javascript
/
three.js
espejo de https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - extrude shapes from geodata</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>
'use strict';
</script>


<script type="text/javascript" src="../build/three.js"></script>


<script>
// From d3-threeD.js
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

function d3threeD(exports) {

const DEGS_TO_RADS = Math.PI / 180,
      UNIT_SIZE = 100;

const DIGIT_0 = 48, DIGIT_9 = 57, COMMA = 44, SPACE = 32, PERIOD = 46,
      MINUS = 45;
exports.transformSVGPath =
function transformSVGPath(pathStr) {
  var path = new THREE.Shape();

  var idx = 1, len = pathStr.length, activeCmd,
      x = 0, y = 0, nx = 0, ny = 0, firstX = null, firstY = null,
      x1 = 0, x2 = 0, y1 = 0, y2 = 0,
      rx = 0, ry = 0, xar = 0, laf = 0, sf = 0, cx, cy;

  function eatNum() {
    var sidx, c, isFloat = false, s;
    // eat delims
    while (idx < len) {
      c = pathStr.charCodeAt(idx);
      if (c !== COMMA && c !== SPACE)
        break;
      idx++;
    }
    if (c === MINUS)
      sidx = idx++;
    else
      sidx = idx;
    // eat number
    while (idx < len) {
      c = pathStr.charCodeAt(idx);
      if (DIGIT_0 <= c && c <= DIGIT_9) {
        idx++;
        continue;
      }
      else if (c === PERIOD) {
        idx++;
        isFloat = true;
        continue;
      }

      s = pathStr.substring(sidx, idx);
      return isFloat ? parseFloat(s) : parseInt(s);
    }

    s = pathStr.substring(sidx);
    return isFloat ? parseFloat(s) : parseInt(s);
  }

  function nextIsNum() {
    var c;
    // do permanently eat any delims...
    while (idx < len) {
      c = pathStr.charCodeAt(idx);
      if (c !== COMMA && c !== SPACE)
        break;
      idx++;
    }
    c = pathStr.charCodeAt(idx);
    return (c === MINUS || (DIGIT_0 <= c && c <= DIGIT_9));
  }

  var canRepeat;
  activeCmd = pathStr[0];
  while (idx <= len) {
    canRepeat = true;
    switch (activeCmd) {
      // moveto commands, become lineto's if repeated
      case 'M':
        x = eatNum();
        y = eatNum();
        path.moveTo(x, y);
        activeCmd = 'L';
      firstX = x;
      firstY = y;
        break;
      case 'm':
        x += eatNum();
        y += eatNum();
        path.moveTo(x, y);
        activeCmd = 'l';
      firstX = x;
      firstY = y;
        break;
      case 'Z':
      case 'z':
        canRepeat = false;
        if (x !== firstX || y !== firstY)
          path.lineTo(firstX, firstY);
        break;
      // - lines!
      case 'L':
      case 'H':
      case 'V':
        nx = (activeCmd === 'V') ? x : eatNum();
        ny = (activeCmd === 'H') ? y : eatNum();
        path.lineTo(nx, ny);
        x = nx;
        y = ny;
        break;
      case 'l':
      case 'h':
      case 'v':
        nx = (activeCmd === 'v') ? x : (x + eatNum());
        ny = (activeCmd === 'h') ? y : (y + eatNum());
        path.lineTo(nx, ny);
        x = nx;
        y = ny;
        break;
      // - cubic bezier
      case 'C':
        x1 = eatNum(); y1 = eatNum();
      case 'S':
        if (activeCmd === 'S') {
          x1 = 2 * x - x2; y1 = 2 * y - y2;
        }
        x2 = eatNum();
        y2 = eatNum();
        nx = eatNum();
        ny = eatNum();
        path.bezierCurveTo(x1, y1, x2, y2, nx, ny);
        x = nx; y = ny;
        break;
      case 'c':
        x1 = x + eatNum();
        y1 = y + eatNum();
      case 's':
        if (activeCmd === 's') {
          x1 = 2 * x - x2;
          y1 = 2 * y - y2;
        }
        x2 = x + eatNum();
        y2 = y + eatNum();
        nx = x + eatNum();
        ny = y + eatNum();
        path.bezierCurveTo(x1, y1, x2, y2, nx, ny);
        x = nx; y = ny;
        break;
      // - quadratic bezier
      case 'Q':
        x1 = eatNum(); y1 = eatNum();
      case 'T':
        if (activeCmd === 'T') {
          x1 = 2 * x - x1;
          y1 = 2 * y - y1;
        }
        nx = eatNum();
        ny = eatNum();
        path.quadraticCurveTo(x1, y1, nx, ny);
        x = nx;
        y = ny;
        break;
      case 'q':
        x1 = x + eatNum();
        y1 = y + eatNum();
      case 't':
        if (activeCmd === 't') {
          x1 = 2 * x - x1;
          y1 = 2 * y - y1;
        }
        nx = x + eatNum();
        ny = y + eatNum();
        path.quadraticCurveTo(x1, y1, nx, ny);
        x = nx; y = ny;
        break;
      // - elliptical arc
      case 'A':
        rx = eatNum();
        ry = eatNum();
        xar = eatNum() * DEGS_TO_RADS;
        laf = eatNum();
        sf = eatNum();
        nx = eatNum();
        ny = eatNum();
        if (rx !== ry) {
          console.warn("Forcing elliptical arc to be a circular one :(",
                       rx, ry);
        }
        // SVG implementation notes does all the math for us! woo!
        // http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
        // step1, using x1 as x1'
        x1 = Math.cos(xar) * (x - nx) / 2 + Math.sin(xar) * (y - ny) / 2;
        y1 = -Math.sin(xar) * (x - nx) / 2 + Math.cos(xar) * (y - ny) / 2;
        // step 2, using x2 as cx'
        var norm = Math.sqrt(
                     (rx*rx * ry*ry - rx*rx * y1*y1 - ry*ry * x1*x1) /
                     (rx*rx * y1*y1 + ry*ry * x1*x1));
        if (laf === sf)
          norm = -norm;
        x2 = norm * rx * y1 / ry;
        y2 = norm * -ry * x1 / rx;
        // step 3
        cx = Math.cos(xar) * x2 - Math.sin(xar) * y2 + (x + nx) / 2;
        cy = Math.sin(xar) * x2 + Math.cos(xar) * y2 + (y + ny) / 2;

