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1 | // Created on: 1999-05-13 |
2 | // Created by: data exchange team |
3 | // Copyright (c) 1999-1999 Matra Datavision |
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4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | // |
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6 | // This file is part of Open CASCADE Technology software library. |
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7 | // |
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8 | // This library is free software; you can redistribute it and/or modify it under |
9 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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10 | // by the Free Software Foundation, with special exception defined in the file |
11 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
12 | // distribution for complete text of the license and disclaimer of any warranty. |
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13 | // |
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14 | // Alternatively, this file may be used under the terms of Open CASCADE |
15 | // commercial license or contractual agreement. |
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16 | |
17 | #include <ShapeUpgrade_ConvertCurve3dToBezier.ixx> |
18 | #include <Precision.hxx> |
19 | #include <Geom_TrimmedCurve.hxx> |
20 | #include <Geom_BezierCurve.hxx> |
21 | #include <ShapeExtend.hxx> |
22 | #include <Geom_Line.hxx> |
23 | #include <TColgp_Array1OfPnt.hxx> |
24 | #include <Geom_BSplineCurve.hxx> |
25 | #include <Geom_Conic.hxx> |
26 | #include <GeomConvert_ApproxCurve.hxx> |
27 | #include <GeomConvert.hxx> |
28 | #include <GeomConvert_BSplineCurveToBezierCurve.hxx> |
29 | #include <TColStd_Array1OfReal.hxx> |
30 | #include <TColGeom_HArray1OfCurve.hxx> |
31 | #include <Geom_Circle.hxx> |
32 | |
33 | ShapeUpgrade_ConvertCurve3dToBezier::ShapeUpgrade_ConvertCurve3dToBezier() |
34 | { |
35 | mySegments = new TColGeom_HSequenceOfCurve; |
36 | mySplitParams = new TColStd_HSequenceOfReal; |
37 | myLineMode = Standard_True; |
38 | myCircleMode = Standard_True; |
39 | myConicMode = Standard_True; |
40 | } |
41 | |
42 | //======================================================================= |
43 | //function : Compute |
44 | //purpose : |
45 | //======================================================================= |
46 | |
47 | void ShapeUpgrade_ConvertCurve3dToBezier::Compute() |
48 | { |
49 | mySegments->Clear(); |
50 | mySplitParams->Clear(); |
51 | Standard_Real precision = Precision::PConfusion(); |
52 | Standard_Real First = mySplitValues->Value(1); |
53 | Standard_Real Last = mySplitValues->Value(mySplitValues->Length()); |
54 | if(myCurve->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))) { |
55 | Handle(Geom_TrimmedCurve) tmp = Handle(Geom_TrimmedCurve)::DownCast (myCurve); |
56 | Handle(Geom_Curve) BasCurve = tmp->BasisCurve(); |
57 | ShapeUpgrade_ConvertCurve3dToBezier converter; |
58 | converter.Init(BasCurve,First,Last); |
59 | converter.SetSplitValues(mySplitValues); |
60 | converter.Compute(); |
61 | mySplitValues->ChangeSequence() = converter.SplitValues()->Sequence(); |
62 | myNbCurves = mySplitValues->Length()-1; |
63 | myStatus |= converter.myStatus; |
64 | mySegments->ChangeSequence() = converter.Segments()->Sequence(); |
65 | mySplitParams->ChangeSequence() = converter.SplitParams()->Sequence(); |
66 | return; |
67 | } |
