mike: changed col_detect to screen_col_detect; speed up ball; paddle now has collison detection and reversing ability

love/mike/lib/functions.lua

@@ -1,4 +1,4 @@
-function col_detect(object, display)
+function screen_col_detect(object, display)
   if not (object.x >= -1 and 
     object.x <= (display.width - object.width)) then
     return false
@@ -22,17 +22,48 @@ function create_object(start_x, start_y, width, height, speed)
 	return object
 end
 
+function num_is_pos(number)
+	if number > 0 then
+		return true
+	else return false
+	end
+end
+
 function ball_bounce(ball)
+	local paddle_hit = false
 	ball.x = ball.x + ball.x_speed
 	ball.y = ball.y + ball.y_speed
 
+	--If ball hits screen wall
 	if ball.x >= screen.width or ball.x < 0 then
 		ball.x_speed = ball.x_speed * -1
 	end
+
+	--If ball hits screen top/bottom
 	if ball.y >= screen.height or ball.y <0 then
 		ball.y_speed = ball.y_speed * -1
 	end
+
+	--If ball hits paddle 
+	if ball.y + 1 >= player.y and
+		 ball.x >= player.x and
+		 ball.x <= player.x + player.width then
+		 ball.y_speed = ball.y_speed *-1
+		 paddle_hit = true
+	 end
+
+	 if paddle_hit == true then
+		 if ball.x < player.x + (player.width/2) and
+			 num_is_pos(ball.x_speed) then
+			 ball.x_speed = ball.x_speed *-1
+		 elseif ball.x > player.x + (player.width/2) and
+			 not num_is_pos(ball.x_speed) then
+			 ball.x_speed = ball.x_speed *-1
+		 end
+	 end
+
 	return ball
 end
 
 
+	

love/mike/lib/keys.lua

@@ -57,7 +57,7 @@ function check_keys(object)
 --		newObject.y = newObject.y + newObject.speed
 --	end
 	
-	if col_detect(newObject, screen) then
+	if screen_col_detect(newObject, screen) then
 		return newObject
 	else
 		return object

love/mike/main.lua

@@ -12,7 +12,7 @@ function love.load()
 	-- Create a table to hold all the player data
 	player = create_object(screen.width /2, screen.height - 50, 25, 5, 10)
 	-- Create a table to hold ball data
-	ball = create_object(screen.width /2, screen.height /2, 1, 1, 5)
+	ball = create_object(screen.width /2, screen.height /2, 1, 1, 10)
 	ball.x_speed = ball.speed /2
 	ball.y_speed = ball.speed /2