moving asteroids

main.lua

@@ -13,6 +13,24 @@ function love.load()
     bullets = {}
     bulletTimerLimit = 0.5
     bulletTimer = bulletTimerLimit
+
+    asteroids = {
+        {
+            x = 100,
+            y = 100,
+        },
+        {
+            x = arenaWidth - 100,
+            y = 100,
+        },
+        {
+            x = arenaWidth / 2,
+            y = arenaHeight - 100,
+        }
+    }
+    for asteroidIndex, asteroid in ipairs(asteroids) do
+        asteroid.angle = love.math.random() * (2 * math.pi)
+    end
 end
 
 function love.update(dt)
@@ -58,6 +76,12 @@ function love.update(dt)
             })
         end
     end
+
+    for asteroidIndex, asteroid in ipairs(asteroids) do
+        local asteroidSpeed = 20
+        asteroid.x = (asteroid.x + math.cos(asteroid.angle) * asteroidSpeed * dt) % arenaWidth
+        asteroid.y = (asteroid.y + math.cos(asteroid.angle) * asteroidSpeed * dt) % arenaHeight
+    end
 end
 
 function love.draw()
@@ -80,6 +104,11 @@ function love.draw()
                 love.graphics.setColor(0, 1, 0)
                 love.graphics.circle('fill', bullet.x, bullet.y, 5)
             end
+
+            for asteroidIndex, asteroid in ipairs(asteroids) do
+                love.graphics.setColor(1, 1, 0)
+                love.graphics.circle('fill', asteroid.x, asteroid.y, 80)
+            end
         end
     end