JPH0520422A - Information processor - Google Patents

Abstract

PURPOSE:To easily plot a perspective diagram on a computer even if a three- dimensional model is not generated on the computer or information inputted by means of a manual operation is not inputted by means of a scanner. CONSTITUTION:A focus 1 is stored in a position shown by F1 on a virtual plane by selecting the focus 1 in a command menu 6, displaying a focus coordinate input window and inputting a numerical value from a keyboard. An auxiliary line 1 in the command menu 6 is selected, a linear line connecting F1 and a cursor C is displayed and the left key of a mouse 4 is inputted. Thus, an auxiliary line L11 is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus such as a computer having an electronic editing printing apparatus and a graphic display.

[0002]

2. Description of the Related Art Conventionally, in order to draw a perspective view on a computer, a three-dimensional model is created in the computer, and the perspective view is transformed, or a perspective view is created on paper and input by a scanner. I was drawing figures from.

[0003]

However, it is troublesome to create a three-dimensional model, and a computer having a three-dimensional function is not yet general. Also, the method of inputting from the scanner is still created by hand.

Therefore, an object of the present invention is to provide an information processing apparatus that solves the above problems.

[0005]

In order to achieve the above object, the present invention is capable of designating a focus on a virtual plane and moving only within a screen displaying the fixed focus and a part of the virtual plane. It is characterized by further comprising: an auxiliary straight line display means for displaying an auxiliary straight line which rotates around the focal point passing through the cursor and a means for fixing the auxiliary straight line passing through the position of the cursor and the focal point.

[0006]

According to the present invention, a perspective view is drawn by designating an actual line segment using an auxiliary straight line passing through a virtual focus.

It is possible to easily draw a perspective view on a computer without creating a three-dimensional model on the computer or inputting one manually input by a scanner.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows the configuration of an information processing apparatus according to an embodiment of the present invention. Reference numeral 1 denotes a computer main body which performs calculation, storage and input / output processing. A CRT 2 displays a figure window 5 and a command menu 6. 3 is a keyboard for inputting alphanumeric characters and commands. Reference numeral 4 denotes a mouse, which performs various processes by moving a cursor, a figure, or the like or pressing a key.

FIG. 2 is a circuit block diagram of the same apparatus. The computer main body 1 has a CPU 7, a memory 8 having a work area and the like, a video RAM 9 for a CRT 2, and hard disk, keyboard and mouse interfaces 10, 11 and. And a hard disk 13 storing programs for an application, a window system, and an operating system for performing a work described later through the hard disk interface 10.

3 to 7 show a part of the command icons displayed on the command menu 6 displayed on the CRT 2 and the key input state of the mouse 4, and the graphic window 5 and a virtual plane which is not actually displayed. The relationship between the points and line segments of and the figure window displaying a part of them is from A to N
Explained up to.

Next, the process of making a perspective view will be described in the order shown in FIGS. First, in (A), the focus 1 in the command menu 6 is selected, and the coordinate input window of the focus F1 is displayed. Numerical values can be input from the keyboard 3 to determine F1, or if a point within the window can be designated using the left key of the mouse 4, it is input from the keyboard here. For example, the coordinates of the window are centered (0, 0), upper left (-1, 1), upper right (1,
1), lower left (-1, -1), lower right (1, -1), it is convenient because the coordinate position outside the window can be estimated to some extent regardless of the size of the window. is there. Of course, you can also specify the size of the window clearly and specify it in coordinates. The coordinates of the focus F1 are input in either mode. Next, in (B), the auxiliary line 1 in the command menu 6 is selected, and a straight line connecting the focus F1 and the current cursor position C is clipped and displayed in the window 5. By pressing the left key of the mouse 4 at that position, the line segment L11 is fixed.

Then, by releasing the key of the mouse 4, the line clipped in the window 5 of the line segment connecting the focus F1 and the cursor C as shown in (C) follows the movement of the cursor C and is separated from the line segment L11. indicate. Next, in (D), in addition to the auxiliary line L11, auxiliary lines L12, L13, and L14 are designated in the same manner, and then the focus 2 in the command menu 6 is selected, the focus coordinate input window is displayed, and a numerical value is input from the keyboard. input. As a result, another focus is stored at the position indicated by F2 on the virtual plane. Next, at (E), select the auxiliary line 2 in the command menu 6, display the clipped line segment in the window 5 of the line segment connecting F2 and the cursor C, and then press the left key of the mouse 4 The auxiliary line L12 is fixed by. Then release the left key of mouse 4 and move the cursor C apart from L21 as shown in (F).
The line segment clipped in the window 5 connecting the line F and F2 is displayed following the movement of the cursor C. Next, in (G), in addition to the auxiliary line L21, L22, L23, L
After specifying 24 in the same manner, the focus 3 in the command menu 6 is selected and the focus coordinate input window is displayed. Here, by inputting the left key of the mouse 4, it is indicated by the cursor C in the window 5. The stored position is stored as the focus F3. Then, by pressing (H), the auxiliary line 3 in the command menu 6 is selected, the clipped line segment is displayed in the window 5 of the line segment connecting F3 and the cursor C, and then the left key of the mouse 4 is pressed to assist. Fix line L31. Then, the left key of the mouse 4 is released, and the line segment clipped in the line segment window 5 connecting the cursors C and F3 separately from L31 is displayed following the movement of the cursor C as shown in (I). Next, in (J), in addition to the auxiliary line L31, L32, L33, and L34 are similarly designated, and when a straight line in the command menu 6 is selected, only the cursor moves when no mouse key is pressed. Next, in (K) and (L), the cursor C is moved onto the auxiliary line and the left key of the mouse 4 is pressed to fix the auxiliary line as a line segment.
Next, as shown in (M), the left key of the mouse 4 is released to move the cursor C to a required position, and as shown in (N), a line segment is drawn on the auxiliary line in the same manner as described above. A perspective view is created.

As described above, the perspective drawing can be easily created by designating the focus and drawing the auxiliary straight line.

(Other Embodiments) There is also a method of zooming out when the focus is specified outside the window, then specifying it with the mouse key and zooming in again.

[0015]

As described above, according to the present invention,
A perspective view can be easily drawn by designating a focus and drawing an auxiliary straight line.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of the present invention.

FIG. 2 is a circuit block diagram of the device of the present invention.

FIG. 3 is a diagram showing a part of a processing flow in the present invention.

FIG. 4 is a diagram showing another part of the flow of processing in the present invention.

FIG. 5 is a diagram showing yet another portion of the flow of processing in the present invention.

FIG. 6 is a diagram showing still another part of the flow of processing in the present invention.

FIG. 7 is a diagram showing yet another portion of the flow of processing in the present invention.

[Explanation of symbols]

 4 Mouse 5 Window 6 Command menu

Claims (1)

Claim: What is claimed is: 1. A focus means for designating a focus on a virtual plane, the focus passing through the fixed focus and a cursor movable only within a screen displaying a part of the virtual plane. An information processing apparatus comprising: an auxiliary straight line display means for displaying an auxiliary straight line rotating around the center; and a means for fixing the auxiliary straight line passing through the position of the cursor and the focal point.