How to load SVG file into SVGRenderer in three.js

周星星9527

发布于 2021-11-15 05:04:45

5.8K00

代码可运行

文章被收录于专栏：javascript趣味编程javascript趣味编程

运行总次数：0

代码可运行

原文：

https://stackoverflow.com/questions/33140342/how-to-load-svg-file-into-svgrenderer-in-three-js

I'm trying to use SVGRenderer in three.js (http://threejs.org/examples/#svg_sandbox). The example shows you how to make an SVG element (a circle) on the fly. I want to import an SVG file that I already have in my computer. How would I do that?

The createElementNS command doesn't seem to support importing SVG files?

I essentially want my image.svg to be displayed on a three.js scene.

You can use the THREE.SVGLoader() Library to achieve it :

核心代码：

scene = new THREE.Scene();
  scene.add(svgObject);

  var ambient = new THREE.AmbientLight(0x80ffff);
  scene.add(ambient);
  var directional = new THREE.DirectionalLight(0xffff00);
  directional.position.set(-1, 0.5, 0);
  scene.add(directional);
  renderer = new THREE.SVGRenderer();
  renderer.setClearColor(0xf0f0f0);
  renderer.setSize(window.innerWidth, window.innerHeight - 5);
  document.body.appendChild(renderer.domElement);

  window.addEventListener('resize', onWindowResize, false);
}

function onWindowResize() {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(window.innerWidth, window.innerHeight);
}

function animate() {
  requestAnimationFrame(animate);
  render();
}

function render() {
  var time = Date.now() * 0.0002;
  camera.position.x = Math.sin(time) * 200;
  camera.position.z = Math.cos(time) * 200;
  camera.lookAt(scene.position);
  renderer.render(scene, camera);
}

CSS：

* {
  margin: 0
}

依赖文件：

<script src="http://threejs.org/build/three.min.js"></script>
<script src="http://threejs.org/examples/js/renderers/SVGRenderer.js"></script>
<script src="http://threejs.org/examples/js/renderers/Projector.js"></script>
<script src="http://threejs.org/examples/js/loaders/SVGLoader.js"></script>
<script>
  /**
   * @name LegacySVGLoader
   * @author mrdoob / http://mrdoob.com/
   * @author zz85 / http://joshuakoo.com/
   * @see https://github.com/mrdoob/three.js/issues/14387
   */

  THREE.LegacySVGLoader = function(manager) {

    this.manager = (manager !== undefined) ? manager : THREE.DefaultLoadingManager;

  };

  THREE.LegacySVGLoader.prototype = {

    constructor: THREE.LegacySVGLoader,

    load: function(url, onLoad, onProgress, onError) {

      var scope = this;

      var parser = new DOMParser();

      var loader = new THREE.FileLoader(scope.manager);
      loader.load(url, function(svgString) {

        var doc = parser.parseFromString(svgString, 'image/svg+xml'); // application/xml

        onLoad(doc.documentElement);

      }, onProgress, onError);

    }

  };
</script>