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1 | -- Created on: 1993-02-22 |
| 2 | -- Created by: Modelistation |
| 3 | -- Copyright (c) 1993-1999 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 | class CurveOnSurface from Adaptor3d inherits Curve from Adaptor3d |
| 18 | |
| 19 | ---Purpose: An interface between the services provided by a curve |
| 20 | -- lying on a surface from the package Geom and those |
| 21 | -- required of the curve by algorithms which use it. The |
| 22 | -- curve is defined as a 2D curve from the Geom2d |
| 23 | -- package, in the parametric space of the surface. |
| 24 | |
| 25 | |
| 26 | uses |
| 27 | Array1OfReal from TColStd, |
| 28 | Pnt from gp, |
| 29 | Vec from gp, |
| 30 | Circ from gp, |
| 31 | Elips from gp, |
| 32 | Hypr from gp, |
| 33 | Parab from gp, |
| 34 | Lin from gp, |
| 35 | CurveType from GeomAbs, |
| 36 | Shape from GeomAbs, |
| 37 | BezierCurve from Geom, |
| 38 | BSplineCurve from Geom, |
| 39 | BSplineSurface from Geom, |
| 40 | HCurve from Adaptor3d, |
| 41 | HCurve2d from Adaptor2d, |
| 42 | HSurface from Adaptor3d, |
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43 | HSequenceOfReal from TColStd, |
| 44 | Pnt2d from gp, |
| 45 | Vec2d from gp |
| 46 | |
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47 | raises NoSuchObject from Standard, |
| 48 | DomainError from Standard, |
| 49 | OutOfRange from Standard |
| 50 | |
| 51 | is |
| 52 | |
| 53 | Create returns CurveOnSurface; |
| 54 | |
| 55 | Create(S : HSurface from Adaptor3d) returns CurveOnSurface; |
| 56 | |
| 57 | Create (C : HCurve2d from Adaptor2d; S : HSurface from Adaptor3d) |
| 58 | returns CurveOnSurface; |
| 59 | ---Purpose: Creates a CurveOnSurface from the 2d curve <C> and |
| 60 | -- the surface <S>. |
| 61 | |
| 62 | Load(me : in out;S : HSurface from Adaptor3d) |
| 63 | ---Purpose: Changes the surface. |
| 64 | is static; |
| 65 | |
| 66 | Load(me : in out; C : HCurve2d from Adaptor2d) |
| 67 | ---Purpose: Changes the 2d curve. |
| 68 | is static; |
| 69 | |
| 70 | GetCurve(me) returns HCurve2d from Adaptor2d |
| 71 | ---C++: return const & |
| 72 | is static; |
| 73 | |
| 74 | GetSurface(me) returns HSurface from Adaptor3d |
| 75 | ---C++: return const & |
| 76 | is static; |
| 77 | |
| 78 | ChangeCurve(me : in out) returns HCurve2d from Adaptor2d |
| 79 | ---C++: return & |
| 80 | is static; |
| 81 | |
| 82 | ChangeSurface(me : in out) returns HSurface from Adaptor3d |
| 83 | ---C++: return & |
| 84 | is static; |
| 85 | |
| 86 | -- |
| 87 | -- Implementation of Curve from Adaptor3d methods |
| 88 | -- |
| 89 | |
| 90 | -- |
| 91 | -- Global methods - Apply to the whole curve. |
| 92 | -- |
| 93 | |
| 94 | FirstParameter(me) returns Real |
| 95 | is redefined static; |
| 96 | |
| 97 | LastParameter(me) returns Real |
| 98 | is redefined static; |
| 99 | |
| 100 | Continuity(me) returns Shape from GeomAbs |
| 101 | is redefined static; |
| 102 | |
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103 | NbIntervals(me; S : Shape from GeomAbs) returns Integer |
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104 | ---Purpose: Returns the number of intervals for continuity |
| 105 | -- <S>. May be one if Continuity(me) >= <S> |
| 106 | is redefined static; |
| 107 | |
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108 | Intervals(me; T : in out Array1OfReal from TColStd; |
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109 | S : Shape from GeomAbs) |
| 110 | ---Purpose: Stores in <T> the parameters bounding the intervals |
| 111 | -- of continuity <S>. |
| 112 | -- |
| 113 | -- The array must provide enough room to accomodate |
