public void Build()
{
if (fromUnityNavigation)
{
UnityEngine.AI.NavMeshTriangulation triangulatedNavMesh = UnityEngine.AI.NavMesh.CalculateTriangulation();
Mesh mesh = new Mesh();
mesh.name = "ExportedNavMesh";
mesh.vertices = triangulatedNavMesh.vertices;
mesh.triangles = triangulatedNavMesh.indices;
Mesh sourceMesh = mesh;
if (sourceMesh == null)
{
return;
}
ScanInternal(sourceMesh.triangles, sourceMesh.vertices);
}
else
{
AstarPathEditor.MenuScan();
Pathfinding.RecastGraph target = AstarPath.active.graphs[0] as Pathfinding.RecastGraph;
int[] triangles;
Vector3[] vertices;
GetRecastData(target, out triangles, out vertices);
ScanInternal(triangles, vertices);
}
}
public static void GetRecastData(Pathfinding.RecastGraph target, out int[] triangleArray, out Vector3[] vertexArray)
{
triangleArray = null;
vertexArray = null;
if (target == null)
{
return;
}
Pathfinding.RecastGraph.NavmeshTile[] tiles = target.GetTiles();
if (tiles == null)
{
if (EditorUtility.DisplayDialog("Scan graph before exporting?", "The graph does not contain any mesh data. Do you want to scan it?", "Ok", "Cancel"))
{
AstarPathEditor.MenuScan();
tiles = target.GetTiles();
if (tiles == null)
{
return;
}
}
else
{
return;
}
}
//string path = EditorUtility.SaveFilePanel("Export .obj", "", "navmesh.obj", "obj");
//if (path == "") return;
//Generate .obj
/*var sb = new System.Text.StringBuilder();
*
* string name = System.IO.Path.GetFileNameWithoutExtension(path);
*
* sb.Append("g ").Append(name).AppendLine();*/
List <Vector3> vertList = new List <Vector3>();
List <int> triangleList = new List <int>();
//Vertices start from 1
int vCount = 0;
//Define single texture coordinate to zero
//sb.Append("vt 0 0\n");
for (int t = 0; t < tiles.Length; t++)
{
Pathfinding.RecastGraph.NavmeshTile tile = tiles[t];
if (tile == null)
{
continue;
}
Pathfinding.Int3[] vertices = tile.verts;
//Write vertices
for (int i = 0; i < vertices.Length; i++)
{
var v = (Vector3)vertices[i];
//sb.Append(string.Format("v {0} {1} {2}\n", -v.x, v.y, v.z));
vertList.Add(v);
}
//Write triangles
Pathfinding.TriangleMeshNode[] nodes = tile.nodes;
for (int i = 0; i < nodes.Length; i++)
{
Pathfinding.TriangleMeshNode node = nodes[i];
if (node == null)
{
Debug.LogError("Node was null or no TriangleMeshNode. Critical error. Graph type " + target.GetType().Name);
return;
}
if (node.GetVertexArrayIndex(0) < 0 || node.GetVertexArrayIndex(0) >= vertices.Length)
{
throw new System.Exception("ERR");
}
//sb.Append(string.Format("f {0}/1 {1}/1 {2}/1\n", (node.GetVertexArrayIndex(0) + vCount), (node.GetVertexArrayIndex(1) + vCount), (node.GetVertexArrayIndex(2) + vCount)));
triangleList.Add(node.GetVertexArrayIndex(0) + vCount);
triangleList.Add(node.GetVertexArrayIndex(1) + vCount);
triangleList.Add(node.GetVertexArrayIndex(2) + vCount);
}
vCount += vertices.Length;
}
/*string obj = sb.ToString();
*
* using (var sw = new System.IO.StreamWriter(path))
* {
* sw.Write(obj);
* }*/
triangleArray = triangleList.ToArray();
vertexArray = vertList.ToArray();
}