JPH04372067A - Drawing system for cad system - Google Patents

Abstract

PURPOSE:To simply perform a drawing operation and an attribute input in the drawing CAD system performing a screen operation using an input means. CONSTITUTION:A menu guidance 3 including a basic display shape corresponding to the name of the model for drawing and the name of the model is displayed on a screen 1. Models 4 to 7 selected by the input means from this menu guidance are drawn on the screen 1 according to the phase relation (starting point/ elapsed point/end point) specified using the input means. An attribute input form 8 for the models 4 to 7 is displayed on the screen 1, and the attribute information is supplied to the models 4 to 7 by the input operation to this attribute input form 8.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drafting method for a CAD (computer-aided design) system, and particularly to the drawing of geometric shapes used in general drafting and the description of their attributes.

0002

[Prior Art] In conventional drafting CAD, drawings are
Based on the recognition that each vector is composed of a single vector, two methods have been used for drawing: one is to input data one by one, and the other is to draw a basic diagram (including symbols) that has been drawn and registered in advance as a pattern.

[0003]Additionally, attribute information is attached to a drawn figure in a manner that corresponds to each vector constituting the figure, or groups a plurality of these vectors to a meaningful level and attaches them to their representative vectors. I was taking it.

[0004] Dialogue operations for drawing in conventional CAD and their effects will be explained below. (1) Select the type of vector to be drawn (straight line, circle, etc.) and creation method (horizontal, vertical, etc.) using menu guidance or command input. (2) Next, a predetermined vector is drawn on the screen by sequentially inputting the coordinates of the vector to be drawn. (3) When repeating the operations in (1) and (2) above, and for stylized partial diagrams and symbol diagrams, register them as basic patterns in advance, and call these basic diagrams as necessary. Complete the drawing by completing the drawing. (4) Attribute information such as dimensions and notes for each geometrical shape in the drawing drawn in this manner is assigned in association with the representative vector of each shape to complete the drawing.

[0005]

[Problem to be Solved by the Invention] However, since conventional drafting CAD was constructed based on the recognition that "a drawing is a collection of vector elements," it was necessary to input vectors one by one in an interactive manner. As a result, there was a problem in that input operations became extremely complicated. In addition, although it was possible to reuse basic patterns that had been registered in advance, there were many restrictions on usage because only those with fixed shapes could be used, and there was no concept of objects or models. Therefore, meanings such as attributes can only be assigned to the representative vector correspondence of each shape, which poses the problem that attribute management is difficult.

The present invention has been made to solve the above-mentioned problems, and is aimed at facilitating drafting operations and attribute input.

[0007]

[Means for Solving the Problems] A drafting method of a CAD system according to the present invention is a drafting method of a CAD system in which screen operations are performed using an input means, and includes the name of a model to be drawn and the name of the model. Displays menu guidance on the screen that includes the basic display shape corresponding to An attribute input section for a model is displayed on the screen, and attribute information is given to the model by inputting to this attribute input section.

[0008]

[Operation] The drafting CAD operation in this invention is, for example, as follows. (1) The name of the model to be drawn and the basic display shape corresponding to the name of the model are defined in advance and registered in the menu guidance. (2) Display menu guidance on the screen and select the model name you want to draw. (3) Hit the phase (starting point, elapsed point, end point) of the model on the screen. (4) The model diagram is automatically displayed in a predetermined shape according to the specified phase relationship. (5) When the figure (model diagram) is displayed, the mode enters the attribute input mode, so when attributes are input, the model diagram and attribute information are managed as a pair. In this way, the present invention directly draws the model shape of the target object to be drawn using the model name and its topology without being aware of the concept of a vector, and it is based on the object-oriented concept of a model. Since it has been introduced, it is possible to easily assign meaning to the model (input attributes), thereby facilitating drafting operations and inputting attributes.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a drafting CAD screen according to the present invention. In the figure, 1 is a CRT screen, 2 is a drafting screen, and 3 is a menu guidance. This menu guidance 3 includes the name of the model you want to draw in advance (in this example, road, railway, ditch, utility pole) and its name. A basic display shape corresponding to the model name is defined. In addition, 4, 5, 6, and 7 on the drawing screen 2 are modeled roads, railways, ditches, and utility poles, respectively, and 8 is an attribute input form (attribute input section) for inputting attributes for the model. ). The drafting method of the CAD system of this embodiment consists of defining the model name and its basic display shape, registering it in the menu guidance, and FIGS. 2 and 3 described later.
This is realized by programming the flowchart.

