utils/fgviewer/Renderer.cxx

   1 // Viewer.hxx -- alternative flightgear viewer application
   2 //
   3 // Copyright (C) 2009 - 2012  Mathias Froehlich
   4 //
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License as
   7 // published by the Free Software Foundation; either version 2 of the
   8 // License, or (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful, but
  11 // WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 // General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include "Renderer.hxx"
  24
  25 #include <osgViewer/Renderer>
  26 #include <simgear/scene/material/EffectCullVisitor.hxx>
  27
  28 #include "Drawable.hxx"
  29 #include "Viewer.hxx"
  30 #include "SlaveCamera.hxx"
  31
  32 namespace fgviewer  {
  33
  34 // FIXME I understand why we currently need this, but this seems like
  35 // weird to require an own cull visitor.
  36 static void installCullVisitor(osg::Camera& camera)
  37 {
  38     osgViewer::Renderer* renderer = static_cast<osgViewer::Renderer*>(camera.getRenderer());
  39     for (int i = 0; i < 2; ++i) {
  40         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
  41         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
  42
  43         identifier = sceneView->getCullVisitor()->getIdentifier();
  44         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
  45         sceneView->getCullVisitor()->setIdentifier(identifier.get());
  46
  47         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
  48         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
  49         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
  50
  51         identifier = sceneView->getCullVisitorRight()->getIdentifier();
  52         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
  53         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
  54     }
  55 }
  56
  57 class Renderer::_SlaveCamera : public SlaveCamera {
  58 public:
  59     _SlaveCamera(const std::string& name) :
  60         SlaveCamera(name)
  61     {
  62     }
  63     virtual ~_SlaveCamera()
  64     {
  65     }
  66     virtual osg::Camera* _realizeImplementation(Viewer& viewer)
  67     {
  68         osg::Camera* camera = SlaveCamera::_realizeImplementation(viewer);
  69         if (!camera)
  70             return 0;
  71
  72         camera->addChild(viewer.getSceneDataGroup());
  73
  74         viewer.addSlave(camera, osg::Matrix::identity(), getViewOffset(), false /*useMastersSceneData*/);
  75         installCullVisitor(*camera);
  76
  77         return camera;
  78     }
  79     virtual bool _updateImplementation(Viewer& viewer)
  80     {
  81         getCamera()->setViewMatrix(getEffectiveViewOffset(viewer));
  82         getCamera()->setProjectionMatrix(getEffectiveFrustum(viewer).getMatrix(osg::Vec2(10, 8e4)));
  83         return SlaveCamera::_updateImplementation(viewer);
  84     }
  85 };
  86
  87 Renderer::Renderer()
  88 {
  89 }
  90
  91 Renderer::~Renderer()
  92 {
  93 }
  94
  95 Drawable*
  96 Renderer::createDrawable(Viewer&, const std::string& name)
  97 {
  98     return new Drawable(name);
  99 }
 100
 101 SlaveCamera*
 102 Renderer::createSlaveCamera(Viewer&, const std::string& name)
 103 {
 104     return new _SlaveCamera(name);
 105 }
 106
 107 bool
 108 Renderer::realize(Viewer& viewer)
 109 {
 110     if (!viewer.realizeDrawables())
 111         return false;
 112     return viewer.realizeSlaveCameras();
 113 }
 114
 115 bool
 116 Renderer::update(Viewer& viewer)
 117 {
 118     return viewer.updateSlaveCameras();
 119 }
 120
 121 } // namespace fgviewer