===== Primitive: Convolution with set of skeleton line segments =====

**Definition**: <m>sum{}{}{f(r)}</m>\\
f(x) is analytical convolution for a segment with Cauchy kernel [McCormack and Sherstyuk 1998]\\
r - distance to a skeleton point

**Call**: hfConvLine(x,begin,end,S,T);

**Parameters**:

x - point coordinates

begin - starting points coordinate array for line segments

end - ending points coordinate array for line segments

S - array of kernel width control parameters for each line segment

T - threshold

**Test file**: [[http://hyperfun.org/convline.hf|convline.hf]]