CODEWITHSUNDEEP
openglopengl-esglsl
zeus
zeus

Reputation: 13357

How to compare float in GLSL scripts?

In my GLSL script i would like to compare float like this :

uniform float _Highlights;

if _Highlights <> 1 { doHighlights(...); }

but as _Highlights is a float I m afraid that if _Highlights <> 1 will always return true.

Upvotes: 0

Views: 4627

Answers (1)

Rabbid76
Rabbid76

Reputation: 210928

Fist of all, the "not equality" operator in GLSL is != and the condition has to be in parentheses. The correct syntax in GLSL would be:

if (_Highlights != 1.0)
{ 
    doHighlights(...); 
}

If you want to to check if _Highlights is a value near to 1.0, then you have to use an epsilon value:

const float eps = 0.001;
if ( abs(_Highlights - 1.0) > eps )
{
    doHighlights(...); 
}

Upvotes: 6

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