JPS6318430A - Drawing displaying system - Google Patents

Abstract

PURPOSE:To allow both a picture redisplayed from a segment and another picture transferred from a host to coexist in a mixed state by setting a displaying frame with a previously stored displaying extent to the picture transferred from the segment and receiving an instruction of a rectangular area to be expanded from the picture. CONSTITUTION:Upon receiving a request of a partial expansion process from a terminal, it is discriminated whether or not the currently displaying drawing is a redisplaying drawing from a storage segment buffer 8 by referring to a segment registering list memory 7. In the case of the redisplaying drawing, the displaying extent of the drawing when the drawing is registered is read out from a displaying extent list memory 5 and a virtual screen 23 is set in the picture 91 by using the extent. Then two apexes 94 and 95 on once diagonal line of a rectangular section 93 which is to be displayed in an expanded state are designated from the drawing 91. Since the screen 21 is set, coordinate values of the two apexes are obtained. Thereafter, the display is performed by using the coordinate values of the two apexes as displaying extent data 90. Since this partially expanded display is realized in the above-mentioned way, a partially expanding process can be carried out to a redisplaying picture from the buffer 8 in the same way as that to a picture transferred from a host.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to graphic display processing, and more particularly to a drawing display method suitable for displaying drawings on the screen of a graphics terminal having a storage segment.

[Conventional technology]

When displaying drawings on a graphics terminal, there are two methods: directly transferring data from a host computer and displaying it, and storing data in a storage segment in advance and redisplaying the storage segment.

Graphics standard systems previously proposed by the United States:
Core system A (Core 8 system) 1
fcn.

A system that expands it (for example, HITAC program product) VO83 interactive control function program, 7A
In IGCF IX Volume 2 COBEN 8YSTEV Interface Edition (8090-7 to 025-10) pages 70 to 72), the following steps are taken when displaying a drawing on the display. As shown in FIG. 2, first, a display frame (virtual screen) 23 is defined on a projection plane 22 placed perpendicular to the line of sight 20 in a user-arbitrary coordinate system 21 called a world coordinate system. The contents of this virtual screen are projected onto a display area 25 on a logical display surface called a normalized device coordinate system (NDC) 24. The corresponding physical display surface (
The drawing is drawn at a position on the device coordinate system) 26. In the storage segment, a graphic drawn on the display screen and designated to be registered is stored in correspondence with the NDC. Virtual normalized coordinate system (VNI) for screens redisplayed from storage segments
By providing C), it is possible to convert the display frame for the contents of the storage segment.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the screen redisplayed from the storage segment does not have information about the virtual screen size at the time of segment registration and is displayed from the NDC definition frame, so no virtual screen frame is defined. Therefore, the coordinate values in the drawing corresponding to the specified position on the screen cannot be obtained. Further, there is a problem that partial enlarged display cannot be performed unless the virtual normalized coordinate system (VNDC) is used and the display is converted into one display frame f.

゛ The purpose of the present invention is to display a redisplay screen from a segment, and □
The purpose is to allow mixed images to be transferred from the host, to be conscious of the display method, and to realize partial enlargement processing with the same operation.

[Means to resolve the problem]

The above purpose is to memorize the display range of one drawing data, and when displaying a drawing from a memory segment, set a virtual plane meeting in the display range by overlapping the drawing, and move the coordinates of the corresponding drawing from the specified position on the screen. This is achieved by allowing input of values.

[Effect]

Even if the currently displayed drawing is a redisplay screen from a segment, the coordinate values of the two end points of the diagonal of the rectangle specified with the graphic cursor are received from the first screen, and these two points are used as the lower left and upper right corners of the display frame. Set up a new virtual screen,
The operation for partial enlargement in which drawing data is transferred from the host computer and displayed is the same as the partial enlargement method for host transfer data. Furthermore, since the segment redisplay screen and the host transfer screen can be processed without distinction, the memory can be used effectively within the memory limit of the stored segment buffer.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an apparatus using a display method according to the present invention. 12 is processing on the host computer side,
13 is processing on the terminal side. Drawing information file IFi,
Stores the plot data of the drawing to be displayed with a name for each screen. The display control unit 2 controls selection and registration of display drawings, registration in segments, screen display, reception and analysis of commands, etc. The display ratio data memory 3 stores the display aspect ratio of each drawing at the time of registration. The display range calculation unit 4 uses the data in the memory 3, or.

The xy coordinate values of the lower left corner and upper right corner of the virtual screen displaying one drawing are calculated according to the display aspect ratio input from the terminal. In the display range list memory 5, the corresponding coordinates when one drawing is registered +
i[ is stored for each drawing. The virtual screen setting section 6 sets a virtual screen according to the data in the memory 5 or the coordinate values calculated by the calculation section 4 based on the input data from the terminal. The segment registration list memory 7 stores whether or not a drawing is to be registered in the storage segment buffer 8, and the segment number in the case of registration. The drawing processing section 9 creates drawing data for the screen. The display section 10 includes a virtual screen setting section 6, a drawing processing section 9. or.

The friend data transferred from the storage segment 8 is displayed on the display screen. Reference numeral 11 denotes an input section for receiving command input.

FIG. 3 shows the contents of the segment registration list memory 7.

71 is a registered drawing number, 72 is a drawing name, and 73 is a segment registration number. For drawings that are not registered in the segment buffer 8, the segment registration number 73 is set to O.

FIG. 4 shows the contents of the display ratio data memory 3.

41 is the drawing number, and 42.43 is the display ratio in the x and y directions.

