Digital vector generator for a graphic display system

• US 4,808,988 A
• Filed: 04/13/1984
• Issued: 02/28/1989
• Est. Priority Date: 04/13/1984
• Status: Expired due to Fees

• Current Assignee: Megatek Corp (HP Inc.)
• Original Assignee: Megatek Corp (HP Inc.)
• Inventors: Burke, Gregory M., Jones, Michael E.
• Primary Examiner(s): Brigance, Gerald L.
• Assistant Examiner(s): Brier, Jeffery A.
• Application Number:
  US06/600,106
• Time in Patent Office: 1,782 Days
• Field of Search: 340/736, 340/739, 340/741, 340/742, 340/744, 340/745, 340/729, 364/522
• US Class Current: 345/16
• CPC Class Codes: G09G 1/04 Deflection circuits ; Constructional details not otherwise provided for electron-optical arrangements H01J29/46, H01J37/04, H01J37/302
• CPC Class Codes: G09G 5/363 Graphics controllers

Abstract

A graphics display system digital vector generator system includes three position vector generators generating position information for each of three different pixel location dimensions and three visual characteristic vector generators operating synchronously with the position vector generators to generate dynamic intensity information for three different dimensions of visual characteristics. Optical processing of visual characteristic vectors includes normalization to generate Phong shading intensity vectors, pattern shape generation, and mixing of hue and intensity information with selectable resolution to obtain a desired visual characteristic pixel data representation.

Claims

1. A digital vector generator system comprising:

a plurality of spatial vector generators coupled to receive position information representing a visual image and to generate in response thereto data defining a sequence of pixel coordinate points defining a line within a display image; and

at least one visual characteristic vector generator coupled to receive visual characteristic information representing the visual image and to operate synchronously with the spatial vector generators to generate in response to the received visual characteristic information visual characteristic vector information corresponding to each pixel coordinate point defined by the data generated by the spatial vector generators; and

means for generating a video signal coupled to receive the sequence of pixel coordinate points from each of the spatial vector generators and the visual characteristic vector information from the at least one visual characteristic vector generator and generating a video signal representing the video image in response thereto.

2. A digital vector generator system according to claim 1 above, wherein at least one visual characteristic vector generator includes an absolute value circuit coupled to receive each generated vector value and generate as the vector generator output signal the absolute value of the generated vector value.

3. A digital vector generator system according to claim 1 above, wherein at least one visual characteristic vector generator includes a masking circuit coupled to latch a selected number of most significant digits of a vector output signal generated thereby at a predetermined selected value.

8. A digital vector generator system according to claim 1 above, wherein the at least one visual characteristic vector generator includes at least two visual characteristic vector generators and further comprising a writeable pattern store coupled to receive the visual characteristic vector information from at least two of the visual characteristic vector generators as address inputs and generate as an output hue data defining a desired pattern of visual color data in accordance with data stored in the pattern store.

9. A digital vector generator system according to claim 8 above, further comprising a normalizing circuit coupled to receive visual characteristic vector information from each of the visual characteristic vector generators and generate in response thereto intensity data representative of a resultant magnitude of the received visual characteristic vector information.

10. A digital vector generator system according to claim 9 above, further comprising a color intensity multiplexer coupled to receive the intensity data from the normalizing circuit and the hue information from the pattern store and generate pixel data commanding the visual characteristics of each pixel as a combination of the hue and intensity data with each having a selectable resolution selected in response to a mode control signal.

11. A digital vector generator system according to claim 8 above, wherein at least two of the digital vector generators each include a masking circuit coupled to latch a selected number of most significant digits of a vector output signal generated thereby at a predetermined selected value.

4. A digital vector generator system comprising:

a plurality of spatial vector generators coupled to receive position information representing a visual image and to generate in response thereto data defining a sequence of pixel coordinate points defining a line within a display image; and

at least one visual characteristic vector generator coupled to receive visual characteristic information representing the visual image and to operate synchronously with the spatial vector generators to generate in response to the received visual characteristic information visual characteristic vector information corresponding to each pixel coordinate point defined by the data generated by the spatial vector generators; and

a dynamic intensity processing circuit coupled to receive the visual characteristic vector information for each pixel coordinate point and generate in response thereto a visual characteristic data representation having one of a plurality of different selectable relationships to the visual characteristic vector information with the one relationship being selected in response to at least one control signal.

5. A digital vector generator system according to claim 4, wherein the dynamic intensity processing circuit includes a pattern shape multiplexer receiving vector information from at least two of the visual characteristic vector generators and outputting in response thereto multiplexed vector information representing one of a plurality of different weighted combinations of the received vector information, the one combination being selected in response to a received pattern shape selection control signal.

