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

https://persianmystic.com/index.php/Line_Set_Vacuuming_Steps_for_Mini_Split_Installations

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.