NavTileHandle GoalDistanceEstimate 函数写的不对

[QiuleiWang]

float NavTileHandle::MapSearchNode::GoalDistanceEstimate(MapSearchNode &nodeGoal)
{
float xd = float(((float)x - (float)nodeGoal.x));
float yd = float(((float)y - (float)nodeGoal.y));
//源代码没加绝对值
return abs(xd) + abs(yd);
}