JP4498534B2 - CAD - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a CAD (Computer Design Support Device) suitable for plant design and architectural design.
[0002]
[Prior art]
(First prior art)
2. Description of the Related Art Conventionally, in a CAD that performs layout design of a plant or the like, the position and length of a piping member are specified on the display screen, for example, by specifying the position of the start and end of the piping member with a mouse. At this time, the distance on the ideographic screen determined from the two designated positions is converted into the actual length of the piping member. When an accurate length is required, when the numerical value input screen is called and the numerical value is input by the user, the length of the piping member graphic on the display screen is changed to correspond to the input numerical value.
[0003]
When a main body such as a heat exchanger and members attached to the main body are assembled on the display screen and one product is designed, the product is displayed in 3D as shown in FIG. In such 3D display, the attachment position of the member 1201 is designated with the mouse.
[0004]
[Problems to be solved by the invention]
When specifying the position and length of a member with the mouse on the CAD display screen, the length on the front screen is much smaller than the actual length. Errors are likely to occur between the values you want to use. For this reason, the user has to repeat the position designation of the mouse by trial and error, and the user's operation labor has been complicated.
[0005]
In addition, fluid actually flows through the piping members arranged on the display screen, but the direction in which the fluid flows is not known on the display screen. For this reason, much labor is required for checking the direction of fluid flow.
[0006]
Accordingly, an object of the present invention is to provide a CAD capable of reducing a user's design effort in view of the above points.
[0007]
[Means for Solving the Problems]
  To achieve these goals,The present invention provides a CAD for designing the arrangement of members within a 3D display work area on a display screen. This CAD selectively displays the guide plane and the fluid flow direction of the piping member, and instructs the display of the guide plane in which a plurality of lines are arranged at regular intervals for the display of the guide plane. In response to the display instruction of the first instruction means, the second instruction means for instructing the display position of the guide plane, and the display instruction of the first instruction means, the guide plane is set at the display position instructed by the second instruction means. Display control means for displaying in the work area. Further, for displaying the fluid flow direction of the piping member, the input means for inputting the piping member arrangement data, the display means for displaying the piping member based on the inputted piping member arrangement data, and the piping member flow Flow direction instructing means for instructing the flow direction of fluid, and display control means for moving and displaying an image representing the flow in the instructed flow direction along the displayed piping member.
[0008]
  In the CAD, the orientation of the guide plane on the 3D display may be variably settable.
[0009]
  In the above CAD, when the piping member is arranged in the work area, the guide plane is automatically displayed at the starting end position of the piping member, and the display position of the guide plane according to the designation of the end position of the piping member. Is preferably moved from the start position to the end position of the piping member.
[0010]
  In the above CAD, a plurality of guide plane shapes may be prepared so that the shape used for display can be selected.
[0011]
  In the above CAD, it is preferable that a line indicating the direction of the axis corresponding to the XYZ axes in the three-dimensional space is displayed in the guide plane different from the color of the guide plane.
[0012]
  The CAD further selectively displays the part mounting position, and for displaying the part mounting position, display means for displaying a line indicating the mounting direction of the part in the work area, and the display position of the line. Corresponding to the detected position, the indicating means for instructing, the detecting means for moving the part in the three-dimensional space along the instructed direction and detecting the position where the part or the device or member to be attached contacts. It is preferable to include display control means for displaying a part graphic at a position on the display screen.
[0013]
  In the above-described CAD, a plurality of lines may be set so that the lines are branched. For this purpose, the CAD selects a line selection means for instructing in which line direction the parts are to be attached. It is preferable to further comprise.
[0014]
  In the above-described CAD, a plurality of lines may be movable on the display screen. For this purpose, the CAD specifies a line designating unit that designates a line to be moved, a moving direction and a moving amount of the designated line. And means for indicating. The display control means moves the line on the display screen designated by the line designation means based on the instructed movement direction and movement amount.
[0015]
  In the CAD, the movement direction of the line is preferably either a linear direction or a rotation direction.
