Abstract: A three-dimensional model can be presented in a two-dimensional digital canvas on a computer display. User input directed at the three-dimensional model in the two-dimensional canvas can be received. The three-dimensional model can be manipulated in response to the user input. A two-dimensional view of the three-dimensional model can be displayed. Corresponding data structures for the model, the canvas, and the two-dimensional objects in the data structure can be maintained and updated. One or more additional techniques can also be utilized in a computer system, such as continuous user-controlled model rotation in a two-dimensional canvas; viewport autofit and non-autofit modes; rotating the model around a camera look-at point; ghosting outside the viewport; normalizing modeling units and values; preset buttons with on-button previews; user-defined view presets; and/or two-dimensional image substitution.

Abstract: A three-dimensional model can be presented in a two-dimensional digital canvas on a computer display. User input directed at the three-dimensional model in the two-dimensional canvas can be received. The three-dimensional model can be manipulated in response to the user input. A two-dimensional view of the three-dimensional model can be displayed. Corresponding data structures for the model, the canvas, and the two-dimensional objects in the data structure can be maintained and updated. One or more additional techniques can also be utilized in a computer system, such as continuous user-controlled model rotation in a two-dimensional canvas; viewport autofit and non-autofit modes; rotating the model around a camera look-at point; ghosting outside the viewport; normalizing modeling units and values; preset buttons with on-button previews; user-defined view presets; and/or two-dimensional image substitution.

Abstract: Smooth animation effects during zooming are provided by retaining content displayed at a previous zoom level. If the zoom operation is a zoom out operation, new content is stretched to a current zoom level, aligned with the retained content, and placed underneath it. If the zoom operation is a zoom in operation, new content is scaled down to the current zoom level, aligned with the retained content, and displayed on top of the retained content. The new content is then zoomed with the retained content. The retained content is then deleted. When zooming out, the retained content fades out. When zooming in, the new content fades in. Smooth scrolling animation is also provided by pre-rendering a portion of content and teleporting to a final viewport position and thereby skipping over blank content.

Abstract: A three-dimensional model can be presented in a two-dimensional digital canvas on a computer display. User input directed at the three-dimensional model in the two-dimensional canvas can be received. The three-dimensional model can be manipulated in response to the user input. A two-dimensional view of the three-dimensional model can be displayed. Corresponding data structures for the model, the canvas, and the two-dimensional objects in the data structure can be maintained and updated. One or more additional techniques can also be utilized in a computer system, such as continuous user-controlled model rotation in a two-dimensional canvas; viewport autofit and non-autofit modes; rotating the model around a camera look-at point; ghosting outside the viewport; normalizing modeling units and values; preset buttons with on-button previews; user-defined view presets; and/or two-dimensional image substitution.

Abstract: A three-dimensional model can be presented in a two-dimensional digital canvas on a computer display. User input directed at the three-dimensional model in the two-dimensional canvas can be received. The three-dimensional model can be manipulated in response to the user input. A two-dimensional view of the three-dimensional model can be displayed. Corresponding data structures for the model, the canvas, and the two-dimensional objects in the data structure can be maintained and updated. One or more additional techniques can also be utilized in a computer system, such as continuous user-controlled model rotation in a two-dimensional canvas; viewport autofit and non-autofit modes; rotating the model around a camera look-at point; ghosting outside the viewport; normalizing modeling units and values; preset buttons with on-button previews; user-defined view presets; and/or two-dimensional image substitution.

Abstract: A three-dimensional model can be presented in a two-dimensional digital canvas on a computer display. User input directed at the three-dimensional model in the two-dimensional canvas can be received. The three-dimensional model can be manipulated in response to the user input. A two-dimensional view of the three-dimensional model can be displayed. Corresponding data structures for the model, the canvas, and the two-dimensional objects in the data structure can be maintained and updated. One or more additional techniques can also be utilized in a computer system, such as continuous user-controlled model rotation in a two-dimensional canvas; viewport autofit and non-autofit modes; rotating the model around a camera look-at point; ghosting outside the viewport; normalizing modeling units and values; preset buttons with on-button previews; user-defined view presets; and/or two-dimensional image substitution.

Abstract: A three-dimensional model can be presented in a two-dimensional digital canvas on a computer display. User input directed at the three-dimensional model in the two-dimensional canvas can be received. The three-dimensional model can be manipulated in response to the user input. A two-dimensional view of the three-dimensional model can be displayed. Corresponding data structures for the model, the canvas, and the two-dimensional objects in the data structure can be maintained and updated. One or more additional techniques can also be utilized in a computer system, such as continuous user-controlled model rotation in a two-dimensional canvas; viewport autofit and non-autofit modes; rotating the model around a camera look-at point; ghosting outside the viewport; normalizing modeling units and values; preset buttons with on-button previews; user-defined view presets; and/or two-dimensional image substitution.

