JPH05173544A - Character and graphic editing device - Google Patents

Abstract

PURPOSE:To execute delicate editing for the form of character and graphic by displaying the coordinate value of a control point which is the closest to a position instructed by An instruction means on a coordinate value display means. CONSTITUTION:This device is provided with the instruction means 10 which instructs a desired position on a display screen, a detection means 50 which detects the control point which is the closest to the position instructed by the means 10 out of the respective control points constituting a contour displayed on a display screen, and the coordinate value display means 60 which displays the coordinate value of the control point detected by the means 50. Then, the coordinate value of the control point which is the closest to the position instructed by the means 10 is displayed on the means 60. Therefore, by designating the position near the desired control point, a user knows the accurate coordinate value of the control point, thereby executing the delicate editing for the form of the character and the graphic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character / graphics editing apparatus for displaying outlines of characters / graphics corresponding to outline data on a display screen.

[0002]

2. Description of the Related Art Conventionally, when a shape in which character / graphic shape data is represented by an outline is created / edited, the shape is displayed on a display, and a pointing device is used for the shape displayed on the display. I try to operate it interactively using the keyboard.

Specifically, since an outline is a set of closed curves consisting of coordinate values and attributes of control points, when changing the shape, one control point, a plurality of control points, one closed curve, and a plurality of closed curves. The closed curve and all the shape data are changed in any of the units.

As a method of knowing the coordinate value of the control point,
"Font issued by Altsys in" January 4, 1990 "
grapher (Ver.3 ・ 0) User Manual, p4,
p27 et al. "(hereinafter referred to as literature) are known. According to the technique described in this document, since the coordinate value of the cursor is always displayed, it is possible to know the approximate coordinate value of the control point if the cursor exists near the control point. it can. It is also possible to know the coordinate value of the control point by displaying a pop-up menu to display the coordinate value of the control point and displaying the coordinate value of each control point by operating the menu.

[0005]

By the way, in the case of subtly changing the shape, it is necessary to operate the pointing device after displaying the shape with a high display magnification.

The reason is that if the outline data is displayed in a bitmap of, for example, 32 × 32 dots per basic unit (for example, one character), the resolution is, for example, 64 vertically.
The outline is displayed in a bitmap with 32 × 32 dots on the display of 0 × 400 dots. However, in such a bitmap display, the user cannot recognize a subtle difference in shape, so it is impossible or extremely difficult to make a subtle change in shape. Therefore, by setting the display magnification of the bitmap of the basic unit to a preset maximum magnification and displaying the bitmap with 100 × 100 dots, for example, even a fine portion can be recognized to some extent. It can be carried out.

However, if the basic unit of actual outline data is represented by a coordinate system of 1000 × 1000 dots, for example, data represented by 1000 × 1000 dots is thinned out to 100 × 1.
Since it is displayed as a bitmap with 00 dots, it is impossible to display the details of the shape faithful to the outline data. Therefore, even if the difference between the displayed actual shape and the desired shape is not known from the appearance alone, when the actual shape is expanded into the bitmap data, there may be a large difference from the desired shape. ..

For example, in the coordinate system of 1000 × 1000 dots, the end points of the line segment represented by the outline data are XY coordinate values (0, 0) and XY coordinate values (10, 50).
In the case of 0), the line segment displayed as a bitmap with 100 × 100 dots on the display may be seen only as vertical. Therefore, since the line segment appears to be vertical, the user determines that the vertical line segment does not have to be edited when it has a desired shape. However, since the line segment is actually inclined to the right, when the outline data is expanded into 32 × 32 dot bitmap data, the shape based on the bitmap data is
It may differ from the desired shape (a vertical line segment in this example).

Therefore, if the coordinate values of the control points of the contour in the shape displayed on the display can be accurately known, it is possible to accurately grasp what the contour is in. For example, in the above example, the line segment is not vertical because the user knows that the x-coordinate value of the coordinate value of each end point (that is, each control point) of the line segment displayed on the display device is different. Therefore, it is possible to correct the line segment.

However, in the technique described in the above document, if there is a cursor that interlocks with the movement of the pointing device on the control point side (near the control point), the coordinate value of the cursor is displayed. However, since the coordinate value itself of the control point is not displayed, it is not possible to know the exact coordinate value of the control point. For example, if you want to know the coordinate value of each of the two control points, you can move the cursor to find (display) the approximate value of each coordinate value, but this value is the exact coordinate value of the control point. is not.

In the method of operating the pop-up menu to display the coordinate value of each control point, the menu display and the operation for the menu, and the menu operation until the coordinate value of the desired control point are displayed. It must be troublesome.

It is an object of the present invention to provide a character / graphics editing apparatus capable of highly accurately editing the shapes of characters / graphics displayed on a screen and corresponding to outline data.

[0013]

In order to achieve the above-mentioned object, the present invention provides a character / text corresponding to outline data.
In a character / graphic editing apparatus for displaying the contour of a figure or the like on a display screen, an instruction means for instructing a desired position on the display screen, and control points constituting the contour displayed on the display screen. The detecting means detects the control point closest to the position designated by the indicating means, and the coordinate value display means for displaying the coordinate value of the control point detected by the detecting means.

[0014]

According to the character / graphic editing apparatus of the present invention,
Since the coordinate value display means displays the coordinate value of the control point closest to the position designated by the designating means, the user can specify the position in the vicinity of the desired control point to accurately determine the control point. Since it is possible to know the coordinate values, it is possible to make subtle edits to the shapes of characters and figures.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a functional block diagram showing an embodiment of a character / graphic editing apparatus according to the present invention.

In the figure, the character / graphic editing apparatus comprises an instruction means 10, a display section 20, a storage section 30, a control section 40, a detection means 50, and a coordinate display means 60.

The instructing means 10 is a pointing device, for example, a mouse, and gives an editing command for instructing a desired position on the display screen of the display unit 30 and for editing the characters / graphics displayed on the display unit 20. .. Designation of a desired position is performed by a cursor that is moved by operating the instruction means 10. The cursor is actually set to interlock with the movement of the mouse.

The display unit 20 is a bitmap type display, and displays characters / graphics, a cursor, and display information in a multi-window format.

The storage unit 30 has a shape data coordinate system outline storage area 31 and a shape data coordinate system cursor position storage area 32 which are composed of a main memory, and a display coordinate system storage area 33 which is composed of a frame memory. And
The shape data coordinate system outline storage area 31 stores outline data loaded from a disc (not shown) or newly created outline data. That is, the closed curve data including the coordinate value of the control point and the attribute is stored as the outline data. The shape data coordinate system cursor position storage area 32 stores position information (coordinates) of the cursor in the shape data coordinate system. The display coordinate system storage area 33 stores the outline data converted into the display coordinate system for displaying in the coordinate system of the display unit 20, and cursor data indicating the shape and position of the cursor in the display coordinate system. ..

The control unit 40 is composed of a processor and a central processing unit, and displays characters / graphics and a cursor on the display unit 20 based on the data stored in the display coordinate system storage area 33. Further, the coordinate value in the display coordinate system of the cursor is converted into the coordinate value in the shape data coordinate system (for example, the coordinate system of 1000 × 1000 dots) and stored in the shape data coordinate system cursor position storage area 32. Further, when an editing command is given by the instructing means 10, the control unit 40 notifies the detecting means 50 of that fact.

The detecting means 50 refers to the data stored in the shape data coordinate system storage area 31 on the basis of the editing command to construct each contour displayed on the display screen of the display section 20. Among the control points, the control point closest to the position designated by the designating means 10 is detected, and the coordinate value display means 60 for displaying the coordinate value of the detected control point is displayed. The coordinate value display means 60 includes the display unit 20.
Is a window displayed on the display screen of. This window may be displayed at the time of displaying the coordinate value of the control point detected by the detection means 50, or may be displayed in a display area provided in advance on the display screen.

The detecting means 50 may be realized by hardware such as a processor or a central processing unit, or by executing software (program) for executing the function of the detecting means 50 by the hardware. You may do it.

The schematic operation of the character / figure editing apparatus having the above-mentioned structure will be described with reference to the flow chart shown in FIG.

