Revision: 55755
http://sourceforge.net/p/brlcad/code/55755
Author: indianlarry
Date: 2013-06-13 17:40:16 +0000 (Thu, 13 Jun 2013)
Log Message:
-----------
The newton solver iterates until it gets within a program specified closeness
tolerance to the ray under consideration. The UV parameters are then checked
to determine if they are within the current surface subdivision bounding (SSB)
box under evaluation. For rays close to the UV border the solver occasionally
fails because it jumps slightly out of its current UV but within the ray
closeness tolerance. These rays are usually picked up when evaluating the
adjacent SSB but not always. To make sure these valid hit points aren't dropped
I've added a slight tolerance (VUNITIZE_TOL) to the UV check. This fix is
related to speckling picked up on raytraced images of implicit geometries
converted to a BREP.
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/brep/brep.cpp
Modified: brlcad/trunk/src/librt/primitives/brep/brep.cpp
===================================================================
--- brlcad/trunk/src/librt/primitives/brep/brep.cpp 2013-06-13 17:02:11 UTC
(rev 55754)
+++ brlcad/trunk/src/librt/primitives/brep/brep.cpp 2013-06-13 17:40:16 UTC
(rev 55755)
@@ -788,10 +788,13 @@
}
if (rootdist < ROOT_TOL) {
- if (sbv->m_u.Includes(uv.x) && sbv->m_v.Includes(uv.y)) {
+ int ulow = (sbv->m_u.m_t[0] <= sbv->m_u.m_t[1]) ? 0 : 1;
+ int vlow = (sbv->m_v.m_t[0] <= sbv->m_v.m_t[1]) ? 0 : 1;
+ if ((sbv->m_u.m_t[ulow]-VUNITIZE_TOL < uv.x && uv.x <
sbv->m_u.m_t[1-ulow]+VUNITIZE_TOL) &&
+ (sbv->m_v.m_t[vlow]-VUNITIZE_TOL < uv.y && uv.y <
sbv->m_v.m_t[1-vlow]-VUNITIZE_TOL)) {
bool new_point = true;
for (int j=0;j<count;j++) {
- if (NEAR_EQUAL(uv.x, ouv[j].x, 0.0001) && NEAR_EQUAL(uv.y,
ouv[j].y, 0.0001)) {
+ if (NEAR_EQUAL(uv.x, ouv[j].x, VUNITIZE_TOL) &&
NEAR_EQUAL(uv.y, ouv[j].y, VUNITIZE_TOL)) {
new_point = false;
}
}
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