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Fix T42264: Negative scale & clipped-select fails 

Thanks to mont29 for finding the cause.
This commit is contained in:
Campbell Barton 2014-10-20 11:14:02 +02:00
parent 04178d7fe4
commit 3138d39047
Notes: blender-bot 2023-02-14 09:56:34 +01:00 
Referenced by issue #42329, mesh unwrapped although not selected
Referenced by issue #42264, Can't select vertices in a negative scale object, with ALT-B mask active and "limit selection to visible" disabled
1 changed files with 6 additions and 2 deletions
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8
source/blender/editors/space_view3d/view3d_edit.c
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@ -4380,12 +4380,16 @@ void VIEW3D_OT_background_image_remove(wmOperatorType *ot)
/* ********************* set clipping operator ****************** */
static void calc_clipping_plane(float clip[6][4], const BoundBox *clipbb)
static void calc_clipping_plane(float clip[6][4], const BoundBox *clipbb, const bool is_flip)
{
int val;
for (val = 0; val < 4; val++) {
normal_tri_v3(clip[val], clipbb->vec[val], clipbb->vec[val == 3 ? 0 : val + 1], clipbb->vec[val + 4]);
if (UNLIKELY(is_flip)) {
negate_v3(clip[val]);
}
clip[val][3] = -dot_v3v3(clip[val], clipbb->vec[val]);
}
}
@ -4402,7 +4406,7 @@ static void calc_local_clipping(float clip_local[6][4], BoundBox *clipbb, float
mul_v3_m4v3(clipbb_local.vec[i], imat, clipbb->vec[i]);
}
calc_clipping_plane(clip_local, &clipbb_local);
calc_clipping_plane(clip_local, &clipbb_local, is_negative_m4(mat));
}
void ED_view3d_clipping_local(RegionView3D *rv3d, float mat[4][4])