FGFS-4.1/OpenSceneGraph
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Added support for point sprites

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This commit is contained in:
Robert Osfield
2005-07-01 09:10:37 +00:00
parent 64cfa2773d
commit 68cb69ee82
1 changed files with 29 additions and 3 deletions
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32
examples/osgpoints/osgpoints.cpp
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@@ -14,6 +14,9 @@
#include <osgProducer/Viewer>
#include <osg/Point>
#include <osg/BlendFunc>
#include <osg/Texture2D>
#include <osg/PointSprite>
class KeyboardEventHandler : public osgGA::GUIEventHandler
{
@@ -23,7 +26,6 @@ public:
_stateset(stateset)
{
_point = new osg::Point;
_point->setDistanceAttenuation(osg::Vec3(0.0,0.0005,0.0f));
_point->setDistanceAttenuation(osg::Vec3(0.0,0.0000,0.05f));
_stateset->setAttribute(_point.get());
}
@@ -44,12 +46,12 @@ public:
changePointSize(-1.0f);
return true;
}
else if (ea.getKey()=='*')
else if (ea.getKey()=='<')
{
changePointAttenuation(1.1f);
return true;
}
else if (ea.getKey()=='/')
else if (ea.getKey()=='>')
{
changePointAttenuation(1.0f/1.1f);
return true;
@@ -108,6 +110,7 @@ int main( int argc, char **argv )
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the standard OpenSceneGraph example which loads and visualises 3d models.");
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
arguments.getApplicationUsage()->addCommandLineOption("--sprites","Point sprites.");
// construct the viewer.
@@ -125,6 +128,9 @@ int main( int argc, char **argv )
arguments.getApplicationUsage()->write(std::cout);
return 1;
}
bool usePointSprites = false;
while (arguments.read("--sprites")) { usePointSprites = true; };
// any option left unread are converted into errors to write out later.
arguments.reportRemainingOptionsAsUnrecognized();
@@ -166,6 +172,26 @@ int main( int argc, char **argv )
// set the scene to render
viewer.setSceneData(loadedModel.get());
if (usePointSprites)
{
osg::StateSet* stateset = loadedModel->getOrCreateStateSet();
/// Setup cool blending
osg::BlendFunc *fn = new osg::BlendFunc();
stateset->setAttributeAndModes(fn, osg::StateAttribute::ON);
/// Setup the point sprites
osg::PointSprite *sprite = new osg::PointSprite();
stateset->setTextureAttributeAndModes(0, sprite, osg::StateAttribute::ON);
/// The texture for the sprites
osg::Texture2D *tex = new osg::Texture2D();
tex->setImage(osgDB::readImageFile("Images/particle.rgb"));
stateset->setTextureAttributeAndModes(0, tex, osg::StateAttribute::ON);
}
// register the handler for modifying the point size
viewer.getEventHandlerList().push_front(new KeyboardEventHandler(viewer.getGlobalStateSet()));