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Question by ArthurGCGCGC · Jun 27, 2016 at 02:58 PM · shadershader programming

What is the max value of 'Fixed' data type?

I'm reading one book about shaders and in one of the tutorials inside it I saw the following :

 Properties 
     {
         _ScrollXSpeed ("X Scroll Speed", Range(0, 10)) = 2
         _ScrollYSpeed ("Y Scroll Speed", Range(0, 10)) = 2
     }
 
 SubShader 
     {
         ...
         fixed _ScrollXSpeed;
         fixed _ScrollYSpeed;
         ...
     }

But the unity docs tells me the following:

fixed

Lowest precision fixed point value. Generally 11 bits, with a range of –2.0 to +2.0 and 1/256th precision.

If the range of fixed is -2.0 to +2.0 how can I pass 10 to _ScrollXSpeed without an overflow? I tested the shader that uses this parameters and the variable is not capped at 2.

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