FSM
FSM or Finite State Machine allows you to extend sprites animation and entities behavior on general. It is a set of lines that describe what sprites enemy or decorations will have and what will they do. In short, you can change how many sprites an entity has and how fast frames will switch one another.
To add a state machine, you need to create a file with the .states extension and the name of the weapon, enemy, or decoration in the ProjectName/States folder. When adding a state machine, the attack and reload speed will no longer depend on the setting in the editor - everything will be controlled only by the duration of the frames specified in the file. In addition, all sprites and (for weapons) some of the sounds will need to be loaded manually using the image and sound commands.
Best practices
Never have a space or tab Infront of any string. (White space is also counted when the engine reads the FSM/Script or script and unexpected spaces will break the FSM/Script
image Decoration 0 3 - loads sprites and adds them to a list. They are numbered from 0. In this case this command will load every sprite from "Decoration0" to "Decoration3". Sprites must be placed in Data/Sprites/ with apropriate entity folder (Decorations or Enemies) or weapons(Weapons). e.g. "Data/Sprites/Decorations". Weapon sprites MUST have frame 0 which is used for sprites on the floor.
image Decoration - will load only one sprite (in this case named "Decoration") and add it to a list.
sound WeaponFire - will load a sound and add it to a list. They are numbered from 0. Sounds must be placed in Data/Sounds.
state IDLE NONE 0 - creates a new state, where IDLE is a name, NONE - name of the next state to jump to after this one is done (if it's NONE, current state will be looped), 0 (или 1) - sets if you want this state to interpolate model frames or not (if you use 3D models).
frame 0 0.25 0 0 0 NONE - adds a frame to the latest created state. Here 0 - number of a sprite that was loaded (see earlier), 0.25 - time this frame will be staying on screen, 0 0 0 - offset coordinates (only for weapons), NONE - action (see further down).
States shown in examples are MANDATORY to create. There might be many other states, however enemies will only move while in CHASE state. Enemy will spawn blood when in state HURT.
There's also an additional state for weapons called ALTATTACK and can be used to use your weapon with right mouse button.
Actions:
NONE
empty. Does nothing.
ATTACK
weapon or enemy attack
READY
sets if entity is ready to attack. Mandatory after enemy or weapon attack FLEE sets a flee state for the enemy that makes them run away
HURT
sets a hurt state for the enemy. This can work with the FLEE state for example, HURT FLEE will set the enemy to flee after taking damage for a short time.
SOUND 0
plays a sound, 0
number of a loaded sound (see earlier)
SOUNDANDATTACK 0
does attack and plays sound in one action.
SETVAR name value
sets variable to a certain value. You can use RANDOM(0,100) instead of value. The value will be randomized from 0 to 100. You can also use global. and map. prefixes to set global or map variables (see Scripting). value can be set to LASTDAMAGE, HP or MAXHP to retrieve the last amount of damage the entity received, its current hp, or its max hp.
CLAMP var min max
confines the variable 'var' between min and max. Sets var to min if its below min, sets var to max if its above max.
INCREMENT name value
increments the value of a variable, i.e. increases by 1.
DECREMENT name value
decrements the value of a variable, i.e. decreases by 1.
JUMPIFEQUALS variable value state
moves to another state if variable value equal to the one we want. You can also use global. and map. prefixes.
JUMPIFNEQUALS variable value state
moves to another state if variable value is not equal to the one we want. You can also use global. and map. prefixes.
JUMPIFGEQUALS variable value state
moves to another state if variable value equal or greater to the one we want. You can also use global. and map. prefixes.
JUMPIFLEQUALS variable value state
moves to another state if variable value equal or less to the one we want. You can also use global. and map. prefixes.
JUMPIFGREATER variable value state
moves to another state if variable value greater to the one we want. You can also use global. and map. prefixes.
JUMPIFLESS variable value state
moves to another state if variable value less to the one we want. You can also use global. and map. prefixes.
JUMPIFLESSAMMO state
moves to another value if ammo in magazine is lower than maximum (weapons only).
JUMPIFNOAMMO state
moves to another state if magazine is empty (weapons only).
GIVEAMMO
gives 1 ammo to a magazine. (weapons only).
TAKEAMMO
takes one ammo from magazine (weapons only).
