JP2020144759A - Dimension generation device, dimension generation method and program - Google Patents

Abstract

To provide a dimension generation device capable of generating dimensions of a 3D model with no duplication with respect to a 3D model while properly associating the dimensions with the elements of the target 3D model, and a dimension generation method or a program.SOLUTION: A model element detection unit 122 detects planes, ridges, and vertices included in each plane, which are elements of a 3D model and detects a shape, position, and/or posture of each element. A dimension generation determination unit 123 determines whether to generate dimensions for each detected element, and other elements to be associated with the dimensions. A dimension generation unit 124 generates dimensions for each element determined that generation of the dimensions is required by the dimension generation determination unit 123 and generates a piece of information of the dimension element indicating the element associated with the dimension.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dimension generator, a dimension generator and a program for generating dimensions of a three-dimensional model.

In the manufacturing process of a product, design, production or measurement is performed using a three-dimensional model of the product generated by a 3D-CAD (3 Dimensional Computer Aided Design) device. Some 3D-CAD devices are equipped with a function of adding dimensions to a 3D model in a 3D space.

The dimensions attached to the 3D model are the dimensions generated by selecting one or more elements of the 3D model, for example, the linear dimensions between the planes generated by selecting two planes. ..

The dimensional information added to the three-dimensional model is read by software including CAM (Computer Aided Manufacturing) or CAT (Computer Aided Testing) and used for automatic creation of a machining program or a measurement program. For example, it is possible to automate the creation of a measurement program in a CNC (Computer Numeric Control) coordinate measuring machine. Specifically, it is possible to recognize two surfaces associated with the dimensions from the dimensions added to the three-dimensional model and automate the generation of the operation path of the measuring machine that measures each surface in three dimensions. .. In addition, it is possible to automate the creation of a program that compares and collates the measurement result of the three-dimensional measurement with the value of the dimension.

The dimensional information attached to the 3D model needs to be correctly and efficiently readable by software including CAM or CAT. In order for software to read information accurately, it is required that the dimensions added to the 3D model are correctly associated with one or more elements of the target 3D model. The elements of the 3D model include vertices, ridges, faces, and the central axis of the cylinder.

On the other hand, regarding the dimensions added to the three-dimensional model, it is required to display the annotation (Annotation) of the model so that the worker in the subsequent process can correctly read the information. Therefore, the dimensions given to the three-dimensional model are required to be generated without duplication.

Conventionally, there is a technique for automatically generating dimensions without duplication in a two-dimensional drawing created from a three-dimensional model (for example, Patent Document 1). The CAD device described in Patent Document 1 creates a two-dimensional flat figure on one or more two-dimensional planes based on the three-dimensional method from a three-dimensional solid figure, and obtains horizontal dimensions and vertical dimensions on the two-dimensional plane figure. Generate. If the values of one coordinate point of a plurality of horizontal dimensions and the value of the other coordinate point with respect to the horizontal axis in the two-dimensional flat figure are common among the plurality of horizontal dimensions, only one of the plurality of horizontal dimensions is used. To generate. Similarly, if the values of one coordinate point of the plurality of vertical dimensions and the value of the other coordinate point with respect to the vertical axis in the two-dimensional flat figure are common among the plurality of vertical dimensions, one of the plurality of vertical dimensions is used. Generate only one. It is explained that this makes it possible to add dimensional information without overlapping horizontal dimensions and vertical dimensions.

Japanese Unexamined Patent Publication No. 2006-106938

The technique described in Patent Document 1 automatically generates dimensions for a two-dimensional flat figure created from a three-dimensional solid figure so as not to overlap within one plan view and between a plurality of plan views. That is. However, the method of Patent Document 1 cannot add dimensions to a three-dimensional model generated in a three-dimensional space.

Further, the overlap of dimensions is determined based on the coordinates of the vertices of the two-dimensional flat figure, and the elements including the plane, the ridge line, the cylindrical surface, or the central axis of the cylinder of the three-dimensional model are not recognized. Therefore, there is a problem that the dimensions cannot be correctly associated with the elements of the target three-dimensional model, and the dimensional information cannot be read correctly by software including CAM or CAT.

