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atan.3Cg
Langue: en
Version: 345624 (ubuntu - 24/10/10)
Section: 3 (Bibliothèques de fonctions)
NAME
atan - returns arctangent of scalars and vectors.SYNOPSIS
float atan(float a); float1 atan(float1 a); float2 atan(float2 a); float3 atan(float3 a); float4 atan(float4 a);
half atan(half a); half1 atan(half1 a); half2 atan(half2 a); half3 atan(half3 a); half4 atan(half4 a);
fixed atan(fixed a); fixed1 atan(fixed1 a); fixed2 atan(fixed2 a); fixed3 atan(fixed3 a); fixed4 atan(fixed4 a);
PARAMETERS
- a
- Vector or scalar of which to determine the arctangent.
DESCRIPTION
Returns the arctangent of x in the range of -pi/2 to pi/2 radians.For vectors, the returned vector contains the arctangent of each element of the input vector.
REFERENCE IMPLEMENTATION
atan for a float scalar could be implemented like this.float atan(float x) { return atan2(x, float(1)); }atan2 is typically implemented as an approximation.
PROFILE SUPPORT
atan is supported in all profiles but fp20.SEE ALSO
abs, acos, asin, atan2. sqrt, tanContenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre