Revision: 73170
http://sourceforge.net/p/brlcad/code/73170
Author: starseeker
Date: 2019-05-24 12:43:38 +0000 (Fri, 24 May 2019)
Log Message:
-----------
Use the minimum edge segment length when deciding if triangles have a small
enough area to be considered degenerate.
Modified Paths:
--------------
brlcad/trunk/src/libbrep/cdt.cpp
Modified: brlcad/trunk/src/libbrep/cdt.cpp
===================================================================
--- brlcad/trunk/src/libbrep/cdt.cpp 2019-05-24 12:34:36 UTC (rev 73169)
+++ brlcad/trunk/src/libbrep/cdt.cpp 2019-05-24 12:43:38 UTC (rev 73170)
@@ -1051,6 +1051,10 @@
// area face. This is more complex to deal with, as it requires modifying
// non-degenerate faces in the neighborhood to incorporate different
points.
for (int face_index = 0; face_index != s_cdt->brep->m_F.Count();
face_index++) {
+ // Use a distance three orders of magnitude smaller than the smallest
+ // edge segment length of the face to decide if a face is degenerate
+ // based on area.
+ fastf_t dist = 0.001 * (*s_cdt->min_edge_seg_len)[face_index];
p2t::CDT *cdt = s_cdt->p2t_faces[face_index];
std::map<p2t::Point *, ON_3dPoint *> *pointmap =
s_cdt->tri_to_on3_maps[face_index];
std::vector<p2t::Triangle*> tris = cdt->GetTriangles();
@@ -1075,20 +1079,20 @@
* of degenerate triangles. */
ON_Line l(*tpnts[0], *tpnts[2]);
int is_zero_area = 0;
- if (l.Length() < s_cdt->dist) {
+ if (l.Length() < dist) {
ON_Line l2(*tpnts[0], *tpnts[1]);
- if (l2.Length() < s_cdt->dist) {
+ if (l2.Length() < dist) {
bu_log("completely degenerate triangle\n");
triangle_cnt--;
tris_degen.insert(t);
continue;
} else {
- if (l2.DistanceTo(*tpnts[2]) < s_cdt->dist) {
+ if (l2.DistanceTo(*tpnts[2]) < dist) {
is_zero_area = 1;
}
}
} else {
- if (l.DistanceTo(*tpnts[1]) < s_cdt->dist) {
+ if (l.DistanceTo(*tpnts[1]) < dist) {
is_zero_area = 1;
}
}
This was sent by the SourceForge.net collaborative development platform, the
world's largest Open Source development site.
_______________________________________________
BRL-CAD Source Commits mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/brlcad-commits
