Question

我正在寻找一种方法来创建一个全球图表，其中我有一个虚线世界和条形图显示某个区域的强度。

我通过使用世界人口数据（from globe site）并将所有点数量设置为0来实现这一点。但是从图像中可以看到一些点缺失（俄罗斯北部，撒哈拉等等）。

有没有更好的方法来达到预期的效果？

或者我在哪里可以找到带有完整点的数据集（我随处可见）？

我尽力将代码组合在一起：

＆＃13;

var DAT = DAT || {};

DAT.Globe = function(container, colorFn) {

  colorFn = colorFn || function(x) {
    var c = new THREE.Color();
    c.setHSV((0.6 - (x * 0.5)), 1.0, 1.0);
    return c;
  };

  var Shaders = {
    'earth': {
      uniforms: {
        'texture': {
          type: 't',
          value: 0,
          texture: null
        }
      },
      vertexShader: [
        'varying vec3 vNormal;',
        'varying vec2 vUv;',
        'void main() {',
        'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 0 );',
        'vNormal = normalize( normalMatrix * normal );',
        'vUv = uv;',
        '}'
      ].join('\n'),
      fragmentShader: [
        'uniform sampler2D texture;',
        'varying vec3 vNormal;',
        'varying vec2 vUv;',
        'void main() {',
        'vec3 diffuse = texture2D( texture, vUv ).xyz;',
        'float intensity = 1.05 - dot( vNormal, vec3( 0.0, 0.0, 1.0 ) );',
        'vec3 atmosphere = vec3( 1.0, 1.0, 1.0 ) * pow( intensity, 1.0 );',
        'gl_FragColor = vec4( diffuse + atmosphere, 1.0 );',
        '}'
      ].join('\n')
    },
    'atmosphere': {
      uniforms: {},
      vertexShader: [
        'varying vec3 vNormal;',
        'void main() {',
        'vNormal = normalize( normalMatrix * normal );',
        'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
        '}'
      ].join('\n'),
      fragmentShader: [
        'varying vec3 vNormal;',
        'void main() {',
        'float intensity = pow( 0.8 - dot( vNormal, vec3( 0, 0, 1.0 ) ), 12.0 );',
        'gl_FragColor = vec4( 0.0, 0.0, 0.0, 0.0 );',
        '}'
      ].join('\n')
    }
  };



  var camera, scene, sceneAtmosphere, renderer, w, h;
  var vector, mesh, atmosphere, point;

  var overRenderer;

  var imgDir = 'https://globe.chromeexperiments.com/world.jpg';

  var curZoomSpeed = 0;
  var zoomSpeed = 50;

  var mouse = {
      x: 0,
      y: 0
    },
    mouseOnDown = {
      x: 0,
      y: 0
    };
  var rotation = {
      x: 0,
      y: 0
    },
    target = {
      x: Math.PI * 3 / 2,
      y: Math.PI / 6.0
    },
    targetOnDown = {
      x: 0,
      y: 0
    };

  var distance = 100000,
    distanceTarget = 100000;
  var padding = 40;
  var PI_HALF = Math.PI / 2;

  function init() {
    var shader, uniforms, material;
    w = container.offsetWidth || window.innerWidth * 0.85;
    h = container.offsetHeight || window.innerHeight * 0.85;

    camera = new THREE.Camera(
      30, w / h, 1, 10000);
    camera.position.z = distance;

    vector = new THREE.Vector3();

    scene = new THREE.Scene();
    sceneAtmosphere = new THREE.Scene();

    var geometry = new THREE.Sphere(200, 40, 30);

    shader = Shaders['earth'];
    uniforms = THREE.UniformsUtils.clone(shader.uniforms);

    uniforms['texture'].texture = THREE.ImageUtils.loadTexture(imgDir);

    material = new THREE.MeshShaderMaterial({

      uniforms: uniforms,
      vertexShader: shader.vertexShader,
      fragmentShader: shader.fragmentShader

    });

    mesh = new THREE.Mesh(geometry, material);
    mesh.matrixAutoUpdate = false;
    scene.addObject(mesh);

    shader = Shaders['atmosphere'];
    uniforms = THREE.UniformsUtils.clone(shader.uniforms);

    material = new THREE.MeshShaderMaterial({

      uniforms: uniforms,
      vertexShader: shader.vertexShader,
      fragmentShader: shader.fragmentShader

    });

    mesh = new THREE.Mesh(geometry, material);
    mesh.scale.x = mesh.scale.y = mesh.scale.z = 1.1;
    mesh.flipSided = true;
    mesh.matrixAutoUpdate = false;
    mesh.updateMatrix();
    sceneAtmosphere.addObject(mesh);

    geometry = new THREE.Cube(0.75, 0.75, 1, 1, 1, 1, null, false, {
      px: true,
      nx: true,
      py: true,
      ny: true,
      pz: false,
      nz: true
    });

    for (var i = 0; i < geometry.vertices.length; i++) {

      var vertex = geometry.vertices[i];
      vertex.position.z += 0.5;

