alex@umbc3.UMD.EDU (Alex S. Crain) (12/15/87)
Hiya! I've started to draw things on my 3b1, and life bodes well except that there is no floating point hardware available for the machine. Since I'm partial to both ray tracing & mandelbrot sets, I've gotten used to starting the program and then going to bed. It occures to me that what I'm doing is fairly restrictive in its range, and fixed-point numbers would work well here with a significant speed increase. At this point I step into a gray area of my experiance however, So I'm looking for algoriths. If anyone can point me at a source of general purpose graphics algorithms that use integer/fixed-point math to calculate line slopes, angles, circles, etc. I would greatly appreciate it. Also, the machine supports basic bit map functions for AND OR & XORing of bit patterns. What are the rules of thumb for generating gray-scales? What are the affects of different patterns, and how do you predict them? What relationship do gray scale patters have to color? Where do I look for answers to these and other questions? ThanX in advance... :alex. alex@umbc3.umd.edu
jwhitnel@csi.UUCP (Jerry Whitnell) (12/17/87)
In article <642@umbc3.UMD.EDU> alex@umbc3.UMD.EDU (Alex S. Crain) writes: > If anyone can point me at a source of general purpose graphics >algorithms that use integer/fixed-point math to calculate line slopes, >angles, circles, etc. I would greatly appreciate it. You might also want to look at limited precisison floating point packages. I know of a couple that use only 32 bits that are resonably fast. I used these for generating Mandlebrot on my Mac Plus. Details on request. > :alex. Jerry Whitnell Lizzi Borden took an axe Communication Solutions, Inc. And plunged it deep into the VAX; Don't you envy people who Do all the things You want to do?