JPH03240166A - Display method for equipment drawing - Google Patents

Abstract

PURPOSE:To attain the accurate display of echoes by drawing a vector equal to an existing vector on a maintenance drawing together with a vector which connects an end point of a maintenance subject vector and both ends points of the existing vector in a background color and an existing color respectively. CONSTITUTION:The coordinate value of an end point P of a new vector 6B connected to a point except the end point of an existing vector 6A set on a screen 3 is obtained via correcting calculation based on the pick input coordinate value. Then a vector (old existing vector) 6C equal to the vector 6A is drawn in a storage area 4 storing a maintenance drawing in a background color. At the same time, the vectors (new existing vectors) 6D1 and 6D2 covering both end points of the vector 6C through the end point P are drawn in an existing color. Furthermore the vector 6B is drawn in a new color respectively. The maintenance drawing thus obtained is put on the present equipment drawing and displayed on the screen with preference. Thus the vector 6B is displayed in echoes in a state where the vector 6B is displayed in echoes in a state where the vector 6B is connected with a point on the vector 6A defined as an end point.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a method for displaying equipment drawings managed by a host computer on a screen, and in particular data maintenance of graphical elements for current equipment drawings, that is, Information on methods for new construction, modification, or removal.

B1 Overview of the Invention The present invention uses a host computer and a graphic display device to create a maintenance drawing by drawing maintenance input graphical elements in a color according to the type of maintenance, separately from the current equipment drawing, through a maintenance input operation. In the method of displaying the maintenance input echo by overlaying this with the current equipment drawing, for new installation or partial removal of a vector whose endpoint is a point other than the endpoint on the existing vector, the maintenance target vector is drawn on the maintenance drawing. In addition, by drawing a vector that is the same as the existing vector and a vector that connects the end point of the vector to be maintained to both end points of the existing vector in the background color and the existing color, respectively, the maintenance vector and the relevant vector can be drawn for the end point. This is to prevent existing vectors from being displayed out of alignment.

C. Conventional technology In public works such as electricity, water, and gas, drawings depicting the facilities on street maps are used to plan and manage facilities such as power lines, telephone lines, and gas pipes laid in the area. There is. It is necessary to reflect the information collected from each district in such drawings, but in order to process the information accurately and quickly and to carry out operational work efficiently, recently computer-based equipment drawing display devices are being used. is used.

As shown in Fig. 3, this device is composed of a host computer 1 and a graphic display device 2, and the host computer manages street maps and equipment drawings corresponding to the street maps. The drawing data in the range is cut out and sent to the graphic display device 2, and the graphic display device 2 registers the drawing as segments in the segment buffer.After that, it is drawn and displayed in the frame buffer. In addition, in recent years, when starting up a system, all drawing data is sent from the host computer 1 to the graphic display device 2 to register segments, and when a display request is made, the host computer calculates 1 m! A system has been developed in which the graphic display device 2 specifies only the display range, and the graphic display device 2 cuts out and displays the drawing data in the display range. Data transmission and segment registration processing are no longer necessary, and high-speed display of the − layer is realized.

Here, the graphic display device 2 will be briefly described with reference to FIG. 2 in the figure. is the host interface (HIF)
), 22 is a segment buffer (SB), SB
Reference numeral 22 is a memory that stores drawing data in descriptive representation (numerical values, symbols) as a hierarchical structure.

From the drawing data stored in this 5B22, the drawing data in the range required for display (a rectangular area determined by the world coordinate values) is cut out. This cutting process involves a matrix calculator (MTX) 23°CRT monitor (CRT) 24 that performs parallel translation and rotational transformation of the displayed figure.
A clipping device (CLP) 25 or the like is provided that removes the portion extending out of the displayable area corresponding to the image. Furthermore, the line segment of the drawing data of the cut out descriptive expression is
) 26 is prepared. Video interface (VIF)2. is FB2. The color code of the look-up table (LT) 29 is read out and a video signal to the CRT 24 is generated, etc. by reading out the contents of the pixel and using the pit string corresponding to each pixel as an address.

2. 21. is a central processing unit (CPU) that analyzes input information of the host computer. is an input device (rM) for inputting various information by an operator.

Such an equipment drawing display device naturally has a maintenance function for the drawings it manages. The maintenance input operation is required to be easy to operate in order to ease the burden on the operator and improve work efficiency. One of the functions that meets this demand is to echo-display graphic elements input for maintenance in a color representing the maintenance type (new installation/change/removal). In other words, when removing a graphic element, the graphic element is removed in color 1 When a new graphic element is created, the graphic element is in new color 1 When a graphic element is changed, the graphic element before the change is the removed color and the graphic element after the change is new Display echo in color.

