floor

> # NAME

> floor - returns largest integer not greater than a scalar or each vector component.

> # SYNOPSIS

>       float  floor(float a);
>       float1 floor(float1 a);
>       float2 floor(float2 a);
>       float3 floor(float3 a);
>       float4 floor(float4 a);

>       half   floor(half a);
>       half1  floor(half1 a);
>       half2  floor(half2 a);
>       half3  floor(half3 a);
>       half4  floor(half4 a);

>       fixed  floor(fixed a);
>       fixed1 floor(fixed1 a);
>       fixed2 floor(fixed2 a);
>       fixed3 floor(fixed3 a);
>       fixed4 floor(fixed4 a);

> # PARAMETERS

> a

>   Vector or scalar of which to determine the floor.

> # DESCRIPTION

> Returns the floor or largest integer not greater than a scalar or each vector component.

> # REFERENCE IMPLEMENTATION

> floor for a float3 vector could be implemented like this.

>       float3 floor(float3 v)
>       {
>         float3 rv;
>         int i;

>         for (i=0; i<3; i++) {
>           rv[i] = v[i] - frac(v[i]);
>         }
>         return rv;
>       }

> # PROFILE SUPPORT

> floor is supported in all profiles except fp20.

> # SEE ALSO

> ceil, round