code/__DEFINES/movement.dm

MIN_GLIDE_SIZE	The minimum for glide_size to be clamped to.
MAX_GLIDE_SIZE	The maximum for glide_size to be clamped to. This shouldn't be higher than the icon size, and generally you shouldn't be changing this, but it's here just in case.
DELAY_TO_GLIDE_SIZE	Broken down, here's what this does: divides the world icon_size (32) by delay divided by ticklag to get the number of pixels something should be moving each tick. The division result is given a min value of 1 to prevent obscenely slow glide sizes from being set Then that's multiplied by the global glide size multiplier. 1.25 by default feels pretty close to spot on. This is just to try to get byond to behave. The whole result is then clamped to within the range above. Not very readable but it works
MOVEMENT_ADJUSTED_GLIDE_SIZE	Similar to DELAY_TO_GLIDE_SIZE, except without the clamping, and it supports piping in an unrelated scalar
MOVEMENT_DEFAULT_PRIORITY	Standard, go lower then this if you want to override, higher otherwise
MOVEMENT_SPACE_PRIORITY	Very few things should override this
MOVEMENT_ABOVE_SPACE_PRIORITY	Higher then the heavens
MOVEMENT_LOOP_START_FAST	Should the loop act immediately following its addition?
MOVEMENT_LOOP_IGNORE_PRIORITY	Do we not use the priority system?
MOVEMENT_LOOP_IGNORE_GLIDE	Should we override the loop's glide?
MOVEMENT_LOOP_NO_DIR_UPDATE	Should we not update our movables dir on move?
MOVEMENT_LOOP_OUTSIDE_CONTROL	Is the loop moving the movable outside its control, like it's an external force? e.g. footsteps won't play if enabled.
MOVELOOP_STATUS_PAUSED	Has the loop been paused, soon to be resumed?
MOVELOOP_STATUS_RUNNING	Is the loop running? (Is true even when paused)
MOVELOOP_STATUS_QUEUED	Is the loop queued in a subsystem?
CHECK_MOVE_LOOP_FLAGS	Returns a bitfield containing flags both present in `flags` arg and the `processing_move_loop_flags` move_packet variable. Has no use outside of procs called within the movement proc chain.
CURRENTLY_Z_FALLING	currently_z_moving defines. Higher numbers mean higher priority. This one is for falling down open space from stuff such as deleted tile, pit grate...
CURRENTLY_Z_MOVING_GENERIC	currently_z_moving is set to this in zMove() if 0.
CURRENTLY_Z_FALLING_FROM_MOVE	This one is for falling down open space from movement.
CURRENTLY_Z_ASCENDING	This one is for going upstairs.
FALL_INTERCEPTED	possible bitflag return values of [atom/proc/intercept_zImpact] calls Stops the movable from falling further and crashing on the ground. Example: stairs.
FALL_NO_MESSAGE	Suppresses the "[movable] falls through [old_turf]" message because it'd make little sense in certain contexts like climbing stairs.
FALL_STOP_INTERCEPTING	Used when the whole intercept_zImpact forvar loop should be stopped. For example: when someone falls into the supermatter and becomes dust.
FALL_RETAIN_PULL	Used when the grip on a pulled object shouldn't be broken.
ZMOVE_CHECK_PULLING	Runs recheck_grabs() by the end of [/atom/movable/proc/zMove] for every movable that's pulling something. Should be kept enabled unless you know what you are doing.
ZMOVE_CHECK_PULLEDBY	Checks if pulledby is nearby. if not, stop being pulled.
ZMOVE_FALL_CHECKS	flags for different checks done in /atom/movable/proc/can_z_move. Should be self-explainatory.
ZMOVE_IGNORE_OBSTACLES	Doesn't call CanZPass()
ZMOVE_FEEDBACK	Gives players chat feedbacks if they're unable to move through z levels.
ZMOVE_ALLOW_BUCKLED	Whether we check the movable (if it exists) the living mob is buckled on or not.
ZMOVE_INCLUDE_PULLED	Includes movables that're either pulled by the source or mobs buckled to it in the list of moving movables.
ZMOVE_ALLOW_ANCHORED	Skips check for whether the moving atom is anchored or not.
ZMOVE_SKIP_CANMOVEONTO	Skip CanMoveOnto() checks
ZMOVE_FLIGHT_FLAGS	Flags used in "Move Upwards" and "Move Downwards" verbs.
ZMOVE_STAIRS_FLAGS	Used when walking upstairs
ZMOVE_FALL_FLAGS	Used for falling down open space.
FIRST_DIAG_STEP	The first step of the diagnonal movement
SECOND_DIAG_STEP	The second step of the diagnonal movement
TELEPORT_CHANNEL_BLUESPACE	Classic bluespace teleportation, requires a sender but no receiver
TELEPORT_CHANNEL_QUANTUM	Quantum-based teleportation, requires both sender and receiver, but is free from normal disruption
TELEPORT_CHANNEL_WORMHOLE	Wormhole teleportation, is not disrupted by bluespace fluctuations but tends to be very random or unsafe
TELEPORT_CHANNEL_MAGIC	Magic teleportation, does whatever it wants (unless there's antimagic)
TELEPORT_CHANNEL_CULT	Cult teleportation, does whatever it wants (unless there's holiness)
TELEPORT_CHANNEL_FREE	Anything else
MOVELOOP_FAILURE	Return values for moveloop Move()

