| 7fd59977 |
1 | -- File: Law_Interpolate.cdl |
| 2 | -- Created: Wed Nov 15 17:30:50 1995 |
| 3 | -- Author: Laurent BOURESCHE |
| 4 | -- <lbo@phylox> |
| 5 | ---Copyright: Matra Datavision 1995 |
| 6 | --- cut and past from GeomAPI_Interpolate in order |
| 7 | -- to provide 1D interpolation. |
| 8 | |
| 9 | class Interpolate from Law |
| 10 | |
| 11 | ---Purpose: This class is used to interpolate a BsplineCurve |
| 12 | -- passing through an array of points, with a C2 |
| 13 | -- Continuity if tangency is not requested at the point. |
| 14 | -- If tangency is requested at the point the continuity |
| 15 | -- will be C1. If Perodicity is requested the curve will |
| 16 | -- be closed and the junction will be the first point |
| 17 | -- given. The curve will than be only C1 |
| 18 | -- |
| 19 | -- |
| 20 | |
| 21 | |
| 22 | |
| 23 | uses |
| 24 | |
| 25 | Array1OfReal from TColStd, |
| 26 | HArray1OfReal from TColStd, |
| 27 | HArray1OfBoolean from TColStd, |
| 28 | BSpline from Law |
| 29 | |
| 30 | raises |
| 31 | NotDone from StdFail, |
| 32 | ConstructionError from Standard |
| 33 | is |
| 34 | |
| 35 | Create(Points : HArray1OfReal from TColStd; |
| 36 | PeriodicFlag : Boolean from Standard; |
| 37 | Tolerance : Real) |
| 38 | ---Purpose: Tolerance is to check if the points are not too close |
| 39 | -- to one an other. It is also used to check if the |
| 40 | -- tangent vector is not too small. There should be at |
| 41 | -- least 2 points. If PeriodicFlag is True then the curve |
| 42 | -- will be periodic be periodic |
| 43 | returns Interpolate from Law |
| 44 | raises ConstructionError from Standard; |
| 45 | |
| 46 | Create(Points : HArray1OfReal from TColStd; |
| 47 | Parameters : HArray1OfReal from TColStd; |
| 48 | PeriodicFlag : Boolean from Standard; |
| 49 | Tolerance : Real from Standard) |
| 50 | ---Purpose: Tolerance is to check if the points are not too close |
| 51 | -- to one an other. It is also used to check if the |
| 52 | -- tangent vector is not too small. There should be at |
| 53 | -- least 2 points. If PeriodicFlag is True then the curve |
| 54 | -- will be periodic be periodic |
| 55 | |
| 56 | -- Warning: There should be as many parameters as there are points |
| 57 | -- except if PeriodicFlag is True then there should be |
| 58 | -- one more parameter to close the curve |
| 59 | returns Interpolate from Law |
| 60 | raises ConstructionError from Standard; |
| 61 | |
| 62 | Load(me : in out; |
| 63 | InitialTangent : Real from Standard; |
| 64 | FinalTangent : Real from Standard) |
| 65 | ---Purpose: loads initial and final tangents if any. |
| 66 | is static; |
| 67 | |
| 68 | Load(me : in out; |
| 69 | Tangents : Array1OfReal from TColStd; |
| 70 | TangentFlags : HArray1OfBoolean from TColStd) |
| 71 | ---Purpose: loads the tangents. We should have as many tangents as |
| 72 | -- they are points in the array if TangentFlags.Value(i) |
| 73 | -- is Standard_True use the tangent Tangents.Value(i) |
| 74 | -- otherwise the tangent is not constrained. |
| 75 | -- |
| 76 | is static; |
| 77 | |
| 78 | ClearTangents(me : in out); |
| 79 | ---Purpose: Clears the tangents if any |
| 80 | |
| 81 | Perform(me : in out); |
| 82 | ---Purpose: Makes the interpolation |
| 83 | |
| 84 | Curve(me) |
| 85 | ---C++: return const & |
| 86 | returns BSpline from Law |
| 87 | raises NotDone from StdFail |
| 88 | is static; |
| 89 | |
| 90 | |
| 91 | IsDone(me) |
| 92 | returns Boolean from Standard |
| 93 | is static; |
| 94 | |
| 95 | PerformNonPeriodic(me : in out) |
| 96 | ---Purpose: Interpolates in a non periodic fashion. |
| 97 | is private; |
| 98 | |
| 99 | PerformPeriodic(me : in out) |
| 100 | ---Purpose: Interpolates in a C1 periodic fashion. |
| 101 | is private; |
| 102 | |
| 103 | fields |
| 104 | |
| 105 | myTolerance : Real from Standard; |
| 106 | -- the 3D tolerance to check for degenerate points |
| 107 | myPoints : HArray1OfReal from TColStd; |
| 108 | -- the points to interpolates |
| 109 | myIsDone : Boolean from Standard; |
| 110 | -- the algorithm did complete OK if Standard_True |
| 111 | myCurve : BSpline from Law; |
| 112 | -- the interpolated curve |
| 113 | myTangents : HArray1OfReal from TColStd; |
| 114 | -- the tangents only defined at slot i if |
| 115 | -- myTangenFlags->Value(i) is Standard_True |
| 116 | myTangentFlags : HArray1OfBoolean from TColStd; |
| 117 | -- the flags defining the tangents |
| 118 | myParameters : HArray1OfReal from TColStd; |
| 119 | -- the parameters used for the cubic interpolation |
| 120 | myPeriodic : Boolean from Standard; |
| 121 | -- if Standard_True the curve will be periodic |
| 122 | myTangentRequest : Boolean from Standard; |
| 123 | -- Tangents are given if True False otherwise |
| 124 | |
| 125 | end Interpolate from Law; |
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