rework + cool bomber

source/scripts/bomber/smokeCloud.lua

@@ -0,0 +1,54 @@
+SmokeCloud = {}
+class('SmokeCloud').extends(playdate.graphics.sprite)
+
+function SmokeCloud:init(x, y)
+    SmokeCloud.super.init(self)
+
+    self.radius = 25
+    self.maxLife = 150
+    self.life = self.maxLife
+
+    local size = self.radius * 2 + 4
+    self:setSize(size, size)
+    self:setCenter(0.5, 0.5)
+    self:setZIndex(ZIndex.fx - 1)
+    self:moveTo(x, y)
+    self:add()
+    self:markDirty()
+end
+
+function SmokeCloud:update()
+    if not BomberScene.instance then
+        self:remove()
+        return
+    end
+
+    self:moveBy(0, BomberScene.instance.scrollSpeed)
+    self.life = self.life - 1
+
+    if self.life <= 0 or self.y > 280 then
+        self:remove()
+        return
+    end
+
+    self:markDirty()
+end
+
+function SmokeCloud:draw()
+    local t = self.life / self.maxLife
+    local r = self.radius * t
+    local cx = self.width / 2
+    local cy = self.height / 2
+
+    local dither = playdate.graphics.image.kDitherTypeBayer4x4
+    if t < 0.3 then
+        dither = playdate.graphics.image.kDitherTypeBayer8x8
+    elseif t < 0.6 then
+        dither = playdate.graphics.image.kDitherTypeBayer4x4
+    end
+
+    playdate.graphics.setColor(playdate.graphics.kColorBlack)
+    playdate.graphics.setDitherPattern(1 - t * 0.6, dither)
+    playdate.graphics.fillCircleAtPoint(cx, cy, r)
+    playdate.graphics.setColor(playdate.graphics.kColorBlack)
+end