초록 ▼

A pixel control system and method of controlling the intensity of pixels on a raster video display screen with scan lines grouped in 20 pixel increments across the scan line to display an object. In a first operational sequence for a given polygon that represents a part of the object separate red, b

A pixel control system and method of controlling the intensity of pixels on a raster video display screen with scan lines grouped in 20 pixel increments across the scan line to display an object. In a first operational sequence for a given polygon that represents a part of the object separate red, blue, green and depth sections use the value (R) of a reference pixel in a first pixel group at the left side of the object to determine the pixel by pixel change (delta) in intensity and depth across the first pixel group. The sections are operated in successive operational sequences to process the other pixel groups along the scan line until the pixel group at the right side of the polygon is processed. The operations are repeated in respect to successive scan lines to process the entire polygon. Each section has two adder stages. The first stage produces signals representing R, R plus and minus certain deltas and selected other deltas. The second stage produces other R plus delta signals so that after set up there is one signal for each of the 20 pixels per pixel group output at the same time to provide intensity signals for each group, where the intensity varies uniformly on a pixel by pixel basis across each group and from group to group.

대표청구항 ▼

Apparatus for reducing the number of machine cycles required to display an object by controlling a video controller to define the pixel to pixel variation of pixels within a first group of pixels in a scan line of a video display device having a plurality of said scan lines, which comprises: means f

Apparatus for reducing the number of machine cycles required to display an object by controlling a video controller to define the pixel to pixel variation of pixels within a first group of pixels in a scan line of a video display device having a plurality of said scan lines, which comprises: means for generating signals representing the values of pixels on said scan lines to control the intensity of said pixels on said scan lines to display said object; means for providing a reference signal representing the value of a reference pixel of said first group; means for providing unitary and double delta signals representing the amounts and double the amounts by which the values of pixels in said first group vary from pixel to pixel from said reference pixel; first means responsive to said unitary and double delta signals and said reference signal and effective in a single machine cycle after set up for simultaneously generating a first series of output signals representing the values of said reference pixel and of selected pixels adjacent and next adjacent said reference pixel, said values varying uniformly with the distance of a particular pixel from said reference pixel; means operational at the same time as said first means for generating higher multiple signals representing more than double the amounts represented by said reference signal; second means combining each said output signal with each said higher multiple signal and effective in one next machine cycle following said single machine cycle for generating a second series of output signals for representing the values of the remainder of said pixels of said first group, wherein said values of said second series of output signals vary uniformly from pixel to pixel according to the distance of the particular pixel from said reference pixel; and means for applying said first and second series of output signals to said video controller to control said signals representing the values of said pixels to be displayed on said scan line for displaying said object.