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25 //
26 //
27 //
28 //
29 // A.Walkden 28/11/95
30 // G4VisExtent.cc - to return parameters useful to the drawing window
31 // employed by Visualization code.
32
33 #include "G4VisExtent.hh"
34
35 #include "G4ThreeVector.hh"
36
37 G4VisExtent::G4VisExtent (G4double xmin, G4double xmax,
38 G4double ymin, G4double ymax,
39 G4double zmin, G4double zmax):
40 fXmin(xmin), fXmax(xmax), fYmin(ymin), fYmax(ymax), fZmin(zmin), fZmax(zmax),
41 fRadiusCached(false), fCentreCached(false), fRadius(0.)
42 {}
43
44 G4VisExtent::G4VisExtent (const G4Point3D& centre, G4double radius):
45 fRadiusCached(true), fCentreCached(true),
46 fRadius(radius), fCentre(centre)
47 {
48 // Use exscribed radius ... see comments in header file.
49 G4double halfSide (radius / std::sqrt (3.));
50 fXmin = centre.x () - halfSide;
51 fXmax = centre.x () + halfSide;
52 fYmin = centre.y () - halfSide;
53 fYmax = centre.y () + halfSide;
54 fZmin = centre.z () - halfSide;
55 fZmax = centre.z () + halfSide;
56 }
57
58 G4VisExtent::~G4VisExtent () = default;
59
60 const G4VisExtent& G4VisExtent::GetNullExtent () {
61 static const G4VisExtent nullExtent = G4VisExtent();
62 return nullExtent;
63 }
64
65 const G4Point3D& G4VisExtent::GetExtentCentre () const {
66 if (!fCentreCached) {
67 fCentre = G4Point3D (((fXmin + fXmax) / 2.),
68 ((fYmin + fYmax) / 2.),
69 ((fZmin + fZmax) / 2.));
70 fCentreCached = true;
71 }
72 return fCentre;
73 }
74
75 G4double G4VisExtent::GetExtentRadius () const {
76 if (!fRadiusCached) {
77 fRadius = std::sqrt (((fXmax - fXmin) * (fXmax - fXmin)) +
78 ((fYmax - fYmin) * (fYmax - fYmin)) +
79 ((fZmax - fZmin) * (fZmax - fZmin))) / 2.;
80 fRadiusCached = true;
81 }
82 return fRadius;
83 }
84
85 std::ostream& operator << (std::ostream& os, const G4VisExtent& e) {
86 os << "G4VisExtent (bounding box):";
87 os << "\n X limits: " << e.fXmin << ' ' << e.fXmax;
88 os << "\n Y limits: " << e.fYmin << ' ' << e.fYmax;
89 os << "\n Z limits: " << e.fZmin << ' ' << e.fZmax;
90 return os;
91 }
92
93 G4bool G4VisExtent::operator != (const G4VisExtent& e) const {
94 return ((fXmin != e.fXmin) ||
95 (fXmax != e.fXmax) ||
96 (fYmin != e.fYmin) ||
97 (fYmax != e.fYmax) ||
98 (fZmin != e.fZmin) ||
99 (fZmax != e.fZmax));
100 }
101
102 G4VisExtent& G4VisExtent::Transform (const G4Transform3D& transform)
103 {
104 const auto& rotation = transform.getRotation();
105 const auto& translation = transform.getTranslation();
106
107 G4ThreeVector nnn(fXmin,fYmin,fZmin);
108 G4ThreeVector nnx(fXmin,fYmin,fZmax);
109 G4ThreeVector nxn(fXmin,fYmax,fZmin);
110 G4ThreeVector nxx(fXmin,fYmax,fZmax);
111 G4ThreeVector xnn(fXmax,fYmin,fZmin);
112 G4ThreeVector xnx(fXmax,fYmin,fZmax);
113 G4ThreeVector xxn(fXmax,fYmax,fZmin);
114 G4ThreeVector xxx(fXmax,fYmax,fZmax);
115
116 nnn.transform(rotation); nnn += translation;
117 nnx.transform(rotation); nnx += translation;
118 nxn.transform(rotation); nxn += translation;
119 nxx.transform(rotation); nxx += translation;
120 xnn.transform(rotation); xnn += translation;
121 xnx.transform(rotation); xnx += translation;
122 xxn.transform(rotation); xxn += translation;
123 xxx.transform(rotation); xxx += translation;
124
125 fXmin = DBL_MAX;
126 fYmin = DBL_MAX;
127 fZmin = DBL_MAX;
128 fXmax = -DBL_MAX;
129 fYmax = -DBL_MAX;
130 fZmax = -DBL_MAX;
131 for (const auto& corner: {nnn,nnx,nxn,nxx,xnn,xnx,xxn,xxx}) {
132 if (fXmin > corner.getX()) fXmin = corner.getX();
133 if (fYmin > corner.getY()) fYmin = corner.getY();
134 if (fZmin > corner.getZ()) fZmin = corner.getZ();
135 if (fXmax < corner.getX()) fXmax = corner.getX();
136 if (fYmax < corner.getY()) fYmax = corner.getY();
137 if (fZmax < corner.getZ()) fZmax = corner.getZ();
138 }
139
140 return *this;
141 }
142