Turn spawners into entities driven by the spawnerSystem.

src/effects.lua

@@ -1,10 +1,28 @@
+effectSystem = filteredSystem({ canReceive })
+
 Effects = {}
 
 ---@param entity { canBeBounced: CanBeBounced }
 function Effects.makeBouncier(entity)
     entity.canBeBounced.mult = entity.canBeBounced.mult * 1.5
 end
+
 ---@param entity { mass: number }
 function Effects.makeFloatier(entity)
     entity.mass = entity.mass * 0.75
 end
+
+--- Cause the given ingredient to spawn more frequently
+function Effects.moreOfIngredient(ingredient, spawner)
+
+end
+
+--- Each of the given ingredient will have a *mult score from now on.
+function Effects.multiplyIngredientValue(ingredient, mult, spawner)
+
+end
+
+--- Each ingredient *multiplies* score in some way, in addition to adding.
+function Effects.multiplicativeIngredientValue(ingredient, addedMult, spawner)
+
+end

src/ingredients/cheese.lua

@@ -1,24 +0,0 @@
-Cheese = {}
-
-local sizeX, sizeY = CheeseSprite:getSize()
-local size = { x = sizeX, y = sizeY }
-local expireWhenOffScreenBy = { x = 2000, y = 480 }
-
-local canBounce = {
-    flat = { x = 50, y = 390 },
-    mult = { x = 0.7, y = -0.5 },
-}
-
-function Cheese.initialize(o, x, y)
-    o.score = 5
-    o.canBeCollidedBy = 1
-    o.expireAfterCollision = true
-    o.size = size
-    o.position = { x = x, y = y }
-    o.drawAsSprite = CheeseSprite
-    o.collectable = o.drawAsSprite
-    o.expireWhenOffScreenBy = expireWhenOffScreenBy
-    o.canBounce = canBounce
-    newestBooster = o
-    return newestBooster
-end

src/ingredients/ingredients.lua

@@ -1,8 +1,3 @@
-import("ingredients/cheese.lua")
-import("ingredients/lettuce.lua")
-import("ingredients/mushroom.lua")
-import("ingredients/tomato.lua")
-
 ---@class
 Ingredients = {}
 
@@ -16,7 +11,7 @@ end
 
 local newestIngredient = {}
 function Ingredients.newestIngredient()
-    assert(newestIngredient.position ~= nil, "All ingredients are implicitly required to have a position component.")
+    -- assert(newestIngredient.position ~= nil, "All ingredients are implicitly required to have a position component.")
     return newestIngredient
 end
 
@@ -24,7 +19,7 @@ function Ingredients.cacheSize()
     return maxCache
 end
 
-function Ingredients.getNext(x, y)
+function Ingredients.nextInCache()
     local index = _ingredientCacheIndex
     _ingredientCacheIndex = _ingredientCacheIndex + 1
     if _ingredientCacheIndex >= maxCache then
@@ -35,16 +30,13 @@ function Ingredients.getNext(x, y)
     for key in pairs(o) do
         o[key] = nil
     end
-    newestIngredient = o
 
-    local odds = math.random()
-    if odds > 0.3 then
-        return Lettuce.initialize(o, x, y)
-    elseif odds > 0.2 then
-        return Tomato.initialize(o, x, y)
-    elseif odds > 0.05 then
-        return Mushroom.initialize(o, x, 218 + math.random(1, 5))
-    else
-        return Cheese.initialize(o, x, y)
-    end
+    newestIngredient = o
+    return o
+end
+
+function Ingredients.getFirst()
+    local ret = Ingredients.nextInCache()
+    ret.position = { x = 0, y = 0 }
+    return ret
 end

src/ingredients/lettuce.lua

@@ -1,24 +0,0 @@
-Lettuce = {}
-
-local sizeX, sizeY = LettuceSprite:getSize()
-local size = { x = sizeX, y = sizeY / 2 }
-local expireWhenOffScreenBy = { x = 2000, y = 480 }
-
-local canBounce = {
-    flat = { x = 22, y = 190 },
-    mult = { x = 1, y = -0.5 },
-}
-
-function Lettuce.initialize(o, x, y)
-    o.score = 1
-    o.canBeCollidedBy = 1
-    o.expireAfterCollision = true
-    o.size = size
-    o.position = { x = x, y = y }
-    o.drawAsSprite = LettuceSprite
-    o.collectable = o.drawAsSprite
-    o.expireWhenOffScreenBy = expireWhenOffScreenBy
-    o.canBounce = canBounce
-    newestBooster = o
-    return newestBooster
-end

