Robert Webb (robertw++at++wormald.COM.AU)
Wed, 28 Feb 1996 16:59:33 +1100 (EST)
> I am doing texture coordinate translation in the DRAW process by obtaining
> the current coordinates, updating them as needed and setting it back again
> on to its geoset. I want to know if there is a way to do this from the APP
> process too. I have tried following the same procedure in the APP process,
> but the new coordinates do not take effect. I thought it would be possible
> because initially all geometry is created and assigned texture coordinates
> from the APP process. So why can't I change it later on from within the same
> process?
Ah, your array of texture coordinates must be allocated from the shared
arena with pfMalloc() before pfConfig(). After the processes are forked off
with pfConfig(), they then each have their own copy of all variables, so
arrays that are not in shared memory will be copied. So in your APP you are
not changing the same array as the DRAW is using. You must also be sure you
allocate the array before pfConfig() because if it is done after, only the
APPs local copy of the pointer to the array will be set top point at the
right place.
Was this the problem?
Rob.
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