From b0a5cceafde81db37e8ee528fe6533c8953f6c8a Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Thu, 21 Mar 2019 12:35:53 +0100
Subject: [PATCH] glgsg: fix support for matrix arrays in vertex data

---
 panda/src/glstuff/glShaderContext_src.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/panda/src/glstuff/glShaderContext_src.cxx b/panda/src/glstuff/glShaderContext_src.cxx
index a2ac21cbc4..5a7eda65fc 100644
--- a/panda/src/glstuff/glShaderContext_src.cxx
+++ b/panda/src/glstuff/glShaderContext_src.cxx
@@ -2462,7 +2462,7 @@ update_shader_vertex_arrays(ShaderContext *prev, bool force) {
       }
 
       GLint p = bind._id._seqno;
-      max_p = max(max_p, p + 1);
+      max_p = max(max_p, p + bind._elements);
 
       // Don't apply vertex colors if they are disabled with a ColorAttrib.
       int num_elements, element_stride, divisor;