JP4478493B2 - Drawing creation program and drawing creation method - Google Patents

Description

The present invention relates to a drawing creation program and a drawing creation method for obtaining element information from a three-dimensional model using a modeling kernel and creating a drawing for the three-dimensional model based on the obtained element information. The present invention relates to a drawing creation program and a drawing creation method capable of creating a drawing required by a designer.

  Conventionally, there has been devised a drawing creation program for generating a 3D model of a part or the like using 3D CAD (3 dimension Computer Aided Design) and automatically creating a drawing of the part or the like from the generated 3D model.

  When creating a drawing from a 3D model, this drawing creation program uses a module called a modeling kernel that can extract element information (information such as hidden lines, contours, start point coordinates, and end point coordinates) from the 3D model. Was.

  That is, the conventional drawing creation program uses a modeling kernel to obtain element information from a 3D model such as a part, and creates a drawing of the part or the like based on the obtained element information.

  In the graphic data processing method described in Patent Document 1, in order to increase the efficiency of drawing, information related to a structure to be drawn is stored in advance in a storage area, and the information stored in the storage area is stored in the storage area. A drawing of the structure is created using.

JP 63-217472 A

  However, the conventional technique has a problem that accurate element information cannot be obtained from a 3D model using a modeling kernel, and a drawing required by a designer cannot be created accurately.

  Specifically, the modeling kernel has a concept of a part and a concept of a feature indicating a hole or a protrusion existing in the part, and element information of each part unit or a pre-existing feature unit can be accurately extracted. Element information cannot be accurately extracted from features generated when parts are combined.

  Therefore, even if it is a 3D model in which each part is combined and a new feature is generated, accurate element information is obtained by using a modeling kernel, and a drawing required by the designer is created accurately. Was an extremely important issue.

The present invention has been made to solve the above-described problems caused by the prior art and to solve the problems. It is possible to obtain accurate element information from a 3D model and create a drawing required by a designer. An object is to provide a drawing creation program and a drawing creation method .

In order to solve the above-described problems and achieve the object, the present invention obtains element information from a three-dimensional model using a modeling kernel, and draws a drawing for the three-dimensional model based on the obtained element information. It is a drawing creation program to be created, and there is a storage procedure for storing shape data constituting the three-dimensional model before editing in a storage unit, and whether there is a portion overlapping the shape data constituting the three-dimensional model If it is determined that there is a portion that overlaps the shape data constituting the three-dimensional model according to the determination procedure, the union operation is performed on the shape data that includes the overlapping portion. and editing procedures for editing a single shape data, after acquiring the element information from the shape data constituting the three-dimensional model edited in the editing procedure, the Condensing the 3-dimensional model, characterized in that to perform a change procedure for changing the shape data constituting the three-dimensional model of the unedited stored in the storage unit, to the computer.

Further, in the above invention, the determining procedure is performed the product set operation with respect to the shape data constituting the three-dimensional model, when laminate set operation result is not zero, the three-dimensional model It is characterized in that it is determined that there is a portion that overlaps the shape data to be configured .

Further, the present invention is the above invention, wherein the determination procedure further determines whether or not a non-manifold feature exists in the shape data constituting the three-dimensional model, and the editing processing procedure further includes the When it is determined by the determination procedure that non-manifold features exist in the shape data constituting the three-dimensional model, the non-manifold features are formed into parts .

The present invention is a drawing creation method in which a computer creates a drawing based on shape data constituting a three-dimensional model, and performs a set operation on the shape data constituting the three-dimensional model, When the intersection operation result is not zero, it is determined that there is a portion that overlaps the shape data that constitutes the three-dimensional model, and the shape data that constitutes the three-dimensional model that is determined that the overlapped portion exists. Perform union operation to edit into one shape data, obtain element information from the shape data constituting the edited three-dimensional model, and draw a drawing for the three-dimensional model based on the obtained element information It is characterized by creating.
Further, according to the present invention, in the above invention, the computer further determines whether or not a non-manifold feature exists in the shape data constituting the three-dimensional model, and the shape data constituting the three-dimensional model is determined. When it is determined that a non-manifold feature exists, a second editing for converting the non-manifold feature into a part is performed, and when the drawing is created, the three-dimensional model after the editing and the second editing is obtained. Element information is acquired from the shape data to be configured, and a drawing for the three-dimensional model is created based on the acquired element information.

