Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!ukma!psuvm.bitnet!cunyvm!byuvax!loganj From: loganj@byuvax.bitnet Newsgroups: comp.sys.mac.programmer Subject: Mac II color graphics & animation questions Message-ID: <210loganj@byuvax.bitnet> Date: 24 Jun 88 00:23:27 GMT Lines: 20 We are converting our widely distributed 3-D Graphics program "Movie BYU" to Macintosh II, and we have questions about the color graphics: 1. We found that animation on a Macintosh II color screen slows down significantly if you simply move the window position away from the left edge of the screen (or any position where x != 0). Why, and is there any workaround? 2. We need to produce color graphics by scan lines (for raster devices), and doing this one pixel at a time is too slow. Any suggestions? What is the fastest way of creating and displaying a single horizontal color line which spans the width of the screen? In these horizontal color lines the color may change with each pixel. We have thought of creating a one line pixelmap in memory and somehow setting the color of pixels directly from our program code before "copybits" the line to the screen - what do you think of that? Please respond directly to loganj@byuvax.bitnet Thanks jim (loganj@byuvax.bitnet)