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

in LogicBasic:
Var T Decimal, A Decimal, R Decimal, Xs Decimal, Ys Decimal
Var X0 Decimal, Y0 Decimal, X1 Decimal, Y1 Decimal
Window Res = 150, 250
T = 0.7 'starting point of spiral
A = 0.03 'increment size  spiral trail width
Xs = 125; Ys = 75
X0 = 0; Y0 = 0 'start point of line
While 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 Events
Loop

// Ported from ZX81 Sinclair BASIC to Yabasic by Galileo, 10/2018
5 OPEN WINDOW 320, 200 : WINDOW ORIGIN "CC"
10 LET A=1.5
20 LET B=0.7
30 FOR T=0 TO 30*PI STEP 0.05
40 LET R=A+B*T
50 LINE TO R*COS(T),R*SIN(T)
60 NEXT T

Text mode in iBASIC
1 REM iBASIC version 09/2019
5 screen window mode 45,60
7 window title "Espiral arquimediana"
10 LET A=1.5
20 LET B=0.7
30 FOR T=0 TO 7*PI STEP 0.05
40 LET R=A+B*T
45 let x = R*COS(T)+32 : let y = R*SIN(T)+22
50 locate y,x : print "*"
60 NEXT T
70 input "",a$

I made a little modification of Archimedes Spiral:

Nice one Mark and Galileo too :)
I just found it on LogicBasic forum..
hmm this LogicBasic seems very nice dialect...

Hey Aurel! Looks like this LogicBasic is just getting started:

Maybe 12 years old ..i think
I never download it and try..