javascript 3d网页 示例 ( three.js 初探 七)

Posted 2021-03-01 weihexincode

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

  1 "use strict"
  2 
  3 class InitControl{
  4     
  5     constructor(View, Three){
  6         this.view = View;
  7         this.three = Three;
  8         this.target = {object: null, isDown: false, isMove: false};
  9         this.dragTarget = {};
 10         this.group = this.add(new THREE.Group(), null, true);
 11         this.setDrag(Three.scene, Three.camera, Three.renderer, this.group.children);
 12         this.setOrbit(Three.scene, Three.camera, Three.renderer);
 13         this.setTransform(Three.scene, Three.camera, Three.renderer);
 14         this.setEvents(View, Three);
 15         this.view.updateLanguage(this.group, "ch");//更改为中文字体
 16     }
 17     
 18     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
 19         a = this.three.add(a, b);
 20         this.view.addList(a, b);
 21         if(c === undefined) this.setTarget(a, {focusList: true});
 22         return a;
 23     }
 24         
 25     remove (a){
 26         this.removeTarget(a);
 27         this.view.removeList(a);
 28         this.three.remove(a);
 29         this.three.update();
 30     }
 31     
 32     setDrag(scene, camera, renderer, children){
 33         let drag = new THREE.DragControls(children, camera, renderer.domElement);
 34         drag.addEventListener(‘hoveron‘, (e)=>{
 35             this.dragTarget.old = null;
 36             this.dragTarget.now = e.object;
 37         });
 38         drag.addEventListener(‘hoveroff‘, (e)=>{
 39             this.dragTarget.now = null;
 40             this.dragTarget.old = e.object;
 41         });
 42         drag.enabled = false;
 43         this.drag = drag;
 44     }
 45     
 46     setOrbit(scene, camera, renderer){
 47         let orbit = new THREE.OrbitControls(camera, renderer.domElement);
 48         orbit.target = new THREE.Vector3(0, 0, 0);//控件焦点
 49         //orbit.minPolarAngle = Math.PI * 0.3;//向上最大角度
 50         //orbit.maxPolarAngle = Math.PI * 0.4;//向下最大角度
 51         orbit.minDistance = camera.near;//最小距离
 52         orbit.maxDistance = camera.far;//最大距离
 53         orbit.autoRotateSpeed = 10;//自动旋转速度
 54         //orbit.panSpeed = 100;//鼠标旋转速度
 55         orbit.enableZoom = true;//是否启用缩放
 56         orbit.enableKeys = true;//是否启用键盘
 57         orbit.panSpeed = 1;//鼠标平移速度
 58         orbit.keyPanSpeed = 100;//按键平移的速度
 59         orbit.keys.LEFT = 65;//key a左
 60         orbit.keys.UP = 87;//key w前
 61         orbit.keys.RIGHT = 68;//key d右
 62         orbit.keys.BOTTOM = 83;//key s后
 63         orbit.addEventListener("change", ()=>{renderer.render(scene, camera);});
 64         this.orbit = orbit;
 65     }
 66     
 67     setTransform(scene, camera, renderer){
 68         var transform = new THREE.TransformControls(camera, renderer.domElement);
 69         transform.size = 1;
 70         scene.add(transform);
 71         this.transform = transform;
 72         transform.addEventListener( ‘dragging-changed‘, (e)=>{this.orbit.enabled = !e.value;});
 73         transform.addEventListener(‘change‘, (e)=>{
 74             let type = transform.getMode(), mesh = this.target.object || e.target.object;
 75             let hc = mesh.WHX.elem.listContent.mesh.object;
 76             switch(type){
 77                 case "translate": 
 78                     hc.position.x = mesh.position.x;
 79                     hc.position.y = mesh.position.y;
 80                     hc.position.z = mesh.position.z;
 81                 break;    
 82                 case "rotate": 
 83                     hc.rotation.x = mesh.rotation.x;
 84                     hc.rotation.y = mesh.rotation.y;
 85                     hc.rotation.z = mesh.rotation.z;
 86                 break;
 87                 case "scale": 
 88                     hc.scale.x = mesh.scale.x;
 89                     hc.scale.y = mesh.scale.y;
 90                     hc.scale.z = mesh.scale.z;
