From: Christopher Phillips (shrydar_at_jaruth.com)
Date: 2004-11-03 12:57:21
On 1 Nov 2004, at 08:43, Steve Judd wrote:
> Hey Hatch,
>
> Want to know one of the more time-consuming operations in 3D graphics?
> Clearing the screen. No matter how fast of a plotting algorithm I
> have,
> it still takes at least 8*40*25*4=32000 cycles to clear a full screen
> --
> about two frames. If you had a way to instantly clear out a section of
> memory...
Do you still do fullscreen clears rather than writing to the screen
with an eor-plotter?
Or are you referring to the cost of clearing the eorbuffer?
>
> As to organization, vertical organization is preferred for any
> plotting.
> That's why people use charmaps. That is, if you can simply ldy ycoord
> then algorithms become simpler.
True for BOBs etc, but I would have thought less applicable to 3d?
>
> You can add bitplanes if you want, but they'll be useful mostly for
> static
> graphics (or very small graphic areas). Forget chunky modes. The
> reason
> is that you just can't push much data around at 1MHz.
*concur*
>
> The biggest problem you'll run into? Finding someone to program the
> thing! But it sounds like a fun hardware project!
I might be interested...
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