cocos2dx « 爱好玩

这2个函数可以用于Jenkins打包脚本中

iOS

#获取iOS版本号
function getBundleVerion()
{
    /usr/libexec/PlistBuddy -c "Print CFBundleVersion" proj.ios_mac/ios/Info.plist
}

version=$(getBundleVerion)

#获取iOS版本号

function getBundleVerion()

{

/usr/libexec/PlistBuddy -c "Print CFBundleVersion" proj.ios_mac/ios/Info.plist

}

version=$(getBundleVerion)

android

#获取安卓版本号
function getAndroidVersion()
{
    cat proj.android/AndroidManifest.xml | grep "android:versionName=" | sed 's/^.*android:versionName="//g' | sed 's/".*$//g'
}

version=$(getAndroidVerion)

#获取安卓版本号

function getAndroidVersion()

{

cat proj.android/AndroidManifest.xml | grep "android:versionName=" | sed 's/^.*android:versionName="//g' | sed 's/".*$//g'

}

version=$(getAndroidVerion)

ScrollView滚动视图

在游戏开发过程中,由于手机屏幕空间有限,加上手指的灵动性,滑动成了最好的替换翻页的操作方式
ScrollView就是在这种需求驱动下的产物

cc.ScrollView和cc.ui.UIScrollView

前者是cocos2dx3.3原生的c++类,继承于cc.Layer
后者是QuickUI组件中的lua类,继承于cc.ClippingRectangleNode

quick中的cc.ui.UIScrollView用法

local visibleSize = cc.Director:getInstance():getVisibleSize()
local viewRect = cc.rect(0,0,visibleSize.width,visibleSize.height)
local scrollView = cc.ui.UIScrollView.new({
    viewRect = viewRect
})
local scrollNode = display.newLayer()
scrollView:addScrollNode(scrollNode)
-- 注册滚动事件 通过event.name区分
scrollView:onScroll(function(event)
    -- TODO: sth
end)

local visibleSize = cc.Director:getInstance():getVisibleSize()

local viewRect = cc.rect(0,0,visibleSize.width,visibleSize.height)

local scrollView = cc.ui.UIScrollView.new({

viewRect = viewRect

})

local scrollNode = display.newLayer()

scrollView:addScrollNode(scrollNode)

-- 注册滚动事件通过event.name区分

scrollView:onScroll(function(event)

-- TODO: sth

end)

在实际运用过程中,我发现quick的滚动组件存在性能问题(windows上),一旦组件多了之后滚动不流畅,卡顿严重

原生cc.ScrollView用法

local visibleSize = cc.Director:getInstance():getVisibleSize()
local scrollView = cc.ScrollView:create(visibleSize)
local scrollNode = cc.Layer:create() -- 等同于display.newLayer()
scrollView:setContainer(scrollNode)
-- 为scrollView添加滚动事件
scrollView:setDelegate()
scrollView:registerScriptHandler(function()
    -- TODO: sth
end,0) -- 0为滚动事件 1为缩放事件

local visibleSize = cc.Director:getInstance():getVisibleSize()

local scrollView = cc.ScrollView:create(visibleSize)

local scrollNode = cc.Layer:create() -- 等同于display.newLayer()

scrollView:setContainer(scrollNode)

-- 为scrollView添加滚动事件

scrollView:setDelegate()

scrollView:registerScriptHandler(function()

-- TODO: sth

end,0) -- 0为滚动事件 1为缩放事件

前言

Cocos Code IDE(以下简称CCI)是一款基于Eclipse和LDT的代码编辑器,其主要面向Cocos2d-X Lua/JS/Quick-lua的开发

问题的产生

在开发过程中,我们新建一个lua文件,都需要

local ClassName = class("ClassName")

function ClassName:ctor()
end

return ClassName

local ClassName = class("ClassName")

function ClassName:ctor()

end

return ClassName

关键你复制了还需要把”ClassName”改成你要的

相当麻烦

So

我们有模板,在CCI中点击Windows->Preferences在左边选择Lua->Editor->Templates,单击”New”按钮

Name是触发字串,我们填newclass
Context选Lua
Description是提示信息,就叫”新建类”好了
Pattern:

---
--
-- ${time},${date}
-- @author ${user}
--
local ${module_short_name} = class("${module_short_name}")

function ${module_short_name}:ctor()
end

return ${module_short_name}

---

-- ${time},${date}

-- @author ${user}

local ${module_short_name} = class("${module_short_name}")

function ${module_short_name}:ctor()

end

return ${module_short_name}

当你键盘敲出newclass(等代码提示),啪一个回车,一个类就创建好了,还烙上了你的大名,绝对酷炫

这么看大致就懂了,各种宏的含义如下

${date},${time},${user}这就是日期,时间,作者(os的登录名),用来标识这个文件是何时谁创建的,追查问题精确到人
${module_short_name} 短文件名,比如我一个文件”app/views/LoginView.lua”,就可以取到”LoginView”

举一反三

在我的项目中还有很多快捷的模板
比如 function

---
--
function ${module_short_name}:${name}(${parameters})
    ${cursor}
end

---

function ${module_short_name}:${name}(${parameters})

${cursor}

end

比如newlayer

---
--
-- ${time},${date}
-- @author ${user}
--
local ${module_short_name} = class("${module_short_name}",BaseLayer)

function ${module_short_name}:ctor()
    ${module_short_name}.super.ctor(self)
end

function ${module_short_name}:onEnter()
end

function ${module_short_name}:onExit()
end

return ${module_short_name}

---

-- ${time},${date}

-- @author ${user}

local ${module_short_name} = class("${module_short_name}",BaseLayer)

function ${module_short_name}:ctor()

${module_short_name}.super.ctor(self)

end

function ${module_short_name}:onEnter()

end

function ${module_short_name}:onExit()

end

return ${module_short_name}

恩剩下的看大家创造力了有好用的记得在文章下回复~

在出现对话的时候,我们往往不希望文字一下子突然出现,于是有了这个需求

文字要慢慢的出现,但是点击时,一下子显示完

local TimerLabel = class("TimerLabel",function(params)
    return display.newTTFLabel(params)
end)

local TimerLabel = class("TimerLabel", function(params)
    return display.newTTFLabel(params)
end)

