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Article:
  Bitmap Image Filters
Subject:   friend Dan Van Bose in Fort Worth explained syntax
Date:   2002-08-11 14:40:41
From:   psheldon
Response to: ah you had given me support by giving me a problem to solve

c = boolean ? a : b


c evaluates to first symbol after ? if boolean true and second expression if false.


So, this sentence commands skipping by an offset if Alpha is there and mixing 3 colors only.


I understand now.