|  |  | 
 |  |  |       this.direction = new THREE.Vector3(); | 
 |  |  |       this.raycaster = null; | 
 |  |  |       this.prevTime = performance.now();//上一次render的时间 | 
 |  |  |       this.backgroundType = true; | 
 |  |  |  | 
 |  |  |       this.start = function () { | 
 |  |  |          this.initMain(); | 
 |  |  | 
 |  |  |       } | 
 |  |  |       this.initStats = function () { | 
 |  |  |          this.stats = new Stats(); | 
 |  |  |          // this.dom.appendChild( this.stats.dom ); | 
 |  |  |          this.dom.appendChild( this.stats.dom ); | 
 |  |  |          this.stats.domElement.style.display = 'none'; | 
 |  |  |       } | 
 |  |  |       this.initBackground = function () { | 
 |  |  |          // const cubeTextureLoader = new THREE.CubeTextureLoader(); | 
 |  |  |          // cubeTextureLoader.setPath( '../static/img/skybox/' ); | 
 |  |  |          // this.scene.background = cubeTextureLoader.load([ | 
 |  |  |          //    "px.jpg", "nx.jpg", | 
 |  |  |          //    "py.jpg", "ny.jpg", | 
 |  |  |          //    "pz.jpg", "nz.jpg" | 
 |  |  |          // ]); | 
 |  |  |          this.scene.background = new THREE.Color( 0xf0f0f0 ); | 
 |  |  |  | 
 |  |  |          if (this.backgroundType) { | 
 |  |  |             this.scene.background = new THREE.Color( 0xf0f0f0 ); | 
 |  |  |          } else { | 
 |  |  |             const cubeTextureLoader = new THREE.CubeTextureLoader(); | 
 |  |  |             cubeTextureLoader.setPath( '../static/img/skybox/' ); | 
 |  |  |             this.scene.background = cubeTextureLoader.load([ | 
 |  |  |                "px.jpg", "nx.jpg", | 
 |  |  |                "py.jpg", "ny.jpg", | 
 |  |  |                "pz.jpg", "nz.jpg" | 
 |  |  |             ]); | 
 |  |  |          } | 
 |  |  |          // 太阳 | 
 |  |  |          // let sky = new Sky(); | 
 |  |  |          // sky.scale.setScalar( 450000 ); | 
 |  |  | 
 |  |  |                   break; | 
 |  |  |                case 'Space': | 
 |  |  |                   if ( object.canJump === true )  { | 
 |  |  |                      object.velocity.y += 350; | 
 |  |  |                      object.velocity.y += 450; | 
 |  |  |                   } | 
 |  |  |                   object.canJump = false; | 
 |  |  |                   break; | 
 |  |  | 
 |  |  |             this.direction.z = Number( this.moveForward ) - Number( this.moveBackward ); | 
 |  |  |             this.direction.x = Number( this.moveRight ) - Number( this.moveLeft ); | 
 |  |  |             this.direction.normalize(); // this ensures consistent movements in all directions | 
 |  |  |             if ( this.moveForward || this.moveBackward ) this.velocity.z -= this.direction.z * 400.0 * delta; | 
 |  |  |             if ( this.moveLeft || this.moveRight ) this.velocity.x -= this.direction.x * 400.0 * delta; | 
 |  |  |             if ( this.moveForward || this.moveBackward ) this.velocity.z -= this.direction.z * 2000.0 * delta; | 
 |  |  |             if ( this.moveLeft || this.moveRight ) this.velocity.x -= this.direction.x * 2000.0 * delta; | 
 |  |  |             if ( onObject === true ) { | 
 |  |  |                this.velocity.y = Math.max( 0, this.velocity.y ); | 
 |  |  |                this.canJump = true; | 
 |  |  | 
 |  |  |             crnTask.move(); | 
 |  |  |          } | 
 |  |  |       } | 
 |  |  |  | 
 |  |  |       // 功能方法区 | 
 |  |  |       this.changeStats = function () { | 
 |  |  |          if (this.stats.domElement.style.display === 'none') { | 
 |  |  |             this.stats.domElement.style.display = 'block'; | 
 |  |  |          } else { | 
 |  |  |             this.stats.domElement.style.display = 'none'; | 
 |  |  |          } | 
 |  |  |       } | 
 |  |  |       this.changeBackGround = function () { | 
 |  |  |          this.backgroundType = !this.backgroundType; | 
 |  |  |          this.initBackground(); | 
 |  |  |       } | 
 |  |  |    }, | 
 |  |  |  | 
 |  |  | }; |