Patent ID: 7173633

Claim:
In a data processing system that executes a program of instructions, a method for inverting a point X on a distorted surface in a detail-in-context presentation for display on a display screen, comprising the steps of: (a) locating a first approximation point P i , for an inversion of the point X, wherein the point P i is on an undistorted surface; and, (b) obtaining a point P i D by displacing the point P i , onto the distorted surface by applying a distortion function D; calculating a magnitude of the difference|P i D âˆ’X| between the point X and the point P i D ; determining whether the point P i is acceptable for the inversion of the point X by comparing the magnitude of the difference to a tolerance Î´; and, displaying the point P i on the display screen if the point P i is acceptable for the inversion of the point X.