For example, if the vertical dimensions of the ridgeline and the reference bottom surface are related and the vertical dimensions of the plane including the ridgeline and the reference bottom surface are not related, a machining or measurement program for the plane is not created. It was. Also, if there are multiple planes with the same vertical dimensions as the reference bottom surface and only some of the planes are associated with the dimensions, no machining or measurement program was created for the unrelated planes. ..

The present invention has been made in view of the above circumstances, and it is possible to generate dimensions without duplication for a three-dimensional model and correctly associate the dimensions with the elements of the target three-dimensional model. It is an object of the present invention to provide a dimensional generation device, a dimensional generation method or a program.

In order to achieve the above object, the dimension generator of the present invention includes a model element detection unit for detecting the shape, position or orientation of an element including at least a part of a surface, a ridge line and a vertex of a three-dimensional model, and a model element detection unit. Based on the shape, position or orientation of the element detected by, the generation dimension determination unit that determines the necessity of generating the dimensions associated with each of the elements and the other elements associated with the dimensions, and the generation dimension determination unit generate the generation. It is characterized by including a dimension determined to be necessary and a dimension generation unit that generates dimension element information indicating an element associated with the dimension.

According to the present invention, in order to determine the necessity of generating dimensions for each of the elements of the 3D model and also to determine other elements associated with the dimensions, the dimensions are generated without duplication for the 3D model. It is possible to correctly associate the dimensions with the elements of the target 3D model.

A block diagram showing a configuration example of a dimension generator according to an embodiment of the present invention. A flowchart showing a dimension generation process according to the first embodiment of the present invention. Flowchart showing reference coordinate system determination process Flowchart showing plane dimension generation processing Flowchart showing ridge dimension generation processing Flowchart showing orthogonal ridge dimension generation processing Flowchart showing vertex dimension generation processing Flow chart showing dimension generation processing according to Embodiment 2 of the present invention Flowchart showing cylindrical surface dimension generation processing Flowchart showing central axis dimension generation processing Flowchart showing vertex dimension generation processing Diagram showing an example of a 3D model A table showing the correspondence between the surface of the 3D model, the number, and the reference element surface. Diagram showing an example of a 3D model A table showing the correspondence between the ridgeline on the right side and the number Figure with dimensions added to the 3D model A table showing the elements associated with the dimensions Diagram showing the positions of the vertices of the 3D model Figure with dimensions added to the 3D model A table showing the elements associated with each dimension Figure with dimensions added to the 3D model A table showing the elements associated with each dimension The figure which showed the display example of the part where the dimension cannot be generated automatically

(Embodiment 1)
Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of the dimension generation device 1 according to the first embodiment of the present invention. The dimension generation device 1 is a device that selects one or a plurality of elements with respect to a three-dimensional model and generates dimensions associated with these elements. The three-dimensional model is, for example, a model generated by a 3D-CAD apparatus and three-dimensionally displaying the three-dimensional shape, position, and posture of an object. The dimension generation device 1 may be a device that generates and adds dimensions to a three-dimensional model created by the 3D-CAD device, or may be a part of a 3D-CAD device having a dimension generation function.

The dimension generation device 1 has a storage unit 110 in which data of the three-dimensional model is stored, a calculation unit 120 that executes a process of generating dimensions associated with one or more elements of the three-dimensional model, and an operator. It includes an input unit 130 for input and an output unit 140 for outputting information of a three-dimensional model including dimensions.

The data of the three-dimensional model stored in the storage unit 110 indicates the three-dimensional shape, position, and orientation of the object, and is associated with each element included in the three-dimensional model. The elements included in the 3D model are, for example, vertices, ridges, faces, and the central axis of the cylinder. The storage unit 110 also stores a program executed by the calculation unit 120.

The arithmetic unit 120 is an arithmetic processing unit that executes a program stored in the storage unit 110, and is, for example, a CPU (Central Processing Unit). The calculation unit 120 detects the reference coordinate system determination unit 121 that determines the coordinate system that is the reference for dimension generation, the model element detection unit 122 that detects the model element to which the generated dimension is associated, and the detection unit 120 by executing the program. It functions as a generation dimension determination unit 123 that determines whether or not to generate dimensions for the model element, and a dimension generation unit 124 that generates the dimensions determined to be generated and outputs information with dimensions added to the three-dimensional model. To do.

