JP3789450B2 - CAD system - Google Patents

Description

  The present invention relates to a CAD system that creates a drawing by arranging figures corresponding to objects on a screen, and more particularly to a CAD system that is used for creating architectural drawings.

  In a building CAD system, pillars, walls, joinery, etc. are handled as objects. And the drawing for construction is created by arrange | positioning the figure which shows various objects in the desired position on a screen. In general, a pointing device such as a mouse is used for designating the location of the figure.

  By the way, when placing a figure on the screen, detailed setting items may be required. For example, when placing a wall between pillars, it is desired to place the pillar surface and the wall surface so as to form one plane. In this case, on the screen, the side of the figure representing the pillar and the side of the figure representing the wall must be aligned. As a simple method, it is possible to specify the target location while finely adjusting the position of the pointer such as the mouse when placing the wall, but this method is difficult to operate with the mouse, so it is necessary to specify the desired position. It takes time.

  Therefore, in the conventional CAD system, the offset dimension can be set. The offset dimension is set by inputting a command from the keyboard in the command input mode. When the shift dimension is set, the position where the figure is arranged is shifted from the reference point according to the set value. Therefore, the side of the figure showing the column and the side of the figure showing the wall can be matched by setting the shift dimension to an appropriate value.

  Further, when creating architectural drawings, it is necessary to create the drawings in accordance with architectural arrangement rules. For example, joinery can only be placed on a wall or the like. Therefore, a designer who creates a design drawing for architecture designates a position where a figure should be arranged while being aware of such rules.

  However, when specifying various parameters such as offset dimensions, in order to specify the values from the command line, it is necessary to know the names and contents of many parameters. Moreover, the name of the parameter is simplified to a simple character string, and the contents of the parameter cannot be understood only by the name. For this reason, the CAD system cannot be used unless it has a certain level of knowledge about the parameters.

  In addition, because architectural drawings have specific arrangement rules, the figure displayed on the screen represents what object, and what relationship there is with the object to be arranged from now on. You must always be aware of this. Furthermore, depending on the object, it is necessary to set the shape in addition to the position to be arranged. For example, in the case of a door, in which direction the door opens. As a result, the burden on the designer who creates the architectural design drawings was excessive.

  The present invention has been made in view of these points, and an object of the present invention is to provide a CAD system that can easily perform various settings relating to the position and shape of an object.

  In the present invention, in order to solve the above problems, a command selection means for selecting a command for placing a target graphic at a desired position and shape, a cursor movement means for moving a cursor on the screen, and the command are selected. Then, the related graphic detecting means for detecting a related graphic that is within a predetermined distance from the cursor and can be arranged with the target graphic among the predetermined graphic already arranged on the screen, and the command selects When the related graphic is detected, the target graphic is displayed on the cursor, and when the related graphic is detected, the target graphic is displayed on the related graphic and the command is executed. There is provided a CAD system comprising graphic display position control means for setting a display position when a command is output as an arrangement reference position of the target graphic.

  According to this configuration, the target graphic is displayed on the cursor while the cursor is away from the related graphic, and when the cursor approaches the related graphic, the target graphic moves on the related graphic. By inputting a command execution command in this state, the target graphic can be easily placed on the related graphic.

  Also, command selection means for selecting a command for placing the target graphic at a desired position and shape, placement position determination means for determining the placement reference position of the target graphic that is the operation target, and a cursor on the screen are moved. The position when the cursor moving means and the position or shape of the target figure for which the placement reference position is fixed are changed based on the placement reference position according to the position of the cursor, and the command execution command is output And a graphic shape control means for arranging the target graphic in a shape, a CAD system is provided.

  According to this configuration, by moving the position of the cursor, it is possible to change the position and shape of the target graphic in a state where the arrangement reference position is fixed. For this reason, the arrangement position and shape can be easily determined.

  As described above, according to the present invention, when a target graphic of a selected command is displayed, if there is a related graphic near the cursor, the graphic displayed on the cursor can be superimposed. Since the movement range is limited to the related graphic, the position where the graphic is arranged can be easily selected.

