Interpreting Gesture Input Including Introduction Or Removal Of A Point Of Contact While A Gesture Is In Progress

A method for interpreting gesture input on a touch-sensitive surface, comprising:

• receiving input representing a gesture, the input comprising at least two initial points of contact with the touch-sensitive surface;
• determining at least one parameter for the gesture, according to the at least two points of contact;
• performing an operation associated with the received gesture input, according to the determined at least one parameter;
• outputting a result of the performed operation on an output device;
• receiving additional input representing a continuation of the gesture, the additional input comprising removal of at least one point of contact with the touch-sensitive surface;
• changing at least one previously determined parameter for the gesture according to at least one remaining point of contact;
• continuing the operation associated with the received gesture input, according to the changed at least one parameter;
• and
• outputting a result of the continued operation on the output device.

A system for interpreting gesture input on a touch-sensitive surface, comprising:

• a touch-sensitive surface, for receiving input representing a gesture, the input comprising at least one initial point of contact with the touch-sensitive surface;
• a processor, for:
• determining at least one parameter for the gesture, according to the at least one point of contact;
• performing an operation associated with the received gesture input, according to the determined at least one parameter;
• and
• an output device, for displaying a result of the operation;
• wherein:
• the touch-sensitive surface receives additional input representing a continuation of the gesture, the additional input comprising at least one additional point of contact with the touch-sensitive surface;
• the processor changes at least one previously determined parameter for the gesture, according to the at least one initial point of contact and the at least one additional point of contact, and continues the operation associated with the received gesture input, according to the changed at least one parameter;
• and
• the output device displays the result of the continued operation.

A system for interpreting gesture input on a touch-sensitive surface, comprising:

• a touch-sensitive surface, for receiving input representing a gesture, the input comprising at least two initial points of contact with the touch-sensitive surface;
• a processor, for:
• determining at least one parameter for the gesture, according to the at least two points of contact;
• performing an operation associated with the received gesture input, according to the determined at least one parameter;
• and
• an output device, for displaying a result of the operation;
• wherein:
• the touch-sensitive surface receives additional input representing a continuation of the gesture, the additional input comprising removal of at least one point of contact with the touch-sensitive surface;
• the processor changes at least one previously determined parameter for the gesture, according to at least one remaining point of contact, and continues the operation associated with the received gesture input, according to the changed at least one parameter;
• and
• the output device displays the result of the continued operation.