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// File: StdPrs_ShadedSurface.cxx
// Created: Thu Jul 27 11:44:57 1995
// Author: Modelistation
// <model@metrox>
#define G005 //ATS,GG 04/01/01 Use PrimitiveArray instead Sets of primitives
// for performance improvment
#include <StdPrs_ShadedSurface.ixx>
#include <Graphic3d_Group.hxx>
#include <Graphic3d_Vertex.hxx>
#include <Graphic3d_VertexN.hxx>
#include <Graphic3d_Array1OfVertexN.hxx>
#include <gp_Vec.hxx>
#include <Prs3d_ShadingAspect.hxx>
#include <Prs3d_IsoAspect.hxx>
#include <Graphic3d_AspectFillArea3d.hxx>
#include <Precision.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <gp_Pnt.hxx>
#ifdef G005
#include <Graphic3d_ArrayOfTriangleStrips.hxx>
#endif
//=======================================================================
//function : Add
//purpose :
//=======================================================================
void StdPrs_ShadedSurface::Add(const Handle(Prs3d_Presentation)& aPresentation,
const Adaptor3d_Surface& aSurface,
const Handle(Prs3d_Drawer)& aDrawer)
{
Standard_Integer N1 = aDrawer->UIsoAspect()->Number();
Standard_Integer N2 = aDrawer->VIsoAspect()->Number();
N1 = N1 < 3 ? 3 : N1;
N2 = N2 < 3 ? 3 : N2;
if ( ! aDrawer->ShadingAspectGlobal() ) {
// If the surface is closed, the faces from back-side are not traced:
Handle(Graphic3d_AspectFillArea3d) Asp = aDrawer->ShadingAspect()->Aspect();
if(aSurface.IsUClosed() && aSurface.IsVClosed()) {
Asp->SuppressBackFace();
} else {
Asp->AllowBackFace();
}
Prs3d_Root::CurrentGroup(aPresentation)->SetPrimitivesAspect(Asp);
}
Standard_Integer NBUintv = aSurface.NbUIntervals(GeomAbs_C1);
Standard_Integer NBVintv = aSurface.NbVIntervals(GeomAbs_C1);
TColStd_Array1OfReal InterU(1, NBUintv+1);
TColStd_Array1OfReal InterV(1, NBVintv+1);
aSurface.UIntervals(InterU, GeomAbs_C1);
aSurface.VIntervals(InterV, GeomAbs_C1);
Standard_Real U1, U2, V1, V2, DU, DV;
Standard_Integer i,j;
gp_Pnt P1,P2;
gp_Vec D1U,D1V,D1,D2;
#ifdef G005
if( Graphic3d_ArrayOfPrimitives::IsEnable() ) {
Prs3d_Root::CurrentGroup(aPresentation)->BeginPrimitives();
for (Standard_Integer NU = 1; NU <= NBUintv; NU++) {
for (Standard_Integer NV = 1; NV <= NBVintv; NV++) {
U1 = InterU(NU); U2 = InterU(NU+1);
V1 = InterV(NV); V2 = InterV(NV+1);
U1 = (Precision::IsNegativeInfinite(U1)) ? - aDrawer->MaximalParameterValue() : U1;
U2 = (Precision::IsPositiveInfinite(U2)) ? aDrawer->MaximalParameterValue() : U2;
V1 = (Precision::IsNegativeInfinite(V1)) ? - aDrawer->MaximalParameterValue() : V1;
V2 = (Precision::IsPositiveInfinite(V2)) ? aDrawer->MaximalParameterValue() : V2;
DU = (U2-U1)/ N1;
DV = (V2-V1)/ N2;
Handle(Graphic3d_ArrayOfTriangleStrips) parray = new
Graphic3d_ArrayOfTriangleStrips(2*(N1+1)*(N2+1),N1+1,
Standard_True,Standard_False,Standard_False,Standard_False);
for ( i = 1; i<= N1+1; i++) {
parray->AddBound(N2+1);
for (j = 1; j <= N2+1; j++) {
aSurface.D1(U1 + DU * (i-1), V1 + DV * (j-1),P2,D1U,D1V);
D1 = D1U^D1V;
D1.Normalize();
aSurface.D1(U1 + DU * i, V1 + DV * (j-1),P2,D1U,D1V);
D2 = D1U^D1V;
D2.Normalize();
parray->AddVertex(P1,D1);
parray->AddVertex(P2,D2);
}
}
Prs3d_Root::CurrentGroup(aPresentation)->AddPrimitiveArray(parray);
}
Prs3d_Root::CurrentGroup(aPresentation)->EndPrimitives();
}
return;
}
#endif
gp_Pnt P;
gp_Vec Normale;
Quantity_Length x,y,z;
Graphic3d_Array1OfVertexN A1 ( 1 , N2+1);
Graphic3d_Array1OfVertexN A2 ( 1 , N2+1);
Graphic3d_Array1OfVertexN TriangleStrip ( 1, 2*(N2+1));
Prs3d_Root::CurrentGroup(aPresentation)->BeginPrimitives();
for (Standard_Integer NU = 1; NU <= NBUintv; NU++) {
for (Standard_Integer NV = 1; NV <= NBVintv; NV++) {
U1 = InterU(NU); U2 = InterU(NU+1);
V1 = InterV(NV); V2 = InterV(NV+1);
U1 = (Precision::IsNegativeInfinite(U1)) ? - aDrawer->MaximalParameterValue() : U1;
U2 = (Precision::IsPositiveInfinite(U2)) ? aDrawer->MaximalParameterValue() : U2;
V1 = (Precision::IsNegativeInfinite(V1)) ? - aDrawer->MaximalParameterValue() : V1;
V2 = (Precision::IsPositiveInfinite(V2)) ? aDrawer->MaximalParameterValue() : V2;
DU = (U2-U1)/ N1;
DV = (V2-V1)/ N2;
// Calculation of the first line;
for ( i = 1; i<= N2+1; i++) {
aSurface.D1(U1 , V1 + DV * (i-1),P,D1U,D1V);
P.Coord(x,y,z);
A1(i).SetCoord (x,y,z);
Normale = D1U^D1V;
Normale.Normalize();
Normale.Coord(x,y,z);
A1(i).SetNormal(x,y,z);
}
for ( i = 2; i<= N1+1; i++) {
for (j = 1; j <= N2+1; j++) {
aSurface.D1(U1 + DU * (i-1), V1 + DV * (j-1),
P,D1U,D1V);
P.Coord(x,y,z);
A2(j).SetCoord (x,y,z);
Normale = D1U^D1V;
Normale.Normalize();
Normale.Coord(x,y,z);
A2(j).SetNormal(x,y,z);
TriangleStrip (2*(j-1) + 1) = A1(j);
TriangleStrip (2*(j-1) + 2) = A2(j);
}
Prs3d_Root::CurrentGroup(aPresentation)->TriangleMesh(TriangleStrip);
for ( j = 1; j <= N2 + 1; j++) { A1(j) = A2(j);}
}
}
}
Prs3d_Root::CurrentGroup(aPresentation)->EndPrimitives();
}
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