src/ingredients/mushroom.lua

@@ -1,24 +0,0 @@
-Mushroom = {}
-
-local sizeX, sizeY = MushroomSprite:getSize()
-local size = { x = sizeX, y = sizeY }
-local expireWhenOffScreenBy = { x = 2000, y = 480 }
-
-local canBounce = {
-    flat = { x = 0, y = 290 },
-    mult = { x = 1, y = -1 },
-}
-
-function Mushroom.initialize(o, x, y)
-    o.score = 5
-    o.canBeCollidedBy = 1
-    o.expireAfterCollision = true
-    o.size = size
-    o.position = { x = x, y = y }
-    o.drawAsSprite = MushroomSprite
-    o.collectable = o.drawAsSprite
-    o.expireWhenOffScreenBy = expireWhenOffScreenBy
-    o.canBounce = canBounce
-    newestBooster = o
-    return newestBooster
-end

src/ingredients/tomato.lua

@@ -1,18 +0,0 @@
-Tomato = {}
-
-local sizeX, sizeY = TomatoSprite:getSize()
-local size = { x = sizeX, y = sizeY }
-local expireWhenOffScreenBy = { x = 2000, y = 480 }
-
-function Tomato.initialize(o, x, y)
-    o.score = 15
-    o.canBeCollidedBy = 1
-    o.expireAfterCollision = true
-    o.size = size
-    o.position = { x = x, y = y }
-    o.drawAsSprite = TomatoSprite
-    o.collectable = o.drawAsSprite
-    o.expireWhenOffScreenBy = expireWhenOffScreenBy
-    newestBooster = o
-    return newestBooster
-end

src/main.lua

@@ -17,6 +17,7 @@ import("systems/collision-resolution.lua")
 import("systems/draw.lua")
 import("systems/gravity.lua")
 import("systems/rounds.lua")
+import("systems/spawner.lua")
 import("systems/velocity.lua")
 import("ingredients/ingredients.lua")
 import("cart.lua")
@@ -41,14 +42,6 @@ floor = {
     sparkOnCollision = true,
 }
 
-Camera = {
-    --- The upper-left corner of the Camera is represented by this `pan` value
-    pan = {
-        x = 0,
-        y = 0,
-    },
-}
-
 Score = {
     points = 0,
 }
@@ -67,6 +60,7 @@ world = tiny.world(
     fallSystem,
     velocitySystem,
     roundSystem,
+    spawnerSystem,
     collectedEntities,
     collidingEntities,
     collisionResolution,
@@ -77,16 +71,9 @@ world = tiny.world(
     floor,
     cart
 )
+addAllSpawners(world)
 
-local ingredientsEveryX = 60
-
-local function init()
-    for i = 1, Ingredients.cacheSize() do
-        world:addEntity(Ingredients.getNext(i * ingredientsEveryX + (math.random(0, 20)), math.random(50, 200)))
-    end
-end
-
-init()
+world:addEntity(Ingredients.getFirst())
 
 -- TODO: Re-enable when cart stops
 playdate.setAutoLockDisabled(true)
@@ -97,15 +84,7 @@ function playdate.update()
     gfx.clear(gfx.kColorWhite)
     playdate.drawFPS(5, 5)
 
-    local newestX = Ingredients.newestIngredient().position.x
-    local panX = Camera.pan.x
-    local rightEdge = panX + 400
-    local offset = 600
-    while newestX < rightEdge + 100 do
-        newestX = newestX + ingredientsEveryX
-        world:addEntity(Ingredients.getNext(newestX, math.random(-500, 150)))
-    end
-    floor.position.x = Camera.pan.x - offset
+    floor.position.x = Camera.pan.x - 600
 
     world:update(deltaSeconds)
 

src/systems/camera-pan.lua

@@ -2,6 +2,13 @@ local gfx <const> = playdate.graphics
 
 local focusPriority = {}
 
+Camera = {
+    pan = {
+        x = 0,
+        y = 0,
+    },
+}
+
 cameraPanSystem = filteredSystem({ focusPriority = T.number, position = T.XyPair }, function(e, dt)
     if e.focusPriority >= focusPriority.priority then
         focusPriority.position = e.position
@@ -14,7 +21,7 @@ function cameraPanSystem:preProcess()
 end
 
 function cameraPanSystem:postProcess()
-    local panX = math.max(0, focusPriority.position.x - 200)
-    local panY = math.min(0, focusPriority.position.y - 120)
-    gfx.setDrawOffset(-panX, -panY)
+    Camera.pan.x = math.max(0, focusPriority.position.x - 200)
+    Camera.pan.y = math.min(0, focusPriority.position.y - 120)
+    gfx.setDrawOffset(-Camera.pan.x, -Camera.pan.y)
 end

src/systems/filter-types.lua

@@ -16,6 +16,8 @@ local XyPair = { x = 1, y = 1 }
 
 ---@alias RoundStateAction "end" | "start"
 
