Shrimp Shader Generator FLTK2 GUI (SVN)

Small update to glass function, maximum continuation is float.

Only 3delight seems to product correct internal reflections without the need to reverse N if the ray is travelling inside medium, other renderers need reversed N, otherwise fresnel() will go the way of the wouwous.

Added bias for glass's environment().

Typo in vmax/vmin, return type should float, not color.

Updated glass shading function. Still needs transmission for shadow colors, and eventually dispersion. Added luminance block.

Added stippled lines for active connections (pad>pointer).

Fixed the tooltip color/background readability problem, tweaked some widget's colors. Added rounded corners blocks.

Added a new default (dark) theme, flat/border-boxxed.

Changed the UI a bit, added widgets for normal, point, matrix types. Tweaked existing string and color type widgets. Changed colors for blocks, and shape and colors for groups.

No more warnings on vex_include and vex_code parsing in shading blocks