[0016]
  The present invention further provides a CAD for designing the arrangement of members by selectively displaying a guide plane and displaying a part mounting position within a 3D display work area on a display screen. The CAD includes a first instruction means for instructing display of a guide plane in which a plurality of lines are arranged at a predetermined interval, and a second instruction means for instructing a display position of the guide plane. And a display control means for displaying the guide plane in the work area at the display position designated by the second instruction means in response to the display instruction of the first instruction means. In addition, for displaying the part attachment position, a display means for displaying a line indicating the part attachment direction in the work area, an instruction means for instructing the display position of the line, and three parts along the indicated direction are displayed. Detecting means for detecting a position where the part or device to which the device or member to be attached is in contact is moved in a dimensional space; and a display control means for displaying a part graphic at a position on the display screen corresponding to the detected position. Have.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0018]
FIG. 1 shows a system configuration of CAD. In addition, since a commercially available CAD can be used, the description will be briefly given. This embodiment is characterized by a design support function realized by software. This design auxiliary function will be described later in detail.
[0019]
In FIG. 1, a CPU 10, a system memory 20, a display 30, an input device 40, a hard disk 50, and other peripheral devices are connected to a bus. The CPU 10 executes CAD software loaded in the system memory 20 to provide a CAD design function to the user.
[0020]
In addition to loading the CAD software from the hard disk 50, the system memory 20 stores input / output data for the CPU 10 and part of the operating system. The display 30 displays devices and facilities to be designed. Information to be displayed is drawn by the CPU 10 in the dedicated display area of the system memory, and the drawing data (bitmap image) is transferred to the display 30 by the CPU 10 and displayed.
[0021]
The input device 40 has a keyboard and a mouse. The hard disk 50 stores information about an operating system (software) that controls the entire system and designed devices and equipment. Various data used in the CAD software, for example, part shape data and graphic data for display, which will be described later, are stored in the hard disk in the form of files.
[0022]
(First embodiment)
Next, the guide plane display function according to the present invention will be described. The present embodiment is characterized in that a guide plane having a mesh as shown in FIGS. 6 and 9 is displayed as necessary to assist the operation of specifying the position of the device or member.
[0023]
Before explaining this auxiliary function, the configuration of the CAD display screen will be described with reference to FIG. In FIG. 5, reference numeral 501 denotes a work area in which facilities and equipment are arranged. Reference numeral 502 denotes a toolbar (including an operation selection menu). When an item on the toolbar is designated with a mouse, an information input dialog (information input sub-window) 503 and an information selection pull-down menu are displayed. The dialog 503 displayed in FIG. 5 is displayed when an item on the toolbar is designated. Reference numeral 504 denotes an area where design information related to members and devices displayed on the work area is displayed. Reference numeral 505 denotes an area for instructing that the type of design object is a piping member, equipment, or the like, or displaying the number of the equipment that is about to be arranged.
[0024]
FIG. 2 shows a processing procedure for displaying a guide plane on such a design screen. The processing procedure of FIG. 2 is incorporated in the CAD software, and is executed by the CPU 10 in an interrupted manner every time a mouse operation (input event) occurs.
[0025]
In this embodiment, a guide plane is automatically displayed. The automatic display condition is one of the following.
a) Piping member NO. Is set in area 505 or when a piping member is clicked and an extension button (not shown) is operated with a mouse,
b) When the start point position of the piping member is specified with the mouse in the work area of the display screen and the click button is operated,
When the user performs piping member design, the user performs the following operations. That is, the piping member item on the toolbar 502 is designated with the mouse to display the dialog 503 (steps S10 to S50, see FIG. 5). Next, the user sets the start position (coordinates) of the piping member in the dialog 503. The set position information is temporarily stored in the system memory 20.
[0026]
When a user newly inputs a piping member, the user sets a name, a fluid name, and a line number (not shown). When an input event occurs in accordance with this setting (OK button operation), the CPU 10 detects in step S10 in FIG. 2 that the OK button operation matches the condition b), and the CPU 10 detects the guide plane. It is determined that there is a display instruction, and the procedure proceeds to step S11. In step S11, the CPU 10 displays a guide plane according to preset setting information (see FIG. 6). The setting information includes shape information on whether the guide plane is a quadrilateral mesh or a radial mesh as shown in FIG. 9, color information about the X axis, Y axis, Z axis and guide plane, mesh spacing, and guide plane origin position information. . It is not necessary to prepare all these items, and the manufacturer may prepare any necessary items as setting information.
[0027]
In the present embodiment, the guide plane is initially displayed along the XY plane, and in this case, the X-axis and Y-axis reference lines are displayed in yellow and pink, respectively, in the guide plane color.
[0028]
In addition, the position indicated by the origin position information of the X-axis, Y-axis, and X-axis, when the starting point position of the piping member or the like is set, the starting point position of the piping member or the like is not set The center position of the work area 501 is initially set.