| 114 | -- for the parameters. i.e. T.Length() > NbIntervals() |
| 115 | raises |
| 116 | OutOfRange from Standard |
| 117 | is redefined static; |
| 118 | |
| 119 | Trim(me; First, Last, Tol : Real) returns HCurve from Adaptor3d |
| 120 | ---Purpose: Returns a curve equivalent of <me> between |
| 121 | -- parameters <First> and <Last>. <Tol> is used to |
| 122 | -- test for 3d points confusion. |
| 123 | raises |
| 124 | OutOfRange from Standard |
| 125 | ---Purpose: If <First> >= <Last> |
| 126 | is redefined static; |
| 127 | |
| 128 | IsClosed(me) returns Boolean |
| 129 | is redefined static; |
| 130 | |
| 131 | IsPeriodic(me) returns Boolean |
| 132 | is redefined static; |
| 133 | |
| 134 | Period(me) returns Real |
| 135 | raises |
| 136 | DomainError from Standard -- if the curve is not periodic |
| 137 | is redefined static; |
| 138 | |
| 139 | Value(me; U : Real) returns Pnt from gp |
| 140 | --- Purpose : Computes the point of parameter U on the curve. |
| 141 | is redefined static; |
| 142 | |
| 143 | D0 (me; U : Real; P : out Pnt from gp) |
| 144 | --- Purpose : Computes the point of parameter U on the curve. |
| 145 | is redefined static; |
| 146 | |
| 147 | D1 (me; U : Real; P : out Pnt from gp ; V : out Vec from gp) |
| 148 | --- Purpose : Computes the point of parameter U on the curve with its |
| 149 | -- first derivative. |
| 150 | raises |
| 151 | DomainError from Standard |
| 152 | --- Purpose : Raised if the continuity of the current interval |
| 153 | -- is not C1. |
| 154 | is redefined static; |
| 155 | |
| 156 | D2 (me; U : Real; P : out Pnt from gp; V1, V2 : out Vec from gp) |
| 157 | --- Purpose : |
| 158 | -- Returns the point P of parameter U, the first and second |
| 159 | -- derivatives V1 and V2. |
| 160 | raises |
| 161 | DomainError from Standard |
| 162 | --- Purpose : Raised if the continuity of the current interval |
| 163 | -- is not C2. |
| 164 | is redefined static; |
| 165 | |
| 166 | D3 (me; U : Real; P : out Pnt from gp; V1, V2, V3 : out Vec from gp) |
| 167 | --- Purpose : |
| 168 | -- Returns the point P of parameter U, the first, the second |
| 169 | -- and the third derivative. |
| 170 | raises |
| 171 | DomainError from Standard |
| 172 | --- Purpose : Raised if the continuity of the current interval |
| 173 | -- is not C3. |
| 174 | is redefined static; |
| 175 | |
| 176 | DN (me; U : Real; N : Integer) returns Vec from gp |
| 177 | --- Purpose : |
| 178 | -- The returned vector gives the value of the derivative for the |
| 179 | -- order of derivation N. |
| 180 | raises |
| 181 | DomainError from Standard, |
| 182 | --- Purpose : Raised if the continuity of the current interval |
| 183 | -- is not CN. |
| 184 | OutOfRange from Standard |
| 185 | --- Purpose : Raised if N < 1. |
| 186 | is redefined static; |
| 187 | |
| 188 | Resolution(me; R3d : Real) returns Real |
| 189 | ---Purpose : Returns the parametric resolution corresponding |
| 190 | -- to the real space resolution <R3d>. |
| 191 | is redefined static; |
| 192 | |
| 193 | GetType(me) returns CurveType from GeomAbs |
| 194 | ---Purpose: Returns the type of the curve in the current |
| 195 | -- interval : Line, Circle, Ellipse, Hyperbola, |
| 196 | -- Parabola, BezierCurve, BSplineCurve, OtherCurve. |
| 197 | is redefined static; |
| 198 | |
| 199 | -- |
| 200 | -- The following methods must be called when GetType returned |
| 201 | -- the corresponding type. |
| 202 | -- |
| 203 | |
| 204 | Line(me) returns Lin from gp |
| 205 | raises |
| 206 | NoSuchObject from Standard |
| 207 | is redefined static; |
| 208 | |
| 209 | Circle(me) returns Circ from gp |
| 210 | raises |
| 211 | NoSuchObject from Standard |
