import AttributeCompression from '../Core/AttributeCompression.js';
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import Cartesian3 from '../Core/Cartesian3.js';
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import Color from '../Core/Color.js';
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import ComponentDatatype from '../Core/ComponentDatatype.js';
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import defaultValue from '../Core/defaultValue.js';
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import defined from '../Core/defined.js';
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import deprecationWarning from '../Core/deprecationWarning.js';
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import destroyObject from '../Core/destroyObject.js';
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import DeveloperError from '../Core/DeveloperError.js';
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import Ellipsoid from '../Core/Ellipsoid.js';
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import getStringFromTypedArray from '../Core/getStringFromTypedArray.js';
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import Matrix3 from '../Core/Matrix3.js';
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import Matrix4 from '../Core/Matrix4.js';
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import Quaternion from '../Core/Quaternion.js';
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import RequestType from '../Core/RequestType.js';
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import RuntimeError from '../Core/RuntimeError.js';
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import Transforms from '../Core/Transforms.js';
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import TranslationRotationScale from '../Core/TranslationRotationScale.js';
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import Pass from '../Renderer/Pass.js';
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import Axis from './Axis.js';
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import Cesium3DTileBatchTable from './Cesium3DTileBatchTable.js';
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import Cesium3DTileFeature from './Cesium3DTileFeature.js';
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import Cesium3DTileFeatureTable from './Cesium3DTileFeatureTable.js';
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import ModelInstanceCollection from './ModelInstanceCollection.js';
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/**
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* Represents the contents of a
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* {@link https://github.com/CesiumGS/3d-tiles/tree/master/specification/TileFormats/Instanced3DModel|Instanced 3D Model}
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* tile in a {@link https://github.com/CesiumGS/3d-tiles/tree/master/specification|3D Tiles} tileset.
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* <p>
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* Implements the {@link Cesium3DTileContent} interface.
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* </p>
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*
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* @alias Instanced3DModel3DTileContent
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* @constructor
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*
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* @private
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*/
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function Instanced3DModel3DTileContent(tileset, tile, resource, arrayBuffer, byteOffset) {
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this._tileset = tileset;
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this._tile = tile;
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this._resource = resource;
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this._modelInstanceCollection = undefined;
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this._batchTable = undefined;
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this._features = undefined;
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this.featurePropertiesDirty = false;
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initialize(this, arrayBuffer, byteOffset);
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}
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// This can be overridden for testing purposes
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Instanced3DModel3DTileContent._deprecationWarning = deprecationWarning;
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Object.defineProperties(Instanced3DModel3DTileContent.prototype, {
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featuresLength : {
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get : function() {
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return this._batchTable.featuresLength;
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}
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},
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pointsLength : {
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get : function() {
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return 0;
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}
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},
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trianglesLength : {
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get : function() {
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var model = this._modelInstanceCollection._model;
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if (defined(model)) {
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return model.trianglesLength;
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}
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return 0;
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}
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},
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geometryByteLength : {
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get : function() {
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var model = this._modelInstanceCollection._model;
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if (defined(model)) {
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return model.geometryByteLength;
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}
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return 0;
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}
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},
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texturesByteLength : {
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get : function() {
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var model = this._modelInstanceCollection._model;
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if (defined(model)) {
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return model.texturesByteLength;
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}
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return 0;
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}
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},
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batchTableByteLength : {
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get : function() {
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return this._batchTable.memorySizeInBytes;
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}
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},
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innerContents : {
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get : function() {
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return undefined;
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}
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},
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readyPromise : {
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get : function() {
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return this._modelInstanceCollection.readyPromise;
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}
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},
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tileset : {
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get : function() {
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return this._tileset;
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}
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},
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tile : {
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get : function() {
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return this._tile;
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}
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},
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url: {
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get: function() {
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return this._resource.getUrlComponent(true);
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}
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},
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batchTable : {
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get : function() {
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return this._batchTable;
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}
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}
