Lorenz attractor - help

JLS

Hi all

Im new propeller user and teaching basic programming

Is possible help me with basic FloatMath example ? specialy Lorenz attractor ?

(im using Arduino and any attractor programming not problem in arduino wire code)

Please help me - very very THANKS

Sorry my bad english

Mike Green

There's nothing complicated about floating point programming on the Propeller. It's all function calls.

A := B + C

becomes

A := FAdd(B, C)

and

D := - E

becomes

D := FNeg(E)

If you have something more complex, you can either separate it out into individual operations or nest the functions calls.

A := (B + C) * (D - E)

becomes

A := FMul( FAdd( B, C ) , FSub( D, E ) )

Read the documentation that comes with the floating point library from the Propeller Object Exchange. It shows you the routines that come with each version of the library. FloatMath is written in Spin, so it's relatively slow. I recommend using one of the assembly language versions instead.

ElectricAye

I've attached a little more info on FloatMath.

JLS

Very thanks info and examples :-)

And little question - is possible convert floating value to integer ? (for controlling sound or lcd etc...)

example floating value 1.256

integer value 1256

not rounded like 1

thanks

MacGeek117

Absolutely, just multiply your fp number by 1000 in your case, and then truncate.
MG117

Mike Green

That would be: FTrunc(FMul(1.256,1000.0))

JLS

many thanks :-)

JLS

My first working code :-)

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Thanks previous help

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