August 2nd, 2019, 09:37 AM  #1 
Newbie Joined: Aug 2019 From: Brazil Posts: 1 Thanks: 0  calculate C position
I need to calculate x and z of C Here are the informations that I have: > P (xp, yp, zp) > C (xc, yc, zc) = (xc, yp + h, zc) > F (xf, yf, zf)  C is given by the intersection of l and the circumference n  l is the line that passes through F, m and n * n is a circumference of radius r and center (xp, yp + h, zp) (in the plane xz) * m is a line parallel to Y axis that passes through P obs: l does not necessarily passes through the center of n as the drawing suggests. If I'm not wrong, this only happens when yf = yc. In this case, there would be two intersections of l and n. If so, C is given by the one farthest from F. thanks in advance =) 

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