FGFS-4.1/OpenSceneGraph
3
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added bare bones osgGA::SimpleViewer class to help simplify OSG setup when embedding the OSG

Browse Source 
into existing GUI applications, and for one one a single camera, single window is required.
This commit is contained in:
Robert Osfield
2006-09-25 16:25:53 +00:00
parent 78444878c3
commit 5c0eb0b013
17 changed files with 552 additions and 179 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
examples/osgsimple/osgsimple.cpp
View File

@@ -4,9 +4,10 @@
// graphics window, and OSG for rendering.
#include <Producer/RenderSurface>
#include <osg/Timer>
#include <osgUtil/SceneView>
#include <osgDB/ReadFile>
#include <osgGA/SimpleViewer>
int main( int argc, char **argv )
@@ -32,46 +33,26 @@ int main( int argc, char **argv )
renderSurface->useBorder(true);
renderSurface->realize();
// create the view of the scene.
osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;
sceneView->setDefaults();
sceneView->setSceneData(loadedModel.get());
osgGA::SimpleViewer viewer;
viewer.setSceneData(loadedModel.get());
// initialize the view to look at the center of the scene graph
const osg::BoundingSphere& bs = loadedModel->getBound();
osg::Matrix viewMatrix;
viewMatrix.makeLookAt(bs.center()-osg::Vec3(0.0,2.0f*bs.radius(),0.0),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
// record the timer tick at the start of rendering.
osg::Timer_t start_tick = osg::Timer::instance()->tick();
unsigned int frameNum = 0;
// main loop (note, window toolkits which take control over the main loop will require a window redraw callback containing the code below.)
while( renderSurface->isRealized() )
{
// set up the frame stamp for current frame to record the current time and frame number so that animtion code can advance correctly
osg::ref_ptr<osg::FrameStamp> frameStamp = new osg::FrameStamp;
frameStamp->setReferenceTime(osg::Timer::instance()->delta_s(start_tick,osg::Timer::instance()->tick()));
frameStamp->setFrameNumber(frameNum++);
// pass frame stamp to the SceneView so that the update, cull and draw traversals all use the same FrameStamp
sceneView->setFrameStamp(frameStamp.get());
// update the viewport dimensions, incase the window has been resized.
sceneView->setViewport(0,0,renderSurface->getWindowWidth(),renderSurface->getWindowHeight());
// set the view
sceneView->setViewMatrix(viewMatrix);
{
// update the window dimensions, in case the window has been resized.
viewer.getEventQueue()->windowResize(0,0,renderSurface->getWindowWidth(),renderSurface->getWindowHeight());
// do the update traversal the scene graph - such as updating animations
sceneView->update();
// set the view
viewer.getCamera()->setViewMatrix(viewMatrix);
// do the cull traversal, collect all objects in the view frustum into a sorted set of rendering bins
sceneView->cull();
// draw the rendering bins.
sceneView->draw();
// advance the frame, handle events, update the scene and render it.
viewer.frame();
// Swap Buffers
renderSurface->swapBuffers();