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Copy pathMeshDataSource.cpp
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300 lines (287 loc) · 10.4 KB
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#include "MeshDataSource.h"
#include <vector>
#include <gp_Pnt.hxx>
#include <gp_Vec.hxx>
#include <Precision.hxx>
#include <Standard_Type.hxx>
#include <TColgp_SequenceOfXYZ.hxx>
#include <TColStd_DataMapOfIntegerInteger.hxx>
#include <TColStd_DataMapOfIntegerReal.hxx>
IMPLEMENT_STANDARD_RTTIEXT(MeshDS_DataSource, MeshVS_DataSource)
MeshDS_DataSource::MeshDS_DataSource(std::vector<gp_Pnt>& CoordData, std::vector<std::vector<int>>& Ele2NodeData)
{
InitializeFromData(CoordData, Ele2NodeData);
}
MeshDS_DataSource::MeshDS_DataSource(const Handle(Poly_Triangulation)& polyTri)
{
// initialize arrays
std::vector<gp_Pnt> CoordData;
std::vector<std::vector<int>> Ele2NodeData;
CoordData.resize(polyTri->NbNodes());
Ele2NodeData.resize(polyTri->NbTriangles());
//convert node data
const TColgp_Array1OfPnt& nodes = polyTri->Nodes();
for (Standard_Integer nodeId = nodes.Lower(); nodeId <= nodes.Upper(); nodeId++) {
const gp_Pnt& node = nodes.Value(nodeId);
CoordData[nodeId - nodes.Lower()] = node;
}
// convert triangle data
const Poly_Array1OfTriangle& triangles = polyTri->Triangles();
for (Standard_Integer ElementID = triangles.Lower(); ElementID <= triangles.Upper(); ElementID++) {
const Poly_Triangle& tri = triangles.Value(ElementID);
Ele2NodeData[ElementID - triangles.Lower()] = std::vector<int>{ tri(1) - nodes.Lower(), tri(2) - nodes.Lower(), tri(3) - nodes.Lower() };
}
InitializeFromData(CoordData, Ele2NodeData);
}
//================================================================
// Function : SetElemNormals
// Purpose :
//================================================================
void MeshDS_DataSource::SetElemNormals
(std::vector<gp_Vec>& ElemNormalsData)
{
for (size_t ElementId = 1; ElementId <= ElemNormalsData.size(); ElementId++)
{
myElemNormals->SetValue(ElementId, 1, ElemNormalsData[ElementId - 1].X());
myElemNormals->SetValue(ElementId, 2, ElemNormalsData[ElementId - 1].Y());
myElemNormals->SetValue(ElementId, 3, ElemNormalsData[ElementId - 1].Z());
}
}
//================================================================
// Function : SetNodeNormals
// Purpose :
//================================================================
void MeshDS_DataSource::SetNodeNormals
(std::vector<std::vector<gp_Vec>>& NodeNormalsData)
{
for (size_t ElementId = 1; ElementId <= myElemNodes->NbRows(); ElementId++)
{
for (Standard_Integer rankNode = 1; rankNode <= myElemNumberNodes->Value(ElementId); rankNode++) {
myNodeNormals->SetValue(ElementId, 3 * (rankNode - 1) + 1, NodeNormalsData[ElementId - 1][rankNode - 1].X());
myNodeNormals->SetValue(ElementId, 3 * (rankNode - 1) + 2, NodeNormalsData[ElementId - 1][rankNode - 1].Y());
myNodeNormals->SetValue(ElementId, 3 * (rankNode - 1) + 3, NodeNormalsData[ElementId - 1][rankNode - 1].Z());
}
}
}
//================================================================
// Function : GetGeom
// Purpose :
//================================================================
Standard_Boolean MeshDS_DataSource::GetGeom
(const Standard_Integer ID, const Standard_Boolean IsElement,
TColStd_Array1OfReal& Coords, Standard_Integer& NbNodes,
MeshVS_EntityType& Type) const
{
if (IsElement)
{
if (ID >= 1 && ID <= myElements.Extent())
{
Type = MeshVS_ET_Face;
NbNodes = myElemNumberNodes->Value(ID);
for (Standard_Integer i = 1, k = 1; i <= NbNodes; i++)
