Re: A89: White/Invert Line

To: assembly-89@lists.ticalc.org
Subject: Re: A89: White/Invert Line
From: Nick Blizard <nblizard@bellsouth.net>
Date: Sat, 19 Dec 1998 01:03:02 -0500
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
References: <f231ec38.367aedc6@aol.com>
Reply-To: assembly-89@lists.ticalc.org




Daniel7073@aol.com wrote:

> In a message dated 12/16/1998 11:45:24 AM Pacific Standard Time,
> nblizard@bellsouth.net writes:
>
> >     Does anyone have a routine that will draw a white or inverted line
> >  or can they tell me what to change in fline, which is used in the
> >  linelib, so that will do it?
> >
>
> I don't think there's a line drawing function that supports this.  Basically,
> you would have to add a parameter in fline for write mode, then change fline
> to check the parameter and draw the pixel the right way.  This won't work if
> fline just calls the ROM functions though.  You'll have to write your own line
> drawing function.  (I have an algorithm for it if you're interested.)
>
> Daniel Imfeld
>
> Daniel Imfeld

      I take that algorithm.  Also, does anyone know the basis behind a line
drawing routine and how it works so I may be able to make my own?

References:

Re: A89: White/Invert Line

From: Daniel7073@aol.com

Prev: Re: A89: How to turn a 3d voxel into a 2d pixel
Next: A89: General Question
Index(es):
- Main
- Thread