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SceneLoader.js
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SceneLoader.js
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/**
* @author alteredq / http://alteredqualia.com/
*/
THREE.SceneLoader = function ( manager ) {
this.onLoadStart = function () {};
this.onLoadProgress = function() {};
this.onLoadComplete = function () {};
this.callbackSync = function () {};
this.callbackProgress = function () {};
this.geometryHandlers = {};
this.hierarchyHandlers = {};
this.addGeometryHandler( "ascii", THREE.JSONLoader );
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
};
THREE.SceneLoader.prototype = {
constructor: THREE.SceneLoader,
load: function ( url, onLoad, onProgress, onError ) {
var scope = this;
var loader = new THREE.XHRLoader( scope.manager );
loader.setCrossOrigin( this.crossOrigin );
loader.load( url, function ( text ) {
scope.parse( JSON.parse( text ), onLoad, url );
}, onProgress, onError );
},
setCrossOrigin: function ( value ) {
this.crossOrigin = value;
},
addGeometryHandler: function ( typeID, loaderClass ) {
this.geometryHandlers[ typeID ] = { "loaderClass": loaderClass };
},
addHierarchyHandler: function ( typeID, loaderClass ) {
this.hierarchyHandlers[ typeID ] = { "loaderClass": loaderClass };
},
parse: function ( json, callbackFinished, url ) {
var scope = this;
var urlBase = THREE.Loader.prototype.extractUrlBase( url );
var geometry, material, camera, fog,
texture, images, color,
light, hex, intensity,
counter_models, counter_textures,
total_models, total_textures,
result;
var target_array = [];
var data = json;
// async geometry loaders
for ( var typeID in this.geometryHandlers ) {
var loaderClass = this.geometryHandlers[ typeID ][ "loaderClass" ];
this.geometryHandlers[ typeID ][ "loaderObject" ] = new loaderClass();
}
// async hierachy loaders
for ( var typeID in this.hierarchyHandlers ) {
var loaderClass = this.hierarchyHandlers[ typeID ][ "loaderClass" ];
this.hierarchyHandlers[ typeID ][ "loaderObject" ] = new loaderClass();
}
counter_models = 0;
counter_textures = 0;
result = {
scene: new THREE.Scene(),
geometries: {},
face_materials: {},
materials: {},
textures: {},
objects: {},
cameras: {},
lights: {},
fogs: {},
empties: {},
groups: {}
};
if ( data.transform ) {
var position = data.transform.position,
rotation = data.transform.rotation,
scale = data.transform.scale;
if ( position ) {
result.scene.position.fromArray( position );
}
if ( rotation ) {
result.scene.rotation.fromArray( rotation );
}
if ( scale ) {
result.scene.scale.fromArray( scale );
}
if ( position || rotation || scale ) {
result.scene.updateMatrix();
result.scene.updateMatrixWorld();
}
}
function get_url( source_url, url_type ) {
if ( url_type == "relativeToHTML" ) {
return source_url;
} else {
return urlBase + source_url;
}
};
// toplevel loader function, delegates to handle_children
function handle_objects() {
handle_children( result.scene, data.objects );
}
// handle all the children from the loaded json and attach them to given parent
function handle_children( parent, children ) {
var mat, dst, pos, rot, scl, quat;
for ( var objID in children ) {
// check by id if child has already been handled,
// if not, create new object
var object = result.objects[ objID ];
var objJSON = children[ objID ];
if ( object === undefined ) {
// meshes
if ( objJSON.type && ( objJSON.type in scope.hierarchyHandlers ) ) {
if ( objJSON.loading === undefined ) {
var reservedTypes = {
"type": 1, "url": 1, "material": 1,
"position": 1, "rotation": 1, "scale" : 1,
"visible": 1, "children": 1, "userData": 1,
"skin": 1, "morph": 1, "mirroredLoop": 1, "duration": 1
