| 1 | -- Created on: 1993-04-02 |
| 2 | -- Created by: Bruno DUMORTIER |
| 3 | -- Copyright (c) 1993-1999 Matra Datavision |
| 4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |
| 5 | -- |
| 6 | -- This file is part of Open CASCADE Technology software library. |
| 7 | -- |
| 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 |
| 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. |
| 13 | -- |
| 14 | -- Alternatively, this file may be used under the terms of Open CASCADE |
| 15 | -- commercial license or contractual agreement. |
| 16 | |
| 17 | deferred class Curve2d from Adaptor2d |
| 18 | |
| 19 | ---Purpose: Root class for 2D curves on which geometric |
| 20 | -- algorithms work. |
| 21 | -- An adapted curve is an interface between the |
| 22 | -- services provided by a curve, and those required of |
| 23 | -- the curve by algorithms, which use it. |
| 24 | -- A derived concrete class is provided: |
| 25 | -- Geom2dAdaptor_Curve for a curve from the Geom2d package. |
| 26 | |
| 27 | uses |
| 28 | |
| 29 | Array1OfReal from TColStd, |
| 30 | Shape from GeomAbs, |
| 31 | CurveType from GeomAbs, |
| 32 | Vec2d from gp, |
| 33 | Pnt2d from gp, |
| 34 | Circ2d from gp, |
| 35 | Elips2d from gp, |
| 36 | Hypr2d from gp, |
| 37 | Parab2d from gp, |
| 38 | Lin2d from gp, |
| 39 | BezierCurve from Geom2d, |
| 40 | BSplineCurve from Geom2d, |
| 41 | HCurve2d from Adaptor2d |
| 42 | |
| 43 | raises |
| 44 | |
| 45 | OutOfRange from Standard, |
| 46 | NoSuchObject from Standard, |
| 47 | DomainError from Standard |
| 48 | |
| 49 | is |
| 50 | |
| 51 | -- |
| 52 | -- Global methods - Apply to the whole curve. |
| 53 | -- |
| 54 | |
| 55 | Delete(me:out) is virtual; |
| 56 | ---C++: alias "Standard_EXPORT virtual ~Adaptor2d_Curve2d(){Delete();}" |
| 57 | |
| 58 | FirstParameter(me) returns Real |
| 59 | is virtual; |
| 60 | |
| 61 | LastParameter(me) returns Real |
| 62 | is virtual; |
| 63 | |
| 64 | Continuity(me) returns Shape from GeomAbs |
| 65 | is virtual; |
| 66 | |
| 67 | NbIntervals(me; S : Shape from GeomAbs) returns Integer |
| 68 | ---Purpose: If necessary, breaks the curve in intervals of |
| 69 | -- continuity <S>. And returns the number of |
| 70 | -- intervals. |
| 71 | is virtual; |
| 72 | |
| 73 | Intervals(me; T : in out Array1OfReal from TColStd; |
| 74 | S : Shape from GeomAbs) |
| 75 | ---Purpose: Stores in <T> the parameters bounding the intervals |
| 76 | -- of continuity <S>. |
| 77 | -- |
| 78 | -- The array must provide enough room to accomodate |
| 79 | -- for the parameters. i.e. T.Length() > NbIntervals() |
| 80 | raises |
| 81 | OutOfRange from Standard |
| 82 | is virtual; |
| 83 | |
| 84 | Trim(me; First, Last, Tol : Real) returns HCurve2d from Adaptor2d |
| 85 | ---Purpose: Returns a curve equivalent of <me> between |
| 86 | -- parameters <First> and <Last>. <Tol> is used to |
| 87 | -- test for 3d points confusion. |
| 88 | raises |
| 89 | OutOfRange from Standard |
| 90 | ---Purpose: If <First> >= <Last> |
| 91 | is virtual; |
| 92 | |
| 93 | -- |
| 94 | -- Local methods - Apply to the current interval. |
| 95 | -- By default the current interval is the first. |
| 96 | -- |
| 97 | |
| 98 | IsClosed(me) returns Boolean |
| 99 | is virtual; |
| 100 | |
| 101 | IsPeriodic(me) returns Boolean |
| 102 | is virtual; |
| 103 | |
| 104 | Period(me) returns Real |
| 105 | raises |
| 106 | DomainError from Standard -- if the curve is not periodic |
| 107 | is virtual; |
| 108 | |
| 109 | Value(me; U : Real) returns Pnt2d from gp |
| 110 | --- Purpose : Computes the point of parameter U on the curve. |
| 111 | is virtual; |
| 112 | |
| 113 | D0 (me; U : Real; P : out Pnt2d from gp) |
| 114 | --- Purpose : Computes the point of parameter U on the curve. |
| 115 | is virtual; |
| 116 | |
