Name

max - returns the maximum of two scalars or each respective component of two vectors

Synopsis

float  max(float  a, float  b);
float1 max(float1 a, float1 b);
float2 max(float2 a, float2 b);
float3 max(float3 a, float3 b);
float4 max(float4 a, float4 b);

half   max(half  a, half  b);
half1  max(half1 a, half1 b);
half2  max(half2 a, half2 b);
half3  max(half3 a, half3 b);
half4  max(half4 a, half4 b);

fixed  max(fixed  a, fixed  b);
fixed1 max(fixed1 a, fixed1 b);
fixed2 max(fixed2 a, fixed2 b);
fixed3 max(fixed3 a, fixed3 b);
fixed4 max(fixed4 a, fixed4 b);

Parameters

a

Scalar or vector.

b

Scalar or vector.

Description

Returns the maximum of two same-typed scalars a and b or the respective components of two same-typed vectors a and b. The result is a three-component vector.

Reference Implementation

max for float3 vectors could be implemented this way:

float3 max(float3 a, float3 b)
{
  return float3(a.x > b.x ? a.x : b.x,
                a.y > b.y ? a.y : b.y,
                a.z > b.z ? a.z : b.z);
}

Profile Support

max is supported in all profiles. max is implemented as a compiler built-in.

Support in the fp20 is limited.

See Also

clamp, min