Added orthogonal projection mode to the viewer.

viewer/glow-extras/viewer/detail/command_queue.hh

@@ -169,6 +169,16 @@ public:
         return res;
     }
 
+    static command sceneOrthogonalProjection(tg::aabb3 bounds)
+    {
+        command res{instruction::ModifyScene};
+        res.data = [bounds](Scene& s) {
+            s.orthogonalProjectionEnabled = true;
+            s.orthogonalProjectionBounds = bounds;
+        };
+        return res;
+    }
+
     static command sceneClearAccum()
     {
         command res{instruction::ModifyScene};