From: Lorenzo <email@hidden>
Subject: Re: Transparent objects
To: Chaz McGarvey <email@hidden>
Cc: Mac List <email@hidden>
Thank you Chaz,
the problem is that it's an animation. So the objects could be once on
the
back and once on the front. They not only change order but also
rotate, so
how can I know whether an object is in front or on the back? Think
about an
half-trasparent-cube with 6 faces, plus an opaque cylinder crossing
through
the cube from outside to inside.
If I disable the depth test of the cube and I draw firstly the cube
then the
cylinder, I see the internal part of the cylinder drawn outside the
cube
(instead that part is "inside" the cube!).
And If I disable the depth test of the cube and I draw firstly the
cylinder
then the cube, I see the external part of the cylinder drawn inside
the cube
(instead that part is "outise" the cube!).
So, I really think that this is not the way to proceed. I presume I can
solve this with some accumulation z buffer, collecting any object
depth then
drawing all the objects at the end. But I don't know whether this
method
exists or not.
Is anyone here who knows how to solve this "transparent" problem?
Please.
There should be a solution, for sure!
Best Regards
--
Lorenzo
email: email@hidden
