153 lines
5.1 KiB
C++
153 lines
5.1 KiB
C++
// Geo demo written by Geoff Michel, November 2002.
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/* OpenSceneGraph example, osggeodemo.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <osgViewer/Viewer>
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#include <osg/Node>
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#include <osg/Notify>
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#include <osgDB/Registry>
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#include <osgDB/ReadFile>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/DriveManipulator>
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#include <osgGA/AnimationPathManipulator>
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#include <osgDB/WriteFile>
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#include <osgDB/FileUtils>
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#include <osgDB/FileNameUtils>
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#include <osgUtil/Optimizer>
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#include <iostream>
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// currently not a satisfactory solution, but this is early days for the
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// geo loader and having direct links with it.
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#include "../../src/osgPlugins/geo/osgGeoAnimation.h"
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//== event trapper gets events
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class geodemoEventHandler : public osgGA::GUIEventHandler
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{
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public:
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geodemoEventHandler( ) { mouse_x=mouse_y=0;}
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virtual ~geodemoEventHandler( ) {}
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
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{
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mouse_x=ea.getX();
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mouse_y=ea.getY();
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return false;
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}
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inline float getMouseX(void) {return mouse_x;};
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inline float getMouseY(void) {return mouse_y;};
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private:
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float mouse_x, mouse_y;
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};
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static geodemoEventHandler *ghand=NULL;
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inline double DEG2RAD(const double val) { return val*0.0174532925199432957692369076848861;}
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inline double RAD2DEG(const double val) { return val*57.2957795130823208767981548141052;}
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double dodynamics(const double /*time*/, const double val, const std::string name)
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{ // Each local variable named 'name' declared in the geo modeller is passed into here.
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// its current value is val; returns new value. Time - elapsed time
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static double heading,speed; // these are only required for my 'dynamics'
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if (name == "xpos") {
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return (val+speed*sin(heading));
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// std::cout << " nx " << (*itr->getValue()) ;
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} else if (name == "ypos") {
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return (val+speed*cos(heading));
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// std::cout << " ny " << (*itr->getValue()) ;
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} else if (name == "sped") {
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speed=(0.00025*(ghand->getMouseY()-300)); // (*itr->getValue());
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return (speed);
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} else if (name == "heading") {
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heading-= 0.01*DEG2RAD(ghand->getMouseX()-400); // =DEG2RAD(*itr->getValue());
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return (RAD2DEG(heading));
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} else if (name == "conerot") {
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return ((ghand->getMouseX()-400));
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} else if (name == "planrot") {
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return ((ghand->getMouseY()-300)/200.0);
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} else if (name == "secint" || name == "minutehand"|| name == "hourhand") {
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// std::cout << " updating " << name << " " << val << std::endl;
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}
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return val;
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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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// construct the viewer.
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osgViewer::Viewer viewer;
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// load the nodes from the commandline arguments.
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osg::Node* rootnode = osgDB::readNodeFiles(arguments);
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if (!rootnode)
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{
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osg::notify(osg::NOTICE)<<"Please specify and geo model filename on the command line."<<std::endl;
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return 1;
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}
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// run optimization over the scene graph
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osgUtil::Optimizer optimzer;
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optimzer.optimize(rootnode);
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// add a viewport to the viewer and attach the scene graph.
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viewer.setSceneData( rootnode );
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geoHeader *gh = dynamic_cast<geoHeader *>(rootnode);
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if (gh)
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{ // it is a geo file, so set function to update its animation variables.
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ghand=new geodemoEventHandler();
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gh->setUserUpdate(dodynamics);
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viewer.addEventHandler(ghand);
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}
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else
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{ // maybe a group with geo models below.
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osg::Group *gpall=dynamic_cast<osg::Group *>(rootnode);
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if (gpall)
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{
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int nchild=gpall->getNumChildren();
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for (int i=0; i<nchild; i++)
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{
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osg::Node *nod=gpall->getChild(i);
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gh = dynamic_cast<geoHeader *>(nod);
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if (gh)
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{
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ghand=new geodemoEventHandler();
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gh->setUserUpdate(dodynamics);
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viewer.addEventHandler(ghand);
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}
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}
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}
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}
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return viewer.run();
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}
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