mirror of
https://github.com/jiawanlong/Cesium-Examples.git
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369 lines
11 KiB
JavaScript
369 lines
11 KiB
JavaScript
/**
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* Builds one or many THREE.Mesh from one raw set of Arraybuffers, materialGroup descriptions and further parameters.
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* Supports vertex, vertexColor, normal, uv and index buffers.
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* @class
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*/
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THREE.LoaderSupport.MeshBuilder = (function () {
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var LOADER_MESH_BUILDER_VERSION = '1.2.0';
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var Validator = THREE.LoaderSupport.Validator;
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function MeshBuilder() {
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console.info( 'Using THREE.LoaderSupport.MeshBuilder version: ' + LOADER_MESH_BUILDER_VERSION );
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this.logging = {
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enabled: true,
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debug: false
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};
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this.callbacks = new THREE.LoaderSupport.Callbacks();
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this.materials = [];
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}
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/**
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* Enable or disable logging in general (except warn and error), plus enable or disable debug logging.
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* @memberOf THREE.LoaderSupport.MeshBuilder
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*
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* @param {boolean} enabled True or false.
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* @param {boolean} debug True or false.
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*/
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MeshBuilder.prototype.setLogging = function ( enabled, debug ) {
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this.logging.enabled = enabled === true;
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this.logging.debug = debug === true;
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};
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/**
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* Initializes the MeshBuilder (currently only default material initialisation).
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* @memberOf THREE.LoaderSupport.MeshBuilder
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*
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*/
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MeshBuilder.prototype.init = function () {
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var defaultMaterial = new THREE.MeshStandardMaterial( { color: 0xDCF1FF } );
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defaultMaterial.name = 'defaultMaterial';
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var defaultVertexColorMaterial = new THREE.MeshStandardMaterial( { color: 0xDCF1FF } );
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defaultVertexColorMaterial.name = 'defaultVertexColorMaterial';
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defaultVertexColorMaterial.vertexColors = THREE.VertexColors;
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var defaultLineMaterial = new THREE.LineBasicMaterial();
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defaultLineMaterial.name = 'defaultLineMaterial';
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var defaultPointMaterial = new THREE.PointsMaterial( { size: 1 } );
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defaultPointMaterial.name = 'defaultPointMaterial';
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var runtimeMaterials = {};
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runtimeMaterials[ defaultMaterial.name ] = defaultMaterial;
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runtimeMaterials[ defaultVertexColorMaterial.name ] = defaultVertexColorMaterial;
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runtimeMaterials[ defaultLineMaterial.name ] = defaultLineMaterial;
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runtimeMaterials[ defaultPointMaterial.name ] = defaultPointMaterial;
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this.updateMaterials(
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{
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cmd: 'materialData',
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materials: {
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materialCloneInstructions: null,
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serializedMaterials: null,
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runtimeMaterials: runtimeMaterials
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}
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}
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);
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};
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/**
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* Set materials loaded by any supplier of an Array of {@link THREE.Material}.
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* @memberOf THREE.LoaderSupport.MeshBuilder
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*
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* @param {THREE.Material[]} materials Array of {@link THREE.Material}
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*/
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MeshBuilder.prototype.setMaterials = function ( materials ) {
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var payload = {
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cmd: 'materialData',
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materials: {
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materialCloneInstructions: null,
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serializedMaterials: null,
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runtimeMaterials: Validator.isValid( this.callbacks.onLoadMaterials ) ? this.callbacks.onLoadMaterials( materials ) : materials
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}
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};
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this.updateMaterials( payload );
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};
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MeshBuilder.prototype._setCallbacks = function ( callbacks ) {
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if ( Validator.isValid( callbacks.onProgress ) ) this.callbacks.setCallbackOnProgress( callbacks.onProgress );
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if ( Validator.isValid( callbacks.onMeshAlter ) ) this.callbacks.setCallbackOnMeshAlter( callbacks.onMeshAlter );
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if ( Validator.isValid( callbacks.onLoad ) ) this.callbacks.setCallbackOnLoad( callbacks.onLoad );
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if ( Validator.isValid( callbacks.onLoadMaterials ) ) this.callbacks.setCallbackOnLoadMaterials( callbacks.onLoadMaterials );
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};
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/**
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* Delegates processing of the payload (mesh building or material update) to the corresponding functions (BW-compatibility).
