问动态更改svg的颜色并在three.js中作为纹理应用

EN

var mesh;
var scene = new THREE.Scene();

var camera = new THREE.PerspectiveCamera(50, 500 / 400, 0.1, 1000);
camera.position.z = 10;

var renderer = new THREE.WebGLRenderer({
    antialias: true
});
renderer.setSize(500, 400);
document.body.appendChild(renderer.domElement);

var svg = document.getElementById("svgContainer").querySelector("svg");
var svgData = (new XMLSerializer()).serializeToString(svg);

var canvas = document.createElement("canvas");
var svgSize = svg.getBoundingClientRect();
canvas.width = svgSize.width;
canvas.height = svgSize.height;
var ctx = canvas.getContext("2d");

var img = document.createElement("img");
var material;
img.setAttribute("src", "data:image/svg+xml;base64," + window.btoa(unescape(encodeURIComponent(svgData))));

img.onload = function() {
    ctx.drawImage(img, 0, 0);
    var texture = new THREE.Texture(canvas);
    texture.needsUpdate = true;
    var geometry = new THREE.SphereGeometry(3, 50, 50, 0, Math.PI * 2, 0, Math.PI * 2);
    material = new THREE.MeshBasicMaterial({
        map: texture
    });
    material.map.minFilter = THREE.LinearFilter;
    mesh = new THREE.Mesh(geometry, material);
    scene.add(mesh);
};



var colors = ["red", "orange", "yellow", "green", "blue"];


var c = 0;

function clickBody() {
    document.getElementById("test").setAttribute("fill", colors[c]);
    var svgData = (new XMLSerializer()).serializeToString(svg);
    img.setAttribute("src", "data:image/svg+xml;base64," + window.btoa(unescape(encodeURIComponent(svgData))));
    img.onload = function() {
        ctx.drawImage(img, 0, 0);
        var texture = new THREE.Texture(canvas);
        material.map = texture;
        material.map.needsUpdate = true;
        renderer.render(scene, camera);
    }
    c = c + 1;
    if (c == colors.length) {
        c = 0;
    }
}
document.body.addEventListener("click", clickBody)

var render = function() {
    requestAnimationFrame(render);
    mesh.rotation.y += 0.01;
    renderer.render(scene, camera);
};


render();