{
Standard_Integer IdxNode = myElemNodes->Value(ID, i);
for (Standard_Integer j = 1; j <= 3; j++, k++)
Coords(k) = myNodeCoords->Value(IdxNode, j);
}
return Standard_True;
}
else
return Standard_False;
}
else
if (ID >= 1 && ID <= myNodes.Extent())
{
Type = MeshVS_ET_Node;
NbNodes = 1;
Coords(1) = myNodeCoords->Value(ID, 1);
Coords(2) = myNodeCoords->Value(ID, 2);
Coords(3) = myNodeCoords->Value(ID, 3);
return Standard_True;
}
else
return Standard_False;
}
//================================================================
// Function : GetGeomType
// Purpose :
//================================================================
Standard_Boolean MeshDS_DataSource::GetGeomType
(const Standard_Integer,
const Standard_Boolean IsElement,
MeshVS_EntityType& Type) const
{
if (IsElement)
{
Type = MeshVS_ET_Face;
return Standard_True;
}
else
{
Type = MeshVS_ET_Node;
return Standard_True;
}
}
//================================================================
// Function : GetAddr
// Purpose :
//================================================================
Standard_Address MeshDS_DataSource::GetAddr
(const Standard_Integer, const Standard_Boolean) const
{
return NULL;
}
//================================================================
// Function : GetNodesByElement
// Purpose :
//================================================================
Standard_Boolean MeshDS_DataSource::GetNodesByElement
(const Standard_Integer ID,
TColStd_Array1OfInteger& theNodeIDs,
Standard_Integer& theNbNodes) const
{
if (ID >= 1 && ID <= myElements.Extent() && theNodeIDs.Length() >= 3)
{
Standard_Integer aLow = theNodeIDs.Lower();
theNbNodes = myElemNumberNodes->Value(ID);
for (Standard_Integer j = 1; j <= theNbNodes; j++)
{
theNodeIDs(aLow + j - 1) = myElemNodes->Value(ID, j);
}
return Standard_True;
}
return Standard_False;
}
//================================================================
// Function : GetAllNodes
// Purpose :
//================================================================
const TColStd_PackedMapOfInteger& MeshDS_DataSource::GetAllNodes() const
{
return myNodes;
}
//================================================================
// Function : GetAllElements
// Purpose :
//================================================================
const TColStd_PackedMapOfInteger& MeshDS_DataSource::GetAllElements() const
{
return myElements;
}
//================================================================
// Function : GetNormal
// Purpose :
//================================================================
Standard_Boolean MeshDS_DataSource::GetNormal
(const Standard_Integer Id, const Standard_Integer Max,
Standard_Real& nx, Standard_Real& ny, Standard_Real& nz) const
{
if (Id >= 1 && Id <= myElements.Extent() && Max >= 3)
{
nx = myElemNormals->Value(Id, 1);
ny = myElemNormals->Value(Id, 2);
nz = myElemNormals->Value(Id, 3);
return Standard_True;
}
else
return Standard_False;
}
//================================================================
// Function : GetNodeNormal
// Purpose :
//================================================================
Standard_Boolean MeshDS_DataSource::GetNodeNormal
(const Standard_Integer rankNode, const Standard_Integer ElementId,
Standard_Real& nx, Standard_Real& ny, Standard_Real& nz) const
{
if (ElementId >= 1 && ElementId <= myElements.Extent())
{
nx = myNodeNormals->Value(ElementId, 3 * (rankNode - 1) + 1);
ny = myNodeNormals->Value(ElementId, 3 * (rankNode - 1) + 2);
nz = myNodeNormals->Value(ElementId, 3 * (rankNode - 1) + 3);
