From 8f13362f7a9f602a7dc7e05c5ec0c2bd32d48deb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Wed, 28 Nov 2012 16:24:29 +0100
Subject: [PATCH] Allow attribute-less Mesh.

For e.g. fullscreen triangle with no vertex data.
---
 src/Mesh.cpp | 2 +-
 src/Mesh.h   | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/Mesh.cpp b/src/Mesh.cpp
index 49956a899..621642dd1 100644
--- a/src/Mesh.cpp
+++ b/src/Mesh.cpp
@@ -111,7 +111,7 @@ void Mesh::bindVAO(GLuint vao) {
 }
 
 void Mesh::bind() {
-    CORRADE_ASSERT((_vertexCount == 0) == attributes.empty(), "Mesh: vertex count is non-zero, but no attributes are bound", );
+    CORRADE_ASSERT((_vertexCount != 0) || !attributes.empty(), "Mesh: attributes are bound but vertex count is zero", );
 
     (this->*bindImplementation)();
 }
diff --git a/src/Mesh.h b/src/Mesh.h
index 369d47a66..a7bcc2286 100644
--- a/src/Mesh.h
+++ b/src/Mesh.h
@@ -404,8 +404,9 @@ class MAGNUM_EXPORT Mesh {
          *
          * Default is zero.
          * @attention All bound attributes are reset after calling this
-         *      function, so you must call
-         *      addVertexBuffer()/addInterleavedVertexBuffer() afterwards.
+         *      function, so if your mesh has any vertex attributes, be sure
+         *      to call addVertexBuffer()/addInterleavedVertexBuffer()
+         *      afterwards.
          * @see MeshTools::interleave()
          */
         Mesh* setVertexCount(GLsizei vertexCount);