NAME
distance - return the Euclidean distance between two points
SYNOPSIS
float distance(float pt1, float pt2); float distance(float1 pt1, float1 pt2); float distance(float2 pt1, float2 pt2); float distance(float3 pt1, float3 pt2); float distance(float4 pt1, float4 pt2); half distance(half pt1, half pt2); half distance(half1 pt1, half1 pt2); half distance(half2 pt1, half2 pt2); half distance(half3 pt1, half3 pt2); half distance(half4 pt1, half4 pt2); fixed distance(fixed pt1, fixed pt2); fixed distance(fixed1 pt1, fixed1 pt2); fixed distance(fixed2 pt1, fixed2 pt2); fixed distance(fixed3 pt1, fixed3 pt2); fixed distance(fixed4 pt1, fixed4 pt2);PARAMETERS
- pt1
First point.
- pt2
Second point.
DESCRIPTION
Returns the Euclidean distance from a first point pt1 to a second point pt2.
REFERENCE IMPLEMENTATION
distance for a float3 vector could be implemented like this.
float distance(float3 pt1, float3 pt2) { float3 v = vt2 - pt1; return sqrt(dot(v,v)); }PROFILE SUPPORT
distance is supported in all profiles except fp20.
SEE ALSO