diff options
Diffstat (limited to 'source/blender/blenlib/BLI_math_base.h')
-rw-r--r-- | source/blender/blenlib/BLI_math_base.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/source/blender/blenlib/BLI_math_base.h b/source/blender/blenlib/BLI_math_base.h index 94063c9a40a..aa4e697b48b 100644 --- a/source/blender/blenlib/BLI_math_base.h +++ b/source/blender/blenlib/BLI_math_base.h @@ -217,5 +217,26 @@ extern double round(double x); double double_round(double x, int ndigits); -#endif /* __BLI_MATH_BASE_H__ */ +/* asserts, some math functions expect normalized inputs + * check the vector is unit length, or zero length (which can't be helped in some cases). + */ +#ifdef DEBUG +/* note: 0.0001 is too small becaues normals may be converted from short's: see [#34322] */ +# define BLI_ASSERT_UNIT_EPSILON 0.0002f +# define BLI_ASSERT_UNIT_V3(v) { \ + const float _test_unit = len_squared_v3(v); \ + BLI_assert((fabsf(_test_unit - 1.0f) < BLI_ASSERT_UNIT_EPSILON) || \ + (fabsf(_test_unit) < BLI_ASSERT_UNIT_EPSILON)); \ +} (void)0 + +# define BLI_ASSERT_UNIT_V2(v) { \ + const float _test_unit = len_squared_v2(v); \ + BLI_assert((fabsf(_test_unit - 1.0f) < BLI_ASSERT_UNIT_EPSILON) || \ + (fabsf(_test_unit) < BLI_ASSERT_UNIT_EPSILON)); \ +} (void)0 +#else +# define BLI_ASSERT_UNIT_V2(v) (void)0 +# define BLI_ASSERT_UNIT_V3(v) (void)0 +#endif +#endif /* __BLI_MATH_BASE_H__ */ |