A polygon footprint to classify: its exterior ring as world-space [x0,z0,x1,z1,…] (current frame, open ring — no repeated closing vertex), and the vertex count.
[x0,z0,x1,z1,…]
Exterior ring, interleaved world-space XZ (count vertices → count*2 floats).
count
count*2
Vertex count (ring length).
A polygon footprint to classify: its exterior ring as world-space
[x0,z0,x1,z1,…](current frame, open ring — no repeated closing vertex), and the vertex count.