std::ostringstream vertexShaderStringStream;
vertexShaderStringStream << "#define NUMBER_OF_DIMPLE "<< numberOfDimples << "\n";
std::string vertexShader(
+ "precision highp float;\n"
"uniform vec2 uCenter[ NUMBER_OF_DIMPLE ];\n"
"uniform float uRadius[ NUMBER_OF_DIMPLE ]; \n"
"uniform float uPercentage[ NUMBER_OF_DIMPLE ]; \n"