compressTextureCoordinates(scratchCartesian2);
|
|
i = billboard._index;
|
writer(i, eyeOffset.x, eyeOffset.y, eyeOffsetZ, compressedTexCoordsRange);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, eyeOffset.x, eyeOffset.y, eyeOffsetZ, 0.0);
|
writer(i + 1, eyeOffset.x, eyeOffset.y, eyeOffsetZ, 0.0);
|
writer(i + 2, eyeOffset.x, eyeOffset.y, eyeOffsetZ, 0.0);
|
writer(i + 3, eyeOffset.x, eyeOffset.y, eyeOffsetZ, 0.0);
|
}
|
}
|
|
function writeScaleByDistance(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.scaleByDistance];
|
var near = 0.0;
|
var nearValue = 1.0;
|
var far = 1.0;
|
var farValue = 1.0;
|
|
var scale = billboard.scaleByDistance;
|
if (defined(scale)) {
|
near = scale.near;
|
nearValue = scale.nearValue;
|
far = scale.far;
|
farValue = scale.farValue;
|
|
if (nearValue !== 1.0 || farValue !== 1.0) {
|
// scale by distance calculation in shader need not be enabled
|
// until a billboard with near and far !== 1.0 is found
|
billboardCollection._shaderScaleByDistance = true;
|
}
|
}
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, near, nearValue, far, farValue);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, near, nearValue, far, farValue);
|
writer(i + 1, near, nearValue, far, farValue);
|
writer(i + 2, near, nearValue, far, farValue);
|
writer(i + 3, near, nearValue, far, farValue);
|
}
|
}
|
|
function writePixelOffsetScaleByDistance(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.pixelOffsetScaleByDistance];
|
var near = 0.0;
|
var nearValue = 1.0;
|
var far = 1.0;
|
var farValue = 1.0;
|
|
var pixelOffsetScale = billboard.pixelOffsetScaleByDistance;
|
if (defined(pixelOffsetScale)) {
|
near = pixelOffsetScale.near;
|
nearValue = pixelOffsetScale.nearValue;
|
far = pixelOffsetScale.far;
|
farValue = pixelOffsetScale.farValue;
|
|
if (nearValue !== 1.0 || farValue !== 1.0) {
|
// pixelOffsetScale by distance calculation in shader need not be enabled
|
// until a billboard with near and far !== 1.0 is found
|
billboardCollection._shaderPixelOffsetScaleByDistance = true;
|
}
|
}
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, near, nearValue, far, farValue);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, near, nearValue, far, farValue);
|
writer(i + 1, near, nearValue, far, farValue);
|
writer(i + 2, near, nearValue, far, farValue);
|
writer(i + 3, near, nearValue, far, farValue);
|
}
|
}
|
|
function writeCompressedAttribute3(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
var i;
|
var writer = vafWriters[attributeLocations.compressedAttribute3];
|
var near = 0.0;
|
var far = Number.MAX_VALUE;
|
|
var distanceDisplayCondition = billboard.distanceDisplayCondition;
|
if (defined(distanceDisplayCondition)) {
|
near = distanceDisplayCondition.near;
|
far = distanceDisplayCondition.far;
|
|
near *= near;
|
far *= far;
|
|
billboardCollection._shaderDistanceDisplayCondition = true;
|
}
|
|
var disableDepthTestDistance = billboard.disableDepthTestDistance;
|
var clampToGround = billboard.heightReference === HeightReference.CLAMP_TO_GROUND && billboardCollection._scene.context.depthTexture;
|
if (!defined(disableDepthTestDistance)) {
|
disableDepthTestDistance = clampToGround ? 5000.0 : 0.0;
|
}
|
|
disableDepthTestDistance *= disableDepthTestDistance;
|
if (clampToGround || disableDepthTestDistance > 0.0) {
|
billboardCollection._shaderDisableDepthDistance = true;
|
if (disableDepthTestDistance === Number.POSITIVE_INFINITY) {
|
disableDepthTestDistance = -1.0;
|
}
|
}
|
|
var imageHeight;
|
var imageWidth;
|
|
if (!defined(billboard._labelDimensions)) {
|
var height = 0;
|
var width = 0;
|
var index = billboard._imageIndex;
|
if (index !== -1) {
|
var imageRectangle = textureAtlasCoordinates[index];
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(imageRectangle)) {
|
throw new DeveloperError('Invalid billboard image index: ' + index);
|
}
|
//>>includeEnd('debug');
|
|
height = imageRectangle.height;
|
width = imageRectangle.width;
|
}
|
|
imageHeight = Math.round(defaultValue(billboard.height, billboardCollection._textureAtlas.texture.dimensions.y * height));
|
|
var textureWidth = billboardCollection._textureAtlas.texture.width;
|
imageWidth = Math.round(defaultValue(billboard.width, textureWidth * width));
|
} else {
|
imageWidth = billboard._labelDimensions.x;
