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並前往https://forum.unity.com/threads/shader-blocks-separation-commands-if-ifdef-if-defined-ifndef.361703/

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

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

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查詢 「#If defined」的人也找了：

  1. if not defined
    2.
  2. If defined C++
    3.
  3. Elif defined
    4.
  4. if c
    5.
  5. if 1
    6.
  6. if #else
    7.
  7. elseif defined
    8.
  8. if c#
    9.