Hi, I'm implementing shaders in GLSL 140+ (i.e. no built-in uniforms), and I've had reasonably good success thus far. However, it's quite obvious that passing the vertices in using osg_Vertex doesn't include any transformations which may have been inherited (or directly applied).
This exact question was asked a few months ago here: http://forum.openscenegraph.org/viewtopic.php?t=8350&highlight=vertex+transform+shader In the last post, the user indicates they solved the problem as follows: > "Basically what I've had to do is manually append the view matrix onto each > light's model transformation each frame and that gives the expected > transformation." I'm not sure what he meant, esp. since it made the difference from seeing nothing to seeing anything at all for him. In my case, I have basic lighting running perfectly in GLSL 140+ (using uniforms / attributes instead of built-in's), but if I were to transform the model, the transformation never shows up in the vertex shader. It seems apparent that I need to multiply the osg_Vertex vector in my vertex shader with the model matrix for that geometry (via a uniform updated every frame, or at least whenever the geometry is transformed). The only function that I've found that may get the model matrix is getModelMatrix() in the IntersectionVisitor class. Any thoughts? Joel ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=43125#43125 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
