add bullet actor

asteroids/actors.lua

@@ -1,3 +1,4 @@
+local love = require("love")
 local phys = require("phys")
 local inspect = require("inspect")
 
@@ -26,8 +27,53 @@ function actors.buildActors(game)
         return instance
     end
 
+    function asteroids:draw()
+        local width = self.sprite:getWidth()
+        local height = self.sprite:getHeight()
+        love.graphics.push()
+        love.graphics.setColor(1, 1, 1)
+        local scale = 2 * self.radius / math.max(width, height)
+        love.graphics.draw(self.sprite,
+            self.x,
+            self.y,
+            self.facing,
+            scale,
+            scale,
+            width / 2,
+            height / 2
+        )
+        love.graphics.pop()
+    end
+
+    local bullets = {}
+    local bullets_mt = { __index = bullets }
+
+    function bullets.new(bullet)
+        local instance = {
+            spin = 0,
+        }
+        for k, v in pairs(game.ship.bullet) do
+            instance[k] = v
+        end
+        for k, v in pairs(bullet) do
+            instance[k] = v
+        end
+        instance.sound = love.audio.newSource(game.ship.bullet.sound)
+        instance.timeLeft = instance.time
+        setmetatable(instance, bullets_mt)
+        return instance
+    end
+
+    function bullets:draw()
+        love.graphics.push()
+        love.graphics.setColor(0, 1, 0)
+        love.graphics.circle('fill', self.x, self.y, self.radius)
+        love.graphics.pop()
+    end
+
     return {
         asteroids = asteroids,
+        bullets = bullets,
     }
 end
 

asteroids/main.lua

@@ -166,20 +166,16 @@ function love.gamepadpressed(joystick, button)
     end
     if button == "b" then
         -- debounce, perhaps
-        local bullet = {
+        local bullet = state.actors.bullets.new({
             x = state.ship.x + math.cos(state.ship.facing) * game.ship.radius,
             y = state.ship.y + math.sin(state.ship.facing) * game.ship.radius,
             angle = state.ship.facing,
-            speed = game.ship.bullet.speed,
-            radius = game.ship.bullet.radius,
-            timeLeft = game.ship.bullet.time,
-            sound = love.audio.newSource(game.ship.bullet.sound),
             facing = state.ship.facing,
-            spin = 0,
-        }
+        })
         phys.apply(bullet, state.ship)
         table.insert(state.bullets, bullet)
         bullet.sound:play()
+
         phys.apply(state.ship, { speed = game.ship.bullet.recoil, angle = state.ship.facing + phys.tau / 2 })
     end
     if button == "x" then
@@ -215,22 +211,11 @@ function love.draw()
             love.graphics.pop()
 
             for _, bullet in ipairs(state.bullets) do
-                love.graphics.setColor(0, 1, 0)
-                love.graphics.circle('fill', bullet.x, bullet.y, game.ship.bullet.radius)
+                bullet:draw()
             end
 
             for _, asteroid in ipairs(state.asteroids) do
-                love.graphics.setColor(1, 1, 1)
-                scale = 2 * asteroid.radius / math.max(asteroid.sprite:getWidth(), asteroid.sprite:getHeight())
-                love.graphics.draw(asteroid.sprite,
-                    asteroid.x,
-                    asteroid.y,
-                    asteroid.facing,
-                    scale,
-                    scale,
-                    asteroid.sprite:getWidth() / 2,
-                    asteroid.sprite:getHeight() / 2
-                )
+                asteroid:draw()
             end
         end
     end