 91                 break;
 92                 default: break;
 93             }
 94             this.three.boxHelper.update();
 95             renderer.render(scene, camera);
 96         });
 97     }
 98     
 99     setTarget(object, param){
100         this.removeTarget(this.target.object);
101         if(!object || !object.WHX) return;
102         param = param || {};
103         this.three.boxHelper.setFromObject(object);
104         this.three.boxHelper.visible = true;
105         this.transform.attach(object);
106         if(param.focusListStyle === undefined) this.view.focusListStyle(object.WHX.elem.son);
107         if(param.focusList === true) this.view.focusList(object);
108         object.WHX.elem.listContent.mesh.father.style.display = "block";//if(param.listContent === undefined) this.view.objectContents(object);
109         this.target.object = object;
110         this.three.update();
111     }
112     
113     removeTarget(object){
114         if(!object || !object.WHX) return;
115         this.three.boxHelper.visible = false;
116         this.transform.detach(object);
117         this.view.focusListStyle(object.WHX.elem.son, "remove");
118         object.WHX.elem.listContent.mesh.father.style.display = "none"; //this.view.objectContents();
119         this.target.object = null;
120         this.three.update();
121     }
122     
123     setEvents(View, Three){
124         
125         let _holdGroup = null, getObject = (a)=>{
126             if(a.WHX_ID === undefined){return;}
127             let o = Three.scene.getObjectById(a.WHX_ID);
128             if(o === undefined){console.log("获取对象失败"); return;}
129             //let object = a.tagName === "SUMMARY" ? o.WHX.backGroup : o;
130             return o;
131         }
132         
133         
134         //scene -> list
135         let down = ()=>{this.target.isDown = true;}
136         let move = ()=>{if(this.target.isDown === true && this.target.isMove === false) this.target.isMove = true;}
137         let up = ()=>{
138             if(this.target.isMove === false) this.setTarget(this.dragTarget.now, {focusList:true});
139             this.target.isMove = false;
140             this.target.isDown = false;
141             Three.renderer.domElement.removeEventListener("mousedown", down);
142             Three.renderer.domElement.removeEventListener("mousemove", move);
143             Three.renderer.domElement.removeEventListener("mouseup", up);
144         }
145         View.addEvent(Three.renderer.domElement, "mousedown", down);
146         View.addEvent(Three.renderer.domElement, "mousemove", move);
147         View.addEvent(Three.renderer.domElement, "mouseup", up);
148         
149         
150         //list -> scene
151         View.targetCallback = (a)=>{
152             if(a.WHX_control_ID !== undefined){ //WHX_control_ID = 0 删除  1 复制  2 子级
153                 if(_holdGroup !== null) _holdGroup = null;
154                 if(a.WHX_control_ID === 2) a.style.background = "rgba(0, 0, 200, 0.5)";
155                 let o = this.target.object;
156                 switch(a.WHX_control_ID){
157                     case 0: this.remove(o); break;
158                     case 1: this.setTarget(this.add(o.clone(true), o)); break;
159                     case 2: _holdGroup = o; this.setTarget(o); break;
160                     default: break;
161                 }
162                 return;
163             }
164             
165             if(_holdGroup !== null){//分组操作
166                 let o = getObject(a);
167                 if(o){
168                     this.remove(o);
169                     this.add(o, _holdGroup);
170                 }
171                 _holdGroup = null; 
172                 View.right.t_control[3].style.background = "";
173                 this.setTarget(o); return;
174             }
175             
176             this.setTarget(getObject(a));
177         }
178         
179     }
180 
181 }