19.01.2016, 18:22
If it's exactly in the middle:
(x1 + x2) / 2 = (-121.1 + -2071.3) / 2 = -2192.4 / 2 = -1096.2
(y1 + y2) / 2 = (3583.52 + 1603.2) / 2 = 5186.72 / 2 = 2593.36
(z1 + z2) / 2 = (16.1 + 49.5) / 2 = 65.6 / 2 = 32.8
Just take the average of both coordinates.
(x1 + x2) / 2 = (-121.1 + -2071.3) / 2 = -2192.4 / 2 = -1096.2
(y1 + y2) / 2 = (3583.52 + 1603.2) / 2 = 5186.72 / 2 = 2593.36
(z1 + z2) / 2 = (16.1 + 49.5) / 2 = 65.6 / 2 = 32.8
Just take the average of both coordinates.