};
var loaderParameters = {};
for ( var parType in objJSON ) {
if ( ! ( parType in reservedTypes ) ) {
loaderParameters[ parType ] = objJSON[ parType ];
}
}
material = result.materials[ objJSON.material ];
objJSON.loading = true;
var loader = scope.hierarchyHandlers[ objJSON.type ][ "loaderObject" ];
// ColladaLoader
if ( loader.options ) {
loader.load( get_url( objJSON.url, data.urlBaseType ), create_callback_hierachy( objID, parent, material, objJSON ) );
// UTF8Loader
// OBJLoader
} else {
loader.load( get_url( objJSON.url, data.urlBaseType ), create_callback_hierachy( objID, parent, material, objJSON ), loaderParameters );
}
}
} else if ( objJSON.geometry !== undefined ) {
geometry = result.geometries[ objJSON.geometry ];
// geometry already loaded
if ( geometry ) {
var needsTangents = false;
material = result.materials[ objJSON.material ];
needsTangents = material instanceof THREE.ShaderMaterial;
pos = objJSON.position;
rot = objJSON.rotation;
scl = objJSON.scale;
mat = objJSON.matrix;
quat = objJSON.quaternion;
// use materials from the model file
// if there is no material specified in the object
if ( ! objJSON.material ) {
material = new THREE.MeshFaceMaterial( result.face_materials[ objJSON.geometry ] );
}
// use materials from the model file
// if there is just empty face material
// (must create new material as each model has its own face material)
if ( ( material instanceof THREE.MeshFaceMaterial ) && material.materials.length === 0 ) {
material = new THREE.MeshFaceMaterial( result.face_materials[ objJSON.geometry ] );
}
if ( material instanceof THREE.MeshFaceMaterial ) {
for ( var i = 0; i < material.materials.length; i ++ ) {
needsTangents = needsTangents || ( material.materials[ i ] instanceof THREE.ShaderMaterial );
}
}
if ( needsTangents ) {
geometry.computeTangents();
}
if ( objJSON.skin ) {
object = new THREE.SkinnedMesh( geometry, material );
} else if ( objJSON.morph ) {
object = new THREE.MorphAnimMesh( geometry, material );
if ( objJSON.duration !== undefined ) {
object.duration = objJSON.duration;
}
if ( objJSON.time !== undefined ) {
object.time = objJSON.time;
}
if ( objJSON.mirroredLoop !== undefined ) {
object.mirroredLoop = objJSON.mirroredLoop;
}
if ( material.morphNormals ) {
geometry.computeMorphNormals();
}
} else {
object = new THREE.Mesh( geometry, material );
}
object.name = objID;
if ( mat ) {
object.matrixAutoUpdate = false;
object.matrix.set(
mat[0], mat[1], mat[2], mat[3],
mat[4], mat[5], mat[6], mat[7],
mat[8], mat[9], mat[10], mat[11],
mat[12], mat[13], mat[14], mat[15]
);
} else {
object.position.fromArray( pos );
if ( quat ) {
object.quaternion.fromArray( quat );
} else {
object.rotation.fromArray( rot );
}
object.scale.fromArray( scl );
}
object.visible = objJSON.visible;
object.castShadow = objJSON.castShadow;
object.receiveShadow = objJSON.receiveShadow;
parent.add( object );
result.objects[ objID ] = object;
}
// lights
} else if ( objJSON.type === "AmbientLight" || objJSON.type === "PointLight" ||
objJSON.type === "DirectionalLight" || objJSON.type === "SpotLight" ||
objJSON.type === "HemisphereLight" || objJSON.type === "AreaLight" ) {
var color = objJSON.color;
var intensity = objJSON.intensity;
var distance = objJSON.distance;
var position = objJSON.position;
var rotation = objJSON.rotation;
switch ( objJSON.type ) {
case 'AmbientLight':
light = new THREE.AmbientLight( color );
break;
case 'PointLight':
light = new THREE.PointLight( color, intensity, distance );
light.position.fromArray( position );
break;
case 'DirectionalLight':
light = new THREE.DirectionalLight( color, intensity );
