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