diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_matrix.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_matrix.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c index 76b986d7346..b3b58dca1a6 100644 --- a/source/blender/blenlib/intern/math_matrix.c +++ b/source/blender/blenlib/intern/math_matrix.c @@ -866,6 +866,35 @@ int is_orthonormal_m4(float m[][4]) return 0; } +int is_uniform_scaled_m3(float m[][3]) +{ + const float eps = 1e-7; + float t[3][3]; + float l1, l2, l3, l4, l5, l6; + + copy_m3_m3(t, m); + transpose_m3(t); + + l1 = len_squared_v3(m[0]); + l2 = len_squared_v3(m[1]); + l3 = len_squared_v3(m[2]); + + l4 = len_squared_v3(t[0]); + l5 = len_squared_v3(t[1]); + l6 = len_squared_v3(t[2]); + + if (fabsf(l2 - l1) <= eps && + fabsf(l3 - l1) <= eps && + fabsf(l4 - l1) <= eps && + fabsf(l5 - l1) <= eps && + fabsf(l6 - l1) <= eps) + { + return 1; + } + + return 0; +} + void normalize_m3(float mat[][3]) { normalize_v3(mat[0]); @@ -1674,8 +1703,8 @@ void svd_m4(float U[4][4], float s[4], float V[4][4], float A_[4][4]) // Calculate the shift. float scale = maxf(maxf(maxf(maxf( - fabsf(s[p - 1]),fabsf(s[p - 2])),fabsf(e[p - 2])), - fabsf(s[k])),fabsf(e[k])); + fabsf(s[p - 1]), fabsf(s[p - 2])), fabsf(e[p - 2])), + fabsf(s[k])), fabsf(e[k])); float invscale = 1.0f / scale; float sp = s[p - 1] * invscale; float spm1 = s[p - 2] * invscale; |