Parallel processing three-dimensional drawing apparatus for simultaneously mapping a plurality of texture patterns

摘要

A three-dimensional graphic drawing apparatus having texture pattern memory units which store a texture pattern having a set of texture pixel data designated by two-dimensional ST texture coordinate values. A display memory unit writes a two-dimensional image of a surface shape of a three-dimensional object to an address designated by two- dimensional XY display coordinate values corresponding to a display screen. Mapping units produce two-dimensional UV surface shape coordinate values of a three-dimensional object which are projected onto the two- dimensional UV surface shape. The mapping units convert the coordinate values into two- dimensional ST texture coordinate values, read out corresponding texture pixel data designating the two- dimensional XY display coordinate values corresponding to the two- dimensional UV surface shape coordinate values, and write two- dimensional XY display coordinate values into the display memory unit. A parallel processing unit reads texture pixel data from different coordinate positions from the texture pattern memory unit using a single access of the mapping unit when the texture pattern has been stored into the plurality of texture pattern memory units and enables the texture pixel data to be simultaneously written into the display memory unit. A time-division processing unit selects a texture pattern memory unit when different kinds of texture patterns have been stored into the texture pattern memory units, for sequentially reading the texture pixel data by the mapping units and writes out the texture pixel data to be written into the display memory unit.