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Internet Message Format  |  1999-08-02  |  5KB
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  9. From: "Sasu Lintula" <samali@utu.fi>
  10. To: "Amos-list" <amos-list@onelist.com>
  11. Date:     Sun, 11 Jul 1999 19:36:30 +0300
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  22. Subject: [amos-list] Vs:  Cool effects, etc
  23. Status: O
  24. X-Status: 
  25.  
  26. From:    "Sasu Lintula" <samali@utu.fi>
  27.  
  28.  
  29. Hi all,
  30. what I explained to Leto of Set Bob 'bitmap'-values wasn't of course correct
  31. at all. Here's real results what you get when using Set Bob -command on a
  32. screen with 4 bitplanes:
  33.  
  34. 'bitplanes'    bgcol    result
  35. %1                    0            1
  36.                           1            1
  37.                           2            3
  38.                           3            3
  39.                           4            5
  40.                           5            5, etc...
  41. This happens when you use odd numbered colour in your bob.
  42. The result is opposite 1=>0, etc. when using even numbered colours.
  43.  
  44.  
  45. %10                  0           0
  46.                           1            1
  47.                           2            0
  48.                           3            1
  49.                           4            4
  50.                           5            5
  51.                           6            4
  52.                           7            5, etc...
  53. Like before effects are opposite when use even colours.
  54.  
  55. %11                  0            1
  56.                           1            1
  57.                           2            1
  58.                           3            1
  59.                           4            5
  60.                           5            5
  61.                           6            5
  62.                           7            5
  63.                           8            9, etc...
  64. This happens when you use ink 1 in your bob. If you have f.e.x colour 2 in
  65. your
  66. bob results will be: bgcol 0 to 3 => 2, 4 to 7 =>6, etc...
  67. The results'll be same for every fourth colour so there's no point using any
  68. other
  69. colours in bob than 0 to 3.
  70.  
  71. %110                0            0
  72.                            1            1
  73.                            2            0
  74.                            3            1
  75.                            4            0
  76.                            5            1,...
  77.                        ...,8            8
  78.                            9            9
  79.                          10            8, etc...
  80. This happens when using ink 1 (or 0). Like before the results'll change when
  81. bobs
  82. colour is other than 0/1. There's no point using more than lower eight
  83. colours for
  84. bob as the results'll be same on every 8th colours.
  85.  
  86. %111                0            1
  87.                            1            1
  88.                            2            1,...
  89.                        ,...7            1
  90.                            8            9
  91.                            9            9, etc...
  92. Like before the result colours are dependent from bob colours.
  93.  
  94. %1110              0            0
  95.                            1            1
  96.                            2            0
  97.                            3            1,...
  98.                      ,...14            0
  99.                          15            1
  100. This is what I used in creating transparent explosions. All colours
  101. will be masked to those two colours used to draw bob (0/1,2/3,4/5,...).
  102.  
  103. %1111            This is normal bob - all bitplanes in use.
  104.  
  105. Hope this help you to create nasty effects:)
  106. btw, it's vice to use Set Bob command when you have bobs that don't use all
  107. bitplanes.
  108. Mask out all unnecessary bitplanes and you can easily double number of bobs
  109. / vbl.
  110.  
  111. [Sasu Lintula]
  112.  
  113.  
  114.  
  115.  
  116.  
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