三JS立方体吐温JS基础知识 [英] Tween JS basics on three JS cube

问题描述

我是新来的吐温JS，并试图让使用吐温移动到右侧的一个简单的动画。

I am new to Tween JS, and trying to make a simple animation of moving to the right using Tween.

下面是init函数我的code（我用三JS）：

Below is my code in the init function ( I am using Three JS):

var geometry = new THREE.CylinderGeometry( 200,200, 200, 4, 0 );
    var material =  new THREE.MeshPhongMaterial( { ambient: 0xf0f0f0, color: 0x006699, specular: 0x006699, shininess: 60, shading: THREE.FlatShading } );
    var mesh = new THREE.Mesh( geometry, material );
    mesh.position.x = 0;
    mesh.position.y = 0;
    mesh.position.z = 0;
    mesh.updateMatrix();
    mesh.matrixAutoUpdate = false;
    scene.add( mesh );

     var tween = new TWEEN.Tween( { x: 0, y: 0 } )
     .to( { x: 400 }, 2000 )
     .easing( TWEEN.Easing.Elastic.InOut )
     .onUpdate( function () {

      mesh.position.x =  Math.round( this.x );
       } ).start();

和我的动画的功能：

requestAnimationFrame(animate);        
renderer.render(scene, camera);
TWEEN.update();
update();

立方体是有，但补间不工作。有什么我错过？

The cube is there but the tween is not working. Is there something I miss?

推荐答案

下面是我做我的现场。

The following is what I did to my scene.

1. 创建一个单独的渲染（）函数

1. Create a separate render() function

把吐温code为可调用的函数。你想在这个函数的开始删除所有补间。我不完全知道为什么，但我了解到，从教程code。

Put the TWEEN code into a function that you can call. You want to remove all TWEENs at beginning of this function. I am not entirely sure why, but I learned that from tutorial code.

在吐温函数，调用上呈现更新功能。

In TWEEN function, call render function on update.

通过你不停的动画循环动画中的呼叫TWEEN.update。注：渲染（）将被调用每次更新时间吐温

Call TWEEN.update in your animation through your non-stop animation loop. Note: render() will be called every time you update the TWEEN.

以下是骨架code。检查是否可以适用于你的程序：

The following is the skeleton code. Check if that could apply to your program:

//TWEEN function
function moveObject( ) {
    TWEEN.removeAll();
    new TWEEN.Tween( { x: 0, y: 0 } )
    .to( { x: 400 }, 2000 )
    .easing( TWEEN.Easing.Elastic.InOut )
    .onUpdate( render )
    .start();   
};
//NON-STOP animation loop
function animation(){
    requestAnimationFrame(animate);  
    TWEEN.update();
}
//Render function
function render(){
    renderer.render(scene, camera);
}

希望它帮助。

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