| 7fd59977 |
1 | -- File: GeomFill_Frenet.cdl |
| 2 | -- Created: Fri Dec 19 11:57:17 1997 |
| 3 | -- Author: Philippe MANGIN |
| 4 | -- <pmn@sgi29> |
| 5 | ---Copyright: Matra Datavision 1997 |
| 6 | |
| 7 | |
| 8 | class Frenet from GeomFill |
| 9 | inherits TrihedronLaw from GeomFill |
| 10 | |
| 11 | ---Purpose: Defined Frenet Trihedron Law |
| 12 | |
| 13 | uses |
| 14 | HCurve from Adaptor3d, |
| 15 | Shape from GeomAbs, |
| 16 | Array1OfReal from TColStd, |
| 17 | Pnt from gp, |
| 18 | Vec from gp, |
| 19 | HArray1OfReal from TColStd, |
| 20 | HArray1OfBoolean from TColStd |
| 21 | raises |
| 22 | OutOfRange, ConstructionError |
| 23 | is |
| 24 | |
| 25 | Create |
| 26 | returns Frenet from GeomFill |
| 27 | raises ConstructionError; |
| 28 | |
| 29 | Copy(me) |
| 30 | returns TrihedronLaw from GeomFill |
| 31 | is redefined; |
| 32 | |
| 33 | Init(me: mutable) |
| 34 | is static; |
| 35 | |
| 36 | SetCurve(me : mutable; C : HCurve from Adaptor3d) |
| 37 | is redefined; |
| 38 | |
| 39 | -- |
| 40 | -- |
| 41 | --========== To compute Location and derivatives Location |
| 42 | -- |
| 43 | D0(me : mutable; |
| 44 | Param: Real; |
| 45 | Tangent : out Vec from gp; |
| 46 | Normal : out Vec from gp; |
| 47 | BiNormal : out Vec from gp) |
| 48 | ---Purpose: compute Triedrhon on curve at parameter <Param> |
| 49 | returns Boolean is redefined; |
| 50 | |
| 51 | D1(me : mutable; |
| 52 | Param: Real; |
| 53 | Tangent : out Vec from gp; |
| 54 | DTangent : out Vec from gp; |
| 55 | Normal : out Vec from gp; |
| 56 | DNormal : out Vec from gp; |
| 57 | BiNormal : out Vec from gp; |
| 58 | DBiNormal : out Vec from gp) |
| 59 | ---Purpose: compute Triedrhon and derivative Trihedron on curve |
| 60 | -- at parameter <Param> |
| 61 | -- Warning : It used only for C1 or C2 aproximation |
| 62 | returns Boolean |
| 63 | is redefined; |
| 64 | |
| 65 | D2(me : mutable; |
| 66 | Param: Real; |
| 67 | Tangent : out Vec from gp; |
| 68 | DTangent : out Vec from gp; |
| 69 | D2Tangent : out Vec from gp; |
| 70 | Normal : out Vec from gp; |
| 71 | DNormal : out Vec from gp; |
| 72 | D2Normal : out Vec from gp; |
| 73 | BiNormal : out Vec from gp; |
| 74 | DBiNormal : out Vec from gp; |
| 75 | D2BiNormal : out Vec from gp) |
| 76 | ---Purpose: compute Trihedron on curve |
| 77 | -- first and seconde derivatives. |
| 78 | -- Warning : It used only for C2 aproximation |
| 79 | returns Boolean |
| 80 | is redefined; |
| 81 | -- |
| 82 | -- =================== Management of continuity =================== |
| 83 | -- |
| 84 | NbIntervals(me; S : Shape from GeomAbs) |
| 85 | ---Purpose: Returns the number of intervals for continuity |
| 86 | -- <S>. |
| 87 | -- May be one if Continuity(me) >= <S> |
| 88 | returns Integer is redefined; |
| 89 | |
| 90 | Intervals(me; T : in out Array1OfReal from TColStd; |
| 91 | S : Shape from GeomAbs) |
| 92 | ---Purpose: Stores in <T> the parameters bounding the intervals |
| 93 | -- of continuity <S>. |
| 94 | -- |
| 95 | -- The array must provide enough room to accomodate |
