1 files changed, 52 insertions, 0 deletions
diff --git a/RTPObjExporter.cs b/RTPObjExporter.cs
new file mode 100644
index 0000000..791de73
--- /dev/null
+++ b/RTPObjExporter.cs
@@ -0,0 +1,52 @@
+using System.IO;
+using System.Text;
+using UnityEngine;
+
+public class RTPObjExporter
+{
+	public static string MeshToString(MeshFilter mf)
+	{
+		Mesh sharedMesh = mf.sharedMesh;
+		Material[] sharedMaterials = mf.GetComponent<Renderer>().sharedMaterials;
+		StringBuilder stringBuilder = new StringBuilder();
+		stringBuilder.Append("g ").Append(mf.name).Append("\n");
+		Vector3[] vertices = sharedMesh.vertices;
+		for (int i = 0; i < vertices.Length; i++)
+		{
+			Vector3 vector = vertices[i];
+			stringBuilder.Append($"v {0f - vector.x} {vector.y} {vector.z}\n");
+		}
+		stringBuilder.Append("\n");
+		Vector3[] normals = sharedMesh.normals;
+		for (int j = 0; j < normals.Length; j++)
+		{
+			Vector3 vector2 = normals[j];
+			stringBuilder.Append($"vn {0f - vector2.x} {vector2.y} {vector2.z}\n");
+		}
+		stringBuilder.Append("\n");
+		Vector2[] uv = sharedMesh.uv;
+		for (int k = 0; k < uv.Length; k++)
+		{
+			Vector3 vector3 = uv[k];
+			stringBuilder.Append($"vt {vector3.x} {vector3.y}\n");
+		}
+		for (int l = 0; l < sharedMesh.subMeshCount; l++)
+		{
+			stringBuilder.Append("\n");
+			stringBuilder.Append("usemtl ").Append(sharedMaterials[l].name).Append("\n");
+			stringBuilder.Append("usemap ").Append(sharedMaterials[l].name).Append("\n");
+			int[] triangles = sharedMesh.GetTriangles(l);
+			for (int m = 0; m < triangles.Length; m += 3)
+			{
+				stringBuilder.Append(string.Format("f {0}/{0}/{0} {1}/{1}/{1} {2}/{2}/{2}\n", triangles[m + 2] + 1, triangles[m + 1] + 1, triangles[m] + 1));
+			}
+		}
+		return stringBuilder.ToString();
+	}
+
+	public static void MeshToFile(MeshFilter mf, string filename)
+	{
+		using StreamWriter streamWriter = new StreamWriter(filename);
+		streamWriter.Write(MeshToString(mf));
+	}
+}