        var u = new THREE.Vector2(1, 0),
            v = new THREE.Vector2((x1 - x2) / rx,
                                  (y1 - y2) / ry);
        var startAng = Math.acos(u.dot(v) / u.length() / v.length());
        if (u.x * v.y - u.y * v.x < 0)
          startAng = -startAng;

        // we can reuse 'v' from start angle as our 'u' for delta angle
        u.x = (-x1 - x2) / rx;
        u.y = (-y1 - y2) / ry;

        var deltaAng = Math.acos(v.dot(u) / v.length() / u.length());
        // This normalization ends up making our curves fail to triangulate...
        if (v.x * u.y - v.y * u.x < 0)
          deltaAng = -deltaAng;
        if (!sf && deltaAng > 0)
          deltaAng -= Math.PI * 2;
        if (sf && deltaAng < 0)
          deltaAng += Math.PI * 2;

        path.absarc(cx, cy, rx, startAng, startAng + deltaAng, sf);
        x = nx;
        y = ny;
        break;
      default:
        throw new Error("weird path command: " + activeCmd);
    }
    // just reissue the command
    if (canRepeat && nextIsNum())
      continue;
    activeCmd = pathStr[idx++];
  }

  return path;
}
}

var $d3g = {};
d3threeD($d3g);
</script>


<script>
/// Graphic Engine and Geo Data Init Functions

var addGeoObject = function( group, svgObject ) {
    var i,j, len, len1;
    var path, mesh, color, material, amount, simpleShapes, simpleShape, shape3d, x, toAdd, results = [];
    var thePaths = svgObject.paths;
    var theAmounts = svgObject.amounts;
    var theColors = svgObject.colors;
    var theCenter = svgObject.center;

    len = thePaths.length;
    for (i = 0; i < len; ++i) {
        path = $d3g.transformSVGPath( thePaths[i] );
        color = new THREE.Color( theColors[i] ); 
        material = new THREE.MeshLambertMaterial({
            color: color,
            ambient: color,
            emissive: color,
        });
        amount = theAmounts[i];
        simpleShapes = path.toShapes(true);
        len1 = simpleShapes.length;
        for (j = 0; j < len1; ++j) {
            simpleShape = simpleShapes[j];
            shape3d = simpleShape.extrude({
                amount: amount,
                bevelEnabled: false
            });
            mesh = new THREE.Mesh(shape3d, material);
            mesh.rotation.x = Math.PI;
            mesh.translateZ( - amount - 1);
            mesh.translateX( - theCenter.x);
            mesh.translateY( - theCenter.y);
            group.add(mesh);
        }
    }
};

var init3d = function(){
    var near = 1.0;
    var far = 10000.0;

    /// Global : renderer
    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setClearColor( 0xb0b0b0 );
    renderer.setSize( window.innerWidth, window.innerHeight );

    /// Global : scene
    scene = new THREE.Scene();

    /// Global : camera
    camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, near, far );
    camera.position.set( 0, 0, 200 );

    /// Global : group
    group = new THREE.Object3D();
    group.position.x = 0.0;
    group.position.y = 0.0;
    group.position.z = 0.0;
    scene.add( group );

    /// direct light
    var light = new THREE.DirectionalLight( 0x404040 );
    light.position.set( 0.75, 0.75, 1.0 ).normalize();
    scene.add( light );

    /// ambient light
    var ambientLight = new THREE.AmbientLight(0x404040);
    scene.add( ambientLight );

    /// backgroup grids
    var plane = new THREE.Mesh(
            new THREE.PlaneGeometry(160, 160, 20, 20), 
            new THREE.MeshBasicMaterial({ color: 0x7f7f7f, wireframe: true }));
    plane.rotation.x = Math.PI;
    group.add( plane );

    var obj = initSVGObject();
    addGeoObject( group, obj );
};

var initSVGObject = function() {
    var obj = {};

