JPH0642251B2 - Dimension line display method - Google Patents

Description

The present invention relates to a dimension line display system, and more particularly to a dimension line display system in a graphic processing display system.

[Conventional technology]

In displaying a drawing composed of dots, straight lines, circles, etc., it may be necessary to display a dimension line as shown in FIG.

The dimension line shown in FIG. 2 is composed of three elements, which are elements p and r which are dimension extension lines and q which is a dimension line in a narrow sense (the number of elements of the dimension line is not limited to three). The dimension line shown in FIG. 3 is composed of five elements), and indicates the length “100” of the long side of the rectangle.

Conventionally, in the dimension line display method for displaying this type of dimension line in a graphic processing display system, the input dimension line data is on the orthogonal coordinates (xy coordinates) of the start point and the end point of the elements forming the dimension line. Data in a storage format composed of a set of coordinate values (x, y) are arranged by the coordinate storage conversion device and stored in the storage device, and the storage format data is converted into the display format data by the coordinate display conversion device. The dimension line was displayed on the output device based on the display format data.

Referring to FIG. 3, when the dimension line data is stored in the storage device in the conventional dimension line display method, the data of the storage format (parallel movement of the dimension line, movement of positions of some elements, etc. is performed). If all the elements 31 to 35 are coordinate values (x _1s , y _1s ) and (x _1e , y _1e ) to (x _5s , of all elements 31 to 35, the processing is performed based on the data in the storage format. y
_5s ) and (x _5e , y _5e ).

Such a dimension line is translated in the direction of vector B in the figure (starting points (x _1s , elements 31 to 33, which are dimension extension lines,
In the case where the positions of (y _1s ) to (x _3s , y _3s ) are not changed), the measures are taken by changing the coordinate values of the elements 31 to 35.

[Problems to be solved by the invention]

In the above-mentioned conventional dimension line display method, since the dimension line storage format data is composed of the coordinate values of all elements, dimension lines such as parallel movement of the dimension lines and movement of the positions of some elements, etc. Has the drawback that most of the coordinate values that make up the data in storage format have to be recreated and the dimension lines must be displayed when changes are made (a lot of data is It has the disadvantage of having to be changed).

For example, in the dimension line shown in FIG. 3, the coordinate values of the end points of the elements 31, 32 and 33 and the coordinate values of the start points and the end points of the elements 34B and 35 along with the parallel movement in the direction of the vector B in the figure. There is a drawback in that most of the values, that is, the data in the storage format of the dimension lines shown, must be recreated.

In view of the above points, an object of the present invention is to easily cope with a change in the display of the dimension line such as a parallel movement of the dimension line or a movement of positions of some elements constituting the dimension line with a slight change in data. It is an object of the present invention to provide a dimension line display method capable of displaying changed dimension lines on an output device.

[Means for solving problems]

The dimension line display method of the present invention is an input device for inputting dimension line data, and storage data in a storage format in which the dimension line data input by this input device is indicated by a unit direction vector component and a distance component. And a vector distance storage conversion device that copes with a change in the display of the dimension line by changing the storage data, a storage device that stores the storage data generated by the vector distance storage conversion device, and the storage device. And a vector distance display conversion device for converting the storage data stored in the display data into display data in a display format indicated by the coordinate values of rectangular coordinates, and a dimension line based on the display data generated by the vector distance display conversion device. And an output device for displaying.

[Action]

In the dimension line display system of the present invention, the input device inputs the dimension line data, and the vector distance memory conversion device stores the dimension line data input by the input device by the unit direction vector component and the distance component. The storage device stores the storage data generated by the vector distance storage conversion device by converting the storage data to the storage data of the format and dealing with the change of the display of the dimension line by changing the storage data. Converts the storage data stored in the storage device into display data in a display format indicated by rectangular coordinate values,
The output device displays the dimension line based on the display data generated by the vector distance display conversion device.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the dimension line display system of the present invention. The display method of the dimension line of this embodiment is the keyboard 1 and the tablet 2 which are input devices.
And a pen 3, a vector distance storage conversion device 4, a vector distance display conversion device 5, a disk device 6 as a storage device, and a graphic display device 7 as an output device.