TimerLabel.ON_COUNT_DOWN = "ON_COUNT_DOWN"

function TimerLabel:ctor(params)
    cc(self):addComponent("components.behavior.EventProtocol"):exportMethods()
    self:setNodeEventEnabled(true)
    self._triggerTime = params.triggerTime or 0
    self._time = params.time
    self._format = params.format
    self:setString(self:formatTime(self._time,self._format))
end

function TimerLabel:formatTime(timeValue, format)
    if not timeValue then
        return "unknow time"
    end
    local as = math.floor(timeValue / 1000)
    local s = as % 60
    local am = math.floor(as / 60)
    local m = am % 60
    local h = math.floor(am / 60)

    local ss =  nil
    if s < 10 then
        ss = string.format("0%d", s)
    else
        ss = string.format("%d", s)
    end

    local ms =  nil
    if m < 10 then
        ms = string.format("0%d", m)
    else
        ms = string.format("%d", m)
    end

    local hs =  nil
    if h < 10 then
        hs = string.format("0%d", h)
    else
        hs = string.format("%d", h)
    end

    local newTimeString = string.gsub(format, "@H", hs)
    newTimeString = string.gsub(newTimeString, "@M", ms)
    newTimeString = string.gsub(newTimeString, "@S", ss)
    return newTimeString
end

function TimerLabel:update(dt)
    local lastTime = math.ceil(self._time / 1000)
    self._time = self._time - dt * 1000
    if self._time <= 0 then
        self._time = 0
    end

    local nowTime = math.ceil(self._time / 1000)
    if lastTime ~= nowTime then
        self:setString(self:formatTime(self._time,self._format))
    end

    if self._time <= self._triggerTime then
        self:dispatchEvent({name = TimerLabel.ON_COUNT_DOWN})
        if self._updateEntry then
            cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)
            self._updateEntry = nil
        end
    end
end

function TimerLabel:onEnter()
    self._updateEntry = cc.Director:getInstance():getScheduler():scheduleScriptFunc(handler(self,self.update),0,false)
end

function TimerLabel:onExit()
    if self._updateEntry then
        cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)
        self._updateEntry = nil
    end
end

return TimerLabel

local TimerLabel = class("TimerLabel",function(params)

return display.newTTFLabel(params)

end)

local TimerLabel = class("TimerLabel", function(params)

return display.newTTFLabel(params)

end)

TimerLabel.ON_COUNT_DOWN = "ON_COUNT_DOWN"

function TimerLabel:ctor(params)

cc(self):addComponent("components.behavior.EventProtocol"):exportMethods()

self:setNodeEventEnabled(true)

self._triggerTime = params.triggerTime or 0

self._time = params.time

self._format = params.format

self:setString(self:formatTime(self._time,self._format))

end

function TimerLabel:formatTime(timeValue, format)

if not timeValue then

return "unknow time"

end

local as = math.floor(timeValue / 1000)

local s = as % 60

local am = math.floor(as / 60)

local m = am % 60

local h = math.floor(am / 60)

local ss = nil

if s < 10 then

ss = string.format("0%d", s)

else

ss = string.format("%d", s)

end

local ms = nil

if m < 10 then

ms = string.format("0%d", m)

else

ms = string.format("%d", m)

end

local hs = nil

if h < 10 then

hs = string.format("0%d", h)

else

hs = string.format("%d", h)

end

local newTimeString = string.gsub(format, "@H", hs)

newTimeString = string.gsub(newTimeString, "@M", ms)

newTimeString = string.gsub(newTimeString, "@S", ss)

return newTimeString

end

function TimerLabel:update(dt)

local lastTime = math.ceil(self._time / 1000)

self._time = self._time - dt * 1000

if self._time <= 0 then

self._time = 0

end

local nowTime = math.ceil(self._time / 1000)

if lastTime ~= nowTime then

self:setString(self:formatTime(self._time,self._format))

end

if self._time <= self._triggerTime then

self:dispatchEvent({name = TimerLabel.ON_COUNT_DOWN})

if self._updateEntry then

cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)

self._updateEntry = nil

end

function TimerLabel:onEnter()

self._updateEntry = cc.Director:getInstance():getScheduler():scheduleScriptFunc(handler(self,self.update),0,false)

end

function TimerLabel:onExit()

if self._updateEntry then

cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)

self._updateEntry = nil

end

return TimerLabel

用法如下

    local typingLabel = TypingLabel.new({
        text = "这是一个打字机效果,n支持中英数组合,n数字123456英文abcdefg"
    })
    
    typingLabel:addEventListener(TypingLabel.ON_FINISH_TYPING,function(event)
        print("打字机结束")
    end)
    
    typingLabel:align(display.LEFT_TOP,50,display.height - 100):addTo(self)

local typingLabel = TypingLabel.new({

text = "这是一个打字机效果,n支持中英数组合,n数字123456英文abcdefg"

})

typingLabel:addEventListener(TypingLabel.ON_FINISH_TYPING,function(event)

print("打字机结束")

end)

typingLabel:align(display.LEFT_TOP,50,display.height - 100):addTo(self)

有倒计时功能的标签这个还是挺常见的

直接上代码吧

local TimerLabel = class("TimerLabel",function(params)
    return display.newTTFLabel(params)
end)

local TimerLabel = class("TimerLabel", function(params)
    return display.newTTFLabel(params)
end)

TimerLabel.ON_COUNT_DOWN = "ON_COUNT_DOWN"

function TimerLabel:ctor(params)
    cc(self):addComponent("components.behavior.EventProtocol"):exportMethods()
    self:setNodeEventEnabled(true)
    self._triggerTime = params.triggerTime or 0
    self._time = params.time
    self._format = params.format
    self:setString(self:formatTime(self._time,self._format))
end

function TimerLabel:formatTime(timeValue, format)
    if not timeValue then
        return "unknow time"
    end
    local as = math.floor(timeValue / 1000)
    local s = as % 60
    local am = math.floor(as / 60)
    local m = am % 60
    local h = math.floor(am / 60)

    local ss =  nil
    if s < 10 then
        ss = string.format("0%d", s)
    else
        ss = string.format("%d", s)
    end

    local ms =  nil
    if m < 10 then
        ms = string.format("0%d", m)
    else
        ms = string.format("%d", m)
    end

    local hs =  nil
    if h < 10 then
        hs = string.format("0%d", h)
    else
        hs = string.format("%d", h)
    end

