JP2836073B2 - Graphic processing unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic processing apparatus that performs a drawing process on a predetermined graphic.

2. Description of the Related Art In a conventional graphic processing apparatus, the type of drawing processing (enlargement / reduction, expansion, etc.), a guide point to be drawn in a predetermined figure, a destination of the guide point, and the like are designated by a pointing device such as a mouse. By specifying each element of, the drawing processing corresponding to the type of the specified desired drawing processing (enlargement / reduction, expansion, etc.) is executed based on the position of the guide point at the specified destination. ing.

[Problems to be solved by the invention]

By the way, in the above-described conventional graphic processing apparatus, after the operator performs the drawing process on a certain guide point, for example, after executing the enlargement drawing process, the operator performs the enlargement drawing process on another guide point. In order to execute the process, the drawing process of enlargement for the previous guide point is temporarily terminated, and enlargement is newly selected from the type of drawing process (enlargement / reduction, expansion, etc.) and the position of the other guide point is designated. However, there is a disadvantage that the operation for the drawing process becomes complicated and the work efficiency is extremely low.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a graphic processing apparatus which solves the above-mentioned drawbacks, can easily perform a drawing process, and can shorten a work time.

[Means and actions for solving the problem]

The present invention relates to a graphic processing apparatus for moving a cursor position displayed on a display unit by an input operation of an input unit to edit a graphic formed by a plurality of control points on the display unit. Start instructing means for instructing, and setting means for setting a guide point and a fixed point at each control point forming the figure based on the cursor position, and moving the position coordinates of the guide point set by the setting means with the cursor Figure generating means for changing to a new position coordinate corresponding to the above, generating a figure after editing by the new position coordinate of the guide point and the fixed point, a pause means for instructing a pause of the editing process, End instruction means for instructing the end of editing processing, wherein the graphic generation means is instructed to start editing by the start instruction means and then instructed to end editing by the end instruction means. During the period up to and including the period during which the pause is instructed by the pause unit, the edited figure is generated, and the setting unit cancels the pause instruction by the pause unit. In such a case, the guidance point and the fixed point are reset when an error occurs.

Therefore, it is possible to easily switch between the editing operation and the control point instruction operation, and to improve the efficiency of the graphic editing process.

〔Example〕

Hereinafter, embodiments of the graphic processing apparatus according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing one embodiment of a graphic processing apparatus according to the present invention. In FIG. 1, a keyboard 11 and a mouse 12 connected to the keyboard 11 are inputting various data and commands. The keyboard 11 has a button (hereinafter, referred to as a “left shift button”) for instructing that the drawing process for the graphic is temporarily stopped, and the mouse 12 has a button corresponding to the left shift button. And a button for instructing termination of the drawing process.

External storage device (hereinafter referred to as “disk device”) 13
Is a program for performing drawing processing according to the basic graphic data registered in advance, the created graphic data, and the attribute of the drawing processing, that is, a program for performing the drawing processing corresponding to each processing element such as the moving processing, the enlargement processing, and the expansion processing. Various programs are stored.

The buffer memory 14 is composed of a RAM, and temporarily stores data, operation results, figures read from the disk device 13, and the like. In the buffer memory 14, data of control points set on the figure (for example, four vertices in the case of a rectangle, four points in the upper, lower, left and right directions in the case of a circle, and two end points in the case of a straight line), The data of the fixed point and the guidance point for expanding or enlarging the figure are also stored. The setting of the fixed point is such that when a predetermined function key for graphic processing is pressed, the control point furthest from the guide point set on the graphic changes and is determined as the fixed point.

The font ROM 15 stores a plurality of types of character fonts.

The CRT drive circuit 16 controls the CRT 17 for display, and converts the character dots read from the font ROM 15 into CRTs.
Displayed on RT17.

A control unit (hereinafter, referred to as a “CPU”) 18 controls each of the above units, and executes a predetermined operation, processing, and the like according to a program corresponding to the input command. In the embodiment, the CPU 18 executes a drawing process such as moving, enlarging, and expanding a predetermined figure.

Next, the operation of the drawing processing of the graphic processing apparatus will be described with reference to the flowchart of FIG. In the embodiment, as shown in FIG. 3, a drawing process for a basic figure, for example, a square figure will be described.

An instruction to perform graphic processing is given by a predetermined operation of the keyboard 11 or the mouse 12 of the operator, and a specific graphic, for example, a rectangular graphic is selected from the basic graphic. As shown, a rectangle 20, a cursor 21, and a pop-up menu 22 are displayed. In the square 20, control points 20a to 20d are set at four corners.

Subsequently, when the operator operates the mouse 12 to move the cursor 21 near the control point of the square 20 to be plotted, and further selects a specific plotting process type from the pop-up menu 22, for example, selects an extension ( Step 10
0), the CPU 18 confirms the control point closest to the position of the cursor 21 as a guide point, and recognizes the control point furthest to the position of the cursor 21 as a fixed point (step 101).
For example, as shown in FIG. 3, when the cursor 21 is at the position A, the control point 20a is a guide point and the control point 20c is a fixed point.

