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Re: Raycasting 3D demo disk

Subject: Re: Raycasting 3D demo disk
From: aiiadict@gmail.com
Date: 18 Jan 2007 08:46:34 -0800
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Jerry wrote:
> for that, why not just compute PIX= C * 17 ?

there are 3 routines in the assembly,

1)AND with  #$0F  (to strip high nibble, leave low nibble)
2)AND with #$F0 (to strip low nibble, leave high nibble)
3)match high nibble to low nibble (lda 8000, ROLX4, ORA 8000)

could all be done with applesoft..  but I'm going to be converting
the map display and texture display code to assembly today,
so I figured I might as well start thinking 6502

Rich

Follow-Ups:
- Re: Raycasting 3D demo disk
  - From: Jerry <SNIPawanderin@yahoSNIPo.ca>

References:
- Raycasting 3D demo disk
  - From: David Schmenk <dschmenk@YUCH.gmail.com>
- Re: Raycasting 3D demo disk
  - From: heuser.marcus@freenet.de
- Re: Raycasting 3D demo disk
  - From: aiiadict@gmail.com
- Re: Raycasting 3D demo disk
  - From: Jerry <SNIPawanderin@yahoSNIPo.ca>

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