Add launcher, level borders

main.lua

@@ -1,15 +1,72 @@
+local tau = math.pi * 2
 local game = {}
 
 function love.load(arg)
-  game.images = {}
+  game.window_width, game.window_height = love.graphics.getDimensions()
 
-  game.images.background = love.graphics.newImage('images/background.png')
-  game.images.background_width = game.images.background:getWidth()
+  game.bubble_diameter = 60
+  game.bubble_radius = game.bubble_diameter / 2
+
+  -- vertical distance between bubble center points
+  game.row_gap = math.ceil(math.sqrt(
+    (game.bubble_diameter * game.bubble_diameter) -
+    (game.bubble_radius * game.bubble_radius)
+  ))
+
+  game.background_image = love.graphics.newImage('images/background.png')
+  game.background_width = game.background_image:getWidth()
+
+  local bubbles_wide = 8
+  local bubbles_high = 14
+  game.level_width = bubbles_wide * game.bubble_diameter
+  game.level_height = (bubbles_high - 1) * game.row_gap + game.bubble_diameter
+  game.level_x = (game.window_width - game.level_width) / 2
+  game.level_y = game.bubble_radius
+
+  game.launcher_image = love.graphics.newImage('images/launcher.png')
+  game.launcher_height = game.launcher_image:getHeight()
+  game.launcher_width = game.launcher_image:getWidth()
+  game.launcher_x = game.window_width / 2
+  game.launcher_y = game.level_y + game.level_height + game.bubble_diameter
+  game.launcher_offset_x = 90 -- rotation point in launcher image
+  game.launcher_offset_y = game.launcher_height / 2
+  game.launcher_rotation = -tau / 4 -- up
 end
 
 function love.draw()
-  love.graphics.draw(game.images.background, 0, 0)
-  love.graphics.draw(game.images.background, game.images.background_width, 0)
+  -- draw background
+  love.graphics.setColor(1, 1, 1, 1)
+  love.graphics.draw(game.background_image, 0, 0)
+  love.graphics.draw(game.background_image, game.background_width, 0)
+
+  -- draw level border
+  love.graphics.setColor(0, 0, 0, 1)
+  love.graphics.rectangle(
+    'line',
+    game.level_x,
+    game.level_y,
+    game.level_width,
+    game.level_height
+  )
+
+  -- draw launcher
+  love.graphics.setColor(1, 1, 1, 1)
+  love.graphics.draw(
+    game.launcher_image,
+    game.launcher_x,
+    game.launcher_y,
+    game.launcher_rotation,
+    1,
+    1,
+    game.launcher_offset_x,
+    game.launcher_offset_y
+  )
+end
+
+function love.mousemoved(x, y, dx, dy, is_touch)
+  local diff_x = x - game.launcher_x
+  local diff_y = y - game.launcher_y
+  game.launcher_rotation = math.atan2(diff_y, diff_x)
 end
 
 function love.keypressed(key, scan_code, is_repeat)