Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, for controlling a virtual camera in a three dimensional environment displayed on a two dimensional touchscreen display include: presenting on the two dimensional touchscreen display a camera view into the three dimensional environment; receiving input indicating a single touch by a user on the two dimensional touchscreen display, the single touch including a slide across the two dimensional touchscreen display; and updating, in response to the input, the camera view into the three dimensional environment presented on the two dimensional touchscreen display, the updating including rotating the camera view in accordance with a first direction of the input across the two dimensional touchscreen display, and changing a distance of the camera view in accordance with a second direction of the input across the two dimensional touchscreen display.

Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, for controlling a virtual camera in a three dimensional environment displayed on a two dimensional touchscreen display include: presenting on the two dimensional touchscreen display a camera view into the three dimensional environment; receiving input indicating a single touch by a user on the two dimensional touchscreen display, the single touch including a slide across the two dimensional touchscreen display; and updating, in response to the input, the camera view into the three dimensional environment presented on the two dimensional touchscreen display, the updating including rotating the camera view in accordance with a first direction of the input across the two dimensional touchscreen display, and changing a distance of the camera view in accordance with a second direction of the input across the two dimensional touchscreen display.

Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, for controlling a virtual camera in a three dimensional environment displayed on a two dimensional touchscreen display of a handheld mobile computing device include: rendering a camera-control user interface (UI) element in a portrait mode UI; receiving first input indicating contact with the UI element, and then receiving second input indicating movement of the maintained contact point; rotating the camera view around a targeted location responsive to the second input indicating movement along a first axis of the UI element; zooming the camera view in and out from the targeted location responsive to the second input indicating movement up and down along a second axis of the UI element; and rendering changes to which portion of the three dimensional environment is shown from which perspective responsive to changing the camera view while the second input is received.

Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, for controlling a virtual camera in a three dimensional environment displayed on a two dimensional touchscreen display of a handheld mobile computing device include: rendering a camera-control user interface (UI) element in a portrait mode UI; receiving first input indicating contact with the UI element, and then receiving second input indicating movement of the maintained contact point; rotating the camera view around a targeted location responsive to the second input indicating movement along a first axis of the UI element; zooming the camera view in and out from the targeted location responsive to the second input indicating movement up and down along a second axis of the UI element; and rendering changes to which portion of the three dimensional environment is shown from which perspective responsive to changing the camera view while the second input is received.

Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, for controlling a virtual camera in a three dimensional environment displayed on a two dimensional touchscreen display of a handheld mobile computing device include: rendering a camera-control user interface (UI) element in a portrait mode UI; receiving first input indicating contact with the UI element, and then receiving second input indicating movement of the maintained contact point; rotating the camera view around a targeted location responsive to the second input indicating movement along a first axis of the UI element; zooming the camera view in and out from the targeted location responsive to the second input indicating movement up and down along a second axis of the UI element; and rendering changes to which portion of the three dimensional environment is shown from which perspective responsive to changing the camera view while the second input is received.