    local newTimeString = string.gsub(format, "@H", hs)
    newTimeString = string.gsub(newTimeString, "@M", ms)
    newTimeString = string.gsub(newTimeString, "@S", ss)
    return newTimeString
end

function TimerLabel:update(dt)
    local lastTime = math.ceil(self._time / 1000)
    self._time = self._time - dt * 1000
    if self._time <= 0 then
        self._time = 0
    end

    local nowTime = math.ceil(self._time / 1000)
    if lastTime ~= nowTime then
        self:setString(self:formatTime(self._time,self._format))
    end

    if self._time <= self._triggerTime then
        self:dispatchEvent({name = TimerLabel.ON_COUNT_DOWN})
        if self._updateEntry then
            cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)
            self._updateEntry = nil
        end
    end
end

function TimerLabel:onEnter()
    self._updateEntry = cc.Director:getInstance():getScheduler():scheduleScriptFunc(handler(self,self.update),0,false)
end

function TimerLabel:onExit()
    if self._updateEntry then
        cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)
        self._updateEntry = nil
    end
end

return TimerLabel

local TimerLabel = class("TimerLabel",function(params)

return display.newTTFLabel(params)

end)

local TimerLabel = class("TimerLabel", function(params)

return display.newTTFLabel(params)

end)

TimerLabel.ON_COUNT_DOWN = "ON_COUNT_DOWN"

function TimerLabel:ctor(params)

cc(self):addComponent("components.behavior.EventProtocol"):exportMethods()

self:setNodeEventEnabled(true)

self._triggerTime = params.triggerTime or 0

self._time = params.time

self._format = params.format

self:setString(self:formatTime(self._time,self._format))

end

function TimerLabel:formatTime(timeValue, format)

if not timeValue then

return "unknow time"

end

local as = math.floor(timeValue / 1000)

local s = as % 60

local am = math.floor(as / 60)

local m = am % 60

local h = math.floor(am / 60)

local ss = nil

if s < 10 then

ss = string.format("0%d", s)

else

ss = string.format("%d", s)

end

local ms = nil

if m < 10 then

ms = string.format("0%d", m)

else

ms = string.format("%d", m)

end

local hs = nil

if h < 10 then

hs = string.format("0%d", h)

else

hs = string.format("%d", h)

end

local newTimeString = string.gsub(format, "@H", hs)

newTimeString = string.gsub(newTimeString, "@M", ms)

newTimeString = string.gsub(newTimeString, "@S", ss)

return newTimeString

end

function TimerLabel:update(dt)

local lastTime = math.ceil(self._time / 1000)

self._time = self._time - dt * 1000

if self._time <= 0 then

self._time = 0

end

local nowTime = math.ceil(self._time / 1000)

if lastTime ~= nowTime then

self:setString(self:formatTime(self._time,self._format))

end

if self._time <= self._triggerTime then

self:dispatchEvent({name = TimerLabel.ON_COUNT_DOWN})

if self._updateEntry then

cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)

self._updateEntry = nil

end

function TimerLabel:onEnter()

self._updateEntry = cc.Director:getInstance():getScheduler():scheduleScriptFunc(handler(self,self.update),0,false)

end

function TimerLabel:onExit()

if self._updateEntry then

cc.Director:getInstance():getScheduler():unscheduleScriptEntry(self._updateEntry)

self._updateEntry = nil

end

return TimerLabel

用法如下

    local timerLabel = TimerLabel.new({
        time = 60000,
        format = "TimerLabel演示:@M:@S"
    })

    timerLabel:addEventListener(TimerLabel.ON_COUNT_DOWN,function(event)
        print("倒计时结束")
    end)

    timerLabel:align(display.LEFT_TOP,50,display.height - 50):addTo(self)

local timerLabel = TimerLabel.new({

time = 60000,

format = "TimerLabel演示:@M:@S"

})

timerLabel:addEventListener(TimerLabel.ON_COUNT_DOWN,function(event)

print("倒计时结束")

end)

timerLabel:align(display.LEFT_TOP,50,display.height - 50):addTo(self)

除了text外,display.newTTFLabel里的所有参数都有效
新增了time参数(单位毫秒),format参数(支持H M S),triggerTime参数(触发事件,不传时为0)
倒计时结束会触发TimerLabel.ON_COUNT_DOWN

2.x时代的CCControlButton的确十分方便,策划们也十分喜欢按下有缩放的效果

到了3.x的项目,工具链已经相当完善,我使用的是cocos2dx3.2+quick3.2rc1+cocos code ide 1.0.1+cocos studio 1.6(以下简称ccs)

在ccs里建立的按钮,到了程序里实际上是UIPushButton

从quick的源码可以看出,UIPushButton继承于UIButton,UIButton继承于cc.Node

那么按下弹起的效果就得自己写了,好在quick扩展的方式很方便

local UIButton = require("framework.cc.ui.UIButton")

UIButtonEx = {}

function UIButtonEx.extend(btn)
	function btn:setPressedActionEnabled(enabled)
		if enabled then
			self.onPressed = function()
				self:setScale(0.9) --1.1
			end

			self.onRelease = function()
				self:setScale(1.0)
			end
			self:onButtonPressed(self.onPressed)
			self:onButtonRelease(self.onRelease)
		else
			if self.onPressed then
				self:removeEventListenersByEvent(UIButton.PRESSED_EVENT)
				self.onPressed = nil
			end
			if self.onRelease then
				self:removeEventListenersByEvent(UIButton.RELEASE_EVENT)
				self.onRelease = nil
			end

		end
	end
end

local UIButton = require("framework.cc.ui.UIButton")

UIButtonEx = {}

function UIButtonEx.extend(btn)

function btn:setPressedActionEnabled(enabled)

if enabled then

self.onPressed = function()

self:setScale(0.9) --1.1

end

self.onRelease = function()

self:setScale(1.0)

end

self:onButtonPressed(self.onPressed)

self:onButtonRelease(self.onRelease)

else

if self.onPressed then

self:removeEventListenersByEvent(UIButton.PRESSED_EVENT)

self.onPressed = nil

end

if self.onRelease then

self:removeEventListenersByEvent(UIButton.RELEASE_EVENT)

self.onRelease = nil

end

我用起来是全局的

在载入ccs之后,会遍历所有节点,找出node.__cname == “UIPushButton”的元素,然后UIButtonEx.extend(node); node:setPressedActionEnabled(true)就可以了

