Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/demos/opengl/README b/demos/opengl/README
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+
+Navigation:
+ left button: rotate around the target
+ middle button: zoom
+ left button + ctrl quake rotate (rotate around camera position)
+ middle button + ctrl walk (progress along camera's z direction)
+ left button: pan (translate in the XY camera's plane)
+
+R : move the camera to initial position
+A : start/stop animation
+C : clear the animation
+G : add a key frame
+