Changeset 3934 for OpenSceneGraph/trunk/examples/osgspheresegment/osgspheresegment.cpp

Timestamp:

03/22/05 13:11:03 (8 years ago)

Author:

robert

Message:

Updated sphere segment example to use original osgsimulation source, adding
in terrain, moving models and particle effects.

Files:

• OpenSceneGraph/trunk/examples/osgspheresegment/osgspheresegment.cpp (modified) (3 diffs)

OpenSceneGraph/trunk/examples/osgspheresegment/osgspheresegment.cpp

@@ +1 @@
+#include <osgProducer/Viewer>
+
+#include <osg/Group>
 #include <osg/Geode>
 #include <osg/ShapeDrawable>
-#include <osg/Material>
 #include <osg/Texture2D>
-#include <osg/Geometry>
+#include <osg/PositionAttitudeTransform>
 #include <osg/MatrixTransform>
-#include <osg/PositionAttitudeTransform>
-#include <osg/BlendFunc>
-#include <osg/ClearNode>
-
-#include <osgUtil/Tesselator>
-#include <osgUtil/TransformCallback>
-#include <osgUtil/CullVisitor>
+
+#include <osgDB/ReadFile>
 
 #include <osgText/Text>
 
-#include <osgGA/TrackballManipulator>
-#include <osgProducer/Viewer>
-#include <osgDB/ReadFile>
-
 #include <osgSim/SphereSegment>
 