需要按钮放大的,把0.9改成1.1就行了

之前精灵变灰都用的是别人写的一个GraySprite,实在是有很多局限

后来有个需求是要让CCControlButton在不传disable状态图片的时候,自动把normal的图片变灰

查阅多方资料后,终于把问题搞定

在cocos2dx/shaders目录下新建一个ccShader_PositionTextureGray_frag.h

#ifndef cocos2dx_ccShader_PositionTextureGray_frag_h
#define cocos2dx_ccShader_PositionTextureGray_frag_h
"                                           n
#ifdef GL_ES                                n
precision mediump float;                    n
#endif                                      n
n
uniform sampler2D u_texture;                n
varying vec2 v_texCoord;                    n
varying vec4 v_fragmentColor;               n
n
void main(void)                             n
{                                           n
// Convert to greyscale using NTSC weightings               n
vec4 col = texture2D(u_texture, v_texCoord);                n
float grey = dot(col.rgb, vec3(0.299, 0.587, 0.114));       n
gl_FragColor = vec4(grey, grey, grey, col.a);               n
}                                           n
";

#endif

#ifndef cocos2dx_ccShader_PositionTextureGray_frag_h

#define cocos2dx_ccShader_PositionTextureGray_frag_h

" n

#ifdef GL_ES n

precision mediump float; n

#endif n

uniform sampler2D u_texture; n

varying vec2 v_texCoord; n

varying vec4 v_fragmentColor; n

void main(void) n

{ n

// Convert to greyscale using NTSC weightings n

vec4 col = texture2D(u_texture, v_texCoord); n

float grey = dot(col.rgb, vec3(0.299, 0.587, 0.114)); n

gl_FragColor = vec4(grey, grey, grey, col.a); n

} n

#endif

找到ccShaders.h,在最后加上

C++

extern CC_DLL const GLchar * ccPositionTextureGray_frag;

1

extern CC_DLL const GLchar * ccPositionTextureGray_frag;
找到ccShaders.cpp,在最后加上

C++

const GLchar * ccPositionTextureGray_frag = #include "ccShader_PositionTextureGray_frag.h"

1
2

const GLchar * ccPositionTextureGray_frag =
#include "ccShader_PositionTextureGray_frag.h"
找到CCGLProgram.h在enum后面的define后加上

C++

#define kCCShader_PositionTextureGray "ShaderPositionTextureGray"

1

#define kCCShader_PositionTextureGray "ShaderPositionTextureGray"

找到CCShaderCache.cpp,在开头enum的最后加上kCCShaderType_PositionTextureGray

enum {
    kCCShaderType_PositionTextureColor,
    kCCShaderType_PositionTextureColorAlphaTest,
    kCCShaderType_PositionColor,
    kCCShaderType_PositionTexture,
    kCCShaderType_PositionTexture_uColor,
    kCCShaderType_PositionTextureA8Color,
    kCCShaderType_Position_uColor,
    kCCShaderType_PositionLengthTexureColor,
    kCCShaderType_PositionTextureGray,//add this

    kCCShaderType_MAX,
};

enum {

kCCShaderType_PositionTextureColor,

kCCShaderType_PositionTextureColorAlphaTest,

kCCShaderType_PositionColor,

kCCShaderType_PositionTexture,

kCCShaderType_PositionTexture_uColor,

kCCShaderType_PositionTextureA8Color,

kCCShaderType_Position_uColor,

kCCShaderType_PositionLengthTexureColor,

kCCShaderType_PositionTextureGray,//add this

kCCShaderType_MAX,

};

继续在CCShaderCache.cpp的loadDefaultShaders()最后添加

//
// Position Texture Gray shader
//
p = new CCGLProgram();
loadDefaultShader(p, kCCShaderType_PositionTextureGray);

m_pPrograms->setObject(p, kCCShader_PositionTextureGray);
p->release();

// Position Texture Gray shader

p = new CCGLProgram();

loadDefaultShader(p, kCCShaderType_PositionTextureGray);

m_pPrograms->setObject(p, kCCShader_PositionTextureGray);

p->release();

继续在CCShaderCache.cpp的reloadDefaultShaders()最后添加

C++

// Position Texture Gray shader p = programForKey(kCCShader_PositionTextureGray); p->reset(); loadDefaultShader(p, kCCShaderType_PositionTextureGray);

1
2
3
4

// Position Texture Gray shader
p = programForKey(kCCShader_PositionTextureGray);
p->reset();
loadDefaultShader(p, kCCShaderType_PositionTextureGray);

继续在CCShaderCache.cpp的loadDefaultShader(CCGLProgram *p, int type)最后添加一个case条件

case kCCShaderType_PositionTextureGray:
    p->initWithVertexShaderByteArray(ccPositionTextureColor_vert, ccPositionTextureGray_frag);
    
    p->addAttribute(kCCAttributeNamePosition, kCCVertexAttrib_Position);
    p->addAttribute(kCCAttributeNameColor, kCCVertexAttrib_Color);
    p->addAttribute(kCCAttributeNameTexCoord, kCCVertexAttrib_TexCoords);
    
    break;

case kCCShaderType_PositionTextureGray:

p->initWithVertexShaderByteArray(ccPositionTextureColor_vert, ccPositionTextureGray_frag);

p->addAttribute(kCCAttributeNamePosition, kCCVertexAttrib_Position);

p->addAttribute(kCCAttributeNameColor, kCCVertexAttrib_Color);

p->addAttribute(kCCAttributeNameTexCoord, kCCVertexAttrib_TexCoords);

break;

新建一个ColorUtils.h

#ifndef __COLOR_UTILS_H__
#define __COLOR_UTILS_H__

#include "cocos2d.h"
USING_NS_CC;

class ColorUtils
{
public:
    ColorUtils();
    ~ColorUtils();
    
    static void addGray(CCSprite *sp);
    static void removeGray(CCSprite *sp);
    
    static void addGray(CCSpriteBatchNode *sp);
    static void removeGray(CCSpriteBatchNode *sp);
    
private:
    
};

#endif

#ifndef __COLOR_UTILS_H__

#define __COLOR_UTILS_H__

#include "cocos2d.h"

USING_NS_CC;

class ColorUtils

{

public:

ColorUtils();

