Explosions are now separate. FPS got better?

bad.lua

@@ -4,43 +4,24 @@ function Bad:new(x, y)
     return setmetatable({
         x = x,
         y = y,
-        state = "enter"
+        dead = false
     }, {__index = self})
 end
 
 function Bad:advance(dt)
-    if self.state == "dying" then
-        self.death_duration = self.death_duration - dt
-
-        if self.death_duration < 0 then
-            self.state = "dead"
-        end
-    end
 end
 
-function Bad:hit(bullet)
-    if self.state == "enter" then
-        self.state = "dying"
-        self.death_duration = 1
-
-        return true
-    end
+function Bad:collide(bullet)
+    self.dead = true
 end
 
 function Bad:draw()
     local size = 20
 
-    if self.state == "enter" then
-        love.graphics.triangle(
-            'line',
-            self.x, self.y + (size / 2),
-            self.x + (size / 2), self.y - (size / 2),
-            self.x - (size / 2), self.y - (size / 2)
-        )
-    elseif self.state == "dying" then 
-        local r, g, b, a = love.graphics.getColor()
-        love.graphics.setColor(math.random() * 255, math.random() * 255, math.random() * 255, self.death_duration * 255)
-        love.graphics.circle('fill', self.x, self.y, 50 * self.death_duration)
-        love.graphics.setColor(r, g, b, a)
-    end
+    love.graphics.triangle(
+        'line',
+        self.x, self.y + (size / 2),
+        self.x + (size / 2), self.y - (size / 2),
+        self.x - (size / 2), self.y - (size / 2)
+    )
 end

bullet.lua

@@ -15,13 +15,6 @@ function Bullet:advance(dt)
     self.y = self.y - self.v * math.cos(self.r) * dt
 end
 
-function Bullet:hits(thing)
-    abs_x = math.abs(self.x - thing.x)
-    abs_y = math.abs(self.y - thing.y)
-    distance = math.sqrt(math.pow(abs_x, 2) + math.pow(abs_y, 2))
-    return distance < self.radius
-end
-
 function Bullet:draw()
     love.graphics.circle('fill', self.x, self.y, self.radius)
 end

main.lua

@@ -1,6 +1,7 @@
 require 'bad'
-require 'ship'
+require 'boom'
 require 'bullet'
+require 'ship'
 
 joystick = {
     n = 0,
@@ -13,13 +14,22 @@ joystick = {
 }
 
 debug = {}
+
+ships = {}
 bullets = {}
 baddies = {}
+booms = {}
+
+live = {ships, bullets, baddies}
+all = {ships, bullets, baddies, booms}
 
 function love.load(arg)
     love.joystick.open(joystick.n)
+
     ship = Ship:new(400, 300, joystick)
-    for i=1,1000,1 do
+    table.insert(ships, ship)
+
+    for i = 1, 1000, 1 do
         table.insert(baddies, Bad:new(math.random() * 500, math.random() * 50))
     end
 end
@@ -35,69 +45,59 @@ function love.joystickreleased(j, b)
     fire_everything = false
 end
 
-function delete_offscreen_bullets()
-    local trash = {}
-
-    for i, v in ipairs(bullets) do
-        if v:is_offscreen() then
-            table.insert(trash, i, 1)
-        end
-    end
-
-    for i, v in ipairs(trash) do
-        table.remove(bullets, v)
-    end
-end
-
-function update_fire_state(dt)
+function update_fire_state()
     if fire_everything then
         table.insert(bullets, Bullet:new(ship.x, ship.y, "player"))
     end
 end
 
-function destroy_baddies()
-    local trash = {}
+function is_colliding(a, b)
+    local abs_x = a.x - b.x
+    local abs_y = a.y - b.y
+    -- LOSING
+    return math.abs(abs_x) < a.radius and math.abs(abs_y) < a.radius
+    -- WINNING
+    -- distance = math.sqrt(abs_x * abs_x + abs_y * abs_y)
+    -- return distance < a.radius
+end
 
-    for i,bad in ipairs(baddies) do 
-        for ib,bullet in ipairs(bullets) do
-            if bullet:hits(bad) then
-                local responded = bad:hit(bullet)
+function collision_detection()
+    for i_bad, bad in ipairs(baddies) do
+        for i_bullet, bullet in ipairs(bullets) do
+            if is_colliding(bullet, bad) then
+                bad:collide(bullet)
 
-                if responded then
-                    table.insert(trash, ib, 1)
-                    break
+                if bad.dead then
+                    table.remove(baddies, i_bad)
+                    table.insert(booms, Boom:new(bad.x, bad.y))
                 end
+
+                table.remove(bullets, i_bullet)
             end
         end
     end
+end
 
-    for i, v in ipairs(trash) do
-        table.remove(bullets, v)
-    end
+function update()
+    update_fire_state()
+    collision_detection()
 end
 
 function advance(dt)
-    for i, things in ipairs({{ship}, bullets, baddies}) do
-        for i, t in ipairs(things) do
+    for i_things, things in ipairs(all) do
+        for i_t, t in ipairs(things) do
             t:advance(dt)
+
+            if t.dead then
+                table.remove(things, i_t)
+            end
         end
     end
 end
 
-function update(dt)
-    update_fire_state(dt)
-
-    destroy_baddies()
-end
-
-function clean()
-    delete_offscreen_bullets()
-end
-
 function love.update(dt)
-    update(dt)
     advance(dt)
-    clean()
+    update(dt)
 end
 
 function love.keypressed(k)
@@ -107,7 +107,7 @@ function love.keypressed(k)
 end
 
 function love.draw()
-    for i, things in ipairs({{ship}, bullets, baddies}) do
+    for i, things in ipairs(all) do
         for i, t in ipairs(things) do
             t:draw()
         end