[0029]
When the user wants to change the orientation of the guide plane from the XY plane to the XZ plane as shown in FIG. 7, the user operates the Z key on the keyboard, and when the user wants to change from the XY plane to the YZ plane, the Z key is operated again. The CPU 10 executes the procedure shown in FIG. 2 when a key input event occurs. In step S20, the guide plane orientation instruction is detected, and the guide plane display is changed (step S21). This display change process is realized by changing the display information in the display information storage area on the system memory 20.
[0030]
In this way, when the user designates the start position of the piping member on the display screen with the mouse and moves the mouse, a click button generation event occurs, and the processing procedure of FIG. 2 is executed. In step S30, the movement direction and movement amount of the mouse (precisely the origin) is detected by the CPU 10, and the CPU 10 displays the guide plane at the position on the display screen (the end position of the piping member) corresponding to the new movement position of the mouse. Move (step S31). Thereafter, the piping member figure is displayed between the starting point position and the new movement position in the other processes in step S50 as in the conventional case (see FIG. 8). The processing described above is repeatedly executed each time the mouse moves. However, since the processing speed of the CPU 10 is very high, it seems that the display of the guide plane is moved according to the movement of the mouse to the human eye. Looks like.
[0031]
When the user operates a specific key (X key, Z key, etc.), the key operation is detected by the CPU 10 in step S40 in FIG. 2, and the shape of the guide plane is changed in step S41 as shown in FIG. The The guide plane shown in FIG. 9 displays a radial line at a specific angle in order to input piping with an angle. It is the same that the direction of the guide plane is changed by operating the X key or the Z key. As described above, in this embodiment, when the mesh-shaped guide plane is switched to the radial guide play, it is possible to provide a guide for the position when the curved piping member such as an elbow or a bender is arranged.
[0032]
When the user performs other operations similar to the conventional ones, the CPU 10 executes processing instructed by the operations in other processing in the processing procedure of FIG. When the user instructs a specific item (not shown) on the tool menu bar, the guide plane environment setting screen appears, and the user can set the setting information related to the guide plane. This process is also executed in the other processes in step S50 of FIG.
[0033]
(Second Embodiment)
Next, the display of the direction of the fluid flow of the piping member arranged on the display screen will be described.
[0034]
When the user designs the piping member on the display screen as in the conventional case, the information displayed in the area 505 of FIG. 5 on the system memory, that is, the name of the piping member, the fluid name, and the line number (member number) ), Members (straight pipes and curved pipes (elbows and benders) types and piping member start position and end position (placement information of the present invention) as one record (also called a data set) are created. Further, drawing data for drawing a figure of the piping member is stored in the table or in a separate table.
[0035]
Therefore, in the present embodiment, when this table (referred to as a piping member table) is created, the processing program of FIG. 3 (part of the CAD software) is executed with a constant cycle interruption, and is shown in FIGS. Thus, the direction of the fluid flow is expressed by painting a certain section with a different color along the piping member system and moving the section to be painted.
[0036]
Processing for this will be described next. Note that the piping member table has the same piping member name in the same system. The CPU 10 extracts a record from the top column on the piping member table, and extracts the piping member name, start point position and end position values, and member type in the record.
[0037]
Next, the graphic position information corresponding to the piping member name is extracted from the table, and an area on the upper display screen determined by the graphic information, for example, a display information storage area corresponding to the reference numeral 1001 in FIG. Fill the data area with a different color. More specifically, the display data (color data) corresponding to the reference numeral 1001 in the display information storage area on the system memory 20 is changed to a different color. Thereby, the portion denoted by reference numeral 1001 is displayed in a different color. Next, the CPU 10 searches the piping member table for a record having the same piping member name, that is, the next piping member connected to the current piping member, with the end position of the currently extracted piping member being the starting position. . If the search cannot be obtained, the search is terminated and the head position of the piping member with another name is detected. On the other hand, when a record of the piping member to be connected is found by the search, the start point position, end point position, member type, etc. included in the record and position information for drawing (hereinafter referred to as drawing information) are extracted. Thus, the area indicated by the drawing information is filled with a different color.
[0038]
In this way, the start point position and end point position of members (areas) that have the same piping member name and are to be painted in different colors are set, and the piping members in the display screen information are sequentially displayed in different colors. Fill out (loop processing in steps S100 to S150).
[0039]
It should be noted that once the area has been filled, a different color is restored after a predetermined time has elapsed (steps S120 to S130).