Define Details

#define
CHECK_MOVE_LOOP_FLAGS
(movable, flags)

Returns a bitfield containing flags both present in flags arg and the processing_move_loop_flags move_packet variable. Has no use outside of procs called within the movement proc chain.

#define
CURRENTLY_Z_ASCENDING

This one is for going upstairs.

#define
CURRENTLY_Z_FALLING

currently_z_moving defines. Higher numbers mean higher priority. This one is for falling down open space from stuff such as deleted tile, pit grate...

#define
CURRENTLY_Z_FALLING_FROM_MOVE

This one is for falling down open space from movement.

#define
CURRENTLY_Z_MOVING_GENERIC

currently_z_moving is set to this in zMove() if 0.

#define
DELAY_TO_GLIDE_SIZE
(delay)

Broken down, here's what this does: divides the world icon_size (32) by delay divided by ticklag to get the number of pixels something should be moving each tick. The division result is given a min value of 1 to prevent obscenely slow glide sizes from being set Then that's multiplied by the global glide size multiplier. 1.25 by default feels pretty close to spot on. This is just to try to get byond to behave. The whole result is then clamped to within the range above. Not very readable but it works

#define
FALL_INTERCEPTED

possible bitflag return values of [atom/proc/intercept_zImpact] calls Stops the movable from falling further and crashing on the ground. Example: stairs.

#define
FALL_NO_MESSAGE

Suppresses the "[movable] falls through [old_turf]" message because it'd make little sense in certain contexts like climbing stairs.

#define
FALL_RETAIN_PULL

Used when the grip on a pulled object shouldn't be broken.

#define
FALL_STOP_INTERCEPTING

Used when the whole intercept_zImpact forvar loop should be stopped. For example: when someone falls into the supermatter and becomes dust.

#define
FIRST_DIAG_STEP

The first step of the diagnonal movement

#define
MAX_GLIDE_SIZE

The maximum for glide_size to be clamped to. This shouldn't be higher than the icon size, and generally you shouldn't be changing this, but it's here just in case.

#define
MIN_GLIDE_SIZE

The minimum for glide_size to be clamped to.

#define
MOVELOOP_FAILURE

Return values for moveloop Move()

#define
MOVELOOP_STATUS_PAUSED

Has the loop been paused, soon to be resumed?

#define
MOVELOOP_STATUS_QUEUED

Is the loop queued in a subsystem?

#define
MOVELOOP_STATUS_RUNNING

Is the loop running? (Is true even when paused)

#define
MOVEMENT_ABOVE_SPACE_PRIORITY

Higher then the heavens

#define
MOVEMENT_ADJUSTED_GLIDE_SIZE
(delay, movement_disparity)

Similar to DELAY_TO_GLIDE_SIZE, except without the clamping, and it supports piping in an unrelated scalar

#define
MOVEMENT_DEFAULT_PRIORITY

Standard, go lower then this if you want to override, higher otherwise

#define
MOVEMENT_LOOP_IGNORE_GLIDE

Should we override the loop's glide?

#define
MOVEMENT_LOOP_IGNORE_PRIORITY

Do we not use the priority system?

#define
MOVEMENT_LOOP_NO_DIR_UPDATE

Should we not update our movables dir on move?

#define
MOVEMENT_LOOP_OUTSIDE_CONTROL

Is the loop moving the movable outside its control, like it's an external force? e.g. footsteps won't play if enabled.

#define
MOVEMENT_LOOP_START_FAST

Should the loop act immediately following its addition?

