The Book of Shaders by Patricio Gonzalez Vivo


Inversesqrt

Return the inverse of the square root of the parameter

Declaration

float inversesqrt(float x)  
vec2 inversesqrt(vec2 x)  
vec3 inversesqrt(vec3 x)  
vec4 inversesqrt(vec4 x)

Parameters

x specify the value of which to take the inverse of the square root.

Description

inversesqrt() returns the inverse of the square root of x.

See Also

pow, sqrt, Chapter 05: Shaping Functions