7 changed files with 356 additions and 306 deletions
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2conf.lua
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291data/towers.lua
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1main.lua
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8src/extra.lua
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23src/game.lua
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4src/map-editor.lua
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331src/tower.lua
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--[[ |
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the following is a list of tower specifications, which are declarations of a variety of properties describing what a tower is, and how it functions |
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this a lua file. a quick run-down of what writing code in lua looks like: https://www.amulet.xyz/doc/#lua-primer |
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|
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each tower spec is a lua table. lua tables are the thing that you use to represent bundles of data (both arrays and hashtables are represented by tables) |
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the format of the bundles in our case are described below. |
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some propreties are optional. required properties are marked with an asterisk (*), and are generally included at the top of the list. |
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|
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# TOWER SPEC TABLE |
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| --------------------------| -------- | -------------------------------------------------------------- | |
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| property name, required* | datatype | general description / details | |
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| --------------------------| -------- | -------------------------------------------------------------- | |
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| name* | string | exact one-line display name text of the tower | |
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| placement_rules_text* | string | one-line description of the placement rules for this tower | |
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| short_description* | string | one-line description of the nature of this tower | |
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| texture* | userdata | @TODO | |
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| icon_texture* | userdata | @TODO | |
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| cost* | number | the starting cost of placing this tower | |
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| | | | |
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| weapons* | table | an array of weapons. | |
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| | | order matters - two weapons share a 'choke' value, and both | |
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| | | could acquire a target in a frame, the first one is choosen. | |
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| | | | |
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| placement_rules | table | @TODO | |
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| | | | |
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| | | | |
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| | | | |
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| | | | |
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| | | | |
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| | | | |
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| update_f | function | default value is complicated @TODO | |
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| grow_f | function | default value is false/nil. @TODO | |
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| size | number | default value of 1, which means the tower occupies one hex. | |
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| height | number | default value of 1. height is relevant for mob pathing and | |
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| | | projectile collision | |
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| | | | |
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| --------------------------| -------- | -------------------------------------------------------------- | |
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|
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# WEAPON TABLE |
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| --------------------------| -------- | -------------------------------------------------------------- | |
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| property name, required* | datatype | general description / details | |
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| --------------------------| -------- | -------------------------------------------------------------- | |
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| type | number | sometimes, instead of specifying everything for a weapon, it's | |
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| | | convenient to refer to a base type. if this is provided all of | |
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| | | the weapon's other fields will be initialized to preset values | |
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| | | and any other values you provide with the weapon spec will | |
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| | | overwrite those preset values. | |
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| | | if you provide a value here, all other properties become | |
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| | | optional. | |
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| | | values you can provide, and what they mean: | |
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| | | @TODO | |
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| | | | |
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| fire_rate* | number | 'shots' per second, if the weapon has a valid target | |
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| range* | number | max distance (in hexes) at which this weapon acquires targets | |
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| | | | |
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| min-range | number | default of 0. min distance (in hexes) at which this weapon acquires targets | |
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| target_acquisition_f | function | default value is complicated @TODO | |
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| choke | number | default of false/nil. @TODO | |
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| | | | |
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| --------------------------| -------- | -------------------------------------------------------------- | |
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]] |
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return { |
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{ |
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name = "Wall", |
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placement_rules_text = "Place on Ground", |
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short_description = "Restricts movement, similar to a mountain.", |
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texture = TEXTURES.TOWER_WALL, |
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icon_texture = TEXTURES.TOWER_WALL_ICON, |
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cost = 10, |
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range = 0, |
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fire_rate = 2, |
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update = false, |
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placement_rules = { |
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} |
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}, |
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{ |
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name = "Gattler", |
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placement_rules_text = "Place on Ground", |
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short_description = "Short-range, fast-fire rate single-target tower.", |
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texture = TEXTURES.TOWER_GATTLER, |
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icon_texture = TEXTURES.TOWER_GATTLER_ICON, |
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cost = 20, |
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range = 4, |
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fire_rate = 0.5, |
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update = function(tower, tower_index) |
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if not tower.target_index then |
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-- we should try and acquire a target |
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for index,mob in pairs(game_state.mobs) do |
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if mob then |
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local d = math.distance(mob.hex, tower.hex) |
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if d <= tower.range then |
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tower.target_index = index |
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break |
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end |
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end |
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end |
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|
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-- passive animation |
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tower.node("rotate").angle = math.wrapf(tower.node("rotate").angle + 0.1 * am.delta_time, math.pi*2) |
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else |
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-- should have a target, so we should try and shoot it |
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if not game_state.mobs[tower.target_index] then |
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-- the target we have was invalidated |
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tower.target_index = false |
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else |
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-- the target we have is valid |
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local mob = game_state.mobs[tower.target_index] |
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local vector = math.normalize(mob.position - tower.position) |
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|
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if (game_state.time - tower.last_shot_time) > tower.fire_rate then |
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local projectile = make_and_register_projectile( |
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tower.hex, |
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PROJECTILE_TYPE.BULLET, |
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vector |
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) |
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|
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tower.last_shot_time = game_state.time |
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play_sfx(SOUNDS.HIT1) |
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end |
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|
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-- point the cannon at the dude |
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local theta = math.rad(90) - math.atan((tower.position.y - mob.position.y)/(tower.position.x - mob.position.x)) |
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local diff = tower.node("rotate").angle - theta |
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tower.node("rotate").angle = -theta + math.pi/2 |
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end |
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end |
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end |
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}, |
