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/* -*-c++-*- OpenSceneGraph example, osgposter.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <osg/ArgumentParser>
#include <osg/Texture2D>
#include <osg/Switch>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgGA/TrackballManipulator>
#include <osgGA/StateSetManipulator>
#include <osgViewer/Renderer>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <iostream>
#include "PosterPrinter.h"
/* Computing view matrix helpers */
template<class T>
class FindTopMostNodeOfTypeVisitor : public osg::NodeVisitor
{
public:
FindTopMostNodeOfTypeVisitor()
: osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
_foundNode(0)
{}
void apply( osg::Node& node )
{
T* result = dynamic_cast<T*>( &node );
if ( result ) _foundNode = result;
else traverse( node );
}
T* _foundNode;
};
template<class T>
T* findTopMostNodeOfType( osg::Node* node )
{
if ( !node ) return 0;
FindTopMostNodeOfTypeVisitor<T> fnotv;
node->accept( fnotv );
return fnotv._foundNode;
}
/* Computing view matrix functions */
void computeViewMatrix( osg::Camera* camera, const osg::Vec3d& eye, const osg::Vec3d& hpr )
{
osg::Matrixd matrix;
matrix.makeTranslate( eye );
matrix.preMult( osg::Matrixd::rotate( hpr[0], 0.0, 1.0, 0.0) );
matrix.preMult( osg::Matrixd::rotate( hpr[1], 1.0, 0.0, 0.0) );
matrix.preMult( osg::Matrixd::rotate( hpr[2], 0.0, 0.0, 1.0) );
camera->setViewMatrix( osg::Matrixd::inverse(matrix) );
}
void computeViewMatrixOnEarth( osg::Camera* camera, osg::Node* scene,
const osg::Vec3d& latLongHeight, const osg::Vec3d& hpr )
{
osg::CoordinateSystemNode* csn = findTopMostNodeOfType<osg::CoordinateSystemNode>(scene);
if ( !csn ) return;
// Compute eye point in world coordiantes
osg::Vec3d eye;
csn->getEllipsoidModel()->convertLatLongHeightToXYZ(
latLongHeight.x(), latLongHeight.y(), latLongHeight.z(), eye.x(), eye.y(), eye.z() );
// Build matrix for computing target vector
osg::Matrixd target_matrix =
osg::Matrixd::rotate( -hpr.x(), osg::Vec3d(1,0,0),
-latLongHeight.x(), osg::Vec3d(0,1,0),
latLongHeight.y(), osg::Vec3d(0,0,1) );
// Compute tangent vector
osg::Vec3d tangent = target_matrix.preMult( osg::Vec3d(0,0,1) );
// Compute non-inclined, non-rolled up vector
osg::Vec3d up( eye );
up.normalize();
// Incline by rotating the target- and up vector around the tangent/up-vector
// cross-product
osg::Vec3d up_cross_tangent = up ^ tangent;
osg::Matrixd incline_matrix = osg::Matrixd::rotate( hpr.y(), up_cross_tangent );
osg::Vec3d target = incline_matrix.preMult( tangent );
// Roll by rotating the up vector around the target vector
osg::Matrixd roll_matrix = incline_matrix * osg::Matrixd::rotate( hpr.z(), target );
up = roll_matrix.preMult( up );
camera->setViewMatrixAsLookAt( eye, eye+target, up );
}
/* CustomRenderer: Do culling only while loading PagedLODs */
class CustomRenderer : public osgViewer::Renderer
{
public:
CustomRenderer( osg::Camera* camera )
: osgViewer::Renderer(camera), _cullOnly(true)
{
}
void setCullOnly(bool on) { _cullOnly = on; }
virtual void operator ()( osg::GraphicsContext* )
{
if ( _graphicsThreadDoesCull )
{
if (_cullOnly) cull();
else cull_draw();
}
}
virtual void cull()
{
osgUtil::SceneView* sceneView = _sceneView[0].get();
if ( !sceneView || _done || _graphicsThreadDoesCull )
return;
updateSceneView( sceneView );
osgViewer::View* view = dynamic_cast<osgViewer::View*>( _camera->getView() );
if ( view )
sceneView->setFusionDistance( view->getFusionDistanceMode(), view->getFusionDistanceValue() );
sceneView->inheritCullSettings( *(sceneView->getCamera()) );
sceneView->cull();
}
bool _cullOnly;
};
/* PrintPosterHandler: A gui handler for interactive high-res capturing */
class PrintPosterHandler : public osgGA::GUIEventHandler
{
public:
PrintPosterHandler( PosterPrinter* printer )
: _printer(printer), _started(false) {}
bool handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa )
{
osgViewer::View* view = dynamic_cast<osgViewer::View*>( &aa );
if ( !view ) return false;
switch( ea.getEventType() )
{
case osgGA::GUIEventAdapter::FRAME:
if ( view->getDatabasePager() )
{
// Wait until all paged nodes are processed
if ( view->getDatabasePager()->getRequestsInProgress() )
break;
}
if ( _printer.valid() )
{
_printer->frame( view->getFrameStamp(), view->getSceneData() );
if ( _started && _printer->done() )
{
