JPS63221477A - File conversion method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] When exchanging graphic data between file 1 that displays and stores graphic data in floating point format and file 2 that displays and stores graphic data in fixed point format, floating point If the graphic data converted from format to fixed-point format is a value outside the fixed-point format display limit, it will be stored in floating-point format and not displayed, and when returning to file 1, it will not be converted and it will be Send as is to file 1.

[Industrial application field]

The present invention provides an automatic design system using a computer.
This relates to file conversion between graphic databases that have incompatible items.

[Conventional technology]

Automatic design system using conventional computers (hereinafter simply CA)
D), the graphic data may be displayed in floating point coordinates or in fixed point coordinates.

FIG. 3 is a diagram showing an example of a conventional file conversion method.

In the figure, 1 is a file in which graphic data is displayed in floating point coordinates, 2 is a file in which graphic data is displayed in fixed point coordinates, 3 is a conversion means, 4 is a display screen, and 6 is an inspection means.

The same symbols represent the same objects throughout the figures below.

It is assumed that all the graphic data stored in file l is displayed in floating point coordinates, and that graphic element A, graphic element B, graphic element C1, and graphic element 1 are stored.

It is also assumed that all graphic data stored in file 2 is displayed in fixed-point coordinates.

When moving the graphic elements A to 3 currently stored in file 1 to file 2, the conversion means 3 is operated to convert the coordinates of graphic elements A to 3, which are displayed in floating point coordinates, to file 2. After converting to fixed-point coordinates, it is transferred to file 2 and displayed on display screen 4.

[Problem that the invention seeks to solve]

As is well known, the width of a graphic area displayed using floating point coordinates is wider than the width of a graphic area displayed using fixed point coordinates. Usually, in the case of fixed-point coordinates, the width of the coordinate value is about tens of thousands of bytes at most.

Assume now that the lower limit value of the X coordinate value displayed in floating point coordinates is XL and the upper limit value is Xu, and the lower limit value of the X coordinate value displayed in fixed point coordinates is xL and the upper limit value is Xu.

Coordinate conversion means 3 converts the X coordinate value displayed in floating point coordinates
Therefore, the value when converted into fixed point coordinates may be smaller than the lower limit value xL or larger than the upper limit value xLl.

That is, when converting graphic data displayed in floating point coordinates to fixed point coordinates, coordinate values outside the limits of fixed point coordinates may be obtained.

According to the conventional file conversion method, the inspection means 6 inspects whether the coordinate values converted to fixed-point coordinates are outside the limit values (lower limit xL to upper limit Xu).

If the coordinate value is outside the limit value (lower limit value XL to upper limit value xu), the coordinate value is automatically rounded down.

In FIG. 3, for example, the coordinate values of graphical element A, graphical element B, and graphical element A after being converted to fixed decimal point coordinates are within the limit values (lower limit value xL to upper limit value xu), but the graphical element C
The coordinate values converted to integer coordinates are the limit values (lower limit xL ~
is outside the upper limit xu).

Therefore, when converting graphic data displayed in floating-point coordinates to fixed-point coordinates, not only a part of the graphic data (graphic element C) is not displayed on the display screen 4, but also the graphic data that is not displayed disappears. There was a problem with this.

[Means for solving problems]

As shown in the principle diagram in Figure 1, the above problem is that file 1 stores graphic data in the first information format,
When mutually exchanging the graphic data stored in file 1 and file 2, the conversion means 3 converts the graphic data into the corresponding information format, and the conversion means 3 converts the other This problem can be solved by providing a checking means 6 for checking whether the graphic data converted into the information format has a value outside the limits of the information format.

[Effect]

According to the present invention, when the graphic data in the first information format stored in the file 1 is converted by the converting means 3 into the graphic data in the second information format, the checking means 6 determines that the information format is the information in the file. Graphical data determined to be out of format or outside the limits due to format conversion is stored in the first information format, and the information format of the stored graphical data is checked to see if it matches the format in the file. is detected, so the graphic data will not be lost even when returning to file 1 again.

〔Example〕

FIG. 2 is a diagram showing an embodiment of the file conversion method according to the present invention.

In the figure, 5A is a constant region, 5B is a specific region, and 7 is a control section.

According to the present invention, when the control section 7 transfers the graphic data in the file 1 to the file 2, the control section 7 reads the graphic data in the file 1 and inputs it to the conversion means 3.

After converting means 3 converts graphic data displayed in floating point format into fixed point format, checking means 6 checks whether the converted fixed point coordinate value is outside a limit value or not.

If it is within the limit value, it is stored in the constant area 5A in the file 2, and if it is outside the limit value, it is stored as a floating point in the specific area 5B.

Of course, the graphic data stored in the specific area 5B cannot be displayed on the display screen 4, but when the graphic data is read from the specific area 5B, it is returned to file 1 as it is, so the graphic data is lost. There will be nothing left to do.

[Invention effect]

As explained in detail above, according to the present invention, when graphic data displayed in floating point coordinates is converted to graphic data displayed in fixed point coordinates and then converted back to floating point coordinates, some This has the great effect of preventing data loss.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 2 is a diagram showing an embodiment of the file conversion method according to the present invention. FIG. 3 is a diagram showing an example of a conventional file conversion method. In the figure, 1 is a file in which figure data is displayed in floating point coordinates, 2 is a file in which figure data is displayed in fixed point coordinates, 3 is a conversion means, 4 is a display screen, 5A is a stationary area, and 5B is a The specific N area 7 is a control section.

Claims (1)

[Claims] File (1) storing graphic data in a first information format
, a file (2) that stores the graphic data in the second information format;
), a conversion means (3) for converting the graphic data stored in the file (1) and the file (2) into graphic data in the corresponding information format when mutually exchanging the graphic data stored in the file (1) and the file (2); and inspection means (6) for inspecting whether the graphic data converted into the other information format by step 3) has a value outside the limits of the information format, and the inspection means (6) The converting means (
3) A file conversion method characterized by transfer without going through.