diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_geom.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 30 |
1 files changed, 9 insertions, 21 deletions
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index 45e8c425f64..c2e4799d7cb 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -2133,32 +2133,20 @@ void fill_poly_v2i_n( * \param r_mat The matrix to return. * \param normal A unit length vector. */ -bool axis_dominant_v3_to_m3(float r_mat[3][3], const float normal[3]) +void axis_dominant_v3_to_m3(float r_mat[3][3], const float normal[3]) { - float up[3] = {0.0f, 0.0f, 1.0f}; - float axis[3]; - float angle; - - /* double check they are normalized */ BLI_ASSERT_UNIT_V3(normal); - cross_v3_v3v3(axis, normal, up); - angle = saacos(dot_v3v3(normal, up)); + copy_v3_v3(r_mat[2], normal); + ortho_basis_v3v3_v3(r_mat[0], r_mat[1], r_mat[2]); - if (angle >= FLT_EPSILON) { - if (len_squared_v3(axis) < FLT_EPSILON) { - axis[0] = 0.0f; - axis[1] = 1.0f; - axis[2] = 0.0f; - } + BLI_ASSERT_UNIT_V3(r_mat[0]); + BLI_ASSERT_UNIT_V3(r_mat[1]); - axis_angle_to_mat3(r_mat, axis, angle); - return true; - } - else { - unit_m3(r_mat); - return false; - } + transpose_m3(r_mat); + + BLI_assert(!is_negative_m3(r_mat)); + BLI_assert(fabsf(dot_m3_v3_row_z(r_mat, normal) - 1.0f) < BLI_ASSERT_UNIT_EPSILON); } /****************************** Interpolation ********************************/ |