osg::Switch* root = dynamic_cast<osg::Switch*>( view->getSceneData() );
if ( root )
{
// Assume child 0 is the loaded model and 1 is the poster camera
// Switch them in time to prevent dual traversals of subgraph
root->setValue( 0, true );
root->setValue( 1, false );
}
_started = false;
}
}
break;
case osgGA::GUIEventAdapter::KEYDOWN:
if ( ea.getKey()=='p' || ea.getKey()=='P' )
{
if ( _printer.valid() )
{
osg::Switch* root = dynamic_cast<osg::Switch*>( view->getSceneData() );
if ( root )
{
// Assume child 0 is the loaded model and 1 is the poster camera
root->setValue( 0, false );
root->setValue( 1, true );
}
_printer->init( view->getCamera() );
_started = true;
}
return true;
}
break;
default:
break;
}
return false;
}
protected:
osg::ref_ptr<PosterPrinter> _printer;
bool _started;
};
/* The main entry */
int main( int argc, char** argv )
{
osg::ArgumentParser arguments( &argc, argv );
osg::ApplicationUsage* usage = arguments.getApplicationUsage();
usage->setDescription( arguments.getApplicationName() +
" is the example which demonstrates how to render high-resolution images (posters).");
usage->setCommandLineUsage( arguments.getApplicationName() + " [options] scene_file" );
usage->addCommandLineOption( "-h or --help", "Display this information." );
usage->addCommandLineOption( "--color <r> <g> <b>", "The background color." );
usage->addCommandLineOption( "--ext <ext>", "The output tiles' extension (Default: bmp)." );
usage->addCommandLineOption( "--poster <filename>", "The output poster's name (Default: poster.bmp)." );
usage->addCommandLineOption( "--tilesize <w> <h>", "Size of each image tile (Default: 640 480)." );
usage->addCommandLineOption( "--finalsize <w> <h>", "Size of the poster (Default: 6400 4800)." );
usage->addCommandLineOption( "--enable-output-poster", "Output the final poster file (Default)." );
usage->addCommandLineOption( "--disable-output-poster", "Don't output the final poster file." );
usage->addCommandLineOption( "--enable-output-tiles", "Output all tile files." );
usage->addCommandLineOption( "--disable-output-tiles", "Don't output all tile files (Default)." );
usage->addCommandLineOption( "--use-fb", "Use Frame Buffer for rendering tiles (Default, recommended).");
usage->addCommandLineOption( "--use-fbo", "Use Frame Buffer Object for rendering tiles.");
usage->addCommandLineOption( "--use-pbuffer","Use Pixel Buffer for rendering tiles.");
usage->addCommandLineOption( "--use-pbuffer-rtt","Use Pixel Buffer RTT for rendering tiles.");
usage->addCommandLineOption( "--inactive", "Inactive capturing mode." );
usage->addCommandLineOption( "--camera-eye <x> <y> <z>", "Set eye position in inactive mode." );
usage->addCommandLineOption( "--camera-latlongheight <lat> <lon> <h>", "Set eye position on earth in inactive mode." );
usage->addCommandLineOption( "--camera-hpr <h> <p> <r>", "Set eye rotation in inactive mode." );
if ( arguments.read("-h") || arguments.read("--help") )
{
usage->write( std::cout );
return 1;
}
// Poster arguments
bool activeMode = true;
bool outputPoster = true, outputTiles = false;
int tileWidth = 640, tileHeight = 480;
int posterWidth = 640*2, posterHeight = 480*2;
std::string posterName = "poster.bmp", extName = "bmp";
osg::Vec4 bgColor(0.2f, 0.2f, 0.6f, 1.0f);
osg::Camera::RenderTargetImplementation renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT;
while ( arguments.read("--inactive") ) { activeMode = false; }
while ( arguments.read("--color", bgColor.r(), bgColor.g(), bgColor.b()) ) {}
while ( arguments.read("--tilesize", tileWidth, tileHeight) ) {}
while ( arguments.read("--finalsize", posterWidth, posterHeight) ) {}
while ( arguments.read("--poster", posterName) ) {}
while ( arguments.read("--ext", extName) ) {}
while ( arguments.read("--enable-output-poster") ) { outputPoster = true; }
while ( arguments.read("--disable-output-poster") ) { outputPoster = false; }
while ( arguments.read("--enable-output-tiles") ) { outputTiles = true; }
while ( arguments.read("--disable-output-tiles") ) { outputTiles = false; }
while ( arguments.read("--use-fbo")) { renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT; }
while ( arguments.read("--use-pbuffer")) { renderImplementation = osg::Camera::PIXEL_BUFFER; }
while ( arguments.read("--use-pbuffer-rtt")) { renderImplementation = osg::Camera::PIXEL_BUFFER_RTT; }