The CPU 18 recognizing the fixed point and the guide point in this way determines whether or not the left shift button of the keyboard 11 has been pressed (step 102). The guide point is moved in accordance with the position of the cursor 21 that is moved by the operation.
(Step 103).

For example, as shown in FIG. 4, when the cursor 21 at the position A of the rectangle 20 is moved to the lower right as shown by the arrow in the figure to the position B, the CPU 18 moves to the position B of the cursor 21. The guide point 20a (control point 20a) is also moved along with the movement of the fixed point 20c according to the moving position of the guide point 20a.
The extension processing of the rectangle 20 is executed with the (control point 20c) as an axis.

The CPU 18 that has executed the extension so-called in this manner determines whether or not a button for instructing to end the drawing processing of the mouse 12 has been pressed (step 104). When the execution of the extension process on the rectangle 20 is completed and it is determined that the button has not been pressed, the process returns to the step 102 to execute the steps after this step, that is, the movement position of the guide point that moves with the movement of the cursor , The expansion processing of the rectangle 20 is executed.

By the way, if the left shift button of the keyboard 11 is depressed in the above step 102, the CPU 13 temporarily suspends the execution of the extension processing for the drawing processing target, and
Return to execute this step and subsequent steps.

For example, as shown in FIG.
Move the cursor 21 near the new control point, for example, to a position C, as indicated by an arrow in the figure, while keeping the left shift button pressed, and further press the left shift button When the cursor is released, the CPU 18
The control point 20d closest to the position C of the cursor 21 is recognized as a guide point, and the control point 20d farthest to the position C of the cursor 21 is recognized.
b is recognized as a fixed point.

In a state where the left shift button of the keyboard 11 is pressed, the drawing processing extension processing for the rectangle 20 is temporarily suspended, and even if the cursor moves, the rectangle 20 is maintained in a state before the left shift button was pressed. You.

Then, as shown in FIG. 5, the operator places the cursor 21 at the position C of the rectangle 20 where the new guidance point 20d is set, as shown by the arrow in FIG. When the CPU 18 moves to the position D, the CPU 18 executes expansion processing of the rectangular graphic 20 around the fixed point 20b in accordance with the movement position of the guide point 20d, in this case, reduction processing.

By the way, in the conventional graphic processing device, after performing the drawing process for the guide point 20a, when performing the drawing process for the guide point 20d different from the guide point 20a, the operator needs to
As shown in FIG. 4, at the time when the expansion processing of the rectangle 20 is completed, a button for instructing that the drawing processing of the mouse 12 is ended is pressed, and the drawing processing of the expansion processing is temporarily ended. By manipulating 12, the cursor 21 was moved to the control point of the rectangle 20 to be newly plotted, and a specific plotting process type was reselected from the pop-up menu 22. In this case, move the cursor 21 to the control point.
Moved near 20d (guide point 20d) and re-selected the extension from the pop-up menu 22.

In the above-described embodiment, the left shift button of the keyboard 12 is pressed when the execution of the extension processing for the drawing processing target is temporarily stopped, but the button corresponding to the left shift button of the mouse 12 is pressed. It is clear that good is also good.

Further, in the present embodiment, the extension processing for a rectangular figure has been described. However, the present invention is not limited to this and can be naturally applied to the drawing processing of any figure.
The present invention can also be applied to drawing processing such as enlargement and movement.

〔The invention's effect〕

As described above, the present invention generates an edited graphic for a period other than the period in which the pause is instructed by the pause unit, and when the pause instruction by the pause unit is released, Since the guide point and the fixed point are configured to be reset, the editing operation and the control point instruction operation can be easily switched, and the efficiency of the graphic editing process can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a graphic processing apparatus according to the present invention, FIG. 2 is a flowchart showing a drawing processing operation of the graphic processing apparatus shown in FIG. 1, and FIG. 3 is a drawing according to the present invention. FIG. 4, FIG. 5, FIG. 6, and FIG. 6 are diagrams illustrating the process of the drawing process. 11 ... keyboard, 12 ... mouse, 13 ... external storage device (disk device), 14 ... buffer memory, 15 ... font ROM, 16 ... CRT drive circuit, 17 ... CRT, 18 ... control unit (CPU), 20… Rectangle (Figure), 20a, 20d… Guided point, 21… Cursor, 22… Pop-up menu.

Claims (1)

(57) [Claims] 1. A graphic processing device for moving a cursor position displayed on a display unit by an input operation of an input unit to edit a graphic formed by a plurality of control points on the display unit. Start instructing means for instructing start; setting means for setting a guide point and a fixed point to each control point forming the figure based on the cursor position; and the cursor indicating the position coordinates of the guide point set by the setting means. Figure generating means for changing the position coordinates to new position coordinates in response to the movement, generating a figure after editing based on the new position coordinates of the guide point and the fixed point, and a pause means for instructing a pause of the editing process; An end instructing unit for instructing the end of the editing process. The graphic generating unit, after the start of the editing is instructed by the start instructing unit, ends the editing by the end instructing unit. During the period until indicated, except for the period during which the pause is instructed by the pause unit, the edited figure is generated, and the setting unit is configured to receive the pause instruction from the temporary setting unit. A graphic processing device for resetting a guide point and a fixed point when released.