|
imageHeight = billboard._labelDimensions.y;
|
}
|
|
var w = Math.floor(CesiumMath.clamp(imageWidth, 0.0, LEFT_SHIFT12));
|
var h = Math.floor(CesiumMath.clamp(imageHeight, 0.0, LEFT_SHIFT12));
|
var dimensions = w * LEFT_SHIFT12 + h;
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, near, far, disableDepthTestDistance, dimensions);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, near, far, disableDepthTestDistance, dimensions);
|
writer(i + 1, near, far, disableDepthTestDistance, dimensions);
|
writer(i + 2, near, far, disableDepthTestDistance, dimensions);
|
writer(i + 3, near, far, disableDepthTestDistance, dimensions);
|
}
|
}
|
|
function writeTextureCoordinateBoundsOrLabelTranslate(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
if (billboard.heightReference === HeightReference.CLAMP_TO_GROUND) {
|
billboardCollection._shaderClampToGround = billboardCollection._scene.context.depthTexture;
|
}
|
var i;
|
var writer = vafWriters[attributeLocations.textureCoordinateBoundsOrLabelTranslate];
|
|
if (ContextLimits.maximumVertexTextureImageUnits > 0) {
|
//write _labelTranslate, used by depth testing in the vertex shader
|
var translateX = 0;
|
var translateY = 0;
|
if (defined(billboard._labelTranslate)) {
|
translateX = billboard._labelTranslate.x;
|
translateY = billboard._labelTranslate.y;
|
}
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, translateX, translateY, 0.0, 0.0);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, translateX, translateY, 0.0, 0.0);
|
writer(i + 1, translateX, translateY, 0.0, 0.0);
|
writer(i + 2, translateX, translateY, 0.0, 0.0);
|
writer(i + 3, translateX, translateY, 0.0, 0.0);
|
}
|
return;
|
}
|
|
//write texture coordinate bounds, used by depth testing in fragment shader
|
var minX = 0;
|
var minY = 0;
|
var width = 0;
|
var height = 0;
|
var index = billboard._imageIndex;
|
if (index !== -1) {
|
var imageRectangle = textureAtlasCoordinates[index];
|
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(imageRectangle)) {
|
throw new DeveloperError('Invalid billboard image index: ' + index);
|
}
|
//>>includeEnd('debug');
|
|
minX = imageRectangle.x;
|
minY = imageRectangle.y;
|
width = imageRectangle.width;
|
height = imageRectangle.height;
|
}
|
var maxX = minX + width;
|
var maxY = minY + height;
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, minX, minY, maxX, maxY);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, minX, minY, maxX, maxY);
|
writer(i + 1, minX, minY, maxX, maxY);
|
writer(i + 2, minX, minY, maxX, maxY);
|
writer(i + 3, minX, minY, maxX, maxY);
|
}
|
}
|
|
function writeBatchId(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
if (!defined(billboardCollection._batchTable)) {
|
return;
|
}
|
|
var writer = vafWriters[attributeLocations.a_batchId];
|
var id = billboard._batchIndex;
|
|
var i;
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, id);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, id);
|
writer(i + 1, id);
|
writer(i + 2, id);
|
writer(i + 3, id);
|
}
|
}
|
|
function writeSDF(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
if (!billboardCollection._sdf) {
|
return;
|
}
|
|
var i;
|
var writer = vafWriters[attributeLocations.sdf];
|
|
var outlineColor = billboard.outlineColor;
|
var outlineWidth = billboard.outlineWidth;
|
|
var red = Color.floatToByte(outlineColor.red);
|
var green = Color.floatToByte(outlineColor.green);
|
var blue = Color.floatToByte(outlineColor.blue);
|
var compressed0 = red * LEFT_SHIFT16 + green * LEFT_SHIFT8 + blue;
|
|
// Compute the relative outline distance
|
var outlineDistance = outlineWidth / SDFSettings.RADIUS;
|
var compressed1 = Color.floatToByte(outlineColor.alpha) * LEFT_SHIFT16 + Color.floatToByte(outlineDistance) * LEFT_SHIFT8;
|
|
if (billboardCollection._instanced) {
|
i = billboard._index;
|
writer(i, compressed0, compressed1);
|
} else {
|
i = billboard._index * 4;
|
writer(i + 0, compressed0 + LOWER_LEFT, compressed1);
|
writer(i + 1, compressed0 + LOWER_RIGHT, compressed1);
|
writer(i + 2, compressed0 + UPPER_RIGHT, compressed1);
|
writer(i + 3, compressed0 + UPPER_LEFT, compressed1);
|
}
|
}
|
|
function writeBillboard(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard) {
|
