[Visualpython-users] first patch towards transparency

[dman <ds...@ri...>]

Attached is a patch that is a first step towards transparency.  It
adds an alpha channel to 'rgb' objects that defaults to 1.0 if it
isn't specified.  It also turns on alpha blending for spheres.  I
haven't started to touch the ordering issue yet.  I can put two
spheres slightly overlapping and see one inside the other (the one
created is inside).


I have a question regarding style, sub-object construction and the
'rgb' class.  There are two constructors there :

~~~~~~~~~~~~~~~~~~
rgb::rgb() {
  r = g = b = 1.0;
  a = ALPHA_DEFAULT ;
}

rgb::rgb(float _r, float _g, float _b, float _a)
 : r(_r), g(_g), b(_b), a(_a)
{
}
~~~~~~~~~~~~~~~~~~


Why is sub-object construction used for one and not the other?  I
think that one style should be chosed and used consistently.  In this
case, just ints, it doesn't matter which one.

-D

-- 

A wise servant will rule over a disgraceful son,
and will share the inheritance as one of the brothers.
        Proverbs 17:2