Function checkError

examples/OpenGLWindow/GLInstancingRenderer.cpp:185–192

//static GLfloat depthLightModelviewMatrix[16];

static void checkError(const char* functionName)
{
	GLenum error;
	while ((error = glGetError()) != GL_NO_ERROR)
	{
		fprintf(stderr, "GL error 0x%X detected in %s\n", error, functionName);
	}
}

extern int gShapeIndex;