RELOAD
reloads magazine (weapons only).
MUZZLEFLASH
shows muzzle flash (weapons only).
PARTICLES imageindex i,l,x,y,z dx,dy,dz - creates particles. imageindex
number of sprite loaded, i - number of particles, l - particle lifetime, x,y,z - coordinates. Coordinates are local to enemy or player, meaning that 0,0,1 will always be in front of enemy or player. x - side offset, y - vertical offset, z - forward offset. dx,dy,dz - particle velocity. Also local to entity.
CUSTOMPARTICLE id lifetime x,y,z dx,dy,dz scale gravity
creates one custom particle. id - which particle image to use (shared between all entities, loaded from "Particles\CustomX.png", X is the particleID), lifetime and xyz are the same as in PARTICLES. dx,dy,dz are always exact values, and will not be randomised. scale affects the particle size. gravity is the fall strength. Any value can be replaced with a variable
EXPLOSION name radius
creates an explosion with a name and radius where name is name of explosion sprites. Sprites must be place in Data/Sprites/Effects (enemies only).
SPAWN name x,y,z f,v
creates an entity with a name (enemies and decoration) or a keyword (Key1, Key2, Key3, Hp1, Hp2, Hp3, Hp4, Ammo1, Ammo2, Ammo3... etc.). x,y,z - just like with particles, f - front velocity when spawned, v - vertical velocity when spawning. (enemies and decorations only).
PLAYERSPEED
controls player's movement. You can only entirely freeze the movement (if set to 0) and enable it back (if set to 1), or double it (if set to 2).
All key words are CASE SENSITIVE Also be wary of whitespaces, they are important for engine to correctly parse parameters. Only Latin characters are allowed.
Basic FSM for a weapon:
image Weapon 0 7
sound WeaponFire
sound WeaponReload
state IDLE NONE 0
frame 1 0.25 0 0 0 NONE
frame 1 0.25 0 0 0 READY
state ATTACK IDLE 0
frame 2 1 0 0 0 NONE
frame 3 1 0 0 0 SOUNDANDATTACK 0
frame 4 1 0 0 0 MUZZLEFLASH
frame 5 1 0 0 0 READY
frame 6 1 0 0 0 NONE
frame 7 1 0 0 0 NONE
frame 1 0.25 0 0 0 NONE
frame 1 0.25 0 0 0 NONE
state RELOAD IDLE 0
frame 1 0 0 0 0 NONE
frame 1 0.1 0 0 0 NONE
frame 1 0.1 0 200 0 NONE
frame 1 0.1 0 200 0 RELOAD
frame 1 0.1 0 0 0 SOUND 1
Basic FSM for alt attack:
state ALTATTACK IDLE 0
frame 1 0 0 0 NONE
frame 2 0 0 0 SOUNDATTACK 0 (plays the attack sound)
frame 3 0 0 0 MUZZLEFLASH (Sets the muzzel flash)
frameset 4 28 0 0 0 NONE (This plays frames 4 through to 28 so that you don't have to write out each line)
frame 29 0 0 0 ATTACK (sets the attack)
frame 30 0 0 0 READY
Basic FSM for enemies:
image Enemy 0 12
state IDLE NONE 0
frame 0 0.125 0 0 0 NONE
frame 0 0.125 0 0 0 READY
state SEE CHASE 0
frame 0 0.125 0 0 0 NONE
frame 0 0.125 0 0 0 READY
state CHASE NONE 0
frame 1 1 0 0 0 NONE
frame 2 1 0 0 0 NONE
frame 3 1 0 0 0 NONE
