With Mario's work on a new renderer we're on our way to having 3D model previews. I have a screenshot of the model selection dialog with a preview of a dummy model:
https://drive.google.com/file/d/0By_XTJN-s8aXZzFCbGdUMGlzXzA/view?usp=sharing There's still a *lot* of work to do before we can see actual VRML and X3D models; I need to convert from the cache intermediate data model to the data model used for actual OpenGL display and then Mario and I would have to create VRML/X3D plugins to replace the current VRML/X3D parsers. The first model which would actually be visible in the preview would be IDF models since my next task is to make an IDF plugin as a simple example of how to write a functional plugin. In the course of improving the 3D system Mario is more or less completely rewriting 3d-viewer; neither of us could see a way of improving the system in stages. However, the 3D cache code can be decoupled from the renderer so that we can introduce a few changes earlier on. The 3D cache wouldn't be able to render previews in this instance but it would provide a significant improvement to the 3D model file browsing. The rest of the 3D work (rendering + functional plugins) will have to be introduced when that code has matured enough to replace 3D viewer and it's going to be one monster patch. - Cirilo
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