Shrimp Shader Generator FLTK2 GUI (SVN)

-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)

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

Tweaked wrapped diffuse block, added attenuation.

Added diffuse falloff block. Tweaked lafortune block, changed some defaults. Tweaked the shading model headers, added the new diffuse falloff function, and factored in nondiff and nonspec for the outputs, since besides an on/off switch, they can be a scaling factor for light intensity.

NEW: console output example

Added Luke Emrose's implementation of Neulander & Van de Panne occlusion. (Note: need primitive variables, implement primitive variable blocks later & tweak AOVs).

ENH: split shader blocks inthe rendered scene, $(shaders) now comes with the surface_shaders, displacement_shaders, volume_shaders and light_shaders variables

drag no more do a selection only highlight the block, for selection LMB.