light.position.fromArray( objJSON.direction );
break;
case 'SpotLight':
light = new THREE.SpotLight( color, intensity, distance, 1 );
light.angle = objJSON.angle;
light.position.fromArray( position );
light.target.set( position[ 0 ], position[ 1 ] - distance, position[ 2 ] );
light.target.applyEuler( new THREE.Euler( rotation[ 0 ], rotation[ 1 ], rotation[ 2 ], 'XYZ' ) );
break;
case 'HemisphereLight':
light = new THREE.DirectionalLight( color, intensity, distance );
light.target.set( position[ 0 ], position[ 1 ] - distance, position[ 2 ] );
light.target.applyEuler( new THREE.Euler( rotation[ 0 ], rotation[ 1 ], rotation[ 2 ], 'XYZ' ) );
break;
case 'AreaLight':
light = new THREE.AreaLight(color, intensity);
light.position.fromArray( position );
light.width = objJSON.size;
light.height = objJSON.size_y;
break;
}
parent.add( light );
light.name = objID;
result.lights[ objID ] = light;
result.objects[ objID ] = light;
// cameras
} else if ( objJSON.type === "PerspectiveCamera" || objJSON.type === "OrthographicCamera" ) {
pos = objJSON.position;
rot = objJSON.rotation;
quat = objJSON.quaternion;
if ( objJSON.type === "PerspectiveCamera" ) {
camera = new THREE.PerspectiveCamera( objJSON.fov, objJSON.aspect, objJSON.near, objJSON.far );
} else if ( objJSON.type === "OrthographicCamera" ) {
camera = new THREE.OrthographicCamera( objJSON.left, objJSON.right, objJSON.top, objJSON.bottom, objJSON.near, objJSON.far );
}
camera.name = objID;
camera.position.fromArray( pos );
if ( quat !== undefined ) {
camera.quaternion.fromArray( quat );
} else if ( rot !== undefined ) {
camera.rotation.fromArray( rot );
} else if ( objJSON.target ) {
camera.lookAt( new THREE.Vector3().fromArray( objJSON.target ) );
}
parent.add( camera );
result.cameras[ objID ] = camera;
result.objects[ objID ] = camera;
// pure Object3D
} else {
pos = objJSON.position;
rot = objJSON.rotation;
scl = objJSON.scale;
quat = objJSON.quaternion;
object = new THREE.Object3D();
object.name = objID;
object.position.fromArray( pos );
if ( quat ) {
object.quaternion.fromArray( quat );
} else {
object.rotation.fromArray( rot );
}
object.scale.fromArray( scl );
object.visible = ( objJSON.visible !== undefined ) ? objJSON.visible : false;
parent.add( object );
result.objects[ objID ] = object;
result.empties[ objID ] = object;
}
if ( object ) {
if ( objJSON.userData !== undefined ) {
for ( var key in objJSON.userData ) {
var value = objJSON.userData[ key ];
object.userData[ key ] = value;
}
}
if ( objJSON.groups !== undefined ) {
for ( var i = 0; i < objJSON.groups.length; i ++ ) {
var groupID = objJSON.groups[ i ];
if ( result.groups[ groupID ] === undefined ) {
result.groups[ groupID ] = [];
}
result.groups[ groupID ].push( objID );
}
}
}
}
if ( object !== undefined && objJSON.children !== undefined ) {
handle_children( object, objJSON.children );
}
}
};
function handle_mesh( geo, mat, id ) {
result.geometries[ id ] = geo;
result.face_materials[ id ] = mat;
handle_objects();
};
function handle_hierarchy( node, id, parent, material, obj ) {
var p = obj.position;
var r = obj.rotation;
var q = obj.quaternion;
var s = obj.scale;
node.position.fromArray( p );
if ( q ) {
node.quaternion.fromArray( q );
} else {
node.rotation.fromArray( r );
}
node.scale.fromArray( s );
// override children materials
// if object material was specified in JSON explicitly
if ( material ) {
node.traverse( function ( child ) {
child.material = material;
} );
}
// override children visibility
// with root node visibility as specified in JSON
var visible = ( obj.visible !== undefined ) ? obj.visible : true;
node.traverse( function ( child ) {
child.visible = visible;
