Added screen shake to the siren

main.lua

@@ -2,10 +2,10 @@ require 'globals'
 
 local Display = require 'src.display'
 local GameCore = require 'src.core.game_core'
-
+local flux = require 'packages.flux'
+local timer = require 'packages.timer'
 
 local display
-
 local core
 
 
@@ -13,11 +13,12 @@ function love.load()
     math.randomseed(os.time())
 
     display = Display.new(VIRTUAL_WIDTH, VIRTUAL_HEIGHT)
-
     core = GameCore.new()
 end
 
 function love.update(dt)
+    timer.update(dt)
+    flux.update(dt)
     core:update(dt)
 end
 

src/display/camera.lua

@@ -1,4 +1,5 @@
 local gamera = require 'packages.gamera'
+local vector = require 'packages.vector-light'
 
 local Camera = {}
 Camera.__index = Camera
@@ -9,7 +10,11 @@ Camera.__index = Camera
 function Camera.new(worldWidth, worldHeight)
     local self = setmetatable({}, Camera)
 
-    self.camera = gamera.new(0, 0, worldWidth, worldHeight)
+    local px, py = VIRTUAL_WIDTH / 2, VIRTUAL_HEIGHT / 2
+    self.camera = gamera.new(0 - px, 0 - py, worldWidth + (2 * px), worldHeight + (2 * py))
+
+    local x, y = self.camera:getPosition()
+    self.target = { x = x, y = y }
 
     return self
 end
@@ -29,7 +34,14 @@ end
 --- @param y (number)
 function Camera:moveTo(x, y)
     -- TODO: Smoothing function
+    self.target = { x = x, y = y }
     self.camera:setPosition(x, y)
 end
 
+function Camera:shake(intensity)
+    local t = 1 - intensity
+    local vx, vy = vector.randomDirection(math.exp(t * 5))
+    self.camera:setPosition(self.target.x + vx, self.target.y + vy)
+end
+
 return Camera

src/entities/enemies/siren.lua

@@ -1,6 +1,7 @@
 local LoveNode = require 'src.utils.love_node'
 local vector = require 'packages.vector-light'
 local random = require 'src.utils.random'
+require 'src.utils.math'
 
 
 local Siren = {}
@@ -35,6 +36,13 @@ function Siren:update(dt)
         self.pos = self:_findSpawnPoint()
     elseif self.distanceToPlayer < self.stats.maxEffectiveRadius then
         -- Shake screen
+        self.game.camera:shake(
+            math.maprange(
+                self.distanceToPlayer,
+                self.stats.minEffectiveRadius, self.stats.maxEffectiveRadius,
+                0, 1
+            )
+        )
     end
 end