329 lines
8.0 KiB
C++
329 lines
8.0 KiB
C++
/*
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Steffen Frey
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Fachpraktikum Graphik-Programmierung 2007
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Institut fuer Visualisierung und Interaktive Systeme
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Universitaet Stuttgart
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*/
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#include <osg/GLExtensions>
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#include <osg/Node>
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#include <osg/Geometry>
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#include <osg/Notify>
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#include <osg/MatrixTransform>
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#include <osg/AnimationPath>
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#include <osgDB/ReadFile>
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#include <osgViewer/Viewer>
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#include <osgGA/TrackballManipulator>
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#include <iostream>
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#include "DePee.h"
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/*!
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Handles keyboard events.
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Maintains a copy of the DePee object and part of its internal state
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Used for example to set sketchiness, color, add or remove a depth peeling pass
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*/
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class KeyboardEventHandler : public osgGA::GUIEventHandler
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{
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public:
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KeyboardEventHandler(DePee* dePee)
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{
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_apc = 0;
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_dePee = dePee;
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_sketchy = false;
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_sketchiness = 1.0;
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_colored = false;
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_edgy = true;
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_crayon = false;
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_dePee->setSketchy(_sketchy);
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_dePee->setColored(_colored);
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}
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
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{
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::KEYDOWN):
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{
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if (ea.getKey()==osgGA::GUIEventAdapter::KEY_Space)
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{
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if(_apc)
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_apc->setPause(!_apc->getPause());
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return true;
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}
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else if (ea.getKey() == 'a')
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{
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_dePee->addDePeePass();
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return true;
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}
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else if (ea.getKey() == 'r')
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{
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_dePee->remDePeePass();
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return true;
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}
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else if (ea.getKey() == 'c')
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{
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_colored = !_colored;
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_dePee->setColored(_colored);
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return true;
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}
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else if (ea.getKey() == 's')
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{
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_sketchy = !_sketchy;
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_dePee->setSketchy(_sketchy);
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return true;
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}
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else if (ea.getKey() == 'e')
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{
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_edgy = !_edgy;
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_dePee->setEdgy(_edgy);
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return true;
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}
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else if (ea.getKey() == 'f')
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{
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return true;
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}
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else if (ea.getKey() == '+')
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{
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_sketchiness += 0.5;
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_dePee->setSketchiness(_sketchiness);
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}
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else if (ea.getKey() == '-')
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{
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_sketchiness -= 0.5;
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if(_sketchiness < 0.0)
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_sketchiness = 0.0;
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_dePee->setSketchiness(_sketchiness);
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}
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else if (ea.getKey() == 'y')
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{
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_crayon = !_crayon;
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_dePee->setCrayon(_crayon);
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}
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break;
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}
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default:
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break;
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}
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return false;
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}
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void registerAnimationPathCallback(osg::AnimationPathCallback* apc)
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{
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_apc = apc;
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}
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private:
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DePee* _dePee;
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bool _sketchy;
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bool _colored;
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bool _edgy;
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bool _crayon;
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double _sketchiness;
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osg::AnimationPathCallback* _apc;
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};
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/*!
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Handles mouse events.
