JP3433475B2 - Figure creation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic creating apparatus for creating a graphic in a computer information processing apparatus, and more particularly to an input method for creating a continuous line. . 2. Description of the Related Art Conventionally, software for drawing figures with a personal computer has been known. Also,
It is also known that such a graphic creation device is provided as one of the functions of a word processor. [0003] This type of figure creating apparatus is used for a circle, a square,
You can freely draw figures by combining straight lines and curves. [0004] However, in the conventional graphic forming apparatus, input processing of a continuous line differs depending on the type of the continuous line. More specifically, it is necessary to declare the type of the continuous line in advance when the continuous line is an open curve and when the continuous line is a closed curve, and to input separately for each process. Accordingly, the procedure for inputting continuous lines is complicated,
Also, once the type of continuous line was declared, the processing could not be changed on the way. An object of the present invention is to eliminate the need to declare the type of a continuous line in advance. According to the present invention, a curve connecting the designated points is drawn by sequentially specifying points on a continuous line to be drawn from a start point to an end point. A graphics creating device, comprising: coordinates of a newly designated point;
Comparing means for comparing the coordinates of the designated point up to that time; and as a result of the comparison by the comparing means, if it is determined that the coordinates of the newly designated point match the coordinates of the starting point, the coincidence is determined. If the result of the comparison by the closed curve drawing means for drawing a closed curve connected at the set point and the comparing means determines that the coordinates of the newly specified point match the coordinates of the point specified immediately before, And an open curve drawing means for drawing an open curve having the coincident point as an end point. An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a block diagram showing the configuration of a business card creating apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a CPU for performing overall control. Reference numeral 12 denotes a keyboard provided with function keys for execution, cursor movement, and other functions.
Reference numeral 4 denotes a mouse as a pointing device. Reference numeral 16 denotes a graphic editing unit for generating and editing graphic data in response to the user's operation of the key input unit 12 and the mouse 14, and 18 stores the graphic data generated by the graphic editing unit 16. This is a figure memory. The graphic data is composed of graphic type data and coordinate data (including vector data), and the graphic memory 18 stores a graphic type storage area 18A and a coordinate storage area 1 for storing these in association with each other.
8B. Reference numeral 20 denotes a display memory for storing the display data displayed on the display unit 22 in a dot pattern, and converts the graphic data stored in the graphic memory 18 into an image and stores it. Next, the operation in such a configuration will be described with reference to the flowchart of FIG. 2 and the display examples of FIGS. 3 (A) to 3 (F). Here, an example of inputting a free line using the mouse 14 will be described. First, as shown in FIG.
When the mouse button is clicked once at an appropriate coordinate position and the start point 24 is input, the figure editing unit 16 stores the start point coordinates (x ₁ , y ₁ ) in the coordinate storage area 18B of the figure memory 18.
And an internal counter n (not shown) is initialized to "1" (step S1). Next, in order to draw a free line, FIG.
As shown by reference numeral 26, a passing point of the free line is input. This is performed by moving the coordinates of a mouse cursor (not shown), pressing the mouse button (not shown) once, and immediately releasing it (this button operation is referred to as clicking). That is, when the mouse button is pressed, the graphic editing unit 16 counts up the counter n (step S2), and then detects whether the mode is the coordinate search mode, that is, whether the mouse button is immediately released. (Step S3). When not in search mode, the coordinate position as the passing point (x _n, y _n), and the added retained in the coordinate memory area 18 (step S4). Therefore, the coordinates (x _n, y _n) is not equal to the starting point held in the coordinate storage area _{18 (x 1, y 1)} ( step S5), and also the coordinates before _{(x n-1, y n} -1 ) (Step S6), the flow returns to step S2, and the next coordinate input is accepted. By repeating the above, FIG.
