samien
/
three.js
oglindă de https://github.com/mrdoob/three.js.git


			
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<!doctype html>
<html lang="en">
  <head>
    <title>three.js webgl - geometry - shapes</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <style>
      body {
        font-family: Monospace;
        background-color: #f0f0f0;
        margin: 0px;
        overflow: hidden;
      }
    </style>
  </head>
  <body>
    <canvas id="debug" style="position:absolute; left:100px"></canvas>

    <script src="../build/Three.js"></script>
    <script src="../src/extras/core/Curve.js"></script>
    <script src="../src/extras/geometries/TubeGeometry.js"></script>
    <script src="js/Stats.js"></script>


    <script>

    // Lets define some curves

    // Formula from http://mathworld.wolfram.com/HeartCurve.html
    THREE.HeartCurve = THREE.Curve.create(

      function(s) {
        this.scale = (s === undefined) ? 5 : s ;
      },

      function(t) {
          t *= 2 * Math.PI;
          var tx = 16 * Math.pow(Math.sin(t), 3);
              ty = 13 * Math.cos(t)
                - 5 * Math.cos(2 * t)
                - 2 * Math.cos(3 * t)
                - Math.cos(4 * t ),
              tz = 0;

          return new THREE.Vector3(tx, ty, tz).multiplyScalar(this.scale);

      }

    );


    // Viviani's Curve
    // http://en.wikipedia.org/wiki/Viviani%27s_curve
    THREE.VivianiCurve = THREE.Curve.create(

      function(radius) {

          this.radius = radius;
      },

      function(t) {
          t = t * 4 * Math.PI; // Normalized to 0..1
          var a = this.radius / 2;
          var tx = a * (1 + Math.cos(t)),
              ty = a * Math.sin(t),
              tz = 2 * a * Math.sin(t / 2);

          return new THREE.Vector3(tx, ty, tz);

      }

    );


    THREE.KnotCurve = THREE.Curve.create(

    function() {

    },

    function(t) {
        t *= 2 * Math.PI;
        
        var R = 10;
        var s = 50;
        var tx = s * Math.sin(t),
            ty = Math.cos(t) * (R + s * Math.cos(t)),
            tz = Math.sin(t) * (R + s * Math.cos(t));
        
        return new THREE.Vector3(tx, ty, tz);

    }

    );

    THREE.HelixCurve = THREE.Curve.create(

    function() {

    },

    function(t) {
        var a = 30; // radius
        var b = 150; //height
        var t2 = 2 * Math.PI * t * b / 30;
        var tx = Math.cos(t2) * a,
            ty = Math.sin(t2) * a,
            tz = b * t;

        return new THREE.Vector3(tx, ty, tz);

    }

    );

    var container, stats;

    var camera, scene, renderer;

    var text, plane;

    var targetRotation = 0;
    var targetRotationOnMouseDown = 0;

    var mouseX = 0;
    var mouseXOnMouseDown = 0;

    var windowHalfX = window.innerWidth / 2;
    var windowHalfY = window.innerHeight / 2;

    init();
    animate();

    function init() {

      container = document.createElement('div');
      document.body.appendChild(container);

      var info = document.createElement('div');
      info.style.position = 'absolute';
      info.style.top = '10px';
      info.style.width = '100%';
      info.style.textAlign = 'center';
      info.innerHTML = 'Simple procedurally generated 3D shapes example by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br/>Drag to spin';
      container.appendChild(info);

      scene = new THREE.Scene();

      camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
      camera.position.set(0, 50, 500);
      scene.add(camera);

      var light = new THREE.DirectionalLight(0xffffff);
      light.position.set(0, 0, 1);
      scene.add(light);

      parent = new THREE.Object3D();
      parent.position.y = 50;
      scene.add(parent);

      function addGeometry(geometry, color, x, y, z, rx, ry, rz, s) {

          // 3d shape
          var mesh = THREE.SceneUtils.createMultiMaterialObject(geometry, [new THREE.MeshLambertMaterial({
              color: color
          }), new THREE.MeshBasicMaterial({
              color: 0x000000,
              wireframe: true,
              transparent: true
          })]);

          if (geometry.debug) mesh.add(geometry.debug);
          
          mesh.position.set(x, y, z - 75);
          mesh.rotation.set(rx, ry, rz);
          mesh.scale.set(s, s, s);
          parent.add(mesh);

