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| subject: | Need sqrt() algorithm |
JDBP>RB> JDBP> > I don't want to use the standard C sqrt() JDBP> > function because I am not using floating point for anything JDBP> > else. JDBP>RB> JDBP> It doesn't matter whether you are or you aren't. Worrying about JDBP> avoiding floating point doesn't actually gain you very much under JDBP> OS/2. It's DOS-think. Actually, I am doing a considerable amount of "floating point" math using fixed point integer math to do 3-D projections. The reason I don't want to use floating point is that integer math is faster than floating point EVEN WITH A COPROCESSOR especially for addition and subtraction, without a coprocessor and running software emulation like OS/2 provides, performance really goes into the toilet. I am using 32 bit integers to represent floating point values, I don't need tons of precision, but I do need **SPEED**, and this gives it to me. If you are interested in a discussion of fixed point mathematics, check out "Flights of Fantasy" by Christopher Lampton, it is a "how to" book on flight simulators. Rob. ___ X SLMR 2.1a X All wiyht. Rho sritched mg kegtops awound? --- Maximus/2 2.01wb* Origin: The Idle Task... (604)275-0835 Richmond BC. (1:153/905) SEEN-BY: 12/2442 54/54 620/243 624/50 632/348 640/820 690/660 711/409 410 413 SEEN-BY: 711/430 807 808 809 934 942 949 712/353 623 713/888 800/1 @PATH: 153/905 828 7041 3615/50 229/2 12/2442 711/409 54/54 711/808 809 934 |
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