OpenSource
/
dc-sdk
peilaus alkaen https://github.com/dvt3d/dc-sdk


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1.0">
  <title>dc-example</title>
  <script src='/libs/dc-sdk/dc.base.min.js'></script>
  <script src='/libs/dc-sdk/dc.core.min.js'></script>
  <script>DC.baseUrl='../libs/dc-sdk/resources/'</script>
  <link href='/libs/dc-sdk/dc.core.min.css' type='text/css' rel='stylesheet'>
  <link href='../index.css' type='text/css' rel='stylesheet'>
  <style>
    *{
      margin: 0;
      padding: 0;
    }
    html,body,#viewer-container{
      width: 100%;
      height: 100%;
      overflow: hidden;
    }
  </style>
</head>

<body>

<div id="viewer-container"></div>
<script>
  let viewer = undefined

  function initViewer() {
    viewer = new DC.Viewer('viewer-container')
    let baselayer = DC.ImageryLayerFactory.createAmapImageryLayer()
    baselayer.defaultBrightness = 0.1
    viewer.addBaseLayer(baselayer)
    let layer = new DC.TilesetLayer('layer')
    viewer.addLayer(layer)
    let build = new DC.Tileset(
      'http://resource.dvgis.cn/data/3dtiles/ljz/tileset.json',
      {skipLevels:true}
    )
    let customShader =  new DC.CustomShader({
      fragmentShaderText:`
      void fragmentMain(FragmentInput fsInput, inout czm_modelMaterial material) {
         vec4 position = czm_inverseModelView * vec4(fsInput.attributes.positionEC,1); // 位置
         float glowRange = 100.0; // 光环的移动范围(高度)
         vec4 temp = vec4(0.2,  0.5, 1.0, 1.0); // 颜色
         temp *= vec4(vec3(position.z / 100.0), 1.0);  // 渐变
         // 动态光环
         float time = fract(czm_frameNumber / 360.0);
         time = abs(time - 0.5) * 2.0;
         float diff = step(0.005, abs( clamp(position.z / glowRange, 0.0, 1.0) - time));
         material.diffuse = vec3(temp.rgb + temp.rgb * (1.0 - diff)) ;
       }
      `
    })
    build.setCustomShader(customShader)
    layer.addOverlay(build)
    viewer.flyTo(build)
  }
  DC.ready(initViewer)
</script>
</body>
</html>