diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_matrix.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_matrix.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c index 221ae84e74d..d997eae26fb 100644 --- a/source/blender/blenlib/intern/math_matrix.c +++ b/source/blender/blenlib/intern/math_matrix.c @@ -3116,6 +3116,34 @@ bool has_zero_axis_m4(const float matrix[4][4]) len_squared_v3(matrix[2]) < FLT_EPSILON; } +void zero_axis_bias_m4(float mat[4][4]) +{ + const bool axis_x_degenerate = len_squared_v3(mat[0]) < FLT_EPSILON; + const bool axis_y_degenerate = len_squared_v3(mat[1]) < FLT_EPSILON; + const bool axis_z_degenerate = len_squared_v3(mat[2]) < FLT_EPSILON; + + /* X Axis. */ + if (axis_x_degenerate && !axis_y_degenerate && !axis_z_degenerate) { + cross_v3_v3v3(mat[0], mat[1], mat[2]); + mul_v3_fl(mat[0], FLT_EPSILON); + return; + } + + /* Y Axis. */ + if (!axis_x_degenerate && axis_y_degenerate && !axis_z_degenerate) { + cross_v3_v3v3(mat[1], mat[2], mat[0]); + mul_v3_fl(mat[1], FLT_EPSILON); + return; + } + + /* Z Axis. */ + if (!axis_x_degenerate && !axis_y_degenerate && axis_z_degenerate) { + cross_v3_v3v3(mat[2], mat[0], mat[1]); + mul_v3_fl(mat[2], FLT_EPSILON); + return; + } +} + void invert_m4_m4_safe(float inverse[4][4], const float mat[4][4]) { if (!invert_m4_m4(inverse, mat)) { |