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0023022: This is desirable to access OpenGl extensions and core API (1.2+) in one...
[occt.git] / src / ShapeCustom / ShapeCustom_DirectModification.cxx
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7fd59977 1//:l8 abv 15.01.99: CTS22022: writing correct pcurves for indirect tori
2//:p5 abv 26.02.99: PRO18207: force copying of edge if any its pcurve is to be replaced
3//szv#4 S4163
4//S4181 pdn 20.04.99 Modification of indirect rectangular trimming surfaces and taking
5// locations into account
6//szv 03.01.01 PositiveCones merged in
7#include <ShapeCustom_DirectModification.ixx>
8
9#include <gp_Mat.hxx>
10#include <Geom_ConicalSurface.hxx>
11#include <Geom_ElementarySurface.hxx>
12#include <Geom_RectangularTrimmedSurface.hxx>
13
14#include <Precision.hxx>
15#include <TopoDS.hxx>
16#include <BRep_Builder.hxx>
17#include <BRep_Tool.hxx>
18#include <BRepTools.hxx>
19#include <BRep_TEdge.hxx>
20#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
21#include <BRep_GCurve.hxx>
22
23//=======================================================================
24//function : ShapeCustom_DirectModification
25//purpose :
26//=======================================================================
27
28ShapeCustom_DirectModification::ShapeCustom_DirectModification()
29{
30}
31
32//S4181 returns 0 - none, 1 - indirect, 2 - negative cone, 3 - indirect negative cone
33static Standard_Integer IsIndirectSurface (Handle(Geom_Surface) &S,
34 TopLoc_Location &L)
35{
36 Standard_Integer result = 0;
37
38 Handle(Geom_Surface) TS = S;
39 while (TS->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface)))
40 TS = Handle(Geom_RectangularTrimmedSurface)::DownCast(TS)->BasisSurface();
41
42 Handle(Geom_ElementarySurface) ES = Handle(Geom_ElementarySurface)::DownCast(TS);
43 if (!ES.IsNull()) {
44 // is the surface indirect ?
45 gp_Trsf t = L.Transformation();
46 Standard_Boolean neg = t.IsNegative();
47 Standard_Boolean det = ( t.VectorialPart().Determinant() < 0.0 );
48 Standard_Boolean dir = ES->Position().Direct();
49 if ( (Standard_Boolean)( neg != det ) == dir ) result = 1;
50 Handle(Geom_ConicalSurface) CS = Handle(Geom_ConicalSurface)::DownCast(ES);
51 if (!CS.IsNull()) {
52 // does the cone have negative semiangle ?
53 if ( CS->SemiAngle() < 0.0 ) result += 2;
54 }
55 if (result) S = TS;
56 }
57
58 return result;
59}
60
61//=======================================================================
62//function : NewSurface
63//purpose :
64//=======================================================================
65
66Standard_Boolean ShapeCustom_DirectModification::NewSurface (const TopoDS_Face& F,
67 Handle(Geom_Surface)& S,
68 TopLoc_Location& L,
69 Standard_Real& Tol,
70 Standard_Boolean& RevWires,
71 Standard_Boolean& RevFace)
72{
73 S = BRep_Tool::Surface(F,L);
74
75 switch (IsIndirectSurface(S,L)) {
76 case 1: { // Indirect surface
77 // UReverse a copy of S
78 S = S->UReversed();
79 RevWires = Standard_True;
80 RevFace = Standard_True;
81 break;
82 }
83 case 2: { // Negative cone
84 // U- and VReverse a copy of S
85 S = S->VReversed();
86 S->UReverse();
87 RevWires = Standard_False;
88 RevFace = Standard_False;
89 break;
90 }
91 case 3: { // Indirect negative cone
92 // VReverse a copy of S
93 S = S->VReversed();
94 RevWires = Standard_True;
95 RevFace = Standard_True;
96 break;
97 }
98 default: return Standard_False;
99 }
100
101 Tol = BRep_Tool::Tolerance(F);
102
103 return Standard_True;
104}
105
106//=======================================================================
107//function : NewCurve
108//purpose :
109//=======================================================================
110
111Standard_Boolean ShapeCustom_DirectModification::NewCurve (const TopoDS_Edge& E,
112 Handle(Geom_Curve)& C,
113 TopLoc_Location& L,
114 Standard_Real& Tol)
115{
116 //:p5 abv 26 Feb 99: force copying of edge if any its pcurve will be replaced
117 Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*)&E.TShape());
118
119 // iterate on pcurves
120 BRep_ListIteratorOfListOfCurveRepresentation itcr(TE->Curves());
