From 7bf31dd46897f4fd590b9db275caeb42992ccd47 Mon Sep 17 00:00:00 2001
From: Tristan Schulz <mrdiverlp@gmail.com>
Date: Thu, 9 Sep 2021 18:14:15 +0200
Subject: [PATCH] Fixed loading obj models with no materials (#1984)

---
 src/models.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/src/models.c b/src/models.c
index 045cd16a..ab3d0dd0 100644
--- a/src/models.c
+++ b/src/models.c
@@ -3560,13 +3560,22 @@ static Model LoadOBJ(const char *fileName)
         model.meshMaterial = (int *)RL_CALLOC(model.meshCount, sizeof(int));
 
         // Count the faces for each material
-        int *matFaces = RL_CALLOC(materialCount, sizeof(int));
+        int *matFaces = RL_CALLOC(model.meshCount, sizeof(int));
 
-        for (int fi = 0; fi< attrib.num_faces; fi++)
+        // iff no materials are present use all faces on one mesh
+        if (materialCount > 0)
         {
-            //tinyobj_vertex_index_t face = attrib.faces[fi];
-            int idx = attrib.material_ids[fi];
-            matFaces[idx]++;
+            for (int fi = 0; fi< attrib.num_faces; fi++)
+            {
+                //tinyobj_vertex_index_t face = attrib.faces[fi];
+                int idx = attrib.material_ids[fi];
+                matFaces[idx]++;
+            }
+
+        }
+        else
+        {
+            matFaces[0] = attrib.num_faces;
         }
 
         //--------------------------------------
@@ -5606,4 +5615,4 @@ static Model LoadVOX(const char *fileName)
 
     return model;
 }
-#endif
\ No newline at end of file
+#endif