  Also, with the figure placement reference position fixed and the specified direction of various directional parameters not fixed, the specified direction is changed according to the cursor position, and the figure shape or position is changed at the same time. Therefore, the arrangement position and shape can be easily specified by moving the cursor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram of a CAD system that facilitates numerical input of parameters. The command selection means 1 selects a command for arranging the target graphic at a desired position and shape. The parameter management means 2 holds the parameter 2a used for executing the selected command, and displays the value set in the parameter 2a in the parameter field 3a in the display screen 3.

  The creator of the drawing confirms the parameters required for the selected command by checking the parameter field 3a. Then, the parameter input means 5 inputs a desired value for the parameter. When there is a command execution command, the command execution means 4 determines the position and shape of the target graphic using the value set in the parameter 2 a and places the target graphic in the drawing display area 3 b in the display screen 3. .

  Thereby, even if it does not memorize | store the name and the content of many parameters, a required parameter can be set exactly. Hereinafter, this function is referred to as a positioning box function.

  Next, an example of a hardware configuration of a CAD system for implementing the contents of FIG. 1 will be described. FIG. 2 is a block diagram showing a hardware configuration of the CAD system. In this example, it is assumed that the system is a multi-window system, and the CAD software is architectural CAD software.

  This CAD system is configured around a processor (CPU) 11. The processor 11 controls the basic operation of each device connected to the bus 22 according to a program group stored in the ROM 12. Further, the processor 11 executes various data processing in accordance with an operating system (OS) loaded in the RAM 13. The RAM 13 is loaded with the OS when the power is turned on, and loaded with the CAD software program when creating the architectural drawing. The RAM 13 also stores temporary calculation data, display data, and the like of the program being worked on.

  The graphic control device 14 converts a digital signal such as graphic data or character data into a raster signal for display and sends it to the display device 15. The display device 15 displays these graphics, characters, and the like. As the display device 15, a CRT or a liquid crystal display device is used.

  The keyboard 16 is composed of numeric keys, character keys, and the like, and performs input of parameters for objects defined by CAD software, display commands for various CAD data, and the like. The mouse 17 controls the position of the mouse cursor on the display device 15 and inputs various commands at the position of the mouse cursor.

  The hard disk drive (HDD) 19 stores various data such as CAD data in addition to an operating system program and CAD software program to be loaded into the RAM 13. CAD data is stored in a data format that can be recognized by CAD software. The floppy disk drive (FDD) 18 reads data stored in the floppy disk 18a and writes the created data to the floppy disk 18a.

  The printer 20 prints out a drawing or the like created using CAD software on paper. The plotter 21 draws a drawing with a set pen so as to draw on the paper by hand.

The positioning box function will be specifically described using such a hardware configuration.
FIG. 3 is a block diagram showing the configuration of the positioning box function. In the window 40, there are a drawing display area 41 for displaying the drawing being created, a coordinate field 42 for displaying the coordinates of the position of the mouse cursor on the screen, and a parameter field 43 for displaying the current parameters of the object to be operated. Is provided.

  The cursor control unit 31 receives an input from the mouse 17 and controls the position of the mouse cursor 41 a in the window 40. Then, the current position of the mouse cursor 41a is notified to the coordinate field control unit 32. When a command is selected by operating the mouse 17, the command processing unit 33 is notified of the command and the current position of the mouse cursor 41a is notified. Conversely, when the coordinate information of the mouse cursor 41a is received from the coordinate field control unit 32, the mouse cursor 41a is moved to that position.

  The coordinate field control unit 32 includes a coordinate data holding area and a relative coordinate data holding area. When the position information of the mouse cursor 41a is received from the cursor control unit 31, the data is set in the coordinate data holding area and the difference (relative coordinates) from the previously designated coordinates is set in the relative coordinate data holding area. Further, the set coordinate data and relative coordinate data are displayed in the coordinate field 42. When a coordinate update command is input from the keyboard 16 by designating coordinates in the coordinate field 42, the value is held and reflected in the coordinate field 42, and the updated coordinate information is transmitted to the cursor control unit 31. .

