Three.js利用dat.GUI如何简化试验流程详解(2)

gui.add()

这个方法是常用的添加方法,可以添加一个普通按钮,最小传入两个值,三四个值是设置范围

将设置属性添加到gui当中,gui.add(对象,属性,最小值,最大值)

如果对象里面的类是一个函数,如果需要触发的点击事件,只传入两个值就好了,点击的时候就可以触发到相关事件。

gui.add(controls, 'addCube'); 
gui.addColor()

这个方法添加的按钮时一个标准的颜色选择器,比如:

gui.addColor(param, 'color') 

.onChange()

这个方法是可以触发的回调函数,在值发生变动的时候会触发当前函数,比如

gui.addColor(param, 'color').onChange(function (val) { 
 
 rectLight.color.setHex(val); 
 
}); 

.listen()

如果当前只是想显示当前的值,而且监听当前的变化,就这么写:

gui.add(obj, 'key').listen(); 

效果案例

 

下面附上我的全部代码:

<!DOCTYPE html> 
<html lang="en"> 
<head> 
 <meta charset="UTF-8"> 
 <title>Title</title> 
 <style type="text/css"> 
  html, body { 
   margin: 0; 
   height: 100%; 
  } 
 
  canvas { 
   display: block; 
  } 
 
 </style> 
</head> 
<body onload="draw();"> 
 
</body> 
<script src="build/three.js"></script> 
<script src="examples/js/controls/OrbitControls.js"></script> 
<script src="examples/js/libs/stats.min.js"></script> 
<script src="examples/js/libs/dat.gui.min.js"></script> 
<script> 
 var renderer; 
 function initRender() { 
  renderer = new THREE.WebGLRenderer({antialias:true}); 
  renderer.setSize(window.innerWidth, window.innerHeight); 
  //告诉渲染器需要阴影效果 
  renderer.shadowMap.enabled = true; 
  renderer.shadowMap.type = THREE.PCFSoftShadowMap; // 默认的是,没有设置的这个清晰 THREE.PCFShadowMap 
  document.body.appendChild(renderer.domElement); 
 } 
 
 var camera; 
 function initCamera() { 
  camera = new THREE.PerspectiveCamera(45, window.innerWidth/window.innerHeight, 0.1, 1000); 
  camera.position.set(0, 40, 100); 
  camera.lookAt(new THREE.Vector3(0,0,0)); 
 } 
 
 var scene; 
 function initScene() { 
  scene = new THREE.Scene(); 
 } 
 
 //初始化dat.GUI简化试验流程 
 var gui; 
 function initGui() { 
  //声明一个保存需求修改的相关数据的对象 
  gui = { 
   lightY:30, //灯光y轴的位置 
   sphereX:0, //球的x轴的位置 
   sphereZ:0, //球的z轴的位置 
   cubeX:25, //立方体的x轴位置 
   cubeZ:-5 //立方体的z轴的位置 
  }; 
  var datGui = new dat.GUI(); 
  //将设置属性添加到gui当中,gui.add(对象,属性,最小值,最大值) 
  datGui.add(gui,"lightY",0,100); 
  datGui.add(gui,"sphereX",-30,30); 
  datGui.add(gui,"sphereZ",-30,30); 
  datGui.add(gui,"cubeX",0,60); 
  datGui.add(gui,"cubeZ",-30,30); 
 } 
 
 var light; 
 function initLight() { 
  scene.add(new THREE.AmbientLight(0x444444)); 
 
  light = new THREE.PointLight(0xffffff); 
  light.position.set(15,30,10); 
 
  //告诉平行光需要开启阴影投射 
  light.castShadow = true; 
 
  scene.add(light); 
 } 
 
 var sphere,cube; 
 function initModel() { 
  //上面的球 
  var sphereGeometry = new THREE.SphereGeometry(5,200,200); 
  var sphereMaterial = new THREE.MeshLambertMaterial({color:0xaaaaaa}); 
 
  sphere = new THREE.Mesh(sphereGeometry, sphereMaterial); 
  sphere.position.y = 5; 
 