[0040]
When the above processing (steps S100 to S150) is repeated, continuous members of the same piping member system are filled with different color images in time series on the display screen, so that fluid flows to the user who sees this display. Looks like you are.
[0041]
The direction in which the user arranges the members is the default fluid flow direction. When the user operates a flow direction switching button (not shown) with the mouse, the operation is detected in step S140, and the loop processing of steps S100 to S150 is repeated, but it appears to the user to flow from the reverse direction.
[0042]
When the user operates an end button (not shown) with the mouse, the operation is detected in step S150, and the interrupt of this processing procedure is turned off (interrupt is canceled) (step S150). As a result, the fixed-cycle interrupt in the processing procedure of FIG. 3 is not executed. By the way, in this processing procedure, when the piping member design display screen is displayed, an interrupt is turned on when it is confirmed that a record is written in the piping member table. Thereafter, the processing procedure of FIG. A periodic interrupt is executed.
[0043]
(Third embodiment)
Next, a design support function suitable for assembly design of parts (members) will be described. In CAD, a plant to be designed and an apparatus main body are displayed in 3D (three-dimensional) on the display screen. Therefore, in the present embodiment, as shown in FIG. 12, an auxiliary line 1205 indicating the direction in which the member is to be attached is displayed on the display screen to notify the user of the attachment position of the member on the main body before the attachment. This auxiliary line is hereinafter referred to as a skewer.
[0044]
The concept of skewers is shown in FIG. The skewer is composed of a skewer shaft connecting the center and the skewer tip.
[0045]
As shown in FIG. 13 (B), it is possible to provide another skewer with a predetermined angle from an arbitrary position of the skewer shaft. In the present embodiment, the skewer that is branched and installed is called a child skewer, and the skewer that is the source of branching is called a parent skewer.
[0046]
The operation of arranging (attaching) parts to the device main body on the display screen using such skewers and the internal processing of CAD will be described in detail.
[0047]
FIG. 12 shows a CAD display screen related to skewer display. In FIG. 12, reference numeral 1201 denotes a part to be attached, which is selected from the part selection area 1204. 1202 is an apparatus main body to which a part is attached, and 1203 is an area for displaying a property indicating the content of the part to be attached. Reference numeral 1204 denotes a part selection area for selecting a part to be attached. 1205 is a skewer set in advance.
[0048]
On such a display screen, the user first sets the skewer position and displays the skewer as shown in FIG. Next, when a desired part in the part selection area 1204 is double-clicked with the mouse, the part designated by the double-clicking is arranged at a position in contact with the device main body (or member) in the skew direction.
[0049]
FIG. 4 shows a processing procedure of the CAD CPU 10 for executing the above processing.
[0050]
When the user designates an item (not shown) on the toolbar in FIG. 12 with the mouse, the CPU 10 displays a dialog (information input sub-window) for setting a skewer (step S201). An operator inputs a numerical value to this dialog from the keyboard. However, an initial setting value is predetermined in the dialog, and the setting value can be changed by inputting a numerical value from a keyboard and operating with a mouse. Use a main skewer and a child skewer. In this embodiment, the center position of the skewer, the direction of the main shaft, the direction of the auxiliary shaft, the length of the skewer, and the presence / absence of parts to be aligned are input. In the case of a child skewer, the center position of the skewer is the position of the child skewer on the parent skewer and is represented by the distance from the center position of the parent skewer. The main axis is a vector that indicates the direction of the skewer (parent skewer or child skewer). When a 3D coordinate value at an arbitrary position is input, the direction (vector) from the origin in the 3D space to the arbitrary position is determined. Is done.
[0051]
The direction of the auxiliary shaft indicates the direction of the child skewer when the child skewer is provided on the main shaft. When the child skewer further provides a grandchild skewer, it represents the direction of the grandchild skewer. The length represents the length of the main shaft. The presence / absence of the alignment target indicates whether or not the part is attached along the direction of the main shaft. The default value is none.
[0052]
Here, when the user operates the OK button on the dialog, the parent skewer is first displayed on the display screen based on the set value. When the user looks at the displayed skewer and wants to add a child skewer, the user moves the mouse cursor to a desired position of the parent skewer on the display screen and clicks with the mouse click button (see FIG. 15A). The CPU 10 determines that the skewer is to be added (step S210), and the user who displays the above-described skewer information input dialog uses this dialog to determine the position of the skewer center, the direction of the main shaft, and the direction length of the auxiliary shaft. Specify the presence / absence of parts to be matched. Based on the input information, the CPU 10 is additionally displayed (see FIG. 15B) and the input information is stored in the system memory 20 (step S211).