According to the present invention, when the overlapping portions in the shape data constituting the three-dimensional model to determine whether there was determined that overlapping portions in the shape data constituting the three-dimensional model exists Since the union operation is performed on the shape data in which the overlapping portions exist and the shape data is edited into one shape data, an accurate drawing required by the designer can be created.

Shape data constituting the three-dimensional model of the pre-edited and stored in the storage unit, after acquiring the element information from the shape data constituting the three-dimensional model editing, the three-dimensional model the edit, stored in the storage unit Since it is changed to the shape data constituting the three-dimensional model before editing, it is possible to efficiently return to the original three-dimensional model.

Exemplary embodiments of a drawing creation program and a drawing creation method according to the present invention will be explained below in detail with reference to the accompanying drawings. In this embodiment, a CAD apparatus in which each function is configured physically independently will be described. However, each function may be implemented by software and implemented as a drawing creation program.

  First, the concept of drawing creation according to the present embodiment will be described. The CAD (Computer Aided Design) apparatus shown in the embodiment investigates whether there are overlapping parts or non-multiple features for a 3D (dimension) model to be created. .

  If there are overlapping parts in the 3D model or if there are non-various features, the 3D model is edited, and a drawing is created based on the edited 3D model.

  FIG. 1 is a functional block diagram illustrating the configuration of the CAD apparatus according to the present embodiment. As shown in the figure, the CAD device 30 is connected to the input device 10 and the display device 20. The input device 10 is a device for inputting information on the cross-sectional shape of a model and information on dimension values necessary for creating a 3D model to the CAD device 30.

  The display device 20 is a device that displays a 3D model created by the CAD device 30 and a drawing for the 3D model.

  The CAD device 30 includes a control unit 40 and a storage unit 90. The control unit 40 includes a modeling kernel unit 50, a shape editing processing unit 60, a coordinate conversion processing unit 70, and a drawing processing unit 80.

  The modeling kernel unit 50 is a processing unit that creates a 3D model, calculates three-dimensional element information, and the like. The modeling kernel unit 50 includes a 3D model creation unit 50a and a 3D element information calculation unit 50b.

  The 3D model creation unit 50a is a processing unit that creates a 3D model based on cross-sectional shape information and dimension value information of the 3D model input from the input device 10.

  The three-dimensional element information calculation unit 50b calculates the depth and overlap of the 3D model based on the shape data of the 3D model edited by the shape editing processing unit 60 described later, and obtains three-dimensional element information. It is. As shown in FIG. 2, this three-dimensional element information includes three-dimensional line type information, start point coordinate information, end point coordinate information, and arbitrary attribute information.

  The shape editing processing unit 60 uses the 3D model shape data created by the modeling kernel unit 50 and the shape editing processing table 90a stored in the storage unit 90 to determine whether or not to edit the 3D model shape data. This is a processing unit that edits shape data when it is determined to edit. The shape editing processing unit 60 includes a 3D model check processing unit 60a and a 3D model editing processing unit 60b.

  The 3D model check processing unit 60a acquires the shape data of the 3D model from the modeling kernel unit 50, and determines whether to edit the 3D model using the acquired shape data and the shape editing processing table 90a.

  Specifically, the 3D model check processing unit 60a sequentially executes the determination method registered in the shape editing processing table 90a on the shape data of the 3D model, and determines whether or not the check content that requires editing is applicable. to decide.

  FIG. 3 shows an example of the shape editing process table 90a. As shown in the figure, the shape editing processing table 90a includes a registration number, a check content, a determination method, and processing information. Here, the registration number is a numerical value for identifying the check content, the determination method, and the processing information.

  The check content is information indicating the state of the 3D model that needs to be edited, and the determination method indicates a method of determining whether the shape data of the 3D model corresponds to the content indicated in the check content. The processing information indicates the content of processing performed on the shape data when it is determined that editing is necessary as a result of performing processing according to the determination method.

