const char *linestrip_fs =
  "#version 400\n"
  "precision highp float; \n"
  "\n"
  "in vec4 outColor;\n"
  "\n"
  "out vec4 colorOut;\n"
  "\n"
  "\n"
  "void main()\n"
  "{\n"
  "  colorOut = outColor;\n"
  "}\n"
  "\n";
