threejs 实现小飞机建模

雨点打透心脏的1/2处 2022-11-28 15:29 206阅读 0赞

## html部分 ##

<!DOCTYPE html>
    <html lang="en" class="no-js">
    	<head>
    		<meta charset="UTF-8" />
    		<title>飞机</title>
    		<script type="text/javascript" src="js/three.js"></script>
    		<script type="text/javascript" src="js/main.js"/></script>
    		<style type="text/css">
    			.world {
    				position: absolute;
    				width: 100%;
    				height: 100%;
    				overflow: hidden;
    				background: linear-gradient(to bottom, #40405c 0%, #6f71aa 80%, #8a76ab 100%);
    			}
    		</style>
    	</head>
    	<body>
    		<div class="world" id="world"></div>
    	</body>
    </html>

## js部分 ##

//将会用到的颜色
    var Colors = {
        red:0xf25346,
        white:0xd8d0d1,
        brown:0x59332e,
        pink:0xF5986E,
        brownDark:0x23190f,
        blue:0x68c3c0,
    };
    
    var scene,
        camera, fieldOfView, aspectRatio, nearPlane, farPlane,
        renderer, container;
    
    //相对于屏幕鼠标坐标
    
    var HEIGHT, WIDTH,
        mousePos = { x: 0, y: 0 };
    
    //初始化
    
    function createScene() {
    
      HEIGHT = window.innerHeight;
      WIDTH = window.innerWidth;
    
      scene = new THREE.Scene();
      aspectRatio = WIDTH / HEIGHT;
      fieldOfView = 60;
      nearPlane = 1;
      farPlane = 10000;
      camera = new THREE.PerspectiveCamera(
        fieldOfView,
        aspectRatio,
        nearPlane,
        farPlane
        );
      scene.fog = new THREE.Fog(0xFFE4FF, 100,950);
      camera.position.x = 0;
      camera.position.z = 200;
      camera.position.y = 100;
    
      renderer = new THREE.WebGLRenderer({ alpha: true, antialias: true });
      renderer.setSize(WIDTH, HEIGHT);
      renderer.shadowMap.enabled = true;
      container = document.getElementById('world');
      container.appendChild(renderer.domElement);
    
      window.addEventListener('resize', handleWindowResize, false);
    }
    
    // 窗口改变
    
    function handleWindowResize() {
      HEIGHT = window.innerHeight;
      WIDTH = window.innerWidth;
      renderer.setSize(WIDTH, HEIGHT);
      camera.aspect = WIDTH / HEIGHT;
      camera.updateProjectionMatrix();
    }
    
    
    // 光源
    
    var ambientLight, hemisphereLight, shadowLight;
    
    function createLights() {
    
      hemisphereLight = new THREE.HemisphereLight(0xaaaaaa,0x000000, .9)
      shadowLight = new THREE.DirectionalLight(0xffffff, .9);
      shadowLight.position.set(150, 350, 350);
      shadowLight.castShadow = true;
      shadowLight.shadow.camera.left = -400;
      shadowLight.shadow.camera.right = 400;
      shadowLight.shadow.camera.top = 400;
      shadowLight.shadow.camera.bottom = -400;
      shadowLight.shadow.camera.near = 1;
      shadowLight.shadow.camera.far = 900;
      shadowLight.shadow.mapSize.width = 2048;
      shadowLight.shadow.mapSize.height = 2048;
    
      scene.add(hemisphereLight);
      scene.add(shadowLight);
    }
    
    
    var AirPlane = function(){
    	this.mesh = new THREE.Object3D();
      this.mesh.name = "airPlane";
    
      // Create the cabin
    	var geomCockpit = new THREE.BoxGeometry(60,50,50,1,1,1);//长宽高 都是一段
      var matCockpit = new THREE.MeshPhongMaterial({color:Colors.blue, shading:THREE.FlatShading});
      var cockpit = new THREE.Mesh(geomCockpit, matCockpit);
    	cockpit.castShadow = true;
      cockpit.receiveShadow = true;
      this.mesh.add(cockpit);
    
      // Create Engine
      var geomEngine = new THREE.BoxGeometry(20,50,50,1,1,1);
      var matEngine = new THREE.MeshPhongMaterial({color:Colors.white, shading:THREE.FlatShading});
      var engine = new THREE.Mesh(geomEngine, matEngine);
      engine.position.x = 40;
      engine.castShadow = true;
      engine.receiveShadow = true;
    	this.mesh.add(engine);
    
      // Create Tailplane
    
      var geomTailPlane = new THREE.BoxGeometry(15,20,5,1,1,1);
      var matTailPlane = new THREE.MeshPhongMaterial({color:Colors.red, shading:THREE.FlatShading});
      var tailPlane = new THREE.Mesh(geomTailPlane, matTailPlane);
      tailPlane.position.set(-35,25,0);
      tailPlane.castShadow = true;
      tailPlane.receiveShadow = true;
    	this.mesh.add(tailPlane);
    
      // Create Wing
    
      var geomSideWing = new THREE.BoxGeometry(40,8,150,1,1,1);
      var matSideWing = new THREE.MeshPhongMaterial({color:Colors.red, shading:THREE.FlatShading});
      var sideWing = new THREE.Mesh(geomSideWing, matSideWing);
      sideWing.position.set(0,0,0);
      sideWing.castShadow = true;
      sideWing.receiveShadow = true;
    	this.mesh.add(sideWing);
    
      // 螺旋桨
    
      var geomPropeller = new THREE.BoxGeometry(20,10,10,1,1,1);
      var matPropeller = new THREE.MeshPhongMaterial({color:Colors.brown, shading:THREE.FlatShading});
      this.propeller = new THREE.Mesh(geomPropeller, matPropeller);
      this.propeller.castShadow = true;
      this.propeller.receiveShadow = true;
    