~ColorUtils();

static void addGray(CCSprite *sp);

static void removeGray(CCSprite *sp);

static void addGray(CCSpriteBatchNode *sp);

static void removeGray(CCSpriteBatchNode *sp);

private:

};

#endif

新建一个ColorUtils.cpp

#include "ColorUtils.h"

ColorUtils::ColorUtils()
{
}

ColorUtils::~ColorUtils()
{
}

void ColorUtils::addGray(CCSprite* sp)
{
    do
    {
        CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureGray);
        sp->setShaderProgram(pProgram);
        CHECK_GL_ERROR_DEBUG();
    } while (0);
}
void ColorUtils::removeGray(CCSprite* sp)
{
    do
    {
        CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor);
        sp->setShaderProgram(pProgram);
        CHECK_GL_ERROR_DEBUG();
    } while (0);
}
void ColorUtils::addGray(CCSpriteBatchNode* sp)
{
    do
    {
        CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureGray);
        sp->setShaderProgram(pProgram);
        CHECK_GL_ERROR_DEBUG();
    } while (0);
}
void ColorUtils::removeGray(CCSpriteBatchNode* sp)
{
    do
    {
        CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor);
        sp->setShaderProgram(pProgram);
        CHECK_GL_ERROR_DEBUG();
    } while (0);
}

#include "ColorUtils.h"

ColorUtils::ColorUtils()

{

}

ColorUtils::~ColorUtils()

{

}

void ColorUtils::addGray(CCSprite* sp)

{

CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureGray);

sp->setShaderProgram(pProgram);

CHECK_GL_ERROR_DEBUG();

} while (0);

}

void ColorUtils::removeGray(CCSprite* sp)

{

CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor);

sp->setShaderProgram(pProgram);

CHECK_GL_ERROR_DEBUG();

} while (0);

}

void ColorUtils::addGray(CCSpriteBatchNode* sp)

{

CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureGray);

sp->setShaderProgram(pProgram);

CHECK_GL_ERROR_DEBUG();

} while (0);

}

void ColorUtils::removeGray(CCSpriteBatchNode* sp)

{

CCGLProgram* pProgram = CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor);

sp->setShaderProgram(pProgram);

CHECK_GL_ERROR_DEBUG();

} while (0);

}

使用
对于CCSprite

C++

CCSprite *sp = CCSprite::create("demo.png"); ColorUtils::addGray(sp);

1
2

CCSprite *sp = CCSprite::create("demo.png");
ColorUtils::addGray(sp);

对于CCScale9Sprite

C++

CCSpriteBatchNode *sp = (CCSpriteBatchNode*)scale9sprite->getChildren()->objectAtIndex(0); ColorUtils::addGray(sp);

1
2

CCSpriteBatchNode *sp = (CCSpriteBatchNode*)scale9sprite->getChildren()->objectAtIndex(0);
ColorUtils::addGray(sp);

remove亦然

来自于CocosCodeIDE技术交流群”文件夹”同学

function darkNode(node)


 local vertDefaultSource = "n"..
                           "attribute vec4 a_position; n" ..
                           "attribute vec2 a_texCoord; n" ..
                           "attribute vec4 a_color; n"..                                                    
                           "#ifdef GL_ES  n"..
                           "varying lowp vec4 v_fragmentColor;n"..
                           "varying mediump vec2 v_texCoord;n"..
                           "#else                      n" ..
                           "varying vec4 v_fragmentColor; n" ..
                           "varying vec2 v_texCoord;  n"..
                           "#endif    n"..
                           "void main() n"..
                           "{n" ..
                            "gl_Position = CC_PMatrix * a_position; n"..
                           "v_fragmentColor = a_color;n"..
                           "v_texCoord = a_texCoord;n"..
                           "}"
        
    local pszFragSource = "#ifdef GL_ES n" ..
                          "precision mediump float; n" ..
                            "#endif n" ..
                            "varying vec4 v_fragmentColor; n" ..
                            "varying vec2 v_texCoord; n" ..
                            "void main(void) n" ..
                            "{ n" ..
                             "vec4 c = texture2D(CC_Texture0, v_texCoord); n" ..
                            "gl_FragColor.xyz = vec3(0.4*c.r + 0.4*c.g +0.4*c.b); n"..
                            "gl_FragColor.w = c.w; n"..
                            "}"

    local pProgram = cc.GLProgram:createWithByteArrays(vertDefaultSource,pszFragSource)
    
    pProgram:bindAttribLocation(cc.ATTRIBUTE_NAME_POSITION,cc.VERTEX_ATTRIB_POSITION)
    pProgram:bindAttribLocation(cc.ATTRIBUTE_NAME_COLOR,cc.VERTEX_ATTRIB_COLOR)
    pProgram:bindAttribLocation(cc.ATTRIBUTE_NAME_TEX_COORD,cc.VERTEX_ATTRIB_FLAG_TEX_COORDS)
    pProgram:link()
    pProgram:updateUniforms()
    node:setGLProgram(pProgram)
    
end

function darkNode(node)

local vertDefaultSource = "n"..

"attribute vec4 a_position; n" ..

"attribute vec2 a_texCoord; n" ..

"attribute vec4 a_color; n"..

"#ifdef GL_ES n"..

"varying lowp vec4 v_fragmentColor;n"..

"varying mediump vec2 v_texCoord;n"..

"#else n" ..

"varying vec4 v_fragmentColor; n" ..

"varying vec2 v_texCoord; n"..

"#endif n"..

"void main() n"..

"{n" ..

"gl_Position = CC_PMatrix * a_position; n"..

"v_fragmentColor = a_color;n"..

"v_texCoord = a_texCoord;n"..

"}"

local pszFragSource = "#ifdef GL_ES n" ..

"precision mediump float; n" ..

"#endif n" ..

"varying vec4 v_fragmentColor; n" ..

"varying vec2 v_texCoord; n" ..

"void main(void) n" ..

"{ n" ..

"vec4 c = texture2D(CC_Texture0, v_texCoord); n" ..

"gl_FragColor.xyz = vec3(0.4*c.r + 0.4*c.g +0.4*c.b); n"..

"gl_FragColor.w = c.w; n"..

