move into
https://github.com/kyorohiro/doc_2dgame/tree/master/demo/ironheart
(-)------------(+) x
(-)
|
|
|
(+)
y
clock
(-90)
|
|
|
|
|
---------------(0)
|
|
|
|
|
(90)
(0)
|
|
(-)-------|----------(+)
( ^ )