frame 4 1 0 0 0 READY
state ATTACK CHASE 0
frame 5 0.25 0 0 0 NONE
frame 5 0.25 0 0 0 NONE
frame 6 0.0625 0 0 0 NONE
frame 6 0.0625 0 0 0 ATTACK
frame 5 0.25 0 0 0 NONE
frame 5 0.25 0 0 0 READY
state HURT CHASE 0
frame 7 0.125 0 0 0 NONE
frame 8 0.125 0 0 0 NONE
state DEATH DEAD 0
frame 9 0.166 0 0 0 NONE
frame 10 0.166 0 0 0 NONE
frame 11 0.166 0 0 0 NONE
state DEAD NONE 0
frame 12 0.125 0 0 0 NONE
frame 12 0.125 0 0 0 NONE
Intermediate FSM for enemies:
image BORIS 0 455
sound AK
state IDLE NONE 0
frameset 2 254 0.025 0 0 0 NONE
frame 255 0.025 0 0 0 NONE
frame 256 0.025 0 0 0 READY
state SEE CHASE 0
frameset 262 281 0.025 0 0 0 NONE
frame 282 0.025 0 0 0 NONE
frame 283 0.025 0 0 0 READY
state CHASE SEE 0
frameset 262 281 0.025 0 0 0 NONE
frame 282 0.025 0 0 0 NONE
frame 283 0.025 0 0 0 READY
state ATTACK CHASE 0
frame 463 0.025 0 0 0 NONE
frame 464 0.025 0 0 0 SOUNDANDATTACK 0
frameset 465 496 0.025 0 0 0 NONE
frame 497 0.025 0 0 0 READY
state HURT FLEE 0
frameset 286 340 0.025 0 0 0 NONE
frame 341 0.025 0 0 0 NONE
frame 342 0.025 0 0 0 READY
state FLEE SEE 0
frameset 262 281 0.025 0 0 0 NONE
frame 282 0.025 0 0 0 NONE
frame 283 0.025 0 0 0 READY
state SEE FLEE 0
frameset 262 281 0.025 0 0 0 NONE
frame 282 0.025 0 0 0 NONE
frame 283 0.025 0 0 0 READY
state FLEE CHASE 0
frameset 262 281 0.025 0 0 0 NONE
frame 282 0.025 0 0 0 NONE
frame 283 0.025 0 0 0 READY
state DEATH DEAD 0
frameset 357 453 0.025 0 0 0 NONE
frame 454 0.025 0 0 0 NONE
frame 455 0.025 0 0 0 NONE
state DEAD NONE 0
frame 455 0.025 0 0 0 NONE
Basic FSM for decorations:
image Decoration 0 3
state IDLE NONE 0
frame 0 0.25 0 0 0 NONE
frame 0 0.25 0 0 0 READY
state DEATH DEAD 0
frame 1 0.166 0 0 0 NONE
frame 2 0.166 0 0 0 NONE
frame 3 0.166 0 0 0 NONE
state DEAD NONE 0
frame 3 0.25 0 0 0 NONE
frame 3 0.25 0 0 0 NONE
Basic FSM for ALT fire:
image ColtNavy 0 12
sound ColtNavyFire
sound ColtNavyReload
state IDLE NONE 0
frame 1 0.1 0 0 0 NONE
frame 1 0.1 0 0 0 READY
state ATTACK IDLE 0
frame 2 0.10 0 0 0 NONE
frame 3 0.10 0 0 0 NONE
frame 4 0.10 0 0 0 SOUNDANDATTACK 0
frame 5 0.10 0 0 0 MUZZLEFLASH
frame 6 0.10 0 0 0 NONE
frame 7 0.10 0 0 0 READY
state ALTATTACK IDLE 0
frame 8 0.04 0 0 0 NONE
frame 8 0.04 0 0 0 JUMPIFNOAMMO IDLE
frame 8 0.04 0 0 0 READY
frame 9 0.04 0 0 0 SOUNDANDATTACK 0
frame 10 0.04 0 0 0 MUZZLEFLASH
frame 10 0.04 0 0 0 JUMPIFNOAMMO IDLE
frame 11 0.04 0 0 0 READY
frame 9 0.04 0 0 0 SOUNDANDATTACK 0
frame 10 0.04 0 0 0 MUZZLEFLASH
frame 10 0.04 0 0 0 JUMPIFNOAMMO IDLE
frame 11 0.04 0 0 0 READY
frame 11 0.04 0 0 0 SOUNDANDATTACK 0
frame 10 0.04 0 0 0 MUZZLEFLASH
frame 9 0.04 0 0 0 NONE
frame 8 0.04 0 0 0 READY
state RELOAD IDLE 0
frame 1 0 0 0 0 NONE
frame 1 0.1 0 0 0 SOUND 1
frame 1 0.1 0 200 0 NONE
frame 1 0.1 0 200 0 RELOAD