  When a command is commanded from the cursor control unit 31, the command processing unit 33 displays a graphic 41 b corresponding to the command at the position of the mouse cursor 41 a in the drawing display area 41. At this time, the parameter field control unit 34 is notified of parameter information necessary for the selected command. When the parameter change value is received from the parameter field control unit 34, the shape of the graphic 41b is changed according to the value. Furthermore, when a command confirmation command is received from the cursor control unit 31, the command is executed according to the parameters set at that time.

  The parameter field control unit 34 has a data holding area for storing parameters. When the input item name of the parameter necessary for the currently selected command is acquired from the command processing unit 33, the input item name is displayed in the parameter field 43. At this time, the default value of each parameter is acquired and stored in the data holding area, and the value is displayed in the parameter field 43. When a parameter update command is input from the keyboard 16, the updated value is stored in the data holding area, and the value is displayed in the parameter field 43. Further, the command processing unit 33 is notified of the displayed parameter value. Information on whether or not each parameter can be input is also acquired from the command processing unit 33. If the input from the keyboard 16 is for a parameter that cannot be input, the input is rejected.

  FIG. 4 is a flowchart showing the processing procedure of the positioning box function. This process indicates a process executed by the coordinate field control unit 32 and the parameter field control unit 34 when an event is input by a mouse operation.

  [S1] The cursor control unit 31 determines the type of the input event. If the cursor is moved, the process proceeds to step S2, if the command is selected, the process proceeds to step S8, and if the command execution is started, the process proceeds to step S16.

The following steps S2 to S7 are processing when it is determined that the event is a cursor movement, and the coordinate field control unit 32 executes the processing.
[S2] The position information of the cursor is acquired.

[S3] The coordinate data (previous coordinate data) at the time of execution of the previous command is acquired.
[S4] Relative coordinates are calculated from the cursor position information and previous coordinate data.
[S5] The cursor position information is set in the coordinate data holding area.

[S6] The relative coordinates are set in the relative coordinate data holding area.
[S7] The data in the coordinate data holding area is displayed in the "coordinate" display area of the coordinate field 42, and the data in the relative coordinate data holding area is displayed in the "distance" display area. Then, it returns to step S1.

The following steps S8 to S15 are processing when it is determined that the event is a command selection, and the parameter field control unit 34 executes the processing.
[S8] The input item name of the input item for the selected command is acquired.

[S9] The default value of the input item is acquired from the command processing unit 33.
[S10] The input item name and default value are displayed in the parameter field 43 and transmitted to the command processing unit 33.

  [S11] The input is accepted, the type of input is determined, and if it is a parameter input from the keyboard 16, the process proceeds to step S12. If a parameter confirmation operation (tab key, return key, shift tab key) is input, the process proceeds to step S14. If another event such as the start of command execution occurs, the process returns to step S1.

[S12] The input data is set in the data holding area.
[S13] The contents of the data holding area are displayed in the parameter field.
[S14] Data is acquired from the parameter field.

  [S15] The data set in the parameter field is transmitted to the command processing unit 33 through the command basic drawing class, and the process proceeds to step S11. The command processing unit 33 that has received this data changes the shape of the graphic displayed on the screen according to the value of the parameter.

The next step S16 is processing when it is determined that the event is a command execution.
[S16] The coordinate field control unit 32 transmits the content of the notified coordinate field to the command processing unit 33, and the parameter field control unit 34 transmits the content of the notified parameter field to the command processing unit 33. The command processing unit 33 executes a command based on the received data.

  In this way, when a command is selected by operating the mouse, the input item name required to execute the command is displayed in the parameter field, so the person who creates the drawing must remember the parameters required for the command. There is no. Therefore, the burden on the drawing creator is reduced. Moreover, since all necessary parameters are displayed on the screen, it is possible to prevent mistakes such as forgetting to set parameters or overlooking the setting of incorrect values. Efficiency is improved.

Examples of executing various commands are shown below.
FIG. 5 shows a CAD software window 40. A menu bar 44 is provided at the top of the window 40. When a mouse cursor is moved on the menu bar 44 and a mouse button is clicked, a pull-down menu is opened. Various items can be selected by selecting an item therein. Can be executed. A toolbar 45 is provided below the menu bar 44. The toolbar 45 iconsize frequently used functions among the functions set in the menu bar 44, and various functions can be executed by clicking a mouse button on the target icon.

