在做卡牌游戏的项目中,遇到了动画裁剪的问题。假如动画是一个圆形动画,在page1的页面中位置靠右,在page2中很可能会看到这个动画的另一半此时,就需要做动画做裁剪,在工程中有一个setScissorRect函数,可以对动画进行裁剪。
void play::PCBaseNode::setScissorRect(const CCRect & val )
{
scissorRect = val;
haveScissorRect = true;
scissorBoxRect = freshScissorBoxRect();
}
CCRect play::PCBaseNode::freshScissorBoxRect()
{
CCRect tempRect;
tempRect.origin = this->convertToWorldSpace(scissorRect.origin);
CCPoint sizeP = this->convertToWorldSpace(ccp(scissorRect.origin.x+scissorRect.size.width,scissorRect.origin.y+scissorRect.size.height));
tempRect.origin.x *= CC_CONTENT_SCALE_FACTOR();
tempRect.origin.y *= CC_CONTENT_SCALE_FACTOR();
tempRect.size.width = sizeP.x * CC_CONTENT_SCALE_FACTOR() – tempRect.origin.x;
tempRect.size.height = sizeP.y * CC_CONTENT_SCALE_FACTOR() – tempRect.origin.y;
/*
char buf[256];
sprintf(buf, “$$$node scissor: %.2f,%.2f;%.2f;%.2f”,tempRect.origin.x,tempRect.origin.y ,tempRect.size.width ,tempRect.size.height);
PCFileLogger* logger= AppInformation::getInstance()->getFileLogger(“debug”);
logger->emit(PC_LOG_DEBUG,buf);
CCLOG(buf);
*/
return tempRect;
}