Name
abs - returns absolute value of scalars and vectors.
Synopsis
float abs(float a); float1 abs(float1 a); float2 abs(float2 a); float3 abs(float3 a); float4 abs(float4 a); half abs(half a); half1 abs(half1 a); half2 abs(half2 a); half3 abs(half3 a); half4 abs(half4 a); fixed abs(fixed a); fixed1 abs(fixed1 a); fixed2 abs(fixed2 a); fixed3 abs(fixed3 a); fixed4 abs(fixed4 a);Parameters
- a
- Vector or scalar of which to determine the absolute value.
Description
Returns the absolute value of a scalar or vector.
For vectors, the returned vector contains the absolute value of each element of the input vector.
Reference Implementation
abs for a float scalar could be implemented like this.
float abs(float a) { return max(-a, a); }Profile Support
abs is supported in all profiles.
Support in the fp20 is limited.
Consider abs to be free or extremely inexpensive.
See Also