hey matt yeah that does work out correctly. thank for the help... i figured i was using the "^" operator wrong here....
cheers m On Wed, Jan 25, 2017 at 11:10 AM, Matt Barber <[email protected]> wrote: > In expr, ^ is bitwise-exclusive-or, but you want exponentiation. Just > replace $f1^2 with $f1*$f1. > > On Wed, Jan 25, 2017 at 11:03 AM, me.grimm <[email protected]> wrote: > >> Hello, >> >> I am trying to calculate inverse kinematics in 2D space with 2 DOF >> according to this tutorial(1) and formulas within using [expr]. For some >> reason my calculations for "c2" using [expr] deliver quite a different >> result than the excel sheet calculation that the tutorial provides. >> >> What am I doing wrong here? It may be I don't quite understand how "^" is >> used? >> >> Using: >> Linkage 1 length of 5 >> Linkage 2 length of 4 >> >> and plotting my the end of joint 2 at (3.56, 6.43) I should get c2 to >> equal 0.3254625 but get 0.25 with [expr]. Because of this further >> calculations to get joint angles are also off, obviously. >> >> attached is patch. >> >> but maybe someone has already done this type of work which might save me >> some trouble... >> >> cheers >> m >> >> >> (1) http://www.societyofrobots.com/robot_arm_tutorial.shtml# >> inverse_kinematics >> >> -- >> ____________________ >> m.e.grimm, m.f.a, ed.m. >> syracuse u., tc3 >> megrimm.net >> ____________________ >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> https://lists.puredata.info/li >> stinfo/pd-list >> >> > -- ____________________ m.e.grimm, m.f.a, ed.m. syracuse u., tc3 megrimm.net ____________________
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