writePositionScaleAndRotation(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeCompressedAttrib0(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeCompressedAttrib1(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeCompressedAttrib2(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeEyeOffset(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeScaleByDistance(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writePixelOffsetScaleByDistance(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeCompressedAttribute3(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeTextureCoordinateBoundsOrLabelTranslate(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeBatchId(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
writeSDF(billboardCollection, context, textureAtlasCoordinates, vafWriters, billboard);
|
}
|
|
function recomputeActualPositions(billboardCollection, billboards, length, frameState, modelMatrix, recomputeBoundingVolume) {
|
var boundingVolume;
|
if (frameState.mode === SceneMode.SCENE3D) {
|
boundingVolume = billboardCollection._baseVolume;
|
billboardCollection._boundingVolumeDirty = true;
|
} else {
|
boundingVolume = billboardCollection._baseVolume2D;
|
}
|
|
var positions = [];
|
for (var i = 0; i < length; ++i) {
|
var billboard = billboards[i];
|
var position = billboard.position;
|
var actualPosition = Billboard._computeActualPosition(billboard, position, frameState, modelMatrix);
|
if (defined(actualPosition)) {
|
billboard._setActualPosition(actualPosition);
|
|
if (recomputeBoundingVolume) {
|
positions.push(actualPosition);
|
} else {
|
BoundingSphere.expand(boundingVolume, actualPosition, boundingVolume);
|
}
|
}
|
}
|
|
if (recomputeBoundingVolume) {
|
BoundingSphere.fromPoints(positions, boundingVolume);
|
}
|
}
|
|
function updateMode(billboardCollection, frameState) {
|
var mode = frameState.mode;
|
|
var billboards = billboardCollection._billboards;
|
var billboardsToUpdate = billboardCollection._billboardsToUpdate;
|
var modelMatrix = billboardCollection._modelMatrix;
|
|
if (billboardCollection._createVertexArray ||
|
billboardCollection._mode !== mode ||
|
mode !== SceneMode.SCENE3D &&
|
!Matrix4.equals(modelMatrix, billboardCollection.modelMatrix)) {
|
|
billboardCollection._mode = mode;
|
Matrix4.clone(billboardCollection.modelMatrix, modelMatrix);
|
billboardCollection._createVertexArray = true;
|
|
if (mode === SceneMode.SCENE3D || mode === SceneMode.SCENE2D || mode === SceneMode.COLUMBUS_VIEW) {
|
recomputeActualPositions(billboardCollection, billboards, billboards.length, frameState, modelMatrix, true);
|
}
|
} else if (mode === SceneMode.MORPHING) {
|
recomputeActualPositions(billboardCollection, billboards, billboards.length, frameState, modelMatrix, true);
|
} else if (mode === SceneMode.SCENE2D || mode === SceneMode.COLUMBUS_VIEW) {
|
recomputeActualPositions(billboardCollection, billboardsToUpdate, billboardCollection._billboardsToUpdateIndex, frameState, modelMatrix, false);
|
}
|
}
|
|
function updateBoundingVolume(collection, frameState, boundingVolume) {
|
var pixelScale = 1.0;
|
if (!collection._allSizedInMeters || collection._maxPixelOffset !== 0.0) {
|
pixelScale = frameState.camera.getPixelSize(boundingVolume, frameState.context.drawingBufferWidth, frameState.context.drawingBufferHeight);
|
}
|
|
var size = pixelScale * collection._maxScale * collection._maxSize * 2.0;
|
if (collection._allHorizontalCenter && collection._allVerticalCenter) {
|
size *= 0.5;
|
}
|
|
var offset = pixelScale * collection._maxPixelOffset + collection._maxEyeOffset;
|
boundingVolume.radius += size + offset;
|
}
|
|
function createDebugCommand(billboardCollection, context) {
|
var fs;
|
fs = 'uniform sampler2D billboard_texture; \n' +
|
'varying vec2 v_textureCoordinates; \n' +
|
'void main() \n' +
|
'{ \n' +
|
' gl_FragColor = texture2D(billboard_texture, v_textureCoordinates); \n' +
|
'} \n';
|
|
var drawCommand = context.createViewportQuadCommand(fs, {
|
uniformMap : {
|
billboard_texture : function() {
|
return billboardCollection._textureAtlas.texture;
|
}
|
}
|
});
|
drawCommand.pass = Pass.OVERLAY;
|
return drawCommand;
|
}
|
|
var scratchWriterArray = [];
|
|
/**
|
* Called when {@link Viewer} or {@link CesiumWidget} render the scene to
|
* get the draw commands needed to render this primitive.
