Hi,
I have been using OSG for a while now, but now I am trying to implement shadows
using the ShadowMap. This generally works, but for some reason all the .osg
models that I import through readNodeFile are now missing their textures. When
I switch back from the ShadowedScene to a regular Group, the textures work
again.
In order to make it easier to help me, I have reduced my problem to a very
basic setup, which is just a flat plate with a texture and a sphere hovering
over it. I have attached the .osg file for the plate as well as a main.cpp for
the program. It should run immediately.
Basically the code in my main function is as follows:
Code:
//Main light source
Vec3 light_position(0, 0, 5);
ref_ptr<LightSource> light_source (new osg::LightSource);
light_source->getLight()->setPosition(Vec4(light_position, 1));
light_source->getLight()->setAmbient(Vec4(0.5, 0.5, 0.5, 1));
light_source->getLight()->setDiffuse(Vec4(0.8, 0.8, 0.8, 1));
light_source->getLight()->setSpecular(Vec4(0.5, 0.5, 0.5, 1.0));
light_source->getLight()->setConstantAttenuation(0.5);
//Set shadow mask ints
int receive_shadow_mask = 0x1;
int cast_shadow_mask = 0x2;
//Setup root scene
ref_ptr<ShadowedScene> root = new ShadowedScene();
ref_ptr<ShadowMap> shadow_map (new osgShadow::ShadowMap);
shadow_map->setLight(light_source);
shadow_map->setTextureSize(osg::Vec2s(1024, 1024));
shadow_map->setTextureUnit(1);
root->setReceivesShadowTraversalMask(receive_shadow_mask);
root->setCastsShadowTraversalMask(cast_shadow_mask);
root->setShadowTechnique(shadow_map);
//ref_ptr<Group> root = new Group();
//Load the model
osg::ref_ptr<osg::Node> model = osgDB::readNodeFile("media/plate.osg");
//Make a sphere
ref_ptr<osg::Geode> sphere = new osg::Geode();
osg::ShapeDrawable * drawable = new ShapeDrawable(new Sphere(Vec3(0.0,
0.0, 1.2), 0.1));
sphere->addDrawable(drawable);
//Cast shadows
model->setNodeMask(cast_shadow_mask|receive_shadow_mask);
sphere->setNodeMask(cast_shadow_mask|receive_shadow_mask);
//Add stuff to root
root->addChild(light_source);
root->addChild(model);
root->addChild(sphere);
//Setup viewer
osgViewer::Viewer viewer;
viewer.setCameraManipulator(new osgGA::TrackballManipulator);
viewer.setSceneData(root);
viewer.realize();
while (!viewer.done()) {
viewer.frame();
Sleep(5);
}
return 0;
This will not show any textures on my plate. The shadow does work, however.
When I comment the whole ShadowedScene part and I uncomment the line
//ref_ptr<Group> root = new Group(); the textures work once again, but
obviously no shadows.
I have looked through the forums and there were some people with the same
problem as me. Apparently the problem should lie in the fact that my .osg
texture used the same unit as the shadow texture. This was indeed the case, as
they both used 1. However, after changing this in my .osg model to 2, the
result was the same, no texture on my plate, even though it seemed to solve the
problem for many other users on this forum.
Attached is also the .osg file in which you can see that I have changed the
texture unit to 2.
Does anyone have any other ideas on what needs to change in my program in order
to get both the model textures to work, together with shadows?
Thanks,
Cyclonis[/code]
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=55003#55003
Attachments:
http://forum.openscenegraph.org//files/main_724.cpp
http://forum.openscenegraph.org//files/plate_822.osg
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