Line-of-Sight

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For other uses see Line of sight
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Consider points A and B in two dimensions:

Image:LOS.PNG

The line of sight (LOS) between A and B can be calculated as:

\lambda = \arctan 2\left( {\Delta y/\Delta x} \right)

Where

Δy = y2 − y1
Δx = x2 − x1