| 96 | -- for the parameters. i.e. T.Length() > NbIntervals() |
| 97 | raises |
| 98 | OutOfRange from Standard |
| 99 | is redefined; |
| 100 | |
| 101 | |
| 102 | -- =================== To help computation of Tolerance =============== |
| 103 | GetAverageLaw(me : mutable; |
| 104 | ATangent : out Vec from gp; |
| 105 | ANormal : out Vec from gp; |
| 106 | ABiNormal : out Vec from gp) |
| 107 | ---Purpose: Get average value of Tangent(t) and Normal(t) it is usfull to |
| 108 | -- make fast approximation of rational surfaces. |
| 109 | is redefined; |
| 110 | |
| 111 | -- =================== To help Particular case =============== |
| 112 | |
| 113 | IsConstant(me) |
| 114 | ---Purpose: Say if the law is Constant. |
| 115 | returns Boolean |
| 116 | is redefined; |
| 117 | |
| 118 | IsOnlyBy3dCurve(me) |
| 119 | ---Purpose: Return True. |
| 120 | returns Boolean |
| 121 | is redefined; |
| 122 | |
| 123 | IsSingular(me; U: Real; Index: out Integer) |
| 124 | returns Boolean |
| 125 | is private; |
| 126 | |
| 127 | DoSingular(me: mutable; U: Real; Index: Integer; |
| 128 | Tangent, BiNormal: out Vec from gp; |
| 129 | n, k, TFlag, BNFlag: out Integer) |
| 130 | returns Boolean |
| 131 | is private; |
| 132 | |
| 133 | SingularD0(me : mutable; |
| 134 | Param: Real; Index: Integer; |
| 135 | Tangent : out Vec from gp; |
| 136 | Normal : out Vec from gp; |
| 137 | BiNormal : out Vec from gp) |
| 138 | ---Purpose: computes Triedrhon on curve at parameter <Param> |
| 139 | returns Boolean |
| 140 | is private; |
| 141 | |
| 142 | SingularD1(me : mutable; |
| 143 | Param: Real; Index: Integer; |
| 144 | Tangent : out Vec from gp; |
| 145 | DTangent : out Vec from gp; |
| 146 | Normal : out Vec from gp; |
| 147 | DNormal : out Vec from gp; |
| 148 | BiNormal : out Vec from gp; |
| 149 | DBiNormal : out Vec from gp) |
| 150 | ---Purpose: computes Triedrhon and derivative Trihedron on curve |
| 151 | -- at parameter <Param> |
| 152 | -- Warning : It used only for C1 or C2 aproximation |
| 153 | returns Boolean |
| 154 | is private; |
| 155 | |
| 156 | SingularD2(me : mutable; |
| 157 | Param: Real; Index: Integer; |
| 158 | Tangent : out Vec from gp; |
| 159 | DTangent : out Vec from gp; |
| 160 | D2Tangent : out Vec from gp; |
| 161 | Normal : out Vec from gp; |
| 162 | DNormal : out Vec from gp; |
| 163 | D2Normal : out Vec from gp; |
| 164 | BiNormal : out Vec from gp; |
| 165 | DBiNormal : out Vec from gp; |
| 166 | D2BiNormal : out Vec from gp) |
| 167 | ---Purpose: computes Trihedron on curve |
| 168 | -- first and seconde derivatives. |
| 169 | -- Warning : It used only for C2 aproximation |
| 170 | returns Boolean |
| 171 | is private; |
| 172 | |
| 173 | fields |
| 174 | P : Pnt from gp; |
| 175 | mySngl : HArray1OfReal from TColStd; |
| 176 | mySnglLen : HArray1OfReal from TColStd; |
| 177 | isSngl : Boolean from Standard; -- True if there is some |
| 178 | -- singular points |
| 179 | end Frenet; |
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