"}"

local pProgram = cc.GLProgram:createWithByteArrays(vertDefaultSource,pszFragSource)

pProgram:bindAttribLocation(cc.ATTRIBUTE_NAME_POSITION,cc.VERTEX_ATTRIB_POSITION)

pProgram:bindAttribLocation(cc.ATTRIBUTE_NAME_COLOR,cc.VERTEX_ATTRIB_COLOR)

pProgram:bindAttribLocation(cc.ATTRIBUTE_NAME_TEX_COORD,cc.VERTEX_ATTRIB_FLAG_TEX_COORDS)

pProgram:link()

pProgram:updateUniforms()

node:setGLProgram(pProgram)

end

这个需求来自于工作中的一个需求

两个城池之间的路径是美术事先画好的,武将需要沿着画好的曲线行进

经过查找资料,发现了这篇文章

用到了下面这个公式：
阶贝塞尔曲线可如下推断。给定点P0、P1、…、Pn，其贝塞尔曲线即
$贝塞尔曲线公式$ 高阶曲线为建构高阶曲线，便需要相应更多的中介点。对于三次曲线，可由线性贝塞尔曲线描述的中介点Q0、Q1、Q2，和由二次曲线描述的点R0、R1所建构：
三次贝塞尔曲线

对于四次曲线，可由线性贝塞尔曲线描述的中介点Q0、Q1、Q2、Q3，由二次贝塞尔曲线描述的点R0、R1、R2，和由三次贝塞尔曲线描述的点S0、S1所建构：
四次贝塞尔曲线

更复杂的:
五次贝塞尔曲线

参考资料

以下为lua的实现方式,参考了上文中的c++算法,并没有考虑在极为高阶的情况下的性能问题

代码基于quick-cocos2d-x 2.2.5编写(谁叫他快呢)

--
-- Author: superyyl
-- Date: 2014-08-22 17:31:48
--
tool = {}


-- float to int
function tool.toint(n)
    local s = tostring(n)
    local i, j = s:find('%.')
    if i then
        return tonumber(s:sub(1, i-1))
    else
        return n
    end
end

-- 获取在ccnode屏幕的位置
function tool.getPositionInScreen(node)
    if not node then
        return 0,0
    end

    local x,y = node:getPosition()
    local parent = node:getParent()

    while parent do
       local px,py = parent:getPosition()
       if not parent:isIgnoreAnchorPointForPosition() then
           local anchorPoint = parent:getAnchorPointInPoints()
           px = px - anchorPoint.x
           py = py - anchorPoint.y
       end

        x =x + px
        y = y + py
       parent = parent:getParent()
    end

    return x, y
end

-- 检查触摸x,y是否在摸个node上
function tool.checkIfTouch(sprite, x, y)
    if not sprite then
        return false
    end

    local px, py = tool.getPositionInScreen(sprite)
    local anchorPoint = sprite:getAnchorPointInPoints()
    local px = px - anchorPoint.x
    local py = py - anchorPoint.y
    local w = sprite:getContentSize().width
    local h  = sprite:getContentSize().height
    local boundingBox = CCRect:new(px,py,w,h)
    if boundingBox:containsPoint(ccp(x,y)) then
        return true
    else
        return false
    end
end

--阶乘
function factorial(n)
    local result = 1
    for i=1,n,1 do
        result = result * i
    end
    return result
end

--杨辉三角
function pascalTriangleRatio(n,i)
    return factorial(n)/(factorial(i)*factorial(n-i))
end

--x的y次幂
function powf(x,y)
    if y == 0 then return 1 end
    local result = 1
    for i=1,y,1 do
        result = result * x
    end
    return result
end

--贝塞尔
--[[
    @param p 控制点table
    @param t
]]
function bezieerat(p,t)
    local px,py = 0,0
    local n = #p - 1
    for i=0,n do
        local ratio = pascalTriangleRatio(n,i)
        px = px + ratio * p[i+1].x * powf(t,i) * powf(1-t, n-i)
        py = py + ratio * p[i+1].y * powf(t,i) * powf(1-t, n-i)
    end
    return ccp(px,py)
end

100

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-- Author: superyyl

-- Date: 2014-08-22 17:31:48

tool = {}

-- float to int

function tool.toint(n)

local s = tostring(n)

local i, j = s:find('%.')

if i then

return tonumber(s:sub(1, i-1))

else

return n

end

-- 获取在ccnode屏幕的位置

function tool.getPositionInScreen(node)

if not node then

return 0,0

end

local x,y = node:getPosition()

local parent = node:getParent()

while parent do

local px,py = parent:getPosition()

if not parent:isIgnoreAnchorPointForPosition() then

local anchorPoint = parent:getAnchorPointInPoints()

px = px - anchorPoint.x

py = py - anchorPoint.y

end

x =x + px

y = y + py

parent = parent:getParent()

end

return x, y

end

-- 检查触摸x,y是否在摸个node上

function tool.checkIfTouch(sprite, x, y)

if not sprite then

return false

end

local px, py = tool.getPositionInScreen(sprite)

local anchorPoint = sprite:getAnchorPointInPoints()

local px = px - anchorPoint.x

local py = py - anchorPoint.y

local w = sprite:getContentSize().width

local h = sprite:getContentSize().height

local boundingBox = CCRect:new(px,py,w,h)

if boundingBox:containsPoint(ccp(x,y)) then

return true

else

return false

end

--阶乘

function factorial(n)

local result = 1

for i=1,n,1 do

result = result * i

end

return result

end

--杨辉三角

function pascalTriangleRatio(n,i)

return factorial(n)/(factorial(i)*factorial(n-i))

end

--x的y次幂

function powf(x,y)

if y == 0 then return 1 end

local result = 1

for i=1,y,1 do

result = result * x

end

return result

end

--贝塞尔

--[[

@param p 控制点table

@param t

]]

function bezieerat(p,t)

local px,py = 0,0

local n = #p - 1

for i=0,n do

local ratio = pascalTriangleRatio(n,i)

px = px + ratio * p[i+1].x * powf(t,i) * powf(1-t, n-i)

py = py + ratio * p[i+1].y * powf(t,i) * powf(1-t, n-i)

end

return ccp(px,py)

end

--
-- Author: superyyl
-- Date: 2014-08-27 11:44:08
--
local General = class("General",function()
	return display.newSprite("res/ui/circle.png")
end)

