Simon Bennett (simonb++at++wormald.com.au)
Thu, 9 Mar 1995 16:47:38 +1000 (EST)
> If this is so, does Performer send these complete transparent lightpoints to
> the geometry pipeline or not? For example, say I've got 1000 lightpoints and
> that depending on a number of criteria I'd like to display some of them as 1
> pixel and some of them as 3 pixels. If I setup 2 lightpoint nodes each with
> a 1000 point capability, but one with a pfLPointSize of 1.0 and the other
> with a pfLPointSize of 3.0 - to "move" points between the two nodes, the
> alpha values are changed from 1.0 (exists) to 0.0 (doesn't exist). If I
> always render the whole 1000 points in the scene and evenly balance the
> points between the two nodes (i.e. the same point position never appears
> in both nodes) how many points are sent to the pipeline? 1000 or 2000?
2000 - Performer doesn't do anything clever with lightpoint nodes. The
only way that I can see to do what you want is to create/destroy new
lightpoint nodes on the fly.
+--------------------------------------------------------------------------------+
Simon Bennett simonb++at++wormald.com.au
Wormald Technology Advanced Systems Engineering Ph: +61 2 981 0611 (x512)
Computer Terms: hardware - the part of a computer system that one can kick
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