Re: Fwd: [Fieldtrip] Lighting Patch for Fieldtrip

Hi David, David Sankel wrote:

On Tue, Jan 6, 2009 at 10:43 PM, Conal Elliott wrote:

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Also, I'd also like to see some response to Ivan's last message on the thread "Adding lighting to FieldTrip". I appreciate Ivan's focus on GPU execution, which I hope will soon replace CPU execution in the implementation of FieldTrip. I expect we'll get a quite dramatic boost in performance as well as having more flexibility.

The FieldTrip.Light structure, from a semantic point of view, gives access to a lot of common light models and is independent of the underlying OpenGL operations.

If the back-end code is completely replaced with GLSL, it will just be a matter of setting "uniform variables" instead of glLight calls in renderLightIO and possibly expanding the Light structure with more funky light forms.

Yes the code behind it could be changed to use shaders and all that would do is emulate legacy OpenGL. These concepts are tied to legacy OpenGL. The lighting models are just simple functions and with shaders they are best represented as such. Ivan