JPS61214059A - Shift method for display pattern - Google Patents

Abstract

PURPOSE:To perform an operation for conversion of coordinates with high efficiency and to display the coordinates at a high speed, by coding the information used for conversion of coordinates of a display screen for preparation in case the angle of the rotary shift is set at (90Xn) degrees. CONSTITUTION:A computer 20 stores the input data in a memory 30 and performs a prescribed operation to design a print panel. Then the computer 20 displays the result of operation on the screen of a display part 40 or prints out it by a printer 50. A display file is stored in the memory 30 in the form of screen data. The figure of the file includes the data on lines, circles, etc. as well as subfigures including the information a1 showing the start, the information a2 on names, the information a3 on positions, the information a4 on the MR-codes, the information a5 on sizes and the information a6 on the rotary matrix respectively. The MR-code is shown in a 4-bit pattern with combination a of rotations of (90Xn) degrees and mirror shifts related to X and Y axes. Thus the conversion of coordinates is performed with high efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of moving a displayed figure by rotating or symmetrically moving the figure displayed on a display screen.

[Conventional technology]

For example, when cutting a printed board using a CAD device, if you want to change the position of an IC component due to a design change,
It is necessary to move the position of the IC component on the display screen of the CAD device. In order to meet these demands, some CAD devices have a function to move the position of figures on the display screen.

Conventionally, in such a CAD device, for example, when the figure A shown in Fig. 10 is rotated by an angle θ (A' is the figure after movement), the coordinate transformation of the display screen is performed using equation (1). There was something to do.

Here, xl, y]: Coordinates before movement x2. y2: Coordinate after movement [Problem to be solved by the invention] In the above-mentioned CAD device, when calculating equation (1), four multiplications and two additions and subtractions are required. Furthermore, since this calculation is performed for each coordinate of the figure, the more complex the figure, the longer the processing time.

By the way, when setting up a printed board using a CAD device, the rotation angle of the displayed figure is (
90×n) degrees (n is an integer) in most cases.

In the case of such a rotational movement of (90 x n) degrees, (1)
The values of the components of the rotation matrix (matrix composed of sinθ, Co!lθ, etc.) of the equation are 0, 1, . -1, it is conceivable that quality processing can be performed very easily.

Despite this, the above-mentioned CAD apparatus performs the same calculations (four multiplications and two additions and subtractions) when the rotation angle is (90×n) degrees as in other cases. For this reason,
There was a problem that the efficiency of coordinate conversion processing was low.

The present invention has been made in order to eliminate the above-mentioned problems, and it is an object of the present invention to realize a method for moving a displayed figure, in which calculations of coordinate transformation accompanying the movement of the displayed figure are efficiently performed, and high-speed display processing is possible. purpose.

[Means for solving problems]

The present invention provides a method for moving a displayed figure in which a figure displayed on a display screen is rotated and symmetrically moved, in which information used for coordinate transformation of the display screen is encoded when the rotation angle of the rotation is (90Xn) degrees. This is a method of moving a display figure that is prepared in advance and uses the code described above to transform the coordinates of the display screen when the rotation angle of the display figure is (90xn) degrees.

〔Example〕

The present invention will be explained below with reference to the drawings.

FIG. 1 is a diagram showing an example of the configuration of a device for carrying out the present invention, and shows the case of a CAD device.

In Figure 1, ]0 is the keyboard, 20 is the comviator, and 3
0 is a memory, 40 is a display section, and 5o is a printer.

An operator enters data into computer 20 from keyboard 10 . Here, the input data is, for example, i, the configuration of the circuit to be designed, the physical data of the bin for the installation of electronic components, the connection data between the terminals of each electronic component, and the arrangement of each electronic component on the printed board. Location data, etc.

The computer 20 stores this input data in the memory 30, performs predetermined calculations to design a printed board, and displays the results on the screen of the display unit 40 or prints them out using the printer 50.

A display file is stored in the memory 30 of such a device as screen data.

The structure of this display file will be explained.

The elements of a display file are called figures, and they contain data such as lines and circles. Also, Subf
There is a figure, which can be arbitrarily defined as a collection of lines, circles, etc., and can be used as an element within a figure. Also, Subfigure and other Subf
It can also be used as a component of igure. Su
bflgure to Figure or Subflgure
When defining within, rotational movement and symmetrical movement (hereinafter referred to as mirror movement) can be performed.

FIG. 2 shows the conceptual structure of a display file having such figures and subfigures.

As shown in Figure 2, the Subfigure includes S
Information a1 indicating the beginning of ubfigure, Subfi
Gure name information a Subfigure to be used
position information a3, subfigure color, MR-Code information a4 which is a coordinate transformation code for a specific movement, figure size information a5, and information used for coordinate transformation by rotational movement (rotation matrix information) Contains a.

Now, the contents of MR-Code in Subflgure will be explained.

MR-Code has codes for rotational movement and mirror movement. MR-Code uses Subfigure in display processing.
Determined when using re.

The MR-Code is determined by a combination of (90Xn) degree rotation and mirror movement about the X and Y axes.

The MR-Code is represented by a 4-bit bit pattern as shown in FIG. In this bit pattern, the upper two bits are information on rotational movement, and the third and fourth bits from the top are information on mirror movement regarding the Y axis and X rotation, respectively. The correspondence between the movement state and the bit state is shown in FIG.

Then, an MR-Code is assigned to each state of the Tohaturn as shown in FIG.

