Added a method to MeshDataInstance that can return a substitute MeshInstance.

nodes/mesh_data_instance.cpp

@@ -19,6 +19,8 @@
 #include "../../texture_packer/texture_resource/packer_image_resource.h"
 #endif
 
+#include "scene/3d/mesh_instance.h"
+
 bool MeshDataInstance::get_snap_to_mesh() const {
 	return _snap_to_mesh;
 }
@@ -168,6 +170,22 @@ void MeshDataInstance::free_meshes() {
 	}
 }
 
+Node *MeshDataInstance::get_substitute_for_room() {
+	if (!_mesh.is_valid()) {
+		return nullptr;
+	}
+
+	Ref<ArrayMesh> m;
+	m.instance();
+
+	m->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES, _mesh->get_array());
+
+	MeshInstance *mi = memnew(MeshInstance);
+	mi->set_mesh(m);
+
+	return mi;
+}
+
 MeshDataInstance::MeshDataInstance() {
 	_dirty = false;
 	_snap_to_mesh = false;
@@ -226,4 +244,6 @@ void MeshDataInstance::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "material", PROPERTY_HINT_RESOURCE_TYPE, "Material"), "set_material", "get_material");
 
 	ClassDB::bind_method(D_METHOD("refresh"), &MeshDataInstance::refresh);
+
+	ClassDB::bind_method(D_METHOD("get_substitute_for_room"), &MeshDataInstance::get_substitute_for_room);
 }

nodes/mesh_data_instance.h

@@ -65,6 +65,8 @@ public:
 	void setup_material_texture();
 	void free_meshes();
 
+	Node *get_substitute_for_room();
+
 	MeshDataInstance();
 	~MeshDataInstance();