JP3407205B2 - CAD system for construction - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD system for buildings . 2. Description of the Related Art Conventionally, as shown in FIG. 10, for example, a position of a building member constituting a building is represented by a coordinate position set at a certain position and a coordinate position from the origin (FIG. 10). Global coordinate system, x, y, z). Alternatively, a local coordinate system is set at an arbitrary position and local coordinate values (x ′, y ′, z ′),
(X ″, y ″, z ″) (local coordinate system). In general, the local coordinate system has the position of the origin of the local coordinate system with respect to the global coordinate system and the rotation angle θ of the coordinate system as a positional relationship with the global coordinate system. A building member belongs to either the global coordinate system or the local coordinate system, and its position is represented thereby. However, in such a method, the position is independently defined for each building member, and it is difficult to easily handle the relative positional relationship of each building member. In general, when designating the position of a door attached to a wall in a building member, an expression such as “how far away from the edge of which wall” is used. However, a local coordinate system must be set for each wall in order to express using the above-described conventional specifying method. In the design process, design changes are frequently made.
Its local coordinate system must also move. [0005] However, the conventional method has the following problems. <A> With the conventional method of designating the position of a building member, it is difficult to represent the relative positional relationship between building members. If it is to be expressed, the local coordinate system must be set for all building members, which is very complicated. <B> When a building member is moved, the position of the building member must be converted into a coordinate value. <C> Since the position of the building member is represented by the coordinate value, it is an indirect expression, and it is not possible to directly say that the building member is far from the building member, which is often used in designing. <D> Since a building member can be represented by a coordinate value as a point, the direction (vector) of the building member cannot be easily represented. [0004] It is an object of the present invention to provide a building CAD system in which the positions of components of a building CAD object are represented by an expression structure that is easy to handle. Another object of the present invention is to provide an architectural CAD system capable of expressing the direction of a component. Another object of the present invention is to provide an architectural CAD system having an expression structure in which components can be easily changed and deleted. SUMMARY OF THE INVENTION The present invention relates to a computer
CAD system for building with data and database
In addition, the database specifies the types of building components
Configurations that are stored in the schema storage area and belong to the same type
Each element is stored in the storage area of the kernel, and the
Each of the graphic information is stored in the storage area of the graphic attribute.
The position coordinates of the start and end points of the sex are stored in the point attribute storage area.
The position coordinates of the start point and end point of the point attribute have a planar shape
Three other components, a first object, a second object, and a third pair
Distance from the elephant, and each schema and each kernel
Pointing between storage areas with pointers, each kernel and each figure attribute
Pointers between the storage areas of the
Pointers are used to indicate between attribute storage areas using computer pointers.
The body has access to a database of building components
Type, each component, graphic information of each component, and each component
The position coordinates of the component can be extracted using the pointer
Yes, when the design of a certain component is changed,
Related to the component from the object, the second object and the third object
Find other components and modify point attributes of other components
And a CAD system for building. Embodiments of the present invention will be described below with reference to the drawings. <A> Outline of Embodiment The CAD system 1 has a hardware configuration of an input device 11, a display device 12, a computer main unit 13, and a hard disk 18 storing a database, and an application program unit 14, an input / output control unit 15, Data control unit 16, database handler unit 1
7 and CAD processing using the database (see FIG. 1). By replacing the data control unit 16 in accordance with the use such as for building, the C
An AD system can be constructed. <B> A CAD system for construction will be described as an example of the outline of the data control unit. In the data control unit 16, CAD system member data such as columns, walls, doors, and the like are indicated by a column schema 21, a wall schema 22, a door schema 23, etc. of the schema 2 (see FIG. 2). Individual pillars a, which are constituent elements,
b,... are shown in the pillar kernel 31, which are indicated in the pillar schema 21. The column kernel 31 further indicates the column graphic attributes 41, 42,... In which the graphic information of the individual columns a, b,. Furthermore, the area of the starting point and the ending point of the graphic attribute 41 of the pillar a is
Point attribute 51 indicating the position of pillar a, that is, the position of both ends of pillar a,
52 is indicated. In this way, the positions of both ends (start point and end point) of the pillar a can be specified. The components include building cores, street cores, auxiliary lines, floor levels (FL), and the like. The street core is defined by a plane common to all floors, the auxiliary line is defined by a plane for each floor, and the floor level is defined by a plane representing the height of each floor. In addition, by providing a start point and an end point for specifying a position, a vector can be formed, and the back and front of a surface can be defined. <C> Outline of Point Attribute The position of the starting point of the column a is indicated by the point attribute 51, and includes other components, that is, a first object (eg, X1 core) and a second object (example). : Y1 street core), third object (eg: 1st floor FL (floor level)) and vertical distance (separation distance) from them
Are designated as three-dimensional points (see FIG. 3). In addition,
Another component used for specifying this position has a two-dimensional surface, and the “distance” is defined by the vertical distance from the surface. That is, the position of a certain component is represented by, for example, a planar component such as a wall, a grid, an auxiliary line, or a floor level (FL), and a vertical distance from these components, that is, a separation distance. By expressing in this manner, the position can be expressed by the distance from the building members, etc., in the same way as the designer usually thinks. This makes it possible to easily change or delete components when changing the design. <D> Positional relationship between the pillar and the center line The pillar a is a kernel 31 and a graphic attribute 41 representing its shape.