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});
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function getPickIdCallback(content) {
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return function() {
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return content._batchTable.getPickId();
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};
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}
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var sizeOfUint32 = Uint32Array.BYTES_PER_ELEMENT;
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var propertyScratch1 = new Array(4);
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var propertyScratch2 = new Array(4);
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function initialize(content, arrayBuffer, byteOffset) {
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var byteStart = defaultValue(byteOffset, 0);
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byteOffset = byteStart;
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var uint8Array = new Uint8Array(arrayBuffer);
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var view = new DataView(arrayBuffer);
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byteOffset += sizeOfUint32; // Skip magic
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var version = view.getUint32(byteOffset, true);
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if (version !== 1) {
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throw new RuntimeError('Only Instanced 3D Model version 1 is supported. Version ' + version + ' is not.');
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}
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byteOffset += sizeOfUint32;
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var byteLength = view.getUint32(byteOffset, true);
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byteOffset += sizeOfUint32;
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var featureTableJsonByteLength = view.getUint32(byteOffset, true);
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if (featureTableJsonByteLength === 0) {
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throw new RuntimeError('featureTableJsonByteLength is zero, the feature table must be defined.');
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}
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byteOffset += sizeOfUint32;
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var featureTableBinaryByteLength = view.getUint32(byteOffset, true);
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byteOffset += sizeOfUint32;
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var batchTableJsonByteLength = view.getUint32(byteOffset, true);
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byteOffset += sizeOfUint32;
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var batchTableBinaryByteLength = view.getUint32(byteOffset, true);
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byteOffset += sizeOfUint32;
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var gltfFormat = view.getUint32(byteOffset, true);
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if (gltfFormat !== 1 && gltfFormat !== 0) {
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throw new RuntimeError('Only glTF format 0 (uri) or 1 (embedded) are supported. Format ' + gltfFormat + ' is not.');
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}
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byteOffset += sizeOfUint32;
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var featureTableString = getStringFromTypedArray(uint8Array, byteOffset, featureTableJsonByteLength);
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var featureTableJson = JSON.parse(featureTableString);
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byteOffset += featureTableJsonByteLength;
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var featureTableBinary = new Uint8Array(arrayBuffer, byteOffset, featureTableBinaryByteLength);
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byteOffset += featureTableBinaryByteLength;
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var featureTable = new Cesium3DTileFeatureTable(featureTableJson, featureTableBinary);
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var instancesLength = featureTable.getGlobalProperty('INSTANCES_LENGTH');
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featureTable.featuresLength = instancesLength;
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if (!defined(instancesLength)) {
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throw new RuntimeError('Feature table global property: INSTANCES_LENGTH must be defined');
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}
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var batchTableJson;
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var batchTableBinary;
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if (batchTableJsonByteLength > 0) {
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var batchTableString = getStringFromTypedArray(uint8Array, byteOffset, batchTableJsonByteLength);
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batchTableJson = JSON.parse(batchTableString);
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byteOffset += batchTableJsonByteLength;
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if (batchTableBinaryByteLength > 0) {
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// Has a batch table binary
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batchTableBinary = new Uint8Array(arrayBuffer, byteOffset, batchTableBinaryByteLength);
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// Copy the batchTableBinary section and let the underlying ArrayBuffer be freed
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batchTableBinary = new Uint8Array(batchTableBinary);
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byteOffset += batchTableBinaryByteLength;
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}
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}
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content._batchTable = new Cesium3DTileBatchTable(content, instancesLength, batchTableJson, batchTableBinary);
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var gltfByteLength = byteStart + byteLength - byteOffset;
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if (gltfByteLength === 0) {
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throw new RuntimeError('glTF byte length is zero, i3dm must have a glTF to instance.');
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}
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var gltfView;
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if (byteOffset % 4 === 0) {
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gltfView = new Uint8Array(arrayBuffer, byteOffset, gltfByteLength);
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} else {
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// Create a copy of the glb so that it is 4-byte aligned
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Instanced3DModel3DTileContent._deprecationWarning('i3dm-glb-unaligned', 'The embedded glb is not aligned to a 4-byte boundary.');
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gltfView = new Uint8Array(uint8Array.subarray(byteOffset, byteOffset + gltfByteLength));
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}
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var tileset = content._tileset;
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// Create model instance collection
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var collectionOptions = {
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instances : new Array(instancesLength),
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batchTable : content._batchTable,
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cull : false, // Already culled by 3D Tiles
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url : undefined,
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requestType : RequestType.TILES3D,
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gltf : undefined,
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basePath : undefined,
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incrementallyLoadTextures : false,
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upAxis : tileset._gltfUpAxis,
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forwardAxis : Axis.X,
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opaquePass : Pass.CESIUM_3D_TILE, // Draw opaque portions during the 3D Tiles pass
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pickIdLoaded : getPickIdCallback(content),
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imageBasedLightingFactor : tileset.imageBasedLightingFactor,
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lightColor : tileset.lightColor,
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luminanceAtZenith : tileset.luminanceAtZenith,
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sphericalHarmonicCoefficients : tileset.sphericalHarmonicCoefficients,
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specularEnvironmentMaps : tileset.specularEnvironmentMaps
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};
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if (gltfFormat === 0) {
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var gltfUrl = getStringFromTypedArray(gltfView);
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// We need to remove padding from the end of the model URL in case this tile was part of a composite tile.