+---@alias CanSpawn { entity: Entity }
+
 T = {
     XyPair = XyPair,
     bool = true,
@@ -44,7 +46,9 @@ T = {
     ---@type pd_image
     PdImage = {},
     ---@type RoundStateAction
-    RoundStateAction = "start"
+    RoundStateAction = "start",
+    ---@type CanSpawn
+    CanSpawn = {}
 }
 
 ---@generic T

src/systems/spawner.lua

@@ -0,0 +1,108 @@
+local odds = 0
+
+---@type { canSpawn: CanSpawn }
+local selectedSpawner
+
+spawnerSystem = filteredSystem({ canSpawn = T.CanSpawn, odds = T.number }, function(spawner, _, system)
+    if odds <= 0 then
+        return
+    end
+    odds = odds - spawner.odds
+    if odds <= 0 then
+        selectedSpawner = spawner
+    else
+        selectedSpawner = selectedSpawner or spawner
+    end
+end)
+
+--- process() and postProcess() are skipped when preProcess() returns true
+function spawnerSystem:preProcess()
+    local newestX = Ingredients.newestIngredient().position.x
+    local panX = Camera.pan.x
+    local rightEdge = panX + 400
+
+    if newestX < rightEdge + 100 then
+        odds = math.random()
+        selectedSpawner = nil
+        return false -- A new ingredient needs spawning!
+    end
+
+    -- We do not need a new ingredient at this time
+    return true
+end
+
+-- Currently spawns AT MOST one new ingredient per frame, which is probably not enough at high speeds!
+function spawnerSystem:postProcess()
+    local newestX = Ingredients.newestIngredient().position.x
+    local newlySpawned = Ingredients.nextInCache()
+
+    -- TODO: If performance becomes an issue, maybe just swap out __index
+    for k, v in pairs(selectedSpawner.canSpawn.entity) do
+        newlySpawned[k] = v
+    end
+
+    -- TODO: May not need to include lower spawners when we reach higher altitudes.
+    local panY = math.floor(Camera.pan.y or 0)
+    local yRange = selectedSpawner.canSpawn.yRange or { top = panY - 240, bottom = panY + 220 }
+    newlySpawned.position = { x = newestX + 60, y = math.random(yRange.top, yRange.bottom) }
+
+    self.world:addEntity(newlySpawned)
+end
+
+local expireWhenOffScreenBy = { x = 2000, y = 480 }
+
+---@param world World
+function addAllSpawners(world)
+    function addCollectableSpawner(name, spawnerOdds, score, sprite, canBounce, yRange)
+        local sizeX, sizeY = sprite:getSize()
+        local size = { x = sizeX, y = sizeY / 2 }
+
+        world:addEntity({
+            name = name,
+            odds = spawnerOdds,
+            canSpawn = {
+                yRange = yRange,
+                entity = {
+                    score = score,
+                    canBeCollidedBy = 1,
+                    expireAfterCollision = true,
+                    size = size,
+                    drawAsSprite = sprite,
+                    collectable = sprite,
+                    expireWhenOffScreenBy = expireWhenOffScreenBy,
+                    canBounce = canBounce,
+                },
+            },
+        })
+    end
+
+    addCollectableSpawner("Lettuce", 0.7, 1, LettuceSprite, {
+        flat = { x = 22, y = 190 },
+        mult = { x = 1, y = -0.5 },
+    })
+
+    addCollectableSpawner("Tomato", 0.1, 15, TomatoSprite)
+
+    addCollectableSpawner("Mushroom", 0.7, 5, MushroomSprite, {
+        flat = { x = 0, y = 290 },
+        mult = { x = 1, y = -1 },
+    }, { top = 219, bottom = 223 })
+
+    addCollectableSpawner("Cheese", 0.05, 1, CheeseSprite, {
+        flat = { x = 50, y = 390 },
+        mult = { x = 0.7, y = -0.5 },
+    })
+end
+
+function getAvailableSpawnerUpgrades()
+    local upgrades = {}
+    for _, spawner in pairs(spawnSystem.entities) do
+        if spawner.hasUpgradeSpeed then
+            upgrades[#upgrades + 1] = { hasUpgradeSpeed = spawner.hasUpgradeSpeed }
+        end
+        if spawner.hasUpgradeValue then
+            upgrades[#upgrades + 1] = { hasUpgradeValue = spawner.hasUpgradeValue }
+        end
+    end
+    return upgrades
+end