text: //This file is automatically rebuilt by the Cesium build process.
  define(function() {
      'use strict';
      return "attribute vec4 position;\n\
  \n\
  varying vec4 positionEC;\n\
  \n\
  void main()\n\
  {\n\
      positionEC = czm_modelView * position;\n\
      gl_Position = czm_projection * positionEC;\n\
  \n\
      czm_vertexLogDepth();\n\
  }\n\
  ";
  });