while ( arguments.read("--use-fb")) { renderImplementation = osg::Camera::FRAME_BUFFER; }
// Camera settings for inactive screenshot
bool useLatLongHeight = true;
osg::Vec3d eye;
osg::Vec3d latLongHeight( 50.0, 10.0, 2000.0 );
osg::Vec3d hpr( 0.0, 0.0, 0.0 );
if ( arguments.read("--camera-eye", eye.x(), eye.y(), eye.z()) )
{
useLatLongHeight = false;
activeMode = false;
}
else if ( arguments.read("--camera-latlongheight", latLongHeight.x(), latLongHeight.y(), latLongHeight.z()) )
{
activeMode = false;
latLongHeight.x() = osg::DegreesToRadians( latLongHeight.x() );
latLongHeight.y() = osg::DegreesToRadians( latLongHeight.y() );
}
if ( arguments.read("--camera-hpr", hpr.x(), hpr.y(), hpr.z()) )
{
activeMode = false;
hpr.x() = osg::DegreesToRadians( hpr.x() );
hpr.y() = osg::DegreesToRadians( hpr.y() );
hpr.z() = osg::DegreesToRadians( hpr.z() );
}
// Construct scene graph
osg::Node* scene = osgDB::readNodeFiles( arguments );
if ( !scene ) scene = osgDB::readNodeFile( "cow.osgt" );
if ( !scene )
{
std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
return 1;
}
// Create camera for rendering tiles offscreen. FrameBuffer is recommended because it requires less memory.
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setClearColor( bgColor );
camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
camera->setReferenceFrame( osg::Transform::ABSOLUTE_RF );
camera->setRenderOrder( osg::Camera::PRE_RENDER );
camera->setRenderTargetImplementation( renderImplementation );
camera->setViewport( 0, 0, tileWidth, tileHeight );
camera->addChild( scene );
// Set the printer
osg::ref_ptr<PosterPrinter> printer = new PosterPrinter;
printer->setTileSize( tileWidth, tileHeight );
printer->setPosterSize( posterWidth, posterHeight );
printer->setCamera( camera.get() );
osg::ref_ptr<osg::Image> posterImage = 0;
if ( outputPoster )
{
posterImage = new osg::Image;
posterImage->allocateImage( posterWidth, posterHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE );
printer->setFinalPoster( posterImage.get() );
printer->setOutputPosterName( posterName );
}
#if 0
// While recording sub-images of the poster, the scene will always be traversed twice, from its two
// parent node: root and camera. Sometimes this may not be so comfortable.
// To prevent this behaviour, we can use a switch node to enable one parent and disable the other.
// However, the solution also needs to be used with care, as the window will go blank while taking
// snapshots and recover later.
osg::ref_ptr<osg::Switch> root = new osg::Switch;
root->addChild( scene, true );
root->addChild( camera.get(), false );
#else
osg::ref_ptr<osg::Group> root = new osg::Group;
root->addChild( scene );
root->addChild( camera.get() );
#endif
osgViewer::Viewer viewer;
viewer.setSceneData( root.get() );
viewer.getDatabasePager()->setDoPreCompile( false );
if ( renderImplementation==osg::Camera::FRAME_BUFFER )
{
// FRAME_BUFFER requires the window resolution equal or greater than the to-be-copied size
viewer.setUpViewInWindow( 100, 100, tileWidth, tileHeight );
}
else
{
// We want to see the console output, so just render in a window
viewer.setUpViewInWindow( 100, 100, 800, 600 );
}
if ( activeMode )
{
viewer.addEventHandler( new PrintPosterHandler(printer.get()) );
viewer.addEventHandler( new osgViewer::StatsHandler );
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
viewer.setCameraManipulator( new osgGA::TrackballManipulator );
viewer.run();
}
else
{
osg::Camera* camera = viewer.getCamera();
if ( !useLatLongHeight ) computeViewMatrix( camera, eye, hpr );
else computeViewMatrixOnEarth( camera, scene, latLongHeight, hpr );
osg::ref_ptr<CustomRenderer> renderer = new CustomRenderer( camera );
camera->setRenderer( renderer.get() );
viewer.setThreadingModel( osgViewer::Viewer::SingleThreaded );
// Realize and initiate the first PagedLOD request
viewer.realize();
viewer.frame();
printer->init( camera );
while ( !printer->done() )
{
viewer.advance();
// Keep updating and culling until full level of detail is reached
renderer->setCullOnly( true );
while ( viewer.getDatabasePager()->getRequestsInProgress() )
{
viewer.updateTraversal();
viewer.renderingTraversals();
}
renderer->setCullOnly( false );
printer->frame( viewer.getFrameStamp(), viewer.getSceneData() );
viewer.renderingTraversals();
}
}
return 0;
}
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