Martian: Difference between revisions

The martian is a [[respawning monster]]. There are two different types of martians: normal and top of screen.

== Behavior ==

=== Normal martian ===

[[File:MartianAreas.png|thumb|256px|Normal martian behavior areas.<br />'''Red:''' move away<br />'''Yellow:''' Line up<br />'''Pink:''' Move towards<br />'''Blue:''' Keep previous direction<br />'''Outside all colors:''' Despawn<br />Light area in center is the size of the screen]]

Normal martians will try to stay about 70 pixels away from a target, while lining themselves up for a shot on the target. However, the relatively large amount of time between direction updates means that they generally just dart around diagonally in the vicinity of the target.

* Every frame, attempt to shoot at a player or victim if there is one within 8 pixels of the martian on a single axis. Every 61 attempts, a shot will actually be fired.

** When a shot is fired, stand in place for 12 frames.

* Every 61 frames (about once per second) update the movement direction:

** If the nearest target is less than 60 pixels away, move away from the target.

** If the nearest target is between 60 and 79 pixels away, move in the direction of the shortest distance to line up with the target on a single axis.

** If the nearest target is between 80 and 223 pixels away, move towards the target.

** If none of the above is true and there is no player within 207 pixels on a single axis, then despawn.

* Move in the current direction at a speed of 1.5 px/frame.

Note that martians will target [[decoys]], but they will not attempt to shoot at them.

=== Top of screen martian ===

Top of screen martians will move side to side above a target, trying to maintain about 108 pixels of space vertically. Upon spawning, they will set their Y position to 8 pixels below the top of the screen.

* If there is no player within 207 pixels on a single axis, despawn.

* If there is a player above the martian, convert into a normal martian.

* Every frame, attempt to shoot at a player or victim if there is one within 8 pixels of the martian on a single axis. Every 61 attempts, a shot will actually be fired.

** If a shot was not attempted in this way, randomly attempt to shoot down with probability 30/256 (about 11.72%).

** When a shot is fired, stand in place for 12 frames.

* Every 33 frames, update horizontal movement direction:

** If the nearest target is less than 20 pixels away, move away from the target.

** If the nearest target is 20 pixels or more away, move towards the target.

* Move based on the current horizontal movement direction:

** If the nearest target is less than 96 pixels below the martian, move up-left or up-right at a speed of 3 px/frame.

** If the nearest target is between 96 and 119 pixels below the martian, move left or right at a speed of 1.5 px/frame.

** If the nearest target is 120 pixels or more below the martian, move down-left or down-right at a speed of 3 px/frame.