Res: Add a bouncing logo demo script

res/scripts/logo-bounce.lua

@@ -0,0 +1,44 @@
+math.randomseed(os.time())
+local state = {}
+state.logo = image.load(script.dir .. "/logo.png")
+state.overlay = canvas:newLayer(state.logo.width, state.logo.height)
+state.overlay.image:drawImageOpaque(state.logo, 0, 0)
+state.x = math.random() * (canvas:screenWidth() - state.logo.width)
+state.y = math.random() * (canvas:screenHeight() - state.logo.height)
+state.direction = math.floor(math.random() * 3)
+state.speed = 0.5
+
+state.overlay:setPosition(math.floor(state.x), math.floor(state.y))
+state.overlay:update()
+
+function state.update()
+	if state.direction & 1 == 1 then
+		state.x = state.x + 1
+		if state.x > canvas:screenWidth() - state.logo.width then
+			state.x = (canvas:screenWidth() - state.logo.width) * 2 - state.x
+			state.direction = state.direction ~ 1
+		end
+	else
+		state.x = state.x - 1
+		if state.x < 0 then
+			state.x = -state.x
+			state.direction = state.direction ~ 1
+		end
+	end
+	if state.direction & 2 == 2 then
+		state.y = state.y + 1
+		if state.y > canvas:screenHeight() - state.logo.height then
+			state.y = (canvas:screenHeight() - state.logo.height) * 2 - state.y
+			state.direction = state.direction ~ 2
+		end
+	else
+		state.y = state.y - 1
+		if state.y < 0 then
+			state.y = -state.y
+			state.direction = state.direction ~ 2
+		end
+	end
+	state.overlay:setPosition(math.floor(state.x), math.floor(state.y))
+end
+
+callbacks:add("frame", state.update)