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  1. >From bounce-amos-list--994-mcox=access.digex.net@onelist.com  Mon Sep  7 08:23:29 1998
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  9. From: Andrew Crowe <andrewcrowe@enterprise.net>
  10. To: amos-list@onelist.com
  11. Date: Mon, 07 Sep 1998 13:16:00 +0000
  12. Message-ID: <yam7554.37.1191845344@mail.enterprise.net>
  13. In-Reply-To: <4A256678.00088B70.00@ns-it062791.qantas.com.au>
  14. X-Mailer: YAM 2.0 Preview5 - Amiga Mailer by Marcel Beck - http://www.yam.ch
  15. Organization: Manta Soft
  16. Mailing-List: list amos-list@onelist.com; contact http://www.onelist.com
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  21. Content-Type: text/plain
  22. Subject: [amos-list] Re: Rotating Stuff
  23. Status: O
  24. X-Status: 
  25.  
  26. From: Andrew Crowe <andrewcrowe@enterprise.net>
  27.  
  28. Hi Everybody,
  29.  
  30. On 07-Sep-98, pbrowne@qantas.com.au wrote something which is obviously
  31. worth replying to:
  32.  
  33. > Anyway, my challenge was to make an object made of a series of (x,y)
  34. > co-ordinates, joined together by Draw commands and then Rotate that
  35. object
  36. > about a nominated point (central to the object, naturally - or close
  37. to
  38. > it).  The points (x,y)'s would be recalculated and then Draw(n)
  39. together
  40. > again.
  41.  
  42.     The easy way to do this is not to store the points in (x,y) but as
  43. (angle from center,distance from center). Then use Sin and Cos to draw
  44. the lines in. To convert an X,Y point you'd have to use trig. functions.
  45. If you give me a little while then I sould be able to make a routine for
  46. you ;)
  47.  
  48.  
  49. See ya.
  50. -- 
  51.                                 <PRE>
  52.   - --------------------- Quote of the day: ---------------------- -
  53. Man will occasionally stumble over the truth, but most times he will
  54. pick himself up and carry on...
  55. -- Winston Churchill
  56.  
  57. +--------------------------------------------------------------------+
  58. |                                                ,aNNN               |
  59. |  a&   NL                 ,a,                 ,gNNNNN               |
  60. |  @7L d 0   ,a,,aw ,a,,  JN Q,  ,a,,aw,,,,  ,gNM"`NN'               |
  61. | J  9w"  K N" "" NN"""""WF  ~3&N" "" N   ""^N"    NF                |
  62. | N , " , Nd ,@M, NN JML @ML d@N ,@4, N       ',  JK                 |
  63. |d JMc dN  N  NN  NN 0 1 1J1 0 0  NN  N         L,K                  |
  64. |N,N 0w' Na@h,,a,,NQ,0 &J1J&,0  \,,a,,N         JF                   |
  65. | ""  "  ~"  ""~"""~"" ""  """  t""~"""        j"1                   |
  66. |                               F             JgmJ        ,gm        |
  67. |                               F            N"  N  ,,    F ,N gNN   |
  68. |      Andrew Crowe             Q          jJF  mP p""9w,NL NwmP 0mw |
  69. |      ~~~~~~~~~~~~             ]         / I  0 F@ am, Nw  ,0&   ,N |
  70. |       Manta Soft             ,F\      a' ,N  Nf L E 0 0ML N""N 0"  |
  71. |       ~~~~~~~~~~            ,N  \,  ,P N@"  JF  & `@" NJL N  N 0   |
  72. |                            ,N     ad"   \wam"   `Nx,aN JNmN  NmN   |
  73. |                            NN ,,gN" ""PP"                          |
  74. |                           dNNNNN"                                  |
  75. |                           NNN@"      Web Designing and          // |
  76. | Visit our Web Site:       ""               Amiga Programming \\//  |
  77. |                                                                    |
  78. |     HTTP://www.geocities.com/Eureka/Gold/1713/                     |
  79. |                                                                    |
  80. +----------------------------+      This signature was created using |
  81. | andrewcrowe@enterprise.net |         AsciiArt Studio               |
  82. +----------------------------+---------------------------------------+
  83.                                 </PRE>
  84.  
  85.  
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