Shrimp Shader Generator FLTK2 GUI (SVN)

Forgot to add __inshadow to light blocks.

Small tweak, renamed shadow variable __shadow, will add __unshadowed later.

Added simple AOV example. Added support for light categories as part of shrimp generated output vars, together with __nondiffuse, __nonspecular, __inShadowC. Added support for light categories in the shading functions blocks. All illuminance() statements now have a respective category variable. Updated the examples to use light categories. Updated all light blocks so that the user can set the light category. The grid shader now outputs correctly to aov_surface and aov_diffuse AOVs, and the default distant light shader now has __nondiffuse and __nonspecular.

Added getshadows() macro to the end of the surface shader generation, to pass shadows to its AOV.

Fixed typo in environment() block. Added getshadows macro to AOV headers. Added __inShadowC varying output color to light shader parameters in rib_root_block. Added user-set decay to the light functions, tweaked the light blocks to store __inShadowC, and use decay and some minor tweaks.

-Update toggle selection on marquee when the box is not surrounding a previous area

Tweaked the brushed vector function and blocks, added a twist/rotation factor.

-Move marquee selection(draw box selection and drag selection by selected any selected block )

Added helper function to get a brushed anisotropy vector for brushed metal effects.

-UI of the marquee selection (Move Copy Paste Delete will come soon)