书接上回，这里讨论MeshAction网格行为！！！

一、搭建基础场景

let box:AbstractMesh;
let cube:AbstractMesh;
let sphere:AbstractMesh;
let cylinder:AbstractMesh;
let mat:PBRMaterial;

// 创建天空盒
const createSkyBox = (scene:Scene):void=>{
  const envTex = CubeTexture.CreateFromPrefilteredData('./env/environment.env',scene)
  scene.environmentTexture = envTex;
  scene.createDefaultSkybox(envTex,true,1000,0.2,true)
  scene.environmentIntensity = 1.5
}

// 创建网格
const creatMeshes=(scene:Scene):void=>{
  mat = new PBRMaterial('pbr')
  mat.albedoColor = new Color3(1,0,0);
  mat.roughness =1

  cube = MeshBuilder.CreateBox('cube',{size:2})
  cube.material = mat
  cube.position = new Vector3(-4,0,0)

  sphere = MeshBuilder.CreateSphere('sphere',{diameter:2})
  sphere.material = mat
  sphere.position = new Vector3(0,0,0)

  cylinder = MeshBuilder.CreateCylinder('cylinder',{diameter:2})
  cylinder.material = mat
  cylinder.position = new Vector3(4,0,0)

  // 创建行为
  // createActions(scene)
}

// 创建相机
new FreeCamera("camera",new Vector3(0,0,-8));

 

二、创建网格行为

const createActions=(scene:Scene):void=>{

  cube.actionManager = new ActionManager()
  /**
   * 点击之后放大
   */
  cube.actionManager.registerAction(
    new SetValueAction(
      ActionManager.OnPickDownTrigger,
      cube,
      "scaling",
      new Vector3(1.2,1.2,1.2)
  ))?.then(new SetValueAction(
      ActionManager.NothingTrigger,
      cube,
      "scaling",
      new Vector3(1,1,1)
  ))

  /**
   * 点击切换材质反照率颜色
   * 3秒内切成换绿色
   * 
   * 再次点击
   * 1秒内切换成蓝色
   */
  sphere.actionManager = new ActionManager()
  sphere.actionManager.registerAction(
    new InterpolateValueAction(
      ActionManager.OnPickDownTrigger,
      mat,
      "albedoColor",
      new Color3(0,1,0),
      2000
    )
  )?.then( 
    new InterpolateValueAction(
      ActionManager.OnPickDownTrigger,
      mat,
      "albedoColor",
      new Color3(0,0,1),
      1000
  ))

  
  /**
   * 圆柱体绕X轴旋转
   */
  scene.actionManager = new ActionManager()
  scene.actionManager.registerAction(
    new IncrementValueAction(
      ActionManager.OnEveryFrameTrigger,
      cylinder,
      "rotation.x",
      0.01,
    )
  )

}