JPS5827511B2 - pattern heart warmer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an apparatus that generates a pattern composed of vectors, which rotates the vectors constituting the pattern based on the information of the given original pattern to generate various patterns. It concerns the configuration of circuits for producing information.

In printers and display devices, it is often necessary to print or display character patterns or figures by rotating them.

As a method of generating a rotation pattern for this purpose, as shown in Figure 1, the direction of the vector that can be generated with one point 0 as the center is
Set n ways (where n is an integer, n-3 in Figure 1), and set the code indicating the direction of each azimuth vector (angle with the reference vector) sequentially from (001) (with the reference vector as (000)). ,010)...-(111), etc., calculate the binary code of the angle corresponding to the angle to be rotated, and calculate the binary code of the angle corresponding to this rotation angle. There is a method of adding the code to the binary code of the angle (direction) of each component vector of the original pattern to obtain the coded number of each component vector of the rotated pattern and displaying the pattern.

That is, for example, when OH in Figure 1 is used as an original vector and is rotated by π/4, the binary code (001) corresponding to the rotation angle π/4 with the OA vector in Figure 1 as a reference is
is added to the binary code (111) of the original vector OH (
iooo), the binary code (000) can be obtained by ignoring the carry, and the vector OA after rotation by π/4 can be generated. Also, if OH is rotated by 2π/4, 111+010=1001 By performing the calculation, the rotated vector 0B (001) can be obtained by ignoring the carry.

However, if we try to apply the same method to cases other than 2n equal divisions, for example, when rotating OF by π/3 in Figure 3, even if we add 101+001=110, there is no vector corresponding to the sum. Therefore, the vector OA after rotation cannot be displayed.

Therefore, in the conventional method, the direction of vector I・le that can be generated is 2.
This will be limited to n ways.

On the other hand, among the important requirements for pattern generators for characters, figures, etc., economic efficiency and display accuracy are cited as important.

Here, if the vector generation directions are limited to 2n ways, display accuracy will not be sufficiently satisfied.

In other words, for example, an equilateral triangle as shown in Figure 2 can be displayed very easily by dividing one circumference (2π) into six equal parts and determining the direction of generation of the azimuth vector as shown in Figure 3. It cannot be displayed accurately if it is divided into equal parts.

As an example, when n=3 is selected, the approximate figure becomes a right-angled isosceles triangle as shown in FIG.

However, even with conventional equipment, n is made thicker (as shown in Figure 5).
Here, if we choose n-5) and define a sufficiently large number of azimuth vectors, it is possible to display a more approximate pattern as shown in Figure 6, but the number of digits in the code that indicates the angle of one vector is As the number of devices increases, the hardware becomes larger and more complex in response to W, which impairs economic efficiency.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional pattern, and provides a pattern generating device that can generate an arbitrary number of azimuth vectors centered on one point.

The present invention will be explained by taking as an example the case where a pattern consisting of isosceles triangles shown by A in FIG. 7 is rotated.

This triangular pattern starts at O and Pa. Qa, Ra
It is composed of three consecutive vectors.

The relative length of each vector is 8;5;5.

In this case, each vector can be encoded as follows.

However, the upper 4 digits of the coded number indicate the relative length of the vector, and the lower 3 digits indicate the vectors Pa, Qa, and R corresponding to the five azimuth vectors shown in Figure 8.
This is the angle code of a.

In Figure 8, the orientation vector OA divides one revolution (2π) into five equal parts.
.

OB, .

The triangle A, which is the original pattern, is rotated counterclockwise by 2π15.
When rotating to obtain a pattern such as that shown in FIG. 7B, each vector must be encoded as follows.

As is clear from a comparison with that of each vector of the original triangle, it is necessary to convert the angle code for each -).

As mentioned above, Fig. 8 shows the angle setting code in which the angle code of each azimuth hectare is determined by setting OA as the reference vector of the angle code (000) and setting the 2π15 rotation angle as the quantization number 1. .

Therefore, when trying to rotate the original pattern counterclockwise by a certain angle.

An angle setting code corresponding to the rotation angle based on the OA vector in FIG. 8 may be added to the angle code of each vector of the pattern.

That is, for vector Pb, the angle code (001) corresponding to 215π rotation is added to the angle code (001) of vector Pa.
001) to obtain (010), and similarly vector R
b ni ℃・But the original code (011) and the angle code (00
1) to obtain (100).

However, for vector Qb, the original code (1
Adding the angle code (001) to 00) gives (101)
From and l, there is no corresponding orientation vector in FIG.

In this case, the maximum value of the angle code (i o
If we further add the one's complement (011) of (o), we get (0
00), and the angle code of Qb after rotation is obtained.

FIG. 9 shows an embodiment of the pattern generation circuit of the present invention suitable for performing the above-mentioned calculations.

