Gerrick, If you can tolerate a few more questions...
Your UpdateTextureCallback class derives from osg::Texture*D::SubloadCallback, is that correct? What does your call to setSubloadCallback() look like? Thanks. Ken. Right. I'm not sure when the subload callback is actually triggered but you need a valid context so my first guess would be during the cull traversal (anyone can correct me on this as I am just guessing). We derive our own subloadCallback class that has a pointer to the texture data (that's the _tm->dataField reference below). Not sure how others are doing it. To subload we have algorithms that trigger updating the pointer to the texture data. biv On 10/19/07, Sewell, Kenneth R Civ USAF AFRL/RYZW < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: Thanks for the response. If you don't mind could you answer a couple more questions? What triggers the callbacks? How/where is the new data to be subloaded associated with the callback function? Thanks. Hi Ken, Basically you just need to setup a TextureSubloadCallback for your specific type of texture(1D,2D,3D). This allows you to override the load and subload methods that you would encounter in gl. Then set the subloadcallback to your texture using: Texture*D::setSubloadCallback(SubloadCallback* sb); Overrides are something like the following: load: //////////////////////////////////////////////////////////////////////// //////////// void UpdateTextureCallback::load(const osg::Texture3D& texture,osg::State& state )const { texture.getExtensions(state.getContextID(),false)->glTexImage3D(GL_TEXTU RE_3D, 0, GL_RGBA, _textureWidth, _textureHeight, _textureDepth, 0, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char*)_tm->dataField); } and subload : //////////////////////////////////////////////////////////////////////// ////////////////////// void UpdateTextureCallback::subload(const osg::Texture3D& texture,osg::State& state) const { texture.getExtensions(state.getContextID(),false)->glTexSubImage3D(GL_TE XTURE_3D, 0, 0,0,0, _textureWidth, _textureHeight, _textureDepth, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char*)_tm->dataField); } You'll have to adjust this for your texture type (this is ours for 3D textures) but this should give you a general idea. biv On 10/19/07, Sewell, Kenneth R Civ USAF AFRL/RYZW <[EMAIL PROTECTED]> wrote: Is there a good example of texture subloading in OSG? I have a large image and just want to replace small tiles of the texture. Can anyone give me a few starting pointers? Ken. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g
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