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Maintains a copy of the DePee object and part of its internal state
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Used to rotate the object
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*/
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class MouseEventHandler : public osgGA::GUIEventHandler
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{
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public:
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MouseEventHandler(DePee* dePee)
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{
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_dePee = dePee;
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}
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
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{
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switch(ea.getEventType())
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{
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//mouse
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case(osgGA::GUIEventAdapter::DRAG):
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{
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rotate(ea.getXnormalized(), ea.getYnormalized());
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break;
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}
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case(osgGA::GUIEventAdapter::MOVE):
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_prevX = ea.getXnormalized();
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_prevY = ea.getYnormalized();
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break;
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default:
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break;
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}
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return false;
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}
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void registerModelGroupTransform(osg::MatrixTransform* modelGroupTransform)
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{
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_modelGroupTransform = modelGroupTransform;
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_rotCenter = modelGroupTransform->getBound().center();
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}
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private:
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void rotate(float x, float y)
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{
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osg::Matrixd baseMatrix = _modelGroupTransform->getMatrix();
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osg::Matrixd preTransMatrix;
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osg::Matrixd postTransMatrix;
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osg::Matrixd rotMatrixX;
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osg::Matrixd rotMatrixZ;
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preTransMatrix.makeTranslate(_rotCenter);
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postTransMatrix.makeTranslate(-_rotCenter);
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rotMatrixZ.makeRotate((x - _prevX) * 3., osg::Vec3d(0.0, 0.0,1.0));
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baseMatrix.preMult(preTransMatrix);
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baseMatrix.preMult(rotMatrixZ);
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baseMatrix.preMult(postTransMatrix);
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rotMatrixX.makeRotate(-(y - _prevY) * 3., (baseMatrix * osg::Vec3d(1.0, 0.0,0.0)));
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baseMatrix.preMult(preTransMatrix);
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baseMatrix.preMult(rotMatrixX);
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baseMatrix.preMult(postTransMatrix);
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_modelGroupTransform->setMatrix(baseMatrix);
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_prevX = x;
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_prevY = y;
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};
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DePee* _dePee;
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float _prevX;
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float _prevY;
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osg::Vec3 _rotCenter;
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osg::MatrixTransform* _modelGroupTransform;
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};
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int main( int argc, char **argv )
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates Depth Peeling");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" filename");
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// construct the viewer
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osgViewer::Viewer viewer(arguments);
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// any option left unread are converted into errors to write out later.
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arguments.reportRemainingOptionsAsUnrecognized();
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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if (arguments.argc()<=1 || arguments.argc() > 3)
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{
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arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
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return 1;
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}
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//only displays a textured quad
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viewer.getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
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// read the model to do depth peeling with
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osg::Node* loadedModel = osgDB::readNodeFile(arguments.argv()[1]);
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if (!loadedModel)
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return 1;
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// create a transform to spin the model.
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osg::MatrixTransform* modelGroupTransform = new osg::MatrixTransform;
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osg::Group* modelGroup = new osg::Group;
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modelGroupTransform->addChild(modelGroup);
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modelGroup->addChild(loadedModel);
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osg::Group* rootNode = new osg::Group();
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// add model to the viewer.
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viewer.setSceneData(rootNode);
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// Depth peel example only works on a single graphics context right now
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// so open up viewer on single screen to prevent problems
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viewer.setUpViewOnSingleScreen(0);
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// create the windows and run the threads.
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viewer.realize();
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unsigned int width = 1280;
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unsigned int height = 1280;
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osgViewer::Viewer::Windows windows;
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viewer.getWindows(windows);
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if (!windows.empty())
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{
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width = windows.front()->getTraits()->width;
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height = windows.front()->getTraits()->height;
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}
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osg::ref_ptr<DePee> dePee = new DePee(rootNode,
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modelGroupTransform,
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width,
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height);
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//create event handlers
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KeyboardEventHandler* keyboardEventHandler = new KeyboardEventHandler(dePee.get());
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MouseEventHandler* mouseEventHandler = new MouseEventHandler(dePee.get());
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viewer.addEventHandler(keyboardEventHandler);
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viewer.addEventHandler(mouseEventHandler);
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//viewer.setCameraManipulator(new osgGA::TrackballManipulator);
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osg::StateSet* stateset = modelGroupTransform->getOrCreateStateSet();
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stateset->setMode(GL_BLEND, osg::StateAttribute::OFF);
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//create new animation callback for autmatic object rotation
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osg::AnimationPathCallback* apc = new osg::AnimationPathCallback(modelGroupTransform->getBound().center(),osg::Vec3(0.0f,0.0f,1.0f),osg::inDegrees(45.0f));
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apc->setPause(true);
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modelGroupTransform->setUpdateCallback(apc);
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keyboardEventHandler->registerAnimationPathCallback(apc);
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mouseEventHandler->registerModelGroupTransform(modelGroupTransform);
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//setup stuff that is necessary for measuring fps
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osg::Timer_t current_tick, previous_tick = 1;
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double* fps = new double;
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dePee->setFPS(fps);
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while(!viewer.done())
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{
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current_tick = osg::Timer::instance()->tick();
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*fps = 1.0/osg::Timer::instance()->delta_s(previous_tick,current_tick);
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dePee->updateHUDText();
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previous_tick = current_tick;
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// fire off the cull and draw traversals of the scene.
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viewer.frame();
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}
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return 0;
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}
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