      // Blades
    
      var geomBlade = new THREE.BoxGeometry(1,100,20,1,1,1);
      var matBlade = new THREE.MeshPhongMaterial({color:Colors.brownDark, shading:THREE.FlatShading});
    
      var blade = new THREE.Mesh(geomBlade, matBlade);
      blade.position.set(8,0,0);
      blade.castShadow = true;
      blade.receiveShadow = true;
    	this.propeller.add(blade);
      this.propeller.position.set(50,0,0);
      this.mesh.add(this.propeller);
    };
    
    Sky = function(){
      this.mesh = new THREE.Object3D();
      this.nClouds = 20;
      this.clouds = [];
      var stepAngle = Math.PI*2 / this.nClouds;
      for(var i=0; i<this.nClouds; i++){
        var c = new Cloud();
        this.clouds.push(c);
        var a = stepAngle*i;
        var h = 750 + Math.random()*200;
        c.mesh.position.y = Math.sin(a)*h;
        c.mesh.position.x = Math.cos(a)*h;
        c.mesh.position.z = -400-Math.random()*400;
        c.mesh.rotation.z = a + Math.PI/2;
        var s = 1+Math.random()*2;
        c.mesh.scale.set(s,s,s);
        this.mesh.add(c.mesh);
      }
    }
    
    Sea = function(){
      var geom = new THREE.CylinderGeometry(600,600,800,40,10);
      geom.applyMatrix(new THREE.Matrix4().makeRotationX(-Math.PI/2));
      var mat = new THREE.MeshPhongMaterial({
        color:Colors.blue,
        transparent:true,
        opacity:.6,
        shading:THREE.FlatShading,
      });
      this.mesh = new THREE.Mesh(geom, mat);
      this.mesh.receiveShadow = true;
    }
    
    Cloud = function(){
      this.mesh = new THREE.Object3D();
      this.mesh.name = "cloud";
      var geom = new THREE.CubeGeometry(20,20,20);
      var mat = new THREE.MeshPhongMaterial({
        color:Colors.white,
      });
    
      var nBlocs = 3+Math.floor(Math.random()*3);
      for (var i=0; i<nBlocs; i++ ){
        var m = new THREE.Mesh(geom.clone(), mat);
        m.position.x = i*15;
        m.position.y = Math.random()*10;
        m.position.z = Math.random()*10;
        m.rotation.z = Math.random()*Math.PI*2;
        m.rotation.y = Math.random()*Math.PI*2;
        var s = .1 + Math.random()*.9;
        m.scale.set(s,s,s);
        m.castShadow = true;
        m.receiveShadow = true;
        this.mesh.add(m);
      }
    }
    
    // 3D模型
    var sea;
    var airplane;
    
    function createPlane(){
      airplane = new AirPlane();
      airplane.mesh.scale.set(.25,.25,.25);
      airplane.mesh.position.y = 100;
      scene.add(airplane.mesh);
    }
    
    function createSea(){
      sea = new Sea();
      sea.mesh.position.y = -600;
      scene.add(sea.mesh);
    }
    
    function createSky(){
      sky = new Sky();
      sky.mesh.position.y = -600;
      scene.add(sky.mesh);
    }
    
    function loop(){
      updatePlane();
      sea.mesh.rotation.z += .004;
      sky.mesh.rotation.z += .01;
      renderer.render(scene, camera);
      requestAnimationFrame(loop);
    }
    
    function updatePlane(){
      var targetY = normalize(mousePos.y,-.75,.75,25, 175);
      var targetX = normalize(mousePos.x,-.75,.75,-100, 100);
      airplane.mesh.position.y = targetY;
      airplane.mesh.position.x = targetX;
      airplane.propeller.rotation.x += 0.3;
    }
    
    function normalize(v,vmin,vmax,tmin, tmax){
      var nv = Math.max(Math.min(v,vmax), vmin);
      var dv = vmax-vmin;
      var pc = (nv-vmin)/dv;
      var dt = tmax-tmin;
      var tv = tmin + (pc*dt);
      return tv;
    }
    
    function init(event){
      document.addEventListener('mousemove', handleMouseMove, false);
      createScene();
      createLights();
      createPlane();
      createSea();
      createSky();
      loop();
    }
    
    
    //键盘事件
    (function setKeyEvents(){
                window.addEventListener('keydown',function(e){
                    console.log(e);
                    switch(e.keyCode){
                        case 81:
                            camera.position.x += 1;
                            console.log('q');
                            break;
                        case 69:
                            camera.position.x -= 1;
                            console.log('e');
                            break;
                        case 39:
                            camera.position.y += 1;
                            console.log('右');
                            break;
                        case 37:
                            camera.position.y -= 1;
                            console.log('左');
                            break;
                        case 38:
                            camera.position.z += 1;
                            console.log('上');
                            break;
                        case 40:
                            camera.position.z -= 1;
                            console.log('下');
                    }
                    
                    renderer.render(scene, camera);
                }); 
            })();
    
    
    // 鼠标事件
    
    var mousePos = { x: 0, y: 0 };
    
    function handleMouseMove(event) {
      var tx = -1 + (event.clientX / WIDTH)*2;
      var ty = 1 - (event.clientY / HEIGHT)*2;
      mousePos = {x:tx, y:ty};
    }
    
    window.addEventListener('load', init, false);

![1221.png][]

[1221.png]: /images/20221124/65abfab96d6d4ee88d1ede8e43cd6a01.png