NURBS

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Marco Crocetta (onyx++at++datamat.it)
Mon, 29 May 95 14:22:54 METDST

Hi people!,

In my application I'm rendering a NURBS surface to simulate
the sea surface motion.
The NURBS is rendered in the pre-draw callback using the GL calls
nurbssurface(....).
The waves motion is implemented just changing the control point
coordinates (stored in the Shared arena) frame by frame by the APP process.
Everthing works quite fine the only thing is that
NURBS seems to be quite heavy because they
badly increase the drawing time.

Now I have a doubt that I can explain with the following question:

QUESTION: are NURBS so heavy? Or something went wrong because
the control points are not ring-buffered??.
In other words: if the draw process uses some data arrays that are
modified frame by frame by the APP process do I REALLY need
to ring buffer this data, which problems may arise not buffering
data between the DRAW and APP processes?

Thanks in Advance

---------------------------
Marco Crocetta
DATAMAT SpA, Rome
e-mail: onyx++at++datamat.it
---------------------------

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