Programmers may define a line set as an array of polylines to accelerate hit-testing, pathfinding

https://wiki-cable.win/index.php/What_Contractors_Look_For_in_a_Reliable_HVAC_Line_Set

Programmers may define a line set as an array of polylines to accelerate hit-testing, pathfinding, and collision detection, using spatial indices to swiftly query segments in large interactive scenes.