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- Ifc: check for self-intersecting contour lines to avoid duplicates.

pull/16/merge
Alexander Gessler 2013-01-22 16:31:31 +01:00
parent 8b823bd631
commit c2bd22507c
1 changed files with 17 additions and 15 deletions
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32
code/IFCGeometry.cpp
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@ -1478,16 +1478,21 @@ void FindAdjacentContours(ContourVector::iterator current, const ContourVector&
continue;
}
if(it == current) {
continue;
}
// this left here to make clear we also run on the current contour
// to check for overlapping contour segments (which can happen due
// to projection artifacts).
//if(it == current) {
// continue;
//}
const bool is_me = it == current;
const BoundingBox& ibb = (*it).bb;
// Assumption: the bounding boxes are pairwise disjoint
ai_assert(!BoundingBoxesOverlapping(bb, ibb));
// Assumption: the bounding boxes are pairwise disjoint or identical
ai_assert(is_me || !BoundingBoxesOverlapping(bb, ibb));
if (BoundingBoxesAdjacent(bb, ibb)) {
if (is_me || BoundingBoxesAdjacent(bb, ibb)) {
// Now do a each-against-everyone check for intersecting contour
// lines. This obviously scales terribly, but in typical real
@ -1501,8 +1506,8 @@ void FindAdjacentContours(ContourVector::iterator current, const ContourVector&
const IfcVector2& n0 = ncontour[n];
const IfcVector2& n1 = ncontour[(n+1) % ncontour.size()];
for (size_t m = 0, mend = mcontour.size(); m < mend; ++m) {
ai_assert(&mcontour != &ncontour);
for (size_t m = 0, mend = (is_me ? n : mcontour.size()); m < mend; ++m) {
ai_assert(&mcontour != &ncontour || m < n);
const IfcVector2& m0 = mcontour[m];
const IfcVector2& m1 = mcontour[(m+1) % mcontour.size()];
@ -2138,13 +2143,10 @@ bool GenerateOpenings(std::vector<TempOpening>& openings,
BOOST_FOREACH(IfcVector3& v3, curmesh.verts) {
v3 = minv * v3;
}
// TODO:
// This should connect the window openings on both sides of the wall,
// but it produces lots of artifacts which are not resolved yet.
// Most of all, it makes all cases in which adjacent openings are
// not correctly merged together glaringly obvious.
if (generate_connection_geometry) {
// Generate window caps to connect the symmetric openings on both sides
// of the wall.
if (generate_connection_geometry) {
CloseWindows(contours, minv, contours_to_openings, curmesh);
}
return true;