The control unit 40 reads the cursor position (coordinate value) in the display coordinate system of the cursor of the pointing device from the display coordinate system storage area 33 (step 201), and at the same time, the coordinate value of the cursor position is stored in the shape data. It is converted into a coordinate system (step 202) and stored in the shape data coordinate system cursor position storage area 32. Next, the detection means 50
Reads the control point of the shape data from the shape data coordinate system outline storage area 31 and the coordinate value of the cursor position from the shape data coordinate system cursor position storage area 32 (step 203), and moves the cursor position for all control points. And the position of the control point are calculated, and it is checked whether or not the difference is less than or equal to a preset threshold value (step 20).
4). Here, the control point whose difference is less than or equal to the threshold value is recognized as the control point closest to the cursor. When step 204 is completed, the detection means 50 determines whether or not there is a control point closest to the cursor (step 205), and if it exists, the coordinate value of the corresponding control point is displayed on the coordinate value display means 60. It is displayed (step 206), while if it does not exist, the process is terminated.

Next, the editing processing operation of this embodiment will be described with reference to FIGS. 3 to 6 and FIG. 1 described above.

Incidentally, FIG. 3 shows a flow chart showing the editing processing operation, FIG. 4 shows an example of character shape editing, and FIGS. 5 and 6 show data created in the processing process.

Here, a closed curve 1 composed of control point 0, control point 1, control point 2 and control point 3 as shown in FIG.
An editing process for editing a character shape consisting of a closed curve 2 composed of control points 4, 5, 5, 6, and 7 will be described. In FIG. 5, the symbols “□” and “◯” are control points, especially the symbol “□” is the control point of the starting point, and the symbol “+” is the cursor. The traveling direction of the closed curve 1 is counterclockwise, and the traveling direction of the closed curve 2 is clockwise.

As shown in FIG. 3, the control unit 40 reads the coordinate value of the cursor position in the display coordinate system of the cursor from the display coordinate system storage area 32 (step 301),
The coordinate value of the cursor position is converted into the coordinate system of the shape data (step 302) and stored in the shape data coordinate system cursor position storage area 32. At this time, each control point obtained from the shape data coordinate system outline storage area 31 and the coordinates of the cursor position obtained from the shape data coordinate system cursor position storage area 32 are represented as coordinate value data 500 shown in FIG.

The detecting means 50 reads the coordinate values of the control points of the shape data from the shape data coordinate system outline storage area 31 (step 203) and creates the candidate list 600 in the format as shown in FIG. 6 (step 304). ).
Each list of the candidate list 600 is composed of items of control point order and distance squared. Actual data has not been written at this point. Although the number of lists is six here, any number may be used.

Next, the detecting means 50 judges whether or not all the control points have been checked (step 305), and if there is an unchecked one, the coordinate values of the unchecked control point and cursor position. Based on the above, the square of the distance between the control point and the cursor position is calculated (step 306), and based on the calculation result, it is determined whether or not the value of the square of the distance is less than or equal to a preset threshold value. (Step 307). Here, the threshold is set to "2" in the shape data coordinate system. If the value of the square of the distance is larger than the threshold value in step 307, the process returns to step 305 to execute this step and subsequent steps. Write to (Step 3
08).

Next, the detecting means 50 judges whether or not the candidate list 600 is full, that is, whether or not data has been written in all the lists (step 309), and if there is an empty list, the above step 305 is executed. Return Perform this step and subsequent steps. If it is determined in this step 305 that all control points have been checked, then all candidate lists are free (whether the square value of the distance between the cursor position and the control point is less than or equal to a threshold value). (Step 3
10). Here, if there is data in two or more lists, the control point with the smallest value of the square of the distance is obtained. If there are two or more control points with the smallest value of the square of the distance, the control point with the smallest order is selected (step 31).
1). Subsequently, the coordinate value of the selected control point in the shape data coordinate system is displayed on the coordinate value display means 60 (step 312), and the control point is highlighted (step 31).
3).

