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",to = "red" },from = "yellow",
{name = "calm",from = "red",
{name = "clear",
},
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] STARTEVENT: panic!",
onbeforecalm = function(event) self:log("[FSM]START EVENT: calm!",
onbeforeclear = function(event) self:log("[FSM] STARTEVENT: clear!",
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] LEAVESTATE: 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)
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))
: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 = "",
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",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",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",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
self.fsm_:setupState({
events = {
{name = "start",
oncalm =function(event) self:log("[FSM] FINISH EVENT: calm!") end,
})
创建4个Button
分别是：clear,calm,warn,panic。
如clear按钮
self.clearButton_ =
cc.ui.UIPushButton.new()
:setButtonLabel(cc.ui.UILabel.new({text= "clear",display.top - 540)
:addTo(self)
是否可以调用clear时间，如果可以则调用。其他3个按钮类似。
点击panic按钮后
先调用函数onbeforepanic 输出 [FSM] START EVENT: panic!
然后调用
onleavegreen = function(event) self:log("[FSM]LEAVE STATE: green") end,
接着调用
onred= function(event)self:log("[FSM] ENTER STATE:red") end,
再调用
onchangestate = function(event)self:log("[FSM] CHANGED STATE: " .. event.from .. " to " ..event.to) end,
最后调用
onpanic = function(event) self:log("[FSM]FINISH EVENT: panic!") end,
完成一次状态变化。