Abstract: Smooth animation effects during zooming are provided by retaining content displayed at a previous zoom level. If the zoom operation is a zoom out operation, new content is stretched to a current zoom level, aligned with the retained content, and placed underneath it. If the zoom operation is a zoom in operation, new content is scaled down to the current zoom level, aligned with the retained content, and displayed on top of the retained content. The new content is then zoomed with the retained content. The retained content is then deleted. When zooming out, the retained content fades out. When zooming in, the new content fades in. Smooth scrolling animation is also provided by pre-rendering a portion of content and teleporting to a final viewport position and thereby skipping over blank content.

Abstract: Many devices present a cursor on a display. In order to facilitate the user's visual identification and tracking of the location of the cursor, the device may present the cursor with many visual variations, such as blinking the cursor, or selecting colors for the cursor that contrast with the background. However, these techniques may only marginally increase the visibility of the cursor in some circumstances, and/or may appear visually unappealing to the user. Presented herein are techniques for presenting a cursor on the display as a first cursor layer in a first cursor color that blends with the background color, and, under the first layer, a second cursor layer in a contrasting cursor color with respect to the first cursor color and the background. The device may also periodically remove the first layer to display the contrasting second layer and to indicate the location of the cursor to the user.

Abstract: Smooth animation effects during zooming are provided by retaining content displayed at a previous zoom level. If the zoom operation is a zoom out operation, new content is stretched to a current zoom level, aligned with the retained content, and placed underneath it. If the zoom operation is a zoom in operation, new content is scaled down to the current zoom level, aligned with the retained content, and displayed on top of the retained content. The new content is then zoomed with the retained content. The retained content is then deleted. When zooming out, the retained content fades out. When zooming in, the new content fades in. Smooth scrolling animation is also provided by pre-rendering a portion of content and teleporting to a final viewport position and thereby skipping over blank content.

Abstract: Many devices present a cursor on a display. In order to facilitate the user's visual identification and tracking of the location of the cursor, the device may present the cursor with many visual variations, such as blinking the cursor, or selecting colors for the cursor that contrast with the background. However, these techniques may only marginally increase the visibility of the cursor in some circumstances, and/or may appear visually unappealing to the user. Presented herein are techniques for presenting a cursor on the display as a first cursor layer in a first cursor color that blends with the background color, and, under the first layer, a second cursor layer in a contrasting cursor color with respect to the first cursor color and the background. The device may also periodically remove the first layer to display the contrasting second layer and to indicate the location of the cursor to the user.

Abstract: Layout animation that automatically plays in response to a change in layout on UI platforms that typically require animations to be defined prior to the layout being calculated is provided. Developers are enabled to specify how one or more elements should animate via animation values that are relative to an unknown initial layout and an unknown final layout. When a property change event that triggers animation of an element occurs, the initial layout and the final layout of the element and its child elements are calculated. The animations are then scheduled to interpolate the changes in layout.

Abstract: Animation of computer-generated display components of user interfaces and content items is provided. An animation application or engine creates images of individual display components (e.g., bitmap images) and places those images on animation layers. Animation behaviors may be specified for the layers to indicate how the layers and associated display component images animate or behave when their properties change (e.g., a movement of an object contained on a layer), as well as, to change properties on layers in order to trigger animations (e.g., an animation that causes an object to rotate). In order to achieve high animation frame rates, the animation application may utilize three processing threads, including a user interface thread, a compositor thread and a rendering thread. Display behavior may be optimized and controlled by utilizing a declarative markup language, such as the Extensible Markup Language, for defining display behavior functionality and properties.

Abstract: Animations may cross different windows. These cross window animations may include interwindow animations and/or window transition animations. Interwindow animations are used to animate elements across windows. Window transitions are used to animate moving/resizing/showing/hiding windows simultaneously. To perform these animations, an overlay window covers the animation area that includes at least a portion of two different windows. Layers may be used to represent images or visual elements that can be moved as part of an animation. These layers may be placed in the animation overlay window to move visual elements across the underlying windows. Supported underlying windows are directed to draw content directly to the overlay window during the animation. A picture of the underlying window is drawn to the animation overlay window when the underlying window is not-supported such that the underlying window is included within the animation. When the animation is complete, the animation overlay window is removed.

Abstract: Memory storage and processing for idle computer-generated graphical display components are discarded for conserving memory capacity, processing resources and power consumption. If a computer-generated display frame goes idle for a prescribed duration, for example, 30 seconds, wherein no user action or processor action is performed on the idle display frame, stored data representing the idle display frame is discarded from memory and processing for the idle display component is ceased, thus conserving memory space, processing resources and power consumption (e.g., battery power). If the discarded display frame becomes active again, its discarded resources may be recreated. Alternatively, an idle display component may be passed to a separate application and may be reclaimed by a requiring application when the idle display component becomes active again.