Clearance is sometimes half width, sometimes full width

[stevenlau]

What is clearance?

It is 0.8 for most units.  Roughly regarded as the size of a unit.  Reference:

https://gitea.wildfiregames.com/0ad/0ad/src/branch/main/binaries/data/mods/mod/simulation/data/pathfinder.xml#L58

Clearance as full width

In the calculation of pushing, each unit is first considered as a 0.8 × 0.8 square.  Then the radius of the circumscribing circle is 0.8 × √2 ÷ 2.  Reference:

https://gitea.wildfiregames.com/0ad/0ad/src/branch/main/source/simulation2/components/CCmpUnitMotion_System.cpp#L78

Clearance as half width

In regarding unit as obstruction, each unit is considered as an axis aligned 1.6 × 1.6 square.  Reference:

https://gitea.wildfiregames.com/0ad/0ad/src/branch/main/source/simulation2/components/CCmpObstructionManager.cpp#L305

Edited April 2 by stevenlau