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Improved the handling of building/writing generated databases, and

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the fixed transition distances on the lower levels of geocentric databases.
This commit is contained in:
Robert Osfield
2004-09-13 13:53:45 +00:00
parent 8536e5dbdf
commit b664c20c74
4 changed files with 148 additions and 248 deletions
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290
examples/osgsimulation/osgsimulation.cpp
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@@ -6,251 +6,81 @@
#include <osg/Texture2D>
#include <osg/PositionAttitudeTransform>
#include <osg/MatrixTransform>
#include <osg/CoordinateSystemNode>
#include <osgDB/FileUtils>
#include <osgDB/ReadFile>
#include <osgText/Text>
#include <osgSim/SphereSegment>
#include <osgParticle/ExplosionEffect>
#include <osgParticle/SmokeEffect>
#include <osgParticle/FireEffect>
#include <osgParticle/ParticleSystemUpdater>
#include <osgTerrain/DataSet>
#include <osgGA/NodeTrackerManipulator>
// 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)
{
glider->setName("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)
{
cessna->setName("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())
class GraphicsContext {
public:
GraphicsContext()
{
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);
rs = new Producer::RenderSurface;
rs->setWindowRectangle(0,0,1,1);
rs->useBorder(false);
rs->useConfigEventThread(false);
rs->realize();
std::cout<<"Realized window"<<std::endl;
}
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)
virtual ~GraphicsContext()
{
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);
}
private:
Producer::ref_ptr<Producer::RenderSurface> rs;
};
// 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);
}
osg::Node* createEarth()
{
osg::ref_ptr<osg::Node> scene;
// create the moving models.
{
root->addChild(createMovingModel(osg::Vec3(500.0f,500.0f,500.0f),100.0f));
std::string filename = osgDB::findDataFile("Images/land_shallow_topo_2048.jpg");
osg::ref_ptr<osgTerrain::DataSet> dataSet = new osgTerrain::DataSet;
// register the source imagery
{
osgTerrain::DataSet::Source* source = new osgTerrain::DataSet::Source(osgTerrain::DataSet::Source::IMAGE, filename);
source->setCoordinateSystemPolicy(osgTerrain::DataSet::Source::PREFER_CONFIG_SETTINGS);
source->setCoordinateSystem(osgTerrain::DataSet::coordinateSystemStringToWTK("WGS84"));
source->setGeoTransformPolicy(osgTerrain::DataSet::Source::PREFER_CONFIG_SETTINGS_BUT_SCALE_BY_FILE_RESOLUTION);
source->setGeoTransformFromRange(-180.0, 180.0, -90.0, 90.0);
dataSet->addSource(source);
}
// set up destination database paramters.
dataSet->setDatabaseType(osgTerrain::DataSet::LOD_DATABASE);
dataSet->setConvertFromGeographicToGeocentric(true);
dataSet->setDestinationName("test.osg");
// load the source data and record sizes.
dataSet->loadSources();
GraphicsContext context;
dataSet->createDestination(30);
if (dataSet->getDatabaseType()==osgTerrain::DataSet::LOD_DATABASE) dataSet->buildDestination();
else dataSet->writeDestination();
scene = dataSet->getDestinationRootNode();
}
return scene.release();
}
class FindNamedNodeVisitor : public osg::NodeVisitor
{
public:
@@ -275,11 +105,6 @@ public:
//////////////////////////////////////////////////////////////////////////////
// main()
//////////////////////////////////////////////////////////////////////////////
int main(int argc, char **argv)
{
// use an ArgumentParser object to manage the program arguments.
@@ -319,8 +144,9 @@ int main(int argc, char **argv)
return 1;
}
osg::Group *root = new osg::Group;
build_world(root);
osg::Node *root = createEarth();
if (!root) return 0;
// add a viewport to the viewer and attach the scene graph.
viewer.setSceneData(root);