OT, but since you're getting into using GLSL in QC: One interesting/obscure tip for the GLSL patch is that if you make a uniform vec4 called "Color" or "insert-word-here_Color" it will create a color port interface.
Best regards, George Toledo On Thu, Aug 30, 2012 at 12:24 PM, Christopher Wright < [email protected]> wrote: > How do you specify the surface that you want to render on for the shader? > I can take the code from a working shader (e.g. GLSL - TorusMorph) and put > it in a new composition and it doesn't show anything. I also noticed that > GLSL - Lattice is rendered on the teapot, but I did not see any reference > to the teapot in the composition. I am sure I am missing something > obvious, but I have explored the menus and can't figure out how to specify > what surface to render the shader on. > > > the GLSL Shader patch is a macro - it has patches "inside" that it > operates on. So in the teapot case, for example, there's a teapot "inside" > the GLSL shader patch (you'll have to click the patch and press cmd-down to > enter it; cmd-up will exit a macro). Double-clicking the macro will also > take you inside it. > > BTW, I am just learning shaders and OpenGL and was hoping that Quartz > Composer would be a good way to do this. > > My goal is to experiment with imaging algorithms using GLSL so I just need > a rectangular surface to render onto. > > > In this case, you'll probably just want to toss a sprite or GLSL Grid into > the shader macro - I personally find a track ball macro containing the > shader to also be useful (so I can rotate the rectangular surface while > experimenting). > > -- > Christopher Wright > [email protected] > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > > https://lists.apple.com/mailman/options/quartzcomposer-dev/gtoledo3%40gmail.com > > This email sent to [email protected] > >
_______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com This email sent to [email protected]