6. A digital vector generator system comprising:

a plurality of spatial vector generators coupled to receive position information representing a visual image and to generate in response thereto data defining a sequence of pixel coordinate points defining a line within a display image; and

at least two visual characteristic vector generators coupled to receive visual characteristic information representing the visual image and to operate synchronously with the spatial vector generators to generate in response to the received visual characteristic information visual characteristic vector information corresponding to each pixel coordinate point defined by the data generated by the spatial vector generators; and

a normalizing circuit coupled to receive the generated visual characteristic vector information and generate normalized intensity information representative of the magnitude of the received vector information in response thereto.

7. A digital vector generator system comprising:

a plurality of spatial vector generators coupled to receive position information representing a visual image and to generate in response thereto data defining a sequence of pixel coordinate points defining a line within a display image;

at least two visual characteristic vector generators coupled to receive visual characteristic information representing the visual image and to operate synchronously with the spatial vector generators in response to the received visual characteristic information visual characteristic vector information corresponding to each pixel coordinate point defined by the data generated by the spatial vector generators; and

a normalizing circuit coupled to receive the generated visual characteristic vector information and generate normalized intensity information representative of the square root of the sum of the squares of individual vectors represented by the received visual characteristic vector information.

12. A graphic display digital vector generating system comprising:

at least three spatial vector generators, each coupled to receive information defining a different dimension of a spatial vector within a graphic scene including respectively vertical, horizontal and depth and to respond by generating video disply spatial information defining coordinate values in one dimension of a display for each of a sequence of video display pixel points representing the spatial vector within the graphic scene;

a plurality of visual characteristic vector generators each coupled to receive information defining a different dimension of a visual characteristic vector representing visual characteristics of the spatial vector and to respond by generating visual characteristic information in one dimension for each point of the sequence of video display pixel points representing the spatial vector within the graphic scene; and

a visual characteristic processing circuit coupled to receive from each visual characteristic vector generator the visual characteristic information generated thereby and to output for each video display pixel point information representing the visual characteristic thereof.

13. A graphic display digital vector generating system comprising:

a plurality of spatial vector generators, each coupled to receive information defining a different dimension of a spatial vector within a graphic scene and to respond by generating video display spatial information defining coordinate values in one dimension of a display for each of a sequence of video display pixel points representing the spatial vector within the graphic scene;

a plurality of visual characteristic vector generators each coupled to receive information defining a different dimension of a visual characteristic vector representing visual characteristics of the spatial vector and to respond by generating visual characteristic information in one dimension for each point of the sequence of video display pixel points representing the spatial vector within the graphic scene; and

a visual characteristic processing circuit coupled to receive from each visual characteristic vector generator the visual characteristic information generated thereby and to output for each video display pixel point information representing the visual characteristic thereof.

14. The graphic display vector generating system according to claim 13 above, wherein there are three visual characteristic vector generators.

15. The graphic display vector generating system according to claim 14 above, wherein one of the visual characteristic vector generators is coupled to receive visual intensity information.

16. The graphic display vector generating system according to claim 15 above, wherein two of the visual characteristic vector generators are coupled to receive color information.

17. The graphic display vector generating system according to claim 13 above, wherein the visual characteristic processing circuit includes a normalizing circuit coupled to receive the generated visual characteristic information from each of the visual characteristic vector generators and to output for each display pixel point information representing a resultant vector which is resultant of the visual characteristic information received from each of the visual characteristic vector generators.

18. A graphic display vector generating system according to claim 17 above, further comprising a pattern shape multiplexer coupled to receive a selection control signal and to receive generated visual characteristic information corresponding to a pixel point from at least two visual characteristic vector generators and to combine the received information in one of a plurality of different predetermined ways selected in response to the selection control signal to generate a pattern store address;

and a pattern store storing selected visual characteristic information at each of a plurality of address therein and coupled to receive pattern store addresses, each corresponding to a pixel point, from the pattern shape multipexer and for each received pattern store address to output the selected visual characteristic information stored thereat.

19. The graphic display vector generating system according to claim 18 above, further comprising a multiplex shifter circuit coupled to receive data defining a resultant vector point corresponding to a pixel point from the normalizing circuit and the corresponding selected visual characteristic information from the pattern store and to output a selected combination thereof as data representing a visual display characteristic, data representing a separate visual display characteristic being output for each video display pixel point in the sequence.

20. A digital vector generator system comprising:

a plurality of spatial vector generators coupled to receive position information representing one or more objects in a visual image and to generate in response thereto a sequence of pixel coordinate points defining at least one feature of the one or more objects within a display image; and

a plurality of visual characteristic vector generators coupled to receive visual characteristic information representing visual characteristics of the one or more objects in the visual image and to generate in response thereto visual characteristic information defining a visual characteristic of the display image at each of the pixel coordinate points in the sequence of points generated by the plurality of spatial vector generators, and

means for generating a video signal representing the display image in response to the generated sequence of pixel coordinate points and the generated visual characteristic information.