Projection matrix and texture size should be coherent

diff --git a/src/Instrumentation/od_gauge.cxx b/src/Instrumentation/od_gauge.cxx
index 820f0a9d8744d2de031d82a7484731634f41d9e7..e5eed1efc22da9eeddef0d7193ac3ac12316bde8 100644 (file)
--- a/src/Instrumentation/od_gauge.cxx
+++ b/src/Instrumentation/od_gauge.cxx
@@ -56,8 +56,7 @@ void FGODGauge::allocRT () {
     camera = new osg::Camera;
     // Only the far camera should trigger this texture to be rendered.
     camera->setNodeMask(simgear::BACKGROUND_BIT);
-    camera->setProjectionMatrix(osg::Matrix::ortho2D(-256.0, 256.0, -256.0,
-            256.0));
+    camera->setProjectionMatrix(osg::Matrix::ortho2D(-textureWH/2.0, textureWH/2.0, -textureWH/2.0, textureWH/2.0));
     camera->setViewport(0, 0, textureWH, textureWH);
     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
     camera->setRenderOrder(osg::Camera::PRE_RENDER);