Commit: 0a446d7276e74e3c8472453948204ca6463d158e Author: Luca Rood Date: Thu Dec 22 02:13:03 2016 -0200 Branches: master https://developer.blender.org/rB0a446d7276e74e3c8472453948204ca6463d158e
Add 3d to 2d plane mapping functions to math lib This adds two functions to project 3d coordinates onto a 3d plane, to get 2d coordinates, essentially eliminating the plane's normal axis from the coordinates. Reviewed By: mont29 Differential Revision: https://developer.blender.org/D2460 =================================================================== M source/blender/blenlib/BLI_math_geom.h M source/blender/blenlib/intern/math_geom.c =================================================================== diff --git a/source/blender/blenlib/BLI_math_geom.h b/source/blender/blenlib/BLI_math_geom.h index d33c2cb327..e3635be671 100644 --- a/source/blender/blenlib/BLI_math_geom.h +++ b/source/blender/blenlib/BLI_math_geom.h @@ -389,6 +389,8 @@ void box_minmax_bounds_m4(float min[3], float max[3], void map_to_tube(float *r_u, float *r_v, const float x, const float y, const float z); void map_to_sphere(float *r_u, float *r_v, const float x, const float y, const float z); +void map_to_plane_v2_v3v3(float r_co[2], const float co[3], const float no[3]); +void map_to_plane_axis_angle_v2_v3v3fl(float r_co[2], const float co[3], const float axis[3], const float angle); /********************************** Normals **********************************/ diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index 74ede1e755..8f5d84dfa0 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -4048,6 +4048,26 @@ void map_to_sphere(float *r_u, float *r_v, const float x, const float y, const f } } +void map_to_plane_v2_v3v3(float r_co[2], const float co[3], const float no[3]) +{ + float target[3] = {0.0f, 0.0f, 1.0f}; + float axis[3]; + + cross_v3_v3v3(axis, no, target); + normalize_v3(axis); + + map_to_plane_axis_angle_v2_v3v3fl(r_co, co, axis, angle_normalized_v3v3(no, target)); +} + +void map_to_plane_axis_angle_v2_v3v3fl(float r_co[2], const float co[3], const float axis[3], const float angle) +{ + float tmp[3]; + + rotate_normalized_v3_v3v3fl(tmp, co, axis, angle); + + copy_v2_v2(r_co, tmp); +} + /********************************* Normals **********************************/ void accumulate_vertex_normals_tri( _______________________________________________ Bf-blender-cvs mailing list Bf-blender-cvs@blender.org https://lists.blender.org/mailman/listinfo/bf-blender-cvs
