Abstract: A computer system displays a first object that includes at least a first portion of the first object and a second portion of the first object and detects a first gaze input that meets first criteria, wherein the first criteria require that the first gaze input is directed to the first portion of the first object in order for the first criteria to be met. In response, the computer system displays a first control element that corresponds to a first operation associated with the first object, wherein the first control element was not displayed prior to detecting that the first gaze input met the first criteria, and detects a first user input directed to the first control element. In response to detecting the first user input directed to the first control element, the computer system performs the first operation with respect to the first object.

Abstract: A system and method for determining the optimal path for an aircraft to fly from a first position to a second position so that the aircraft heading at the second position is within preselected minimum and maximum heading limits. A two-dimensional reference grid is constructed so that the first position is in the center cell of the first rank of the grid and the second position is adjacent to the center cell of the last rank thereof. Dynamic programming techniques are used to determine the possible flight paths between the first and second positions and to select the path of minimum cost as the optimal path. The possible flight paths are constructed by identifying the possible connections between the last rank and the second postion and then between each pair of adjacent ranks, working backward from the last rank to the first position, which is located in the first rank. A possible connection is deemed to exist when the aircraft can fly from one point to a target point (e.g.