|
* <p>
|
* Do not call this function directly. This is documented just to
|
* list the exceptions that may be propagated when the scene is rendered:
|
* </p>
|
*
|
* @exception {RuntimeError} image with id must be in the atlas.
|
*/
|
BillboardCollection.prototype.update = function(frameState) {
|
removeBillboards(this);
|
var billboards = this._billboards;
|
var billboardsLength = billboards.length;
|
|
var context = frameState.context;
|
this._instanced = context.instancedArrays;
|
attributeLocations = this._instanced ? attributeLocationsInstanced : attributeLocationsBatched;
|
getIndexBuffer = this._instanced ? getIndexBufferInstanced : getIndexBufferBatched;
|
|
var textureAtlas = this._textureAtlas;
|
if (!defined(textureAtlas)) {
|
textureAtlas = this._textureAtlas = new TextureAtlas({
|
context : context
|
});
|
|
for (var ii = 0; ii < billboardsLength; ++ii) {
|
billboards[ii]._loadImage();
|
}
|
}
|
|
var textureAtlasCoordinates = textureAtlas.textureCoordinates;
|
if (textureAtlasCoordinates.length === 0) {
|
// Can't write billboard vertices until we have texture coordinates
|
// provided by a texture atlas
|
return;
|
}
|
|
updateMode(this, frameState);
|
|
billboards = this._billboards;
|
billboardsLength = billboards.length;
|
var billboardsToUpdate = this._billboardsToUpdate;
|
var billboardsToUpdateLength = this._billboardsToUpdateIndex;
|
|
var properties = this._propertiesChanged;
|
|
var textureAtlasGUID = textureAtlas.guid;
|
var createVertexArray = this._createVertexArray || this._textureAtlasGUID !== textureAtlasGUID;
|
this._textureAtlasGUID = textureAtlasGUID;
|
|
var vafWriters;
|
var pass = frameState.passes;
|
var picking = pass.pick;
|
|
// PERFORMANCE_IDEA: Round robin multiple buffers.
|
if (createVertexArray || (!picking && this.computeNewBuffersUsage())) {
|
this._createVertexArray = false;
|
|
for (var k = 0; k < NUMBER_OF_PROPERTIES; ++k) {
|
properties[k] = 0;
|
}
|
|
this._vaf = this._vaf && this._vaf.destroy();
|
|
if (billboardsLength > 0) {
|
// PERFORMANCE_IDEA: Instead of creating a new one, resize like std::vector.
|
this._vaf = createVAF(context, billboardsLength, this._buffersUsage, this._instanced, this._batchTable, this._sdf);
|
vafWriters = this._vaf.writers;
|
|
// Rewrite entire buffer if billboards were added or removed.
|
for (var i = 0; i < billboardsLength; ++i) {
|
var billboard = this._billboards[i];
|
billboard._dirty = false; // In case it needed an update.
|
writeBillboard(this, context, textureAtlasCoordinates, vafWriters, billboard);
|
}
|
|
// Different billboard collections share the same index buffer.
