controls rework

lib/controls.lua

@@ -1,3 +1,5 @@
+local utils = require "lib/utils"
+
 --- @alias Device "mouse" | "key" | "pad"
 
 --- @param device Device
@@ -8,7 +10,8 @@ local function control(device, key)
     return t
 end
 
-local keymap = {
+local controls = {}
+controls.keymap = {
     cameraMoveUp = control("key", "w"),
     cameraMoveLeft = control("key", "a"),
     cameraMoveRight = control("key", "d"),
@@ -17,51 +20,44 @@ local keymap = {
     select = control("mouse", "1")
 }
 
-local keymapCache = {}
+local currentKeys = {}
+local cachedKeys = {}
 
-function keymap:isDown(key)
-    if not keymap[key] then
-        keymapCache[key] = false
-        return false
+--- polling controls in O(n)
+--- should be called at the beginning of every frame
+function controls:poll()
+    for k, v in pairs(self.keymap) do
+        local type = v.type
+        local idx = v.key
+        if type == "key" then
+            currentKeys[k] = love.keyboard.isDown(idx)
+        end
+
+        if type == "mouse" then
+            if not tonumber(idx) then return false end
+            currentKeys[k] = love.mouse.isDown(tonumber(idx) --[[@as number]])
+        end
     end
-
-    local type = keymap[key].type
-    local idx = keymap[key].key
-    if type == "key" then
-        keymapCache[key] = love.keyboard.isDown(idx)
-    end
-
-    if type == "mouse" then
-        if not tonumber(idx) then return false end
-        keymapCache[key] = love.mouse.isDown(tonumber(idx) --[[@as number]])
-    end
-
-    return keymapCache[key]
 end
 
-
---- Вернуть true, если клавиша нажата в этот тик (ток) и не была нажата в прошлый тик (youtube shorts)
-function keymap:isJustPressed(key)
-    if not keymap[key] then
-        return false
+--- store active controls
+--- should be called at the end of every frame
+function controls:cache()
+    for k, v in pairs(currentKeys) do
+        cachedKeys[k] = v
     end
-
-    if keymapCache[key] then
-        return false
-    end
-
-    local type = keymap[key].type
-    local idx = keymap[key].key
-    if type == "key" then
-        keymapCache[key] = love.keyboard.isDown(idx)
-    end
-
-    if type == "mouse" then
-        if not tonumber(idx) then return false end
-        keymapCache[key] = love.mouse.isDown(tonumber(idx) --[[@as number]])
-    end
-
-    return keymapCache[key]
 end
 
-return keymap
+--- check if a control is active
+--- @param key string
+function controls:isDown(key)
+    return not not currentKeys[key]
+end
+
+--- check if a control was activated during current logical frame
+--- @param key string
+function controls:isJustPressed(key)
+    return currentKeys[key] and not cachedKeys[key]
+end
+
+return controls

main.lua

@@ -16,8 +16,10 @@ function love.load()
 end
 
 function love.update(dt)
+    Tree.controls:poll()
     Tree.panning:update(dt)
     Tree.level:update(dt)
+    Tree.controls:cache()
 end
 
 function love.draw()