CS259354B1 - Connection of graphical information's representation's relative direction transformation into absolute direction - Google Patents

Abstract

Involvement belongs to the processing department data in computer graphics by technical means. Furthermore, it can still be used in electron lithography, robotics and the like applications. The connection solves technical problem of rapid transformation of relative change direction of travel (right, left back to one of four absolute direction orientation in two dimensional coordinate system. This problem occurs in the previous graphic systems using program resources, which is slow. The essence of involvement is that there is a logically connected block input combinational logic with input relative direction change signal terminals, block gates, remember absolute direction a output combination logic block with output with absolute signal sign terminals direction of view, with absolute memory direction and block of gates are connected first bad binding and output block combinational logic and input combinational block logic is connected by the second wrong bond.

Description

The invention solves the connection of the transformation of the relative display direction of the graphical information into the absolute direction, the task of which is to produce the signals for the signs of the arithmetic logic unit or the logic unit respectively. arithmetic-logical units of a graphical vector computer system based on graphical data - cells - with 1 'arbitrary nesting depth. In the prior art graphic vector systems, the function of controlling the drawing direction is performed by means of software, which is, however, relatively slow.

The principle of involving the transformation of the relative display direction of the graphical information into the absolute direction of the invention is that input terminals of relative directional change signals are connected to the input of the input combinational logic block, and the input of the gate block connected to the output of the absolute memory is connected to its output. a direction, the output of which is connected to an input of an output combinational log block, the output of which is connected to the output signals of the absolute sign signals, the memory of the absolute direction and the block of gates, the block of input and output combinational logic being coupled by poor constraints. The advantage of engagement is mainly its speed. Depending on the component being fitted, the direction change is 50 to 100 ns, which is 1 to 2 times shorter than the program treatment of such a change;

A schematic block diagram of the invention is shown in the accompanying drawing.

The input combination logic block 2 is connected to the gate block 3, followed by an absolute direction memory 4 and an output combination logic block 5. The input terminals 1 are connected to block 2 of the input combinational logic, input terminals IA and 1B to 4 absolute direction, input terminal 1C to block 5 of output combinational logic. Absolute direction memory 4 and gate block 3 are connected by a first bad coupling 7, input block 2 and output combination logic block 5 are joined by a second bad coupling 8. The individual blocks are realized by 12 TTL integrated circuits SSI - gates and flip-flops.

The function of the wiring according to the invention is as follows: the relative directional change signals at the input terminals 1 DOL (dofava), DOP (right), EXCH (direction inversion) are transformed into the absolute direction signals -jx, -x, -jy> in the display two-dimensional) coordinate system. Particularly at the output terminals 6 are the SIGX, SIGY sign signals for the arithmetic logic unit, respectively. arithmetic-logic units of the graphics processor. By means of the LPKO input signal it is possible to enter ALU signs simultaneously for both axes of the display coordinate system. The input signals consist of the aforementioned DOL, DOP, EXCH direction change signals on input terminals 1, the LPKO signal on input terminal 1C, the STB signal (strobe signal - input terminal 1AJ and SET signals (input terminals 1B) for the initial direction setting. the combinational logic prepares signals at input terminals 1 for input to the gate block 3, at the output of which there is a new absolute direction memory state 4. The output combination logic block 5 modifies this new state after being overwritten by the STB signal to the output signals SIGX, SIGY (output terminals 6 ) - Signs of each graphic ALU.

The wiring can be used in all embedded data graphics vector systems, where the operating speed requirements are very high and that work with both outline and area data representation, in electron lithography, robotics and elsewhere.

Claims (1)

SUBJECT Involving the transformation of the relative direction of displaying the graphical information into an absolute direction, characterized in that the input terminals (1) of the relative directional change signals are connected to the input of the input combination block (2) and the output of the input combination logic block (2) is connected to the input (3) a gateway to which an absolute direction memory input (4) is connected, the output of which is connected to the input of an output combinational logic block (5), the output of which is connected to the output terminals (6) of the absolute direction signal signals; (4) the absolute direction and the gate block (3) are connected by the first feedback (7), the output combination logic block (5) and the input combination logic block (2) are connected by the second feedback link (8).