As shown by reference numerals 28, 30, and 32, the passing points of the free lines are sequentially inputted, and their coordinates are additionally stored in the coordinate storage area 18B of the graphic memory 18. When inputting an open curve, the last point is input by clicking the mouse button twice at the same coordinates (for example, at point 34 shown in FIG. 3C). Is done. That is, the second click, at step S6, the coordinates (x _n, y _n) is determined to be equal to the coordinates before _{(x n-1, y n} -1) according to first click. In this case, the point 34 becomes the final point, and the graphic type data indicating the open curve is stored in the graphic type storage area 18A of the graphic memory 18, and as shown in FIG. , Each point 26, 28, 3 from the starting point 24
An open curve 36 connecting the final point 34 via 0 and 32 is drawn (step S7). On the other hand, when a closed curve is input, a search area for searching for a starting point is input. As a method for inputting the search area, for example, as shown in FIG. 3 (E), a mouse button is pressed to input an area start point 38, and the mouse is moved to the area end point 40 while keeping the button pressed.
Move the cursor and release the mouse button to enter the region end point 40. And this area start point 3
The search area 42 is a rectangle having a diagonal line of 8 and the area end point 40.
And That is, if the mouse button is not released immediately after the mouse button is pressed, the graphic editing unit 16 determines that the coordinate search mode is set in step S3, and the search area 42 is determined. that of the waiting, searching for the starting point 24 of the free lines of the search area 42, the coordinate storage area 18B coordinates of the searched point as (x _n, y _n)
(Step S8). Thus coordinates held in the coordinate storage area 18B (x _n, y _n) is the starting point 24
Since it is equal to (x ₁ , y ₁ ), it is determined that it is equal in step S5. In this case, the starting point 24 is the final point, the figure type data indicating the closed curve is stored in the figure type storage area 18A of the figure memory 18, and the display unit 22 displays the starting point as shown in FIG. 2 points from 24
A closed curve 44 returning to the starting point 24 via 6, 28, 30, 32
Is subtracted (step S9). If the start point cannot be found in the designated search area 42 in the search processing in step S8, the area start point 38 is set to (x _n , y _n ). As described above, at the time of inputting the final point at the time of inputting a continuous line, the graphic search function is used to determine whether the continuous line is a closed curve or an open curve, that is, the end point of the continuous line. At the time of input, whether to search for the input start point or whether to perform closed curve processing or open curve processing is determined, so there is no need to declare the type of continuous line in advance,
It saves the trouble of inputting. Further, the type of the continuous line can be changed in the middle. In the above embodiment, each point is designated by using the mouse 14, but it is also possible to use a cursor key of the key input unit 12 or the like. According to the present invention, since an open curve and a closed curve can be automatically determined at the time of inputting an end point and a continuous line can be input, there is no need to declare the type of the continuous line in advance, and the input time is reduced. Can be omitted, and the operability in performing the input operation can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a graphic creating apparatus according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of one embodiment. FIGS. 3A to 3F are diagrams each showing a display example for explaining the operation of one embodiment. [Description of Signs] 10 CPU, 12 key input unit, 14 mouse, 16
... Figure editing unit, 18... Figure memory, 18A... Figure type storage area, 18B.
... Display unit.

Continuation of the front page (56) References JP-A-9-326038 (JP, A) JP-A-63-129480 (JP, A) UNIX as a tool, Science Inc., April 25, 1993, 1st edition, p. 150-153 OS IV GDP / EX Instructions (Drawing and Output Program) V10L10 Series First Edition, Fujitsu Limited, June 30, 1990, First Edition, p. 75-77 (58) Field surveyed (Int. Cl. ⁷ , DB name) G06T 11/80 G06T 11/20 G06F 3/00 G06F 3/153 CSDB (Japan Patent Office)

Claims (1)

(57) [Claims] [Claim 1] Creating a figure that draws a curve connecting the specified points by sequentially specifying points on a continuous line to be drawn from a start point to an end point An apparatus, comprising: comparing means for comparing the coordinates of a newly designated point with the coordinates of a point designated so far; as a result of the comparison by the comparing means, the coordinates of the newly designated point are: If it is determined that they match the coordinates of the starting point,
A closed curve drawing unit that draws a closed curve connected at the coincident point; and a result of the comparison by the comparing unit, where it is determined that the coordinates of the newly specified point match the coordinates of the point specified immediately before. And an open curve drawing means for drawing an open curve having the coincident point as an end point.