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Internet Message Format  |  1999-08-02  |  3KB
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  8. From: Rune Zedeler <rune@zedeler.dk>
  9. To: Rune Zedeler <amos-list@onelist.com>
  10. Date: Sat, 03 Jul 1999 21:50:30 +0100
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  22. Subject: Re: [amos-list] Seemingly easy task...
  23. Status: O
  24. X-Status: 
  25.  
  26. From: Rune Zedeler <rune@zedeler.dk>
  27.  
  28. On 02-Jul-99, Rune Zedeler wrote:
  29.  
  30. >    Sqr((x+1)�+y�) - r > r - Sqr((x+1)�+(y-1)�)
  31.  
  32. >To get rid of the square roots we multiply all parts with them selves:
  33.  
  34. >    ((x+1)�+y�) - r� > r� - ((x+1)�+(y-1)�)
  35.  
  36. >Notice that the 2 inequations are not exactly the same - but they are very
  37. >close when the numbers are close to each other.
  38.  
  39. I made a test.
  40. The smallest radius on which the two routines do not do exactly the same is
  41. 2051.
  42.  
  43. That is: If your circles has smaller radii than 2051 then the two routines
  44. make identical circles.
  45. If your circles are getting bigger then a few pixels now and then will be
  46. different.
  47.  
  48. -- 
  49.  
  50.          /�\ __    __ /�����\           _         Rune Zedeler
  51. ________/ /// \\__/ \\\  ---/           \�-_      Rydev�nget 3,3th
  52. \      / //�|  \\/  ||�\ \\��������������   ï¿½-_   8210 ï¿½rhus V
  53.  )    / //  | \ ` / ||  \ \\ Lemmus of Efreet  -  Denmark
  54. /    / ï¿½ï¿½ï¿½ï¿½ï¿½\\|\-'/ /����� \\____________   _-�
  55. �����\------'/||��| \------'/           /_-�      rune@zedeler.dk
  56.       ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½\-'/  \-'/������            ï¿½         Tel: +45-86750655
  57.              ï¿½ï¿½    ï¿½ï¿½
  58.  
  59.  
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