From b1bd5e49497f8c6dbf4c1e9878976b1e79995625 Mon Sep 17 00:00:00 2001
From: Ryan Schmidt <rms@rms80.com>
Date: Sat, 30 Jun 2018 00:30:23 -0400
Subject: [PATCH] large mesh handling

---
 platform/fMesh.cs | 3 +++
 util/UnityUtil.cs | 5 +++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/platform/fMesh.cs b/platform/fMesh.cs
index 4c32936..82e4428 100644
--- a/platform/fMesh.cs
+++ b/platform/fMesh.cs
@@ -40,6 +40,9 @@ public fMesh(int[] triangles, DMesh3 source, int[] source_vertices, bool bCopyNo
 
             Mesh m = new Mesh();
             m.vertices = vertices;
+
+            if (NV > 65000 || triangles.Length/3 > 65000)
+                m.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
             m.triangles = triangles;
 
             if (bCopyNormals && source.HasVertexNormals) {
diff --git a/util/UnityUtil.cs b/util/UnityUtil.cs
index f0c7cb1..e6cf784 100644
--- a/util/UnityUtil.cs
+++ b/util/UnityUtil.cs
@@ -468,7 +468,7 @@ public static UnityEngine.Mesh SimpleMeshToUnityMesh(SimpleMesh m, bool bSwapLef
 
 
 
-        public static fMesh DMeshToUnityMesh(DMesh3 m, bool bSwapLeftRight, bool bAllowLargeMeshes = false)
+        public static fMesh DMeshToUnityMesh(DMesh3 m, bool bSwapLeftRight, bool bAllowLargeMeshes = false, bool bRecalcNormalsIfMissing = true)
         {
             if (bSwapLeftRight)
                 throw new Exception("[RMSNOTE] I think this conversion is wrong, see MeshTransforms.SwapLeftRight. Just want to know if this code is ever hit.");
@@ -514,8 +514,9 @@ public static fMesh DMeshToUnityMesh(DMesh3 m, bool bSwapLeftRight, bool bAllowL
                 unityMesh.triangles = triangles;
             }
 
-            if (m.HasVertexNormals == false)
+            if (m.HasVertexNormals == false && bRecalcNormalsIfMissing) {
                 unityMesh.RecalculateNormals();
+            }
 
             return new fMesh(unityMesh);
         }