A 3-D graphics display system with depth buffer and pipeline processor

Algorithms are described for high-speed production of color-shaded, three-dimensional raster images. The algorithms are intended for use with a terminal that has a depth buffer for hidden surface removal, a processing speed of 10,000 polygons/sec, smooth shading, initializing, subpixel addressability and detail, transparency, local segment memory, a three-dimensional cursor, an any-angle cutting plane, local viewing transformation and contouring capabilities. The terminal interfaces with the computer through a 68,000 chip. The algorithm features fixed-point arithmetic operations and interfaces with a pipelined digital signal processor. Applications are foreseen in CAD, training simulators and animation.