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- Fix a regression due to too high tolerance in Polyline -Loop creation.

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- Make tolerances slightly more explicit, ideally these should obviously be configurable at runtime.
This commit is contained in:
Thomas Krijnen
2012-03-20 09:32:51 +00:00
parent 4760ad1910
commit df2bcecf96
4 changed files with 17 additions and 9 deletions
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src/ifcgeom/IfcGeom.h
+8
View File
@@ -42,6 +42,14 @@
#include "../ifcgeom/IfcShapeList.h"
// Tolerances for various geometrical operations:
// Specifies the deflection of the mesher
#define DEFLECTION_TOLERANCE 0.001
// Specifies the tolerance of the wire builder, most notably for trimmed curves
#define WIRE_CREATION_TOLERANCE 0.0001
// Specifies the treshold distance under which cartesian points are deemed equal
#define POINT_EQUALITY_TOLERANCE 0.000001
#define FACESET_AS_COMPOUND 1
namespace IfcGeom {
src/ifcgeom/IfcGeomFunctions.cpp
+4 -4
View File
@@ -278,8 +278,8 @@ bool IfcGeom::is_convex(const TopoDS_Wire& wire) {
edge_points.push_back(P2);
}
if ( edge_points.size() != 2 ) continue;
if ( edge_points[0].IsEqual(P1,0.0001)) neighbors.push_back(edge_points[1]);
else if ( edge_points[1].IsEqual(P1,0.0001)) neighbors.push_back(edge_points[0]);
if ( edge_points[0].IsEqual(P1,POINT_EQUALITY_TOLERANCE)) neighbors.push_back(edge_points[1]);
else if ( edge_points[1].IsEqual(P1,POINT_EQUALITY_TOLERANCE)) neighbors.push_back(edge_points[0]);
}
// There should be two of these
if ( neighbors.size() != 2 ) return false;
@@ -288,10 +288,10 @@ bool IfcGeom::is_convex(const TopoDS_Wire& wire) {
for ( TopExp_Explorer exp2(wire,TopAbs_VERTEX); exp2.More(); exp2.Next() ) {
TopoDS_Vertex V2 = TopoDS::Vertex(exp2.Current());
gp_Pnt P2 = BRep_Tool::Pnt(V2);
if ( P1.IsEqual(P2,0.0001) ) continue;
if ( P1.IsEqual(P2,POINT_EQUALITY_TOLERANCE) ) continue;
bool found = false;
for( std::vector<gp_Pnt>::const_iterator it = neighbors.begin(); it != neighbors.end(); ++ it ) {
if ( (*it).IsEqual(P2,0.0001) ) { found = true; break; }
if ( (*it).IsEqual(P2,POINT_EQUALITY_TOLERANCE) ) { found = true; break; }
}
if ( ! found ) non_neighbors.push_back(P2);
}
src/ifcgeom/IfcGeomObjects.cpp
+1 -1
View File
@@ -103,7 +103,7 @@ IfcGeomObjects::IfcMesh::IfcMesh(int i, const IfcGeom::ShapeList& shapes) {
// Triangulate the shape
try {
//BRepTools::Clean(s);
BRepMesh::Mesh(s,0.001f);
BRepMesh::Mesh(s,DEFLECTION_TOLERANCE);
} catch(...) {
Ifc::LogMessage("Error","Failed to triangulate mesh:",Ifc::EntityById(i)->entity);
continue;
src/ifcgeom/IfcGeomWires.cpp
+4 -4
View File
@@ -114,7 +114,7 @@ bool IfcGeom::convert(const Ifc2x3::IfcCompositeCurve::ptr l, TopoDS_Wire& wire)
}
if ( ! (*it)->SameSense() ) wire2.Reverse();
ShapeFix_ShapeTolerance FTol;
FTol.SetTolerance(wire2, 0.0001, TopAbs_WIRE);
FTol.SetTolerance(wire2, WIRE_CREATION_TOLERANCE, TopAbs_WIRE);
/*if ( it != segments->begin() ) {
TopExp_Explorer exp (wire2,TopAbs_VERTEX);
const TopoDS_Vertex& first_vertex = TopoDS::Vertex(exp.Current());
@@ -201,7 +201,7 @@ bool IfcGeom::convert(const Ifc2x3::IfcPolyline::ptr l, TopoDS_Wire& result) {
gp_Pnt P1;gp_Pnt P2;
for( Ifc2x3::IfcCartesianPoint::it it = points->begin(); it != points->end(); ++ it ) {
IfcGeom::convert(*it,P2);
if ( it != points->begin() && ( !P1.IsEqual(P2,0.0001) ) )
if ( it != points->begin() && ( !P1.IsEqual(P2,POINT_EQUALITY_TOLERANCE) ) )
w.Add(BRepBuilderAPI_MakeEdge(P1,P2));
P1 = P2;
}
@@ -217,13 +217,13 @@ bool IfcGeom::convert(const Ifc2x3::IfcPolyLoop::ptr l, TopoDS_Wire& result) {
int count = 0;
for( Ifc2x3::IfcCartesianPoint::it it = points->begin(); it != points->end(); ++ it ) {
IfcGeom::convert(*it,P2);
if ( it != points->begin() && ( !P1.IsEqual(P2,0.0001) ) ) {
if ( it != points->begin() && ( !P1.IsEqual(P2,POINT_EQUALITY_TOLERANCE) ) ) {
w.Add(BRepBuilderAPI_MakeEdge(P1,P2));
count ++;
} else if ( ! count ) F = P2;
P1 = P2;
}
if ( !P1.IsEqual(F,0.0001) ) {
if ( !P1.IsEqual(F,POINT_EQUALITY_TOLERANCE) ) {
w.Add(BRepBuilderAPI_MakeEdge(P1,F));
count ++;
}