JP4409918B2 - Graphic drawing apparatus and program thereof - Google Patents

Description

  The present invention relates to a figure drawing apparatus for drawing a closed loop line parallel to an arbitrary figure.

As is well known, when a conventional graphic drawing apparatus draws a closed loop line parallel to the target graphic, if the target graphic becomes a complex graphic, the amount of calculation increases rapidly and much time is required for drawing. There was a problem of requiring.
Loop line drawing is used for, for example, aircraft route guidance, and is effective for indicating a flightable airspace or a flight-prohibited airspace. Rapid drawing processing is a very important technique for an aircraft flying at high speed. .
On the other hand, conventionally, methods such as those disclosed in Patent Document 1 and Patent Document 2 have been considered, but the above-described problems could not be solved even by these methods.
JP-A-9-270018 JP-A-9-30579

In the case of drawing a closed loop line parallel to the target figure, the conventional figure drawing apparatus has a problem that if the target figure becomes a complicated figure, the amount of calculation increases rapidly and a lot of time is required for drawing. there were.
The present invention has been made to solve the above problem, and even if the target graphic is a complex graphic, it can draw a closed loop line parallel to the target graphic without requiring much time. An object of the present invention is to provide a graphic drawing apparatus and a graphic drawing program that can be used.

  In order to achieve the above object, the present invention provides a first drawing means for drawing each line constituting an original target figure with a pixel width X in a figure drawing apparatus for drawing and visually displaying a figure. A double line parallel to the target graphic is drawn on the graphic drawn by the first drawing means by drawing each line constituting the target graphic with a pixel width Y smaller than the pixel width X using the background color. Second drawing means for drawing and third drawing means for erasing parallel lines outside the target figure out of the double lines drawn by the second drawing means are configured. .

  As described above, in the present invention, each line constituting the original target figure is drawn with the pixel width X, and each line constituting the target figure is drawn on the drawn figure from the pixel width X using the background color. In addition, by drawing with a narrow pixel width Y, a double line parallel to the target graphic is drawn, and among the drawn double lines, a line parallel to the outside of the target graphic is erased.

  Therefore, according to the present invention, it is possible to draw a closed loop line parallel to the target graphic simply by drawing a line having a different pixel width based on the target graphic. Even so, it is possible to provide a graphic drawing apparatus and program for drawing a loop line without requiring much time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration of a graphic drawing apparatus according to an embodiment of the present invention. The graphic drawing apparatus includes an input unit 10, a storage unit 20, a display unit 30, a print unit 40, and a control unit 50.

The input unit 10 receives a request from an operator, and may be a keyboard, a pointing device such as a mouse, or the like.
The storage unit 20 stores the control program of the control unit 50 and various data including control data and graphic data.

  The display unit 30 is a display unit using a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), or the like, and visually displays various information including graphics in accordance with instructions from the control unit 50. Is.

The print unit 40 prints various information including graphics on a paper medium or the like in accordance with instructions from the control unit 50.
The control unit 50 controls the respective units of the graphic drawing apparatus in an integrated manner. The control unit 50 draws a graphic in accordance with a graphic drawing program stored in the storage unit 20 and outputs the drawn graphic on the display unit 30. Or a control function for printing on a paper medium or the like through the print unit 40.

  Next, the operation of the graphic drawing apparatus having the above configuration will be described. In the following description, an operation when a loop line parallel to the target graphic is drawn inside the target graphic will be described. In response to a request from an operator through the input unit 10, the control unit 50 reads a program of a flowchart as shown in FIG. 2 from the storage unit 20, and the control unit 50 performs a control operation according to the read program. Execute.

  First, in step 2a, the control unit 50 accepts designation of a target graphic through the input unit 10, and proceeds to step 2b. The target graphic is obtained by the control unit 50 through a graphic stored in the storage unit 20 in advance or an interface (not shown). Here, it is assumed that the target figure is as shown in FIG.

  In step 2b, the control unit 50 draws each line segment of the target graphic designated in step 2a with a pixel width of “a + 2 × (b + d)” in the drawing area D using a predetermined drawing color, Control goes to step 2c. Here, “a” is the number of pixels in the width of the line segment of the target graphic, “b” is the number of pixels in the width of the loop line, and “d” is the number of pixels in the interval between the line segment of the target graphic and the loop line. (See FIG. 4). Thereby, a figure as shown in FIG. 5 is drawn. The drawing area D is a virtual drawing space on the storage unit 20.

  In step 2c, the control unit 50 draws each line segment of the target graphic designated in step 2a on the graphic drawn in step 2b with a pixel width of “a + 2 × d”, and proceeds to step 2d. The color used here is the background color. For this reason, the graphic drawn in step 2b is in a state where the overlapped portion is erased. Thereby, the figure drawn so far becomes as shown in FIG.