Is specified, and a point attribute 5
1, 52 are designated. The center point of the lower end of pillar a is X1
325mm away from the core, 325mm from the Y1 core
Away, on the ground floor. Similarly, the upper end is 325 mm away from the X1 core and 3 mm from the Y1 core.
25 mm apart and at the second floor level (see FIG. 3). In this case, the point attribute of the lower end (start point) of the pillar a is the first
The object is the X1 line, the second object is the Y1 line, and the third object is the first floor FL.
5, 0.0. The point attributes representing the position of the upper end (end point) are as follows: the first object is the X1 line, the second object is the Y1 line, the third object is the second floor FL, and the separation distances are 325, 325, and 0, respectively. 0.0. <E> Movement of pillars due to movement of street core In FIG. 4, with the movement of the street X1 (movement from X1 'to X1), the point attribute of the pillar whose position is determined by the street core is This indicates that the pillar also moves in order to keep the distance from the center line constant. When the grid is changed in the architectural design process, all point attributes related to the grid are moved. As shown in FIG. 4, the point attributes positioned relatively from the X1 core can be easily specified and moved. In addition, those processes can be automated. <F> Positional relationship between the wall and the wick The positional relationship between the wall and the wick is such that, as shown in FIG.
The position of the other end of the wall is expressed by three elements of Y1 line, X2 line, and FL (floor level). The start and end points of the wall are Y
It is 1000mm away from the core and X1
Suppose you are in contact with the core in two ways. In this case, the point attribute representing the position of the starting point of the wall is Y1 street core, X1 street core, 1st floor FL
And the respective separation distances of 1000, 0.0, and 0.0. The point attribute of the end point is Y1 way core, X2 way core,
The first floor FL and their respective separation distances of 1000, 0.0,
It is specified by 0.0. <G> Changing the height of the floor level (FL) The upper end of the pillar a and the lower end of the pillar b are related to the floor level (FL) of the second floor as shown in FIG. Therefore, when the design is changed so that the height of the first floor is increased (FIG. 6A is changed to FIG. 6B), it is not necessary to change the point attributes of the columns a and b. In other words, only by changing the FL of the second floor, the length of the pillar a becomes longer by the first floor part, and the pillar b of the second floor or more.
・ Move as a whole. However, the second floor level (F
In the case of a design change such as changing the height of the first floor and the second floor by changing L), since the positional relationship of the components such as mutual members is known from the point attribute, the related components (eg, pillars) a)
It can be easily handled by returning to the kernel of the component, accessing the point attribute from there, and changing the content of the point attribute. in this way,
By displaying the position of a component with other components,
Design changes can be made easily. <H> Directionality of the surface of the wall, the backside and the member attached to the wall The surface of the wall b, the directionality of the member attached to the backside and the wall can be defined. For example, in FIG. 7, the direction from the start point to the end point of the wall b is defined as a vector direction, the right side is indicated by + on the front side, and the left side is indicated by-on the back side. This allows
The column b of the member has a distance of +800 from the wall b, and the column c of the member has a distance of -600 from the wall b. Further, it is possible to easily know whether the pillars b and c are visible or invisible by the wall b. Viewpoint p is + from wall b
If there is a separation distance of 2500, pillar b from viewpoint p
Can be seen, but pillar c cannot be seen. If the viewpoint is at a negative position, the pillar c can be seen, but the pillar b cannot be seen. When drawing a room perspective (perspective view) with a conventional CAD system, in order to calculate whether a member is visible or invisible from the viewpoint, a point between the point constituting the member and a wall that hides the member is positioned in front ( It is necessary to calculate one by one that is between the viewpoint and the wall) or on the other side, which requires a huge amount of calculation processing. However, in the CAD system of the present invention, it is possible to easily know the front side or the other side only by looking at the separation distance of the target member. In addition, it is possible to determine whether a member is in a room surrounded by a wall or not in a room. <a> As one example of the flow of the process of moving the street, the flow of the process of moving the pillars accompanying the movement of the street is shown in FIGS. The CAD system instructs the movement of the X1 core. The graphic attributes (start and end point pointers) of the X1 lines are read from the database (S1). The xyz coordinates of the start point and the end point are read from the pointers of the start point and the end point (S2). The xyz coordinates after the movement are calculated from the movement instruction data (S3). Correct the contents of the database of the xyz coordinates of the start point and the end point. That is, the coordinates after the movement are written in the database (S4). The X1 lines displayed are erased (S5). The X1 lines after the movement are displayed (S6).
