1 files changed, 13 insertions, 1 deletions
diff --git a/intern/cycles/render/camera.h b/intern/cycles/render/camera.h
index 1bedb051112..53bd4f0bc14 100644
--- a/intern/cycles/render/camera.h
+++ b/intern/cycles/render/camera.h
@@ -32,12 +32,24 @@ class Scene;
 /* Camera
  *
  * The camera parameters are quite standard, tested to be both compatible with
- * Renderman, and Blender after remapping. */
+ * Renderman, and Blender after remapping.
+ */
 
 class Camera {
 public:
+	/* Specifies an offset for the shutter's time interval. */
+	enum MotionPosition {
+		/* Shutter opens at the current frame. */
+		MOTION_POSITION_START,
+		/* Shutter is fully open at the current frame. */
+		MOTION_POSITION_CENTER,
+		/* Shutter closes at the current frame. */
+		MOTION_POSITION_END,
+	};
+
 	/* motion blur */
 	float shuttertime;
+	MotionPosition motion_position;
 
 	/* depth of field */
 	float focaldistance;