Method and computing device for rendering graphical objects

1. A method of rendering a graphical object with a computing device having an output interface, comprising:

determining an additive transformation to be applied to a graphical object by linearly interpolating between a set of trigonometric values;

applying said additive transformation to a previously-determined cumulative transformation to obtain a cumulative transformation;

determining verification data corresponding to said cumulative transformation;

adjusting said cumulative transformation using said verification data; and

rendering said graphical object transformed with said cumulative transformation via said output interface.

2. The method of rendering a graphical object of claim 1 , wherein the difference between consecutive trigonometric values is greater than 0.1 degrees.

3. The method of rendering a graphical object of claim 2 , wherein the difference between consecutive trigonometric values is greater than or equal to one degree.

4. The method of rendering a graphical object of claim 3 , wherein said additive transformation and said cumulative transformation are represented by matrices.

5. The method of rendering a graphical object of claim 4 , wherein said determining said verification data comprises determining a determinant.

6. The method of rendering a graphical object of claim 5 , wherein said determining said verification data comprises:

determining the expected determinant of said additive transformation;

determining the determinant of said previously-determined cumulative transformation; and

multiplying the determinant of said previously-determined cumulative transformation by the expected determinant of said additive transformation.

7. The method of rendering a graphical object of claim 6 , wherein said adjusting of said transformation comprises adjusting at least one entry of said transformation using said verification data.

8. The method of rendering a graphical object of claim 7 , wherein said transformation is applied to an indicium of said graphical object.

9. The method of rendering a graphical object of claim 1 , wherein said output interface is a display.

10. The method of rendering a graphical object of claim 1 , wherein said computing device has limited memory means.

11. The method of rendering a graphical object of claim 1 , wherein said computing device has limited processing means.

12. The method of rendering a graphical object of claim 1 , wherein said computing device is a handheld electronic device.

13. A computing device for rendering a graphical object, comprising:

output means;

memory means for storing a graphical object, a previously-determined cumulative transformation to be applied to said graphical object, and program code for rendering said graphical object via said output means; and

processing means for executing said program code to determine an additive transformation to be applied to said previously-determined cumulative transformation to generate a cumulative transformation by linearly interpolating between a set of trigonometric values, for determining verification data corresponding to said cumulative transformation, for adjusting said cumulative transformation using said verification data, to apply said cumulative transformation to said graphical object, and to render said graphical object via said output means.

14. The computing device of claim 13 , wherein the difference between consecutive trigonometric values is greater than 0.1 degrees.

15. The computing device of claim 14 , wherein the difference between consecutive trigonometric values is greater than or equal to one degree.

16. The computing device of claim 13 , wherein said additive transformations and said cumulative transformation are represented by matrices.

17. The computing device of claim 16 , wherein determining said verification data comprises determining a determinant.

18. The computing device of claim 17 , wherein said determining said verification data comprises:

determining the expected determinant of said additive transformation;

determining the previously-determined determinant of said cumulative transformation; and

multiplying the determinant of said previously-determined cumulative transformation by the expected determinant of said additive transformation.

19. The computing device of claim 18 , wherein said adjusting of said cumulative transformation comprises adjusting at least one entry of said transformation using said verification data.

20. The computing device of claim 19 , wherein said cumulative transformation is applied to an indicium of said graphical object.

21. The computing device of claim 13 , wherein said output means is a printer.

22. The computing device of claim 13 , wherein said memory means are limited.

23. The computing device of claim 13 , wherein said processing means are limited.

24. The computing device of claim 13 , wherein said computing device is a handheld electronic device.

25. A computer readable medium encoded with a computer application for execution on a computing device, said computing device having an output interface, comprising:

program code for determining an additive transformation to be applied to a graphical object by linearly interpolating between a set of trigonometric values;

program code for applying said additive transformation to a previously-determined cumulative transformation to obtain a cumulative transformation;

program code for determining verification data corresponding to said cumulative transformation;

program code for adjusting said cumulative transformation using said verification data; and

program code for rendering said graphical object transformed with said cumulative transformation via said output interface.

26. The computer application of claim 25 , wherein the difference between consecutive trigonometric values is greater than 0.1 degrees.

27. The computer application of claim 26 , wherein the difference between consecutive trigonometric values is greater than or equal to one degree.

28. The computer application of claim 25 , wherein said transformation is represented by a matrix.

29. The computer application of claim 28 , wherein said verification data is comprised of a determinant.

30. The computer application of claim 29 , wherein said program code for adjusting of said cumulative transformation comprises program code for adjusting at least one entry of said cumulative transformation using said verification data.

31. The computer application of claim 25 , wherein said output interface is a display.

32. The computer application of claim 25 , wherein said computing device has limited memory means.

33. The computer application of claim 25 , wherein said computing device has limited processing means.

34. The computer application of claim 25 , wherein said computing device is a handheld electronic device.