How to do it...

Even though this recipe is only defining a function, please take into consideration the comments in the code for better understanding of the implementation and code flow:

  1. Declare the GetPathDFS function:
public List<Vertex> GetPathDFS(GameObject srcObj, GameObject dstObj) 
{ 
    // next steps 
} 
  1. Establish whether input objects are null:
if (srcObj == null || dstObj == null) 
    return new List<Vertex>();
  1. Declare and initialize the variables we need for the algorithm:
Vertex src = GetNearestVertex(srcObj.transform.position); Vertex dst = GetNearestVertex(dstObj.transform.position); Vertex[] neighbours; Vertex v; int[] previous = new int[vertices.Count]; for (int i = 0; i < previous.Length; i++) previous[i] = -1; previous[src.id] ...

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