[0053]
In the present embodiment, the position and orientation of the skewer are set by numerical input, but the position and orientation can also be adjusted by moving the skewer on the display screen with a mouse.
[0054]
As shown in FIG. 16 (A), the user moves the mouse to the right with the mouse button positioned at the center position of the skewer and pressing the click button. As a result, the skewer on the display screen moves linearly to the right while keeping the direction as the mouse moves.
[0055]
In addition, when the mouse cursor is moved to the skewer tip and moved while the click button is pressed, the center of the skewer is determined in advance in the three-dimensional space by the auxiliary axis along the moving direction. The skewer rotates on a plane determined from the direction (see FIG. 16B). The moving state of the skewer in the three-dimensional space is also displayed in 3D on the display screen.
[0056]
The CPU 10 identifies the rotational movement by designating the skewer tip with the mouse, and identifies the parallel movement of the skewer by designating the center of the skewer (step S240).
[0057]
In accordance with the identified type of movement, the CPU 10 calculates the movement direction and movement amount in the three-dimensional space according to the movement of the mouse, and moves the display position of the skewer on the display screen according to the calculation result ( Step S241 → S242).
[0058]
When the user determines the attachment direction of the parts in this manner, the user selects a desired part in the part selection area of FIG. 12 by operating the mouse. When the CPU 10 detects this operation in step S220, the CPU 10 extracts the direction information related to the skewer designated to be matched in the above-described dialog from the system memory 20. Next, the part selected along the skewer direction in the three-dimensional space is moved toward the center of the skewer to detect the position in contact with the device or member. This detection position is automatically determined as the part attachment position, and the graphic of the selected part is displayed at the corresponding position on the display screen (steps S221 → S222).
1) The reference axes (X, Y, Z axes) of the guide plane of the first embodiment are displayed in a color different from the color of the guide plane. However, when a black and white screen is used, the reference axis is thick and the guide plane is It is only necessary to draw a fine mesh.
2) In the first embodiment, a mode for displaying a guide plane and a mode for not displaying a guide plane are provided, and when a mode for displaying a guide plane is set by the user, the guide plane is automatically displayed and the guide plane is associated with the movement of the mouse. Processing such as moving display may be performed.
3) In the first embodiment, an example in which piping member design is performed has been shown. However, when a length is specified with a specific structure with a mouse, for example, a guide plane is automatically displayed when a steel frame is specified. You may let them. Of course, the display position may be moved by operating the mouse separately from the design of the length of the design object.
4) In the second embodiment, the description order of the piping member information described in the piping member table and the direction of the fluid are shown. However, information indicating the direction of the fluid flow may be described in the piping member table. In this case, it is not necessary to distinguish the start point and the end point. It is only necessary to determine whether the two end point information is the start point or the end point based on the information indicating the direction of fluid flow.
5) The image for indicating the flow of fluid in the second embodiment can be moved and displayed using a graphic such as a → (arrow) symbol in addition to the filled image.
[0059]
Various modifications can be made to the above-described embodiment. However, as long as the modification is based on the technical idea described in the claims, the modification falls within the technical scope of the present invention.
[0060]
【The invention's effect】
As described above, according to the first to fifth aspects of the present invention, since the position and length of a member or the like to be arranged can be accurately grasped by the distance between the lines of the guide play, the number of trial and error arrangements can be reduced. Thus, the user's design effort can be reduced.
[0061]
According to the sixth aspect of the present invention, since the image showing the flow moves along the flow direction, the user can easily confirm the flow direction. This reduces user trial and error work.
[0062]
According to the seventh to tenth aspects of the present invention, since it is displayed on the display screen indicating the mounting direction of the member, the user can confirm the position of the mounting destination by the line. Moreover, since the attachment position of the member along that direction is automatically calculated, the installation position is more accurate than the manual placement by the user. This reduces user trial and error work.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a system configuration of an embodiment of the present invention.
FIG. 2 is a flowchart showing a processing procedure for guide plane display control executed by a CPU 10;
FIG. 3 is a flowchart illustrating a processing procedure for flow direction display control executed by a CPU.
FIG. 4 is a flowchart illustrating a processing procedure for skew display control executed by a CPU.