68 | else if(myCurve->IsKind(STANDARD_TYPE(Geom_BezierCurve))) { |
69 | Handle(Geom_BezierCurve) bezier = Handle(Geom_BezierCurve)::DownCast (myCurve); |
70 | myNbCurves = mySplitValues->Length()-1; |
71 | mySplitParams->Append(First); |
72 | mySplitParams->Append(Last); |
73 | if(First < precision && Last > 1 - precision) { |
74 | mySegments->Append(bezier); |
75 | myStatus = ShapeExtend::EncodeStatus (ShapeExtend_OK); |
76 | } else { |
77 | Handle(Geom_BezierCurve) besNew = Handle(Geom_BezierCurve)::DownCast(bezier->Copy()); |
78 | besNew->Segment(First,Last); |
79 | mySegments->Append(besNew); |
80 | myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE2); |
81 | } |
82 | return; |
83 | } |
84 | else if(myCurve->IsKind(STANDARD_TYPE(Geom_Line))) { |
85 | Handle(Geom_Line) aLine = Handle(Geom_Line)::DownCast(myCurve); |
86 | myNbCurves = mySplitValues->Length()-1; |
87 | mySplitParams->Append(First); |
88 | mySplitParams->Append(Last); |
89 | if(!myLineMode) { |
90 | mySegments->Append(aLine); |
91 | myStatus = ShapeExtend::EncodeStatus (ShapeExtend_OK); |
92 | return; |
93 | } |
94 | TColgp_Array1OfPnt poles(1,2); |
95 | poles(1) = aLine->Value(First); |
96 | poles(2) = aLine->Value(Last); |
97 | Handle(Geom_BezierCurve) bezier = new Geom_BezierCurve(poles); |
98 | mySegments->Append(bezier); |
99 | myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1); |
100 | return; |
101 | } |
102 | else if((myCurve->IsKind(STANDARD_TYPE(Geom_Conic))&&!myConicMode)|| |
103 | (myCurve->IsKind(STANDARD_TYPE(Geom_Circle))&&!myCircleMode)) { |
104 | myNbCurves = mySplitValues->Length()-1; |
105 | mySplitParams->Append(First); |
106 | mySplitParams->Append(Last); |
107 | mySegments->Append(myCurve); |
108 | myStatus = ShapeExtend::EncodeStatus (ShapeExtend_OK); |
109 | return; |
110 | } |
111 | else { |
112 | Handle(Geom_BSplineCurve) aBSpline; |
113 | Standard_Real Shift = 0.; |
114 | if(myCurve->IsKind(STANDARD_TYPE(Geom_Conic))) { |
115 | Handle(Geom_TrimmedCurve) tcurve = new Geom_TrimmedCurve(myCurve,First,Last); //protection agains parabols ets |
116 | GeomConvert_ApproxCurve approx (tcurve, Precision::Approximation(), |
117 | GeomAbs_C1, 100, 6 ); |
118 | if ( approx.HasResult() ) |
119 | aBSpline = Handle(Geom_BSplineCurve)::DownCast(approx.Curve()); |
120 | else { |
121 | Handle(Geom_TrimmedCurve) t3d = new Geom_TrimmedCurve(myCurve,First,Last); |
122 | aBSpline = GeomConvert::CurveToBSplineCurve(t3d,Convert_QuasiAngular); |
123 | } |
124 | Shift = First - aBSpline->FirstParameter(); |
125 | First = aBSpline->FirstParameter(); |
126 | Last = aBSpline->LastParameter(); |
127 | } |
128 | else if(!myCurve->IsKind(STANDARD_TYPE(Geom_BSplineCurve))) { |
129 | aBSpline = GeomConvert::CurveToBSplineCurve(myCurve,Convert_QuasiAngular); |
130 | } |
131 | else |
132 | aBSpline = Handle(Geom_BSplineCurve)::DownCast(myCurve); |
133 | |
134 | Standard_Real bf = aBSpline->FirstParameter(); |
135 | Standard_Real bl = aBSpline->LastParameter(); |
136 | if(Abs(First-bf) < precision) |
137 | First = bf; |
138 | if(Abs(Last-bl) < precision) |
139 | Last = bl; |
140 | if(First < bf){ |
141 | #ifdef DEB |
142 | cout <<"Warning: The range of the edge exceeds the curve domain" <<endl; |
143 | #endif |
144 | First = bf; |
145 | mySplitValues->SetValue(1,First); |
146 | } |
147 | if(Last > bl){ |
148 | #ifdef DEB |
149 | cout <<"Warning: The range of the edge exceeds the curve domain" <<endl; |
150 | #endif |
151 | Last = bl; |
