Hi Brent,
What happens if I attach a program shader to a group node and then a different
program shader to the child node? Are both shaders executed? Just one? What
order? Precedence, etc?
The same rule as for any other state applies here: a state attribute on
a child is inherited from the parent, unless the child specifies its own
attribute.
However, shaders are not executed while traversing the graph, they are
only executed when something is drawn. Only one state attribute can be
active on a given state set at a time, so no, shaders cannot be combined
like that. So the question is which program is active on a given
drawable, and that is determined by the path down to the drawable and
which program was last encountered on that path.
Say you have
root <-- programA
/ \
/ \
no program --> Node1 Node2 <-- programB
Well, if Node1 has any drawables under it, programA will be active when
those drawables are drawn, and if Node2 has any drawables under it,
programB will be active for them.
Hope that helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay jean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.dyndns-web.com/
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