新人求助！帮忙分析一下模型代码！

附件是agv小车多点搬运的模型，对于这个模型中优先级的公式double priority = 10000-(2*round(getlabelnum(item,"dj")/2)+1); 麻烦大神解答下！！
treenode dispatcher = centerobject(current,1); // the dispatcher or task executer
double priority = 10000-(2*round(getlabelnum(item,"dj")/2)+1); // read the Priority value on the GUI
int preempting = getvarnum(current,"preempttransport");