  In FIG. 3, the check content of registration No. “1” is “there are overlapping parts”, and the determination method is “when the intersection operation is performed and the executed value is not 0”. Indicates “execution of set operation”. Also, the check content of registration No. “2” is “There is a non-manifold feature”, the determination method is “implementation result of union and response value from Parasolid”, and the processing information is “ The feature is made into parts.

  That is, the 3D model check processing unit 60a sequentially performs the determination method of the shape editing processing table 90a on the shape data of the 3D model. If the shape data corresponds to the check contents, the storage unit 90 stores the shape data, the corresponding registration number, and information indicating that editing is performed as the shape editing data 90b.

  FIG. 4 shows an example of the data structure of the shape edit data 90b. As shown in the figure, the shape editing data 90b has a shape recording area 901, a registration number information recording area 902, and an editing execution information recording area 903. Here, the shape recording area 901 is an area for recording the shape data of the 3D model before editing, and the registration No information recording area 902 is an area for recording a registration No corresponding to the shape data, and includes editing execution information. The recording area is an area for recording information on whether or not to edit the shape data.

  The 3D model editing processing unit 60b is a processing unit that edits shape data when the 3D model check processing unit 60a determines that the shape data of the 3D model needs to be edited.

  The 3D model editing processing unit 60b edits the shape data based on the numerical value recorded in the registration number information recording area 902 and the shape editing processing table 90a. For example, if the numerical value recorded in the registration number information recording area 902 is “1”, the 3D model editing processing unit 60b “performs a set operation” on the shape data, and stores it in the registration number information recording area 902. If the recorded numerical value is “2”, “features are made into parts”.

  Then, the 3D model editing processing unit 60b passes the edited 3D model shape data to the above-described 3D element information calculation unit 50b.

  As described above, the shape editing processing unit 60 determines whether or not the 3D model shape data needs to be edited. When the editing is necessary, the shape editing unit 60 edits the shape data. 3D element information can be obtained.

  The coordinate conversion processing unit 70 receives the three-dimensional element information from the three-dimensional element information calculation unit 50b, and converts the received three-dimensional element information into two-dimensional element information. An example of the data structure of the two-dimensional element information is shown in FIG. As shown in FIG. 5, the two-dimensional element information includes two-dimensional line type information, start point coordinate information, end point coordinate information, and arbitrary attribute information.

  The drawing processing unit 80 acquires the two-dimensional element information from the coordinate conversion processing unit 70, and converts the acquired two-dimensional information into drawing information. In addition, when the shape data of the 3D model is edited, the drawing processing unit 80 replaces the edited shape data of the 3D model with the shape data before editing recorded in the shape recording area 901.

  Then, the drawing processing unit 80 outputs the drawing information and the 3D model shape data to the display device 20, and causes the display device 20 to display the drawing and the 3D model.

  Next, a process in which the CAD device 30 creates a 3D model and a drawing will be described. FIG. 6 is a flowchart showing a processing procedure in which the CAD device 30 creates a 3D model and a drawing.

  As shown in FIG. 6, the modeling kernel unit 50 acquires cross-sectional shape information and dimension value information (step S101), creates a 3D model (step S102), and shapes the 3D model shape data into a shape editing processing unit. 60 (step S103).

  Then, the shape editing processing unit 60 performs shape data check processing (step S104), acquires information on whether or not to edit (step S105), and determines whether editing is necessary (step S106). ).

  If editing is not necessary (step S106, No), the process proceeds to step S111. On the other hand, if editing is necessary (step S106, Yes), the shape data of the 3D model is recorded in the shape storage area 901 (step S107).

  Then, the shape editing processing unit 60 acquires the registration number from the registration number information recording area 902 (step S108), and searches the shape editing processing table 90a for processing information for the shape data based on the registration number (step S109). ), Shape editing processing is performed (step S110).

  Then, the shape editing processing unit 60 passes the shape data to the modeling kernel unit 50 (step S111), calculates 3D element information (step S112), and passes the calculated 3D element information to the coordinate conversion unit 70 (step S112). S113).

