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Fix T45096: Bad UVs /w EdgeSlide & zero-area faces

This commit is contained in:
Campbell Barton 2015-06-17 05:48:55 +10:00 committed by Sergey Sharybin
parent f751e7dc77
commit 7c4d9523e6
Notes: blender-bot 2023-02-14 09:00:17 +01:00 
Referenced by issue #45096, Edge slide UV correction fails with zero area faces
1 changed files with 29 additions and 4 deletions
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33
source/blender/editors/transform/transform.c
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@ -5391,11 +5391,36 @@ static void slide_origdata_interp_data_vert(
/* weight the loop */
if (do_loop_weight) {
const float *v_prev = slide_origdata_orig_vert_co(sod, l->prev->v);
const float *v_next = slide_origdata_orig_vert_co(sod, l->next->v);
const float dist = dist_signed_squared_to_corner_v3v3v3(sv->v->co, v_prev, sv->co_orig_3d, v_next, f_copy->no);
const float eps = 0.00001f;
loop_weights[j] = (dist >= 0.0f) ? 1.0f : ((dist <= -eps) ? 0.0f : (1.0f + (dist / eps)));
const BMLoop *l_prev = l->prev;
const BMLoop *l_next = l->next;
const float *co_prev = slide_origdata_orig_vert_co(sod, l_prev->v);
const float *co_next = slide_origdata_orig_vert_co(sod, l_next->v);
bool co_prev_ok;
bool co_next_ok;
/* In the unlikely case that we're next to a zero length edge - walk around the to the next.
* Since we only need to check if the vertex is in this corner,
* its not important _which_ loop - as long as its not overlapping 'sv->co_orig_3d', see: T45096. */
while (UNLIKELY(((co_prev_ok = (len_squared_v3v3(sv->co_orig_3d, co_prev) > eps)) == false) &&
((l_prev = l_prev->prev) != l->next)))
{
co_prev = slide_origdata_orig_vert_co(sod, l_prev->v);
}
while (UNLIKELY(((co_next_ok = (len_squared_v3v3(sv->co_orig_3d, co_next) > eps)) == false) &&
((l_next = l_next->next) != l->prev)))
{
co_next = slide_origdata_orig_vert_co(sod, l_next->v);
}
if (co_prev_ok && co_next_ok && (area_tri_v3(co_prev, sv->co_orig_3d, co_next) > eps)) {
const float dist = dist_signed_squared_to_corner_v3v3v3(
sv->v->co, co_prev, sv->co_orig_3d, co_next, f_copy->no);
loop_weights[j] = (dist >= 0.0f) ? 1.0f : ((dist <= -eps) ? 0.0f : (1.0f + (dist / eps)));
}
else {
loop_weights[j] = 0.0f;
}
}
}