javascript 3d网页 示例 ( three.js 初探 七)

1 完整代码下载

　　https://pan.baidu.com/s/1JJyVcP2KqXsd5G6eaYpgHQ　　

　　提取码 3fzt (压缩包名： 2020-4-5-demo.zip)

2 图片展示

3 主要代码

 "use strict"

 class InitControl{

     constructor(View, Three){
         this.view = View;
         this.three = Three;
         this.target = {object: null, isDown: false, isMove: false};
         this.dragTarget = {};
         this.group = this.add(new THREE.Group(), null, true);
         this.setDrag(Three.scene, Three.camera, Three.renderer, this.group.children);
         this.setOrbit(Three.scene, Three.camera, Three.renderer);
         this.setTransform(Three.scene, Three.camera, Three.renderer);
         this.setEvents(View, Three);
         this.view.updateLanguage(this.group, "ch");//更改为中文字体
     }

     add (a, b, c){ // a 添加至-> b, c 如果没有定义,新添加的对象将自动获得焦点
         a = this.three.add(a, b);
         this.view.addList(a, b);
         if(c === undefined) this.setTarget(a, {focusList: true});
         return a;
     }

     remove (a){
         this.removeTarget(a);
         this.view.removeList(a);
         this.three.remove(a);
         this.three.update();
     }

     setDrag(scene, camera, renderer, children){
         let drag = new THREE.DragControls(children, camera, renderer.domElement);
         drag.addEventListener('hoveron', (e)=>{
             this.dragTarget.old = null;
             this.dragTarget.now = e.object;
         });
         drag.addEventListener('hoveroff', (e)=>{
             this.dragTarget.now = null;
             this.dragTarget.old = e.object;
         });
         drag.enabled = false;
         this.drag = drag;
     }

     setOrbit(scene, camera, renderer){
         let orbit = new THREE.OrbitControls(camera, renderer.domElement);
         orbit.target = new THREE.Vector3(0, 0, 0);//控件焦点
         //orbit.minPolarAngle = Math.PI * 0.3;//向上最大角度
         //orbit.maxPolarAngle = Math.PI * 0.4;//向下最大角度
         orbit.minDistance = camera.near;//最小距离
         orbit.maxDistance = camera.far;//最大距离
         orbit.autoRotateSpeed = 10;//自动旋转速度
         //orbit.panSpeed = 100;//鼠标旋转速度
         orbit.enableZoom = true;//是否启用缩放
         orbit.enableKeys = true;//是否启用键盘
         orbit.panSpeed = 1;//鼠标平移速度
         orbit.keyPanSpeed = 100;//按键平移的速度
         orbit.keys.LEFT = 65;//key a左
         orbit.keys.UP = 87;//key w前
         orbit.keys.RIGHT = 68;//key d右
         orbit.keys.BOTTOM = 83;//key s后
         orbit.addEventListener("change", ()=>{renderer.render(scene, camera);});
         this.orbit = orbit;
     }

     setTransform(scene, camera, renderer){
         var transform = new THREE.TransformControls(camera, renderer.domElement);
         transform.size = 1;
         scene.add(transform);
         this.transform = transform;
         transform.addEventListener( 'dragging-changed', (e)=>{this.orbit.enabled = !e.value;});
         transform.addEventListener('change', (e)=>{
             let type = transform.getMode(), mesh = this.target.object || e.target.object;
             let hc = mesh.WHX.elem.listContent.mesh.object;
             switch(type){
                 case "translate":
                     hc.position.x = mesh.position.x;
                     hc.position.y = mesh.position.y;
                     hc.position.z = mesh.position.z;
                 break;
                 case "rotate":
                     hc.rotation.x = mesh.rotation.x;
                     hc.rotation.y = mesh.rotation.y;
                     hc.rotation.z = mesh.rotation.z;
                 break;
                 case "scale":
                     hc.scale.x = mesh.scale.x;
                     hc.scale.y = mesh.scale.y;
                     hc.scale.z = mesh.scale.z;
                 break;
                 default: break;
             }
             this.three.boxHelper.update();
             renderer.render(scene, camera);
         });
     }

     setTarget(object, param){
         this.removeTarget(this.target.object);
         if(!object || !object.WHX) return;
         param = param || {};
         this.three.boxHelper.setFromObject(object);
         this.three.boxHelper.visible = true;
         this.transform.attach(object);
         if(param.focusListStyle === undefined) this.view.focusListStyle(object.WHX.elem.son);
         if(param.focusList === true) this.view.focusList(object);
         object.WHX.elem.listContent.mesh.father.style.display = "block";//if(param.listContent === undefined) this.view.objectContents(object);
         this.target.object = object;
         this.three.update();
     }

     removeTarget(object){
         if(!object || !object.WHX) return;
         this.three.boxHelper.visible = false;
         this.transform.detach(object);
         this.view.focusListStyle(object.WHX.elem.son, "remove");
         object.WHX.elem.listContent.mesh.father.style.display = "none"; //this.view.objectContents();
         this.target.object = null;
         this.three.update();
     }

     setEvents(View, Three){

         let _holdGroup = null, getObject = (a)=>{
             if(a.WHX_ID === undefined){return;}
             let o = Three.scene.getObjectById(a.WHX_ID);
             if(o === undefined){console.log("获取对象失败"); return;}
             //let object = a.tagName === "SUMMARY" ? o.WHX.backGroup : o;
             return o;
         }

         //scene -> list
         let down = ()=>{this.target.isDown = true;}
         let move = ()=>{if(this.target.isDown === true && this.target.isMove === false) this.target.isMove = true;}
         let up = ()=>{
             if(this.target.isMove === false) this.setTarget(this.dragTarget.now, {focusList:true});
             this.target.isMove = false;
             this.target.isDown = false;
             Three.renderer.domElement.removeEventListener("mousedown", down);
             Three.renderer.domElement.removeEventListener("mousemove", move);
             Three.renderer.domElement.removeEventListener("mouseup", up);
         }
         View.addEvent(Three.renderer.domElement, "mousedown", down);
         View.addEvent(Three.renderer.domElement, "mousemove", move);
         View.addEvent(Three.renderer.domElement, "mouseup", up);

         //list -> scene
         View.targetCallback = (a)=>{
             if(a.WHX_control_ID !== undefined){ //WHX_control_ID = 0 删除  1 复制  2 子级
                 if(_holdGroup !== null) _holdGroup = null;
                 if(a.WHX_control_ID === 2) a.style.background = "rgba(0, 0, 200, 0.5)";
                 let o = this.target.object;
                 switch(a.WHX_control_ID){
                     case 0: this.remove(o); break;
                     case 1: this.setTarget(this.add(o.clone(true), o)); break;
                     case 2: _holdGroup = o; this.setTarget(o); break;
                     default: break;
                 }
                 return;
             }

             if(_holdGroup !== null){//分组操作
                 let o = getObject(a);
                 if(o){
                     this.remove(o);
                     this.add(o, _holdGroup);
                 }
                 _holdGroup = null;
                 View.right.t_control[3].style.background = "";
                 this.setTarget(o); return;
             }

             this.setTarget(getObject(a));
         }

     }

 }