javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!-- Licensed under a BSD license. See license.html for license -->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
    <title>Three.js - Primitives</title>
    <style>
    body {
        margin: 0;
    }
    #c {
        width: 100vw;
        height: 100vh;
        display: block;
    }
    </style>
  </head>
  <body>
    <canvas id="c"></canvas>
  </body>
<script src="resources/threejs/r93/three.min.js"></script>
<script src="resources/threejs-lessons-helper.js"></script> <!-- you can and should delete this script. it is only used on the site to help with errors -->
<script>
'use strict';

function main() {
  const canvas = document.querySelector('#c');
  const renderer = new THREE.WebGLRenderer({canvas: canvas});
  renderer.setClearColor(0xAAAAAA);

  const fov = 40;
  const aspect = 2;  // the canvas default
  const zNear = 0.1;
  const zFar = 1000;
  const camera = new THREE.PerspectiveCamera(fov, aspect, zNear, zFar);
  camera.position.z = 40;

  const scene = new THREE.Scene();

  {
    const light = new THREE.DirectionalLight(0xffffff, 1);
    light.position.set(-1, 2, 4);
    scene.add(light);
  }
  {
    const light = new THREE.DirectionalLight(0xffffff, 1);
    light.position.set(1, -2, -4);
    scene.add(light);
  }

  const objects = [];
  const spread = 15;

  function addObject(x, y, obj) {
    obj.position.x = x * spread;
    obj.position.y = y * spread;

    scene.add(obj);
    objects.push(obj);
  }

  function createMaterial() {
    const material = new THREE.MeshPhongMaterial({
      side: THREE.DoubleSide,
    });

    const hue = Math.random();
    const saturation = 1;
    const luminance = .5;
    material.color.setHSL(hue, saturation, luminance);

    return material;
  }

  function addSolidGeometry(x, y, geometry) {
    const mesh = new THREE.Mesh(geometry, createMaterial());
    addObject(x, y, mesh);
  }

  {
    const loader = new THREE.FontLoader();
    loader.load('resources/threejs/fonts/helvetiker_regular.typeface.json', (font) => {
      const geometry = new THREE.TextBufferGeometry('three.js', {
        font: font,
        size: 3.0,
        height: .2,
        curveSegments: 12,
        bevelEnabled: true,
        bevelThickness: 0.15,
        bevelSize: .3,
        bevelSegments: 5,
      });

      addSolidGeometry(-.5, 0, geometry);

      const mesh = new THREE.Mesh(geometry, createMaterial());
      geometry.computeBoundingBox();
      geometry.boundingBox.getCenter(mesh.position).multiplyScalar(-1);

      const parent = new THREE.Object3D();
      parent.add(mesh);

      addObject(.5, 0, parent);
    });
  }

  function resizeRendererToDisplaySize(renderer) {
    const canvas = renderer.domElement;
    const width = canvas.clientWidth;
    const height = canvas.clientHeight;
    const needResize = canvas.width !== width || canvas.height !== height;
    if (needResize) {
      renderer.setSize(width, height, false);
    }
    return needResize;
  }

  function render(time) {
    time *= 0.001;

    if (resizeRendererToDisplaySize(renderer)) {
      const canvas = renderer.domElement;
      camera.aspect = canvas.clientWidth / canvas.clientHeight;
      camera.updateProjectionMatrix();
    }

    objects.forEach((obj, ndx) => {
      const speed = .5 + ndx * .05;
      const rot = time * speed;
      obj.rotation.x = rot;
      obj.rotation.y = rot;
    });

    renderer.render(scene, camera);

    requestAnimationFrame(render);
  }

  requestAnimationFrame(render);
}

main();
</script>
</html>