      }

      
      // var extrudePath = new THREE.SplineCurve3([
      //     new THREE.Vector3(0, 10, -10), new THREE.Vector3(10, 0, -10), new THREE.Vector3(20, 0, 0), new THREE.Vector3(30, 0, 10), new THREE.Vector3(30, 0, 20), new THREE.Vector3(20, 0, 30), new THREE.Vector3(10, 0, 30), new THREE.Vector3(0, 0, 30), new THREE.Vector3(-10, 10, 30), new THREE.Vector3(-10, 20, 30), new THREE.Vector3(0, 30, 30), new THREE.Vector3(10, 30, 30), new THREE.Vector3(20, 30, 15), new THREE.Vector3(10, 30, 10),

      //     new THREE.Vector3(0, 30, 10), new THREE.Vector3(-10, 20, 10), new THREE.Vector3(-10, 10, 10), new THREE.Vector3(0, 0, 10), new THREE.Vector3(10, -10, 10), new THREE.Vector3(20, -15, 10), new THREE.Vector3(30, -15, 10), new THREE.Vector3(40, -15, 10), new THREE.Vector3(50, -15, 10), new THREE.Vector3(60, 0, 10), new THREE.Vector3(70, 0, 0), new THREE.Vector3(80, 0, 0), new THREE.Vector3(90, 0, 0), new THREE.Vector3(100, 0, 0)]);

      var extrudePath = new THREE.HeartCurve(3.5);
      // var extrudePath = new THREE.VivianiCurve(70);
      // var extrudePath = new THREE.KnotCurve();
      // extrudePath = new THREE.HelixCurve();
    
      // var extrudePath = new THREE.ClosedSplineCurve3([
      //   new THREE.Vector3(0, -40, -40),
      //   new THREE.Vector3(0, 40, -40),
      //   new THREE.Vector3(0, 140, -40),
      //   new THREE.Vector3(0, 40, 40),
      //   new THREE.Vector3(0, -40, 40),
      // ]);
      

      var tube = new THREE.TubeGeometry(5, 100, 10, extrudePath, true);
      

      addGeometry(tube, 0xff00ff, 0, -80, 0, 0, 0, 0, 3);


      //
      renderer = new THREE.WebGLRenderer({
          antialias: true
      });
      renderer.setSize(window.innerWidth, window.innerHeight);

      container.appendChild(renderer.domElement);

      stats = new Stats();
      stats.domElement.style.position = 'absolute';
      stats.domElement.style.top = '0px';
      container.appendChild(stats.domElement);

      document.addEventListener('mousedown', onDocumentMouseDown, false);
      document.addEventListener('touchstart', onDocumentTouchStart, false);
      document.addEventListener('touchmove', onDocumentTouchMove, false);

    }

    //

    function onDocumentMouseDown(event) {

      event.preventDefault();

      document.addEventListener('mousemove', onDocumentMouseMove, false);
      document.addEventListener('mouseup', onDocumentMouseUp, false);
      document.addEventListener('mouseout', onDocumentMouseOut, false);

      mouseXOnMouseDown = event.clientX - windowHalfX;
      targetRotationOnMouseDown = targetRotation;

    }

    function onDocumentMouseMove(event) {

      mouseX = event.clientX - windowHalfX;

      targetRotation = targetRotationOnMouseDown + (mouseX - mouseXOnMouseDown) * 0.02;

    }

    function onDocumentMouseUp(event) {

      document.removeEventListener('mousemove', onDocumentMouseMove, false);
      document.removeEventListener('mouseup', onDocumentMouseUp, false);
      document.removeEventListener('mouseout', onDocumentMouseOut, false);

    }

    function onDocumentMouseOut(event) {

      document.removeEventListener('mousemove', onDocumentMouseMove, false);
      document.removeEventListener('mouseup', onDocumentMouseUp, false);
      document.removeEventListener('mouseout', onDocumentMouseOut, false);

    }

    function onDocumentTouchStart(event) {

      if (event.touches.length == 1) {

          event.preventDefault();

          mouseXOnMouseDown = event.touches[0].pageX - windowHalfX;
          targetRotationOnMouseDown = targetRotation;

      }

    }

    function onDocumentTouchMove(event) {

      if (event.touches.length == 1) {

          event.preventDefault();

          mouseX = event.touches[0].pageX - windowHalfX;
          targetRotation = targetRotationOnMouseDown + (mouseX - mouseXOnMouseDown) * 0.05;

      }

    }

    //

    function animate() {

      requestAnimationFrame(animate);

      render();
      stats.update();

    }

    function render() {


      parent.rotation.y += (targetRotation - parent.rotation.y) * 0.05;
      renderer.render(scene, camera);

    }</script>

  </body>
</html>