From bfe42fa8e9aa84c4ec4eaeabf7a4b7aea57a1d9e Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Wed, 28 Oct 2015 20:24:42 +0100
Subject: [PATCH] Fix updating of light position uniform in GLSL (thanks to
 deflected for tracking this down)

---
 panda/src/glstuff/glShaderContext_src.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/panda/src/glstuff/glShaderContext_src.cxx b/panda/src/glstuff/glShaderContext_src.cxx
index 6cac37cf82..beec31ad17 100644
--- a/panda/src/glstuff/glShaderContext_src.cxx
+++ b/panda/src/glstuff/glShaderContext_src.cxx
@@ -1196,7 +1196,9 @@ reflect_uniform(int i, char *name_buffer, GLsizei name_buflen) {
           bind._func = Shader::SMF_first;
           bind._part[0] = Shader::SMO_vec_constant_x_attrib;
           bind._arg[0] = iname;
-          bind._dep[0] = Shader::SSD_general | Shader::SSD_shaderinputs | Shader::SSD_frame;
+          // We need SSD_transform since some attributes (eg. light
+          // position) have to be transformed to view space.
+          bind._dep[0] = Shader::SSD_general | Shader::SSD_shaderinputs | Shader::SSD_frame | Shader::SSD_transform;
           bind._part[1] = Shader::SMO_identity;
           bind._arg[1] = NULL;
           bind._dep[1] = Shader::SSD_NONE;