发布于 2017-01-01 09:54:08 | 236 次阅读 | 评论: 0 | 来源: 网友投递
Three.js JS3D 引擎库
three.js是JavaScript编写的WebGL第 三方库。提供了非常多的3D显示功能。Three.js 是一款运行在浏览器中的 3D 引擎，你可以用它创建各种三维场景，包括了摄影机、光影、材质等各种对象。
THREE.Object3D = function () {
THREE.Object3DLibrary.push( this );
this.id = THREE.Object3DIdCount ++;
this.name = '';
this.properties = {};
this.parent = undefined;
this.children = [];
this.up = new THREE.Vector3( 0, 1, 0 );
this.position = new THREE.Vector3();
this.rotation = new THREE.Vector3();
this.eulerOrder = THREE.Object3D.defaultEulerOrder;
this.scale = new THREE.Vector3( 1, 1, 1 );
this.renderDepth = null;
this.rotationAutoUpdate = true;
this.matrix = new THREE.Matrix4();
this.matrixWorld = new THREE.Matrix4();
this.matrixRotationWorld = new THREE.Matrix4();
this.matrixAutoUpdate = true;
this.matrixWorldNeedsUpdate = true;
this.quaternion = new THREE.Quaternion();
this.useQuaternion = false;
this.boundRadius = 0.0;
this.boundRadiusScale = 1.0;
this.visible = true;
this.castShadow = false;
this.receiveShadow = false;
this.frustumCulled = true;
this._vector = new THREE.Vector3();
};
applyMatrix: function ( matrix ) {
this.matrix.multiply( matrix, this.matrix );
this.scale.getScaleFromMatrix( this.matrix );
var mat = new THREE.Matrix4().extractRotation( this.matrix );
this.rotation.setEulerFromRotationMatrix( mat, this.eulerOrder );
this.position.getPositionFromMatrix( this.matrix );
},
translate: function ( distance, axis ) {
this.matrix.rotateAxis( axis );
this.position.addSelf( axis.multiplyScalar( distance ) );
},
translateX: function ( distance ) {
this.translate( distance, this._vector.set( 1, 0, 0 ) );
},
traverse: function ( callback ) {
callback( this );
for ( var i = 0, l = this.children.length; i < l; i ++ ) {
this.children[ i ].traverse( callback );
}
},
updateMatrix: function () {
this.matrix.setPosition( this.position );
if ( this.useQuaternion === false ) {
this.matrix.setRotationFromEuler( this.rotation, this.eulerOrder );
} else {
this.matrix.setRotationFromQuaternion( this.quaternion );
}
if ( this.scale.x !== 1 || this.scale.y !== 1 || this.scale.z !== 1 ) {
this.matrix.scale( this.scale );
this.boundRadiusScale = Math.max( this.scale.x, Math.max( this.scale.y, this.scale.z ) );
}
this.matrixWorldNeedsUpdate = true;
},
updateMatrixWorld: function ( force ) {
if ( this.matrixAutoUpdate === true ) this.updateMatrix();
if ( this.matrixWorldNeedsUpdate === true || force === true ) {
if ( this.parent === undefined ) {
this.matrixWorld.copy( this.matrix );
} else {
this.matrixWorld.multiply( this.parent.matrixWorld, this.matrix );
}
this.matrixWorldNeedsUpdate = false;
force = true;
}
for ( var i = 0, l = this.children.length; i < l; i ++ ) {
this.children[ i ].updateMatrixWorld( force );
}
},
THREE.UV = function ( u, v ) {
this.u = u || 0;
this.v = v || 0;
};
THREE.Geometry = function () {
THREE.GeometryLibrary.push( this );
this.id = THREE.GeometryIdCount ++;
this.name = '';
this.vertices = [];
this.colors = [];
this.normals = [];
this.faces = [];
this.faceUvs = [[]];
this.faceVertexUvs = [[]];
this.morphTargets = [];
this.morphColors = [];
this.morphNormals = [];
this.skinWeights = [];
this.skinIndices = [];
this.lineDistances = [];
this.boundingBox = null;
this.boundingSphere = null;
this.hasTangents = false;
this.dynamic = true;
this.verticesNeedUpdate = false;
this.elementsNeedUpdate = false;
this.uvsNeedUpdate = false;
this.normalsNeedUpdate = false;
this.tangentsNeedUpdate = false;
this.colorsNeedUpdate = false;
this.lineDistancesNeedUpdate = false;
this.buffersNeedUpdate = false;
};
applyMatrix: function ( matrix ) {
var normalMatrix = new THREE.Matrix3();
normalMatrix.getInverse( matrix ).transpose();
for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {
var vertex = this.vertices[ i ];
matrix.multiplyVector3( vertex );
}
for ( var i = 0, il = this.faces.length; i < il; i ++ ) {
var face = this.faces[ i ];
normalMatrix.multiplyVector3( face.normal ).normalize();
for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {
normalMatrix.multiplyVector3( face.vertexNormals[ j ] ).normalize();
}
matrix.multiplyVector3( face.centroid );
}
},
THREE.Quaternion = function( x, y, z, w ) {
this.x = x || 0;
this.y = y || 0;
this.z = z || 0;
this.w = ( w !== undefined ) ? w : 1;
};