quick-cocos2d-x 学习系列之十五状态机

quick-cocos2d-x 学习系列之十五状态机

1. 代码

-- create Finite StateMachine

self.fsm_ = {}

cc.GameObject.extend(self.fsm_)

:addComponent("components.behavior.StateMachine")

:exportMethods()

self.fsm_:setupState({

events = {

{name = "start", from =
"none", to = "green" },

{name = "warn", from =
"green", to = "yellow"},

{name = "panic", from =
"green", to = "red" },

{name = "panic", from =
"yellow", to = "red" },

{name = "calm", from =
"red", to = "yellow"},

{name = "clear", from =
"red", to = "green" },

{name = "clear", from =
"yellow", to = "green" },

callbacks = {

onbeforestart = function(event)
self:log("[FSM] STARTING UP")
end,

onstart = function(event)
self:log("[FSM]READY")
end,

onbeforewarn = function(event)
self:log("[FSM]START EVENT: warn!",
true) end,

onbeforepanic = function(event)
self:log("[FSM] START EVENT: panic!",
true) end,

onbeforecalm = function(event)
self:log("[FSM]START EVENT: calm!",
true) end,

onbeforeclear = function(event)
self:log("[FSM] START EVENT: clear!",
true) end,

onwarn = function(event)
self:log("[FSM]FINISH EVENT: warn!")
end,

onpanic = function(event)
self:log("[FSM]FINISH EVENT: panic!")
end,

oncalm = function(event)
self:log("[FSM]FINISH EVENT: calm!")
end,

onclear = function(event)
self:log("[FSM]FINISH EVENT: clear!")
end,

onleavegreen = function(event)
self:log("[FSM]LEAVE STATE: green")
end,

onleaveyellow = function(event)
self:log("[FSM] LEAVE STATE: yellow")
end,

onleavered = function(event)

self:log("[FSM] LEAVE STATE: red")

self:pending(event,
3)

self:performWithDelay(function()

self:pending(event,
2)

self:performWithDelay(function()

self:pending(event,
1)

self:performWithDelay(function()

self.pendingLabel_:setString("")

event.transition()

end,
1)

return
"async"

end,

ongreen = function(event)
self:log("[FSM]ENTER STATE: green")
end,

onyellow = function(event)
self:log("[FSM]ENTER STATE: yellow")
end,

onred = function(event)
self:log("[FSM]ENTER STATE: red")
end,

onchangestate = function(event)
self:log("[FSM] CHANGED STATE: " ..
event.from .. " to " ..
event.to) end,

})

-- createUI

display.newColorLayer(cc.c4b(255,
255, 255,
255))

:addTo(self)

cc.ui.UILabel.new({

text = "Finite State Machine",

size = 32,

color = display.COLOR_BLACK

})

:align(display.CENTER, display.cx,display.top -
60)

:addTo(self)

self.pendingLabel_ =
cc.ui.UILabel.new({

text = "",

size = 32,

color = display.COLOR_BLACK,

x = display.cx,

y = display.top -
620,

})

:align(display.CENTER)

:addTo(self)

-- preloadtexture

self.stateImage_ =
display.newSprite("#GreenState.png")

:pos(display.cx, display.top-
300)

:scale(1.5)

:addTo(self)

self.clearButton_ =

cc.ui.UIPushButton.new()

:setButtonLabel(cc.ui.UILabel.new({text=
"clear", size = 32, color =
display.COLOR_BLACK}))

:onButtonClicked(function()

if
self.fsm_:canDoEvent("clear")
then

self.fsm_:doEvent("clear")

end

end)

:align(display.CENTER, display.cx-
150, display.top -
540)

:addTo(self)

self.calmButton_ =

cc.ui.UIPushButton.new()

:setButtonLabel(cc.ui.UILabel.new({text=
"calm", size = 32, color =
display.COLOR_BLACK}))

:onButtonClicked(function()

if
self.fsm_:canDoEvent("calm")
then

self.fsm_:doEvent("calm")

end

end)

:align(display.CENTER, display.cx-
50, display.top-
540)

:addTo(self)

self.warnButton_ =

cc.ui.UIPushButton.new()

:setButtonLabel(cc.ui.UILabel.new({text=
"warn", size = 32, color =
display.COLOR_BLACK}))

:onButtonClicked(function()

if
self.fsm_:canDoEvent("warn")
then

self.fsm_:doEvent("warn")

end

end)

:align(display.CENTER, display.cx+
50, display.top-
540)

:addTo(self)

self.panicButton_ =

cc.ui.UIPushButton.new()

:setButtonLabel(cc.ui.UILabel.new({text=
"panic", size = 32, color =
display.COLOR_BLACK}))

:onButtonClicked(function()

if
self.fsm_:canDoEvent("panic")
then

self.fsm_:doEvent("panic")

end

end)

:align(display.CENTER, display.cx+
150, display.top -
540)

:addTo(self)

-- debug

self.logCount_ =
0

程序开始时候设置状态为green.

1.1 函数log

打印信息，根据打印状态变化图片。

1.2 函数pengding

打印状态信息，并设置LABEL字符串。

2. 解释

创建有限状态机

-- createFinite State Machine

self.fsm_ = {}

cc.GameObject.extend(self.fsm_)

:addComponent("components.behavior.StateMachine")

:exportMethods()

设置有限状态机回调函数