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Shader blocks separation commands #if #ifdef #if defined #ifndef

Discussion in 'Shaders' started by vladstorm_, Oct 17, 2015.

  1. vladstorm_

    vladstorm_

    Joined:
    Nov 26, 2013
    Posts:
    184
    Hi,

    What is there difference between these commands in unity shaders:
    #if FEATURE
    #ifdef FEATURE
    #if defined(FEATURE)
    and
    #ifndef FEATURE

    ?
    I hope first 3 are equal and the last mean if FEATURE is not defined. but im not sure.
     
    vladstorm_, Oct 17, 2015
    #1

  2. colin299

    colin299

    Joined:
    Sep 2, 2013
    Posts:
    176
    colin299, Jun 8, 2016
    #2
    Pr0x1d, Dance_M, wechat_os_Qy06eaOhICF9NcZoMWMLtv5cI and 1 other person like this.