If the candidates are full in step 309,
The detection means 50 proceeds to step 311. In other words, when the candidate list 600 is full, the process proceeds to step 311 without calculating the square of the distance between the cursor and the control point.

Explaining this with a concrete example, when the calculation of the square of the distance between the control point and the cursor is executed based on the contents of the coordinate value data 500 shown in FIG. At the control point 7, the square of the distance between the coordinate value (4, 4) of the control point 7 and the coordinate value (3, 3) of the cursor position is calculated (square of (4-3) + (4-3) ) Squared value is
It becomes "2". Since this is less than or equal to the threshold value (value 2), only the data of the control point 7 will be written in the candidate list 600. Therefore, in this example, since the evaluation in step 309 is "NO", the process proceeds to step 305, and the evaluation in step 305 is "YES", so the process proceeds to step 310, and the evaluation in step 310 is "NO".
Therefore, step 311 and the subsequent steps are executed, whereby the coordinate values of the control point 7 in the order 7 are displayed, and the screen display of the control point 7 is reversed. This allows the user to know the coordinate value of the highlighted control point.

Next, application examples of this embodiment will be listed. (1) The user can also specify the threshold value. (2) The threshold value can be specified by the display coordinate system. In this case, the threshold value expressed in the display coordinate system is converted into the shape data coordinate system, and the coordinate value is compared with the calculation result of the square of the distance between the cursor position and the control point. Become. (3) The number of candidate lists is not limited to six. (4) If the candidate list is empty, a message "No corresponding control point" is displayed. (5) When the square value of the distance is the same and there are two or more minimum control points, information on those control points is sequentially displayed according to the user's operation. (6) In addition to reversing the screen display of the control points, the color of the control points can be changed and the control points can be surrounded by a small rectangle. (7) It is also possible to select the segment closest to the cursor and display the minimum or maximum value of the x coordinate or the y coordinate, or the coordinate of the end point. In this case, a vertical line is drawn from the cursor position to each segment, and the segment having the shortest vertical line length is selected. If there are a plurality of segments with the same vertical length and the shortest length, information about these segments is sequentially displayed according to the user's operation. (8) Select the closed curve closest to the cursor and select x coordinate or y
It is also possible to display the minimum value or the maximum value of the coordinates, or the coordinates of the starting point of the closed curve. In this case, (7) above
Select the closed curve containing the segment obtained by the method described in.

As described above, according to this embodiment, since the coordinate value of the shape data of the control point closest to the cursor is displayed as a numerical value, it is possible to edit the shape with high accuracy. Moreover, since the coordinate values of the control points are displayed, it is possible to easily check the shape data.

[0037]

As described above, according to the present invention, the coordinate value display means displays the coordinate value of the control point closest to the position designated by the designating means. By specifying the position in the vicinity of, the precise coordinate value of the control point can be known. Therefore, it is possible to delicately edit the shapes of characters and figures.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of a character / graphic editing apparatus according to the present invention.

FIG. 2 is a flowchart showing a schematic operation of this embodiment.

FIG. 3 is a flowchart showing a detailed edit processing operation of the apparatus of the embodiment shown in FIG.

FIG. 4 is a diagram showing an example of character shape editing used in this embodiment.

FIG. 5 is a diagram showing an example of coordinate value data of control points and a cursor in the shape data coordinate system in the present embodiment.

FIG. 6 is a diagram showing an example of a candidate list according to the present embodiment.

[Explanation of symbols]

 10 ... Instructing means, 20 ... Display unit, 30 ... Storage unit, 31 ... Shape data coordinate system outline storage region, 32 ... Shape data coordinate system cursor position storage region, 33 ... Display coordinate system storage region, 40 ... Control unit, 50 Detecting means, 60 Coordinate value displaying means.

Claims (1)

[Claims] 1. A character / graphics editing apparatus for displaying outlines of characters / graphics, etc. corresponding to outline data on a display screen, instructing means for designating a desired position on the display screen, and displaying on the display screen. Detection means for detecting the control point closest to the position designated by the designating means, out of the respective control points constituting the contour, and the coordinate value for displaying the coordinate value of the control point detected by the detection means. A character / graphics editing device characterized by comprising display means.