return Standard_True;
}
else
return Standard_False;
}
//================================================================
// Function : InitializeFromData
// Purpose :
//================================================================
void MeshDS_DataSource::InitializeFromData
(std::vector<gp_Pnt>& CoordData, std::vector<std::vector<int>>& Ele2NodeData)
{
//initialize arrays
myNodeCoords = new TColStd_HArray2OfReal(1, CoordData.size(), 1, 3);
myElemNodes = new TColStd_HArray2OfInteger(1, Ele2NodeData.size(), 1, 4);
myElemNumberNodes = new TColStd_HArray1OfInteger(1, Ele2NodeData.size());
myElemNormals = new TColStd_HArray2OfReal(1, Ele2NodeData.size(), 1, 3);
myNodeNormals = new TColStd_HArray2OfReal(1, Ele2NodeData.size(), 1, 12);
// fill node ids and coordinates
for (size_t nodeId = 1; nodeId <= CoordData.size(); nodeId++)
{
myNodes.Add(nodeId);
myNodeCoords->SetValue(nodeId, 1, CoordData[nodeId - 1].X());
myNodeCoords->SetValue(nodeId, 2, CoordData[nodeId - 1].Y());
myNodeCoords->SetValue(nodeId, 3, CoordData[nodeId - 1].Z());
}
// fill element ids, number of nodes, associated node ids and normals
for (size_t ElementId = 1; ElementId <= Ele2NodeData.size(); ElementId++)
{
myElements.Add(ElementId);
myElemNumberNodes->SetValue(ElementId, std::min((size_t)4, Ele2NodeData[ElementId - 1].size()));
for (Standard_Integer rankNode = 1; rankNode <= myElemNumberNodes->Value(ElementId); rankNode++)
{
Standard_Integer nodeId = Ele2NodeData[ElementId - 1][rankNode - 1] + 1;
myElemNodes->SetValue(ElementId, rankNode, nodeId);
}
// compute face normal
const gp_Pnt aP1 = gp_Pnt(CoordData[Ele2NodeData[ElementId - 1][0]]);
const gp_Pnt aP2 = gp_Pnt(CoordData[Ele2NodeData[ElementId - 1][1]]);
const gp_Pnt aP3 = gp_Pnt(CoordData[Ele2NodeData[ElementId - 1][2]]);
gp_Vec aV1(aP1, aP2);
gp_Vec aV2(aP2, aP3);
gp_Vec aN = aV1.Crossed(aV2);
if (aN.SquareMagnitude() > Precision::SquareConfusion())
aN.Normalize();
else
aN.SetCoord(0.0, 0.0, 0.0);
myElemNormals->SetValue(ElementId, 1, aN.X());
myElemNormals->SetValue(ElementId, 2, aN.Y());
myElemNormals->SetValue(ElementId, 3, aN.Z());
}
// compute node normal
std::vector<std::vector<int>> Node2EleData;
Node2EleData.resize(CoordData.size());
for (size_t ElementId = 0; ElementId < Ele2NodeData.size(); ElementId++) {
for (size_t rankNode = 0; rankNode < Ele2NodeData[ElementId].size(); rankNode++) {
int nodeId = Ele2NodeData[ElementId][rankNode];
Node2EleData[nodeId].push_back(ElementId);
}
}
std::vector<gp_Vec> nodeNormals;
nodeNormals.resize(CoordData.size());
for (size_t nodeId = 0; nodeId < Node2EleData.size(); nodeId++) {
gp_Vec aN = gp_Vec(0, 0, 0);
for (size_t rankEle = 0; rankEle < Node2EleData[nodeId].size(); rankEle++) {
int ElementId = Node2EleData[nodeId][rankEle] + 1;
aN += gp_Vec(myElemNormals->Value(ElementId, 1), myElemNormals->Value(ElementId, 2), myElemNormals->Value(ElementId, 3));
}
if (aN.SquareMagnitude() > Precision::SquareConfusion())
aN.Normalize();
else
aN.SetCoord(0.0, 0.0, 0.0);
nodeNormals[nodeId] = aN;
}
for (size_t ElementId = 0; ElementId < Ele2NodeData.size(); ElementId++)
{
for (size_t rankNode = 0; rankNode < Ele2NodeData[ElementId].size(); rankNode++)
{
int nodeId = Ele2NodeData[ElementId][rankNode];
gp_Vec aN = nodeNormals[nodeId];
myNodeNormals->SetValue(ElementId + 1, 3 * rankNode + 1, aN.X());
myNodeNormals->SetValue(ElementId + 1, 3 * rankNode + 2, aN.Y());
myNodeNormals->SetValue(ElementId + 1, 3 * rankNode + 3, aN.Z());
}
}
}
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