Bullet actor collisions

src/game.lua

@@ -91,6 +91,8 @@ function _update()
     p:update()
   end
 
+  check_collisions()
+
   --slidervalue = pgui:component("hslider",{pos=vec(190,20),value=slidervalue})
 
   pgui:component("vstack",{stroke=true,pos=vec(0,0),color={0,18,12,0,7,6},height=0,margin=3,gap=3,contents={
@@ -227,4 +229,34 @@ function render_layer(layer)
 		end
 	end	
 
-end
+end
+
+function distance(x1, y1, x2, y2)
+  return math.sqrt((x2 - x1)^2 + (y2 - y1)^2)
+end
+
+function collided(act, bul)
+  -- Calculate distance between actor and bullet
+  local dist = distance(act.x, act.y, bul.x, bul.y)
+  
+  -- Check if distance is less than actor's half size and bullet's radius
+  return dist < (bul.radius + math.min(act.w, act.h) / 2)
+end
+
+function check_collisions()
+  for _, actor in ipairs(actors) do
+    if (actor.shootable) then 
+      for _, bullet in ipairs(bullets) do
+          if collided(actor, bullet) --[[and not bullet.destroyed]] then
+              -- Destroy bullet
+              bullet:destroy()
+              
+              -- Damage actor
+              actor:damage(bullet.damage)
+          end
+      end
+    end
+end
+
+end
+