The keyboard 1 inputs operation commands such as starting, stopping, and abnormal processing of the graphic processing display system to which the dimension line display system of the present embodiment is applied, and inputting coordinate values of dimension line data.

The tablet 2 and the pen 3 are changed by moving the pen 3 to a specific position on the tablet 2 to instruct the position of creating (displaying) the dimension line by inputting or changing the position of the dimension line already created. Instructions for specifying the target dimension line and instructions for changing and moving positions are given.

In the following description, the keyboard 1, the tablet 2 and the pen 3 will be collectively described as an input device.

The vector distance storage conversion device 4 converts the data of the dimension line input from the input device into storage data composed of a unit direction vector component and a distance component.

The coordinate value of the start point (x _s , y _s ) and the coordinate value of the end point (x _e , y)
The data of each element (narrowly defined dimension line and dimension extension line) constituting the dimension line input from the input device as a pair with _e ) is a unit direction vector by the vector distance storage conversion device 4 based on the following processing procedure. It is converted into storage data composed of a component and a distance component.

 The distance L of the line segment of each element is obtained from the following equation.

L = (x _e −x _s ) ² + (y _e −y _s ) ^{2 A} unit direction vector component a is obtained from the following equation.

a = _- obtaining by the following formula (y e _-y s) / L unit vector component b.

b = (x _e −x _s ) / L The distance component c is obtained from the following equation.

obtaining by the following formula _{c = x s × a + y} s × b distance component d.

obtaining by the following formula _{d = x s × b-y} s × a distance component e.

e = x _e xby y _e xa Storage format data (dimensions) of each element forming a dimension line composed of the unit direction vector components a and b and the distance components c, d and e thus generated. Data for storing lines) is stored in the disk device 6.

The vector distance display conversion device 5 converts the dimension line storage data (unit direction vector component and distance component of each element) stored in the disk device 6 into dimension line display data.

The dimension line storage data stored in the disk device 6 is converted into display data composed of coordinate values by the vector distance display conversion device 5 based on the following processing procedure.

The x coordinate x _{s of the} starting point is calculated by the following equation.

x _s = c × a + d × b The y coordinate y _{s of the} starting point is obtained from the following equation.

y _s = c × b−d × a The x coordinate x _{e of the} end point is obtained from the following equation.

x _e = c × a + e × b The y coordinate y _{e of the} end point is obtained from the following equation.

y _e = c × b−e × a Coordinate value (x _s , y _s ) of the starting point generated in this way
And the coordinate value (x _e , y _e ) of the end point, the dimension line is displayed on the graphic display device 7 based on the display data of the dimension line indicating each element.

The disk device 6 stores the storage data of the dimension line generated by the vector distance storage conversion device 4.

The graphic display device 7 displays the dimension line based on the display data based on the data for storing the dimension line stored in the disk device 6.

Next, the operation of the dimension line display system of the present embodiment configured as described above will be described. Here, Fig. 4 (a)
And the dimension line shown in (b) (The dimension line shown in Fig. 4 (a) is an element
The operation will be described when the display of (11, 12, 13, 14 and 15 and the dimension line shown in FIG. 4 (b) is composed of elements 21, 22, 23, 24 and 25) is displayed.

When the dimension line shown in FIG. 4 (a) is displayed, the data of the dimension line input from the input device is converted into storage data by the vector distance storage conversion device 4 for each of the elements 11 to 15 and the disk is stored. Stored in device 6.

For example, the data regarding the element 11 is held in the disk device 6 by being indicated by two unit direction vector components a ₁ and b ₁ and three distance components c ₁ , d ₁ and e ₁ .

At this time, the unit direction vector components a ₁ and b of the element 11
₁ and the distance components c ₁ , d ₁ and e ₁ and the coordinate values (x _s1 , y _s1 ) and (x _e1 , y _e1 ) of the start and end points of the input data (data in the storage format in the conventional dimension line display system) But see there. Figure 3. the third and x _s1, etc. described herein and x _s1, etc. shown in FIG does not indicate the same value) and relationship is as follows.

