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| author | Campbell Barton <ideasman42@gmail.com> | 2012-03-13 05:11:08 +0400 |
|---|---|---|
| committer | Campbell Barton <ideasman42@gmail.com> | 2012-03-13 05:11:08 +0400 |
| commit | 8646bb446419592f8acc8ed0cdf8337bfc4a07eb (patch) | |
| tree | 4ee959f06e2ffe18cb9dd1c91266c9e9ad81c686 /source/blender/editors/mesh/knifetool.c | |
| parent | b457c7fdbdf0b8cf7a4535574d9894d8850c55f4 (diff) | |
workaround [#30480] Knife tool flicker
the problem was numeric precision when in ortho mode the start/end points for the view vector would be 2000 apart which caused trouble for the intersection test.
Diffstat (limited to 'source/blender/editors/mesh/knifetool.c')
| -rw-r--r-- | source/blender/editors/mesh/knifetool.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/source/blender/editors/mesh/knifetool.c b/source/blender/editors/mesh/knifetool.c index f70257614bf..1866b88a1bf 100644 --- a/source/blender/editors/mesh/knifetool.c +++ b/source/blender/editors/mesh/knifetool.c @@ -1178,6 +1178,16 @@ static void knife_find_line_hits(knifetool_opdata *kcd) mul_m4_v3(kcd->ob->imat, v3); mul_m4_v3(kcd->ob->imat, v4); + /* numeric error, 'v1' -> 'v2', 'v2' -> 'v4' can end up being ~2000 units apart in otho mode + * (from ED_view3d_win_to_segment_clip() above) + * this gives precision error in 'knife_edge_tri_isect', rather then solving properly + * (which may involve using doubles everywhere!), + * limit the distance between these points */ + if (kcd->is_ortho) { + limit_dist_v3(v1, v3, 200.0f); + limit_dist_v3(v2, v4, 200.0f); + } + BLI_smallhash_init(ehash); /* test two triangles of sceen line's plane */ |