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1 | //-- File : HLRBRep_BSurfaceTool.cxx |
| 2 | //-- Created : Wed Jui 7 18:00:00 1993 |
| 3 | //-- Author : Laurent BUCHARD |
| 4 | //-- <lbr@nonox> |
| 5 | //-- Copyright: Matra Datavision 1993 |
| 6 | |
| 7 | #include <HLRBRep_BSurfaceTool.ixx> |
| 8 | #include <BRepAdaptor_Surface.hxx> |
| 9 | |
| 10 | //======================================================================= |
| 11 | //function : NbSamplesU |
| 12 | //purpose : |
| 13 | //======================================================================= |
| 14 | |
| 15 | Standard_Integer |
| 16 | HLRBRep_BSurfaceTool::NbSamplesU(const BRepAdaptor_Surface& S) |
| 17 | { |
| 18 | Standard_Integer nbs; |
| 19 | GeomAbs_SurfaceType typS = S.GetType(); |
| 20 | switch(typS) { |
| 21 | case GeomAbs_Plane: |
| 22 | { |
| 23 | nbs = 2; |
| 24 | } |
| 25 | break; |
| 26 | case GeomAbs_BezierSurface: |
| 27 | { |
| 28 | nbs = 3 + S.NbUPoles(); |
| 29 | } |
| 30 | break; |
| 31 | case GeomAbs_BSplineSurface: |
| 32 | { |
| 33 | nbs = S.NbUKnots(); |
| 34 | nbs*= S.UDegree(); |
| 35 | if(nbs < 2) nbs=2; |
| 36 | |
| 37 | } |
| 38 | break; |
| 39 | case GeomAbs_Torus: |
| 40 | { |
| 41 | nbs = 20; |
| 42 | } |
| 43 | break; |
| 44 | case GeomAbs_Cylinder: |
| 45 | case GeomAbs_Cone: |
| 46 | case GeomAbs_Sphere: |
| 47 | case GeomAbs_SurfaceOfRevolution: |
| 48 | case GeomAbs_SurfaceOfExtrusion: |
| 49 | { |
| 50 | nbs = 10; |
| 51 | } |
| 52 | break; |
| 53 | |
| 54 | default: |
| 55 | { |
| 56 | nbs = 10; |
| 57 | } |
| 58 | break; |
| 59 | } |
| 60 | return(nbs); |
| 61 | } |
| 62 | |
| 63 | //======================================================================= |
| 64 | //function : NbSamplesV |
| 65 | //purpose : |
| 66 | //======================================================================= |
| 67 | |
| 68 | Standard_Integer |
| 69 | HLRBRep_BSurfaceTool::NbSamplesV(const BRepAdaptor_Surface& S) |
| 70 | { |
| 71 | Standard_Integer nbs; |
| 72 | GeomAbs_SurfaceType typS = S.GetType(); |
| 73 | switch(typS) { |
| 74 | case GeomAbs_Plane: |
| 75 | { |
| 76 | nbs = 2; |
| 77 | } |
| 78 | break; |
| 79 | case GeomAbs_BezierSurface: |
| 80 | { |
| 81 | nbs = 3 + S.NbVPoles(); |
| 82 | } |
| 83 | break; |
| 84 | case GeomAbs_BSplineSurface: |
| 85 | { |
| 86 | nbs = S.NbVKnots(); |
| 87 | nbs*= S.VDegree(); |
| 88 | if(nbs < 2) nbs=2; |
| 89 | |
| 90 | } |
| 91 | break; |
| 92 | case GeomAbs_Cylinder: |
| 93 | case GeomAbs_Cone: |
| 94 | case GeomAbs_Sphere: |
| 95 | case GeomAbs_Torus: |
| 96 | case GeomAbs_SurfaceOfRevolution: |
| 97 | case GeomAbs_SurfaceOfExtrusion: |
| 98 | { |
| 99 | nbs = 15; |
| 100 | } |
| 101 | break; |
| 102 | |
| 103 | default: |
| 104 | { |
| 105 | nbs = 10; |
| 106 | } |
| 107 | break; |
| 108 | } |
| 109 | return(nbs); |
| 110 | } |
| 111 | |
| 112 | //======================================================================= |
| 113 | //function : NbSamplesU |
| 114 | //purpose : |
| 115 | //======================================================================= |
| 116 | |
| 117 | Standard_Integer |
| 118 | HLRBRep_BSurfaceTool::NbSamplesU(const BRepAdaptor_Surface& S, |
| 119 | const Standard_Real u1, |
| 120 | const Standard_Real u2) |
| 121 | { |
| 122 | Standard_Integer nbs = NbSamplesU(S); |
| 123 | Standard_Integer n = nbs; |
| 124 | if(nbs>10) { |
| 125 | Standard_Real uf = FirstUParameter(S); |
| 126 | Standard_Real ul = LastUParameter(S); |
| 127 | n*= (Standard_Integer)((u2-u1)/(uf-ul)); |
| 128 | if(n>nbs) n = nbs; |
| 129 | if(n<5) n = 5; |
| 130 | } |
| 131 | return(n); |
| 132 | } |
| 133 | |
| 134 | //======================================================================= |
| 135 | //function : NbSamplesV |
| 136 | //purpose : |
| 137 | //======================================================================= |
| 138 | |
| 139 | Standard_Integer |
| 140 | HLRBRep_BSurfaceTool::NbSamplesV(const BRepAdaptor_Surface& S, |
| 141 | const Standard_Real v1, |
| 142 | const Standard_Real v2) |
| 143 | { |
| 144 | Standard_Integer nbs = NbSamplesV(S); |
| 145 | Standard_Integer n = nbs; |
| 146 | if(nbs>10) { |
| 147 | Standard_Real vf = FirstVParameter(S); |
| 148 | Standard_Real vl = LastVParameter(S); |
| 149 | n*= (Standard_Integer)((v2-v1)/(vf-vl)); |
| 150 | if(n>nbs) n = nbs; |
| 151 | if(n<5) n = 5; |
| 152 | } |
| 153 | return(n); |
| 154 | } |
| 155 | |
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