In order to realize such an echo display, a method can be considered in which the data contents of the current drawing are directly processed in response to input. For example, in the case of removing a graphic element, the graphic element is deleted from the current drawing. However, there is a problem with this. First, if a problem such as a system failure occurs during maintenance input operations, the data content cannot be guaranteed. In other words, there is a possibility that it will not be possible to return to the original current drawing content. Second, when the maintenance input operation is stopped and the original current drawing is displayed, it is necessary to perform a process of returning the graphic elements for which maintenance input has been made to the current contents one by one, which requires processing time.

In order to solve these problems, the present inventor has considered the following method as a detailed explanation of the present invention. That is, through a maintenance input operation, a maintenance drawing is created by drawing a maintenance input figure element in a storage area for maintenance drawings at a specified position corresponding to the current drawing in a color corresponding to the maintenance type (new installation, modification, or removal).
This drawing is superimposed on the current equipment drawing and displayed on the screen to display an echo of the maintenance input graphic element, and the maintenance drawing is deleted from the screen to return the screen to the content of the current equipment drawing.

This method is advantageous in that the current equipment drawing can be protected from maintenance input processing and the screen can be returned to the current equipment drawing content easily and quickly.

D1 Problems to be Solved by the Invention Now, in a drawing stored in a segment buffer of a host computer or a graphic display device, the position of each graphic element is defined in a so-called world coordinate system. Furthermore, in the frame buffer of a graphic display device, the position of each graphic element to be drawn as a dot is defined in a so-called screen coordinate system.

The world coordinate system has a much wider defined area than the screen coordinate system. When displaying a drawing on a screen, the drawing data in the display range is extracted from the drawing and drawn in a frame buffer. The area cut out in a drawing is called a window, and the area drawn in a frame buffer is called a pew port. As a relative display method, if the ratio of the size of the window to the window is large, the display is enlarged, if it is small, the display is reduced, and if the ratio is the same, the display is displayed at the same size. In the case of enlarged display, one coordinate type position in the world coordinate system corresponds to several dots in the screen coordinate system. For example, on the drawing, (X, Y) and (
The two figures located at the positions (X+I, Y) are displayed several dots apart when displayed on the screen. Therefore, even slight differences in coordinate values cannot be ignored.

There are graphical elements in a drawing that are expressed as vectors (line segments).
In the maintenance input operation, a new vector may be branched from a point other than the end point on the existing vector.

In addition, a partial vector from a point other than the end points of the existing vector to another point may be removed.

In the case of these criminals, the coordinate values of the new vector end point or the partial removal vector end point on the existing vector can be found by correcting the coordinate values input with a stylus pen etc. so that they lie on the existing vector. . For this correction calculation, coordinate calculation is most often used to find the closest point on the existing vector from the pick input point, in other words, the intersection of the perpendicular line from the pick input point to the existing vector and the existing vector.

Using the obtained coordinate values, a new installation vector or a partial removal vector is drawn on the maintenance drawing in a display color that indicates the type of maintenance transfer, and is superimposed on the current equipment drawing and displayed on the screen for echo display.

In the above, if the existing vector is oblique, the coordinate value of the new hector connection end point determined by correction calculation.

Calculation errors due to rounding or truncation of the partial removal vector end point coordinate values become noticeable as described above when displayed on an enlarged screen. That is, even if the end point is on the existing vector in the drawing, it may deviate from the existing vector when displayed on an enlarged screen. As a result, when displayed overlappingly with the existing equipment drawing, the new installation vectors are displayed as being separated or protruding from the existing vectors, and the partial removal vectors are displayed offset from the existing vectors. To illustrate this situation, FIG. 5 is a diagram showing a state in which a new vector 4B drawn in the storage area 4 for maintenance drawings is displayed superimposed on the existing vector 4A on the screen 3.
Further, FIG. 6 is a diagram showing how the partial removal vector 5B is displayed superimposed on the existing vector 5A. From these figures, it is possible to understand the separation of newly installed vectors and the positional shift of partially removed vectors.

The present invention was made against this background,
The purpose of this is to obtain the advantages of the methods already considered as described above, and to enable accurate echo display of vectors to be newly installed or removed even when the display is enlarged.

Means for Solving Problem E9 The present invention performs maintenance by drawing a maintenance input figure element in a storage area for maintenance drawings in a specified position corresponding to the current equipment drawing in a color according to the maintenance type by a maintenance input operation. Create a drawing, and for vectors whose endpoints are points other than the endpoints on the existing vector among the maintenance input graphic elements,
Find the coordinate values of the end points by performing a correction calculation based on the pick input coordinate values, and draw a vector in the existing color on the maintenance drawing from the end point having the coordinate values found by the correction calculation to both end points of the existing vector. At the same time, by drawing the same vector as the existing vector in the background color and displaying the maintenance drawing superimposed on the current equipment drawing on the screen, the maintenance input echo display is displayed so that the maintenance person's vector does not deviate from the existing vector. It is characterized by the fact that

F. Embodiment In the embodiment of the present invention, for example, when a maintenance input operation for installing a new graphic element is performed, the maintenance input graphic element is drawn in the new installation color in the storage area for maintenance drawings at a specified position corresponding to the current equipment drawing. It will be done. If the newly created graphical element includes a vector and the endpoint of this vector is a point other than the endpoint on the existing vector, processing is performed as shown in FIG. First, a new vector 6B is connected to a point other than the end point of the existing vector 6A on the screen 3.
The coordinate value of the end point P is determined by correction calculation based on the pick input coordinate value. Next, there is a storage area for maintenance drawings (illustrated as a virtual screen based on the coordinates).

