我尝试在动画期间使用 ThreeJS morphcolor 属性更改对象的面/顶点颜色，但它不起作用。
我的代码是
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Animation Cube Geometry</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r71/three.js" type="text/javascript"></script>
<style>
#canvas {
border: 1px solid black;
width: 100%;
}
</style>
</head>
<body>
<input type="button" value="start" onclick="onbtnClick(this);"></input>
<br>
<canvas id="canvas"></canvas>
<script type="text/javascript">
var size_width = window.innerWidth;
var size_height = window.innerHeight;
var player, controls;
var oldTime, time, delta;
var isAnimationON = false;
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, size_width / size_height, 0.1, 1000);
camera.position.x = 50;
camera.position.y = 50;
camera.position.z = 50;
//camera.rotation.x = 1.4;
scene.add(camera);
var canvasContainer = document.getElementById('canvas');
var renderer = new THREE.WebGLRenderer({
canvas: canvasContainer,
antialias: false,
preserveDrawingBuffer: true
});
renderer.setClearColor(new THREE.Color(0xFFFFFF), 1);
renderer.setSize(size_width, size_height);
controls = new THREE.OrbitControls(camera, canvasContainer);
controls.addEventListener('change', render);
var m_vertices = [0, 0, 0, 5, 0, 0, 5, 5, 0, 0, 5, 0, 0, 0, 5, 5, 0, 5, 5, 5, 5, 0, 5, 5];
var m_results = [0, 0, 0, 5, 0, 0, 5, 5, 0, 0, 5, 0, 0, 0, 5, 5, 0, 5, 5, 5, 5, 0, 5, 5];
var m_faces = [0, 1, 3, 1, 2, 3, 4, 7, 5, 7, 6, 5, 0, 4, 1, 4, 5, 1, 1, 5, 2, 5, 6, 2, 2, 6, 3, 6, 7, 3, 4, 0, 7, 0, 3, 7];
var m_morphTargets = [{
"name": "animation_000000",
"vertices": [0, 0, 0, 5, 0, 0, 5, 5, 0, 0, 5, 0, 0, 0, 5, 5, 0, 5, 5, 5, 5, 0, 5, 5]
}, {
"name": "animation_000001",
"vertices": [0, 0, 0, 10, 0, 0, 10, 10, 0, 0, 10, 0, 0, 0, 10, 10, 0, 10, 10, 10, 10, 0, 10, 10]
}, {
"name": "animation_000002",
"vertices": [0, 0, 0, 15, 0, 0, 15, 15, 0, 0, 15, 0, 0, 0, 15, 15, 0, 15, 15, 15, 15, 0, 15, 15]
}, {
"name": "animation_000003",
"vertices": [0, 0, 0, 25, 0, 0, 25, 25, 0, 0, 25, 0, 0, 0, 25, 25, 0, 25, 25, 25, 25, 0, 25, 25]
}];
//Write Vertices
var vs = [];
var vc = [];
for (var x = 0, y = 1, z = 2; z < m_vertices.length; x = x + 3, y = y + 3, z = z + 3) {
vs.push(new THREE.Vector3(m_vertices[x], m_vertices[y], m_vertices[z]));
//vc.push(new THREE.Color( 0xff0000 ));
//vc.push(new THREE.Color( 0x00ff00 ));
//vc.push(new THREE.Color( 0x0000ff ));
}
//Write Faces
var fs = [];
for (var x = 0, y = 1, z = 2; z < m_faces.length; x = x + 3, y = y + 3, z = z + 3) {
var f = new THREE.Face3(m_faces[x], m_faces[y], m_faces[z]);
f.color.setHex(Math.random() * 0xffffff);
f.vertexColors.push(new THREE.Color(0xff0000));
f.vertexColors.push(new THREE.Color(0x00ff00));
f.vertexColors.push(new THREE.Color(0x0000ff));
fs.push(f);
}
//Write morphTargets
var geometry_morphTargets = [];
var geometry_morphColors = [];
var i, l, v, vl, dstVertices, srcVertices, scale = 1;
for (i = 0, l = m_morphTargets.length; i < l; i++) {
geometry_morphTargets[i] = {};
geometry_morphTargets[i].name = m_morphTargets[i].name;
geometry_morphTargets[i].vertices = [];
dstVertices = geometry_morphTargets[i].vertices;
srcVertices = m_morphTargets[i].vertices;
for (v = 0, vl = srcVertices.length; v < vl; v += 3) {
var vertex = new THREE.Vector3();
vertex.x = srcVertices[v] * scale;
vertex.y = srcVertices[v + 1] * scale;
vertex.z = srcVertices[v + 2] * scale;
dstVertices.push(vertex);
}
geometry_morphColors[i] = {};
geometry_morphColors[i].name = m_morphTargets[i].name;
geometry_morphColors[i].colors = [];
dstColors = geometry_morphColors[i].colors;
console.log(fs.length);
var faceLength = fs.length;
faceLength = 12;
for (v = 0; v < faceLength; v++) {
dstColors.push(new THREE.Color(Math.random() * 0xffffff));
//dstColors.push(new THREE.Color( Math.random() * 0xffffff ));
//dstColors.push(new THREE.Color( Math.random() * 0xffffff ));
}
}
var geometry = new THREE.Geometry();
geometry.vertices = vs;
geometry.faces = fs;
geometry.colors = vc;
geometry.morphTargets = geometry_morphTargets;
geometry.morphColors = geometry_morphColors;
geometry.colorsNeedUpdate = true;
geometry.computeFaceNormals();
geometry.computeVertexNormals();
geometry.computeBoundingBox();
geometry.computeBoundingSphere();
var material = new THREE.MeshBasicMaterial();
material.morphTargets = true;
material.morphColors = true;
//material.color= new THREE.Color( 0xff00ff );
material.vertexColors = THREE.FaceColors;
//material.vertexColors= THREE.VertexColors;
material.side = THREE.DoubleSide;
player = new THREE.MorphAnimMesh(geometry, material);
player.duration = 1000; // milliseconds
oldTime = time = new Date().getTime();
player.name = "Cube";
scene.add(player);
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
if (isAnimationON) {
time = new Date().getTime();
delta = time - oldTime;
oldTime = time;
player.updateAnimation(delta);
}
renderer.render(scene, camera);
}
function onbtnClick(ctrl) {
isAnimationON = !isAnimationON;
if (isAnimationON)
ctrl.value = "Stop";
else
ctrl.value = "Start";
}
animate();
</script>
</body>
</html>请告诉我如何使用变形颜色更改面/顶点颜色来制作动画
最佳答案
确认:Three.js R74 不支持“morphColors”
“morphColors”似乎不是 Geometry http://threejs.org/docs/index.html#Reference/Core/Geometry 的属性.
在一本关于 Three.js 的书中，我们可能会读到“geometry.morphColors”。然而，几何体来自 Blender。更一般地说，JS 的一个大问题是属性可以动态添加。
关于javascript - 如何在 Three.js 中使用 morphColor 更改动画的面/顶点颜色，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30392211/