FIG. 5 shows the contents of the display range list memory 5.

51 is the drawing number, 52 is the x in the lower left corner and upper right corner of the virtual screen
This is the y-coordinate value.

Next, the operation at the time of registration will be explained using FIGS. 1 and 6.

FIG. 6 is a flowchart showing the process when registering one drawing. t
& First, in step 101, enter the display drawing name from the input section, and
Upon receiving a command to check whether a segment has been registered or to request a process end, the process goes to step 102 to determine whether or not it is a request to end the process. If it is not a termination request, a drawing to be displayed in step 103 of FIG. 6 is selected among the drawings in the drawing information file 1 of FIG. 1, and a segment registration restore is created in step 104. In step 105, the display range is determined based on the display aspect ratio of the memory 4 and is registered in the display range memo IJ5. A virtual screen is set in step 106 using the corresponding display range. In step 107, it is determined by referring to all memories 7 whether or not the @ side is to be registered in segment 8. If it is to be registered, opening processing for segment 8 is performed in step 108. In step 109, drawing processing is performed on the display, and in step 110, if the drawing is a segment registration drawing, in step 111, segment 8 is closed. This completes the registration process for one drawing, and the process proceeds to step 101 for command input processing.Next, the operation of the display section will be explained using FIGS. 1, 7, and 9. FIG. 7 is a flowchart showing processing when displaying a drawing, and FIG. 9 is an explanatory diagram of data flow. In step 121, a command for display processing, enlargement processing, or processing termination request is received from the terminal, and a determination is made in step 122. In the case of display processing, the registration list memory 7 is searched in step 123, and
In step 124, it is determined whether the drawing is a segment registration drawing, and in step 125, the segment registration drawing is transferred from the segment buffer 8 and redisplayed. That is, the route is shown in FIG. 98. For unregistered drawings, see Figure 9 96 or 97
go through the route of In step 126, the display range is memorized 1.
It is determined whether the range is to be changed from the range stored in step 15, and if the range is to be changed, the display range is calculated in step 127. (However, the contents of the memory 5 are not rewritten.) If not changed, the display range list memory 5 is referred to in step 128. Using the display range, the virtual screen 23 is set in step 129, and drawing processing is performed on the display in step 130. In other words, if you want to change 1 display range, 97. If not changed, it is 96. This completes the display process for one drawing, and returns to the command input process in step 121.

Next, the operation of partial enlargement processing during display will be explained using FIGS. 1, 8, and 9. Figure 8 is.

FIG. 3 is a flow diagram of partial enlargement processing in this method.

When there is a request for partial enlargement processing from the terminal, step 1
In step 41, the registered restore is referred to, and in step 142, it is determined whether the currently displayed drawing is a redisplayed drawing from segment 8. 99 for the reproduced drawings according to FIG.
Then, as shown in step 143, the display range at the time of registration of the drawing is read out from the display range list memory 5, and the display range at the time of registration of the drawing is read out.
In step 44, the virtual screen 23 is set on the currently displayed drawing 91 using the range. In step 145, as shown in FIG. 9, two diagonal vertices 94 and 95 of a rectangular portion 93 to be enlarged are designated with a graphic cursor in the drawing 91 displayed on the screen. Since the virtual screen 23 is set, the coordinate values of the two vertices can be obtained. As shown in 92, the coordinate values of the two vertices are transferred as display range data 90.

97 routes are displayed. That is, a virtual screen is set in step 146, and drawing processing is performed in step 147. Since partial enlargement display is achieved using the above method, partial enlargement processing can be performed on the redisplay screen from the segment buffer using the same operations as on the host transfer screen.

〔Effect of the invention〕

According to the present invention, it is possible to enlarge the screen redisplayed from the segment buffer using the same operation as the system transfer screen, which allows the mixing of two display methods, and the memory of the storage segment buffer. This is effective in making effective use of information and reducing display operation time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a device using the display method of the present invention;
Fig. 2 is an explanatory diagram of the drawing display method, Fig. 3 is an explanatory diagram of the segment registration list memory, Fig. 4 is an explanatory diagram of the display ratio data memory, Fig. 5 is an explanatory diagram of the display range memory, and Fig. 6 is an explanatory diagram of the display range memory.
Figure 7 is a flowchart showing the processing when registering a drawing, Figure 7 is a flowchart showing the processing when displaying a drawing, Figure 8 is a flowchart of partial enlargement processing in this method, and Figure 9 is a flowchart showing the processing when displaying a drawing. This is an explanatory diagram of the flow.1...Drawing information file%2...Display control section,3.
...display ratio data memory, 4...display range calculation section,
5...Display range list memory, 6...Virtual screen setting section, 7...Segment registration list memo 1c 8...
Storage segment buffer, 9... Drawing processing unit, 10.
...Display section. 11...Input section.

Claims (1)

[Claims] 1. A method for enlarging and displaying a specified rectangular area on the screen of drawing data transferred from the segment or host to the screen of a graphic display terminal having a storage segment in the terminal. , by memorizing the display range of the drawing data in advance, setting the display frame in the display range for the screen transferred from the segment, and receiving the designation of the rectangular area to be enlarged from the screen, the data is stored in the segment buffer. This drawing display method is characterized in that it is possible to enlarge and display drawings transferred to a host using the same process as drawings transferred to a host. 2. The drawing as set forth in claim 1, wherein the above method allows the memory of the storage segment buffer to be used effectively by handling the host transfer screen and the storage segment redisplay screen without distinction. Display method.