Fix collision detection.

main.lua

@@ -0,0 +1,34 @@
+function _init()
+   init_movement()
+   init_mapgen()
+   generate_map({0, 0})
+   debug = true
+end
+
+
+function _update()
+   handle_input()
+   if (btn(5) and btn(4) and btnp(3)) debug = not debug
+end
+
+function _draw()
+   rectfill(0, 0, 127, 127, 0)
+   -- the screen is 128x128 pixels, so we can only draw 16x16 sprites
+   map(camera_pos[1], camera_pos[2], 0, 0, 16, 16)
+   draw_player()
+   if debug then
+      render_debug_info()
+   end
+end
+
+function render_debug_info()
+   clip(0, 0, 32, 32)
+   rectfill(0, 0, 32, 32, 0)
+   print(stat(0), 0, 0, 15)
+   print(camera_pos[1], 0, 8, 15)
+   print(camera_pos[2], 16, 8, 15)
+   print(facing[1], 0, 16, 15)
+   print(facing[2], 16, 16, 15)
+   print(fget(mget(camera_pos[1]+8, camera_pos[2]+8)), 0, 24, 15)
+   clip()
+end