    /// The geo data from Taipei City, Keelung City, Taipei County in SVG form
    obj.paths = [
        /// Taipei City
        "M366.2182,108.9780 L368.0329,110.3682 L367.5922,112.4411 L369.9258,116.0311 L368.9827,117.3543 " +
        "L371.5686,119.8491 L370.5599,121.7206 L372.9314,124.8009 L368.8889,126.7603 L369.2695,130.7622 " +
        "L366.1499,130.3388 L363.4698,128.1161 L362.9256,125.6018 L360.8153,126.4025 L360.2968,124.3588 " +
        "L361.9519,121.1623 L360.4475,118.7162 L358.1163,117.8678 L358.7094,115.7577 L361.6243,112.4576 Z",
        /// Keelung City
        "M380.2689,113.3850 L383.5604,114.2370 L383.7404,114.2386 L385.4082,115.6247 L384.9725,117.4631 " +
        "L381.6681,117.9439 L383.0209,121.0914 L379.4649,122.7061 L373.4987,118.8487 L372.0980,114.7589 " +
        "L377.9716,112.0707 Z",
        /// Taipei County
        "M359.4486,155.6690 L357.0422,152.7420 L355.1688,148.0173 L357.1186,145.8045 L354.1323,141.2242 " +
        "L351.1807,141.6609 L348.9387,140.5372 L349.5415,137.8396 L347.5174,136.1694 L347.6299,129.2327 " +
        "L351.4192,128.8067 L354.2518,125.3113 L352.5805,121.8038 L349.3190,120.9429 L344.3277,116.7676 " +
        "L350.9772,115.1221 L354.5759,112.5371 L354.5667,110.6949 L357.4098,105.7489 L362.3963,101.8443 " +
        "L364.4415,101.0819 L364.5314,101.0828 L364.6209,101.1230 L364.7698,101.2029 L368.1221,101.5115 " +
        "L371.7216,104.1338 L372.2958,106.7261 L375.5949,109.6971 L377.0415,108.8875 L377.0737,108.6526 " +
        "L377.4037,108.6165 L376.8840,109.7091 L376.7323,109.9037 L377.9416,112.0705 L371.7970,114.8736 " + 
        "L374.0935,119.4031 L380.7848,122.7963 L382.6529,121.9897 L381.5792,117.8256 L385.0339,117.3069 " +
        "L385.4082,115.6247 L388.7014,116.3969 L389.8697,116.6024 L390.0206,116.4860 L391.0396,116.6118 " +
        "L394.6665,116.9929 L394.4694,119.2255 L394.3172,119.4987 L395.3792,121.8977 L395.2728,124.0526 " +
        "L397.2123,125.6350 L401.1709,126.2516 L401.2612,126.2130 L401.4086,126.6060 L400.1992,127.7733 " +
        "L399.7769,128.0446 L399.6247,128.3179 L398.1779,129.0521 L394.2418,129.2969 L388.7324,130.9385 " +
        "L389.2782,134.0003 L383.7237,137.0111 L381.7445,139.9336 L379.7001,139.9546 L376.1539,143.0580 " +
        "L371.3022,144.1094 L368.6009,146.5914 L368.7361,151.1399 L363.6153,154.4980 " +
        /// Taipei County hole.
        "M363.4600,128.3904 L366.6300,130.3829 L369.3732,129.3913 L369.5603,125.6695 L374.3989,125.1677 " +
        "L370.8412,123.6440 L371.0684,118.8252 L369.0431,117.3157 L369.6882,115.7936 L367.8578,112.8749 " +
        "L368.1217,110.4867 L366.5152,109.2554 L361.9554,112.3435 L358.1163,117.8678 L361.7218,120.2192 " +
        "L360.7261,126.3232 L362.8064,125.5221 Z"];

    obj.amounts = [ 19, 20, 21 ];
    obj.colors =  [ 0xC07000, 0xC08000, 0xC0A000 ];
    obj.center = { x:365, y:125 };

    return obj;
};
</script>


<script>
    /// Events from extrude shapes example

    function onWindowResize() {

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

        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();

        renderer.setSize( window.innerWidth, window.innerHeight );
    };

    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() {

        /// compatibility : http://caniuse.com/requestanimationframe
        requestAnimationFrame( animate );

        render();
    };

    function render() {

        group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
        renderer.render( scene, camera );
    };
</script>


<script>
    /// Main

    var renderer;
    var scene, camera, group;

    var targetRotation = 0;
    var targetRotationOnMouseDown = 0;

    var mouseX = 0;
    var mouseXOnMouseDown = 0;

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

    var 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 = 'Shapes Extrusion via Geo Data<br/>Drag to spin';
    container.appendChild( info );

    init3d();

	container.appendChild( renderer.domElement );
    document.addEventListener( 'mousedown', onDocumentMouseDown, false );
    document.addEventListener( 'touchstart', onDocumentTouchStart, false );
    document.addEventListener( 'touchmove', onDocumentTouchMove, false );
    window.addEventListener( 'resize', onWindowResize, false );

    animate();
</script>


</body>
</html>