  The coordinate conversion unit 70 converts the three-dimensional element information into two-dimensional element information (step S114), passes the converted two-dimensional element information to the drawing processing unit 80 (step S115), and performs post-shape editing processing (step S116). ) The 3D model and the drawing information are output to the display device 20 (step S117).

  Next, the shape data check process shown in step S104 of FIG. 6 will be described. FIG. 7 is a flowchart showing the processing procedure of the shape data check process. As shown in the figure, the number of registration numbers registered in the shape editing process table 90a (R in this embodiment) is substituted for I (step S201), and 1 is substituted for CNT (counter) (step S202). ).

  Then, it is determined whether or not the shape data is registered in the registration No (CNT) (step S203). When the shape data is registered in the registration No (CNT) (step S203, Yes), The fact that editing is necessary is written in the edit execution information recording area 903 (step S204), and the current CNT value is written in the registration number information recording area 902 (step S205).

  On the other hand, when the shape data is not registered in the registration No (CNT) (No in Step S203), it is determined whether or not the value of CNT is equal to the value of I (Step S206), and the value of CNT is determined. However, if it is not equal to the value of I (No at Step S206), 1 is added to the value of CNT (Step S207), and the process proceeds to Step S203. On the other hand, when the value of CNT is equal to the value of I (step S206, YES), the format data check process is terminated.

  As described above, in the shape data check process, whether or not to edit the shape data of the 3D model is sequentially determined using the determination methods registered in the registration Nos. 1 to R of the shape editing process table 90a.

  Next, the shape editing process shown in step S110 of FIG. 6 will be described. Here, the shape editing process when there is an overlap in the shape data will be described. FIG. 8 is a flowchart showing a processing procedure of shape editing processing when there is an overlap in shape data.

  As illustrated in FIG. 8, the 3D model editing processing unit 60 b performs a product set operation on the shape data (step S <b> 301), and each overlapping component data is converted into an overlapping list L [0] to L [N] ( N is registered in the list) (step S302).

  Then, 1 is substituted for the value of i (step S303), and the union operation is performed on the component data registered in the overlap list L [i] with respect to the component data registered in the overlap list L [0]. This is performed (step S304).

  Then, it is determined whether or not the value of i is equal to N (step S305). If the value of i is not equal to N (step S305, No), 1 is added to the value of i (step S306). The process proceeds to step S304.

  On the other hand, when the value of i is equal to N (step S305, Yes), the process proceeds as it is, and the data corresponding to the part data registered in the duplication list L [1] to L [N] is obtained from the shape data. It deletes (step S307) and adds the component data registered in the duplication list L [0] to the shape data (step S308).

  As described above, when there is an overlap in the shape data, the 3D model editing processing unit 60b performs a union operation on each overlapping portion of the shape data, and edits the shape data to obtain an appropriate three-dimensional element. Information can be acquired.

  Although description is omitted, when the non-manifold feature exists in the shape data, the 3D model edit processing unit 60b converts the non-manifold feature existing in the shape data into a part.

  Next, the post-shape editing process shown in step S116 of FIG. 6 will be described. FIG. 9 is a flowchart showing a processing procedure of post-shape editing processing.

  As shown in FIG. 9, the drawing processing unit 80 determines whether or not shape editing processing has been performed (step S401). If the shape editing processing has not been performed (step S401, No), the shape editing processing is performed. finish.

  On the other hand, when the shape editing process is performed (step S401, Yes), the shape data before editing is acquired from the shape recording area 901 (step S402), and the edited shape data is replaced with the shape data before editing (step S402). Step S403).

  As described above, in this embodiment, the 3D model check processing unit 60a determines whether or not to edit the shape data based on the shape data of the 3D model and the shape editing processing table 90a. When the determination is made, the 3D model editing processing unit 60b edits the shape data based on the processing information registered in the shape editing processing table 90a, and creates a drawing based on the edited shape data. Accurate element information can be obtained from features that are formed only when combined with parts, and a drawing required by the designer can be created.

