diff options
Diffstat (limited to 'source/blender/editors/space_view3d')
-rw-r--r-- | source/blender/editors/space_view3d/view3d_project.c | 50 |
1 files changed, 35 insertions, 15 deletions
diff --git a/source/blender/editors/space_view3d/view3d_project.c b/source/blender/editors/space_view3d/view3d_project.c index 6ba05abae9a..34b983f83df 100644 --- a/source/blender/editors/space_view3d/view3d_project.c +++ b/source/blender/editors/space_view3d/view3d_project.c @@ -296,7 +296,7 @@ void ED_view3d_win_to_ray(ARegion *ar, View3D *v3d, const float mval[2], float r { float ray_end[3]; - ED_view3d_win_to_segment_clip(ar, v3d, mval, ray_start, ray_end); + ED_view3d_win_to_segment(ar, v3d, mval, ray_start, ray_end); sub_v3_v3v3(ray_normal, ray_end, ray_start); normalize_v3(ray_normal); } @@ -419,19 +419,7 @@ void ED_view3d_win_to_vector(ARegion *ar, const float mval[2], float out[3]) normalize_v3(out); } -/** - * Calculate a 3d segment from 2d window coordinates. - * This ray_start is located at the viewpoint, ray_end is a far point. - * ray_start and ray_end are clipped by the view near and far limits - * so points along this line are always in view. - * In orthographic view all resulting segments will be parallel. - * \param ar The region (used for the window width and height). - * \param v3d The 3d viewport (used for near and far clipping range). - * \param mval The area relative 2d location (such as event->mval, converted into float[2]). - * \param ray_start The world-space starting point of the segment. - * \param ray_end The world-space end point of the segment. - */ -void ED_view3d_win_to_segment_clip(ARegion *ar, View3D *v3d, const float mval[2], float ray_start[3], float ray_end[3]) +void ED_view3d_win_to_segment(ARegion *ar, View3D *v3d, const float mval[2], float ray_start[3], float ray_end[3]) { RegionView3D *rv3d = ar->regiondata; @@ -455,14 +443,46 @@ void ED_view3d_win_to_segment_clip(ARegion *ar, View3D *v3d, const float mval[2] madd_v3_v3v3fl(ray_start, vec, rv3d->viewinv[2], 1000.0f); madd_v3_v3v3fl(ray_end, vec, rv3d->viewinv[2], -1000.0f); } +} + +/** + * Calculate a 3d segment from 2d window coordinates. + * This ray_start is located at the viewpoint, ray_end is a far point. + * ray_start and ray_end are clipped by the view near and far limits + * so points along this line are always in view. + * In orthographic view all resulting segments will be parallel. + * \param ar The region (used for the window width and height). + * \param v3d The 3d viewport (used for near and far clipping range). + * \param mval The area relative 2d location (such as event->mval, converted into float[2]). + * \param ray_start The world-space starting point of the segment. + * \param ray_end The world-space end point of the segment. + * \return success, FALSE if the segment is totally clipped. + */ +int ED_view3d_win_to_segment_clip(ARegion *ar, View3D *v3d, const float mval[2], float ray_start[3], float ray_end[3]) +{ + RegionView3D *rv3d = ar->regiondata; + ED_view3d_win_to_segment(ar, v3d, mval, ray_start, ray_end); /* clipping */ if (rv3d->rflag & RV3D_CLIPPING) { + /* if the ray is totally clipped, + * restore the original values but return FALSE + * caller can choose what to do */ + float tray_start[3] = {UNPACK3(ray_start)}; + float tray_end[3] = {UNPACK3(ray_end)}; int a; for (a = 0; a < 4; a++) { - clip_line_plane(ray_start, ray_end, rv3d->clip[a]); + if (clip_line_plane(tray_start, tray_end, rv3d->clip[a]) == FALSE) { + return FALSE; + } } + + /* copy in clipped values */ + copy_v3_v3(ray_start, tray_start); + copy_v3_v3(ray_end, tray_end); } + + return TRUE; } |