} );
parent.add( node );
node.name = id;
result.objects[ id ] = node;
handle_objects();
};
function create_callback_geometry( id ) {
return function ( geo, mat ) {
geo.name = id;
handle_mesh( geo, mat, id );
counter_models -= 1;
scope.onLoadComplete();
async_callback_gate();
}
};
function create_callback_hierachy( id, parent, material, obj ) {
return function ( event ) {
var result;
// loaders which use EventDispatcher
if ( event.content ) {
result = event.content;
// ColladaLoader
} else if ( event.dae ) {
result = event.scene;
// UTF8Loader
} else {
result = event;
}
handle_hierarchy( result, id, parent, material, obj );
counter_models -= 1;
scope.onLoadComplete();
async_callback_gate();
}
};
function create_callback_embed( id ) {
return function ( geo, mat ) {
geo.name = id;
result.geometries[ id ] = geo;
result.face_materials[ id ] = mat;
}
};
function async_callback_gate() {
var progress = {
totalModels : total_models,
totalTextures : total_textures,
loadedModels : total_models - counter_models,
loadedTextures : total_textures - counter_textures
};
scope.callbackProgress( progress, result );
scope.onLoadProgress();
if ( counter_models === 0 && counter_textures === 0 ) {
finalize();
callbackFinished( result );
}
};
function finalize() {
// take care of targets which could be asynchronously loaded objects
for ( var i = 0; i < target_array.length; i ++ ) {
var ta = target_array[ i ];
var target = result.objects[ ta.targetName ];
if ( target ) {
ta.object.target = target;
} else {
// if there was error and target of specified name doesn't exist in the scene file
// create instead dummy target
// (target must be added to scene explicitly as parent is already added)
ta.object.target = new THREE.Object3D();
result.scene.add( ta.object.target );
}
ta.object.target.userData.targetInverse = ta.object;
}
};
var callbackTexture = function ( count ) {
counter_textures -= count;
async_callback_gate();
scope.onLoadComplete();
};
// must use this instead of just directly calling callbackTexture
// because of closure in the calling context loop
var generateTextureCallback = function ( count ) {
return function () {
callbackTexture( count );
};
};
function traverse_json_hierarchy( objJSON, callback ) {
callback( objJSON );
if ( objJSON.children !== undefined ) {
for ( var objChildID in objJSON.children ) {
traverse_json_hierarchy( objJSON.children[ objChildID ], callback );
}
}
};
// first go synchronous elements
// fogs
var fogID, fogJSON;
for ( fogID in data.fogs ) {
fogJSON = data.fogs[ fogID ];
if ( fogJSON.type === "linear" ) {
fog = new THREE.Fog( 0x000000, fogJSON.near, fogJSON.far );
} else if ( fogJSON.type === "exp2" ) {
fog = new THREE.FogExp2( 0x000000, fogJSON.density );
}
color = fogJSON.color;
fog.color.setRGB( color[0], color[1], color[2] );
result.fogs[ fogID ] = fog;
}
// now come potentially asynchronous elements
// geometries
// count how many geometries will be loaded asynchronously
var geoID, geoJSON;
for ( geoID in data.geometries ) {
geoJSON = data.geometries[ geoID ];
if ( geoJSON.type in this.geometryHandlers ) {
counter_models += 1;
scope.onLoadStart();
}
}
// count how many hierarchies will be loaded asynchronously
for ( var objID in data.objects ) {
traverse_json_hierarchy( data.objects[ objID ], function ( objJSON ) {
if ( objJSON.type && ( objJSON.type in scope.hierarchyHandlers ) ) {
counter_models += 1;
scope.onLoadStart();
}
});
}
total_models = counter_models;
for ( geoID in data.geometries ) {
geoJSON = data.geometries[ geoID ];
if ( geoJSON.type === "cube" ) {
geometry = new THREE.BoxGeometry( geoJSON.width, geoJSON.height, geoJSON.depth, geoJSON.widthSegments, geoJSON.heightSegments, geoJSON.depthSegments );
