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 [DPRG] math I once knew Message index sorted by: [ date ] [ thread ] [ subject ] [ author ] Previous message: [DPRG] Servo Prices Next message: [DPRG] math I once knew Subject: [DPRG] math I once knew From: Dave Hylands dhylands at broadcom.com Date: Fri Dec 20 10:08:01 CST 2002 ```Hi Sluggy, I think that this is what you want: x = r * sin( theta ) y = r * cos( theta ) -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ > -----Original Message----- > From: Sluggy! [mailto:slugmusk at linuxlegend.com] > Sent: Friday, December 20, 2002 7:50 AM > To: dprg > Subject: [DPRG] math I once knew > > > Hey, folks... > > I have a question about some math I once knew but don't remember the > details of. > > I need to be able to plot X and Y coordinates for points laying in a > circle, in this case, the minute and hour points on a clock face. > > I used to do this all the time drawing circles and radar > screens and the > like on the Commodore 64 and even on my first IBM clone. Thus far, > everything I have found online seems to be a tool to give you > back the > picture, not the coordinates for the points. > > As I recall, the algorithm was such that you plug in the > coordinates of > the center point, units of diameter and an an angle in degrees for a > given point. To scribe a circle, you simply stepped through > the range on > 0 to 359 for the angle, drawing a line between each set of points. > Actually, I think there were two steps, one for the X coordinate, one > for the Y. > > Anyway, if anyone has a lead on this, it would be appreciated! :) > > Sluggy! > > _______________________________________________ > DPRGlist mailing list > DPRGlist at dprg.org > http://nimon.ncc.com/mailman/listinfo/dprglist > ``` Previous message: [DPRG] Servo Prices Next message: [DPRG] math I once knew Message index sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the DPRG mailing list