# RetroBASIC

## Basicprogramming(.org) => Code and examples => Topic started by: Aurel on September 17, 2019, 07:13:39 am

Title: Archimedes spiral
Post by: Aurel on September 17, 2019, 07:13:39 am
in LogicBasic:

Code: [Select]
`Var T Decimal, A Decimal, R Decimal, Xs Decimal, Ys DecimalVar X0 Decimal, Y0 Decimal, X1 Decimal, Y1 DecimalWindow Res = 150, 250T = 0.7 'starting point of spiralA = 0.03 'increment size - spiral trail widthXs = 125; Ys = 75X0 = 0; Y0 = 0 'start point of lineWhile 1 = 1  R = A * T   X1 = R * Cos(T) * 50  Y1 = R * Sin(T) * 50  Straight Ys + Y0, Xs + X0, Ys + Y1, Xs + X1, Black  X0 = X1; Y0 = Y1  T = T + A  Wait EventsLoop`
Title: Re: Archimedes spiral
Post by: Galileo on September 17, 2019, 09:20:36 am
Code: [Select]
`// Ported from ZX81 Sinclair BASIC to Yabasic by Galileo, 10/20185 OPEN WINDOW 320, 200 : WINDOW ORIGIN "CC"10 LET A=1.520 LET B=0.730 FOR T=0 TO 30*PI STEP 0.0540 LET R=A+B*T50 LINE TO R*COS(T),R*SIN(T)60 NEXT T`
Title: Re: Archimedes spiral
Post by: Galileo on September 17, 2019, 09:23:46 am
Text mode in iBASIC

Code: [Select]
`1 REM iBASIC version 09/20195 screen window mode 45,607 window title "Espiral arquimediana"10 LET A=1.520 LET B=0.730 FOR T=0 TO 7*PI STEP 0.0540 LET R=A+B*T45 let x = R*COS(T)+32 : let y = R*SIN(T)+2250 locate y,x : print "*"60 NEXT T70 input "",a\$`
Title: Re: Archimedes spiral
Post by: B+ on September 17, 2019, 04:43:05 pm
I made a little modification of Archimedes Spiral:
Title: Re: Archimedes spiral
Post by: Aurel on September 18, 2019, 09:43:44 am
Nice one Mark and Galileo too  :)
I just found it on LogicBasic forum..
hmm this LogicBasic seems very nice dialect...
Title: Re: Archimedes spiral
Post by: B+ on September 18, 2019, 03:29:34 pm
Hey Aurel! Looks like this LogicBasic is just getting started:
Title: Re: Archimedes spiral
Post by: Aurel on September 18, 2019, 05:41:03 pm
Maybe 1-2 years old ..i think