geometry.name = geoID;
result.geometries[ geoID ] = geometry;
} else if ( geoJSON.type === "plane" ) {
geometry = new THREE.PlaneGeometry( geoJSON.width, geoJSON.height, geoJSON.widthSegments, geoJSON.heightSegments );
geometry.name = geoID;
result.geometries[ geoID ] = geometry;
} else if ( geoJSON.type === "sphere" ) {
geometry = new THREE.SphereGeometry( geoJSON.radius, geoJSON.widthSegments, geoJSON.heightSegments );
geometry.name = geoID;
result.geometries[ geoID ] = geometry;
} else if ( geoJSON.type === "cylinder" ) {
geometry = new THREE.CylinderGeometry( geoJSON.topRad, geoJSON.botRad, geoJSON.height, geoJSON.radSegs, geoJSON.heightSegs );
geometry.name = geoID;
result.geometries[ geoID ] = geometry;
} else if ( geoJSON.type === "torus" ) {
geometry = new THREE.TorusGeometry( geoJSON.radius, geoJSON.tube, geoJSON.segmentsR, geoJSON.segmentsT );
geometry.name = geoID;
result.geometries[ geoID ] = geometry;
} else if ( geoJSON.type === "icosahedron" ) {
geometry = new THREE.IcosahedronGeometry( geoJSON.radius, geoJSON.subdivisions );
geometry.name = geoID;
result.geometries[ geoID ] = geometry;
} else if ( geoJSON.type in this.geometryHandlers ) {
var loaderParameters = {};
for ( var parType in geoJSON ) {
if ( parType !== "type" && parType !== "url" ) {
loaderParameters[ parType ] = geoJSON[ parType ];
}
}
var loader = this.geometryHandlers[ geoJSON.type ][ "loaderObject" ];
loader.load( get_url( geoJSON.url, data.urlBaseType ), create_callback_geometry( geoID ), loaderParameters );
} else if ( geoJSON.type === "embedded" ) {
var modelJson = data.embeds[ geoJSON.id ],
texture_path = "";
// pass metadata along to jsonLoader so it knows the format version
modelJson.metadata = data.metadata;
if ( modelJson ) {
var jsonLoader = this.geometryHandlers[ "ascii" ][ "loaderObject" ];
var model = jsonLoader.parse( modelJson, texture_path );
create_callback_embed( geoID )( model.geometry, model.materials );
}
}
}
// textures
// count how many textures will be loaded asynchronously
var textureID, textureJSON;
for ( textureID in data.textures ) {
textureJSON = data.textures[ textureID ];
if ( textureJSON.url instanceof Array ) {
counter_textures += textureJSON.url.length;
for( var n = 0; n < textureJSON.url.length; n ++ ) {
scope.onLoadStart();
}
} else {
counter_textures += 1;
scope.onLoadStart();
}
}
total_textures = counter_textures;
for ( textureID in data.textures ) {
textureJSON = data.textures[ textureID ];
if ( textureJSON.mapping !== undefined && THREE[ textureJSON.mapping ] !== undefined ) {
textureJSON.mapping = new THREE[ textureJSON.mapping ]();
}
var texture;
if ( textureJSON.url instanceof Array ) {
var count = textureJSON.url.length;
var url_array = [];
for ( var i = 0; i < count; i ++ ) {
url_array[ i ] = get_url( textureJSON.url[ i ], data.urlBaseType );
}
var loader = THREE.Loader.Handlers.get( url_array[ 0 ] );
if ( loader !== null ) {
texture = loader.load( url_array, generateTextureCallback( count ) );
texture.mapping = textureJSON.mapping;
} else {
texture = THREE.ImageUtils.loadTextureCube( url_array, textureJSON.mapping, generateTextureCallback( count ) );
}
} else {
var fullUrl = get_url( textureJSON.url, data.urlBaseType );
var textureCallback = generateTextureCallback( 1 );
var loader = THREE.Loader.Handlers.get( fullUrl );
if ( loader !== null ) {
texture = loader.load( fullUrl, textureCallback );
} else {
texture = new THREE.Texture();
loader = new THREE.ImageLoader();
( function ( texture ) {
loader.load( fullUrl, function ( image ) {
texture.image = image;
texture.needsUpdate = true;