Hello all, My first post on the new forum, thanks for accepting my request, and for the amazing work on OSG over the years.
I intend to use OSG to display the construction sequence of a building site. Some elements will just appear at a given frame (that's easy), but others I'd like to appear progressively. I don't mean that they will "move" to their destination, but rather, that they will be partially visible in their final position as if being partially clipped, until they are entirely visible: [image: Clipping.svg.png] Since timing will be different for each object, a few clipping planes would not be enough. >From what I read, it should be possible to use the fragment shader to cut elements fairly arbitrarily. I've got a couple of questions: 1) Is it possible to use fragment shaders to cut objects at a custom distance from a shared reference plane (the distance should be independent for each object, see hA and hB in the image above)? 2) What path would you suggest me to attempt? Is gl_ClipDistance the right way to go? Am I completely wrong thinking of something like: gl_ClipDistance[0] = dot(u_plane0,vsPos) + *CustomObjectH*; 3) Is the StateSet of an object the right way to pass (and update) a custom variable for the fragment shader (i.e. the distance from the reference plane)? Many thanks, Claudio -- You received this message because you are subscribed to the Google Groups "OpenSceneGraph Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/osg-users/9173059e-957c-471c-a71b-f0dd52a1afb0n%40googlegroups.com.
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