-using namespace osgSim;
-
-class MyNodeCallback: public osg::NodeCallback
-{
-    void operator()(osg::Node*,osg::NodeVisitor*);
-};
-
-// void MyNodeCallback::operator()(osg::Node* n,osg::NodeVisitor* nv)
-// {
-//     if(osgSim::SphereSegment* ss=dynamic_cast<osgSim::SphereSegment*>(n))
-//     {
-//         osg::Vec3 vec;
-//         float azRange, elevRange;
-//         ss->getArea(vec,azRange,elevRange);
-//
-//         float azRangeDeg = osg::RadiansToDegrees(azRange);
-//
-//         static bool azAscending = false;
-//
-//         if(azAscending){
-//             azRangeDeg += 1.0f;
-//             if(azRangeDeg>89.0f) azAscending = false;
-//         }else{
-//             azRangeDeg -= 1.0f;
-//             if(azRangeDeg<2.0f) azAscending = true;
-//         }
-//
-//         ss->setArea(vec,osg::DegreesToRadians(azRangeDeg),elevRange);
-//
-//     }
-//     traverse(n,nv);
-// }
-
-void MyNodeCallback::operator()(osg::Node* n,osg::NodeVisitor* nv)
-{
-    if(osgSim::SphereSegment* ss=dynamic_cast<osgSim::SphereSegment*>(n))
-    {
-        osg::Vec3 vec;
-        float azRange, elevRange;
-        ss->getArea(vec,azRange,elevRange);
-
-        static float angle = 0.0f;
-        if(++angle > 359.0f) angle = 0.0f;
-        vec.set(sin(osg::DegreesToRadians(angle)),cos(osg::DegreesToRadians(angle)),0.0f);
-
-        std::cout<<"angle "<<angle<<" degrees, vec is "<<vec
-                        <<", azRange is "<<osg::RadiansToDegrees(azRange)
-                        <<", elevRange is "<<osg::RadiansToDegrees(elevRange)
-                        <<std::endl;
-
-        ss->setArea(vec,azRange,elevRange);
-    }
-    traverse(n,nv);
-}
-
-osg::Node* createSphereSegment()
-{
-    SphereSegment* ss = new SphereSegment(osg::Vec3(0.0f,0.0f,0.0f), 1.0f,
-                    osg::Vec3(0.0f,1.0f,0.0f),
-                    osg::DegreesToRadians(90.0f),
-                    osg::DegreesToRadians(45.0f),
-                    60);
-    ss->setAllColors(osg::Vec4(1.0f,1.0f,1.0f,0.5f));
-    ss->setSideColor(osg::Vec4(0.0f,0.0f,1.0f,0.5f));
-    //ss->setDrawMask(SphereSegment::DrawMask(SphereSegment::SPOKES | SphereSegment::EDGELINE));
-
-    //ss->setUpdateCallback(new MyNodeCallback);
-
-    return ss;
-}
-
-int main( int argc, char **argv )
+#include <osgParticle/ExplosionEffect>
+#include <osgParticle/SmokeEffect>
+#include <osgParticle/FireEffect>
+#include <osgParticle/ParticleSystemUpdater>
+
+// for the grid data..
+#include "../osghangglide/terrain_coords.h"
+
+osg::AnimationPath* createAnimationPath(const osg::Vec3& center,float radius,double looptime)
+{
+    // set up the animation path 
+    osg::AnimationPath* animationPath = new osg::AnimationPath;
+    animationPath->setLoopMode(osg::AnimationPath::LOOP);
+    
+    int numSamples = 40;
+    float yaw = 0.0f;
+    float yaw_delta = 2.0f*osg::PI/((float)numSamples-1.0f);
+    float roll = osg::inDegrees(30.0f);
+    
+    double time=0.0f;
+    double time_delta = looptime/(double)numSamples;
+    for(int i=0;i<numSamples;++i)
+    {
+        osg::Vec3 position(center+osg::Vec3(sinf(yaw)*radius,cosf(yaw)*radius,0.0f));
+        osg::Quat rotation(osg::Quat(roll,osg::Vec3(0.0,1.0,0.0))*osg::Quat(-(yaw+osg::inDegrees(90.0f)),osg::Vec3(0.0,0.0,1.0)));
+        
+        animationPath->insert(time,osg::AnimationPath::ControlPoint(position,rotation));
+
+        yaw += yaw_delta;
+        time += time_delta;
+
+    }
+    return animationPath;    
+}
+
+osg::Node* createMovingModel(const osg::Vec3& center, float radius)
+{
+    float animationLength = 10.0f;
+
+    osg::AnimationPath* animationPath = createAnimationPath(center,radius,animationLength);
+
+    osg::Group* model = new osg::Group;
+
+    osg::Node* glider = osgDB::readNodeFile("glider.osg");
+    if (glider)
+    {
+        const osg::BoundingSphere& bs = glider->getBound();
+
+        float size = radius/bs.radius()*0.3f;
+        osg::MatrixTransform* positioned = new osg::MatrixTransform;
+        positioned->setDataVariance(osg::Object::STATIC);
+        positioned->setMatrix(osg::Matrix::translate(-bs.center())*
+                                     osg::Matrix::scale(size,size,size)*
+                                     osg::Matrix::rotate(osg::inDegrees(-90.0f),0.0f,0.0f,1.0f));
+    
+        positioned->addChild(glider);
+    
+        osg::PositionAttitudeTransform* xform = new osg::PositionAttitudeTransform;    
+        xform->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
+        xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0,1.0));
+        xform->addChild(positioned);
+
+        model->addChild(xform);
+    }
+ 
+    osg::Node* cessna = osgDB::readNodeFile("cessna.osg");
+    if (cessna)
+    {
+        const osg::BoundingSphere& bs = cessna->getBound();
+
+        osgText::Text* text = new osgText::Text;
+        float size = radius/bs.radius()*0.3f;
+
+        text->setPosition(bs.center());
+        text->setText("Cessna");
+        text->setAlignment(osgText::Text::CENTER_CENTER);
+        text->setAxisAlignment(osgText::Text::SCREEN);
+        text->setCharacterSize(40.0f);
+        text->setCharacterSizeMode(osgText::Text::SCREEN_COORDS);
+        
+        osg::Geode* geode = new osg::Geode;
+        geode->addDrawable(text);
+    
+        osg::LOD* lod = new osg::LOD;
+        lod->setRangeMode(osg::LOD::PIXEL_SIZE_ON_SCREEN);
+        lod->addChild(geode,0.0f,100.0f);
+        lod->addChild(cessna,100.0f,10000.0f);
+
+
+        osg::MatrixTransform* positioned = new osg::MatrixTransform;
+        positioned->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
+        positioned->setDataVariance(osg::Object::STATIC);
+        positioned->setMatrix(osg::Matrix::translate(-bs.center())*
+                                     osg::Matrix::scale(size,size,size)*
+                                     osg::Matrix::rotate(osg::inDegrees(180.0f),0.0f,0.0f,1.0f));
+    
+        //positioned->addChild(cessna);
+        positioned->addChild(lod);
+    
+        osg::MatrixTransform* xform = new osg::MatrixTransform;