Is the X1 cross point pointed by the first to third objects (S7)? If not, the process ends. If it is pointed, the process moves to the flow chart of the target process. Note that there are three types of expression methods for the point attribute. These methods include, in addition to the method of expressing the distance from three objects (surfaces) mostly handled in the present invention, the method of directly expressing the object with xyz coordinates, and the method of expressing a certain object point. It is a method of expressing by relative distance from. Actually, the graphic attribute itself has an identification code for distinguishing these methods. <B> Process flow of the object X1 As shown in FIG. 1, the graphic attribute of the point attribute whose core is pointed from the first to third objects is extracted (S10). The figure attribute is checked to take out a member that moves with the movement of the X1 line (S11). 1st to 1st pointed from figure attribute
The surface data of the third target is extracted from the database, and the position coordinates after the movement are calculated (S12). The new coordinates of the point attribute are written to the database (S13). It is determined whether all the point attributes have been rewritten (S14). If the point attribute to be rewritten remains, the process returns to step 12 (S12). If the rewriting of all point attributes has been completed, the currently displayed member before the movement is erased (S15). The moved member is displayed (S16). The process ends. The present invention has the following effects. <A> In a conventional CAD system, in order to specify a movement target, first, an area is specified by a polygon or the like, and a moving process of a point included in the area is performed. In that case, it is necessary to check for all objects whether or not they are in the area. Therefore, it takes a lot of time to specify the moving object. In contrast, the point attributes of the present invention are:
Each structural element (eg, street core, auxiliary line, wall, FL)
Are related to each other, it is possible to specify the movement of another component with respect to the movement of a certain component, and it is possible to directly process only the movement target, so that the processing speed of the program can be increased. <B> When a component is changed, the change target can be easily identified, so that the change can be automated. For example, when the FL is changed (see FIG. 6), the pillar needs to be changed as common sense in the architectural design in accordance with the change of the FL. Accompanying automatic changes can be made. <C> Since the position attributes of the constituent elements are collected into the point attributes, the processing program can be generalized and the development efficiency can be increased.
That is, in the conventional CAD system, as a method of representing the position of a component, each component has a coordinate value, so that processes such as definition, movement, and deletion of the component need to be prepared for each component. On the other hand, in the CAD system of the present invention, the expression is shared as point attributes, so that the processing program can be generalized and the development efficiency is increased. For example, point members (where the position of the member is represented by one point), line members (where the position of the member is represented by two points), and surface members (where the position of the member is represented by three points) are defined, moved, Only by preparing a processing routine for deletion and deletion, generalization can be made.

[Brief description of the drawings] FIG. 1 is a block diagram of a CAD system. FIG. 2 is a block diagram of a data control unit. FIG. 3 is a diagram showing the position of a pillar. FIG. 4 is a diagram showing the position of a pillar as it moves along the X1 street. FIG. 5 is a diagram showing the position of a wall. FIG. 6 is a view of the FL on the second floor changed. FIG. 7 is a diagram showing directionality of a wall; FIG. 8 is a flowchart of moving the X1 core. FIG. 9 is a flowchart of a target process. FIG. 10 is a diagram showing a position representation of a conventional CAD system.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masafumi Nishikawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Mari Okawa 3-3-8 Ueno, Taito-ku, Tokyo (56 References JP-A-1-195579 (JP, A) JP-A-61-286976 (JP, A) Architectural CAD Guidebook '88, Foundation of the Japan Building Center, December 10, 1988, p. 29-47 (58) Field surveyed (Int. Cl. ⁷ , DB name) G06F 17/50

Claims (1)

(57) [Claims] [Claim 1] It has a computer main body and a database
In an architectural CAD system, the database stores each type of architectural component as a ski.
Stored in the storage area of the
Stored in the kernel storage area, and the graphic information of each component
Is stored in the storage area of each graphic attribute, and the starting point of each graphic attribute is stored.
And the position coordinates of the end point are stored in the storage area of the point attribute.
The position coordinates of the start point and end point of the attribute are set to other 3
Components, the first object, the second object, and the third object
Defined by the distance, the storage area of each schema and each kernel
Pointing between them with a pointer and storing each kernel and each figure attribute
Indicate between the areas with a pointer and record each figure attribute and each point attribute.
Pointing between storage areas with a pointer , the computer accesses the database,
Type of each component, each component, graphic information of each component
Information and the position coordinates of each component using the pointer
A place where you can take out and change the design of a component
The first object, the second object, and the third object of the point attribute.
Find other components related to the component, and
A CAD system for building , characterized by correcting point attributes of (1) .