我正在使用three.js创建多个BoxGeometries,并使用tween.js为该几何图形的所有顶点设置动画。
首先,所有多维数据集应随机变形,直到我调用 stopTweens()。然后,所有顶点都应返回其默认位置。
我的问题是,只有最后一个多维数据集可以通过视觉重置。其他选项也进行了补间,但是 verticesNeedUpdate 似乎没有设置为 true ,因此屏幕上没有任何反应。
这是我的代码:
var scene_03_TweenArr = [];
创建立方体的功能:
function createCubes(){
for (i = 0; i < 10; i++) {
var CubeGeometry = new THREE.BoxGeometry( 4, 4, 4, 5, 5, 5 );
var CubeMaterial = new THREE.MeshPhongMaterial( {color: 0xffffff} );
var cube = new THREE.Mesh( CubeGeometry, CubeMaterial );
scene_03.add( cube );
cube.position.x = -40+5*i;
tt_animate_vertices(cube);
}
}
随机设置立方体动画的功能:
function tt_animate_vertices(object) {
for( j = 0; j < object.geometry.vertices.length; j++ ){
var previousX = object.geometry.vertices[j].x;
var previousY = object.geometry.vertices[j].y;
var previousZ = object.geometry.vertices[j].z;
var tween = new TWEEN.Tween(object.geometry.vertices[j]);
tween.to({ x: (0.25*Math.random()+1)*previousX, y: (0.25*Math.random()+1)*previousY, z: (0.25*Math.random()+1)*previousZ }, 5000 + Math.random()*5000);
var tween2 = new TWEEN.Tween(object.geometry.vertices[j]);
tween2.to({ x: previousX, y: previousY, z: previousZ }, 5000 + Math.random()*5000);
tween.onUpdate(function(){
object.geometry.verticesNeedUpdate = true;
});
tween2.onUpdate(function(){
object.geometry.verticesNeedUpdate = true;
});
tween.chain(tween2);
tween2.chain(tween);
tween.start();
var verticeTween = [object, tween, tween2, j, previousX, previousY, previousZ ];
scene_03_TweenArr.push(verticeTween);
}
}
停止补间并将多维数据集顶点重置为默认值的功能:
function stopTweens(){
for (let k = 0; k < scene_03_TweenArr.length; k++) {
scene_03_TweenArr[k][1].stop();
scene_03_TweenArr[k][2].stop();
var object = scene_03_TweenArr[k][0];
var index = scene_03_TweenArr[k][3];
var prevX = scene_03_TweenArr[k][4];
var prevY = scene_03_TweenArr[k][5];
var prevZ = scene_03_TweenArr[k][6];
var tween = new TWEEN.Tween(object.geometry.vertices[index]);
tween.to({x: prevX, y: prevY, z: prevZ }, 300)
tween.onUpdate(function(){
object.geometry.verticesNeedUpdate = true;
});
tween.start();
object.geometry.verticesNeedUpdate = true;
}
}
在这里,我设法以相同的方式使其在JSFiddle中运行:
答案 0 :(得分:0)
根据我的经验,在使用数组时,最好在循环内使用let
关键字。
function stopTweens(){
for (let k = 0; k < scene_03_TweenArr.length; k++) {
scene_03_TweenArr[k][1].stop();
scene_03_TweenArr[k][2].stop();
let object = scene_03_TweenArr[k][0];
let index = scene_03_TweenArr[k][3];
let prevX = scene_03_TweenArr[k][4];
let prevY = scene_03_TweenArr[k][5];
let prevZ = scene_03_TweenArr[k][6];
var tween = new TWEEN.Tween(object.geometry.vertices[index]);
tween.to({x: prevX, y: prevY, z: prevZ }, 300)
tween.onUpdate(function(){
object.geometry.verticesNeedUpdate = true;
});
tween.start();
object.geometry.verticesNeedUpdate = true;
}
}