Scripted HTML version of Foils prepared 12 November 1996

Foil 12 Pipeline Algorithm for Grav -- Part II

From CPS615-End of N-Body Discussion and Beginning of Numerical Integration Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 15 October 96. by Geoffrey C. Fox *
Secs 38.8
!Shift Circulating Arrays Xc Mc Ac to the right
  • Xc = cshift (Xc, dim=2, shift = -1)
  • Mc = cshift (Mc, dim=2, shift = -1)
  • Ac = cshift (Ac, dim=2, shift = -1)
! calculate R to be distance over 3-D cordinates
  • D= Xc-X
  • R = sqrt (spread (sum (D*D, dim=1), dim=1, ncopies=3)))
  • D = D/R**3
  • A = A + Mc*D ! fixed acceleration
  • Ac = Ac - M*D ! circulating acceleration
  • end do

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