As shown in FIG. 5, even if the bit patterns are different, the MR-Code may be the same. For example, when the bit pattern is O or B, both MR-Code becomes 1. This is done by 180 degrees after performing the process shown in pit pattern B, that is, mirror movement regarding the Y-axis and Y-axis.
This indicates that when the image is rotated by 0, it returns to its original position.

Considering such overlapping processing, MR-Cod
There are eight types of e.

The correspondence between MR-Code and matrix is shown in FIG. As shown in FIG. 6, when rotating (90×n) degrees and moving the mirror, it is only necessary to classify the cases using MR-Code and change the sign of only the necessary coordinate values.

For example, if the MR-Code is 7, then it is necessary to simply change the signs of Xl and yl-.

The Subfigure is another Subfigure.
In some cases, the subfigure converted by MR-Code is further converted by MR-Code. In this case, only one conversion of MR-Code is sufficient without performing matrix multiplication shown in FIG. This conversion table is shown in FIG.

An example of coordinate transformation using the transformation table shown in FIG. 7 will be described.

An image of an arbitrary IC component is defined as Subfigure 1.

Subfigure 2 rotates this by 90 degrees.
It is defined as Furthermore, Subfigure 3 is created by mirror-moving Subfigure 2 about the Y axis.
It is defined as

In this case, Subfigure 2 is Subfigure
MR-Code is 5 for re 1, Subfig
ure 3 is MR-C for Subfigure 2
ode is 2. Subfigure 1~Subfigure
The relationship of igure 3 is shown in FIG.

As shown in Figure 8, Subfigure 1 and Subfigure
igure 2 has a parent-child relationship, and also has a Subfi
gure 2 and subfigure 3 are in a parent-child relationship.

Subfigure 2 is Subfigure 1 (
λ(R-Code = 1)
is 5, so the MR-Code becomes 5 from the part indicated by ■ in the conversion table. Furthermore, Subfigure
3 is Subfigure 2 (MR-Code =
Since the MR-Code is 2 for 5),
The MR-Code becomes 7 from the part indicated by ■ in the conversion table. Therefore, when displaying Subfigure 3, Subfigure 1 is displayed after coordinate transformation using MR-Code=7.

On the other hand, if the rotation angle of one rotation movement is other than (90Xn) degrees, set the MR-Code to 0, and use the rotation matrix information a6 in the subfigure to perform coordinate conversion by multiplying the matrices each time it moves. .

The operation of displaying using the method according to the present invention as described above will be explained.

FIG. 9 is a flowchart showing a display procedure using a method according to the present invention.

In FIG. 9, D1 is a determination as to whether the parent's MR-Code is 0, and D2 and D3 are determinations as to whether the child's MR-Code is 0 or not.

If the judgment D1 is YES, Subfigure
After reading out the parent rotation matrix (rotation matrix) IJx Fi (rotation matrix information a), judgment D3 is made. On the other hand, if the judgment D□ is No, a judgment is made.

Next, if the judgment D2 is YES, the Subfigure
After reading the child's rotation matrix F (rotation matrix information a6) in re, the parent's rotation matrix (IJxE) is created. This rotation matrix E is Subfigure
Created based on the MR-Code information in re.

After this, the rotation matrices E and F are integrated. On the other hand, if the determination D2 is NO, coordinate transformation is performed using the above-mentioned MR-Code.

If judgment D3 is YES, Subfigure
The rotation matrix of the child in the square F (rotation matrix information aS
), the rotation matrices E and F are integrated. On the other hand, if the determination D3 is No, a child rotation matrix F is created, and then the rotation matrices E and F are integrated. This rotation matrix F is Subfigure
Created based on the MR-Code information in e.

Depending on the case described above, display is performed after coordinate transformation using only MR-Code, rotation matrix, or coordinate transformation using FiXF.

Note that the device for implementing the method according to the present invention may be a device other than a CAD device, such as a graphic display device.

〔effect〕

According to the method according to the present invention, the following effects can be obtained.

That is, the information used for coordinate transformation when performing rotational movement with a rotation angle of (90Xn) degrees is prepared in advance by being encoded, and this information is used to perform coordinate transformation as necessary. As a result, coordinate transformation calculations can be performed efficiently and display processing can be performed at high speed. When designing a printed board using a CAD device, there are many rotational movements of (90×n) degrees, so the method according to the present invention having the above-mentioned effects is particularly effective in such cases.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the configuration of an apparatus for implementing the method according to the present invention, FIG. 2 is a conceptual configuration diagram of a display file stored in the apparatus of FIG. 1, and FIG. 3 is an MR- Co
Figure 4 shows the bit pattern representing de.
Figure 5 is a diagram showing the correspondence between the bit states and movement states of the bit patterns in Figure 3. Figure 5 is a diagram showing the MR-Code assigned to each bit pattern in Figure 3. Figure 6 is a diagram showing the MR-Code assigned to each bit pattern in Figure 3.
A diagram showing the correspondence between ode and coordinate transformation matrix, Figure 7 is M
The figure which showed the conversion table used when performing R-Code K↓ coordinate conversion. Fig. 8 is an explanatory diagram of the operation of coordinate transformation using the conversion table of Fig. 7, Fig. 9 is a flowchart showing the display procedure using the method according to the present invention, and Fig. 10 is the state of a figure rotating and moving. FIG. 30...Memory, a4...Mf (-Code information. i7., :';-1 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] Information used for coordinate transformation of the display screen when the rotation angle of the rotation is (90×n) degrees in a method of moving a display figure that rotates or symmetrically moves the figure displayed on the display screen. A method for moving a displayed figure, in which the code is prepared in advance in a coded manner, and when the rotation angle of the displayed figure is (90×n) degrees, the code is used to transform the coordinates of the display screen.