General.STATE = {
	IDLE = 0,
	MOVE = 1
}

function General:ctor()
	self:registerScriptHandler(function(e)
		if e == "enter" then
			self:onEnter()
		elseif e == "exit" then
			self:onExit()
		end
	end)
	self.state = General.STATE.IDLE
end

function General:startAction(p,t)
	self.controlPos = {}
	self.totalTime = t
	self.state = General.STATE.MOVE

	for idx,pos in pairs(p) do
		local newPos = ccp(pos.x,pos.y)
		self.controlPos[#self.controlPos+1] = newPos
	end

	self.number = #self.controlPos
	self.t = 0
end

function General:update(dt)
	if self.state == General.STATE.MOVE then
		self.t = self.t + dt
		local p = bezieerat(self.controlPos, self.t/self.totalTime)
		self:setPosition(p)
		if self.t > self.totalTime then
			self.state = General.STATE.IDLE
			self:startAction(self.controlPos, self.totalTime)
		end
	end
end

function General:onEnter()
	self.updateSchedulerEntry = CCDirector:sharedDirector():getScheduler():scheduleScriptFunc(handler(self,self.update), 0, false)
end

function General:onExit()
	if self.updateSchedulerEntry then
		CCDirector:sharedDirector():getScheduler():unscheduleScriptEntry(self.updateSchedulerEntry)
	end
end

return General

-- Author: superyyl

-- Date: 2014-08-27 11:44:08

local General = class("General",function()

return display.newSprite("res/ui/circle.png")

end)

General.STATE = {

IDLE = 0,

MOVE = 1

}

function General:ctor()

self:registerScriptHandler(function(e)

if e == "enter" then

self:onEnter()

elseif e == "exit" then

self:onExit()

end

end)

self.state = General.STATE.IDLE

end

function General:startAction(p,t)

self.controlPos = {}

self.totalTime = t

self.state = General.STATE.MOVE

for idx,pos in pairs(p) do

local newPos = ccp(pos.x,pos.y)

self.controlPos[#self.controlPos+1] = newPos

end

self.number = #self.controlPos

self.t = 0

end

function General:update(dt)

if self.state == General.STATE.MOVE then

self.t = self.t + dt

local p = bezieerat(self.controlPos, self.t/self.totalTime)

self:setPosition(p)

if self.t > self.totalTime then

self.state = General.STATE.IDLE

self:startAction(self.controlPos, self.totalTime)

end

function General:onEnter()

self.updateSchedulerEntry = CCDirector:sharedDirector():getScheduler():scheduleScriptFunc(handler(self,self.update), 0, false)

end

function General:onExit()

if self.updateSchedulerEntry then

CCDirector:sharedDirector():getScheduler():unscheduleScriptEntry(self.updateSchedulerEntry)

end

return General

--
-- Author: superyyl
-- Date: 2014-08-27 10:20:02
--
local TestScene = class("TestScene", function()
	return display.newScene("TestScene")
end)

function TestScene:ctor()
	
	self.layer = CCLayerColor:create(ccc4(255, 255, 255, 255))
	self:addChild(self.layer)

	self.pos = {}
	self.points = {}

	self.layer:registerScriptTouchHandler(handler(self,self.onTouch), false)
	self.layer:setTouchEnabled(true)

	local delete = CCControlButton:create(
		CCLabelTTF:create("删除最后一个节点", "Thonburi", 24),
		CCScale9Sprite:create("res/ui/btn_default_normal.png")
	)
	delete:setPreferredSize(CCSize(200, 80))
	delete:setPosition(120,display.height-60)
	delete:addHandleOfControlEvent(
		handler(self,self.onDeleteClick),
		CCControlEventTouchUpInside
	)
	self:addChild(delete)


end

function TestScene:onDeleteClick()
	table.remove(self.pos,#self.pos)
	self:refresh()
end

function TestScene:onTouch(e,x,y)
	if e == "began" then
		self.touchLocation = ccp(x,y)
		self.dragPoint = nil
		self.dragIndex = nil
		for idx,point in pairs(self.points) do
			if tool.checkIfTouch(point,x,y) then
				self.dragPoint = point
				self.dragIndex = idx
				print("self.dragIndex",self.dragIndex)
			end
		end
		return true
	elseif e == "moved" then
		if self.dragPoint then
			local sprite = self.dragPoint
			local pos = ccp(sprite:getPositionX()+x-self.touchLocation.x,sprite:getPositionY()+y-self.touchLocation.y)
			self.dragPoint:setPosition(pos)
			self.touchLocation = ccp(x,y)
		end
	elseif e == "ended" then
		if self.dragPoint then
			self.pos[self.dragIndex] = ccp(x,y)
			self.dragPoint = nil
			self.dragIndex = nil
			
			self:refresh()
		else
			local pos = ccp(x,y)
			local distance = ccpDistance(self.touchLocation, pos)
			if distance < 25 then
				self.pos[#self.pos+1] = pos
			end
			self:refresh()
		end
	end
end

function TestScene:refresh()
	self.layer:removeAllChildrenWithCleanup(true)
	self.points = {}
	for i,pos in pairs(self.pos) do
		local point = CCSprite:create("res/ui/point.png")
		point:setPosition(pos)
		self.layer:addChild(point)
		local label = CCLabelTTF:create(tostring(i), "Thonburi", 20)
		label:setColor(ccc3(0, 0, 0))
		label:setPosition(point:getContentSize().width/2,point:getContentSize().height+10)
		point:addChild(label)
		self.points[#self.points+1] = point
	end

	if #self.pos > 1 then
		self.general = require("app.models.General").new()
		self.general:setPosition(self.pos[1])
		self.layer:addChild(self.general)
		self.general:startAction(self.pos, 4)



		local controlPos = {}
		for idx,pos in pairs(self.pos) do
			local newPos = ccp(pos.x,pos.y)
			controlPos[#controlPos+1] = newPos
		end


		local node = CCDrawNode:create()
		self.layer:addChild(node)

		local tracePoints = {}
		for t=0,1,0.001 do
			local point = bezieerat(controlPos, t)
			node:drawDot(point, 2, ccc4f(0, 255, 0, 128))
			tracePoints[#tracePoints+1] = {}
			tracePoints[#tracePoints].point = point
			tracePoints[#tracePoints].percent = t
		end

		local distance = 0
		for i=1,#tracePoints-1,1 do
			local p1 = tracePoints[i]
			local p2 = tracePoints[i+1]
			local d = ccpDistance(p1.point, p2.point)
			distance = distance + d
		end