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{ |
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name = "Howitzer", |
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placement_rules_text = "Place on Ground, with a 1 space gap between other towers and mountains - walls/moats don't count.", |
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short_description = "Medium-range, medium fire-rate area of effect artillery tower.", |
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texture = TEXTURES.TOWER_HOWITZER, |
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icon_texture = TEXTURES.TOWER_HOWITZER_ICON, |
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cost = 50, |
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range = 6, |
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fire_rate = 4, |
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update = function(tower, tower_index) |
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if not tower.target_index then |
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-- we don't have a target |
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for index,mob in pairs(game_state.mobs) do |
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if mob then |
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local d = math.distance(mob.hex, tower.hex) |
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if d <= tower.range then |
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tower.target_index = index |
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break |
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end |
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end |
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end |
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|
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-- passive animation |
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tower.node("rotate").angle = math.wrapf(tower.node("rotate").angle + 0.1 * am.delta_time, math.pi*2) |
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else |
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-- we should have a target |
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-- @NOTE don't compare to false, empty indexes appear on game reload |
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if not game_state.mobs[tower.target_index] then |
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-- the target we have was invalidated |
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tower.target_index = false |
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|
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else |
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-- the target we have is valid |
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local mob = game_state.mobs[tower.target_index] |
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local vector = math.normalize(mob.position - tower.position) |
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|
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if (game_state.time - tower.last_shot_time) > tower.fire_rate then |
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local projectile = make_and_register_projectile( |
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tower.hex, |
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PROJECTILE_TYPE.SHELL, |
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vector |
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) |
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|
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-- @HACK, the projectile will explode if it encounters something taller than it, |
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-- but the tower it spawns on quickly becomes taller than it, so we just pad it |
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-- if it's not enough the shell explodes before it leaves its spawning hex |
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projectile.props.z = tower.props.z + 0.1 |
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tower.last_shot_time = game_state.time |
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play_sfx(SOUNDS.EXPLOSION2) |
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end |
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|
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-- point the cannon at the dude |
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local theta = math.rad(90) - math.atan((tower.position.y - mob.position.y)/(tower.position.x - mob.position.x)) |
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local diff = tower.node("rotate").angle - theta |
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tower.node("rotate").angle = -theta + math.pi/2 |
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end |
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end |
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end |
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}, |
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{ |
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name = "Redeye", |
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placement_rules_text = "Place on Mountains.", |
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short_description = "Long-range, penetrating high-velocity laser tower.", |
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texture = TEXTURES.TOWER_REDEYE, |
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icon_texture = TEXTURES.TOWER_REDEYE_ICON, |
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cost = 75, |
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range = 9, |
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fire_rate = 3, |
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update = function(tower, tower_index) |
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if not tower.target_index then |
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for index,mob in pairs(game_state.mobs) do |
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if mob then |
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local d = math.distance(mob.hex, tower.hex) |
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if d <= tower.range then |
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tower.target_index = index |
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break |
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end |
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end |
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end |
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else |
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if not game_state.mobs[tower.target_index] then |
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tower.target_index = false |
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|
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elseif (game_state.time - tower.last_shot_time) > tower.fire_rate then |
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local mob = game_state.mobs[tower.target_index] |
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make_and_register_projectile( |
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tower.hex, |
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PROJECTILE_TYPE.LASER, |
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math.normalize(mob.position - tower.position) |
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) |
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tower.last_shot_time = game_state.time |
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vplay_sfx(SOUNDS.LASER2) |
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end |
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end |
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end |
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}, |
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{ |
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name = "Moat", |
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placement_rules_text = "Place on Ground", |
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short_description = "Restricts movement, similar to water.", |
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texture = TEXTURES.TOWER_MOAT, |
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icon_texture = TEXTURES.TOWER_MOAT_ICON, |
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cost = 10, |
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range = 0, |
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fire_rate = 2, |
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height = -1, |
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update = false |
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}, |
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{ |
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name = "Radar", |
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placement_rules_text = "n/a", |
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short_description = "Doesn't do anything right now :(", |
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texture = TEXTURES.TOWER_RADAR, |
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icon_texture = TEXTURES.TOWER_RADAR_ICON, |
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cost = 100, |
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range = 0, |
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fire_rate = 1, |
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update = false |
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}, |
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{ |
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name = "Lighthouse", |
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placement_rules_text = "Place on Ground, adjacent to Water or Moats", |
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short_description = "Attracts nearby mobs; temporarily redirects their path", |
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texture = TEXTURES.TOWER_LIGHTHOUSE, |
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icon_texture = TEXTURES.TOWER_LIGHTHOUSE_ICON, |
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cost = 150, |
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range = 7, |
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fire_rate = 1, |
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target_aquisition_f = function(tower, tower_index) |
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|
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end, |
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update = function(tower, tower_index) |
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-- check if there's a mob on a hex in our perimeter |
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for _,h in pairs(tower.perimeter) do |
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local mobs = mobs_on_hex(h) |
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for _,m in pairs(mobs) do |
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if not m.path and not m.seen_lighthouse then |
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-- @TODO only attract the mob if its frame target (direction vector) |
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-- is within some angle range...? if the mob is heading directly away from the tower, then |
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-- the lighthouse shouldn't do much |
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local path, made_it = hex_Astar(game_state.map, tower.hex, m.hex, grid_neighbours, grid_cost, grid_heuristic) |
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if made_it then |
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m.path = path |
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m.seen_lighthouse = true -- right now mobs don't care about lighthouses if they've already seen one. |
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end |
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end |
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end |
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end |
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end |
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}, |
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} |
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