Types: D: float, px: float, py: float, vx: float, vy: float
Ranges: 0 < D ≤ 50, 0.0001 ≤ |V| ≤ 0.9999, 0.0001 ≤ |P| ≤ 0.9999
Addtl Info: Multiple datasets, terminate on D = 0