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Daily Creative Coding

元「30 min. Processing」。毎日、Creative Codingします。

球にいろいろなマテリアルを適用する

See the Pen materials for sphere by aadebdeb (@aadebdeb) on CodePen.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>[2017/03/23]materials for sphere</title>
  <style>
    body {
      margin: 0;
      overflow: hidden;
    }
  </style>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/stats.js/r16/Stats.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.6.3/dat.gui.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/84/three.min.js"></script>
  <script>

    window.onload = function() {
      init();
      render();
    };
    window.onresize = onResize;


    var camera, scene, renderer;
    var stats;
    var controller;
    var sphere;
    var spotLight, spotLightHelper;

    function init() {

      mouseX = 0;
      mouseY = 0;

      initGui();
      initStats();

      initScene();
      initCamera();
      initRenderer();

    }

    function initStats() {
      stats = new Stats();
      stats.setMode(0);
      stats.domElement.style.position = 'absolute';
      stats.domElement.style.left = '0px';
      stats.domElement.style.top = '0px';
      document.body.appendChild(stats.domElement);
    }

    function initGui() {
      controller = new function() {
        this.lightAngleSpeed = 0.01;
        this.isLightHelperVisible = true;
        this.showsShadow = false;
        this.material = 'basic';
      };

      gui = new dat.GUI();
      gui.add(controller, 'lightAngleSpeed', 0, 0.05);
      gui.add(controller, 'isLightHelperVisible').onChange(function(e) {
        spotLightHelper.visible = e;
      });
      gui.add(controller, 'showsShadow').onChange(function(e) {
        renderer.shadowMap.enabled = e;
      });
      gui.add(controller, 'material', ['basic', 'normal', 'lambert', 'phong', 'standard']).onChange(function(e) {
        setupSphere(e);
      });
    }

    function initRenderer() {
      renderer = new THREE.WebGLRenderer();
      renderer.setClearColor(new THREE.Color(0xcccccc));
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.shadowMap.enabled = controller.showsShadow;
      document.body.appendChild(renderer.domElement);
    }


    function initCamera() {
      camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1500);
      camera.position.set(100, 100, 100);
      camera.lookAt(scene.position);
    }

    function initScene() {
      scene = new THREE.Scene();

      var plane = new THREE.Mesh(
        new THREE.PlaneGeometry(200, 200),
        new THREE.MeshLambertMaterial(0xffffff)
      );
      plane.rotation.x = -Math.PI / 2;
      plane.position.set(0, 0, 0);
      plane.receiveShadow = true;
      scene.add(plane);

      setupSphere(controller.material);

      var ambientLight = new THREE.AmbientLight(0x999999);
      scene.add(ambientLight);

      spotLight = new THREE.SpotLight(0xffffff);
      spotLight.posAngle = 0;
      setSpotLightPosition();
      spotLight.castShadow = true;
      spotLight.target = sphere;
      scene.add(spotLight);

      spotLightHelper = new THREE.SpotLightHelper(spotLight);
      spotLightHelper.visible = controller.isLightHelperVisible;
      scene.add(spotLightHelper);
    }

    function setupSphere(materialName) {
      scene.remove(sphere);
      switch(materialName) {
        case 'basic':
          sphere = new THREE.Mesh(
            new THREE.SphereGeometry(20, 20, 20),
            new THREE.MeshBasicMaterial(0xffffff)
          );
          break;
        case 'normal':
          sphere = new THREE.Mesh(
            new THREE.SphereGeometry(20, 20, 20),
            new THREE.MeshNormalMaterial(0xffffff)
          );
          break;
        case 'lambert':
          sphere = new THREE.Mesh(
            new THREE.SphereGeometry(20, 20, 20),
            new THREE.MeshLambertMaterial(0xffffff)
          );
          break;
        case 'phong':
          sphere = new THREE.Mesh(
            new THREE.SphereGeometry(20, 20, 20),
            new THREE.MeshPhongMaterial(0xffffff)
          );
          break;
        case 'standard':
          sphere = new THREE.Mesh(
            new THREE.SphereGeometry(20, 20, 20),
            new THREE.MeshStandardMaterial(0xffffff)
          );
          break;
      }
      sphere.position.set(0, 30, 0);
      sphere.castShadow = true;
      scene.add(sphere);
    }

    function setSpotLightPosition() {
      spotLight.position.x = 50 * Math.cos(spotLight.posAngle);
      spotLight.position.y = 50;
      spotLight.position.z = 50 * Math.sin(spotLight.posAngle);
    }


    function render() {
      spotLight.posAngle += controller.lightAngleSpeed;
      setSpotLightPosition();
      spotLightHelper.update();
      stats.update();
      renderer.render(scene, camera);
      requestAnimationFrame(render);
    }

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


  </script>
</head>
<body>
</body>
</html>
f:id:aa_debdeb:20170321090543p:plain