    }

    point = new THREE.Mesh(geometry);

    renderer = new THREE.WebGLRenderer({
      antialias: true
    });
    renderer.autoClear = false;
    renderer.setClearColorHex(0x000000, 0.0);
    renderer.setSize(w, h);

    renderer.domElement.style.position = 'absolute';

    container.appendChild(renderer.domElement);

    container.addEventListener('mousedown', onMouseDown, false);

    container.addEventListener('mousewheel', onMouseWheel, false);

    document.addEventListener('keydown', onDocumentKeyDown, false);

    window.addEventListener('resize', onWindowResize, false);

    container.addEventListener('mouseover', function() {
      overRenderer = true;
    }, false);

    container.addEventListener('mouseout', function() {
      overRenderer = false;
    }, false);
  }

  addData = function(data, opts) {
    var lat, lng, size, color, i, step, colorFnWrapper;

    opts.animated = opts.animated || false;
    this.is_animated = opts.animated;
    opts.format = opts.format || 'magnitude'; // other option is 'legend'
    console.log(opts.format);
    if (opts.format === 'magnitude') {
      step = 3;
      colorFnWrapper = function(data, i) {
        return colorFn(data[i + 2]);
      }
    } else if (opts.format === 'legend') {
      step = 4;
      colorFnWrapper = function(data, i) {
        return colorFn(data[i + 3]);
      }
    } else {
      throw ('error: format not supported: ' + opts.format);
    }

    if (opts.animated) {
      if (this._baseGeometry === undefined) {
        this._baseGeometry = new THREE.Geometry();
        for (i = 0; i < data.length; i += step) {
          lat = data[i];
          lng = data[i + 1];
          //        size = data[i + 2];
          color = colorFnWrapper(data, i);
          size = 0;
          addPoint(lat, lng, size, color, this._baseGeometry);
        }
      }
      if (this._morphTargetId === undefined) {
        this._morphTargetId = 0;
      } else {
        this._morphTargetId += 1;
      }
      opts.name = opts.name || 'morphTarget' + this._morphTargetId;
    }
    var subgeo = new THREE.Geometry();
    for (i = 0; i < data.length; i += step) {
      lat = data[i];
      lng = data[i + 1];
      color = colorFnWrapper(data, i);
      size = data[i + 2];
      size = size * 200;
      addPoint(lat, lng, size, color, subgeo);
    }
    if (opts.animated) {
      this._baseGeometry.morphTargets.push({
        'name': opts.name,
        vertices: subgeo.vertices
      });
    } else {
      this._baseGeometry = subgeo;
    }

  };

  function createPoints() {
    if (this._baseGeometry !== undefined) {
      if (this.is_animated === false) {
        this.points = new THREE.Mesh(this._baseGeometry, new THREE.MeshBasicMaterial({
          color: 0xffffff,
          vertexColors: THREE.FaceColors,
          morphTargets: false
        }));
      } else {
        if (this._baseGeometry.morphTargets.length < 8) {
          console.log('t l', this._baseGeometry.morphTargets.length);
          var padding = 8 - this._baseGeometry.morphTargets.length;
          console.log('padding', padding);
          for (var i = 0; i <= padding; i++) {
            console.log('padding', i);
            this._baseGeometry.morphTargets.push({
              'name': 'morphPadding' + i,
              vertices: this._baseGeometry.vertices
            });
          }
        }
        this.points = new THREE.Mesh(this._baseGeometry, new THREE.MeshBasicMaterial({
          color: 0xffffff,
          vertexColors: THREE.FaceColors,
          morphTargets: true
        }));
      }
      scene.addObject(this.points);
    }
  }

  function addPoint(lat, lng, size, color, subgeo) {
    var phi = (90 - lat) * Math.PI / 180;
    var theta = (180 - lng) * Math.PI / 180;

    point.position.x = 200 * Math.sin(phi) * Math.cos(theta);
    point.position.y = 200 * Math.cos(phi);
    point.position.z = 200 * Math.sin(phi) * Math.sin(theta);

    point.lookAt(mesh.position);

    point.scale.z = -size;
    point.updateMatrix();

    var i;
    for (i = 0; i < point.geometry.faces.length; i++) {

      point.geometry.faces[i].color = color;

    }

    GeometryUtils.merge(subgeo, point);
  }

  function onMouseDown(event) {
    event.preventDefault();

    container.addEventListener('mousemove', onMouseMove, false);
    container.addEventListener('mouseup', onMouseUp, false);
    container.addEventListener('mouseout', onMouseOut, false);

    mouseOnDown.x = -event.clientX;
    mouseOnDown.y = event.clientY;

    targetOnDown.x = target.x;
    targetOnDown.y = target.y;

    container.style.cursor = 'move';
  }

  function onMouseMove(event) {
    mouse.x = -event.clientX;
    mouse.y = event.clientY;

    var zoomDamp = distance / 1000;

    target.x = targetOnDown.x + (mouse.x - mouseOnDown.x) * 0.005 * zoomDamp;
    target.y = targetOnDown.y + (mouse.y - mouseOnDown.y) * 0.005 * zoomDamp;