  //告诉球需要投射阴影 
  sphere.castShadow = true; 
 
  scene.add(sphere); 
 
 
  //光源的球 
  var spGeometry = new THREE.SphereGeometry(0.5,20,20); 
  var spMaterial = new THREE.MeshPhysicalMaterial({color:0xffffff}); 
 
  var sp = new THREE.Mesh(spGeometry,spMaterial); 
 
  sp.position.set(15,30,10); 
 
  scene.add(sp); 
 
  //辅助工具 
  var helper = new THREE.AxisHelper(10); 
  scene.add(helper); 
 
  //立方体 
  var cubeGeometry = new THREE.CubeGeometry(10,10,8); 
  var cubeMaterial = new THREE.MeshLambertMaterial({color:0x00ffff}); 
 
  cube = new THREE.Mesh(cubeGeometry, cubeMaterial); 
  cube.position.x = 25; 
  cube.position.y = 5; 
  cube.position.z = -5; 
 
  //告诉立方体需要投射阴影 
  cube.castShadow = true; 
 
  scene.add(cube); 
 
  //底部平面 
  var planeGeometry = new THREE.PlaneGeometry(100,100); 
  var planeMaterial = new THREE.MeshStandardMaterial({color:0xaaaaaa}); 
 
  var plane = new THREE.Mesh(planeGeometry, planeMaterial); 
  plane.rotation.x = - 0.5 * Math.PI; 
  plane.position.y = -0; 
 
  //告诉底部平面需要接收阴影 
  plane.receiveShadow = true; 
 
  scene.add(plane); 
 
 } 
 
 //初始化性能插件 
 var stats; 
 function initStats() { 
  stats = new Stats(); 
  document.body.appendChild(stats.dom); 
 } 
 
 //用户交互插件 鼠标左键按住旋转,右键按住平移,滚轮缩放 
 var controls; 
 function initControls() { 
 
  controls = new THREE.OrbitControls( camera, renderer.domElement ); 
 
  // 如果使用animate方法时,将此函数删除 
  //controls.addEventListener( 'change', render ); 
  // 使动画循环使用时阻尼或自转 意思是否有惯性 
  controls.enableDamping = true; 
  //动态阻尼系数 就是鼠标拖拽旋转灵敏度 
  //controls.dampingFactor = 0.25; 
  //是否可以缩放 
  controls.enableZoom = true; 
  //是否自动旋转 
  controls.autoRotate = false; 
  //设置相机距离原点的最远距离 
  controls.minDistance = 100; 
  //设置相机距离原点的最远距离 
  controls.maxDistance = 200; 
  //是否开启右键拖拽 
  controls.enablePan = true; 
 } 
 
 function render() { 
  renderer.render( scene, camera ); 
 } 
 
 //窗口变动触发的函数 
 function onWindowResize() { 
 
  camera.aspect = window.innerWidth / window.innerHeight; 
  camera.updateProjectionMatrix(); 
  render(); 
  renderer.setSize( window.innerWidth, window.innerHeight ); 
 
 } 
 
 function animate() { 
  //更新控制器 
  render(); 
 
  //更新性能插件 
  stats.update(); 
 
  //更新相关位置 
  light.position.y = gui.lightY; 
  sphere.position.x = gui.sphereX; 
  sphere.position.z = gui.sphereZ; 
  cube.position.x = gui.cubeX; 
  cube.position.z = gui.cubeZ; 
 
  controls.update(); 
 
  requestAnimationFrame(animate); 
 } 
 
 function draw() { 
  initGui(); 
  initRender(); 
  initScene(); 
  initCamera(); 
  initLight(); 
  initModel(); 
  initControls(); 
  initStats(); 
 
  animate(); 
  window.onresize = onWindowResize; 
 } 
</script> 
</html> 
      

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