Hereinafter, the drafting CAD operation of the embodiment will be explained based on the flowcharts shown in FIGS. 1, 2, and 3.

(1) Using a pointing device (input means) such as a mouse, select "road" from the menu guidance 3 (step S21 in FIG. 2), and select the starting point (*a1) and ending point ( *If you hit a2),
A road model 4 is drawn (steps S22 to S25).
). After that, the attribute input form 8 for the model 4
is displayed (step S26), and the attribute information is added to the road model 4 by inputting the attribute information (step S27). Then, in step S29, it is determined whether modeling is complete, and if it is not completed, the process returns to step S21.

(2) Next, select "Railway" from menu guidance 3 (step S21) and hit the start point (*b1) and end point (*b2) on the drawing screen 2, and a railway model 5 will be drawn. (Steps S22 to S25)
. Thereafter, the attribute input form 8 for the model 5 is displayed (step S26), and the attribute information is assigned to the road model 5 by inputting the attribute information (step S27).

(3) Similarly, select "groove" from menu guidance 3 (step S21), and select the starting point (*c1), elapsed point (*c2, *c3, *c4, *c) on the drafting screen 2.
5) and the end point (*c6), groove model 6
is drawn (steps S22 to S25). Thereafter, the attribute input form 8 for the model 6 is displayed (step S26), and by inputting attribute information (step S27), attributes are assigned to the groove model 6.

(4) Furthermore, from Menu Guidance 3, “
When the user selects "Electric Pole" (step S21) and hits only the starting point (*d1) on the drawing screen 2, a model 7 of the utility pole is drawn (steps S22 to S25). After that, the attribute input form 8 for the model 7 will be displayed (
Attributes are given to the utility pole model 7 by inputting attribute information (step S26) (step S27).

On the other hand, in this embodiment, what has already been modeled can be extended as shown in FIG. 4 based on the flowchart of FIG. That is, (5) select "Extend" from menu guidance 3 (step 31 in FIG. 3). In this case, the railway that has already been modeled (*
Assume that b1 to *b2) are further extended. By clicking on an arbitrary point on the already modeled railway (*b1 to *b2), the extension target model (=railway) is specified (step S32). Next, the extension end point (*b2
), then click the elapsed point (*b3) and the final point (*
b4), as shown in Figure 4, (*
b1, *b2, *b3, *b4) is modeled as a new railway model 5 (step S3
3-S36).

[0016]

[Effects of the Invention] As described above, according to the present invention, a model shape to be drawn can be directly drawn without being aware of the concept of a vector, and meaning can be easily assigned to the model. This has the effect of facilitating drafting operations and attribute input.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a drafting CAD screen according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating modeling according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating model extension according to one embodiment of the present invention.

FIG. 4 is a diagram showing a drafting CAD screen on which model extension has been performed.

[Explanation of symbols]

1 CRT screen 2 Drafting screen 3 Menu guidance 4 Road model 5 Railway model 6 Groove model 7 Telephone pole model

Claims (1)

[Claims] [Claim 1] CA that performs screen operations using input means
D system is a drafting method in which menu guidance including the name of the model to be drawn and the basic display shape corresponding to the name of the model is displayed on the screen, and a selection is made from this menu guidance using an input means. The model is drawn on the screen according to the topological relationship specified using the input means, and an attribute input section for the model is displayed on the screen, and attribute information is input to the model by inputting to this attribute input section. A drafting method for a CAD system characterized in that a drawing method is provided.