/*----------------------------------------------------------------------*
| compute the overlap (public) mwgee 10/05|
*----------------------------------------------------------------------*/
bool MOERTEL::Overlap::ComputeOverlap()
{
bool ok = false;
ok = QuickOverlapTest();
if (!ok)
{
//if (foundit) std::cout << "QuickOverlapTest NOT passed\n";
return false;
}
// project master nodes onto slave segment if not already done
if (!havemxi_)
havemxi_ = build_mxi();
// perform a quick test
// build array of local sxi coords of nodes
havesxi_ = build_sxi();
// project slave nodes onto master segment
havesxim_ = build_sxim();
// build outward normal of edges of sseg (in local coords)
build_normal();
// compute information about the edges of the slave/master triangle
// in slave triangle coord system
if (!havelines_)
havelines_ = build_lines_s();
// compute information about the edges of the slave/master triangle
// in master triangle coord system
if (!havelinem_)
havelinem_ = build_lines_m();
// perform clipping algorithm
ok = Clipelements();
if (!ok)
return false;
// make a triangulation of the overlap polygon
ok = Triangulation();
if (!ok)
return false;
return true;
}
/*----------------------------------------------------------------------*
| compute the overlap (public) mwgee 10/05|
*----------------------------------------------------------------------*/
bool MOERTEL::Overlap::ComputeOverlap() {
// Returning false means there is no overlap between mseg and sseg
bool ok = false;
// If we pass the quick overlap test, that means that the master and slave segments are close
// enough to each other that they could interact.
ok = QuickOverlapTest();
if (!ok)
{
return false; // cannot interact
}
// project master nodes onto slave segment if not already done
// The master nodes that define the master segment are projected into the slave
// segment using:
// ProjectNodetoSegment_SegmentNormal(*mnode[i],sseg_,mxi_[i],gap);
if (!havemxi_)
havemxi_ = build_mxi();
// build array of local sxi coords of nodes
// These do not need to be projected as they are the coords of the slave nodes in the
// slave segment
havesxi_ = build_sxi();
// project slave nodes onto master segment
// These nodal coordinates are projected from the slave segment into the master, using
// ProjectNodetoSegment_NodalNormal(*snode[i],mseg_,sxim_[i],gap);
havesxim_ = build_sxim();
// build outward normal of edges of sseg (in local coords)
build_normal();
// compute information about the edges of the slave/master polygons
// in slave polygon coord system
if (!havelines_)
havelines_ = build_lines_s();
// compute information about the edges of the slave/master polygons
// in master polygon coord system
if (!havelinem_)
havelinem_ = build_lines_m();
// perform clipping algorithm
// If this returns false, it means that there is no effective overlap between the master and slave
// segments
// ok = Clipelements();
ok = ClipelementsSH(); // Use Sutherland-Hodgman algorithm
if (!ok)
return false;
// make a triangulation of the overlap polygon
ok = Triangulation();
if (!ok)
return false;
return true;
}