[osg-users] osg::Light Simple Question ?
Peter Wraae Marino
osghelp at gmail.com
Fri Jul 18 23:31:58 PDT 2008
Hi,
isnt there missing a
*setMode*( GL_LIGHT1, osg::StateAttribute::ON );
for your terrain group? (or did I miss something?)
Peter
http://osghelp.com
On Sat, Jul 19, 2008 at 12:39 AM, Ümit Uzun <umituzun84 at gmail.com> wrote:
> Hi All,
>
> I have an simple question about light the terrain model problem. I have
> added two sphere(osg::Sphere) and one terrain(JoeDirt.flt) to the scene. I
> am trying to effect the components of scene with green light. Although green
> light could effected two of sphere, couldn't get success on the terrain
> model. What can I do to effect the terrain with green light? I have tried
> this code block;
>
>
> --------------------------------------------------------------------------------------------------------------------------------------------------
> *int main()
> {
> osgViewer::Viewer viewer;
> osg::ref_ptr<osg::Group> root (new osg::Group);
>
> osg::ref_ptr<osg::MatrixTransform> terrainScaleMAT (new
> osg::MatrixTransform);
> osg::Matrix terrainScaleMatrix;
> terrainScaleMatrix.makeScale(0.05f,0.05f,0.03f);
>
> //Lighting code
> osg::ref_ptr<osg::Group> lightGroup (new osg::Group);
> osg::ref_ptr<osg::StateSet> lightSS (root->getOrCreateStateSet());
> osg::ref_ptr<osg::LightSource> lightSource1 = new osg::LightSource;
>
> // create a local light.
> osg::Vec4f lightPosition (osg::Vec4f(0.0,0.0,3.0,1.0f));
> osg::ref_ptr<osg::Light> myLight = new osg::Light;
> myLight->setLightNum(1);
> myLight->setPosition(lightPosition);
> myLight->setAmbient(osg::Vec4(0.2f,0.2f,0.2f,1.0f));
> myLight->setDiffuse(osg::Vec4(0.1f,0.4f,0.1f,1.0f));
> myLight->setConstantAttenuation(1.0f);
> lightSource1->setLight(myLight.get());
>
> lightSource1->setLocalStateSetModes(osg::StateAttribute::ON);
> lightSource1->setStateSetModes(*lightSS,osg::StateAttribute::ON);
>
> lightGroup->addChild(lightSource1.get());
>
> //Light markers: small spheres
> osg::ref_ptr<osg::Geode> lightMarkerGeode (new osg::Geode);
> lightMarkerGeode->addDrawable(new osg::ShapeDrawable(new
> osg::Sphere(osg::Vec3f(-5.0f,-2.0f,3.0f),0.5f)));
>
>
> //lightMarkerGeode->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
>
> //Second light marker
> lightMarkerGeode->addDrawable(new osg::ShapeDrawable(new
> osg::Sphere(osg::Vec3f(2.0f,-1.0f,3.0f),0.5f)));
>
> //Loading the terrain node
> osg::ref_ptr<osg::Node> terrainnode
> (osgDB::readNodeFile("JoeDirt.flt"));
> terrainScaleMAT->addChild(terrainnode.get());
> terrainScaleMAT->setMatrix(terrainScaleMatrix);
>
> //adding the terrain node to the root node
> root->addChild(terrainScaleMAT.get());
>
> //lighting code
> root->addChild(lightGroup.get());
> //Adding the light marker geode
> root->addChild(lightMarkerGeode.get());
>
> // add the state manipulator
> viewer.addEventHandler( new
> osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
>
> viewer.setSceneData( root.get() );
>
> return (viewer.run());
> }*
>
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
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>
>
--
Regards,
Peter Wraae Marino
www.osghelp.com - OpenSceneGraph support site
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