#define
MOVEMENT_SPACE_PRIORITY

Very few things should override this

#define
SECOND_DIAG_STEP

The second step of the diagnonal movement

#define
TELEPORT_CHANNEL_BLUESPACE

Classic bluespace teleportation, requires a sender but no receiver

#define
TELEPORT_CHANNEL_CULT

Cult teleportation, does whatever it wants (unless there's holiness)

#define
TELEPORT_CHANNEL_FREE

Anything else

#define
TELEPORT_CHANNEL_MAGIC

Magic teleportation, does whatever it wants (unless there's antimagic)

#define
TELEPORT_CHANNEL_QUANTUM

Quantum-based teleportation, requires both sender and receiver, but is free from normal disruption

#define
TELEPORT_CHANNEL_WORMHOLE

Wormhole teleportation, is not disrupted by bluespace fluctuations but tends to be very random or unsafe

#define
ZMOVE_ALLOW_ANCHORED

Skips check for whether the moving atom is anchored or not.

#define
ZMOVE_ALLOW_BUCKLED

Whether we check the movable (if it exists) the living mob is buckled on or not.

#define
ZMOVE_CHECK_PULLEDBY

Checks if pulledby is nearby. if not, stop being pulled.

#define
ZMOVE_CHECK_PULLING

Runs recheck_grabs() by the end of [/atom/movable/proc/zMove] for every movable that's pulling something. Should be kept enabled unless you know what you are doing.

#define
ZMOVE_FALL_CHECKS

flags for different checks done in /atom/movable/proc/can_z_move. Should be self-explainatory.

#define
ZMOVE_FALL_FLAGS

Used for falling down open space.

#define
ZMOVE_FEEDBACK

Gives players chat feedbacks if they're unable to move through z levels.

#define
ZMOVE_FLIGHT_FLAGS

Flags used in "Move Upwards" and "Move Downwards" verbs.

#define
ZMOVE_IGNORE_OBSTACLES

Doesn't call CanZPass()

#define
ZMOVE_INCLUDE_PULLED

Includes movables that're either pulled by the source or mobs buckled to it in the list of moving movables.

#define
ZMOVE_SKIP_CANMOVEONTO

Skip CanMoveOnto() checks

#define
ZMOVE_STAIRS_FLAGS

Used when walking upstairs

code/__DEFINES/movement.dm

Define Details

#define CHECK_MOVE_LOOP_FLAGS (movable, flags)

#define CURRENTLY_Z_ASCENDING

#define CURRENTLY_Z_FALLING

#define CURRENTLY_Z_FALLING_FROM_MOVE

#define CURRENTLY_Z_MOVING_GENERIC

#define DELAY_TO_GLIDE_SIZE (delay)

#define FALL_INTERCEPTED

#define FALL_NO_MESSAGE

#define FALL_RETAIN_PULL

#define FALL_STOP_INTERCEPTING

#define FIRST_DIAG_STEP

#define MAX_GLIDE_SIZE

#define MIN_GLIDE_SIZE

#define MOVELOOP_FAILURE

#define MOVELOOP_STATUS_PAUSED

#define MOVELOOP_STATUS_QUEUED

#define MOVELOOP_STATUS_RUNNING

#define MOVEMENT_ABOVE_SPACE_PRIORITY

#define MOVEMENT_ADJUSTED_GLIDE_SIZE (delay, movement_disparity)

#define MOVEMENT_DEFAULT_PRIORITY

#define MOVEMENT_LOOP_IGNORE_GLIDE

#define MOVEMENT_LOOP_IGNORE_PRIORITY

#define MOVEMENT_LOOP_NO_DIR_UPDATE

#define MOVEMENT_LOOP_OUTSIDE_CONTROL

#define MOVEMENT_LOOP_START_FAST

#define MOVEMENT_SPACE_PRIORITY

#define SECOND_DIAG_STEP

#define TELEPORT_CHANNEL_BLUESPACE

#define TELEPORT_CHANNEL_CULT

#define TELEPORT_CHANNEL_FREE

#define TELEPORT_CHANNEL_MAGIC

#define TELEPORT_CHANNEL_QUANTUM

#define TELEPORT_CHANNEL_WORMHOLE

#define ZMOVE_ALLOW_ANCHORED

#define ZMOVE_ALLOW_BUCKLED

#define ZMOVE_CHECK_PULLEDBY

#define ZMOVE_CHECK_PULLING

#define ZMOVE_FALL_CHECKS

#define ZMOVE_FALL_FLAGS

#define ZMOVE_FEEDBACK

#define ZMOVE_FLIGHT_FLAGS

#define ZMOVE_IGNORE_OBSTACLES

#define ZMOVE_INCLUDE_PULLED

#define ZMOVE_SKIP_CANMOVEONTO

#define ZMOVE_STAIRS_FLAGS