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1 | // Created on: 1994-02-03 |
2 | // Created by: Jean Marc LACHAUME |
3 | // Copyright (c) 1994-1999 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 | |
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17 | |
18 | #include <Draw_Appli.hxx> |
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19 | #include <Draw_Color.hxx> |
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20 | #include <Draw_ColorKind.hxx> |
21 | #include <Draw_Display.hxx> |
22 | #include <Draw_Grid.hxx> |
23 | #include <gp_Pnt.hxx> |
24 | #include <gp_Trsf.hxx> |
25 | #include <Standard_Type.hxx> |
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26 | |
27 | static Standard_Real MinimumStep = 1.e-3 ; |
28 | static Standard_Real Ratio = 200.0 ; |
29 | |
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30 | extern Draw_Viewer dout; |
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31 | |
32 | //======================================================================= |
33 | // Function : Draw_Grid |
34 | // Purpose : Constructor. |
35 | //======================================================================= |
36 | |
37 | Draw_Grid::Draw_Grid () : |
38 | myStepX (0.0) , |
39 | myStepY (0.0) , |
40 | myStepZ (0.0) , |
41 | myIsActive (Standard_False) |
42 | { |
43 | } |
44 | |
45 | //======================================================================= |
46 | // Function : Steps |
47 | // Purpose : Sets the steps along the X, Y & Z axis. |
48 | //======================================================================= |
49 | |
50 | void Draw_Grid::Steps (const Standard_Real StepX, |
51 | const Standard_Real StepY, |
52 | const Standard_Real StepZ) |
53 | { |
54 | myStepX = Abs (StepX) ; |
55 | myStepY = Abs (StepY) ; |
56 | myStepZ = Abs (StepZ) ; |
57 | myIsActive = myStepX > MinimumStep |
58 | && myStepY > MinimumStep |
59 | && myStepZ > MinimumStep ; |
60 | } |
61 | |
62 | //======================================================================= |
63 | // Function : DrawOn |
64 | // Purpose : Displays the grid. |
65 | //======================================================================= |
66 | |
67 | void Draw_Grid::DrawOn (Draw_Display& Out) const |
68 | { |
69 | if (!myIsActive) return ; |
70 | |
71 | Standard_Integer xmin, xmax, ymin, ymax ; |
72 | Standard_Integer IndexX, IndexY ; |
73 | Standard_Real StepX, StepY ; |
74 | Standard_Integer MinIndexX, MaxIndexX, MinIndexY, MaxIndexY ; |
75 | Standard_Real Offset ; |
76 | Standard_Real zoom, Xmin, Xmax, Ymin, Ymax ; |
77 | gp_Trsf T ; |
78 | gp_Pnt Pnt1, Pnt2 ; |
79 | |
80 | Standard_Integer IdtView ; |
81 | char *Type ; |
82 | |
83 | IdtView = Out.ViewId () ; |
84 | if (!dout.HasView (IdtView)) return ; |
85 | Type = dout.GetType (IdtView) ; |
86 | switch (*(Type+1)) { |
87 | case 'X' : StepX = myStepX ; break ; |
88 | case 'Y' : StepX = myStepY ; break ; |
89 | case 'Z' : StepX = myStepZ ; break ; |
90 | default : StepX = 0.0 ; break ; |
91 | } |
92 | switch (*(Type+3)) { |
93 | case 'X' : StepY = myStepX ; break ; |
94 | case 'Y' : StepY = myStepY ; break ; |
95 | case 'Z' : StepY = myStepZ ; break ; |
96 | default : StepY = 0.0 ; break ; |
97 | } |
98 | |
99 | if (StepX > MinimumStep && StepY > MinimumStep) { |
100 | |
101 | dout.GetFrame (IdtView, xmin, ymin, xmax, ymax) ; |
102 | dout.GetTrsf (IdtView, T) ; T.Invert () ; |
103 | zoom = dout.Zoom (IdtView) ; |
104 | |
105 | Xmin = ((Standard_Real) xmin) / zoom ; |
106 | Xmax = ((Standard_Real) xmax) / zoom ; |
107 | Ymin = ((Standard_Real) ymin) / zoom ; |
108 | Ymax = ((Standard_Real) ymax) / zoom ; |
109 | |
110 | Offset = Min (Xmax - Xmin, Ymax - Ymin) / Ratio ; |
111 | |
112 | MinIndexX = (Standard_Integer) (Xmin / StepX) ; |
113 | MaxIndexX = (Standard_Integer) (Xmax / StepX) ; |
114 | MinIndexY = (Standard_Integer) (Ymin / StepY) ; |
115 | MaxIndexY = (Standard_Integer) (Ymax / StepY) ; |
116 | |
117 | for (IndexX = MinIndexX ; IndexX <= MaxIndexX ; IndexX++) { |
118 | for (IndexY = MinIndexY ; IndexY <= MaxIndexY ; IndexY++) { |
119 | Standard_Real X = ((Standard_Real) IndexX) * StepX ; |
120 | Standard_Real Y = ((Standard_Real) IndexY) * StepY ; |
121 | |
122 | Pnt1.SetCoord (X - Offset, Y, 0.0) ; Pnt1.Transform (T) ; |
123 | Pnt2.SetCoord (X + Offset, Y, 0.0) ; Pnt2.Transform (T) ; |
124 | Out.SetColor (Draw_Color (Draw_bleu)) ; |
125 | Out.Draw (Pnt1, Pnt2) ; |
126 | |
127 | Pnt1.SetCoord (X, Y - Offset, 0.0) ; Pnt1.Transform (T) ; |
128 | Pnt2.SetCoord (X, Y + Offset, 0.0) ; Pnt2.Transform (T) ; |
129 | Out.SetColor (Draw_Color (Draw_bleu)) ; |
130 | Out.Draw (Pnt1, Pnt2) ; |
131 | } |
132 | } |
133 | |
134 | } |
135 | } |