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Fix for recent error, ngons now flipped correctly

This commit is contained in:
Campbell Barton 2015-07-07 19:53:56 +10:00
parent 23aa425cd9
commit 5af1daa2dc
Notes: blender-bot 2023-02-14 10:48:33 +01:00 
Referenced by issue #45359, Viewport backculling on ngons culls front faces instead
1 changed files with 3 additions and 3 deletions
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6
source/blender/blenkernel/intern/mesh_evaluate.c
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@ -2391,12 +2391,12 @@ int BKE_mesh_recalc_tessellation(
zero_v3(normal);
/* calc normal */
/* calc normal, flipped: to get a positive 2d cross product */
ml = mloop + mp_loopstart;
co_prev = mvert[ml[mp_totloop - 1].v].co;
for (j = 0; j < mp_totloop; j++, ml++) {
co_curr = mvert[ml->v].co;
add_newell_cross_v3_v3v3(normal, co_prev, co_curr);
add_newell_cross_v3_v3v3(normal, co_curr, co_prev);
co_prev = co_curr;
}
if (UNLIKELY(normalize_v3(normal) == 0.0f)) {
@ -2411,7 +2411,7 @@ int BKE_mesh_recalc_tessellation(
mul_v2_m3v3(projverts[j], axis_mat, mvert[ml->v].co);
}
BLI_polyfill_calc_arena((const float (*)[2])projverts, mp_totloop, -1, tris, arena);
BLI_polyfill_calc_arena((const float (*)[2])projverts, mp_totloop, 1, tris, arena);
/* apply fill */
for (j = 0; j < totfilltri; j++) {