Vertical entity movement

Analysis is based on the decompiled source of the vanilla b1.7.3 client.

Terms

Velocity will refer to the vertical velocity of a player in meters (blocks) per tick. This should be added to the player's position at a specific time during each tick, after certain processes and before others

Processes

Gravity in Air

Gravity in air is -0.08 meters per tick squared. This should be added before air friction is applied.

Air friction

Air friction is calculated each tick by multiplying the player's current vertical motion by 0.98.