JPS62287371A - Graphic output device - Google Patents

Abstract

PURPOSE:To obtain a drawn picture being free from a read error of a symbol, by erasing the shape picture element data of a symbol area, in case shape data and symbol data which have been stored in a data base are superposed, when they have been drawn. CONSTITUTION:First of all, the shape data outputted from a shape data output means A is converted to the shape picture element data by a shape raster graphics means B, and stored in a frame storage means C. Subsequently, from a symbol data outputted from a symbol data output means D, the symbol area are calculated by a symbol area calculating means E. Next, the shape picture element data in the frame storage means C corresponding to the symbol area are erased, and after the erasion, the symbol data are converted to the symbol picture element data by a symbol raster graphic means G, and stored in the frame storage means C. Both the data which have been stored in the frame storage means C are drawn in a picture drawing means H.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a graphic output device for drawing CAD (Computer Aided Digital) graphics.

[Prior Art] Conventionally, as an apparatus for creating drawings from figures created by CAD, an apparatus having a configuration as shown in FIG. 6 has been used. That is, the device includes a host computer terminal (CAD terminal CT) that constitutes the main part of the CAD device,
A database DB that stores shape data and symbol data, such as dimension character data, inputted from the CAD terminal CT.
a controller RC that reads shape data and dimension character data from the database DB, performs raster graphics on the data in units of display dots, and converts the data into shape drawing data and dimension character drawing data; A frame buffer FB that temporarily stores data and dimension character drawing data in a frame memory corresponding to a set of display dot units in a graphic area;
Printing device (plotter) that prints the contents of and creates drawings
It consists of PS. In this device, the seventh
As shown in the flowchart in the figure, first, the shape data of the shape line other than the dimension character (45) in Figure 8 is read from the database DB, converted to shape drawing data using /ν, and stored in the frame buffer FB. (Step SA).

Next, the dimension character data is read from the database DB, converted into dimension character drawing data, and then stored in the frame buffer FB (step SB). Then, both of the stored data are printed using the printing device PS (prons 1 to 1).
)do.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technique, as shown in FIG. There were problems in which the text became difficult to read, or in some cases, was misread. Therefore, conventionally C
At the AD stage, the dimension characters may be slightly modified as shown in Figure 9, the position of the dimension characters may be modified as shown in Figure 10, or the dimension characters may be first modified as shown in Figure 11. After deleting and correcting the shape line in the dimension text display area where the dimension text is drawn, additional corrections were made to draw the dimension text again.

Therefore, in the conventional technique, in addition to adding processing at the CAD stage, there was a problem in that part of the shape data stored in the database was changed.

[Means for Solving the Problems] As a means for solving the above problems, the present invention, as shown in FIG. , a shape raster graphics means B for converting the shape data into shape pixel data, a frame storage means C for storing the shape pixel data in correspondence with the coordinate values of the graphic area, and coordinate values and symbols of the graphic area. symbol data output means for outputting symbol data consisting of values; symbol area calculation means E for calculating a symbol region in which a symbol is drawn based on the coordinate values and symbol values of the symbol data; and the above of the frame storage means C. symbol area calculating means F for erasing the memory of the shape pixel data corresponding to the symbol area; symbol raster graphics means G for converting the symbol data into symbol pixel data and storing it in the erased area; , a drawing means for drawing symbols and shapes stored in the frame storage means C;

The shape data is, for example, graphic data output from a CAD device, and includes geometric parameters such as the coordinates of the starting point and end point of a straight line, and the center coordinates and radius of a circular arc.

The above-mentioned symbol data is, for example, a character, a character, etc., and is a combination of a character indicating the content of the character, etc., and a coordinate indicating the position.

The shape pixel data is, for example, a result of converting the geometric parameters of the shape into a set of pixels that depict the shape.

The symbol pixel data must be, for example, the value and coordinates of a symbol converted into a set of pixels that depict the symbol.

The frame storage means C is, for example, a RAM in the computer that is set corresponding to a graphic area including shapes and symbols, and stores pixel values for drawing shapes or symbols.

[Operation] In the present invention, the shape data output from the shape data output means A is first converted into shape pixel data by the shape raster graphics means B, and then stored in the frame storage means C. Next, the symbol area is calculated by the symbol area calculation means E from the symbol data output from the symbol data output means. Then, the shape pixel data in the frame storage means C corresponding to the symbol area is erased. After the above erasure, the symbol data is converted into symbol pixel data by the symbol raster graphics means G and the frame storage means C
is memorized. Both data stored in the frame storage means C are drawn on the drawing means H.