| 117 | D1 (me; U : Real; P : out Pnt2d from gp ; V : out Vec2d from gp) |
| 118 | --- Purpose : Computes the point of parameter U on the curve with its |
| 119 | -- first derivative. |
| 120 | raises |
| 121 | DomainError from Standard |
| 122 | --- Purpose : Raised if the continuity of the current interval |
| 123 | -- is not C1. |
| 124 | is virtual; |
| 125 | |
| 126 | D2 (me; U : Real; P : out Pnt2d from gp; V1, V2 : out Vec2d from gp) |
| 127 | --- Purpose : |
| 128 | -- Returns the point P of parameter U, the first and second |
| 129 | -- derivatives V1 and V2. |
| 130 | raises |
| 131 | DomainError from Standard |
| 132 | --- Purpose : Raised if the continuity of the current interval |
| 133 | -- is not C2. |
| 134 | is virtual; |
| 135 | |
| 136 | D3 (me; U : Real; P : out Pnt2d from gp; V1, V2, V3 : out Vec2d from gp) |
| 137 | --- Purpose : |
| 138 | -- Returns the point P of parameter U, the first, the second |
| 139 | -- and the third derivative. |
| 140 | raises |
| 141 | DomainError from Standard |
| 142 | --- Purpose : Raised if the continuity of the current interval |
| 143 | -- is not C3. |
| 144 | is virtual; |
| 145 | |
| 146 | DN (me; U : Real; N : Integer) returns Vec2d from gp |
| 147 | --- Purpose : |
| 148 | -- The returned vector gives the value of the derivative for the |
| 149 | -- order of derivation N. |
| 150 | raises |
| 151 | DomainError from Standard, |
| 152 | --- Purpose : Raised if the continuity of the current interval |
| 153 | -- is not CN. |
| 154 | OutOfRange from Standard |
| 155 | --- Purpose : Raised if N < 1. |
| 156 | is virtual; |
| 157 | |
| 158 | Resolution(me; R3d : Real) returns Real |
| 159 | ---Purpose : Returns the parametric resolution corresponding |
| 160 | -- to the real space resolution <R3d>. |
| 161 | is virtual; |
| 162 | |
| 163 | GetType(me) returns CurveType from GeomAbs |
| 164 | ---Purpose: Returns the type of the curve in the current |
| 165 | -- interval : Line, Circle, Ellipse, Hyperbola, |
| 166 | -- Parabola, BezierCurve, BSplineCurve, OtherCurve. |
| 167 | is virtual; |
| 168 | |
| 169 | -- |
| 170 | -- The following methods must be called when GetType returned |
| 171 | -- the corresponding type. |
| 172 | -- |
| 173 | |
| 174 | Line(me) returns Lin2d from gp |
| 175 | raises |
| 176 | NoSuchObject from Standard |
| 177 | is virtual; |
| 178 | |
| 179 | Circle(me) returns Circ2d from gp |
| 180 | raises |
| 181 | NoSuchObject from Standard |
| 182 | is virtual; |
| 183 | |
| 184 | Ellipse(me) returns Elips2d from gp |
| 185 | raises |
| 186 | NoSuchObject from Standard |
| 187 | is virtual; |
| 188 | |
| 189 | Hyperbola(me) returns Hypr2d from gp |
| 190 | raises |
| 191 | NoSuchObject from Standard |
| 192 | is virtual; |
| 193 | |
| 194 | Parabola(me) returns Parab2d from gp |
| 195 | raises |
| 196 | NoSuchObject from Standard |
| 197 | is virtual; |
| 198 | |
| 199 | |
| 200 | Degree(me) returns Integer |
| 201 | raises |
| 202 | NoSuchObject from Standard |
| 203 | is virtual; |
| 204 | |
| 205 | IsRational(me) returns Boolean |
| 206 | raises |
| 207 | NoSuchObject from Standard |
| 208 | is virtual; |
| 209 | |
| 210 | NbPoles(me) returns Integer |
| 211 | raises |
| 212 | NoSuchObject from Standard |
| 213 | is virtual; |
| 214 | |
| 215 | |
| 216 | NbKnots(me) returns Integer |
| 217 | raises |
| 218 | NoSuchObject from Standard |
| 219 | is virtual; |
| 220 | |
| 221 | NbSamples(me) returns Integer from Standard is virtual; |
| 222 | |
| 223 | Bezier(me) returns BezierCurve from Geom2d |
| 224 | raises |
| 225 | NoSuchObject from Standard |
| 226 | is virtual; |
| 227 | |
| 228 | BSpline(me) returns BSplineCurve from Geom2d |
| 229 | raises |
| 230 | NoSuchObject from Standard |
| 231 | is virtual; |
| 232 | |
| 233 | end Curve2d; |
| 234 | |
| 235 | |