Gravity

Gravity in source is measured in units/second². The value is defined by sv_gravity, which defaults to 600 in Half-Life 2 (and episodes) and 800 in Valve's other games.

C++

• physenv->SetGravity(Vector &gravityVector) defines gravity for the VPhysics environment, and can be changed at any time.
  Note:Z should be negative for downward pull.
  Tip:Physics objects will sleep on the 'floor' no matter which direction it is in. However, they will not wake simply if gravity changes.
• sv_gravity is used by CGameMovement::AddGravity() to define gravity on players (
  Todo: and NPCs?
  ).