|
this._vaf.commit(getIndexBuffer(context));
|
}
|
|
this._billboardsToUpdateIndex = 0;
|
} else if (billboardsToUpdateLength > 0) {
|
// Billboards were modified, but none were added or removed.
|
var writers = scratchWriterArray;
|
writers.length = 0;
|
|
if (properties[POSITION_INDEX] || properties[ROTATION_INDEX] || properties[SCALE_INDEX]) {
|
writers.push(writePositionScaleAndRotation);
|
}
|
|
if (properties[IMAGE_INDEX_INDEX] || properties[PIXEL_OFFSET_INDEX] || properties[HORIZONTAL_ORIGIN_INDEX] || properties[VERTICAL_ORIGIN_INDEX] || properties[SHOW_INDEX]) {
|
writers.push(writeCompressedAttrib0);
|
if (this._instanced) {
|
writers.push(writeEyeOffset);
|
}
|
}
|
|
if (properties[IMAGE_INDEX_INDEX] || properties[ALIGNED_AXIS_INDEX] || properties[TRANSLUCENCY_BY_DISTANCE_INDEX]) {
|
writers.push(writeCompressedAttrib1);
|
writers.push(writeCompressedAttrib2);
|
}
|
|
if (properties[IMAGE_INDEX_INDEX] || properties[COLOR_INDEX]) {
|
writers.push(writeCompressedAttrib2);
|
}
|
|
if (properties[EYE_OFFSET_INDEX]) {
|
writers.push(writeEyeOffset);
|
}
|
|
if (properties[SCALE_BY_DISTANCE_INDEX]) {
|
writers.push(writeScaleByDistance);
|
}
|
|
if (properties[PIXEL_OFFSET_SCALE_BY_DISTANCE_INDEX]) {
|
writers.push(writePixelOffsetScaleByDistance);
|
}
|
|
if (properties[DISTANCE_DISPLAY_CONDITION_INDEX] || properties[DISABLE_DEPTH_DISTANCE] || properties[IMAGE_INDEX_INDEX] || properties[POSITION_INDEX]) {
|
writers.push(writeCompressedAttribute3);
|
}
|
|
if (properties[IMAGE_INDEX_INDEX] || properties[POSITION_INDEX]) {
|
writers.push(writeTextureCoordinateBoundsOrLabelTranslate);
|
}
|
|
if (properties[SDF_INDEX]) {
|
writers.push(writeSDF);
|
}
|
|
var numWriters = writers.length;
|
vafWriters = this._vaf.writers;
|
|
if ((billboardsToUpdateLength / billboardsLength) > 0.1) {
|
// If more than 10% of billboard change, rewrite the entire buffer.
|
|
// PERFORMANCE_IDEA: I totally made up 10% :).
|
|
for (var m = 0; m < billboardsToUpdateLength; ++m) {
|
var b = billboardsToUpdate[m];
|
b._dirty = false;
|
|
for (var n = 0; n < numWriters; ++n) {
|
writers[n](this, context, textureAtlasCoordinates, vafWriters, b);
|
}
|
}
|
this._vaf.commit(getIndexBuffer(context));
|
} else {
|
for (var h = 0; h < billboardsToUpdateLength; ++h) {
|
var bb = billboardsToUpdate[h];
|
bb._dirty = false;
|
|
for (var o = 0; o < numWriters; ++o) {
|
writers[o](this, context, textureAtlasCoordinates, vafWriters, bb);
|
}
|
|
if (this._instanced) {
|
this._vaf.subCommit(bb._index, 1);
|
} else {
|
this._vaf.subCommit(bb._index * 4, 4);
|
}
|
}
|
this._vaf.endSubCommits();
|
}
|
|
this._billboardsToUpdateIndex = 0;
|
}
|
|
// If the number of total billboards ever shrinks considerably
|
// Truncate billboardsToUpdate so that we free memory that we're
|
// not going to be using.