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// This removes all white space and null characters from the end of the string.
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gltfUrl = gltfUrl.replace(/[\s\0]+$/, '');
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collectionOptions.url = content._resource.getDerivedResource({
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url: gltfUrl
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});
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} else {
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collectionOptions.gltf = gltfView;
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collectionOptions.basePath = content._resource.clone();
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}
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var eastNorthUp = featureTable.getGlobalProperty('EAST_NORTH_UP');
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var rtcCenter;
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var rtcCenterArray = featureTable.getGlobalProperty('RTC_CENTER', ComponentDatatype.FLOAT, 3);
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if (defined(rtcCenterArray)) {
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rtcCenter = Cartesian3.unpack(rtcCenterArray);
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}
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var instances = collectionOptions.instances;
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var instancePosition = new Cartesian3();
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var instancePositionArray = new Array(3);
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var instanceNormalRight = new Cartesian3();
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var instanceNormalUp = new Cartesian3();
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var instanceNormalForward = new Cartesian3();
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var instanceRotation = new Matrix3();
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var instanceQuaternion = new Quaternion();
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var instanceScale = new Cartesian3();
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var instanceTranslationRotationScale = new TranslationRotationScale();
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var instanceTransform = new Matrix4();
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for (var i = 0; i < instancesLength; i++) {
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// Get the instance position
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var position = featureTable.getProperty('POSITION', ComponentDatatype.FLOAT, 3, i, propertyScratch1);
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if (!defined(position)) {
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position = instancePositionArray;
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var positionQuantized = featureTable.getProperty('POSITION_QUANTIZED', ComponentDatatype.UNSIGNED_SHORT, 3, i, propertyScratch1);
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if (!defined(positionQuantized)) {
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throw new RuntimeError('Either POSITION or POSITION_QUANTIZED must be defined for each instance.');
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}
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var quantizedVolumeOffset = featureTable.getGlobalProperty('QUANTIZED_VOLUME_OFFSET', ComponentDatatype.FLOAT, 3);
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if (!defined(quantizedVolumeOffset)) {
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throw new RuntimeError('Global property: QUANTIZED_VOLUME_OFFSET must be defined for quantized positions.');
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}
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var quantizedVolumeScale = featureTable.getGlobalProperty('QUANTIZED_VOLUME_SCALE', ComponentDatatype.FLOAT, 3);
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if (!defined(quantizedVolumeScale)) {
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throw new RuntimeError('Global property: QUANTIZED_VOLUME_SCALE must be defined for quantized positions.');
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}
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for (var j = 0; j < 3; j++) {
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position[j] = (positionQuantized[j] / 65535.0 * quantizedVolumeScale[j]) + quantizedVolumeOffset[j];
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}
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}
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Cartesian3.unpack(position, 0, instancePosition);
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if (defined(rtcCenter)) {
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Cartesian3.add(instancePosition, rtcCenter, instancePosition);
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}
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instanceTranslationRotationScale.translation = instancePosition;
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// Get the instance rotation
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var normalUp = featureTable.getProperty('NORMAL_UP', ComponentDatatype.FLOAT, 3, i, propertyScratch1);
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var normalRight = featureTable.getProperty('NORMAL_RIGHT', ComponentDatatype.FLOAT, 3, i, propertyScratch2);
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var hasCustomOrientation = false;
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if (defined(normalUp)) {
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if (!defined(normalRight)) {
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throw new RuntimeError('To define a custom orientation, both NORMAL_UP and NORMAL_RIGHT must be defined.');
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}
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Cartesian3.unpack(normalUp, 0, instanceNormalUp);
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Cartesian3.unpack(normalRight, 0, instanceNormalRight);
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hasCustomOrientation = true;
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} else {
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var octNormalUp = featureTable.getProperty('NORMAL_UP_OCT32P', ComponentDatatype.UNSIGNED_SHORT, 2, i, propertyScratch1);
