diff options
author | Mike Erwin <significant.bit@gmail.com> | 2016-09-25 19:48:11 +0300 |
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committer | Mike Erwin <significant.bit@gmail.com> | 2016-09-25 19:48:11 +0300 |
commit | 9bea012b8ca081a1bf696bf0af354ac327334354 (patch) | |
tree | 296ce96ad84a8fbe014a40f5dfae863042688a8c /source/blender/blenlib/intern | |
parent | 5c6baf1ee9754e39392926cd077bb2097baf39b9 (diff) |
specialize mat3 multiply routines
Same as 5c6baf1ee9754e39392926cd077bb2097baf39b9 but for 3x3 matrices.
Diffstat (limited to 'source/blender/blenlib/intern')
-rw-r--r-- | source/blender/blenlib/intern/math_matrix.c | 54 |
1 files changed, 37 insertions, 17 deletions
diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c index b22061b4ea8..2088ec8870e 100644 --- a/source/blender/blenlib/intern/math_matrix.c +++ b/source/blender/blenlib/intern/math_matrix.c @@ -229,27 +229,47 @@ void mul_m4_m4_post(float R[4][4], const float B[4][4]) mul_m4_m4m4_uniq(R, A, B); } -void mul_m3_m3m3(float m1[3][3], const float m3_[3][3], const float m2_[3][3]) +void mul_m3_m3m3(float R[3][3], const float A[3][3], const float B[3][3]) { - float m2[3][3], m3[3][3]; + if (A == R) + mul_m3_m3_post(R, B); + else if (B == R) + mul_m3_m3_pre(R, A); + else + mul_m3_m3m3_uniq(R, A, B); +} - /* copy so it works when m1 is the same pointer as m2 or m3 */ - /* TODO: avoid copying when matrices are different */ - copy_m3_m3(m2, m2_); - copy_m3_m3(m3, m3_); +void mul_m3_m3_pre(float R[3][3], const float A[3][3]) +{ + BLI_assert(A != R); + float B[3][3]; + copy_m3_m3(B, R); + mul_m3_m3m3_uniq(R, A, B); +} - /* m1[i][j] = m2[i][k] * m3[k][j], args are flipped! */ - m1[0][0] = m2[0][0] * m3[0][0] + m2[0][1] * m3[1][0] + m2[0][2] * m3[2][0]; - m1[0][1] = m2[0][0] * m3[0][1] + m2[0][1] * m3[1][1] + m2[0][2] * m3[2][1]; - m1[0][2] = m2[0][0] * m3[0][2] + m2[0][1] * m3[1][2] + m2[0][2] * m3[2][2]; +void mul_m3_m3_post(float R[3][3], const float B[3][3]) +{ + BLI_assert(B != R); + float A[3][3]; + copy_m3_m3(A, R); + mul_m3_m3m3_uniq(R, A, B); +} - m1[1][0] = m2[1][0] * m3[0][0] + m2[1][1] * m3[1][0] + m2[1][2] * m3[2][0]; - m1[1][1] = m2[1][0] * m3[0][1] + m2[1][1] * m3[1][1] + m2[1][2] * m3[2][1]; - m1[1][2] = m2[1][0] * m3[0][2] + m2[1][1] * m3[1][2] + m2[1][2] * m3[2][2]; +void mul_m3_m3m3_uniq(float R[3][3], const float A[3][3], const float B[3][3]) +{ + BLI_assert(R != A && R != B); - m1[2][0] = m2[2][0] * m3[0][0] + m2[2][1] * m3[1][0] + m2[2][2] * m3[2][0]; - m1[2][1] = m2[2][0] * m3[0][1] + m2[2][1] * m3[1][1] + m2[2][2] * m3[2][1]; - m1[2][2] = m2[2][0] * m3[0][2] + m2[2][1] * m3[1][2] + m2[2][2] * m3[2][2]; + R[0][0] = B[0][0] * A[0][0] + B[0][1] * A[1][0] + B[0][2] * A[2][0]; + R[0][1] = B[0][0] * A[0][1] + B[0][1] * A[1][1] + B[0][2] * A[2][1]; + R[0][2] = B[0][0] * A[0][2] + B[0][1] * A[1][2] + B[0][2] * A[2][2]; + + R[1][0] = B[1][0] * A[0][0] + B[1][1] * A[1][0] + B[1][2] * A[2][0]; + R[1][1] = B[1][0] * A[0][1] + B[1][1] * A[1][1] + B[1][2] * A[2][1]; + R[1][2] = B[1][0] * A[0][2] + B[1][1] * A[1][2] + B[1][2] * A[2][2]; + + R[2][0] = B[2][0] * A[0][0] + B[2][1] * A[1][0] + B[2][2] * A[2][0]; + R[2][1] = B[2][0] * A[0][1] + B[2][1] * A[1][1] + B[2][2] * A[2][1]; + R[2][2] = B[2][0] * A[0][2] + B[2][1] * A[1][2] + B[2][2] * A[2][2]; } void mul_m4_m4m3(float m1[4][4], const float m3_[4][4], const float m2_[3][3]) @@ -1651,7 +1671,7 @@ void translate_m4(float mat[4][4], float Tx, float Ty, float Tz) mat[3][2] += (Tx * mat[0][2] + Ty * mat[1][2] + Tz * mat[2][2]); } -/* TODO: enum for axis */ +/* TODO: enum for axis? */ void rotate_m4(float mat[4][4], const char axis, const float angle) { int col; |