When trying to obtain triangle pattern B in the figure by rotating triangle A, which is the original pattern in Figure 7, this rotation angle is equal to the angle that the azimuth vector OB makes with the reference vector OA in Figure 8. , the angle code of the azimuth vector (in this example, "ooi" and the rest are the same in parentheses) are stored in b1 to b3 of the rotation angle setting buffer 2 of the pattern generation circuit in FIG.
Set to .

Also, the maximum value (10
The one's complement (011) of 0) is stored in the auxiliary buffer 5 from 01 to e.
Set to 3.

Next, the angle code (001) of the constituent vector Pa of the original pattern triangle A is supplied to a1 to a3 of the input buffer 1, and the addition circuits 01 to c3 of the adder 3 combine the accumulated data of b1 to b3 with the accumulated data of a1 to a3. Add the accumulated data (00),
+001)L, and its sum (010) is compared in the comparator 4 with the maximum value (ioo) of the angle code of the orientation vector.

As in this example, when the sum is equal to or smaller than the maximum value, the O1 output of comparator 4 is used to
Fgt to g3 are opened, and the obtained sums are transferred as they are to the output buffer 1 via the OR gates h1 to h3, and output as the angle code of the component vector Pb of the new pattern after rotation.

On the other hand, when the sum is larger than the maximum value, the accumulated data of the auxiliary buffer 5 is further added to the sum by fl to f3 of the auxiliary adder 6, and the result is obtained by ignoring the carry of the most significant digit f1. The result passes through AND gates g4-g6 opened by comparator 40 output o2 and passes through OR gate h
1 to h3 to the output buffer 7, and output as the angle code of the component vector of the new pattern after rotation.

By performing similar calculations on other constituent vectors QRa, the angle code of each constituent vector of the rotated pattern can be obtained.

In this example, the angle code of each vector of triangle B is obtained by the following calculation.

Also, triangle C in Fig. 7 is 4
Since it has been rotated by 15π, by setting OIO in the rotation angle setting buffer, a new angle code of the constituent vector can be obtained by each calculation.

FIG. 10 is a block diagram showing another embodiment of the pattern generation circuit of the present invention, in which parts equivalent to or similar to those in FIG. 9 are denoted by the same reference numerals.

The angle code of the vector of the original pattern is stored in the input buffer 1, the code of the quantization number of the desired rotation angle is stored in the rotation angle setting buffer 2, and the one's complement of the maximum value of the azimuth vector angle code is stored in the complement buffer 5. Then, an adder 3 adds the accumulated code of the input buffer 1 and that of the rotation angle setting buffer 2.

The comparator 4 compares the sum with the maximum value of the azimuth vector angle code, and if the former is smaller or the two are equal, it is sent as is to the output buffer 7 via the gate 8 as the angle code of the rotated vector. Output.

When the sum is larger than the maximum value of the angle code of the azimuth vector, the accumulation code of the complement buffer 5 is added to the sum, and the output is sent to the output sofa via the gate 8 to calculate the angle of the vector after rotation. Output as code.

As can be seen from the above description, by using the present invention, it becomes possible to obtain various patterns obtained by rotating a single pattern composed of vectors using simple hardware.

Therefore, if applied to a device for generating characters or figures, etc.,
It is advantageous to enable rapid and economical pattern rotation.

[Brief explanation of the drawing]

Figures 1 and 5 are diagrams showing the azimuth vector that divides one revolution (2π) into 2n equal parts and its angle code, and Figure 3 shows the direction vector that divides one revolution (2π) into 2n equal parts.
Diagram showing the azimuth vector to be divided into equal parts and its angle code, 2nd
4 and 6 are diagrams showing the equilateral triangular pattern generated by the orientation vectors of FIGS. 3, 1, and 5, respectively; FIG. 7 is a diagram showing the rotation of the triangular pattern, and FIG. The figure shows the azimuth vector that divides one circumference into five equal parts and its angle code, Figure 9 is a schematic diagram of a circuit showing an embodiment of the present invention, and Figure 10 is a block diagram showing other embodiments of the present invention. It is a diagram. 1...--One-person buffer, 2--One rotation angle setting buffer, 3--Adder, 4--Comparator, 5
・−1−−−Auxiliary buffer, 7····°° output buffer, 8·····−Kate.

Claims (1)

[Claims] 1 An original pattern consisting of a group of vectors that assign angle codes to an arbitrary number of azimuth vectors that divide one revolution (2π) into equal angles, corresponding to the quantization number of angles from the reference azimuth vector, and are assigned with the angle codes. is rotated by an integral multiple of the divided angle to generate a new pattern. an input buffer that accumulates code information; a rotation angle setting buffer that accumulates angle code information of an azimuth vector corresponding to the rotation angle of the pattern; and an adder that adds the angle code information accumulated in both buffers; In addition to the above addition result, 1 of the maximum value of the angle code of the azimuth vector is added.
a complement adder that adds the complement of the adder, and compares the output of the adder with the maximum value of the azimuth vector angle code, and selectively outputs either the output of the adder or the complement adder according to the comparison result. A pattern generation circuit comprising a comparator and a gate for buffer transfer.