Example embodiments described herein pertain to a geographic information system (GIS), configured to obtain geospatial data representing a geographic area, assign a projection and coordinate system to the geospatial data, apply a transformation to the geospatial data, and generate a tile cache based on the transformed geospatial data, the tile cache including the determined projection and coordinate system.

A method for mapping a body organ, including receiving a three-dimensional (3D) map of the body organ having a multiplicity of map elements, each map element having a graphic attribute indicative of a local property of the body organ. The method further includes delineating a selected region of the map, so that the map is divided into the selected region and a non-selected region. The 3D map is displayed while the graphic attribute of the map elements specifically within the selected region are altered.

According to the invention, there is provided a computer-implemented method for designing a three dimensional modeled object in a three dimensional scene, wherein the method comprises the steps of : providing (300) a first curve; duplicating (301) the first curve to obtain a second curve; determining (302) a set of at least one starting point belonging to the first curve; determining (303) a set of at least one target point belonging to the second curve, each target point being associated at least one starting point ; linking (304) the relevant points with their associated target points by using at least a connecting curve.

An apparatus and method are provided for creating a virtual hole between a user's eye point and a cursor through a viewed three dimensional object. The user may select with the cursor an object on the other side of, or within, the three dimensional object without translating or rotating the three dimensional object.

A shell texture image shared for use among multilayer shell polygons and including a plurality of areas having transparency different from one another, is distorted to varying degrees depending on a position of each layer of the shell polygons, so as to texture-map each layer of the shell polygons therewith and so as to position the multilayer shell polygons in a virtual three-dimensional space. Thus, it is possible to realistically represent hair, grass, and the like with little effort in three-dimensional image processing.

Bei einem Verfahren zur grafischen Darstellung der Umgebung eines Kraftfahrzeugs, bei welchem einem Szenenbild, welches eine dreidimensionale Umgebungsszene der Umgebung des Kraftfahrzeugs darstellt und welches zweidimensional oder dreidimensional an den Fahrer des Kraftfahrzeugs ausgegeben wird, Grafikelemente überlagert werden, welche zur Unterstützung des Fahrers hinsichtlich der Interpretation der im Szenenbild enthaltenen räumlichen Information dienen, werden die Grafikelemente zumindest teilweise so ausgeführt und im Szenenbild angeordnet, dass sie in der Umgebungsszene zumindest ein virtuelles Begrenzungsobjekt mit dreidimensionaler Raumform verkörpern, welches zumindest eine Bezugsfläche aufweist, die einen kollisionsfrei durch das Kraftfahrzeug erreichbaren Freiraum von einem nicht kollisionsfrei erreichbaren Hindernisraum abgrenzt.

In a process where an object fades-in/fades-out, a rate of transparency change is set. A writing threshold is obtained according to the rate of change of the transparency of the object. Polygons included in the object are sequentially processed, and an α value of the processed polygon is obtained according to the rate of change of the transparency. When a Z value of the polygon is smaller than that registered in a Z-buffer, the polygon is drawn in a frame buffer. The Z value of the polygon is written to the Z-buffer only when the current α value is larger than the threshold. When a Z value of the polygon is larger than that registered in the Z-buffer, the polygon is not drawn in the frame buffer.