/** * @author alteredq / http://alteredqualia.com/ */ /* ///OrthographicCamera方法根據 left, right, top, bottom, near, far 生成正交投影相機.OrthographicCamera對象的功能函數采取 /// 定義構造的函數原型對象來實現. */ ///<summary>OrthographicCamera</summary> ///<param name ="left" type="Number">指明相對垂直平面的左邊坐標位置</param> ///<param name ="right" type="Number">指明相對垂直平面的右邊坐標位置</param> ///<param name ="top" type="Number">指明相對垂直平面的頂部坐標位置</param> ///<param name ="bottom" type="Number">指明相對垂直平面的底部坐標位置</param> ///<param name ="near" type="Number">指明相對深度剪切面的近的距離，必須為正數,可選參數,如果未指定,初始化為0.1</param> ///<param name ="far" type="Number">指明相對深度剪切面的遠的距離，必須為正數,可選參數,如果未指定,初始化為2000</param> ///<returns type="OrthographicCamera">返回OrthographicCamera,正交投影相機.</returns> THREE.OrthographicCamera = function ( left, right, top, bottom, near, far ) { THREE.Camera.call( this ); //調用Camera對象的call方法,將本來屬于Camera的方法交給當前對象OrthographicCamera來使用. this.left = left; //指明相對垂直平面的相機的左邊坐標位置 this.right = right; //指明相對垂直平面的相機的右邊坐標位置 this.top = top; //指明相對垂直平面的相機的頂部坐標位置 this.bottom = bottom; //指明相對垂直平面的相機的底部坐標位置 this.near = ( near !== undefined ) ? near : 0.1; //指明相對深度剪切面的近的距離，必須為正數,可選參數,如果未指定,初始化為0.1 this.far = ( far !== undefined ) ? far : 2000; //指明相對深度剪切面的近的距離，必須為正數,可選參數,如果未指定,初始化為2000 this.updateProjectionMatrix(); //調用updateProjectionMatrix方法,更新相機的投影矩陣. }; /************************************************************************************** ****下面是OrthographicCamera對象提供的功能函數定義,1部份通過prototype繼承自Camera方法 ***************************************************************************************/ THREE.OrthographicCamera.prototype = Object.create( THREE.Camera.prototype ); /* ///updateProjectionMatrix方法返回正交投影相機的可視邊界的矩陣. */ ///<summary>updateProjectionMatrix</summary> ///<returns type="OrthographicCamera">返回新的OrthographicCamera對象</returns> THREE.OrthographicCamera.prototype.updateProjectionMatrix = function () { this.projectionMatrix.makeOrthographic( this.left, this.right, this.top, this.bottom, this.near, this.far ); //調用THREE.Matrix4.makeOrthographic生成正交矩陣 }; /*clone方法 ///clone方法克隆OrthographicCamera對象 */ ///<summary>clone</summary> ///<returns type="OrthographicCamera">返回克隆的OrthographicCamera對象</returns> THREE.OrthographicCamera.prototype.clone = function () { var camera = new THREE.OrthographicCamera(); THREE.Camera.prototype.clone.call( this, camera ); //調用THREE.Camera.Clone(camera)方法,克隆相機對象 camera.left = this.left; //將正交投影相機的 left 屬性值復制 camera.right = this.right; //將正交投影相機的 right 屬性值復制 camera.top = this.top; //將正交投影相機的 top 屬性值復制 camera.bottom = this.bottom; //將正交投影相機的 bottom 屬性值復制 camera.near = this.near; //將正交投影相機的 near 屬性值復制 camera.far = this.far; //將正交投影相機的 far 屬性值復制 return camera; //返回克隆的OrthographicCamera對象 };