That is, for example, graphic data BB consisting of overlapping shape data and symbol data as shown in FIG.
In the controller shown in FIG. 2(B), processing of paths 1 to 3 is performed, and the drawing data in the frame buffer changes as shown in FIG. 2(C). That is, in path 1, graphic data BB is converted into shape pixel data D1 and stored in the frame buffer. Next, in path 2, the symbol area of the symbol data is calculated, the symbol area of the frame buffer is erased, and the frame buffer enters the storage state of shape pixel data D2 after erasing the symbol area. Then, in path 3, the symbol data 8B is converted into symbol pixel data and stored in the symbol area of the frame buffer, and the frame buffer becomes drawing data D3 having no shape on the symbol. Incidentally, FIG. 3 shows a flowchart of the processing performed on routes 1 to 3 in FIG. 2 above. First, shape data is converted into shape pixel data and stored in a frame buffer (step S1). Next, a symbol area is calculated from the symbol data, and the symbol area in the frame buffer is erased (step S2>. Then, the symbol data is converted into symbol pixel data and written in the symbol area of the frame buffer.
It is made obsolete (step S3). That is, in this flowchart, steps 81 to S3 are performed corresponding to routes 1 to 3 in FIG. 2 above.

Therefore, according to the present invention, line drawings are not drawn superimposed on characters, making them easier to read.

[Example] An example of the present invention is shown in FIGS. 4 and 5. FIG. 4 is a configuration diagram of this embodiment. In the figure, the host interface H1, the input device interface
Data memory DM, drawing processor PP, control processor C
P, data bus SS, frame memory FM, drawing device PS, etc. are shown. The host interface H1 is used to input shape data and dimension character data (not shown) from a host computer storing the data. Above input device interface K
I is used to input data from 8th grade into the keyboard. The data memory DtVH is R A fVl which temporarily stores the shape data and dimension character data.

The drawing proscenor PP is an arithmetic element that performs rask conversion of shape data and dimension character data and calculates a dimension character display area.

The control processor CP controls each of the above parts, inputs/outputs,
This is an arithmetic element that executes rask conversion, calculation of dimension character area, etc. The frame memory FM is a RAM that stores both of the rask-transformed data. The drawing device PS is a plotter, a display, or the like that draws the drawing data in the frame memory FM.

Based on the above device configuration, flowchart 1-
The control of this embodiment is performed as shown in FIG.

That is, first, shape data is input from the host computer (step 100) and dimension character data is input (step 110). Next, rask conversion of the shape data to shape drawing data (raster graphics)
(Step 120), and stores the shape drawing data in the frame memory FM (Step 130). Next, a dimension character display area is calculated from the dimension character data (step 140). The dimension character display area in the frame memory FM is cleared (step 150). After the above clearing, the dimension character data is rask-converted into dimension character drawing data (step 160) and stored in the dimension character display area of the frame memory FM (step 170). Then, the drawing data in the frame memory FM is drawn by the drawing device PS (step 180). As explained above, by using this embodiment, even if shape data stored in the host computer and dimension character data overlap when drawn, after the dimension character display area of the shape drawing data is erased, Since the dimension character drawing data is stored in the frame memory FM, when the drawing data is drawn by the drawing device PS to form a drawing, the shape lines and the dimension characters are not drawn in an overlapping manner. Therefore, this embodiment can provide a graphic output device that outputs easy-to-read graphics.

[Effects of the Invention] In the present invention, the shape data output from the shape data output means A is converted into shape pixel data by the shape raster graphics means B, and is stored in the frame storage means C. Next, the symbol area is calculated by the symbol area calculation means E from the symbol data output from the symbol data output means. Then, the shape pixel data in the frame storage means C corresponding to the symbol area is erased. The above erasing Q) Later, the symbol data is converted into symbol pixel data by the symbol raster graphics means G and the frame storage means C
is memorized. Both data stored in the frame storage means C are drawn on the drawing means H.

Therefore, according to the present invention, for example, if shape data stored in a database and symbol data overlap when drawn, the shape pixel data of the symbol area is erased, and the pixels of both data overlap and are drawn. It will no longer be done. As a result, it is not necessary to use a CAD device to correct the state in which the shape line and the symbol overlap, and it is possible to draw the symbol without making it difficult to read or misreading the symbol due to the overlap. Moreover, since the data output from the CAD device and stored in the database is not changed, the reliability of the data is increased.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of a graphic output device of the present invention, FIGS. 2 and 3 are explanatory diagrams for explaining the present invention in detail, and FIG. 4 is an illustration of an embodiment of the present invention. 5 is a flowchart showing the control of this embodiment, FIG. 6 is a block diagram showing a conventional configuration, FIG. 7 is a flowchart showing conventional control, and FIGS. 8 to 11 are flowcharts showing the conventional control. It is an explanatory diagram for explaining an example. A... Shape data output means B... Shape raster graphics means C... Frame storage means D... Symbol data output means E... Symbol area calculation means F... Symbol area calculation means G.・・Symbol rask graphics means ・・・Drawing means

Claims (1)

[Scope of Claims] Shape data output means for outputting shape data other than symbols of a graphic region; shape raster graphics means for converting the shape data into shape pixel data; frame storage means for storing data corresponding to the values; symbol data output means for outputting symbol data consisting of coordinate values and symbol values of the graphic area; symbols are drawn based on the coordinate values and symbol values of the symbol data; symbol area calculating means for calculating a symbol area; symbol area erasing means for erasing the memory of the shape pixel data corresponding to the symbol area in the frame storage means; and converting the symbol data into symbol pixel data, A graphic output device comprising: symbol raster graphics means for storing symbols in erased areas; and drawing means for drawing symbols and shapes stored in the frame storage means.