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Added experiment depth partioning support in the form of an slave camera configuration.

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This commit is contained in:
Robert Osfield 2011-03-01 14:50:25 +00:00
parent 1525f3cd4e
commit a471d8ac30
1 changed files with 151 additions and 1 deletions
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152
examples/osgshadow/osgshadow.cpp
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@ -568,6 +568,150 @@ osg::Node* createTestModel(osg::ArgumentParser& arguments)
}
struct MyUpdateSlaveCallback : public osg::View::Slave::UpdateSlaveCallback
{
MyUpdateSlaveCallback(double nr, double fr):_zNear(nr),_zFar(fr) {}
virtual void updateSlave(osg::View& view, osg::View::Slave& slave)
{
slave.updateSlaveImplementation(view);
osg::Camera* camera = slave._camera.get();
//camera->setProjectionMatrixAsOrtho(-1,1,-1,1,1,1000);
if (camera->getProjectionMatrix()(0,3)==0.0 &&
camera->getProjectionMatrix()(1,3)==0.0 &&
camera->getProjectionMatrix()(2,3)==0.0)
{
//OSG_NOTICE<<"MyUpdateSlaveCallback othographic camera"<<std::endl;
double left, right, bottom, top, zNear, zFar;
camera->getProjectionMatrixAsOrtho(left, right, bottom, top, zNear, zFar);
camera->setProjectionMatrixAsOrtho(left, right, bottom, top, _zNear, _zFar);
}
else
{
double left, right, bottom, top, zNear, zFar;
camera->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
//OSG_NOTICE<<"MyUpdateSlaveCallback perpective camera zNear="<<zNear<<", zFar="<<zFar<<std::endl;
double nr = _zNear / zNear;
camera->setProjectionMatrixAsFrustum(left * nr, right * nr, bottom * nr, top * nr, _zNear, _zFar);
}
}
double _zNear, _zFar;
};
void setUpViewForDepthPartion(osgViewer::Viewer& viewer, double partitionPosition)
{
OSG_NOTICE<<"setUpViewForDepthPartion(Viewer, "<<partitionPosition<<std::endl;
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
OSG_NOTICE<<"View::setUpViewAcrossAllScreens() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
osg::GraphicsContext::ScreenIdentifier si(0);
si.readDISPLAY();
// displayNum has not been set so reset it to 0.
if (si.displayNum<0) si.displayNum = 0;
if (si.screenNum<0) si.screenNum = 0;
unsigned int width = 1280, height = 1024;
wsi->getScreenResolution(si, width, height);
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->screenNum = 0;
traits->x = 0;
traits->y = 0;
traits->width = width;
traits->height = height;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (gc.valid())
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
}
else
{
osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
}
#if 0
osg::Camera* camera = viewer.getCamera();
camera->setGraphicsContext(gc);
camera->setViewport(new osg::Viewport(0,0, width, height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
#else
double zNear = 0.5;
double zMid = 10.0;
double zFar = 200.0;
// far camera
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc);
camera->setViewport(new osg::Viewport(0,0, width, height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
double scale_z = 1.0;
double translate_z = 0.0;
camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
camera->setCullingMode(osg::Camera::ENABLE_ALL_CULLING);
viewer.addSlave(camera.get(), osg::Matrix::scale(1.0, 1.0, scale_z)*osg::Matrix::translate(0.0, 0.0, translate_z), osg::Matrix() );
osg::View::Slave& slave = viewer.getSlave(viewer.getNumSlaves()-1);
slave._updateSlaveCallback = new MyUpdateSlaveCallback(zMid, zFar);
}
// near camera
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc);
camera->setViewport(new osg::Viewport(0,0, width, height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
double scale_z = 1.0;
double translate_z = 0.0;
camera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
camera->setCullingMode(osg::Camera::ENABLE_ALL_CULLING);
camera->setClearMask(GL_DEPTH_BUFFER_BIT);
viewer.addSlave(camera.get(), osg::Matrix::scale(1.0, 1.0, scale_z)*osg::Matrix::translate(0.0, 0.0, translate_z), osg::Matrix() );
osg::View::Slave& slave = viewer.getSlave(viewer.getNumSlaves()-1);
slave._updateSlaveCallback = new MyUpdateSlaveCallback(zNear, zMid);
}
#endif
}
int main(int argc, char** argv)
{
// use an ArgumentParser object to manage the program arguments.
@ -625,7 +769,13 @@ int main(int argc, char** argv)
arguments.getApplicationUsage()->write(std::cout);
return 1;
}
double partitionPosition = 0.1;
if (arguments.read("--depth-partition",partitionPosition) || arguments.read("--dp"))
{
setUpViewForDepthPartion(viewer,partitionPosition);
}
float fov = 0.0;
while (arguments.read("--fov",fov)) {}