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* @memberOf THREE.LoaderSupport.MeshBuilder
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*
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* @param {Object} payload Raw Mesh or Material descriptions.
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* @returns {THREE.Mesh[]} mesh Array of {@link THREE.Mesh} or null in case of material update
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*/
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MeshBuilder.prototype.processPayload = function ( payload ) {
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if ( payload.cmd === 'meshData' ) {
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return this.buildMeshes( payload );
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} else if ( payload.cmd === 'materialData' ) {
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this.updateMaterials( payload );
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return null;
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}
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};
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/**
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* Builds one or multiple meshes from the data described in the payload (buffers, params, material info).
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* @memberOf THREE.LoaderSupport.MeshBuilder
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*
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* @param {Object} meshPayload Raw mesh description (buffers, params, materials) used to build one to many meshes.
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* @returns {THREE.Mesh[]} mesh Array of {@link THREE.Mesh}
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*/
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MeshBuilder.prototype.buildMeshes = function ( meshPayload ) {
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var meshName = meshPayload.params.meshName;
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var bufferGeometry = new THREE.BufferGeometry();
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bufferGeometry.addAttribute( 'position', new THREE.BufferAttribute( new Float32Array( meshPayload.buffers.vertices ), 3 ) );
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if ( Validator.isValid( meshPayload.buffers.indices ) ) {
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bufferGeometry.setIndex( new THREE.BufferAttribute( new Uint32Array( meshPayload.buffers.indices ), 1 ));
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}
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var haveVertexColors = Validator.isValid( meshPayload.buffers.colors );
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if ( haveVertexColors ) {
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bufferGeometry.addAttribute( 'color', new THREE.BufferAttribute( new Float32Array( meshPayload.buffers.colors ), 3 ) );
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}
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if ( Validator.isValid( meshPayload.buffers.normals ) ) {
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bufferGeometry.addAttribute( 'normal', new THREE.BufferAttribute( new Float32Array( meshPayload.buffers.normals ), 3 ) );
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} else {
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bufferGeometry.computeVertexNormals();
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}
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if ( Validator.isValid( meshPayload.buffers.uvs ) ) {
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bufferGeometry.addAttribute( 'uv', new THREE.BufferAttribute( new Float32Array( meshPayload.buffers.uvs ), 2 ) );
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}
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var material, materialName, key;
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var materialNames = meshPayload.materials.materialNames;
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var createMultiMaterial = meshPayload.materials.multiMaterial;
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var multiMaterials = [];
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for ( key in materialNames ) {
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materialName = materialNames[ key ];
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material = this.materials[ materialName ];
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if ( createMultiMaterial ) multiMaterials.push( material );
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}
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if ( createMultiMaterial ) {
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material = multiMaterials;
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var materialGroups = meshPayload.materials.materialGroups;
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var materialGroup;
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for ( key in materialGroups ) {
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materialGroup = materialGroups[ key ];
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bufferGeometry.addGroup( materialGroup.start, materialGroup.count, materialGroup.index );
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}
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}
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var meshes = [];
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var mesh;
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var callbackOnMeshAlter = this.callbacks.onMeshAlter;
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var callbackOnMeshAlterResult;
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var useOrgMesh = true;
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var geometryType = Validator.verifyInput( meshPayload.geometryType, 0 );
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if ( Validator.isValid( callbackOnMeshAlter ) ) {
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callbackOnMeshAlterResult = callbackOnMeshAlter(
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{
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detail: {
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meshName: meshName,
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bufferGeometry: bufferGeometry,
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material: material,
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geometryType: geometryType
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}
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}
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);
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if ( Validator.isValid( callbackOnMeshAlterResult ) ) {
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if ( ! callbackOnMeshAlterResult.isDisregardMesh() && callbackOnMeshAlterResult.providesAlteredMeshes() ) {
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for ( var i in callbackOnMeshAlterResult.meshes ) {
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meshes.push( callbackOnMeshAlterResult.meshes[ i ] );
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}
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}
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useOrgMesh = false;
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}
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}
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if ( useOrgMesh ) {
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if ( meshPayload.computeBoundingSphere ) bufferGeometry.computeBoundingSphere();
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if ( geometryType === 0 ) {
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mesh = new THREE.Mesh( bufferGeometry, material );
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} else if ( geometryType === 1) {
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mesh = new THREE.LineSegments( bufferGeometry, material );
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} else {
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mesh = new THREE.Points( bufferGeometry, material );
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}
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mesh.name = meshName;
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meshes.push( mesh );
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}
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var progressMessage;
