#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. i.e., the value $$ \frac{1}{\sqrt{x}} $$ Results are undefined if 𝑥≤0.

#See Also

• sqrt