+#if 0\r
+#define glError() { \\r
+ GLenum err = glGetError(); \\r
+ while (err != GL_NO_ERROR) { \\r
+ printf("glError: %d caught at %s:%u\n", err, __FILE__, __LINE__); \\r
+ err = glGetError(); \\r
+ } \\r
+}\r
+#else\r
+#define glError() \r
+#endif\r
+\r