From fee4481ef6637f1536b7f4f534ef2bb1000798bf Mon Sep 17 00:00:00 2001
From: Stuart Buchanan <stuart_d_buchanan@yahoo.co.uk>
Date: Fri, 19 Nov 2021 22:05:47 +0000
Subject: [PATCH] WS30: Add zUpTransform and modelOffset Uniforms.

---
 simgear/scene/tgdb/VPBTechnique.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/simgear/scene/tgdb/VPBTechnique.cxx b/simgear/scene/tgdb/VPBTechnique.cxx
index d5fcc2be..74e59d56 100644
--- a/simgear/scene/tgdb/VPBTechnique.cxx
+++ b/simgear/scene/tgdb/VPBTechnique.cxx
@@ -1382,6 +1382,8 @@ void VPBTechnique::applyColorLayers(BufferData& buffer, Locator* masterLocator)
         stateset->addUniform(atlas.ambient);
         stateset->addUniform(atlas.diffuse);
         stateset->addUniform(atlas.specular);
+        stateset->addUniform(new osg::Uniform("zUpTransform", osg::Matrixf(osg::Matrix::inverse(makeZUpFrameRelative(loc)))));
+        stateset->addUniform(new osg::Uniform("modelOffset", buffer._transform->getMatrix().getTrans()));
     }
 }