diff options
Diffstat (limited to 'source/blender/blenkernel/intern/paint.c')
| -rw-r--r-- | source/blender/blenkernel/intern/paint.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/paint.c b/source/blender/blenkernel/intern/paint.c index a001a13d000..cc647a90c8f 100644 --- a/source/blender/blenkernel/intern/paint.c +++ b/source/blender/blenkernel/intern/paint.c @@ -40,6 +40,7 @@ #include "BLI_bitmap.h" #include "BLI_utildefines.h" +#include "BLI_math_vector.h" #include "BKE_brush.h" #include "BKE_context.h" @@ -300,3 +301,22 @@ float paint_grid_paint_mask(const GridPaintMask *gpm, unsigned level, return gpm->data[(y * factor) * gridsize + (x * factor)]; } + +/* threshhold to move before updating the brush rotation */ +#define RAKE_THRESHHOLD 20 + +void paint_calculate_rake_rotation(UnifiedPaintSettings *ups, const float mouse_pos[2]) +{ + const float u = 0.5f; + const float r = RAKE_THRESHHOLD; + + float dpos[2]; + sub_v2_v2v2(dpos, ups->last_rake, mouse_pos); + + if (len_squared_v2(dpos) >= r * r) { + ups->brush_rotation = atan2(dpos[0], dpos[1]); + + interp_v2_v2v2(ups->last_rake, ups->last_rake, + mouse_pos, u); + } +} |