|
if (billboardsToUpdateLength > billboardsLength * 1.5) {
|
billboardsToUpdate.length = billboardsLength;
|
}
|
|
if (!defined(this._vaf) || !defined(this._vaf.va)) {
|
return;
|
}
|
|
if (this._boundingVolumeDirty) {
|
this._boundingVolumeDirty = false;
|
BoundingSphere.transform(this._baseVolume, this.modelMatrix, this._baseVolumeWC);
|
}
|
|
var boundingVolume;
|
var modelMatrix = Matrix4.IDENTITY;
|
if (frameState.mode === SceneMode.SCENE3D) {
|
modelMatrix = this.modelMatrix;
|
boundingVolume = BoundingSphere.clone(this._baseVolumeWC, this._boundingVolume);
|
} else {
|
boundingVolume = BoundingSphere.clone(this._baseVolume2D, this._boundingVolume);
|
}
|
updateBoundingVolume(this, frameState, boundingVolume);
|
|
var blendOptionChanged = this._blendOption !== this.blendOption;
|
this._blendOption = this.blendOption;
|
|
if (blendOptionChanged) {
|
if (this._blendOption === BlendOption.OPAQUE || this._blendOption === BlendOption.OPAQUE_AND_TRANSLUCENT) {
|
this._rsOpaque = RenderState.fromCache({
|
depthTest : {
|
enabled : true,
|
func : WebGLConstants.LESS
|
},
|
depthMask : true
|
});
|
} else {
|
this._rsOpaque = undefined;
|
}
|
|
// If OPAQUE_AND_TRANSLUCENT is in use, only the opaque pass gets the benefit of the depth buffer,
|
// not the translucent pass. Otherwise, if the TRANSLUCENT pass is on its own, it turns on
|
// a depthMask in lieu of full depth sorting (because it has opaque-ish fragments that look bad in OIT).
|
// When the TRANSLUCENT depth mask is in use, label backgrounds require the depth func to be LEQUAL.
|
var useTranslucentDepthMask = this._blendOption === BlendOption.TRANSLUCENT;
|
|
if (this._blendOption === BlendOption.TRANSLUCENT || this._blendOption === BlendOption.OPAQUE_AND_TRANSLUCENT) {
|
this._rsTranslucent = RenderState.fromCache({
|
depthTest : {
|
enabled : true,
|
func : (useTranslucentDepthMask ? WebGLConstants.LEQUAL : WebGLConstants.LESS)
|
},
|
depthMask : useTranslucentDepthMask,
|
blending : BlendingState.ALPHA_BLEND
|
});
|
} else {
|
this._rsTranslucent = undefined;
|
}
|
}
|
|
this._shaderDisableDepthDistance = this._shaderDisableDepthDistance || frameState.minimumDisableDepthTestDistance !== 0.0;
|
|
var vsSource;
|
var fsSource;
|
var vs;
|
var fs;
|
var vertDefines;
|
|
var supportVSTextureReads = ContextLimits.maximumVertexTextureImageUnits > 0;
|
|
if (blendOptionChanged ||
|
(this._shaderRotation !== this._compiledShaderRotation) ||
|
(this._shaderAlignedAxis !== this._compiledShaderAlignedAxis) ||
|
(this._shaderScaleByDistance !== this._compiledShaderScaleByDistance) ||
|
(this._shaderTranslucencyByDistance !== this._compiledShaderTranslucencyByDistance) ||
|
(this._shaderPixelOffsetScaleByDistance !== this._compiledShaderPixelOffsetScaleByDistance) ||
|
(this._shaderDistanceDisplayCondition !== this._compiledShaderDistanceDisplayCondition) ||
|
(this._shaderDisableDepthDistance !== this._compiledShaderDisableDepthDistance) ||
|
(this._shaderClampToGround !== this._compiledShaderClampToGround) ||
|
(this._sdf !== this._compiledSDF)) {
|
|
vsSource = BillboardCollectionVS;
|
fsSource = BillboardCollectionFS;
|
|
vertDefines = [];
|
if (defined(this._batchTable)) {
|
vertDefines.push('VECTOR_TILE');
|
vsSource = this._batchTable.getVertexShaderCallback(false, 'a_batchId', undefined)(vsSource);
|
fsSource = this._batchTable.getFragmentShaderCallback(false, undefined)(fsSource);
|
}
|
|
vs = new ShaderSource({
|
defines : vertDefines,
|
sources : [vsSource]
|
});
|
if (this._instanced) {
|
vs.defines.push('INSTANCED');
|
}
|
if (this._shaderRotation) {
|
vs.defines.push('ROTATION');
|
}
|
if (this._shaderAlignedAxis) {
|
vs.defines.push('ALIGNED_AXIS');
|
}
|
if (this._shaderScaleByDistance) {
|
vs.defines.push('EYE_DISTANCE_SCALING');
|
}
|
if (this._shaderTranslucencyByDistance) {
|
vs.defines.push('EYE_DISTANCE_TRANSLUCENCY');
|
}
|
if (this._shaderPixelOffsetScaleByDistance) {
|
vs.defines.push('EYE_DISTANCE_PIXEL_OFFSET');
|
}
|
if (this._shaderDistanceDisplayCondition) {
|
vs.defines.push('DISTANCE_DISPLAY_CONDITION');
|
}
|
if (this._shaderDisableDepthDistance) {
|
vs.defines.push('DISABLE_DEPTH_DISTANCE');
|
}
|
if (this._shaderClampToGround) {
|
if (supportVSTextureReads) {
|
vs.defines.push('VERTEX_DEPTH_CHECK');
|
} else {
|
vs.defines.push('FRAGMENT_DEPTH_CHECK');
|
}
|
}
|
|
var sdfEdge = 1.0 - SDFSettings.CUTOFF;
|
|
if (this._sdf) {
|
vs.defines.push('SDF');
|
}
|
|
var vectorFragDefine = defined(this._batchTable) ? 'VECTOR_TILE' : '';
|
|
if (this._blendOption === BlendOption.OPAQUE_AND_TRANSLUCENT) {
|
fs = new ShaderSource({
|
defines : ['OPAQUE', vectorFragDefine],
|
sources : [fsSource]
|
});
|
if (this._shaderClampToGround) {
|
if (supportVSTextureReads) {
|
fs.defines.push('VERTEX_DEPTH_CHECK');
|
} else {
|
fs.defines.push('FRAGMENT_DEPTH_CHECK');
|
}
|
}
|
|
if (this._sdf) {
|
fs.defines.push('SDF');
|
fs.defines.push('SDF_EDGE ' + sdfEdge);
|
}
|
|
this._sp = ShaderProgram.replaceCache({
|
context : context,
|
shaderProgram : this._sp,
|
vertexShaderSource : vs,
|
fragmentShaderSource : fs,
|
attributeLocations : attributeLocations
|
});
|
|
fs = new ShaderSource({
|
defines : ['TRANSLUCENT', vectorFragDefine],
|
sources : [fsSource]
|
});
|
if (this._shaderClampToGround) {
|
if (supportVSTextureReads) {
|
fs.defines.push('VERTEX_DEPTH_CHECK');
|
} else {
|
fs.defines.push('FRAGMENT_DEPTH_CHECK');
|
}
|
}
|
if (this._sdf) {
|
fs.defines.push('SDF');
|
fs.defines.push('SDF_EDGE ' + sdfEdge);
|
}
|
this._spTranslucent = ShaderProgram.replaceCache({
|
context : context,
|
shaderProgram : this._spTranslucent,
|
vertexShaderSource : vs,
|
fragmentShaderSource : fs,
|
attributeLocations : attributeLocations
|
});
|
}
|
|
if (this._blendOption === BlendOption.OPAQUE) {
|
fs = new ShaderSource({
|
defines : [vectorFragDefine],
|
sources : [fsSource]
|
});
|
if (this._shaderClampToGround) {
|
if (supportVSTextureReads) {
|
fs.defines.push('VERTEX_DEPTH_CHECK');
|
} else {
|
fs.defines.push('FRAGMENT_DEPTH_CHECK');
|
}
|
}
|
if (this._sdf) {
|
fs.defines.push('SDF');
|
fs.defines.push('SDF_EDGE ' + sdfEdge);
|
}
|
this._sp = ShaderProgram.replaceCache({
|
context : context,
|
shaderProgram : this._sp,
|
vertexShaderSource : vs,
|
fragmentShaderSource : fs,
|
attributeLocations : attributeLocations
|
});
|
}
|
|
if (this._blendOption === BlendOption.TRANSLUCENT) {
|
fs = new ShaderSource({
|
defines : [vectorFragDefine],
|
sources : [fsSource]
|
});
|
if (this._shaderClampToGround) {
|
if (supportVSTextureReads) {
|
fs.defines.push('VERTEX_DEPTH_CHECK');
|
} else {
|
fs.defines.push('FRAGMENT_DEPTH_CHECK');
|
}
|
}
|
if (this._sdf) {
|
fs.defines.push('SDF');
|
fs.defines.push('SDF_EDGE ' + sdfEdge);
|
}
|
this._spTranslucent = ShaderProgram.replaceCache({
|
context : context,
|
shaderProgram : this._spTranslucent,
