Doodle3D-Slicer/three.js-master/examples/js/loaders/ctm/CTMLoader.js
2015-06-12 15:58:26 +02:00

260 lines
5.1 KiB
JavaScript
Executable File

/**
* Loader for CTM encoded models generated by OpenCTM tools:
* http://openctm.sourceforge.net/
*
* Uses js-openctm library by Juan Mellado
* http://code.google.com/p/js-openctm/
*
* @author alteredq / http://alteredqualia.com/
*/
THREE.CTMLoader = function ( showStatus ) {
THREE.Loader.call( this, showStatus );
};
THREE.CTMLoader.prototype = Object.create( THREE.Loader.prototype );
THREE.CTMLoader.prototype.constructor = THREE.CTMLoader;
// Load multiple CTM parts defined in JSON
THREE.CTMLoader.prototype.loadParts = function( url, callback, parameters ) {
parameters = parameters || {};
var scope = this;
var xhr = new XMLHttpRequest();
var basePath = parameters.basePath ? parameters.basePath : this.extractUrlBase( url );
xhr.onreadystatechange = function() {
if ( xhr.readyState === 4 ) {
if ( xhr.status === 200 || xhr.status === 0 ) {
var jsonObject = JSON.parse( xhr.responseText );
var materials = [], geometries = [], counter = 0;
function callbackFinal( geometry ) {
counter += 1;
geometries.push( geometry );
if ( counter === jsonObject.offsets.length ) {
callback( geometries, materials );
}
}
// init materials
for ( var i = 0; i < jsonObject.materials.length; i ++ ) {
materials[ i ] = scope.createMaterial( jsonObject.materials[ i ], basePath );
}
// load joined CTM file
var partUrl = basePath + jsonObject.data;
var parametersPart = { useWorker: parameters.useWorker, offsets: jsonObject.offsets };
scope.load( partUrl, callbackFinal, parametersPart );
}
}
}
xhr.open( "GET", url, true );
xhr.setRequestHeader( "Content-Type", "text/plain" );
xhr.send( null );
};
// Load CTMLoader compressed models
// - parameters
// - url (required)
// - callback (required)
THREE.CTMLoader.prototype.load = function( url, callback, parameters ) {
parameters = parameters || {};
var scope = this;
var offsets = parameters.offsets !== undefined ? parameters.offsets : [ 0 ];
var xhr = new XMLHttpRequest(),
callbackProgress = null;
var length = 0;
xhr.onreadystatechange = function() {
if ( xhr.readyState === 4 ) {
if ( xhr.status === 200 || xhr.status === 0 ) {
var binaryData = new Uint8Array(xhr.response);
var s = Date.now();
if ( parameters.useWorker ) {
var worker = parameters.worker || new Worker( "js/loaders/ctm/CTMWorker.js" );
worker.onmessage = function( event ) {
var files = event.data;
for ( var i = 0; i < files.length; i ++ ) {
var ctmFile = files[ i ];
var e1 = Date.now();
// console.log( "CTM data parse time [worker]: " + (e1-s) + " ms" );
scope.createModel( ctmFile, callback );
var e = Date.now();
console.log( "model load time [worker]: " + (e - e1) + " ms, total: " + (e - s));
}
};
worker.postMessage( { "data": binaryData, "offsets": offsets } );
} else {
for ( var i = 0; i < offsets.length; i ++ ) {
var stream = new CTM.Stream( binaryData );
stream.offset = offsets[ i ];
var ctmFile = new CTM.File( stream );
scope.createModel( ctmFile, callback );
}
//var e = Date.now();
//console.log( "CTM data parse time [inline]: " + (e-s) + " ms" );
}
} else {
console.error( "Couldn't load [" + url + "] [" + xhr.status + "]" );
}
} else if ( xhr.readyState === 3 ) {
if ( callbackProgress ) {
if ( length === 0 ) {
length = xhr.getResponseHeader( "Content-Length" );
}
callbackProgress( { total: length, loaded: xhr.responseText.length } );
}
} else if ( xhr.readyState === 2 ) {
length = xhr.getResponseHeader( "Content-Length" );
}
}
xhr.open( "GET", url, true );
xhr.responseType = "arraybuffer";
xhr.send( null );
};
THREE.CTMLoader.prototype.createModel = function ( file, callback ) {
var Model = function () {
THREE.BufferGeometry.call( this );
this.materials = [];
var indices = file.body.indices,
positions = file.body.vertices,
normals = file.body.normals;
var uvs, colors;
var uvMaps = file.body.uvMaps;
if ( uvMaps !== undefined && uvMaps.length > 0 ) {
uvs = uvMaps[ 0 ].uv;
}
var attrMaps = file.body.attrMaps;
if ( attrMaps !== undefined && attrMaps.length > 0 && attrMaps[ 0 ].name === 'Color' ) {
colors = attrMaps[ 0 ].attr;
}
this.addAttribute( 'index', new THREE.BufferAttribute( indices, 1 ) );
this.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
if ( normals !== undefined ) {
this.addAttribute( 'normal', new THREE.BufferAttribute( normals, 3 ) );
}
if ( uvs !== undefined ) {
this.addAttribute( 'uv', new THREE.BufferAttribute( uvs, 2 ) );
}
if ( colors !== undefined ) {
this.addAttribute( 'color', new THREE.BufferAttribute( colors, 4 ) );
}
}
Model.prototype = Object.create( THREE.BufferGeometry.prototype );
Model.prototype.constructor = Model;
var geometry = new Model();
geometry.computeOffsets();
// compute vertex normals if not present in the CTM model
if ( geometry.attributes.normal === undefined ) {
geometry.computeVertexNormals();
}
callback( geometry );
};