omnet++ - What are the units of distance in the MiXiM based Veins simulation scenarios?

Question

Hello StackEx community.

I am running a scenario in Veins 3.0 where I am using the commandDistanceRequest()function to find out the distance between two nodes. I am getting values which, I suppose, is in the domain of the MiXiM - OMNeT++ simulation play-field.

My questions here are:

1. What is the unit of this distance returned by commandDistanceRequest()?

2. I know that OMNeT++ and SUMO use different sets of coordinate spaces. Is it different for both of them or only the coordinate space differs here?

Answer 1

1. 返回的单位commandDistanceRequest()是m（米）

链接：目前地理学中普遍使用两种坐标系：地理坐标系和矩形（也称为笛卡尔）坐标系。

2. SUMO 和 OMNeT++ 都使用笛卡尔坐标。然而，在 SUMO 中，y轴被翻转并且存在偏移。