FIG. 5 is an explanatory diagram illustrating an example of a CAD display screen.
FIG. 6 is an explanatory diagram for describing guide plane display control;
FIG. 7 is an explanatory diagram for explaining guide plane display control;
FIG. 8 is an explanatory diagram for explaining guide plane display control;
FIG. 9 is an explanatory diagram showing the shape of another guide plane.
FIG. 10 is an explanatory diagram showing an example of a display showing the flow of fluid.
FIG. 11 is an explanatory diagram showing an example of a display showing the flow of fluid.
FIG. 12 is an explanatory diagram for explaining display control contents of lines (skewers) for attaching parts.
FIGS. 13A and 13B are explanatory diagrams for explaining display control contents of lines (skewers) for attaching parts.
FIG. 14 is an explanatory diagram for explaining display control contents of lines (skewers) for attaching parts.
FIGS. 15A and 15B are explanatory diagrams for explaining display control contents of lines (skewers) for attaching parts.
FIGS. 16A and 16B are explanatory diagrams for explaining display control contents of lines (skewers) for attaching parts.
[Explanation of symbols]
10 CPU
20 System memory
30 display
40 input devices
50 hard disks

Claims (10)

In CAD for designing the arrangement of members in the work area of 3D display on the display screen,
Selectively display the guide plane and the fluid flow direction of the piping members,
A first instruction means for instructing display of a guide plane in which a plurality of lines are arranged at regular intervals for the display of the guide plane;
Second indicating means for indicating a display position of the guide plane;
Display control means for displaying the guide plane in the work area at the display position instructed by the second instruction means in response to the display instruction of the first instruction means;
In order to display the fluid flow direction of the piping member, an input unit that inputs piping member arrangement data, and a display unit that displays the piping member based on the input piping member arrangement data,
Flow direction indicating means for indicating the flow direction of the fluid flowing through the piping member;
CAD comprising display control means for moving and displaying an image representing a flow in the instructed flow direction along the displayed piping member. The CAD according to claim 1, wherein a direction of the guide plane on 3D display can be variably set. 2. The CAD according to claim 1, wherein when the piping member is arranged in the work area, the guide plane is automatically displayed at the starting end position of the piping member, and the end position of the piping member is designated. CAD in which the display position of the guide plane moves from the start position to the end position of the piping member. The CAD according to claim 1, wherein a plurality of shapes of the guide plane are prepared, and a shape used for display can be selected. 2. The CAD according to claim 1, wherein a line indicating a direction of an axis corresponding to an XYZ axis in a three-dimensional space is displayed in the guide plane differently from a color of the guide plane. The CAD according to claim 1, further comprising: a display unit that selectively displays a part mounting position and displays a line indicating a part mounting direction in the work area for displaying the part mounting position. When,
Indicating means for indicating the display position of the line;
Detecting means for moving the part in a three-dimensional space along a line indicating the mounting direction of the part, and detecting a position where the part or device to which the part is attached contacts the part;
CAD comprising display control means for displaying a graphic of the part at a position on the display screen corresponding to the detected position. 7. The CAD according to claim 6, wherein a plurality of lines can be set so that the lines are branched, and a line selection unit that indicates in which line direction of the plurality of lines the parts are to be attached. CAD further comprising 8. The CAD according to claim 7, wherein the plurality of lines are movable on a display screen, and designates a line designation means for designating a movement target line, a movement direction and a movement amount of the designated line. CAD, wherein the display control means moves a line on the display screen designated by the line designation means based on the instructed movement direction and movement amount. The CAD according to claim 8, wherein the moving direction of the line is one of a linear direction and a rotational direction. In CAD for designing the arrangement of members in the work area of 3D display on the display screen,
Display the guide plane and the parts installation position selectively.
A first instruction means for instructing display of a guide plane in which a plurality of lines are arranged at regular intervals for the display of the guide plane;
Second indicating means for indicating a display position of the guide plane;
Display control means for displaying the guide plane in the work area at the display position instructed by the second instruction means in response to the display instruction of the first instruction means;
Display means for displaying a line indicating the attachment direction of the parts in the work area for displaying the parts attachment position;
Indicating means for indicating the display position of the line;
Detecting means for moving the part in a three-dimensional space along a line indicating the mounting direction of the part, and detecting a position where the part or device to which the part is attached contacts the part;
CAD comprising display control means for displaying a graphic of the part at a position on the display screen corresponding to the detected position.

Images