From 7ecaf74dd33cdbf2328b1a63ca292a1976cf49b9 Mon Sep 17 00:00:00 2001
From: Benau <Benau@users.noreply.github.com>
Date: Thu, 5 Jan 2023 11:15:50 +0800
Subject: [PATCH] Remove incorrect animation data in some b3d models, see #4829

---
 src/graphics/b3d_mesh_loader.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/graphics/b3d_mesh_loader.cpp b/src/graphics/b3d_mesh_loader.cpp
index 81243f486..38a50ae6e 100644
--- a/src/graphics/b3d_mesh_loader.cpp
+++ b/src/graphics/b3d_mesh_loader.cpp
@@ -142,13 +142,20 @@ SP::SPMesh* B3DMeshLoader::toSPM(scene::CSkinnedMesh* mesh)
             wi[b].push_back(core::array<JointInfluence>());
 	}
 
-    const bool skinned_mesh = !mesh->RootJoints.empty() &&
+    bool skinned_mesh = !mesh->RootJoints.empty() &&
         mesh->getFrameCount() > 0;
+    unsigned idx = 0;
     if (skinned_mesh)
     {
-        unsigned idx = 0;
         for (unsigned i = 0; i < mesh->RootJoints.size(); i++)
             computeWeightInfluence(mesh->RootJoints[i], idx, wi);
+    }
+    // Some b3d models has incorrect animation data, remove it and treat them
+    // as static mesh
+    if (idx == 0)
+        skinned_mesh = false;
+    if (skinned_mesh)
+    {
         spm->m_total_joints = idx;
         spm->m_joint_using = idx;
         spm->m_bind_frame = m_straight_frame;