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Patch from MIV: Modification of the deflection computing mechanism.

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This commit is contained in:
rnv 2011-03-04 07:36:14 +00:00
parent c22f737856
commit 242c40379f
2 changed files with 110 additions and 11 deletions
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115
src/OBJECT/GEOM_Actor.cxx
View File

@ -39,8 +39,6 @@
#include "GEOM_ShadingFace.h"
#include "SVTK_Actor.h"
#include <OCC2VTK_Tools.h>
#include <vtkObjectFactory.h>
#include <vtkRenderer.h>
#include <vtkProperty.h>
@ -49,8 +47,14 @@
#include <TopAbs_ShapeEnum.hxx>
#include <TopExp_Explorer.hxx>
#include <Poly_Triangulation.hxx>
#include <BRepMesh_IncrementalMesh.hxx>
#include <Bnd_Box.hxx>
#include <TopoDS.hxx>
#include <BRep_Tool.hxx>
#include <BRepBndLib.hxx>
#include <TopTools_ListOfShape.hxx>
#include <TopoDS_Iterator.hxx>
#include <TopExp.hxx>
#include <vtkPolyDataWriter.h>
@ -102,7 +106,10 @@ GEOM_Actor::GEOM_Actor():
myHighlightProp(vtkProperty::New()),
myPreHighlightProp(vtkProperty::New()),
myShadingFaceProp(vtkProperty::New()),
isOnlyVertex(false)
isOnlyVertex(false),
// Making deflection relative similarly to GEOM_AISShape
myDeflection( .001 ),
myIsRelative( true )
{
#ifdef MYDEBUG
MESSAGE (this<< " GEOM_Actor::GEOM_Actor");
@ -174,7 +181,6 @@ GEOM_Actor::GEOM_Actor():
// Toggle display mode
setDisplayMode(0); // WIRE FRAME
SetVectorMode(0); //
}
@ -351,6 +357,39 @@ GEOM_Actor
return myVectorMode;
}
static
void
MeshShape(const TopoDS_Shape& theShape,
float& theDeflection,
bool theIsRelative)
{
static Standard_Real RELATIVE_DEFLECTION = 0.0001;
Standard_Real aDeflection = theDeflection <= 0 ? RELATIVE_DEFLECTION : theDeflection;
// theDeflection <= 0 -> Compute default theDeflection
// Otherwise compute the absolute deflection on the basis of relative
if(theDeflection <= 0 || theIsRelative ){
Bnd_Box B;
BRepBndLib::Add(theShape, B);
if(!B.IsVoid()){
Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax;
B.Get(aXmin, aYmin, aZmin, aXmax, aYmax, aZmax);
// This magic line comes from Prs3d_ShadedShape.gxx in OCCT
aDeflection = std::max( aXmax-aXmin , std::max(aYmax-aYmin , aZmax-aZmin))
*aDeflection*4;
}
else
// Just to assign some value, because a void bnd box is not a good case
aDeflection = RELATIVE_DEFLECTION;
if(theDeflection <= 0)
theDeflection = theIsRelative ? RELATIVE_DEFLECTION : aDeflection;
}
BRepMesh_IncrementalMesh aMesh(theShape,aDeflection);
}
void
GEOM_Actor::
SetDeflection(float theDeflection, bool theIsRelative)
@ -358,7 +397,7 @@ SetDeflection(float theDeflection, bool theIsRelative)
myDeflection = theDeflection;
myIsRelative = theIsRelative;
GEOM::MeshShape2(myShape,myDeflection,myIsRelative);
MeshShape(myShape,myDeflection,myIsRelative);
SetModified();
}
@ -389,12 +428,7 @@ void GEOM_Actor::SetShape (const TopoDS_Shape& theShape,
