Add perspective shadows

Bug: skia:
Change-Id: I1972f85f593828c982ea08143e1ed7eb70345eaa
Reviewed-on: https://skia-review.googlesource.com/10296
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/include/utils/SkCamera.h b/include/utils/SkCamera.h
index 4b77ec685d..3cb13fc19b 100644
--- a/include/utils/SkCamera.h
+++ b/include/utils/SkCamera.h
@@ -103,10 +103,10 @@ public:
     void update();
     void patchToMatrix(const SkPatch3D&, SkMatrix* matrix) const;
 
-    SkPoint3D   fLocation;
-    SkPoint3D   fAxis;
-    SkPoint3D   fZenith;
-    SkPoint3D   fObserver;
+    SkPoint3D   fLocation;   // origin of the camera's space
+    SkPoint3D   fAxis;       // view direction
+    SkPoint3D   fZenith;     // up direction
+    SkPoint3D   fObserver;   // eye position (may not be the same as the origin)
 
 private:
     mutable SkMatrix    fOrientation;