+        xform->setUpdateCallback(new osg::AnimationPathCallback(animationPath,0.0f,2.0));
+        xform->addChild(positioned);
+
+        model->addChild(xform);
+    }
+    
+    return model;
+}
+
+
+osg::Vec3 computeTerrainIntersection(osg::Node* subgraph,float x,float y)
+{
+    osgUtil::IntersectVisitor iv;
+    osg::ref_ptr<osg::LineSegment> segDown = new osg::LineSegment;
+
+    const osg::BoundingSphere& bs = subgraph->getBound();
+    float zMax = bs.center().z()+bs.radius();
+    float zMin = bs.center().z()-bs.radius();
+    
+    segDown->set(osg::Vec3(x,y,zMin),osg::Vec3(x,y,zMax));
+    iv.addLineSegment(segDown.get());
+
+    subgraph->accept(iv);
+
+    if (iv.hits())
+    {
+        osgUtil::IntersectVisitor::HitList& hitList = iv.getHitList(segDown.get());
+        if (!hitList.empty())
+        {
+            osg::Vec3 ip = hitList.front().getWorldIntersectPoint();
+            return  ip;
+        }
+    }
+
+    return osg::Vec3(x,y,0.0f);
+}
+
+
+//////////////////////////////////////////////////////////////////////////////
+// MAIN SCENE GRAPH BUILDING FUNCTION
+//////////////////////////////////////////////////////////////////////////////
+
+void build_world(osg::Group *root)
+{
+
+    osg::Geode* terrainGeode = new osg::Geode;
+    // create terrain
+    {
+        osg::StateSet* stateset = new osg::StateSet();
+        osg::Image* image = osgDB::readImageFile("Images/lz.rgb");
+        if (image)
+        {
+            osg::Texture2D* texture = new osg::Texture2D;
+            texture->setImage(image);
+            stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
+        }
+
+        terrainGeode->setStateSet( stateset );
+
+        float size = 1000; // 10km;
+        float scale = size/39.0f; // 10km;
+        float z_scale = scale*3.0f;
+
+        osg::HeightField* grid = new osg::HeightField;
+        grid->allocateGrid(38,39);
+        grid->setXInterval(scale);
+        grid->setYInterval(scale);
+
+        for(unsigned int r=0;r<39;++r)
+        {
+            for(unsigned int c=0;c<38;++c)
+            {
+                grid->setHeight(c,r,z_scale*vertex[r+c*39][2]);
+            }
+        }
+        terrainGeode->addDrawable(new osg::ShapeDrawable(grid));
+        
+        root->addChild(terrainGeode);
+    }    
+
+    // create sphere segment
+    {
+        osgSim::SphereSegment* ss = new osgSim::SphereSegment(
+                        computeTerrainIntersection(terrainGeode,550.0f,780.0f), // center
+                        500.0f, // radius
+                        osg::DegreesToRadians(135.0f),
+                        osg::DegreesToRadians(245.0f),
+                        osg::DegreesToRadians(-10.0f),
+                        osg::DegreesToRadians(30.0f),
+                        60);
+        ss->setAllColors(osg::Vec4(1.0f,1.0f,1.0f,0.5f));
+        ss->setSideColor(osg::Vec4(0.0f,1.0f,1.0f,0.1f));
+
+        root->addChild(ss);        
+    }
+
+
+    // create particle effects
+    {    
+        osg::PositionAttitudeTransform* positionEffects = new osg::PositionAttitudeTransform;
+        positionEffects->setPosition(computeTerrainIntersection(terrainGeode,100.0f,100.0f));
+        root->addChild(positionEffects);
+
+        osgParticle::ExplosionEffect* explosion = new osgParticle::ExplosionEffect;
+        osgParticle::SmokeEffect* smoke = new osgParticle::SmokeEffect;
+        osgParticle::FireEffect* fire = new osgParticle::FireEffect;
+
+        osg::Geode* geode = new osg::Geode;
+        geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0f,0.0f,0.0f),10.0f)));
+        positionEffects->addChild(geode);
+
+        positionEffects->addChild(explosion);
+        positionEffects->addChild(smoke);
+        positionEffects->addChild(fire);
+
+        osgParticle::ParticleSystemUpdater *psu = new osgParticle::ParticleSystemUpdater;
+
+        psu->addParticleSystem(explosion->getParticleSystem());
+        psu->addParticleSystem(smoke->getParticleSystem());
+        psu->addParticleSystem(fire->getParticleSystem());
+
+        // add the updater node to the scene graph
+        root->addChild(psu);
+    }
+    
+    
+    // create the moving models.
+    {
+        root->addChild(createMovingModel(osg::Vec3(500.0f,500.0f,500.0f),100.0f));
+    }
+}
+
+
+//////////////////////////////////////////////////////////////////////////////
+// main()
+//////////////////////////////////////////////////////////////////////////////
+
+
+int main(int argc, char **argv)
 {
     // use an ArgumentParser object to manage the program arguments.
     osg::ArgumentParser arguments(&argc,argv);
-
+    
     // set up the usage document, in case we need to print out how to use this program.
-    arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates both text, animation and billboard via custom transform to create the OpenSceneGraph logo..");
-    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
+    arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use of particle systems.");
+    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] image_file_left_eye image_file_right_eye");
     arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
-    arguments.getApplicationUsage()->addCommandLineOption("ps","Render the Professional Services logo");
+    
 
     // construct the viewer.
@@ -128 +288 @@
         return 1;
     }
-
-    osg::Node* node = createSphereSegment();
-
-    // add model to viewer.
-    viewer.setSceneData( node );
-
+    
+    osg::Group *root = new osg::Group;
+    build_world(root);
+   
+    // add a viewport to the viewer and attach the scene graph.
+    viewer.setSceneData(root);
+        
     // create the windows and run the threads.
     viewer.realize();
@@ -145 +306 @@
         // call all node update callbacks and animations.
         viewer.update();
-
+         
         // fire off the cull and draw traversals of the scene.
         viewer.frame();
-    }
-
+        
+    }
+    
     // wait for all cull and draw threads to complete before exit.
     viewer.sync();