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1 | // Copyright (c) 2019 OPEN CASCADE SAS |
2 | // |
3 | // This file is part of Open CASCADE Technology software library. |
4 | // |
5 | // This library is free software; you can redistribute it and/or modify it under |
6 | // the terms of the GNU Lesser General Public License version 2.1 as published |
7 | // by the Free Software Foundation, with special exception defined in the file |
8 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
9 | // distribution for complete text of the license and disclaimer of any warranty. |
10 | // |
11 | // Alternatively, this file may be used under the terms of Open CASCADE |
12 | // commercial license or contractual agreement. |
13 | |
14 | #include <SelectMgr_ViewClipRange.hxx> |
15 | |
16 | #include <gp_Ax1.hxx> |
17 | #include <Graphic3d_SequenceOfHClipPlane.hxx> |
18 | |
19 | // ======================================================================= |
20 | // function : AddClippingPlanes |
21 | // purpose : |
22 | // ======================================================================= |
23 | void SelectMgr_ViewClipRange::AddClippingPlanes (const Graphic3d_SequenceOfHClipPlane& thePlanes, |
24 | const gp_Ax1& thePickRay) |
25 | { |
26 | const gp_Dir& aViewRayDir = thePickRay.Direction(); |
27 | const gp_Pnt& aNearPnt = thePickRay.Location(); |
28 | |
29 | Graphic3d_Vec4d aPlaneABCD; |
30 | for (Graphic3d_SequenceOfHClipPlane::Iterator aPlaneIt (thePlanes); aPlaneIt.More(); aPlaneIt.Next()) |
31 | { |
32 | const Handle(Graphic3d_ClipPlane)& aClipPlane = aPlaneIt.Value(); |
33 | if (!aClipPlane->IsOn()) |
34 | { |
35 | continue; |
36 | } |
37 | |
38 | Bnd_Range aSubRange (RealFirst(), RealLast()); |
39 | for (const Graphic3d_ClipPlane* aSubPlaneIter = aClipPlane.get(); aSubPlaneIter != NULL; aSubPlaneIter = aSubPlaneIter->ChainNextPlane().get()) |
40 | { |
41 | const gp_Pln aGeomPlane = aSubPlaneIter->ToPlane(); |
42 | aGeomPlane.Coefficients (aPlaneABCD[0], aPlaneABCD[1], aPlaneABCD[2], aPlaneABCD[3]); |
43 | |
44 | const gp_XYZ& aPlaneDirXYZ = aGeomPlane.Axis().Direction().XYZ(); |
45 | Standard_Real aDotProduct = aViewRayDir.XYZ().Dot (aPlaneDirXYZ); |
46 | Standard_Real aDistance = -aNearPnt.XYZ().Dot (aPlaneDirXYZ) - aPlaneABCD[3]; |
47 | Standard_Real aDistToPln = 0.0; |
48 | |
49 | // check whether the pick line is parallel to clip plane |
50 | if (Abs (aDotProduct) < Precision::Angular()) |
51 | { |
52 | if (aDistance < 0.0) |
53 | { |
54 | continue; |
55 | } |
56 | aDistToPln = RealLast(); |
57 | aDotProduct = 1.0; |
58 | } |
59 | else |
60 | { |
61 | // compute distance to point of pick line intersection with the plane |
62 | const Standard_Real aParam = aDistance / aDotProduct; |
63 | |
64 | const gp_Pnt anIntersectionPnt = aNearPnt.XYZ() + aViewRayDir.XYZ() * aParam; |
65 | aDistToPln = anIntersectionPnt.Distance (aNearPnt); |
66 | if (aParam < 0.0) |
67 | { |
68 | // the plane is "behind" the ray |
69 | aDistToPln = -aDistToPln; |
70 | } |
71 | } |
72 | |
73 | // change depth limits for case of opposite and directed planes |
74 | if (!aClipPlane->IsChain()) |
75 | { |
76 | if (aDotProduct < 0.0) |
77 | { |
78 | ChangeUnclipRange().TrimTo (aDistToPln); |
79 | } |
80 | else |
81 | { |
82 | ChangeUnclipRange().TrimFrom (aDistToPln); |
83 | } |
84 | } |
85 | else |
86 | { |
87 | if (aDotProduct < 0.0) |
88 | { |
89 | aSubRange.TrimFrom (aDistToPln); |
90 | } |
91 | else |
92 | { |
93 | aSubRange.TrimTo (aDistToPln); |
94 | } |
95 | } |
96 | } |
97 | |
98 | if (!aSubRange.IsVoid() |
99 | && aClipPlane->IsChain()) |
100 | { |
101 | AddClipSubRange (aSubRange); |
102 | } |
103 | } |
104 | } |
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105 | |
106 | // ======================================================================= |
107 | // function : DumpJson |
108 | // purpose : |
109 | // ======================================================================= |
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110 | void SelectMgr_ViewClipRange::DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth) const |
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111 | { |
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112 | OCCT_DUMP_CLASS_BEGIN (theOStream, SelectMgr_ViewClipRange) |
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113 | |
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114 | for (size_t aRangeIter = 0; aRangeIter < myClipRanges.size(); ++aRangeIter) |
115 | { |
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116 | Bnd_Range aClipRange = myClipRanges[aRangeIter]; |
117 | OCCT_DUMP_FIELD_VALUES_DUMPED (theOStream, theDepth, &aClipRange) |
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118 | } |
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119 | OCCT_DUMP_FIELD_VALUES_DUMPED (theOStream, theDepth, &myUnclipRange) |
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120 | } |