152 | mySplitValues->SetValue(mySplitValues->Length(),Last); |
153 | } |
154 | |
155 | GeomConvert_BSplineCurveToBezierCurve tool(aBSpline,First,Last,precision); |
156 | Standard_Integer nbArcs = tool.NbArcs(); |
157 | TColStd_Array1OfReal knots(1,nbArcs+1); |
158 | tool.Knots(knots); |
159 | mySplitParams->Append(First+Shift); |
160 | Standard_Integer j; // svv Jan 10 2000 : porting on DEC |
161 | for(j = 1; j <=nbArcs; j++) { |
162 | Standard_Real nextKnot = knots(j+1)+Shift; |
163 | if(nextKnot - mySplitParams->Value(mySplitParams->Length()) > precision) { |
164 | mySegments->Append(tool.Arc(j)); |
165 | mySplitParams->Append(knots(j+1)+Shift); |
166 | } |
167 | } |
168 | |
169 | First = mySplitValues->Value(1); |
170 | for(j = 2; j <= mySplitValues->Length(); j++) { |
171 | Last = mySplitValues->Value(j); |
172 | for(Standard_Integer i = 2; i <= nbArcs+1; i++) { |
173 | Standard_Real valknot = knots(i)+Shift; |
174 | if(valknot <= First + precision) continue; |
175 | if(valknot >= Last - precision) break; |
176 | mySplitValues->InsertBefore(j++,valknot); |
177 | } |
178 | First = Last; |
179 | } |
180 | myNbCurves = mySplitValues->Length()-1; |
181 | } |
182 | myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1); |
183 | } |
184 | |
185 | //======================================================================= |
186 | //function : Build |
187 | //purpose : |
188 | //======================================================================= |
189 | |
190 | void ShapeUpgrade_ConvertCurve3dToBezier::Build(const Standard_Boolean /*Segment*/) |
191 | { |
192 | Standard_Real prec = Precision::PConfusion(); |
193 | Standard_Integer nb = mySplitValues->Length(); |
194 | myResultingCurves = new TColGeom_HArray1OfCurve (1,nb-1); |
195 | Standard_Real prevPar = 0.; |
196 | Standard_Integer j=2; |
197 | for(Standard_Integer i = 2; i <= nb; i++) { |
198 | Standard_Real par = mySplitValues->Value(i); |
199 | for(; j<= mySplitParams->Length(); j++) |
200 | if(mySplitParams->Value(j)+prec > par) |
201 | break; |
202 | else |
203 | prevPar = 0.; |
204 | |
205 | Handle(Geom_Curve) crv = Handle(Geom_Curve)::DownCast(mySegments->Value(j-1)->Copy()); |
206 | if(crv->IsKind(STANDARD_TYPE(Geom_BezierCurve))) { |
207 | Handle(Geom_BezierCurve) bes = Handle(Geom_BezierCurve)::DownCast(crv); |
208 | Standard_Real uFact = mySplitParams->Value(j) - mySplitParams->Value(j-1); |
209 | Standard_Real pp = mySplitValues->Value(i-1); |
210 | Standard_Real length = (par - pp)/uFact; |
211 | bes->Segment(prevPar, prevPar+length); |
212 | prevPar += length; |
213 | myResultingCurves->SetValue(i-1,bes); |
214 | } |
215 | else |
216 | myResultingCurves->SetValue(i-1,crv); |
217 | } |
218 | } |
219 | |
220 | //======================================================================= |
221 | //function : Segments |
222 | //purpose : |
223 | //======================================================================= |
224 | |
225 | Handle(TColGeom_HSequenceOfCurve) ShapeUpgrade_ConvertCurve3dToBezier::Segments() const |
226 | { |
227 | return mySegments; |
228 | } |
229 | |
230 | //======================================================================= |
231 | //function : SplitParams |
232 | //purpose : |
233 | //======================================================================= |
234 | |
235 | Handle(TColStd_HSequenceOfReal) ShapeUpgrade_ConvertCurve3dToBezier::SplitParams() const |
236 | { |
237 | return mySplitParams; |
238 | } |