Personal IRIS benchmarks

[Thant Tessman]

In article <26596 at sgi.SGI.COM>, gavin at krypton.SGI.COM (Gavin Bell) writes:
> We quote 5,900 Z-buffered, Gouraud shaded, 4 sided 100x100 independent
> polygons per second on the Personal Iris.  The 100,000 polygons/second
> figure you heard is for the GTX products.
> 
> Will you get 5,900 polygons per second in your application?  Not if:
> 1) You spend any time computing the polygons, or spend any time
> 	re-organizing the vertex data to match the v() commands.
> 2) You spend any time clearing your window or z-buffer (remember, it
> 	takes ~10 microseconds to clear the screen, so at 30 frames/second
> 	~20 percent of your time is spent just clearing the	framebuffer).
> 3) You have big polygons (bigger than 10 by 10 pixels).
> 4) You use the old drawing commands.
> 5) You draw few polygons in double-buffered mode.  Worst case is
> 	drawing one polygon, then swapping buffers-- the swapbuffers()
> 	command has to wait for the vertical retrace of the monitor you
> 	are using, so you will get only ~60 polygons/second.
> 
[stuff deleted]
> --gavin (gavin at sgi.com)
> 

However...

The polygons are z-buffered, gouraud-shaded, independent, randomly oriented
quadrilaterals.

Not a screen-aligned t-mesh.

thant (thant at sgi.com)