  The lower left of the toolbar 45 is a drawing display area 41. In this figure, a plan view of the first floor of the building is displayed. On the right side of the drawing display area 41, there are a coordinate field 42, a parameter field 43, and a tool area 46 from the top. The coordinate field 42 includes areas indicating absolute coordinates (“X coordinate” and “Y coordinate” in the figure) and areas indicating relative coordinates from the previous command execution position (“X distance” and “Y distance” in the figure). ). The parameter field 43 is provided with six parameter display areas. The tool area 46 is provided with various icons for inputting auxiliary commands for command execution.

  FIG. 6 is a diagram showing a screen at the time of selecting a command for arranging columns. In the drawing, the vertical direction is the Y axis, and the horizontal direction is the X axis (the same applies to FIGS. 7 to 10 below). A command for setting a column is selected by opening a construction construction pull-down menu in the menu bar 44 (shown in FIG. 5) and selecting a column item in the menu (44 “wall” in the following description). The same applies to “joint”. When a column command is selected, a graphic 51 indicating a column object is displayed in the drawing display area 41. This pillar is a square pillar.

In general, the installation position of the column is set with reference to the cores 52 and 53. Therefore, the parameter input item names are “dimension X”, “dimension Y”, “offset X”, “offset Y”, and “angle”, and these input item names and their values are displayed in the parameter field 43. Has been. “Dimension X” and “Dimension Y” indicate the lengths (d _1X , d _1Y ) of the column sides in the X-axis direction and the Y-axis direction. “Deviation X” and “Deviation Y” indicate lengths (d _2X , d _2Y ) protruding from the core in the X-axis direction and the Y-axis direction. “Angle” indicates a rotation angle when rotating around the reference point.

  In this figure, the mouse cursor 54 is expressed by a cross hair cursor. The intersection of the vertical line 54a and the horizontal line 54b of the crosshair cursor is the position of the mouse cursor 54, and the coordinates of this position and the relative coordinates from the previous coordinate data are displayed in the coordinate field 42. .

FIG. 7 is a diagram showing a screen when selecting a command for placing a wall.
When a command for setting a wall is selected, a figure 61 indicating a wall is displayed in the drawing display area 41. The walls are also set with reference to the cores 62 to 64 in the same manner as the columns. The input item names of the parameters are “wall thickness”, “close dimension”, “first point appearance”, “second point appearance”, and these input item names and their values are displayed in the parameter field 43. ing. “Wall thickness” indicates the wall thickness d ₃ . “Rough dimension” indicates a length d ₄ protruding from the core 62. “First point appearance” indicates a length d ₅ that protrudes from the core 63. The “second point appearance” indicates the length d ₆ that protrudes from the core 64.

The position of the mouse cursor 54 is displayed in the coordinate field 42.
Here, the case where a door is provided on the wall shown in FIG. 7 will be described. FIG. 8 is a diagram showing a screen at the time of selecting a command for placing a one side opening joinery. When a command for setting one side opening joinery is selected, “opening width 1”, “opening width 2”, “frame thickness”, “frame out”, and “offset” are input to the parameter field 43 as parameter input items. Is displayed. “Opening width 1” is the width d ₇ of the door that opens to the left in the drawing. “Opening width 2” is the width d ₈ of the door that opens to the right in the drawing. "WakuAtsu" is the thickness d ₉ of the door frame. “Frame out” is the length d ₁₀ of the door frame protruding from the wall. “Offset” is the distance d ₁₁ from the offset reference point to the placement reference point.

  Here, the parameter value shown in FIG. 8 is assumed to be a default value, and a case where the parameter value is changed will be described. In FIG. 8, the value of “opening width 1” is “600”, and the value of “opening width 2” is “800”. Accordingly, the joinery figure 71 is a figure that opens the door to the left and right. When the tab key is pressed in this state, parameters can be input. Then, the value of “opening width 1” is changed to “0”. FIG. 9 is a diagram showing a screen after changing parameters. The figure 71 of the joinery is deformed so that the door opens only on one side. When the command is executed in this state, the arrangement position and shape of the graphic 71 are determined. And the command for arrange | positioning the same fitting is selected, and the figure 72 of the same shape can be arranged continuously.

