From 47af19a447e6c13257ca2d0aef606ea45f8a0d98 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 21 Dec 2013 18:57:41 +0200
Subject: [PATCH] Throw an exception if trying to draw a Mesh with a different
 Mesh bound

---
 source/mesh.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/mesh.cpp b/source/mesh.cpp
index 91dadeab..316e5a3a 100644
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,6 +1,7 @@
 #include <msp/gl/extensions/arb_vertex_array_object.h>
 #include <msp/gl/extensions/arb_vertex_shader.h>
 #include "buffer.h"
+#include "error.h"
 #include "mesh.h"
 #include "renderer.h"
 
@@ -152,6 +153,10 @@ void Mesh::set_winding(const WindingTest *w)
 
 void Mesh::draw() const
 {
+	const Mesh *cur = current();
+	if(cur && cur!=this)
+		throw invalid_operation("Mesh::draw");
+
 	refresh();
 
 	if(!current())
-- 
2.43.0