text: //This file is automatically rebuilt by the Cesium build process.
  define(function() {
      'use strict';
      return "uniform vec4 color;\n\
  uniform vec4 rimColor;\n\
  uniform float width;\n\
  \n\
  czm_material czm_getMaterial(czm_materialInput materialInput)\n\
  {\n\
      czm_material material = czm_getDefaultMaterial(materialInput);\n\
  \n\
      // See http://www.fundza.com/rman_shaders/surface/fake_rim/fake_rim1.html\n\
      float d = 1.0 - dot(materialInput.normalEC, normalize(materialInput.positionToEyeEC));\n\
      float s = smoothstep(1.0 - width, 1.0, d);\n\
  \n\
      vec4 outColor = czm_gammaCorrect(color);\n\
      vec4 outRimColor = czm_gammaCorrect(rimColor);\n\
  \n\
      material.diffuse = outColor.rgb;\n\
      material.emission = outRimColor.rgb * s;\n\
      material.alpha = mix(outColor.a, outRimColor.a, s);\n\
  \n\
      return material;\n\
  }\n\
  ";
  });