FIG. 10 is a diagram showing a screen at the time of selecting a command for placing the draw joinery. When a command for setting a sliding joinery is selected, “opening width”, “frame thickness”, “frame out”, “offset”, and “repetition” are displayed in the parameter field 43 as parameter input items. The "Opening width" is the size of d ₁₂ of door. “Frame thickness” is the length d ₁₃ of the frame walls 73a and 73b. “Frame out” is the length d ₁₄ of the portion protruding from the surface of the wall 61 of the frame walls 73a and 73b. “Offset” is a distance d ₁₅ from the offset reference point to the placement reference point. “Repetition” is the number of “drawings” arranged. At this time, there is only one frame between the two draws.

  As described above, the input item name in the parameter field also changes according to the selected command. The creator of the drawing can know what parameters need to be input by confirming the input item name. In addition, if the parameter value is changed by inputting a numerical value from the keyboard, the value is displayed in the parameter field, and the shape of the figure displayed in the drawing display area changes according to the parameter value. The suitability of the value can be easily confirmed visually. Further, since each parameter is aggregated in the parameter field 43 and coordinates are also aggregated in the coordinate field 42, it is easy to confirm numerical values. The above mainly simplifies the input of parameters and facilitates the placement of the figure, but the shape and placement position of the figure can be easily specified by operating the mouse.

  FIG. 11 is a principle configuration diagram of the present invention in which the position and shape of an object are determined by operating a pointing device. The command selection means 6 selects a command for arranging the target graphic 3bb at a desired position and shape. The cursor moving means 7 moves the cursor 3ba displayed in the drawing display area 3b of the display screen 3. When a command is selected, the related graphic detection means 8 is a related graphic that is located within a predetermined distance from the cursor 3ba among the fixed figures already arranged on the screen and can place the target graphic on the fixed figure. The figure 3bc is detected. The graphic display position control means 9 displays the target graphic 3bb on the cursor 3ba until the related graphic 3bc is detected, and displays the target graphic 3bb on the related graphic 3bc when the related graphic 3bc is detected.

  Thus, the target graphic can be placed on the desired graphic by simple cursor movement. Below, the case where a figure is arrange | positioned by operation of a mouse | mouth is demonstrated concretely taking the case where a fitting is arrange | positioned as an example.

  FIG. 12 is a flowchart showing a processing procedure when placing the joinery. This process is started when a joinery placement command is selected. This processing is performed by the related graphic detection means 8.

[S21] The occurrence of a mouse movement event is detected.
[S22] A graphic near the mouse cursor is searched.
[S23] The attribute of the searched figure is acquired. If the figure is a wall, the wall thickness and length are acquired. At this time, the object type in the object data is also acquired in order to determine the type of the figure.

[S24] It is determined whether or not the figure is a wall from the acquired object type. If the figure is a wall, the process proceeds to step S25. If not, the process ends.
[S25] The shape to be displayed is calculated. This is a calculation for using the wall thickness of the detected wall to make the thickness of the frame of the joinery match the wall thickness.

[S26] The movable range is calculated. This movable range is determined according to the length of the wall.
[S27] A dragging display is displayed. Here, the dragging display means changing the expression form of the graphic indicating the wall, and the graphic display position control means 9 moves the graphic displayed at the position of the mouse cursor onto the graphic indicating the wall and displays it. That is. For example, a wall that has been displayed in black is displayed in light blue, and the figure indicating the wall is displayed on the figure indicating the wall by the movement of the cursor.

When any figure is displayed in the rubber band, the figure display position control means 9 moves the figure displayed at the position of the mouse cursor onto the figure displayed in the rubber band.
Searching for a figure near the mouse cursor and whether or not the figure to be operated can be overlaid is performed based on the object data. Each figure is displayed on the screen by changing the object data into a visual figure. Therefore, the graphic information can be obtained by examining the object data.