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if ( Validator.isValid( meshes ) && meshes.length > 0 ) {
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var meshNames = [];
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for ( var i in meshes ) {
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mesh = meshes[ i ];
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meshNames[ i ] = mesh.name;
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}
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progressMessage = 'Adding mesh(es) (' + meshNames.length + ': ' + meshNames + ') from input mesh: ' + meshName;
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progressMessage += ' (' + ( meshPayload.progress.numericalValue * 100 ).toFixed( 2 ) + '%)';
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} else {
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progressMessage = 'Not adding mesh: ' + meshName;
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progressMessage += ' (' + ( meshPayload.progress.numericalValue * 100 ).toFixed( 2 ) + '%)';
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}
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var callbackOnProgress = this.callbacks.onProgress;
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if ( Validator.isValid( callbackOnProgress ) ) {
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var event = new CustomEvent( 'MeshBuilderEvent', {
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detail: {
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type: 'progress',
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modelName: meshPayload.params.meshName,
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text: progressMessage,
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numericalValue: meshPayload.progress.numericalValue
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}
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} );
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callbackOnProgress( event );
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}
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return meshes;
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};
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/**
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* Updates the materials with contained material objects (sync) or from alteration instructions (async).
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* @memberOf THREE.LoaderSupport.MeshBuilder
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*
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* @param {Object} materialPayload Material update instructions
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*/
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MeshBuilder.prototype.updateMaterials = function ( materialPayload ) {
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var material, materialName;
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var materialCloneInstructions = materialPayload.materials.materialCloneInstructions;
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if ( Validator.isValid( materialCloneInstructions ) ) {
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var materialNameOrg = materialCloneInstructions.materialNameOrg;
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var materialOrg = this.materials[ materialNameOrg ];
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if ( Validator.isValid( materialNameOrg ) ) {
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material = materialOrg.clone();
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materialName = materialCloneInstructions.materialName;
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material.name = materialName;
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var materialProperties = materialCloneInstructions.materialProperties;
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for ( var key in materialProperties ) {
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if ( material.hasOwnProperty( key ) && materialProperties.hasOwnProperty( key ) ) material[ key ] = materialProperties[ key ];
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}
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this.materials[ materialName ] = material;
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} else {
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console.warn( 'Requested material "' + materialNameOrg + '" is not available!' );
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}
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}
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var materials = materialPayload.materials.serializedMaterials;
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if ( Validator.isValid( materials ) && Object.keys( materials ).length > 0 ) {
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var loader = new THREE.MaterialLoader();
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var materialJson;
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for ( materialName in materials ) {
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materialJson = materials[ materialName ];
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if ( Validator.isValid( materialJson ) ) {
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material = loader.parse( materialJson );
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if ( this.logging.enabled ) console.info( 'De-serialized material with name "' + materialName + '" will be added.' );
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this.materials[ materialName ] = material;
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}
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}
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}
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materials = materialPayload.materials.runtimeMaterials;
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if ( Validator.isValid( materials ) && Object.keys( materials ).length > 0 ) {
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for ( materialName in materials ) {
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material = materials[ materialName ];
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if ( this.logging.enabled ) console.info( 'Material with name "' + materialName + '" will be added.' );
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this.materials[ materialName ] = material;
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}
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}
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};
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/**
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* Returns the mapping object of material name and corresponding jsonified material.
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*
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* @returns {Object} Map of Materials in JSON representation
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*/
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MeshBuilder.prototype.getMaterialsJSON = function () {
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var materialsJSON = {};
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var material;
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for ( var materialName in this.materials ) {
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material = this.materials[ materialName ];
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materialsJSON[ materialName ] = material.toJSON();
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}
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return materialsJSON;
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};
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/**
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* Returns the mapping object of material name and corresponding material.
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*
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* @returns {Object} Map of {@link THREE.Material}
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*/
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MeshBuilder.prototype.getMaterials = function () {
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return this.materials;
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};
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return MeshBuilder;
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})();
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