length

> # NAME

> length - return scalar Euclidean length of a vector

> # SYNOPSIS

>       float length(float v);
>       float length(float1 v);
>       float length(float2 v);
>       float length(float3 v);
>       float length(float4 v);

>       half length(half v);
>       half length(half1 v);
>       half length(half2 v);
>       half length(half3 v);
>       half length(half4 v);

>       fixed length(fixed v);
>       fixed length(fixed1 v);
>       fixed length(fixed2 v);
>       fixed length(fixed3 v);
>       fixed length(fixed4 v);

> # PARAMETERS

> v

>   Vector of which to determine the length.

> # DESCRIPTION

> Returns the Euclidean length of a vector.

> # REFERENCE IMPLEMENTATION

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

>       float length(float3 v)
>       {
>         return sqrt(dot(v,v));
>       }

> # PROFILE SUPPORT

> length is supported in all profiles.

> Support in the fp20 is limited.

> # SEE ALSO

> max, normalize, sqrt, dot