A display device includes a plurality of cases having an opening/closing mechanism, a plurality of displays installed in a plurality of cases, and an open-close angle detector configured to detect an open-close angle between a plurality of cases. The display devices carries out a transforming process on a plurality of images based on the open-close angle between the cases such that a plurality of images can be visually recognized as a continuous plane image. Additionally, the display device changes the transforming process depending on a portrait orientation and a landscape orientation. Moreover, it is possible to correct a plurality of images based on a user's position concerning a user's specific part relative to the display device.

When generating a render output in which primitives to be rendered are to be clipped against a user-defined clip plane defined for the render output, and a primitive to be rendered is intersected by a user-defined clip plane defined for the render output, an edge representing the intersection of the primitive with the user-defined clip plane is determined. The rasteriser, when rasterising the primitive, then tests one or more regions of the render output being generated against the determined edge representing the intersection of the primitive with the user-defined clip plane to determine whether the region or regions should not be rendered for the primitive on the basis of the user-defined clip plane.

When generating a render output in which primitives to be rendered are to be clipped against a user-defined clip plane defined for the render output, and a primitive to be rendered is intersected by a user-defined clip plane defined for the render output, an edge representing the intersection of the primitive with the user-defined clip plane is determined. The rasteriser, when rasterising the primitive, then tests one or more regions of the render output being generated against the determined edge representing the intersection of the primitive with the user-defined clip plane to determine whether the region or regions should not be rendered for the primitive on the basis of the user-defined clip plane.

A method and system for simulation of deformation of elastic materials are disclosed herein. A matrix-free geometric multigrid method utilizing a direct coarse grid discretization is presented for the solution of linear systems resulting from an octree discretization of the equations of corotational linear elasticity. The diagonal component of the stiffness matrix needed for the multigrid smoother is calculated without generating the stiffness matrix. The use of an incomplete linear octree data structure supports the efficient simulation of objects with complicated boundaries. Furthermore, the method is robust to large deformations, making it suitable for character skinning applications in computer animation.

A graphics processing unit (GPU) may perform a binning pass to determine primitive-tile intersections for a plurality of primitives and a plurality of tiles making up a graphical scene, including performing low-resolution z-culling of representations of the plurality of primitives based at least in part on a first set of culling z-values each having a first test size to determine a first set of visible primitives from the plurality of primitives. The GPU may further perform a rendering pass to render the plurality of tiles based at least in part on performing the low-resolution z-culling of representations of the first set of visible primitives based at least in part on a second set of culling z-values that represents a second test size to determine a second set of visible primitives from the first set of visible primitives, wherein the first test size is greater than the second test size.

A graphics processing unit (GPU) may perform a binning pass to determine primitive-tile intersections for a plurality of primitives and a plurality of tiles making up a graphical scene, including performing low-resolution z-culling of representations of the plurality of primitives based at least in part on a first set of culling z-values each having a first test size to determine a first set of visible primitives from the plurality of primitives. The GPU may further perform a rendering pass to render the plurality of tiles based at least in part on performing the low-resolution z-culling of representations of the first set of visible primitives based at least in part on a second set of culling z-values that represents a second test size to determine a second set of visible primitives from the first set of visible primitives, wherein the first test size is greater than the second test size.

It is proposed a computer-implemented method for parameterizing a three-dimensional modeled object for tessellation. The method comprising the steps of providing a boundary representation of the modeled object, the boundary representation comprising geometrical data including parametric surfaces and topological data including a set of faces each defined as a portion of the 2D domain of a respective parametric surface; determining 2D meshes each fitting a respective face; and associating the 2D meshes to the geometrical data of the boundary representation. Such a solution improves the tessellation of a 3D modeled object.

A system that displays a set of polygons is described. This system obtains a set of line segments that defines the set of polygons. The system forms a horizontal index that keeps track of where line segments vertically project onto a horizontal reference line and similarly forms a vertical index for horizontal projections onto a vertical reference line. The system obtains a clip rectangle that defines a view into the set of polygons and uses the horizontal and vertical indexes to determine intersections between borders of the clip rectangle and line segments in the set of line segments. Next, the system uses the determined intersections to clip polygons in the set of polygons that intersect the clip rectangle. Finally, the system transfers the clipped polygons, and also unclipped polygons that fit completely within the clip rectangle, to a display device that displays the view into the set of polygons.

A system that displays a set of polygons is described. This system obtains a set of line segments that defines the set of polygons. The system forms a horizontal index that keeps track of where line segments vertically project onto a horizontal reference line and similarly forms a vertical index for horizontal projections onto a vertical reference line. The system obtains a clip rectangle that defines a view into the set of polygons and uses the horizontal and vertical indexes to determine intersections between borders of the clip rectangle and line segments in the set of line segments. Next, the system uses the determined intersections to clip polygons in the set of polygons that intersect the clip rectangle. Finally, the system transfers the clipped polygons, and also unclipped polygons that fit completely within the clip rectangle, to a display device that displays the view into the set of polygons.

A method and system for performing graphics processing is provided. The method and system includes storing stencil buffer values in a stencil buffer; generating either or both of a reference value and a source value in a fragment shader; comparing the stencil buffer values against the reference value; and processing a fragment based on the comparing the stencil buffer values against the reference value.