[LUA]cocos2dx中遮罩效果

原文http://cn.quick-x.com/?p=1539 是基于quick-x的

为了方便在我们工程中使用,我把它写成了cocos2dx的,并增加了吞噬事件的开关


function setShade(sprite,swallow)
    swallow = swallow or false
    local spriteCp = CCSprite:createWithSpriteFrame(sprite:displayFrame())
    spriteCp:setAnchorPoint(sprite:getAnchorPoint())
    spriteCp:setPosition(ccp(sprite:getPosition()))
    local b = ccBlendFunc:new()
    b.src = GL_ZERO
    b.dst = GL_ONE_MINUS_SRC_ALPHA
    spriteCp:setBlendFunc(b)
    local maskLayer = CCLayerColor:create(ccc4(0,0,0,255*0.7))
    local maskRt = CCRenderTexture:create(visibleSize.width, visibleSize.height)
    maskRt:setPosition(visibleSize.width/2, visibleSize.height/2)
    maskRt:begin()
    maskLayer:visit()
    spriteCp:visit()
    maskRt:endToLua()

    if swallow then
        local boundingBox = spriteCp:boundingBox()

        maskRt:setTouchEnabled(true)
        maskRt:registerScriptTouchHandler(function(e,x,y)
            log.info(&quot;touch&quot;,e,x,y)
            if boundingBox:containsPoint(ccp(x,y)) then

                return false
            end
            return true
        end,false,true)
    end
    return maskRt
end

function setShade(sprite,swallow)

swallow = swallow or false

local spriteCp = CCSprite:createWithSpriteFrame(sprite:displayFrame())

spriteCp:setAnchorPoint(sprite:getAnchorPoint())

spriteCp:setPosition(ccp(sprite:getPosition()))

local b = ccBlendFunc:new()

b.src = GL_ZERO

b.dst = GL_ONE_MINUS_SRC_ALPHA

spriteCp:setBlendFunc(b)

local maskLayer = CCLayerColor:create(ccc4(0,0,0,255*0.7))

local maskRt = CCRenderTexture:create(visibleSize.width, visibleSize.height)

maskRt:setPosition(visibleSize.width/2, visibleSize.height/2)

maskRt:begin()

maskLayer:visit()

spriteCp:visit()

maskRt:endToLua()

if swallow then

local boundingBox = spriteCp:boundingBox()

maskRt:setTouchEnabled(true)

maskRt:registerScriptTouchHandler(function(e,x,y)

log.info("touch",e,x,y)

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

return false

end

return true

end,false,true)

end

return maskRt

end

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[LUA]cocos2dx中遮罩效果

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