Physical setup & coordinate system
Node 3 --------------------- 0 --------------------- Node 2
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frame_dy | |
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0 - - - - - - - - - - - - * 0/0/0 - - - - - - - - - 0
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frame_dy | |
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Node 0 ----- frame_dx ------ 0 ----- frame_dx ------ Node 1
// frame dimensions, x and y are doubled, 0 is the frame center // z represents the height, positive up. 0 is x/y plane
