Subject: Re: [stella] Polar to Cartesian CoOrdinate Converter From: "Thomas Jentzsch" <tjentzsch@xxxxxx> Date: Mon, 22 Oct 2001 17:17:46 +0200 
Roger Wiliam wrote: > this is the proof of concept demo for my polar to cartesian > coordinate converter, which?does the operation in 93 to > 114 machine cycles. Very cool! And it should be very possible to handle 3Dcoordinates that way too. > The secret to this algorithm is logarithms (now there's > a word I bet you never thought you'd read in this list). > The source is fully documented with theory and I have > placed it in the public domain.? While I knew the square tables based multiplication, the logarithmic formulas are new to me (or maybe I've forgotten them since school). Thanks! Especially the fast division may open some new opportunites. To bad, that I can't use them for my new demo, since I need the remainder too :( You don't know a formula for this, do you? I guess, the rounding error could be further reduced by using 16 bit value tables (for LOG only of course :) Correct? _______________________________________________________________________ 1.000.000 DM gewinnen  kostenlos tippen  http://millionenklick.web.de IhrName@xxxxxx, 8MB Speicher, Verschluesselung  http://freemail.web.de  Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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