irrlicht/source/Irrlicht/burning_shader_compile_verify.h

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// apply global override
#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
#undef INVERSE_W
#endif
#ifndef SOFTWARE_DRIVER_2_SUBTEXEL
#undef SUBTEXEL
#endif
#if BURNING_MATERIAL_MAX_COLORS < 1
#undef IPOL_C0
#undef IPOL_A0
#endif
#if BURNING_MATERIAL_MAX_LIGHT_TANGENT < 1
#undef IPOL_L0
#endif
// 1/x * FIX_POINT
#if !defined(INVERSE_W_RANGE)
#define INVERSE_W_RANGE FIX_POINT_F32_MUL
#endif
#if defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) || defined ( SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT )
#else
#ifdef IPOL_W
#undef IPOL_W
#define IPOL_Z
#endif
#ifdef CMP_W
#undef CMP_W
#define CMP_Z
#endif
#ifdef WRITE_W
#undef WRITE_W
#define WRITE_Z
#endif
#endif