121 for ( ; itcr.More(); itcr.Next() ) {
122 Handle(BRep_GCurve) GC = Handle(BRep_GCurve)::DownCast(itcr.Value());
123 if ( GC.IsNull() || ! GC->IsCurveOnSurface() ) continue;
124 Handle(Geom_Surface) S = GC->Surface();
125 TopLoc_Location Loc = GC->Location();
126 if ( ! IsIndirectSurface ( S, Loc ) ) continue;
127 Standard_Real f, l;
128 C = BRep_Tool::Curve ( E, L, f, l );
129 if ( ! C.IsNull() ) C = Handle(Geom_Curve)::DownCast ( C->Copy() );
130 Tol = BRep_Tool::Tolerance(E);
131 return Standard_True;
132 }
133 return Standard_False;
134}
135
136//=======================================================================
137//function : NewPoint
138//purpose :
139//=======================================================================
140
141Standard_Boolean ShapeCustom_DirectModification::NewPoint (const TopoDS_Vertex& /*V*/,
142 gp_Pnt& /*P*/,
143 Standard_Real& /*Tol*/)
144{
145 // 3d points are never modified
146 return Standard_False;
147}
148
149//=======================================================================
150//function : NewCurve2d
151//purpose :
152//=======================================================================
153
154Standard_Boolean ShapeCustom_DirectModification::NewCurve2d (const TopoDS_Edge& E,
155 const TopoDS_Face& F,
156 const TopoDS_Edge& NewE,
157 const TopoDS_Face& NewF,
158 Handle(Geom2d_Curve)& C,
159 Standard_Real& Tol)
160{
161 TopLoc_Location L;
162 Handle(Geom_Surface) S = BRep_Tool::Surface(F,L);
163
164 Standard_Integer result = IsIndirectSurface ( S, L );
165 if ( !result && E.IsSame(NewE) ) return Standard_False;
166
167 Standard_Real f, l;
168 C = BRep_Tool::CurveOnSurface( E, F, f, l );
169 Tol = BRep_Tool::Tolerance(E);
170
171 if ( result ) {
172
173 gp_Trsf2d T;
174
175 switch (result) {
176 case 1: { // Indirect surface
177 // mirror the PCurve about the V axis
178 T.SetMirror(gp::OY2d());
179 C = Handle(Geom2d_Curve)::DownCast(C->Transformed(T));
180 break;
181 }
182 case 2: { // Negative cone
183 // mirror the PCurve about the U and V axis
184 T.SetMirror(gp::OX2d());
185 C = Handle(Geom2d_Curve)::DownCast(C->Transformed(T));
186 T.SetMirror(gp::OY2d());
187 C->Transform(T);
188 break;
189 }
190 case 3: { // Indirect negative cone
191 // mirror the PCurve about the U axis
192 T.SetMirror(gp::OX2d());
193 C = Handle(Geom2d_Curve)::DownCast(C->Transformed(T));
194 break;
195 }
196 }
197
198 //#26 rln When seam edge contains triangulations trimming is lost by BRep_Builder::UpdateEdge
199 if (BRepTools::IsReallyClosed (E, F)) {
200 //szv#4:S4163:12Mar99 SGI warning
201 TopoDS_Shape sh = NewE.Reversed();
202 Handle(Geom2d_Curve) tmp = BRep_Tool::CurveOnSurface( TopoDS::Edge(sh), NewF, f, l );
203 if (tmp.IsNull()) {
204 tmp = BRep_Tool::CurveOnSurface (E, F, f, l);
205 BRep_Builder B;
206 B.UpdateEdge (NewE, tmp, C, NewF, Tol);
207 B.Range (NewE, NewF, f, l);
208 //anyway, tmp will be removed later by BRepTools_Modifier
209 }
210 }
211 }
212 else {
213 //:p5 abv 26 Feb 99: force copying of pcurves if edge was copied
214 if ( ! C.IsNull() ) C = Handle(Geom2d_Curve)::DownCast ( C->Copy() );
215 }
216
217 return Standard_True;
218}
219
220//=======================================================================
221//function : NewParameter
222//purpose :
223//=======================================================================
224
225Standard_Boolean ShapeCustom_DirectModification::NewParameter (const TopoDS_Vertex& /*V*/,
226 const TopoDS_Edge& /*E*/,
227 Standard_Real& /*P*/,
228 Standard_Real& /*Tol*/)
229{
230 return Standard_False;
231}
232
233//=======================================================================
234//function : Continuity
235//purpose :
236//=======================================================================
237
238GeomAbs_Shape ShapeCustom_DirectModification::Continuity (const TopoDS_Edge& E,
239 const TopoDS_Face& F1,
240 const TopoDS_Face& F2,
241 const TopoDS_Edge& /*NewE*/,
242 const TopoDS_Face& /*NewF1*/,
243 const TopoDS_Face& /*NewF2*/)
244{
245 return BRep_Tool::Continuity(E,F1,F2);
246}
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