1// @configure_input@
2
3/**************************************************************************\
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33\**************************************************************************/
34
35#include <assert.h>
36
37#include <Inventor/SbViewportRegion.h>
38#include <Inventor/SbLinear.h>
39#include <Inventor/errors/SoDebugError.h>
40#include <Inventor/actions/SoGLRenderAction.h>
41#include <Inventor/actions/SoPickAction.h>
42#include <Inventor/actions/SoRayPickAction.h>
43#include <Inventor/actions/SoGetMatrixAction.h>
44#include <Inventor/elements/SoModelMatrixElement.h>
45
46#include <Inventor/@Gui@/nodes/SoGuiViewportFix.h>
47
48// *************************************************************************
49
50SO_NODE_SOURCE(SoGuiViewportFix);
51
52void
53SoGuiViewportFix::initClass(void)
54{
55  SO_NODE_INIT_CLASS(SoGuiViewportFix, SoTransformation, "Transformation");
56}
57
58SoGuiViewportFix::SoGuiViewportFix(void)
59{
60  this->internals = NULL;
61
62  SO_NODE_CONSTRUCTOR(SoGuiViewportFix);
63
64  SO_NODE_ADD_FIELD(corner, (SoGuiViewportFix::LEFT_BOTTOM));
65  SO_NODE_ADD_FIELD(viewportSize, (SbVec3f(0.0f, 0.0f, 0.0f)));
66
67  SO_NODE_DEFINE_ENUM_VALUE(Corner, LEFT_TOP);
68  SO_NODE_DEFINE_ENUM_VALUE(Corner, RIGHT_TOP);
69  SO_NODE_DEFINE_ENUM_VALUE(Corner, LEFT_BOTTOM);
70  SO_NODE_DEFINE_ENUM_VALUE(Corner, RIGHT_BOTTOM);
71
72  SO_NODE_SET_SF_ENUM_TYPE(corner, Corner);
73}
74
75SoGuiViewportFix::~SoGuiViewportFix(void)
76{
77}
78
79void
80SoGuiViewportFix::doAction(SoAction * action)
81{
82  SoState * state = action->getState();
83  if ( ! state->isElementEnabled(SoModelMatrixElement::getClassStackIndex()) ) return;
84
85  SbVec3f vpsize = this->viewportSize.getValue();
86  if ( vpsize[0] <= 0.0f || vpsize[1] <= 0.0f ) return;
87
88  SoModelMatrixElement::makeIdentity(state, this);
89
90  switch ( this->corner.getValue() ) {
91  case SoGuiViewportFix::LEFT_BOTTOM:
92    do {
93      SbVec3f translation(-1.0f, -1.0f, 0.0f);
94      SbVec3f scale(2.0f, 2.0f, 1.0f);
95      if ( vpsize[0] > vpsize[1] ) {
96	translation[0] = translation[0] * (vpsize[0] / vpsize[1]);
97	scale[0] = scale[0] * (vpsize[0] / vpsize[1]);
98      } else {
99	translation[1] = translation[1] * (vpsize[1] / vpsize[0]);
100	scale[1] = scale[1] * (vpsize[1] / vpsize[0]);
101      }
102      SoModelMatrixElement::translateBy(state, this, translation);
103      SoModelMatrixElement::scaleBy(state, this, scale);
104      // FIXME: scale
105    } while ( FALSE );
106    break;
107  default:
108    do {
109      SoDebugError::postInfo("SoGuiViewportFix::GLRender", "unimplemented corner");
110    } while ( FALSE );
111    break;
112  }
113}
114
115void
116SoGuiViewportFix::GLRender(SoGLRenderAction * action)
117{
118  const SbViewportRegion & vp = action->getViewportRegion();
119  SbVec2s vpsize = vp.getViewportSizePixels();
120
121  SbVec3f viewport(vpsize[0], vpsize[1], 0.0f);
122  if ( viewport != this->viewportSize.getValue() )
123    this->viewportSize.setValue(vpsize[0], vpsize[1], 0.0f);
124
125  this->doAction(action);
126}
127
128void
129SoGuiViewportFix::pick(SoPickAction * action)
130{
131  this->doAction(action);
132}
133
134void
135SoGuiViewportFix::rayPick(SoRayPickAction * action)
136{
137  this->doAction(action);
138}
139
140void
141SoGuiViewportFix::getMatrix(SoGetMatrixAction * action)
142{
143  SoDebugError::postInfo("SoGuiViewportFix::getMatrix", "not implemented yet");
144
145  SbVec3f vpsize = this->viewportSize.getValue();
146  if ( vpsize[0] <= 0.0f || vpsize[1] <= 0.0f ) return;
147
148  action->getMatrix() = SbMatrix::identity();
149
150  switch ( this->corner.getValue() ) {
151  case SoGuiViewportFix::LEFT_BOTTOM:
152    do {
153      SbVec3f translation(-1.0f, -1.0f, 0.0f);
154      SbVec3f scale(2.0f, 2.0f, 1.0f);
155      if ( vpsize[0] > vpsize[1] ) {
156	translation[0] = translation[0] * (vpsize[0] / vpsize[1]);
157	scale[0] = scale[0] * (vpsize[0] / vpsize[1]);
158      } else {
159	translation[1] = translation[1] * (vpsize[1] / vpsize[0]);
160	scale[1] = scale[1] * (vpsize[1] / vpsize[0]);
161      }
162      SbMatrix matrix = SbMatrix::identity();
163      matrix.setTranslate(translation);
164      action->getMatrix().multLeft(matrix);
165
166      matrix = SbMatrix::identity();
167      matrix.setScale(scale);
168      action->getMatrix().multLeft(matrix);
169    } while ( FALSE );
170    break;
171  default:
172    do {
173      SoDebugError::postInfo("SoGuiViewportFix::GLRender", "unimplemented corner");
174    } while ( FALSE );
175    break;
176  }
177}
178
179