Collision Flags

The flags of A3D_COLLIDE pick the kinds of body a query sees and a moving object collides with.

Flag	Value	Bodies
A3D_COLLIDE_MAP	1	The map objects of the game
A3D_COLLIDE_OBJECTS	2	Moving physics objects
A3D_COLLIDE_STATIC	4	Static objects
A3D_COLLIDE_PLAYERS	8	Players on foot
A3D_COLLIDE_VEHICLES	16	Vehicles
A3D_COLLIDE_WATER	32	The surface of the water, for queries only
A3D_COLLIDE_ACTORS	64	Actors
A3D_COLLIDE_ALL	95	Every kind of body, without the water

Combine flags with | and take one out of a set with & ~:

new A3D_COLLIDE:sight = A3D_COLLIDE_MAP | A3D_COLLIDE_STATIC | A3D_COLLIDE_VEHICLES;
new A3D_COLLIDE:noPlayers = A3D_COLLIDE_ALL & ~A3D_COLLIDE_PLAYERS;
new A3D_COLLIDE:wet = A3D_COLLIDE_ALL | A3D_COLLIDE_WATER;

In queries

Every query that takes flags sees only the bodies they name. Rays, sweeps and overlaps default to A3D_COLLIDE_ALL. A3D_IsLineOfSight and A3D_FindGround default to A3D_COLLIDE_MAP | A3D_COLLIDE_STATIC. With A3D_COLLIDE_WATER, rays, sweeps and lines of sight stop at the water. See World queries.

On moving objects

A3D_SetCollisions picks what a moving object collides with, A3D_COLLIDE_ALL by default. The water flag has no effect there, since objects float with A3D_SetBuoyancy instead. Two moving objects collide only when both hold A3D_COLLIDE_OBJECTS.