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

https://wiki-nest.win/index.php/How_HVAC_Line_Set_Quality_Impacts_Total_System_Performance

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.