X-coordinate of the starting point x _s1 = c ₁ × a ₁ + d ₁ × b ₁ y-coordinate of the starting point y _s1 = c ₁ × b ₁ −d ₁ × a ₁ x-coordinate of the ending point x _{e 1} = c ₁ × a ₁ + e ₁ × b ₁ y coordinate of end point y _e1 = c ₁ × b ₁ −e ₁ × a ₁ where the unit direction vector components a ₁ and b ₁ are the reference points of the element 11 (straight line and dimension passing through the origin of the xy coordinates). A unit vector that defines the direction of a point that is orthogonal to the straight line including the line segment of the line element is specified, the distance between the origin and the reference point is specified by the distance component c ₁ , and the reference by the distance component d _1. The distance between the point and the start point is specified, and the distance component e ₁ specifies the distance between the reference point and the end point.

In this way, the storage data held in the disk device 6 is converted by the vector distance display conversion device 5 into display data composed of coordinate values of Cartesian coordinates that match the graphic display device 7, and converted into this display data. Based on this, the dimension line shown in FIG. 4 (a) is displayed on the graphic display device 7.

Next, the operation of changing the display of the dimension line displayed in this way as shown in FIG. 4 (b) will be described. This change is performed by changing the positions of the elements 14 and 15 which are the narrowly defined dimension lines shown by the broken line in FIG.
It is translated in the direction of (movement distance α) to correct the positions of the elements 24 and 25.

In this case, input data indicating the change of the dimension line (specification of the dimension line to be changed and the content of the change given by the coordinate value, moving distance, etc.) is input from the input device.

The vector distance storage conversion device 4 stores it in the disk device 6 based on this input data (when the input data is a coordinate value, coordinate conversion to a value corresponding to the unit direction vector component and the distance component is performed). The storage data of the dimension line shown in FIG. 4 (a) is changed.

That is, for the elements 21, 22 and 23 which are the dimension extension lines, the moving distance α is added to the distance components e ₁ , e ₂ and e ₃ of the elements 11, 12 and 13 as shown in the following equation to obtain the distance component e. ₁ ′, e ₂ ′ and e ₃ ′ are obtained (which can be dealt with only by this addition processing).

e ₁ ′ = e ₁ + α e ₂ ′ = e ₂ + α e ₃ ′ = e ₃ + α Further, regarding the elements 24 and 25, which are dimension lines in a narrow sense,
Moving distances α to distance components c ₄ and c ₅ of elements 14 and 15
Are added as shown in the following equation to obtain distance components c ₄ ′ and c
_{5 'is} obtained (the addition processing only cope with).

c ₄ ′ = c ₄ + α c ₅ ′ = c ₅ + α The storage data thus changed is stored in the disk device 6.

In the vector distance display conversion device 5, the changed storage data held in the disk device 6 is converted into display data consisting of coordinate values of Cartesian coordinates that fit the graphic display device 7, and based on this display data The dimension line shown in FIG. 4 (b) is displayed on the graphic display device 7.

〔The invention's effect〕

As described above, according to the present invention, by providing the vector distance storage conversion device and the vector distance display conversion device, the display of the dimension line such as the parallel movement of the dimension line or the movement of the positions of some elements constituting the dimension line is displayed. There is an effect that the changed dimension line can be displayed on the output device by easily dealing with the slight change of the storage data.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a diagram showing an example of dimension lines, and FIG. 3 is a storage device in a conventional dimension line display system. FIG. 4 is a diagram showing an example of the format of the dimension line data stored in FIG. 4, and FIGS. 4 (a) and 4 (b) are diagrams for explaining the operation of the dimension line display system shown in FIG. In the figure, 1 ... keyboard, 2 ... tablet 3 ... pen, 4 ... vector distance storage conversion device, 5 ... vector distance display conversion device, 6 ... disk device, 7 ... graphic display device.

Claims (1)

[Claims] 1. An input device for inputting data of a dimension line, and data of the dimension line input by the input device is converted into storage data of a storage format indicated by a unit direction vector component and a distance component. A vector distance storage conversion device that copes with a change in the display data by changing the display data, a storage device that stores the storage data generated by the vector distance storage conversion device, and a storage device that stores the storage data. A vector distance display conversion device for converting storage data into display data in a display format indicated by rectangular coordinate values, and an output device for displaying a dimension line based on the display data generated by the vector distance display conversion device. And a display method of the dimension line.