  FIG. 13 is a diagram showing the structure of data generated when creating a joinery. This is a case where a sliding joinery is arranged. The object data 80 includes data of an object identification number, an object type, a head primitive, a system attribute link, and a user attribute link. The object identification number is a unique number for identifying the object. The object type is a code indicating that the object is a joinery. The head primitive indicates the position of the primitive data 91 that is the head. The system attribute link indicates link information to the system attribute data 90 for specifying the attribute of the object. The user attribute link indicates link information to data indicating the attribute of the user when the system setting is changed for each user.

  The system attribute data 90 indicates the types of parameters necessary for determining the arrangement position and shape of each object. Data such as opening width, wall thickness, frame thickness, frame out, etc. are set in the system attribute data of the draw joiner.

  The primitive data 91 and 92 are data such as lines that serve as a basis for displaying an object graphic on the screen. That is, a figure indicating an object such as joinery is represented by a set of a plurality of primitive data. Each primitive data 91 and 92 includes data such as a primitive identification number, a NEXT pointer, and a point data link. The primitive identification number is a unique number for specifying the primitive data 91 and 92. The NEXT pointer indicates the position of the next primitive data. The point data link indicates link information to point data.

  The point data 100 stores position information 110, 120, and 130 necessary for drawing a figure basically by the primitive data 91. Each position information 110, 120, 130 stores a flag, an X coordinate, and a Y coordinate. The flag indicates whether or not the coordinates indicated by the position information 110, 120, and 130 are valid.

  When the related graphic detecting means 8 detects a graphic near the mouse cursor, the related graphic detecting means 8 acquires data of the graphic. Whether the figure is a wall is determined from the object type of the data. Further, the position of the figure is discriminated from the point data. In this way, it is possible to detect a figure that can be arranged with overlapping figures to be operated.

  FIG. 14 is a diagram showing a change in a figure when a fitting is brought close to a wall. (A) has shown the state from which the fitting 141 and the wall 143 are fully separated. At this time, the wall 143 is drawn with a black solid line. The joiner 141 is displayed at the position of the mouse cursor 142. By moving the mouse cursor 142 from this state, the joiner 141 is brought closer to the wall 143.

  (B) has shown the state in which the fitting 141 and the wall 143 approached. In the drawing, the wall 143 is indicated by a dotted line, but actually the color is changed to a conspicuous color and displayed. The joinery 141 is displayed on the wall 143 away from the position of the mouse cursor 142. The position of the fitting 141 is an intersection of the perpendicular and the wall 143 when the perpendicular is drawn from the mouse cursor 142 to the wall 143, but does not protrude from the wall 143. That is, the fitting 141 is displayed on the wall 143 at the position closest to the mouse cursor 142. Further, the thickness of the frame of the joinery 141 is calculated from the wall 143 wall thickness.

  In this way, by bringing the joinery 141 closer to the wall 143, the joinery 141 moves onto the wall 143, and the mouse cursor 142 moves in parallel with the wall 143. To move. When the button on the left side of the mouse is clicked, the value of each parameter is converted to the position at that time, and the arrangement reference position of the fitting 141 is determined. If the escape key is pressed without clicking the button, the joiner 141 can be freed from the wall 143.

  Here, the placement reference position is a reference position for placing a figure. That is, the final arrangement position is determined by performing correction or the like on the arrangement reference position using the parameter value.

  When the arrangement reference position for arranging the joinery is determined, the arrangement position and the shape of the figure are determined next. For this purpose, the final arrangement position and shape can be selected by moving the position of the mouse cursor while continuing to hold down the mouse button pressed to determine the arrangement reference position.

  FIG. 15 is a diagram for explaining a method for selecting an arrangement shape. (A) has shown the state which determined the arrangement position. In this example, for the sake of clarity, it is assumed that the mouse cursor 142 is moved on the wall 143 and then the mouse button is clicked. Then, the mouse cursor 142 is moved while the button is pressed.

