Coordinate information updating device

1. A system, comprising:

a storage unit configured to store a coordinate value of an object in a three-dimensional coordinate system, the object configured to be displayed on a two-dimensional display;

an input interface configured to receive operation information of a two-dimensional coordinate system, the operation information usable to update xy-coordinate values of the three-dimensional coordinate system with respect to the object;

an operation information determination unit configured to determine whether the operation information is in accordance with a particular rule; and

an update unit configured, based on a result of the determination of the operation information determination unit, to:

update the xy-coordinate values of the three-dimensional coordinate system with respect to the object in accordance with the operation information, in response to the operation information not being in accordance with the particular rule, and

update a z-coordinate value of the three-dimensional coordinate system with respect to the object in accordance with the operation information to adjust a shape or position of the object in a z-coordinate direction and not update the xy-coordinate values of the three-dimensional coordinate system, in response to the operation information being in accordance with the particular rule.

2. The system of claim 1 , wherein the update unit is configured to update the z-coordinate value of the object based on at least one of a distance, a direction, or a speed of a trajectory of xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information.

3. The system of claim 1 , wherein the particular rule is a rule that a trajectory of xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information includes a particular trajectory.

4. The system of claim 3 , wherein the particular rule includes that the trajectory of the xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information includes the particular trajectory within a particular period of time.

5. The system of claim 3 , wherein the particular rule includes that the trajectory of the xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information continuously includes the particular trajectory a plurality of times.

6. The system of claim 3 , wherein the particular trajectory reaches an end point within a particular range via a point distant from a start point by a particular distance, a distance of the end point within the particular range from the start point being shorter than the particular distance.

7. The system of claim 6 , wherein the particular trajectory is an approximately-circular trajectory.

8. A method, comprising:

receiving operation information of a two-dimensional coordinate system, the operation information usable to update xy-coordinate values of an object in a three-dimensional coordinate system;

determining whether the operation information is in accordance with a particular rule; and

based on a result of the determination:

updating the xy-coordinate values of the object in the three-dimensional coordinate system in accordance with the operation information, in response to the operation information not being in accordance with the particular rule, and

updating a z-coordinate value of the object in the three-dimensional coordinate system in accordance with the operation information to adjust a shape or position of the object in a z-coordinate direction and not updating the xy-coordinate values of the object in the three-dimensional coordinate system, in response to the operation information being in accordance with the particular rule.

9. The method of claim 8 , wherein updating the z-coordinate value of the object comprises updating the z-coordinate value of the object based on at least one of a distance, a direction, or a speed of a trajectory of xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information.

10. The method of claim 8 , wherein the particular rule is a rule that a trajectory of xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information includes a particular trajectory.

11. The method of claim 10 , wherein the particular rule includes that the trajectory of the xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information includes the particular trajectory within a particular period of time.

12. The method of claim 10 , wherein the particular rule includes that the trajectory of the xy-coordinate values of the two-dimensional coordinate system corresponding to the operation information continuously includes the particular trajectory a plurality of times.

13. The method of claim 10 , wherein the particular trajectory reaches an end point within a particular range via a point distant from a start point by a particular distance, a distance of the end point within the particular range from the start point being shorter than the particular distance.

14. The method of claim 13 , wherein the particular trajectory is an approximately-circular trajectory.

15. A system, comprising:

a storage unit configured to store a coordinate value of an object in a three-dimensional coordinate system, the object configured to be displayed on a two-dimensional display;

an input interface configured to receive operation information of a two-dimensional coordinate system, the operation information including values of the two-dimensional coordinate system that are in a plane perpendicular to a z-coordinate direction of the three-dimensional coordinate system;

an operation information determination unit configured to determine whether the operation information is in accordance with a particular rule; and

an update unit configured, in response to the operation information being in accordance with the particular rule, to update a z-coordinate value of the three-dimensional coordinate system with respect to the object in accordance with the operation information to adjust a shape or position of the object in the z-coordinate direction and not update xy-coordinate values of the three-dimensional coordinate system.

16. The system of claim 15 , wherein the update unit is further configured, in response to the operation information not being in accordance with the particular rule, to update the xy-coordinate values of the three-dimensional coordinate system with respect to the object in accordance with the operation information and to not update the z-coordinate value of the three-dimensional coordinate system with respect to the object.

17. The system of claim 15 , wherein the update unit is configured to update the z-coordinate value of the three-dimensional coordinate system with respect to the object based on at least one of a distance, a direction, or a speed of a trajectory of the values of the operation information.

18. The system of claim 15 , wherein the particular rule is a rule that a trajectory of the values of the operation information includes a particular trajectory.

19. The system of claim 18 , wherein the particular rule includes that the trajectory of the values of the operation information includes the particular trajectory within a particular period of time.

20. The system of claim 18 , wherein the particular rule includes that the trajectory of the values of the operation information continuously includes the particular trajectory a plurality of times.