Hi, Zachary
first thing: your texture clamping setup is wrong
you should use WRAP_T instead of WRAP_R in first line
second: overlapping means that your texture coords generation provides
incorrect output, cant say much more as i have no idea what your model are
Cheers, Sergey.
16.03.2012, 00:59, "Zachary Hilbun" <osgfo...@tevs.eu>:
> Hi,
>
> I am texturing a disk (circle) I created with a square texture. The texture
> has a transparent background so any parts of it that don't overlap the disk
> and hang over the sides are transparent.
>
> The code that does this is below. The Geode circleGeodeImage has been
> previously created and added to the scene, but does not have a texture on it
> until the code below does that.
>
> When this is displayed, the image is on the disk as it should be, but it is
> repeated multiple times in the -Z (down the screen) direction. The repeated
> image overlaps itself so that the 2nd image starts about 25% from the top of
> the disk and overlaps the 75% of the disk below that, and the 3rd image
> starts about 50% from the top, etc.. So the top 25% is OK, the the
> overlapping is happening below that.
>
> I looked at the texture and verticies that are being used and they look
> correct to me.
>
> I tried clamping it to see what happened, but it made no differnce.
>
> osg::ref_ptr<osg::Image> image = osgDB::readImageFile
> ("jet_fighter3-nobackground.png");
> if ( ! image)
> {
> QMessageBox::critical (NULL, QObject::tr ("Image file is missing"),
> QObject::tr ("jet_fighter3-nobackgroundof.png"));
> return 1;
> }
>
> osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D (image.get ());
>
> osg::ref_ptr<osg::Vec2Array> texcoords = new osg::Vec2Array;
>
> osg::Drawable *pDrawable = circleGeodeImage->getDrawable (0);
> osg::Geometry *geom = pDrawable->asGeometry ();
> osg::Vec3 *pVertex = (osg::Vec3 *) geom->getVertexArray ();
>
> int vertCount = 0;
>
> for (osg::Vec3Array::iterator iVertex = pVertexs->begin (); iVertex !=
> pVertexs->end (); ++iVertex)
> {
> float xVertex = iVertex->x ();
> float zVertex = iVertex->z ();
> float x = (xVertex + 1.) / 2.;
> float y = (zVertex + 1.) / 2.;
>
> std::cout << "Map vertex " << xVertex << ", " << zVertex << " to
> texture " << x << ", " << y << std::endl;
> texcoords->push_back (osg::Vec2 (x, y));
> vertCount++;
> }
>
> geom->setTexCoordArray (0, texcoords.get ());
> texture->setWrap (osg::Texture::WRAP_R, osg::Texture::CLAMP);
> texture->setWrap (osg::Texture::WRAP_S, osg::Texture::CLAMP);
>
> translateNodeDiskRotate->getOrCreateStateSet ()->setTextureAttributeAndModes
> (0, texture.get (), osg::StateAttribute::ON);
>
> Thank you!
>
> Cheers,
> Zachary
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=46319#46319
>
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