Abstract: A technical solution is provided for graphical representation of road segments by employing hardware tessellation, wherein cartographic data that describe at least one two-dimensional or three-dimensional road contour of the road segment are assigned to each road segment. One method aspect comprises the steps of piecewise partitioning the parametrization of the road segment into mutually independent curve segments, of providing at least one tessellation factor for each curve segment, the at least one tessellation factor specifying into how many subsegments each curve segment is to be subdivided in the direction of the road contour, of generating a tessellation pattern for each curve segment based on the at least one tessellation factor, and of generating primitives, capable of being represented on a screen, on the basis of the generated tessellation pattern and on the basis of the parametrized road contour.

Abstract: A technical solution is provided for graphical representation of road segments by employing hardware tessellation, wherein cartographic data that describe at least one two-dimensional or three-dimensional road contour of the road segment are assigned to each road segment. One method aspect comprises the steps of piecewise partitioning the parametrisation of the road segment into mutually independent curve segments, of providing at least one tessellation factor for each curve segment, the at least one tessellation factor specifying into how many subsegments each curve segment is to be subdivided in the direction of the road contour, of generating a tessellation pattern for each curve segment based on the at least one tessellation factor, and of generating primitives, capable of being represented on a screen, on the basis of the generated tessellation pattern and on the basis of the parametrised road contour.

Abstract: Views of parametric surfaces are rendered. A set of parametric surface patches representing a parametric surface being rendered is projected onto a scene, producing a set of view-projected surface patches. Each view-projected surface patch is identified for either culling, subdivision or rendering. For patches which are identified for subdivision, the patches are recursively subdivided into sub-patches until for each sub-patch a prescribed screen-space projection of the sub-patch satisfies a prescribed screen-space error metric. Once the error metric is satisfied, the sub-patch is identified for rendering. Patches and sub-patches which have been identified for rendering are prepared and rendered.

Abstract: Views of parametric surfaces are rendered. A set of parametric surface patches representing a parametric surface being rendered is projected onto a scene, producing a set of view-projected surface patches. Each view-projected surface patch is identified for either culling, subdivision or rendering. For patches which are identified for subdivision, the patches are recursively subdivided into sub-patches until for each sub-patch a prescribed screen-space projection of the sub-patch satisfies a prescribed screen-space error metric. Once the error metric is satisfied, the sub-patch is identified for rendering. Patches and sub-patches which have been identified for rendering are prepared and rendered.