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   comp.sys.apple2      Discussion about Apple II micros      56,720 messages   

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   Message 55,874 of 56,720   
   Kent Dickey to Michael J. Mahon   
   Re: FASTCIRC--High-speed circles for HGR   
   25 Oct 22 04:56:25   
   
   From: kegs@provalid.com   
      
   In article ,   
   Michael J. Mahon  wrote:   
   >If you've ever wanted to create HGR graphics containing circles of   
   >various sizes, you’ve probably been disappointed with the slow drawing   
   >speed.  The straightforward method using sines and cosines can take   
   >several seconds per circle.   
   >   
   >I’ve just added a short (374 bytes) subroutine, FASTCIRC, to my website   
   >that draws circles in from 22 to 75 milliseconds, depending on radius.   
   >It’s self-relocating, so you can BLOAD it anywhere convenient.   
   >   
   >To use FASTCIRC, the center (Xlo, Xhi, Y) and the radius are POKEd into   
   >locations 6, 7, 8, and 9 and FASTCIRC is CALLed at its load address.   
   >   
   >My website has more complete documentation and a FASTCIRC.DSK image   
   >containing FASTCIRC, its Merlin source, and several demo programs to   
   >illustrate its use.   
   >   
   >Time to have fun with circles!   
   >--   
   >   
   >-michael   
      
   Very cool little program, it draws fast circles.   
      
   The FASTCIRC.dsk image is actually in ProDOS order.  Could you rename   
   the image to FASTCIRC.po?   
      
   Kent   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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