diff options
| -rw-r--r-- | source/blender/editors/include/ED_view3d.h | 2 | ||||
| -rw-r--r-- | source/blender/editors/space_view3d/view3d_view.c | 25 |
2 files changed, 27 insertions, 0 deletions
diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h index 13ef235d8fe..de5a9fe4e07 100644 --- a/source/blender/editors/include/ED_view3d.h +++ b/source/blender/editors/include/ED_view3d.h @@ -93,6 +93,8 @@ void project_int_noclip(struct ARegion *ar, float *vec, int *adr); void project_float(struct ARegion *ar, float *vec, float *adr); void project_float_noclip(struct ARegion *ar, float *vec, float *adr); +void viewvector(struct RegionView3D *rv3d, float coord[3], float vec[3]); + void viewline(struct ARegion *ar, struct View3D *v3d, float mval[2], float ray_start[3], float ray_end[3]); void viewray(struct ARegion *ar, struct View3D *v3d, float mval[2], float ray_start[3], float ray_normal[3]); diff --git a/source/blender/editors/space_view3d/view3d_view.c b/source/blender/editors/space_view3d/view3d_view.c index bbf728d31c0..48f3c77091f 100644 --- a/source/blender/editors/space_view3d/view3d_view.c +++ b/source/blender/editors/space_view3d/view3d_view.c @@ -576,6 +576,31 @@ void viewray(ARegion *ar, View3D *v3d, float mval[2], float ray_start[3], float normalize_v3(ray_normal); } +void viewvector(RegionView3D *rv3d, float coord[3], float vec[3]) +{ + if (rv3d->persp != RV3D_ORTHO) + { + float p1[4], p2[4]; + + VECCOPY(p1, coord); + p1[3] = 1.0f; + VECCOPY(p2, p1); + p2[3] = 1.0f; + mul_m4_v4(rv3d->viewmat, p2); + + p2[0] = 2.0f * p2[0]; + p2[1] = 2.0f * p2[1]; + p2[2] = 2.0f * p2[2]; + + mul_m4_v4(rv3d->viewinv, p2); + + sub_v3_v3v3(vec, p1, p2); + } + else { + VECCOPY(vec, rv3d->viewinv[2]); + } + normalize_v3(vec); +} void initgrabz(RegionView3D *rv3d, float x, float y, float z) { |