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var octNormalRight = featureTable.getProperty('NORMAL_RIGHT_OCT32P', ComponentDatatype.UNSIGNED_SHORT, 2, i, propertyScratch2);
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if (defined(octNormalUp)) {
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if (!defined(octNormalRight)) {
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throw new RuntimeError('To define a custom orientation with oct-encoded vectors, both NORMAL_UP_OCT32P and NORMAL_RIGHT_OCT32P must be defined.');
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}
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AttributeCompression.octDecodeInRange(octNormalUp[0], octNormalUp[1], 65535, instanceNormalUp);
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AttributeCompression.octDecodeInRange(octNormalRight[0], octNormalRight[1], 65535, instanceNormalRight);
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hasCustomOrientation = true;
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} else if (eastNorthUp) {
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Transforms.eastNorthUpToFixedFrame(instancePosition, Ellipsoid.WGS84, instanceTransform);
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Matrix4.getMatrix3(instanceTransform, instanceRotation);
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} else {
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Matrix3.clone(Matrix3.IDENTITY, instanceRotation);
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}
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}
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if (hasCustomOrientation) {
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Cartesian3.cross(instanceNormalRight, instanceNormalUp, instanceNormalForward);
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Cartesian3.normalize(instanceNormalForward, instanceNormalForward);
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Matrix3.setColumn(instanceRotation, 0, instanceNormalRight, instanceRotation);
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Matrix3.setColumn(instanceRotation, 1, instanceNormalUp, instanceRotation);
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Matrix3.setColumn(instanceRotation, 2, instanceNormalForward, instanceRotation);
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}
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Quaternion.fromRotationMatrix(instanceRotation, instanceQuaternion);
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instanceTranslationRotationScale.rotation = instanceQuaternion;
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// Get the instance scale
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instanceScale = Cartesian3.fromElements(1.0, 1.0, 1.0, instanceScale);
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var scale = featureTable.getProperty('SCALE', ComponentDatatype.FLOAT, 1, i);
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if (defined(scale)) {
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Cartesian3.multiplyByScalar(instanceScale, scale, instanceScale);
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}
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var nonUniformScale = featureTable.getProperty('SCALE_NON_UNIFORM', ComponentDatatype.FLOAT, 3, i, propertyScratch1);
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if (defined(nonUniformScale)) {
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instanceScale.x *= nonUniformScale[0];
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instanceScale.y *= nonUniformScale[1];
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instanceScale.z *= nonUniformScale[2];
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}
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instanceTranslationRotationScale.scale = instanceScale;
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// Get the batchId
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var batchId = featureTable.getProperty('BATCH_ID', ComponentDatatype.UNSIGNED_SHORT, 1, i);
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if (!defined(batchId)) {
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// If BATCH_ID semantic is undefined, batchId is just the instance number
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batchId = i;
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}
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// Create the model matrix and the instance
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Matrix4.fromTranslationRotationScale(instanceTranslationRotationScale, instanceTransform);
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var modelMatrix = instanceTransform.clone();
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instances[i] = {
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modelMatrix : modelMatrix,
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batchId : batchId
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};
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}
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content._modelInstanceCollection = new ModelInstanceCollection(collectionOptions);
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}
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function createFeatures(content) {
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var featuresLength = content.featuresLength;
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if (!defined(content._features) && (featuresLength > 0)) {
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var features = new Array(featuresLength);
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for (var i = 0; i < featuresLength; ++i) {
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features[i] = new Cesium3DTileFeature(content, i);
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}
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content._features = features;
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}
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}
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Instanced3DModel3DTileContent.prototype.hasProperty = function(batchId, name) {
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return this._batchTable.hasProperty(batchId, name);
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};
