SU696504A1 - Circle sharing device - Google Patents

Description

The invention relates to the field of automation and computer technology and can be used in display devices of graphic information of television type.

Devices for forming circles are known, comprising a control unit connected to a counter of approximated segments and to one of the inputs of a counter of increments of coordinates 1,

A disadvantage of the known devices is the low accuracy of reproduction of surrounding elements.

It is also known a device for forming circles, content, control unit, increment counter, approximated segment counter, register n code converter, the first input of which is coe; j "HeFi with the output of the control unit, the output of which is connected to the first input of the converter, codes and co the coordinate increment of the input C4eT4JfKa, the Koic-poro output is connected to the first input of the counting section and approximated segments, the first output of which is connected to one of the inputs of the control unit, and the second output of the counter of approximated segments is connected to torym codes input transducer, the input of the register coupled to the second input of the control unit, the second input of counter approximated line segments and the second input of the counter increments the register and the output being connected to the third input of the counter increments the coordinates 2

However, this device does not allow to reproduce circles with a radius smaller than the radius of a unit circle and not multiple to it. In addition, as the radius of the reproduced circle increases, the approximation error will increase.

The purpose of the present invention is to increase the accuracy of the formation of circles of different radius.

Claims (1)

To do this, 36 logical blocks, a constant memory block, an arithmetic block, the first input of which is connected to the first output, a register whose second output to the input of the logical block, the first output of which is connected to one of the counters of the approximated segments, are entered into the device for forming circles of various radii and the second output of the logic unit is connected to the first input of the permanent memory unit, the first output of which is connected to one of the inputs of the control unit, and the second input of the permanent memory unit is connected to one of the outputs of the counter increments the coordinates, one of the inputs Koto cerned connected to the output of the arithmetic unit, the second input of which is connected to the output unit constant memory. The drawing shows the structural electrical circuit of the device. It contains a register 1, the outputs of which are connected to logic unit 2 and arithmetic unit 3, permanent memory unit 4, control unit 5, coordinate increment counter 6, approximated segments counter 7, and 8 converters , tires 9, 10, 11, 12 13, 14, 15, 16, 17, 18, 19, 20 and 21 bonds. The proposed device works as follows. The register 1 receives the value of the radius of the reproduced circle in the form of a binary code. This value enters the input of the logic unit 2, where the n-gon is selected, the circle will be approximated, and the corresponding signal on the bus 11 goes to block 4 fixed memory, where the selection of DFs for the first segment and the square is done and a signal is received via bus 14B control unit 5 and bus 12 to the arithmetic unit 3, In the arithmetic unit the calculation is performed The first segment is copied and this value is copied to the counter 6 increments of coordinates on the bus 17. At the same time, the control unit generates a control signal proportional to L X, which by mvnie 16 goes to the count input of the counter increments, working in subtraction mode, and the input of the binary code converter 8 to the coordinate increment code, which is packed by a counter of 7 approximated segments. Thus, the output of the binary code converter to the code of the increments of coordinates along the stitch 20 postauet t L-pulses, which will correspond to the length of the first segment of the rectangle. As soon as the counter of 6 increments of coordinates obiulits, along the bar 15, it will give a signal to the permanent memory block, in which dx will be selected for the second segment of the q-gon, and along the bar, 18 into the counter 7 of the approximated segments where subtraction will occur from the number D) recorded in the meter on the bus 18. As soon as the value of the meter of the approximated segments reaches the value of V4, then the corresponding signal on the bar 19 will change the polarity of the pulses arriving at the output of the code converter. The interrogation of the block of permanent memory in this case will occur in the opposite direction of the original "During the first half frame, the right (left) part of the circle is formed. During the second half frame, the rest of the half circle is formed. Circumferencing is completed as soon as the counter of approximated segments is cleared and the pulse signal through the busbar 21 stops forming control signals. The implementation of the proposed device for the formation of circumferences allows to increase the accuracy of reproduction of circles. The invention The device for forming circles, containing a register, a control unit -1i, an approximate segment counter, a coordinate increment counter, a code converter, the first input of which is connected to the output of the control unit, the output of which is connected to the first input of the code converter and to the input of the increment counter coordinates, whose input is connected to the first input of the counter of approximated segments, the first output of which is .en to one of the inputs of the control unit, and the second output of the counter approximated by Ezkov is connected to the second input of the code converter, characterized in that, in order to increase the accuracy of the P1 form of circles of different radius, a logic block, a permanent memory block, an arithmetic unit, the first input of which is connected to the first register output, the second output of which connected to the logic input unit whose output is connected to one of the inputs of the counter. approximated segments, and the second output of the logic unit is connected to the first input of the permanent memory unit, the first output of which is connected to one of the inputs of the control unit, and the second input of the permanent memory unit is connected to one of the outputs of the coordinate increment counter, one of the inputs of which connected to you by the course of the arithmetic unit whose second input is connected to the output of the blogs of the permanent memory. Sources of information taken into account in the examination 1, USSR Author's Certificate N9 485478, cl.-G 06 K 15/20, .1973. 2 „USSR author's certificate .N9 491967, class, G 06 K 15/20, 1974.