glsl infinity constant

Question

Does GLSL have any pre-defined constants for +/-infinity or NaN? I\'m doing this as a workaround but I wonder if there is a cleaner way:

// GLSL FRAGMENT SHA         


        

Answer 1

This might work?

const float pos_infinity = uintBitsToFloat(0x7F800000);
const float neg_infinity = uintBitsToFloat(0xFF800000);

"If the encoding of a floating point infinity is passed in parameter x, the resulting floating-point value is the corresponding (positive or negative) floating point infinity"