Coffeescript Game Tutorial the Mouse

마우스 이벤트 처리 코드를 추가하였다.

init_mouse = ->
canvasMinX = 0
canvasMaxX = canvasMinX + WIDTH

document.onmousemove = (evt) ->
if evt.pageX > canvasMinX and evt.pageX < canvasMaxX
paddlex = evt.pageX - canvasMinX

draw = ->
clear()
circle(x, y, 10)

# move the paddle if left or right is currently pressed
paddlex += 5 if rightDown
paddlex -= 5 if leftDown
rect(paddlex, HEIGHT-paddleh, paddlew, paddleh)

dx = -dx if x + dx > WIDTH or x + dx < 0
if y + dy < 0 then dy = -dy
else if y + dy > HEIGHT
if x > paddlex and x < paddlex + paddlew
dy = -dy
else
# game over, so stop the animation
clearInterval(intervalId)

x += dx;
y += dy;

window.onload = ->
init()
init_mouse()

Reference