    target.y = target.y > PI_HALF ? PI_HALF : target.y;
    target.y = target.y < -PI_HALF ? -PI_HALF : target.y;
  }

  function onMouseUp(event) {
    container.removeEventListener('mousemove', onMouseMove, false);
    container.removeEventListener('mouseup', onMouseUp, false);
    container.removeEventListener('mouseout', onMouseOut, false);
    container.style.cursor = 'auto';
  }

  function onMouseOut(event) {
    container.removeEventListener('mousemove', onMouseMove, false);
    container.removeEventListener('mouseup', onMouseUp, false);
    container.removeEventListener('mouseout', onMouseOut, false);
  }

  function onMouseWheel(event) {
    event.preventDefault();
    if (overRenderer) {
      zoom(event.wheelDeltaY * 0.3);
    }
    return false;
  }

  function onDocumentKeyDown(event) {
    switch (event.keyCode) {
      case 38:
        zoom(100);
        event.preventDefault();
        break;
      case 40:
        zoom(-100);
        event.preventDefault();
        break;
    }
  }

  function onWindowResize(event) {
    console.log('resize');
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth * 0.85, window.innerHeight * 0.85);
  }

  function zoom(delta) {
    distanceTarget -= delta;
    distanceTarget = distanceTarget > 1000 ? 1000 : distanceTarget;
    distanceTarget = distanceTarget < 350 ? 350 : distanceTarget;
  }

  function animate() {
    requestAnimationFrame(animate);
    render();
  }

  function render() {
    zoom(curZoomSpeed);

    rotation.x += (target.x - rotation.x) * 0.1;
    rotation.y += (target.y - rotation.y) * 0.1;
    distance += (distanceTarget - distance) * 0.3;

    camera.position.x = distance * Math.sin(rotation.x) * Math.cos(rotation.y);
    camera.position.y = distance * Math.sin(rotation.y);
    camera.position.z = distance * Math.cos(rotation.x) * Math.cos(rotation.y);

    vector.copy(camera.position);

    renderer.clear();
    renderer.render(scene, camera);
    renderer.render(sceneAtmosphere, camera);
  }

  init();
  this.animate = animate;


  this.__defineGetter__('time', function() {
    return this._time || 0;
  });

  this.__defineSetter__('time', function(t) {
    var validMorphs = [];
    var morphDict = this.points.morphTargetDictionary;
    for (var k in morphDict) {
      if (k.indexOf('morphPadding') < 0) {
        validMorphs.push(morphDict[k]);
      }
    }
    validMorphs.sort();
    var l = validMorphs.length - 1;
    var scaledt = t * l + 1;
    var index = Math.floor(scaledt);
    for (i = 0; i < validMorphs.length; i++) {
      this.points.morphTargetInfluences[validMorphs[i]] = 0;
    }
    var lastIndex = index - 1;
    var leftover = scaledt - index;
    if (lastIndex >= 0) {
      this.points.morphTargetInfluences[lastIndex] = 1 - leftover;
    }
    this.points.morphTargetInfluences[index] = leftover;
    this._time = t;
  });

  this.addData = addData;
  this.createPoints = createPoints;
  this.renderer = renderer;
  this.scene = scene;

  return this;

};

/// HERE I INIT THE GLOBE

// Where to put the globe?
var container = document.getElementById( 'container' );

// Make the globe
var globe = DAT.Globe(container);

// We're going to ask a file for the JSON data.
var xhr = new XMLHttpRequest();
// Where do we get the data?
xhr.open( 'GET', 'https://gist.githubusercontent.com/ilicmarko/6f1781bfc3f72ec52b658d93b7fe8353/raw/90dadfdf3087c278d669c6e1a2411aef70503000/world-population-data-zeroed', true );

// What do we do when we have it?
xhr.onreadystatechange = function() {

    // If we've received the data
    if ( xhr.readyState === 4 && xhr.status === 200 ) {

        // Parse the JSON
        var data = JSON.parse( xhr.responseText );

        // Tell the globe about your JSON data
        for ( var i = 0; i < data.length; i ++ ) {
            globe.addData( data[i][1], {format: 'magnitude', name: data[i][0]} );
        }

        // Create the geometry
        globe.createPoints();

        // Begin animation
        globe.animate();

    }

};

// Begin request
xhr.send( null );

＆＃13;

body {
  background-color: #222;
}

＆＃13;

<script type="text/javascript" src="https://globe.chromeexperiments.com/third-party/Three/ThreeWebGL.js"></script>
  <script type="text/javascript" src="https://globe.chromeexperiments.com/third-party/Three/ThreeExtras.js"></script>
  <script type="text/javascript" src="https://globe.chromeexperiments.com/third-party/Three/RequestAnimationFrame.js"></script>
  <script type="text/javascript" src="https://globe.chromeexperiments.com/third-party/Three/Detector.js"></script>
  
<div id="container" class="globe"></div>

＆＃13;

虚线的世界图形图

0 个答案: