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0033046: Modeling algorithms - improve performance of per-facet shape construction

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Add new class (BRepBuilderAPI_MakeShapeOnMesh) to reconstruct shape from triangulation on per-facet basis.
This commit is contained in:
aml
2022-06-30 11:47:41 +03:00
committed by smoskvin
parent e1f7382910
commit e1d576bf31
10 changed files with 327 additions and 62 deletions
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65
src/StlAPI/StlAPI_Reader.cxx
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@@ -13,18 +13,9 @@
#include <StlAPI_Reader.hxx>
#include <BRep_Builder.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <BRepBuilderAPI_MakePolygon.hxx>
#include <BRepBuilderAPI_MakeVertex.hxx>
#include <BRepBuilderAPI_MakeShapeOnMesh.hxx>
#include <BRepBuilderAPI_Sewing.hxx>
#include <gp_Pnt.hxx>
#include <RWStl.hxx>
#include <TopoDS_Compound.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Wire.hxx>
//=============================================================================
//function : Read
@@ -35,55 +26,17 @@ Standard_Boolean StlAPI_Reader::Read (TopoDS_Shape& theShape,
{
Handle(Poly_Triangulation) aMesh = RWStl::ReadFile (theFileName);
if (aMesh.IsNull())
{
return Standard_False;
}
TopoDS_Vertex aTriVertexes[3];
TopoDS_Face aFace;
TopoDS_Wire aWire;
BRepBuilderAPI_Sewing aSewingTool;
aSewingTool.Init (1.0e-06, Standard_True);
BRepBuilderAPI_MakeShapeOnMesh aConverter(aMesh);
aConverter.Build();
if (!aConverter.IsDone())
return Standard_False;
TopoDS_Compound aComp;
BRep_Builder BuildTool;
BuildTool.MakeCompound (aComp);
TopoDS_Shape aResult = aConverter.Shape();
if (aResult.IsNull())
return Standard_False;
for (Standard_Integer aTriIdx = 1; aTriIdx <= aMesh->NbTriangles(); ++aTriIdx)
{
const Poly_Triangle aTriangle = aMesh->Triangle (aTriIdx);
Standard_Integer anId[3];
aTriangle.Get(anId[0], anId[1], anId[2]);
const gp_Pnt aPnt1 = aMesh->Node (anId[0]);
const gp_Pnt aPnt2 = aMesh->Node (anId[1]);
const gp_Pnt aPnt3 = aMesh->Node (anId[2]);
if (!(aPnt1.IsEqual (aPnt2, 0.0))
&& !(aPnt1.IsEqual (aPnt3, 0.0)))
{
aTriVertexes[0] = BRepBuilderAPI_MakeVertex (aPnt1);
aTriVertexes[1] = BRepBuilderAPI_MakeVertex (aPnt2);
aTriVertexes[2] = BRepBuilderAPI_MakeVertex (aPnt3);
aWire = BRepBuilderAPI_MakePolygon (aTriVertexes[0], aTriVertexes[1], aTriVertexes[2], Standard_True);
if (!aWire.IsNull())
{
aFace = BRepBuilderAPI_MakeFace (aWire);
if (!aFace.IsNull())
{
BuildTool.Add (aComp, aFace);
}
}
}
}
aSewingTool.Load (aComp);
aSewingTool.Perform();
theShape = aSewingTool.SewedShape();
if (theShape.IsNull())
{
theShape = aComp;
}
theShape = aResult;
return Standard_True;
}