| 212 | is redefined static; |
| 213 | |
| 214 | Ellipse(me) returns Elips from gp |
| 215 | raises |
| 216 | NoSuchObject from Standard |
| 217 | is redefined static; |
| 218 | |
| 219 | Hyperbola(me) returns Hypr from gp |
| 220 | raises |
| 221 | NoSuchObject from Standard |
| 222 | is redefined static; |
| 223 | |
| 224 | Parabola(me) returns Parab from gp |
| 225 | raises |
| 226 | NoSuchObject from Standard |
| 227 | is redefined static; |
| 228 | |
| 229 | Degree(me) returns Integer |
| 230 | raises |
| 231 | NoSuchObject from Standard |
| 232 | is redefined static; |
| 233 | |
| 234 | |
| 235 | IsRational(me) returns Boolean |
| 236 | raises |
| 237 | NoSuchObject from Standard |
| 238 | is redefined static; |
| 239 | |
| 240 | NbPoles(me) returns Integer |
| 241 | raises |
| 242 | NoSuchObject from Standard |
| 243 | is redefined static; |
| 244 | |
| 245 | |
| 246 | NbKnots(me) returns Integer |
| 247 | raises |
| 248 | NoSuchObject from Standard |
| 249 | is redefined static; |
| 250 | ---Warning: will raize if this asked on a curve |
| 251 | -- that is not planar |
| 252 | |
| 253 | Bezier(me) returns BezierCurve from Geom |
| 254 | raises |
| 255 | NoSuchObject from Standard |
| 256 | is redefined static; |
| 257 | |
| 258 | BSpline(me) returns BSplineCurve from Geom |
| 259 | raises |
| 260 | NoSuchObject from Standard |
| 261 | is redefined static; |
| 262 | |
| 263 | EvalKPart(me : in out) |
| 264 | is static private; |
| 265 | |
| 266 | EvalFirstLastSurf(me : in out) |
| 267 | ---Purpose: Evaluates myFirstSurf and myLastSurf |
| 268 | -- for trimming the curve on surface. |
| 269 | is static private; |
| 270 | |
| 271 | |
| 272 | ---Purpose: Following methods output left-bottom and right-top points |
| 273 | -- of located part on surface |
| 274 | -- for trimming the curve on surface. |
| 275 | |
| 276 | LocatePart(me; UV : Pnt2d from gp; DUV : Vec2d from gp; |
| 277 | S : HSurface from Adaptor3d; |
| 278 | LeftBot, RightTop : out Pnt2d from gp) |
| 279 | is static private; |
| 280 | |
| 281 | LocatePart_RevExt(me; UV : Pnt2d from gp; DUV : Vec2d from gp; |
| 282 | S : HSurface from Adaptor3d; |
| 283 | LeftBot, RightTop : out Pnt2d from gp) |
| 284 | returns Boolean |
| 285 | is static private; |
| 286 | |
| 287 | LocatePart_Offset(me; UV : Pnt2d from gp; DUV : Vec2d from gp; |
| 288 | S : HSurface from Adaptor3d; |
| 289 | LeftBot, RightTop : out Pnt2d from gp) |
| 290 | returns Boolean |
| 291 | is static private; |
| 292 | |
| 293 | FindBounds(me; Arr : Array1OfReal from TColStd; |
| 294 | XYComp : Real from Standard; |
| 295 | DUVComp : Real from Standard; |
| 296 | Bnd1 : out Integer from Standard; |
| 297 | Bnd2 : out Integer from Standard; |
| 298 | DerIsNull : out Boolean from Standard) |
| 299 | ---Purpose: Extracts the numbers of knots which equal |
| 300 | -- the point and checks derivative components |
| 301 | -- by zero equivalence. |
| 302 | is static private; |
| 303 | |
| 304 | |
| 305 | |
| 306 | fields |
| 307 | |
| 308 | mySurface : HSurface from Adaptor3d; |
| 309 | myCurve : HCurve2d from Adaptor2d; |
| 310 | |
| 311 | myType : CurveType from GeomAbs; |
| 312 | myCirc : Circ from gp; |
| 313 | myLin : Lin from gp; |
| 314 | |
| 315 | myFirstSurf : HSurface from Adaptor3d; |
| 316 | myLastSurf : HSurface from Adaptor3d; |
| 317 | |
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318 | myIntervals : HSequenceOfReal from TColStd; |
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319 | myIntCont : Shape from GeomAbs; |
| 320 | |
| 321 | end CurveOnSurface; |
| 322 | |
| 323 | |
| 324 | |
| 325 | |
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