A technique for spatial partitioning and a data structure for storing references to objects in a scene. A grid-based loose octree (GLOtree) is a data structure that combines advantages of a uniform grid-based subdivision method and an octree-based subdivision method to provide a general purpose spatial partitioning method that works well with both static and dynamic scenes. In a GLOtree, objects are located at lower levels of the tree than in the prior art octree. This allows traversals to searc...

Provided is a method for traversing a space partition, especially a quadtree or octree. Through the intermediary of a quadtree or, respectively, octree partitioning of a surface or, respectively, a space there can be adaptively parceled the surface or respectively, space such that contained structures therein are suitably encompassed by the different sub-cells of the partition. The proposed method pertains to the traversing of that type of sub-cell structure with a semi-infinite straight-line or...

The 3D display device of the invention is based on an octree structure of data pertaining to an object to be displayed. This structure is memorized in a memory associated with a cache memory sending blocks of data on a bus to which a geometrical processor and an image-generating circuit are connected. The geometrical processor generates the visible part of another octree corresponding to a target universe which may be positioned in any way in relation to the object universe (a cube enclosing all...

To generate two-dimensional images of three-dimensional solid objects at high speed, an object is defined within a three-dimensional universe hierarchically subdivided into a plurality of discrete volumes of uniform size and similar orientation. The three-dimensional universe is represented by an octree structure having a plurality of nodes, one for every volume in the three-dimensional universe which is at least partially occupied by the object. An arbitrary point of view is selected. Nodes in ...

A method for approximating pixel colors in a display utilizing anoptimized color palette is provided. A color octree of a target display is generated by mapping the RGB color information from each pixel into the color octree. Each is generated such that each node of the octree tracks pixel count and color information. If the number of leaf nodes exceeds the target number of colors for the color palette, the octree is pruned by a recursive algorithm that compares a merging threshold to the number...