		local len = 30
		local pointInfo = {}
		local count = tool.toint(distance / len)
		local mod = distance % len
		len = len + mod / count

		pointInfo[1] = tracePoints[1]
		local remain = len
		for i=1,#tracePoints-1,1 do
			local p1 = tracePoints[i]
			local p2 = tracePoints[i+1]
			local d = ccpDistance(p1.point, p2.point)
			remain = remain - d
			if remain <= 0 then
				pointInfo[#pointInfo+1] = p2
				remain = remain + len
			end
		end

		for idx,p in pairs(pointInfo) do
			local point = CCSprite:create("res/ui/trace.png")
			point:setPosition(p.point)
			print("percent:"..p.percent)
			self.layer:addChild(point)
		end


		print(string.format("长度:%s#%s#%s#%s",distance,count,mod,len))

	end
end

return TestScene

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-- Author: superyyl

-- Date: 2014-08-27 10:20:02

local TestScene = class("TestScene", function()

return display.newScene("TestScene")

end)

function TestScene:ctor()

self.layer = CCLayerColor:create(ccc4(255, 255, 255, 255))

self:addChild(self.layer)

self.pos = {}

self.points = {}

self.layer:registerScriptTouchHandler(handler(self,self.onTouch), false)

self.layer:setTouchEnabled(true)

local delete = CCControlButton:create(

CCLabelTTF:create("删除最后一个节点", "Thonburi", 24),

CCScale9Sprite:create("res/ui/btn_default_normal.png")

)

delete:setPreferredSize(CCSize(200, 80))

delete:setPosition(120,display.height-60)

delete:addHandleOfControlEvent(

handler(self,self.onDeleteClick),

CCControlEventTouchUpInside

)

self:addChild(delete)

end

function TestScene:onDeleteClick()

table.remove(self.pos,#self.pos)

self:refresh()

end

function TestScene:onTouch(e,x,y)

if e == "began" then

self.touchLocation = ccp(x,y)

self.dragPoint = nil

self.dragIndex = nil

for idx,point in pairs(self.points) do

if tool.checkIfTouch(point,x,y) then

self.dragPoint = point

self.dragIndex = idx

print("self.dragIndex",self.dragIndex)

end

return true

elseif e == "moved" then

if self.dragPoint then

local sprite = self.dragPoint

local pos = ccp(sprite:getPositionX()+x-self.touchLocation.x,sprite:getPositionY()+y-self.touchLocation.y)

self.dragPoint:setPosition(pos)

self.touchLocation = ccp(x,y)

end

elseif e == "ended" then

if self.dragPoint then

self.pos[self.dragIndex] = ccp(x,y)

self.dragPoint = nil

self.dragIndex = nil

self:refresh()

else

local pos = ccp(x,y)

local distance = ccpDistance(self.touchLocation, pos)

if distance < 25 then

self.pos[#self.pos+1] = pos

end

self:refresh()

end

function TestScene:refresh()

self.layer:removeAllChildrenWithCleanup(true)

self.points = {}

for i,pos in pairs(self.pos) do

local point = CCSprite:create("res/ui/point.png")

point:setPosition(pos)

self.layer:addChild(point)

local label = CCLabelTTF:create(tostring(i), "Thonburi", 20)

label:setColor(ccc3(0, 0, 0))

label:setPosition(point:getContentSize().width/2,point:getContentSize().height+10)

point:addChild(label)

self.points[#self.points+1] = point

end

if #self.pos > 1 then

self.general = require("app.models.General").new()

self.general:setPosition(self.pos[1])

self.layer:addChild(self.general)

self.general:startAction(self.pos, 4)

local controlPos = {}

for idx,pos in pairs(self.pos) do

local newPos = ccp(pos.x,pos.y)

controlPos[#controlPos+1] = newPos

end

local node = CCDrawNode:create()

self.layer:addChild(node)

local tracePoints = {}

for t=0,1,0.001 do

local point = bezieerat(controlPos, t)

node:drawDot(point, 2, ccc4f(0, 255, 0, 128))

tracePoints[#tracePoints+1] = {}

tracePoints[#tracePoints].point = point

tracePoints[#tracePoints].percent = t

end

local distance = 0

for i=1,#tracePoints-1,1 do

local p1 = tracePoints[i]

local p2 = tracePoints[i+1]

local d = ccpDistance(p1.point, p2.point)

distance = distance + d

end

local len = 30

local pointInfo = {}

local count = tool.toint(distance / len)

local mod = distance % len

len = len + mod / count

pointInfo[1] = tracePoints[1]

local remain = len

for i=1,#tracePoints-1,1 do

local p1 = tracePoints[i]

local p2 = tracePoints[i+1]

local d = ccpDistance(p1.point, p2.point)

remain = remain - d

if remain <= 0 then

pointInfo[#pointInfo+1] = p2

remain = remain + len

end

for idx,p in pairs(pointInfo) do

local point = CCSprite:create("res/ui/trace.png")

point:setPosition(p.point)

print("percent:"..p.percent)

self.layer:addChild(point)

end

print(string.format("长度:%s#%s#%s#%s",distance,count,mod,len))

end

return TestScene

最后放一张效果图

一般情况下,我们使用sprite->getBoundingBox()->containsPoint(touchLocation)来判断是否触摸到了一个精灵.

需求是万变的,经常需求要求我们触摸时判断一个不规则图形

CCRenderTexture* render = CCRenderTexture::create(CCDirector::sharedDirector()->getWinSize().width, CCDirector::sharedDirector()->getWinSize().height);
render->begin();
sprite->visit();
GLubyte pColor[4];
glReadPixels(location.x,location.y,1,1,GL_RGBA,GL_UNSIGNED_BYTE,&pColor[0]);
if (pColor[3] != 0) {
    render->end();
    return false;
}
render->end();
return true;

CCRenderTexture* render = CCRenderTexture::create(CCDirector::sharedDirector()->getWinSize().width, CCDirector::sharedDirector()->getWinSize().height);

render->begin();

sprite->visit();

GLubyte pColor[4];

glReadPixels(location.x,location.y,1,1,GL_RGBA,GL_UNSIGNED_BYTE,&pColor[0]);

if (pColor[3] != 0) {

render->end();

return false;

}

render->end();

return true;

爱好玩

Stay Hungry, Stay Foolish.

Tag Archives: cocos2dx

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