How do I perform bit operations in glsl
How do I perform bit operations in glsl?
Using the regular开发者_开发技巧 C style bitwise operators |
, &
, ^
, or !
does not work.
They have been introduced with GLSL 1.30 (OGL 3.0).
Depending on what you want to do, you could eventually emulate them with floating point operations, x & (2^n)-1 = frac(x/(2^n))*(2^n)
for example, but you'll have to take care of floating point errors.
You need to put either
#version 130
or
#extension GL_EXT_gpu_shader4 : enable
in the top of your shader to get access to the bit operators
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