Given n balls of radius r and the vector p (nx3) with all position (x,y,z) of the balls, return the symmetric matrix A (nxn) containing all distance between the centroid of all balls (diagonal terms should be all 0).
Two or more balls can overlap.
I think there is some rounding difference here... :-(
Back to basics 17 - white space
Add two numbers
04 - Scalar Equations 1
07 - Common functions and indexing 2
subtract central cross
Center of mass
frame of the matrix
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