frac.3Cg

Langue: en

Version: 348368 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

frac - returns the fractional portion of a scalar or each vector component.

SYNOPSIS

   float  frac(float a);
   float1 frac(float1 a);
   float2 frac(float2 a);
   float3 frac(float3 a);
   float4 frac(float4 a);
 
 
 

   half   frac(half a);
   half1  frac(half1 a);
   half2  frac(half2 a);
   half3  frac(half3 a);
   half4  frac(half4 a);
 
 
 

   fixed  frac(fixed a);
   fixed1 frac(fixed1 a);
   fixed2 frac(fixed2 a);
   fixed3 frac(fixed3 a);
   fixed4 frac(fixed4 a);

PARAMETERS


a
Vector or scalar of which to return its fractional portion.

DESCRIPTION

Returns the fractional portion of a scalar or each vector component.

REFERENCE IMPLEMENTATION

frac for a float scalar could be implemented like this. 
   float frac(float v)
   {
     return v - floor(v);
   }

PROFILE SUPPORT

frac is supported in all profiles except fp20.

SEE ALSO

ceil, floor, round, trunc