|
vertexShaderSource : vs,
|
fragmentShaderSource : fs,
|
attributeLocations : attributeLocations
|
});
|
}
|
|
this._compiledShaderRotation = this._shaderRotation;
|
this._compiledShaderAlignedAxis = this._shaderAlignedAxis;
|
this._compiledShaderScaleByDistance = this._shaderScaleByDistance;
|
this._compiledShaderTranslucencyByDistance = this._shaderTranslucencyByDistance;
|
this._compiledShaderPixelOffsetScaleByDistance = this._shaderPixelOffsetScaleByDistance;
|
this._compiledShaderDistanceDisplayCondition = this._shaderDistanceDisplayCondition;
|
this._compiledShaderDisableDepthDistance = this._shaderDisableDepthDistance;
|
this._compiledShaderClampToGround = this._shaderClampToGround;
|
this._compiledSDF = this._sdf;
|
}
|
|
var commandList = frameState.commandList;
|
|
if (pass.render || pass.pick) {
|
var colorList = this._colorCommands;
|
|
var opaque = this._blendOption === BlendOption.OPAQUE;
|
var opaqueAndTranslucent = this._blendOption === BlendOption.OPAQUE_AND_TRANSLUCENT;
|
|
var va = this._vaf.va;
|
var vaLength = va.length;
|
|
var uniforms = this._uniforms;
|
var pickId;
|
if (defined(this._batchTable)) {
|
uniforms = this._batchTable.getUniformMapCallback()(uniforms);
|
pickId = this._batchTable.getPickId();
|
} else {
|
pickId = 'v_pickColor';
|
}
|
|
colorList.length = vaLength;
|
var totalLength = opaqueAndTranslucent ? vaLength * 2 : vaLength;
|
for (var j = 0; j < totalLength; ++j) {
|
var command = colorList[j];
|
if (!defined(command)) {
|
command = colorList[j] = new DrawCommand();
|
}
|
|
var opaqueCommand = opaque || (opaqueAndTranslucent && j % 2 === 0);
|
|
command.pass = opaqueCommand || !opaqueAndTranslucent ? Pass.OPAQUE : Pass.TRANSLUCENT;
|
command.owner = this;
|
|
var index = opaqueAndTranslucent ? Math.floor(j / 2.0) : j;
|
command.boundingVolume = boundingVolume;
|
command.modelMatrix = modelMatrix;
|
command.count = va[index].indicesCount;
|
command.shaderProgram = opaqueCommand ? this._sp : this._spTranslucent;
|
command.uniformMap = uniforms;
|
command.vertexArray = va[index].va;
|
command.renderState = opaqueCommand ? this._rsOpaque : this._rsTranslucent;
|
command.debugShowBoundingVolume = this.debugShowBoundingVolume;
|
command.pickId = pickId;
|
|
if (this._instanced) {
|
command.count = 6;
|
command.instanceCount = billboardsLength;
|
}
|
|
commandList.push(command);
|
}
|
|
if (this.debugShowTextureAtlas) {
|
if (!defined(this.debugCommand)) {
|
this.debugCommand = createDebugCommand(this, frameState.context);
|
}
|
|
commandList.push(this.debugCommand);
|
}
|
}
|
};
|
|
/**
|
* 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 BillboardCollection#destroy
|
*/
|
BillboardCollection.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
|
* billboards = billboards && billboards.destroy();
|
*
|
* @see BillboardCollection#isDestroyed
|
*/
|
BillboardCollection.prototype.destroy = function() {
|
if (defined(this._removeCallbackFunc)) {
|
this._removeCallbackFunc();
|
this._removeCallbackFunc = undefined;
|
}
|
|
this._textureAtlas = this._destroyTextureAtlas && this._textureAtlas && this._textureAtlas.destroy();
|
this._sp = this._sp && this._sp.destroy();
|
this._spTranslucent = this._spTranslucent && this._spTranslucent.destroy();
|
this._vaf = this._vaf && this._vaf.destroy();
|
destroyBillboards(this._billboards);
|
|
return destroyObject(this);
|
};
|
export default BillboardCollection;
|