  In the present embodiment, the 3D model editing processing unit 60b replaces the edited 3D model shape data with the unedited 3D model shape data recorded in the storage unit 90, thereby obtaining the original 3D model shape data. However, the shape data of the edited 3D model may be deleted, and the shape data recorded in the storage unit may be output to the display device 20.

  In this case, the work of replacing the edited shape data with the edited shape data is eliminated, and the shape data before editing may be output to the display device 10 as it is, so the burden on the CAD device 30 can be reduced.

  In the present embodiment, the CAD apparatus has been described. However, a drawing creation program having the same function can be obtained by realizing the configuration having the CAD apparatus by software. A computer system that executes this drawing creation program will be described.

  FIG. 10 is a diagram illustrating a computer system that executes a drawing creation program according to the present embodiment. As shown in FIG. 1, the computer system 100 includes a main body 101, a display 102 that displays information on a display screen 102 a according to an instruction from the main body 101, and various information input to the computer system 100. A keyboard 103, a mouse 104 for designating an arbitrary position on the display screen 102a of the display 102, a LAN interface connected to a LAN 106 or a wide area network (WAN), and a modem 105 connected to a public line 107 are included. Here, the LAN 106 connects the computer system 100 to another computer system (PC) 111, a server 112, a printer 113, and the like.

  FIG. 11 is a functional block diagram showing the configuration of the main body 101 shown in FIG. As shown in the figure, the main body 101 includes a CPU 121, a RAM 122, a ROM 123, a hard disk drive (HDD) 124, a CD-ROM drive 125, an FD drive 126, an I / O interface 127, and a LAN. Interface 128.

  A drawing creation program executed in the computer system 100 is stored in a portable storage medium such as a floppy disk (FD) 108, a CD-ROM 109, a DVD disk, a magneto-optical disk, an IC card, and the like. It is read and installed in the computer system 100. The installed moving image distribution program is stored in the HDD 124 and executed by the CPU 121 using the RAM 122, the ROM 123, and the like.

(Supplementary Note 1) A drawing creation program for obtaining element information from a three-dimensional model using a modeling kernel and creating a drawing for the three-dimensional model based on the obtained element information,
A determination procedure for determining whether or not to edit the three-dimensional model based on the determination information including information on the characteristics of the three-dimensional model that requires editing;
When the determination procedure determines that the three-dimensional model is to be edited, the three-dimensional model is edited based on processing information including an editing method for the three-dimensional model, and the modeling kernel is used. An editing process procedure for acquiring element information from the edited three-dimensional model;
A drawing creation program for causing a computer to execute.

(Supplementary note 2) The processing information includes an editing method according to the feature of the three-dimensional model that requires the editing, and the editing processing procedure is based on the processing information to the feature of the three-dimensional model. The drawing creation program according to appendix 1, wherein the three-dimensional model is edited by a corresponding editing method, and element information is acquired from the edited three-dimensional model using the modeling kernel.

(Supplementary note 3) The drawing creation according to supplementary note 1, wherein the determination procedure determines that the three-dimensional model is to be edited when there is a portion that overlaps each component constituting the three-dimensional model. program.

(Additional remark 4) The said determination procedure edits with respect to the said three-dimensional model, when the set operation procedure which implements a product set operation with respect to the said three-dimensional model and the calculation result by the said set arithmetic procedure is not zero The drawing creation program according to appendix 1, further comprising: causing the computer to execute a determination procedure for determining the above.

(Additional remark 5) The said edit process procedure performs union operation with respect to the part which has overlapped each component which comprises the said three-dimensional model, when the said judgment procedure judges that the said three-dimensional model is edited. The drawing creation program according to supplementary note 3 or 4, which is characterized.

(Supplementary Note 6) A storage procedure for storing the three-dimensional model before editing in the storage unit, and after obtaining element information from the edited three-dimensional model in the editing processing procedure, the edited three-dimensional model is stored in the storage unit. The drawing creation program according to appendix 1, further causing a computer to execute a change procedure for changing to a three-dimensional model before editing stored in a section.

