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32
33 /*!
34 \class SoViewingMatrixElement Inventor/elements/SoViewingMatrixElement.h
35 \brief The SoViewingMatrixElement class stores the world-to-camera transformation.
36
37 \ingroup elements
38
39 \sa SoModelMatrixElement
40 */
41
42 #include <Inventor/elements/SoViewingMatrixElement.h>
43
44 #include "SbBasicP.h"
45
46 #include <cassert>
47
48 /*!
49 \fn SoViewingMatrixElement::viewingMatrix
50
51 FIXME: write doc.
52 */
53
54 SO_ELEMENT_SOURCE(SoViewingMatrixElement);
55
56 /*!
57 This static method initializes static data for the SoViewingMatrixElement
58 class.
59 */
60
61 void
initClass(void)62 SoViewingMatrixElement::initClass(void)
63 {
64 SO_ELEMENT_INIT_CLASS(SoViewingMatrixElement, inherited);
65 }
66
67 /*!
68 The destructor.
69 */
70
~SoViewingMatrixElement(void)71 SoViewingMatrixElement::~SoViewingMatrixElement(void)
72 {
73 }
74
75 //! FIXME: write doc.
76
77 void
set(SoState * const state,SoNode * const node,const SbMatrix & viewingMatrix)78 SoViewingMatrixElement::set(SoState * const state,
79 SoNode * const node,
80 const SbMatrix & viewingMatrix)
81 {
82 SoViewingMatrixElement * element = coin_safe_cast<SoViewingMatrixElement *>
83 (
84 SoReplacedElement::getElement(state, classStackIndex, node)
85 );
86 if (element) {
87 element->setElt(viewingMatrix);
88 }
89 }
90
91 //! FIXME: write doc.
92
93 const SbMatrix &
get(SoState * const state)94 SoViewingMatrixElement::get(SoState * const state)
95 {
96 const SoViewingMatrixElement * element =
97 coin_assert_cast<const SoViewingMatrixElement *>
98 (
99 SoElement::getConstElement(state, classStackIndex)
100 );
101 return element->viewingMatrix;
102 }
103
104 //! FIXME: write doc.
105
106 void
init(SoState * state)107 SoViewingMatrixElement::init(SoState * state)
108 {
109 inherited::init(state);
110 viewingMatrix.makeIdentity();
111 #if 0 // debug
112 SoDebugError::postInfo("SoViewingMatrixElement::init",
113 "matrix set to identity");
114 #endif // debug
115 }
116
117 //! FIXME: write doc.
118
119 void
setElt(const SbMatrix & matrix)120 SoViewingMatrixElement::setElt(const SbMatrix &matrix)
121 {
122 this->viewingMatrix = matrix;
123 #if 0 // debug
124 SoDebugError::postInfo("SoViewingMatrixElement::setElt",
125 "viewingmatrix:");
126 matrix.print(stdout);
127 #endif // debug
128 }
129