POV-Ray: Newsgroups: povray.general: select, is this logical?: select, is this logical?

POV-Ray : Newsgroups : povray.general : select, is this logical? : select, is this logical?		Server Time 28 Apr 2024 23:51:25 EDT (-0400)

From: John Greenwood
Date: 3 Oct 2016 08:10:00
Message: <web.57f249b74d2b4fa1a7cafab50@news.povray.org>

The first parameter of the select function acts as a logic switch but does not
respond correctly to a boolean variable, thus

  #declare Change = true;
  #declare Function = function( F){select(Change,F,-F)}

gives the same result for Change = false

  #declare Function = function( F){select(-Change,F,-F)}

works.

This is not consistant, but I suppose we are stuck with it.

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