(Supplementary note 7) A drawing creation method for obtaining element information from a three-dimensional model using a modeling kernel and creating a drawing for the three-dimensional model based on the obtained element information,
A determination step of determining whether or not to edit the three-dimensional model based on the determination information including information on the characteristics of the three-dimensional model that requires editing;
When the determination step determines that the three-dimensional model is to be edited, the three-dimensional model is edited based on processing information including an editing method for the three-dimensional model, and the modeling kernel is used. An editing process step of acquiring element information from the edited three-dimensional model;
A method for creating a drawing, comprising:

As described above, the drawing creation program and the drawing creation method according to the present invention are effective for a drawing creation program that needs to create an appropriate drawing even for a 3D model having a complicated shape. .

It is a functional block diagram which shows the structure of the CAD apparatus concerning a present Example. It is a figure which shows an example of the data structure of three-dimensional element information. It is a figure which shows an example of a shape edit process table. It is a figure which shows an example of the data structure of shape edit data. It is a figure which shows an example of the data structure of two-dimensional element information. It is a flowchart which shows the process sequence which the CAD apparatus 30 produces 3D model and drawing. It is a flowchart which shows the process sequence of a shape data check process. It is a flowchart which shows the process sequence of a shape edit process when there exists overlap in shape data. It is a flowchart which shows the process sequence of a shape edit post-process. It is a figure which shows the computer system which performs the drawing creation program which concerns on a present Example. It is a functional block diagram which shows the structure of the main-body part 101 shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Input device 20 Display apparatus 30 CAD apparatus 40 Control part 50 Modeling kernel part 50a 3D model creation part 50b 3D element information calculation part 60 Shape edit process part 60a 3D model check process part 60b 3D model edit process part 70 Coordinate conversion process part 80 drawing processing unit 90 storage unit 90a shape editing processing table 90b shape editing data

Claims (5)

A drawing creation program that obtains element information from a three-dimensional model using a modeling kernel and creates a drawing for the three-dimensional model based on the obtained element information,
A storage procedure for storing shape data constituting the three-dimensional model before editing in a storage unit;
A determination procedure for determining whether or not there is a portion overlapping the shape data constituting the three-dimensional model;
Edit that performs union operation on the shape data with the overlapping part and edits it into one shape data when it is determined by the determination procedure that there is an overlapping part with the shape data constituting the three-dimensional model Processing procedure and
After obtaining element information from the shape data constituting the three-dimensional model edited in the editing processing procedure, the edited three-dimensional model is converted into shape data constituting the three-dimensional model before editing stored in the storage unit. Change procedure to change,
A drawing creation program for causing a computer to execute.   In the determination procedure, when a product set operation is performed on the shape data constituting the three-dimensional model, and the product set operation result is not zero, a portion overlapping the shape data constituting the three-dimensional model is The drawing creation program according to claim 1, wherein the drawing creation program determines that it exists. The determination procedure further determines whether or not a non-manifold feature exists in the shape data constituting the three-dimensional model,
The edit processing procedure further converts the non-manifold feature into a part when it is determined by the determination procedure that a non-manifold feature exists in the shape data constituting the three-dimensional model. The drawing creation program described. A drawing creation method in which a computer creates a drawing based on shape data constituting a three-dimensional model,
Performing a set operation on the shape data constituting the three-dimensional model,
When the intersection operation result is not zero, it is determined that there is a portion overlapping the shape data constituting the three-dimensional model,
Perform a union operation on the shape data constituting the three-dimensional model determined that the overlapping portion exists, and edit it into one shape data,
A drawing creation method, wherein element information is acquired from shape data constituting the edited three-dimensional model, and a drawing for the three-dimensional model is created based on the acquired element information. The computer further includes:
Determining whether non-manifold features exist in the shape data constituting the three-dimensional model;
When it is determined that a non-manifold feature exists in the shape data constituting the three-dimensional model, a second editing for converting the non-manifold feature into a part is performed,
When creating the drawing, element information is acquired from the shape data constituting the three-dimensional model after the editing and the second editing, and a drawing for the three-dimensional model is obtained based on the acquired element information. The drawing creation method according to claim 4 .

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