[futurebasic] Re: [FB] [x-fb] Trig functions for ellipses

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From: pochas <pochas@...>
Date: Fri, 20 Aug 1999 08:30:04 -0400
> 
> Subject: Re: [FB] [x-fb] Trig functions for ellipses
> Date: Fri, 20 Aug 1999 00:12:58 -0700
> From: Joe Lewis Wilkins <PepeToo@...>
> To: futurebasic@...
> 
> Mark wrote:
> 
> <I'd like to write a program that draws sine waves that are based on
> <ellipses instead of circles.  I'm strong in math but my actual
> <background is quite weak.  Does anyone know if there's a topic in math
> <that deals with this?  Any code?  All help will be appreciated.  Thanks
> <in advance.


WINDOW 1
A! = 30      'minor axis
B! = 50      'major axis
CALL MOVETO(100+B!,100)
FOR t=0 TO 360 
  y! = A! * SIN(t*3.14/180)+100
  x! = B! * COS(t*3.14/180)+100
  CALL LINETO (x!,y!)
NEXT
DO
  HANDLEEVENTS
UNTIL 0

Just pop this in your toaster :-)