INVERSESQRT(3G) [FIXME: manual] INVERSESQRT(3G)

# NAME¶

inversesqrt - return the inverse of the square root of the parameter

# DECLARATION¶

genType inversesqrt(genType x);

genDType inversesqrt(genDType 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 $1 \over { \sqrt x }$. The result is undefined if $x \leq 0$.

# VERSION SUPPORT¶

 OpenGL Shading Language Version Function Name 1.10 1.20 1.30 1.40 1.50 3.30 4.00 4.10 4.20 4.30 4.40 4.50 inversesqrt (genType) - - ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ inversesqrt (genDType) - - - - - - ✔ ✔ ✔ ✔ ✔ ✔

pow(), sqrt()

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