  (B) has shown the state which moved the mouse cursor 142 to the upper left. In this case, the door of the joinery 142 opens on the upper left side in the figure. (C) shows a state in which the mouse cursor 142 is moved to the upper right. In this case, the door of the joinery 142 opens to the upper right side in the drawing. (D) shows a state in which the mouse cursor 142 is moved to the lower left. In this case, the door of the joinery 142 opens to the lower left side in the figure. (E) shows a state in which the mouse cursor 142 is moved to the lower right. In this case, the door of the joinery 142 opens to the lower right side in the figure.

  In this way, the shape of the joinery 141 can be changed only by moving the mouse. If the mouse button is released when the target shape is achieved, the arrangement position and shape are determined in that state.

  In the above description, since the case where the joinery is arranged on the wall has been described, the example in which the door opening direction changes according to the position of the mouse cursor has been described. However, the same operation can be performed when other figures are arranged. it can. That is, some parameters set when placing a figure do not specify the position and shape of the figure unless the direction is specified. These directions can be specified by moving the mouse cursor. For example, in the case of arranging a wall for which “side” is set, the direction of the side can be changed according to the position of the mouse cursor. By determining the designated direction of the parameter having the directionality such as the deviation, the final arrangement position is determined.

It is a block diagram of a CAD system that facilitates numerical input of parameters. It is a block diagram which shows the structure of the hardware of a CAD system. It is a block diagram which shows the structure of a positioning box function. It is a flowchart which shows the process sequence of a positioning box function. It is a figure which shows the window of CAD software. It is a figure which shows the screen at the time of the command selection for arrange | positioning a pillar. It is a figure which shows the screen at the time of the command selection for arrange | positioning a wall. It is a figure which shows the screen at the time of the command selection for arrange | positioning the joiner of one side opening. It is a figure which shows the screen after parameter change. It is a figure which shows the screen at the time of the command selection for arrange | positioning the joinery of a drawing. It is a principle block diagram of this invention which determines the position and shape of an object by operation of a pointing device. It is a flowchart which shows the process sequence at the time of arrange | positioning joinery. It is a figure which shows the structure of the data produced | generated at the time of joinery creation. It is a figure which shows the change of the figure when a fitting is brought close to the wall. (A) is a figure which shows the state from which the joinery and the wall are fully separated, (B) is a figure which shows the state in which the joinery and the wall approached. It is a figure explaining the selection method of arrangement | positioning shape. (A) is a figure which shows the state which determined the arrangement position, (B) is a figure which shows the state which moved the mouse cursor to the upper left, (C) is a figure which shows the state which moved the mouse cursor to the upper right. Yes, (D) is a diagram showing a state where the mouse cursor has been moved to the lower left, and (E) is a diagram showing a state where the mouse cursor has been moved to the lower right.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,6 Command selection means 2 Parameter management means 2a Parameter 3 Display screen 3a Parameter field 3b Drawing display area 4 Command execution means 5 Parameter input means 7 Cursor movement means 8 Related figure detection means 9 Graphic display position control means 31 Cursor control section 32 Coordinate field control unit 33 Command processing unit 34 Parameter field control unit

Claims (3)

In a CAD system that creates drawings by arranging figures on the screen,
Command selection means for selecting a command for placing the target graphic at a desired position and shape;
A cursor moving means for moving the cursor on the screen;
When the command is selected, related graphic detection means for detecting a related graphic within a predetermined distance from the cursor and capable of overlapping the target graphic among the already determined graphic already arranged on the screen; ,
When the command is selected, the target graphic is displayed on the cursor until the related graphic is detected, and when the related graphic is detected, the target graphic is displayed on the related graphic, Graphic display position control means that uses the display position when the command execution command is output as the reference position of the target graphic;
A CAD system characterized by comprising:   2. The CAD system according to claim 1, wherein the graphic display position control means moves the target graphic to a position closest to the cursor on the related graphic. In a CAD system that creates drawings by arranging figures on the screen,
Command selection means for selecting a command for placing the target graphic at a desired position and shape;
Arrangement position determining means for determining an arrangement reference position of the target graphic when the command is selected;
A cursor moving means for moving the cursor on the screen;
The position or shape of the target graphic in which the placement reference position is determined is changed based on the placement reference position according to the position of the cursor, and the target is the position and shape when the command execution command is output. Figure shape control means for arranging figures;
A CAD system characterized by comprising:

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