Re: A83: Re: Animation with _ILine

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Re: A83: Re: Animation with _ILine


i posted the wrong routine to void.  The one on the website is unable to 
draw a line in which the line has a positive slope (ie. c > e for the input 
registers).  I think i'll make another one that reverses the registers in 
order to make it work if d>b also.  It should be available by tomorrow.

-harper

At 03:34 PM 8/23/00 -0400, you wrote:

>I'm probably doing something dumb, but I can't seem to figure out your line
>routine Harper.  I was curious, so I wrote a prog that draws lots of lines
>from the upper left corner of the screen to all the points on the bottom row
>of the screen a few times each (total of 940 lines) to see how the speed
>compared between plotline,fastline, and ILine.  However, for some reason I
>can't get plotline to display the lines in the right places.  I've uploaded
>a zip (http://tcpa.calc.org/members/dan/lines.zip) which contains the source
>and 83 Plus binary of the program.  First it does plotline, then fastline,
>then ILine.  If you test it on a real 83 Plus, or VTI, you'll see that
>fastline and ILine both do the same thing (large black triangle in the lower
>left of the screen), but plotline does something else altogether.  Perhaps I
>messed up my inputs on plotline or something, but they seem correct to me.
>
>I took screen shots of each so you can see what I mean:
>plotline - http://tcpa.calc.org/members/dan/plotline.bmp
>fastline - http://tcpa.calc.org/members/dan/fastline.bmp
>iline - http://tcpa.calc.org/members/dan/iline.bmp
>
>Tell me what you think,
>-Dan
>----- Original Message -----
>From: "Harper Maddox" <gte172i@prism.gatech.edu>
>To: <assembly-83@lists.ticalc.org>
>Sent: Wednesday, August 23, 2000 2:27 PM
>Subject: Re: A83: Re: Animation with _ILine
>
>
> >
> > i also have a line drawing routine, which is loosely based on bresham's
> > line drawing algorithm.  It's fairly efficient, but i'm not sure how it
> > compares to dan's.  Check it out at http://void.calc.org/programming/
> >
> > -harper
> >
> >
References: