如何使用Cocos2d-JS引擎快速開發壹個微信遊戲

//a static method

Sprite* HelloWorld::maskedSpriteWithSprite(Sprite* textureSprite, Sprite* maskSprite)

{

// 1

RenderTexture * rt = RenderTexture::create( maskSprite->getContentSize().width,

maskSprite->getContentSize().height );

// 2

maskSprite->setPosition(maskSprite->getContentSize().width/2,

maskSprite->getContentSize().height/2);

textureSprite->setPosition(textureSprite->getContentSize().width/2,

textureSprite->getContentSize().height/2);

// 3

maskSprite->setBlendFunc( BlendFunc{GL_ONE, GL_ZERO} );

textureSprite->setBlendFunc( BlendFunc{GL_DST_ALPHA, GL_ZERO} );

// 4

rt->begin();

maskSprite->visit();

textureSprite->visit();

rt->end();

// 5

Sprite *retval = Sprite::createWithTexture(rt->getSprite()->getTexture());

retval->setFlippedY(true);

return retval;

}

..