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Instanced3DModel3DTileContent.prototype.getFeature = function(batchId) {
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var featuresLength = this.featuresLength;
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//>>includeStart('debug', pragmas.debug);
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if (!defined(batchId) || (batchId < 0) || (batchId >= featuresLength)) {
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throw new DeveloperError('batchId is required and between zero and featuresLength - 1 (' + (featuresLength - 1) + ').');
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}
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//>>includeEnd('debug');
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createFeatures(this);
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return this._features[batchId];
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};
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Instanced3DModel3DTileContent.prototype.applyDebugSettings = function(enabled, color) {
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color = enabled ? color : Color.WHITE;
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this._batchTable.setAllColor(color);
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};
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Instanced3DModel3DTileContent.prototype.applyStyle = function(style) {
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this._batchTable.applyStyle(style);
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};
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Instanced3DModel3DTileContent.prototype.update = function(tileset, frameState) {
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var commandStart = frameState.commandList.length;
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// In the PROCESSING state we may be calling update() to move forward
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// the content's resource loading. In the READY state, it will
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// actually generate commands.
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this._batchTable.update(tileset, frameState);
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this._modelInstanceCollection.modelMatrix = this._tile.computedTransform;
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this._modelInstanceCollection.shadows = this._tileset.shadows;
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this._modelInstanceCollection.lightColor = this._tileset.lightColor;
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this._modelInstanceCollection.luminanceAtZenith = this._tileset.luminanceAtZenith;
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this._modelInstanceCollection.sphericalHarmonicCoefficients = this._tileset.sphericalHarmonicCoefficients;
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this._modelInstanceCollection.specularEnvironmentMaps = this._tileset.specularEnvironmentMaps;
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this._modelInstanceCollection.debugWireframe = this._tileset.debugWireframe;
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var model = this._modelInstanceCollection._model;
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if (defined(model)) {
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// Update for clipping planes
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var tilesetClippingPlanes = this._tileset.clippingPlanes;
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model.clippingPlanesOriginMatrix = this._tileset.clippingPlanesOriginMatrix;
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if (defined(tilesetClippingPlanes) && this._tile.clippingPlanesDirty) {
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// Dereference the clipping planes from the model if they are irrelevant - saves on shading
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// Link/Dereference directly to avoid ownership checks.
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model._clippingPlanes = (tilesetClippingPlanes.enabled && this._tile._isClipped) ? tilesetClippingPlanes : undefined;
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}
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// If the model references a different ClippingPlaneCollection due to the tileset's collection being replaced with a
|
// ClippingPlaneCollection that gives this tile the same clipping status, update the model to use the new ClippingPlaneCollection.
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if (defined(tilesetClippingPlanes) && defined(model._clippingPlanes) && model._clippingPlanes !== tilesetClippingPlanes) {
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model._clippingPlanes = tilesetClippingPlanes;
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}
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}
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this._modelInstanceCollection.update(frameState);
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// If any commands were pushed, add derived commands
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var commandEnd = frameState.commandList.length;
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if ((commandStart < commandEnd) && (frameState.passes.render || frameState.passes.pick)) {
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this._batchTable.addDerivedCommands(frameState, commandStart, false);
|
}
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};
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Instanced3DModel3DTileContent.prototype.isDestroyed = function() {
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return false;
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};
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Instanced3DModel3DTileContent.prototype.destroy = function() {
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this._modelInstanceCollection = this._modelInstanceCollection && this._modelInstanceCollection.destroy();
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this._batchTable = this._batchTable && this._batchTable.destroy();
|
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return destroyObject(this);
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};
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export default Instanced3DModel3DTileContent;
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