Fixed navmesh

src/features/editScene/recast/TileCacheNavMesh.cpp

@@ -164,6 +164,11 @@ static void extractEntityMesh(Ogre::Entity *ent, std::vector<float> &verts,
 	size_t currentOffset = 0;
 	size_t nextOffset = 0;
 
+	// Global offset of this entity's vertices in the output arrays.
+	// Indices read from the mesh are relative to submesh/shared vertex
+	// data; we must shift them so they point into the unified buffers.
+	size_t baseVertex = verts.size() / 3;
+
 	for (unsigned short i = 0; i < mesh->getNumSubMeshes(); ++i) {
 		Ogre::SubMesh *sub = mesh->getSubMesh(i);
 		Ogre::VertexData *vd = sub->useSharedVertices ?
@@ -220,8 +225,9 @@ static void extractEntityMesh(Ogre::Entity *ent, std::vector<float> &verts,
 			      Ogre::HardwareIndexBuffer::IT_32BIT);
 
 		void *idata = ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);
-		size_t offset = sub->useSharedVertices ? sharedOffset :
-							 currentOffset;
+		size_t offset = baseVertex +
+				(sub->useSharedVertices ? sharedOffset :
+								currentOffset);
 
 		if (use32) {
 			unsigned int *p = static_cast<unsigned int *>(idata);