static string MeshToString(Mesh mesh)
{
var vertices = mesh.vertices;
var indices = mesh.triangles;
var triangleCount = mesh.triangles.Length;
// convert into sharpnav Vector3 array
SharpNav.Geometry.Vector3[] navVerts = new SharpNav.Geometry.Vector3[vertices.Length];
for (int i = 0, length = vertices.Length; i < length; i++)
{
navVerts[i] = ToSharpVector(vertices[i]);
//if(i<length-1)
// Debug.DrawLine(vertices[i], vertices[i+1], Color.red, 99);
}
//prepare the geometry from your mesh data
var tris = TriangleEnumerable.FromVector3(navVerts, 0, 1, vertices.Length / 3);
// check bounds
var bounds = tris.GetBoundingBox();
Debug.DrawLine(ToUnityVector(bounds.Min.Xzy), ToUnityVector(bounds.Max.Xzy), Color.red, 99);
//use the default generation settings
var settings = NavMeshGenerationSettings.Default;
settings.AgentHeight = 1.7f;
settings.AgentRadius = 0.6f;
//generate the mesh
var navMesh = SharpNav.NavMesh.Generate(tris, settings);
new NavMeshJsonSerializer().Serialize(@"d:\tmp\test.mesh", navMesh);
StringBuilder sb = new StringBuilder();
sb.Append("g ").Append(mesh.name).Append("\n");
foreach (Vector3 v in mesh.vertices)
{
sb.Append(string.Format("v {0} {1} {2}\n", v.x, v.y, v.z));
}
sb.Append("\n");
foreach (Vector3 v in mesh.normals)
{
sb.Append(string.Format("vn {0} {1} {2}\n", v.x, v.y, v.z));
}
sb.Append("\n");
foreach (Vector3 v in mesh.uv)
{
sb.Append(string.Format("vt {0} {1}\n", v.x, v.y));
}
for (int material = 0; material < mesh.subMeshCount; material++)
{
sb.Append("\n");
//sb.Append("usemtl ").Append(mats[material].name).Append("\n");
//sb.Append("usemap ").Append(mats[material].name).Append("\n");
int[] triangles = mesh.GetTriangles(material);
for (int i = 0; i < triangles.Length; i += 3)
{
sb.Append(string.Format("f {0}/{0}/{0} {1}/{1}/{1} {2}/{2}/{2}\n", triangles[i] + 1, triangles[i + 1] + 1, triangles[i + 2] + 1));
}
}
return(sb.ToString());
}
public static Vector3 ToUnityVector(SharpNav.Geometry.Vector3 vector)
{
return(new Vector3(vector.X, vector.Y, vector.Z));
}