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Algorithm to do a geometric matching (planes only)

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This commit is contained in:
wmayer 2012-11-05 14:50:02 +01:00
parent 0149742d62
commit e432930f21
2 changed files with 42 additions and 0 deletions
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41
src/Mod/PartDesign/App/FeatureSketchBased.cpp
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@ -41,6 +41,7 @@
# include <TopoDS_Wire.hxx>
# include <TopoDS_Vertex.hxx>
# include <TopExp_Explorer.hxx>
# include <gp_Ax1.hxx>
# include <gp_Pln.hxx>
# include <ShapeFix_Face.hxx>
# include <ShapeFix_Wire.hxx>
@ -551,6 +552,7 @@ void SketchBased::remapSupportShape(const TopoDS_Shape& newShape)
TopoDS_Shape element = shape.getSubShape(it->c_str());
bool success = false;
// first try an exact matching
for (int i=1; i<faceMap.Extent(); i++) {
if (isQuasiEqual(element, faceMap.FindKey(i))) {
std::stringstream str;
@ -560,6 +562,18 @@ void SketchBased::remapSupportShape(const TopoDS_Shape& newShape)
break;
}
}
// if an exact matching fails then try to compare only the geometries
if (!success) {
for (int i=1; i<faceMap.Extent(); i++) {
if (isEqualGeometry(element, faceMap.FindKey(i))) {
std::stringstream str;
str << shapetype << i;
newSubValues.push_back(str.str());
success = true;
break;
}
}
}
// the new shape couldn't be found so keep the old sub-name
if (!success)
@ -623,4 +637,31 @@ bool SketchBased::isQuasiEqual(const TopoDS_Shape& s1, const TopoDS_Shape& s2) c
return true;
}
bool SketchBased::isEqualGeometry(const TopoDS_Shape& s1, const TopoDS_Shape& s2)
{
if (s1.ShapeType() == TopAbs_FACE && s2.ShapeType() == TopAbs_FACE) {
BRepAdaptor_Surface a1(TopoDS::Face(s1));
BRepAdaptor_Surface a2(TopoDS::Face(s2));
if (a1.GetType() == GeomAbs_Plane && a2.GetType() == GeomAbs_Plane) {
gp_Pln p1 = a1.Plane();
gp_Pln p2 = a2.Plane();
if (p1.Distance(p2.Location()) < Precision::Confusion()) {
const gp_Dir& d1 = p1.Axis().Direction();
const gp_Dir& d2 = p2.Axis().Direction();
if (d1.IsParallel(d2, Precision::Confusion()))
return true;
}
}
}
else if (s1.ShapeType() == TopAbs_EDGE && s2.ShapeType() == TopAbs_EDGE) {
}
else if (s1.ShapeType() == TopAbs_VERTEX && s2.ShapeType() == TopAbs_VERTEX) {
gp_Pnt p1 = BRep_Tool::Pnt(TopoDS::Vertex(s1));
gp_Pnt p2 = BRep_Tool::Pnt(TopoDS::Vertex(s2));
return p1.Distance(p2) < Precision::Confusion();
}
return false;
}
}

1
src/Mod/PartDesign/App/FeatureSketchBased.h
View File

@ -77,6 +77,7 @@ protected:
TopoDS_Shape makeFace(const std::vector<TopoDS_Wire>&) const;
TopoDS_Shape makeFace(std::list<TopoDS_Wire>&) const; // for internal use only
bool isInside(const TopoDS_Wire&, const TopoDS_Wire&) const;
bool isEqualGeometry(const TopoDS_Shape&, const TopoDS_Shape&);
bool isQuasiEqual(const TopoDS_Shape&, const TopoDS_Shape&) const;
void remapSupportShape(const TopoDS_Shape&);