The reference coordinate system determination unit 121 determines a three-dimensional reference coordinate system based on the input to the input unit 130 of the operator, and is a reference element that serves as a reference when generating dimensions in the direction of each coordinate axis of the reference coordinate system. To determine. In this embodiment, a Cartesian coordinate system having an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other is determined. Further, the reference coordinate system determination unit 121 outputs the determined reference coordinate system and identification information of the reference element to the generation dimension determination unit 123.

The model element detection unit 122 sequentially detects elements from the three-dimensional model stored in the storage unit 110. For example, the model element detection unit 122 detects all the faces of the three-dimensional model, assigns numbers, and then assigns numbers to the faces, the ridges included in each face, the shape, position, and the shape and position of the element including at least a part of the vertices. The posture is detected and output to the generated dimension determination unit 123.

The generation dimension determination unit 123 associates the reference coordinate system and the reference element determined by the reference coordinate system determination unit 121 with each element based on the shape, position, or orientation of the element detected by the model element detection unit 122. Judge the necessity of generation of. For example, when the element detected by the model element detection unit 122 is not the reference element itself or a part thereof, which is the reference for dimension generation, but is orthogonal to any of the coordinate axes of the reference coordinate system, and the same dimension is not generated. In addition, it is determined that the generation of dimensions is necessary. Then, other elements associated with the generated dimensions are determined. On the other hand, the element detected by the model element detection unit 122 is the reference element itself or a part thereof which is the reference for dimension generation, is not orthogonal to any coordinate axis of the reference coordinate system, or the same dimension has already been generated. If so, it is determined that the generation of dimensions is not necessary.

The dimension generation unit 124 generates dimension element information indicating the dimension and the element related to the dimension for the element determined by the generation dimension determination unit 123 that the dimension needs to be generated, and stores the dimension element information in the storage unit 110. Further, the dimension generation unit 124 performs a process of adding the dimension to the three-dimensional model, and outputs the data or the dimension element information of the three-dimensional model to which the dimension is added to the output unit 140.

The input unit 130 is an arbitrary device for inputting information, for example, a keyboard or a pointing device including a mouse and a touch panel. Information necessary for processing of the calculation unit 120 is input to the input unit 130 by the operator. For example, the operator selects three elements orthogonal to each other, which are required when determining the reference coordinate system and the reference elements of each coordinate axis, and inputs them to the input unit 130. The information input to the input unit 130 is output to the reference coordinate system determination unit 121 of the calculation unit 120.

The output unit 140 includes a display for displaying image or character information. The output unit 140 displays the three-dimensional model with the added dimensions on the display. Further, the output unit 140 may display a table in which the dimensions and the dimensional element information associated with the dimensions are arranged on the display.

The operation of the dimension generation device 1 configured as described above will be described with reference to the flowchart shown in FIG. FIG. 2 is a flowchart showing a dimension generation process. At the time of starting the dimension generation process, the data of the three-dimensional model for which the dimension is to be generated is stored in the storage unit 110.

First, the model element detection unit 122 of the calculation unit 120 assigns numbers to all the surfaces of the three-dimensional model (step S201). At this time, the maximum value of the assigned surface number is n. In the present embodiment, a case where all the planes to which the numbers are assigned are flat surfaces will be described.

Next, when the operator selects three orthogonal elements that serve as reference for dimension generation from the elements of the three-dimensional model and inputs them to the input unit 130, the reference coordinate system determination unit is based on the input. A reference coordinate system in which 121 is orthogonal to each other and a reference element in each coordinate axis direction are determined (step S202).