) 4, a vector 6C that is the same as the existing vector 6A (hereinafter referred to as the "old existing vector") is drawn in the background color, and a vector from both end points of the old existing vector 6C to the aforementioned end point P (hereinafter referred to as the "new existing vector") is drawn in the background color. .)6D,,6D,
Draw in the existing color, and then draw the new vector 6B in the new color. When the maintenance drawings obtained in this way are superimposed and displayed on the screen so as to be displayed preferentially on the current equipment drawings, the old existing vector 6C (6A) indicated by the dotted line sinks into the background and is not displayed, and the new vector 6B The end point P of is displayed on the new existing vectors 6D, , 6D2. That is, the new vector is echo-displayed in a state where it is connected to the existing vector using the points on the existing vector as end points.

Figure 2 shows the processing when a vector is included in the removed graphic element and the endpoints of this vector correspond to two points other than the endpoints on the existing vector in a maintenance input operation to remove a graphical element. FIG. In this example, first, the coordinate values of both end points Q, Q, of the vector (hereinafter referred to as "partial removal vector") 7B to be removed from the existing vector 7A are determined by correction calculation based on the big coordinate values. Next, in the same manner as in the previous example, an old existing vector 7C identical to the existing vector 7A is drawn in the background color in the storage area 4 for maintenance drawings, and a line is drawn from both end points of the old existing vector 7C to the above two end points Q, Q2, respectively. Draw the extending new existing vectors 7D, 7Dt in the existing color, and further draw the partial removal vector 7B in the removal color. When the maintenance drawing thus obtained is superimposed on the current drawing and displayed on the screen, the partial vector to be removed is echo-displayed as if it completely overlapped with the existing vector.

Effects of the G7 Invention As described above, according to the present invention, the maintenance drawings include:
A vector that is the same as the existing vector and a vector that connects the endpoints of the vector that is subject to maintenance, for example, new installation or removal, and the both endpoints of the existing vector are drawn in the background color and existing color, respectively, so it is easy to use during maintenance input operations. , if there is an input to create a new vector whose endpoint is a point other than the endpoint on the existing vector, the new vector will not separate or protrude from the existing vector even if it is enlarged, and the new vector will not be separated from the existing vector. Can be accurately echoed to connect to existing vectors. Similarly, if there is an input to remove a partial vector from a point other than the endpoint on an existing vector to another point, the partial removal vector will not shift from the existing vector and will completely overlap even if it is displayed in an enlarged manner. Accurate echo display is possible.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram showing another embodiment of the invention, Fig. 3 is an overall configuration diagram showing an equipment drawing display device, and Fig. 4 is a graphical display. FIG. 5 is a block diagram showing the overall configuration of the device, FIG. 5 is an explanatory diagram showing the state of separation due to the installation of a new vector, and FIG. 6 is an explanatory diagram showing the state of positional shift due to the removal of the vector. l...Host computer, 2...Graphic display device, 3...
Screen, 4... Storage area for maintenance drawings. Figure 1 Pig first □lo regulation tomoe Figure 2 I Tomoe O real cypress now'+01L light diagram Figure 5 vector to body setting I1 separation 9 Rokugang Q1 to one hand H guidance Figure 3 Shell 4f ! Figure 4

Claims (1)

[Claims] (1) The host computer manages the equipment drawings, which are superimposed equipment drawings on the street maps, cuts out the drawing data in the display range according to display requests and displays it on the screen, and stores it in the storage area for maintenance drawings through maintenance input operations. A maintenance drawing is created by drawing the maintenance input graphic element in a color according to the maintenance type at a specified position corresponding to the current equipment drawing, and this drawing is superimposed on the current drawing and displayed on the screen. In the drawing display method that performs echo display of The coordinate values are determined by correction calculation based on the pick input coordinate values, and on the maintenance drawing, a vector from the end point having the coordinate value obtained by the correction calculation to both end points of the existing vector is drawn in the existing color. , draw the same vector as the existing vector in the background color,
An equipment drawing display method characterized in that by displaying the maintenance drawing superimposed on the current equipment drawing on a screen, echo display of maintenance input graphic elements is performed so that the maintenance vector and the existing vector are not displayed out of sync.