TopTools_IndexedDataMapOfShapeListOfShape anEdgeMap;
TopExp::MapShapesAndAncestors(theShape,TopAbs_EDGE,TopAbs_FACE,anEdgeMap);
GEOM::SetShape(theShape,anEdgeMap,theIsVector,
myIsolatedEdgeSource.Get(),
myOneFaceEdgeSource.Get(),
mySharedEdgeSource.Get(),
myWireframeFaceSource.Get(),
myShadingFaceSource.Get());
SetShape(theShape,anEdgeMap,theIsVector);
isOnlyVertex =
myIsolatedEdgeSource->IsEmpty() &&
myOneFaceEdgeSource->IsEmpty() &&
@ -409,6 +443,65 @@ void GEOM_Actor::SetShape (const TopoDS_Shape& theShape,
}
}
void GEOM_Actor::SetShape (const TopoDS_Shape& theShape,
const TopTools_IndexedDataMapOfShapeListOfShape& theEdgeMap,
bool theIsVector)
{
if (theShape.ShapeType() == TopAbs_COMPOUND) {
TopoDS_Iterator anItr(theShape);
for (; anItr.More(); anItr.Next()) {
SetShape(anItr.Value(),theEdgeMap,theIsVector);
}
}
switch (theShape.ShapeType()) {
case TopAbs_WIRE: {
TopExp_Explorer anEdgeExp(theShape,TopAbs_EDGE);
for (; anEdgeExp.More(); anEdgeExp.Next()){
const TopoDS_Edge& anEdge = TopoDS::Edge(anEdgeExp.Current());
if (!BRep_Tool::Degenerated(anEdge))
myIsolatedEdgeSource->AddEdge(anEdge,theIsVector);
}
break;
}
case TopAbs_EDGE: {
const TopoDS_Edge& anEdge = TopoDS::Edge(theShape);
if (!BRep_Tool::Degenerated(anEdge))
myIsolatedEdgeSource->AddEdge(anEdge,theIsVector);
break;
}
case TopAbs_VERTEX: {
break;
}
default: {
TopExp_Explorer aFaceExp (theShape,TopAbs_FACE);
for(; aFaceExp.More(); aFaceExp.Next()) {
const TopoDS_Face& aFace = TopoDS::Face(aFaceExp.Current());
myWireframeFaceSource->AddFace(aFace);
myShadingFaceSource->AddFace(aFace);
TopExp_Explorer anEdgeExp(aFaceExp.Current(), TopAbs_EDGE);
for(; anEdgeExp.More(); anEdgeExp.Next()) {
const TopoDS_Edge& anEdge = TopoDS::Edge(anEdgeExp.Current());
if(!BRep_Tool::Degenerated(anEdge)){
// compute the number of faces
int aNbOfFaces = theEdgeMap.FindFromKey(anEdge).Extent();
switch(aNbOfFaces){
case 0: // isolated edge
myIsolatedEdgeSource->AddEdge(anEdge,theIsVector);
break;
case 1: // edge in only one face
myOneFaceEdgeSource->AddEdge(anEdge,theIsVector);
break;
default: // edge shared by at least two faces
mySharedEdgeSource->AddEdge(anEdge,theIsVector);
}
}
}
}
}
}
}
// OLD METHODS
void GEOM_Actor::setDeflection(double adef) {
#ifdef MYDEBUG

6
src/OBJECT/GEOM_Actor.h
View File

@ -56,6 +56,8 @@ class vtkRenderer;
class vtkAppendPolyData;
typedef GEOM_SmartPtr<vtkAppendPolyData> PAppendFilter;
class TopTools_IndexedDataMapOfShapeListOfShape;
class GEOM_OBJECT_EXPORT GEOM_Actor: public SALOME_Actor
{
public:
@ -67,6 +69,10 @@ public:
bool theIsRelative,
bool theIsVector = false);
void SetShape (const TopoDS_Shape& theShape,
const TopTools_IndexedDataMapOfShapeListOfShape& theEdgeMap,
bool theIsVector);
void SetDeflection(float theDeflection, bool theIsRelative);
float GetDeflection() const{ return myDeflection;}
bool GetIsRelative() const{ return myIsRelative;}