  In step 2d, the control unit 50 draws each line segment of the target graphic designated in step 2a on the graphic drawn up to step 2c with the pixel width of “a” in the drawing color, and proceeds to step 2e. As a result, the figures drawn so far are as shown in FIG.

  In step 2e, the control unit 50 fills the area from the outer periphery of the drawable area to the figure drawn up to step 2d with the drawing color, and proceeds to step 2f. Thereby, the figure drawn so far becomes as shown in FIG.

  In step 2f, the control unit 50 fills the area filled with the drawing color from the outer periphery of the drawable area with the background color, and proceeds to step 2g. As a result, the graphic drawn up to this point is as shown in FIG. 9, and the writing of the loop line to the target graphic is completed.

  In step 2g, the control unit 50 controls the display unit 30 and the printing unit 40 to visually display the graphic drawn on the drawing area D so far on the display unit 30 and to the paper medium from the printing unit 40. Printing is performed, and the process ends.

  As described above, in the graphic drawing apparatus having the above configuration, 1) the target graphic is drawn with a line “a + 2 × (b + d)” that is thicker than the original width “a”, and 2) the target graphic is background. By drawing with a line of width “a + 2 × d” in color, a loop line parallel to the target figure is drawn inside and outside the target figure. 3) The loop line outside the target figure is deleted, and the target figure is deleted. A loop line is drawn inside the.

  Therefore, according to the graphic drawing device having the above-described configuration, it is possible to draw a loop line parallel to the target graphic simply by drawing a line having a different pixel width based on the line segment of the target graphic. Therefore, even if the target graphic is a complex graphic, a closed loop line parallel to the target graphic can be drawn without requiring much time.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. Further, for example, a configuration in which some components are deleted from all the components shown in the embodiment is also conceivable. Furthermore, you may combine suitably the component described in different embodiment.

As an example, for example, in the above-described embodiment, the figure drawn in the drawing area D is displayed on the display unit 30 when the drawing area D on the storage unit 20 with the loop line added to the target figure is completed. However, it may be displayed on the display unit 30 at each step of the flowchart shown in FIG. Further, the drawing of the target graphic performed in step 2d may be performed after step 2e or after step 2f.
In addition, it goes without saying that the present invention can be similarly implemented even if various modifications are made without departing from the gist of the present invention.

1 is a circuit block diagram showing a configuration of an embodiment of a graphic drawing apparatus according to the present invention. The flowchart for demonstrating the drawing process of the figure drawing apparatus shown in FIG. The figure which shows the drawing figure by the drawing process shown in FIG. The figure for demonstrating the relationship between the object figure by the drawing process shown in FIG. 2, and the number of pixels of a loop line. The figure which shows the drawing figure by the drawing process shown in FIG. The figure which shows the drawing figure by the drawing process shown in FIG. The figure which shows the drawing figure by the drawing process shown in FIG. The figure which shows the drawing figure by the drawing process shown in FIG. The figure which shows the drawing figure by the drawing process shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Input part, 20 ... Memory | storage part, 30 ... Display part, 40 ... Print part, 50 ... Control part.

Claims (6)

In a figure drawing apparatus that draws and visually displays a figure,
First drawing means for drawing each line constituting the original target graphic with a pixel width X;
On the graphic drawn by the first drawing means, each line constituting the target graphic is drawn with a pixel width Y narrower than the pixel width X using a background color, so that a double line parallel to the target graphic is drawn. A second drawing means for drawing a line;
A graphic drawing apparatus comprising: a third drawing means for erasing parallel lines outside the target graphic among the double lines drawn by the second drawing means.   2. The image forming apparatus according to claim 1, further comprising: a fourth drawing unit that draws each line constituting the target graphic with a pixel width Z smaller than the pixel width Y after the drawing by the second drawing unit. The drawing apparatus described in 1.   The third drawing means draws from the outer edge of the display area to a line parallel to the outside of the target graphic in the same color as the parallel line and integrates it with the parallel line. The graphic drawing apparatus according to claim 1, wherein lines parallel to the outside of the target graphic are erased by drawing an area with a background color. A figure drawing apparatus program for drawing and visually displaying a figure,
First drawing means for drawing each line constituting the original target graphic with a pixel width X;
On the graphic drawn by the first drawing means, each line constituting the target graphic is drawn with a pixel width Y narrower than the pixel width X using a background color, so that a double line parallel to the target graphic is drawn. A second drawing means for drawing a line;
A program for causing the figure drawing apparatus to function as third drawing means for erasing parallel lines outside the target figure among the double lines drawn by the second drawing means.   5. The apparatus according to claim 4, further comprising fourth drawing means for drawing each line constituting the target graphic with a pixel width Z smaller than the pixel width Y after drawing by the second drawing means. The program described in.   The third drawing means draws from the outer edge of the display area to a line parallel to the outside of the target graphic in the same color as the parallel line and integrates it with the parallel line. 6. The program according to claim 4, wherein lines parallel to the outside of the target graphic are erased by drawing the area with a background color.

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