The reference coordinate system determination process in step S202 will be described in detail with reference to the flowchart of FIG. First, the operator assumes one Cartesian coordinate system on the three-dimensional model, selects three elements orthogonal to each coordinate axis, and inputs them to the input unit 130. Selectable elements are a plane orthogonal to each coordinate axis, a straight ridge, and a central axis of the cylinder. Based on the input of the operator, the reference coordinate system determination unit 121 determines the reference coordinate system (step S301). The reference coordinate system may be selected from preset orthogonal coordinate systems, or the arithmetic unit 120 may newly create an orthogonal coordinate system.

Next, the reference coordinate system determination unit 121 determines a reference element that serves as a reference when generating dimensions in the X-axis direction of the reference coordinate system determined in step S301 (step S302). The reference element is an element orthogonal to the X-axis, for example, a plane orthogonal to the X-axis, a straight ridge, or a central axis of a cylinder. Here, the reference coordinate system determination unit 121 may determine the reference element according to a predetermined priority order, or may prompt the operator to input the selection of the reference element and determine based on the input of the operator.

Similarly, the reference coordinate system determination unit 121 determines a reference element as a reference when generating the dimension in the Y-axis direction (step S303), and determines the reference element as a reference when generating the dimension in the Z-axis direction. After making a determination (step S304), the reference coordinate system determination process ends.

In the present embodiment, the reference element in the X-axis direction is the reference element surface Ex which is a plane, the reference element in the Y-axis direction is the reference element surface Ey which is a plane, and the reference element in the Z-axis direction is a plane. A case where the reference element plane Ez is used will be described.

In the flowchart of FIG. 2, 0 is assigned to the variable P after the reference coordinate system determination process in step S202 (step S203). Here, P is an integer of 0 or more. Next, 1 is added to the variable P (step S204). After that, the generation dimension determination unit 123 determines whether or not the surface of the number P is the surface designated as the reference element surface in step S202 (step S205). Hereinafter, representative of the surface numbers for P and _{E P.}

In step S205, the process proceeds to S207 if the plane _{E P} in number P is the reference element plane. Surface E _P number P is the case not the reference element plane executes a planar dimension generation process (step S206). After the plane dimension generation process is completed, it is determined whether or not the value of the variable P is smaller than the maximum value n of the surface numbers (step S207). When the variable P is smaller than n (step S207: Yes), the process returns to S204 because there is a surface that has not been processed yet. When the variable P is n or more (step S207: No), the processes of steps S205 and S206 are executed for all the numbered surfaces, so that the process of this flow ends.

The plane dimension generation process executed in step S206 will be described in detail. FIG. 4 is a flowchart showing the plane dimension generation process.

First, generation size determination unit 123, X-axis plane _{E P} of the reference coordinate system number P, Y-axis, determines whether or not orthogonal to one of the Z-axis (step S401). If none of the axes are orthogonal to each other (step S401: No), the process proceeds to step S403.

Surface _{E P} is X-axis, Y-axis, if the perpendicular to one of the Z-axis (step S401: Yes), the shaft axis A which is perpendicular to the _{E P,} the reference element plane of the axis A perpendicular to Ea (step S402). That is, the axis A X-axis, Y-axis, an axis orthogonal to the _{E P} of the Z-axis, Ea is Ex, Ey, of Ez, a reference element plane of the axis A.

Generating dimension determination unit 123, already in the generated dimensions determines whether there is a linear distance and dimensions of the same direction of the axis A from Ea to E _P (step S404). If there is no dimension of the same length (step S404: No), the size generating unit 124 generates a size of the linear distance in the direction of axis A associated with plane _{E P} reference element plane Ea and number P (step S405), The processing of this flow ends.

Generating dimension determination unit 123, if there is a dimension Seeded same distance (step S404: Yes), to add _{E P} to the set Et elements associated with that dimension Dt (step S406). Next, it is determined whether contains ridge or vertex constituting the surface of the E _P in the set Et elements (step S407). If it is not included (step S407: No), the process of this flow ends. If it is included (step S407: Yes), the ridgeline or vertex is excluded from the set Et associated with the dimension Dt (step S408), and the processing of this flow ends. Thus, after adding E _P to the set Et, to exclude the ridge or apex which is a component of the E _P, it is possible to avoid duplication of association.

In step S401, X-axis plane _{E P} of the reference coordinate system number P, Y-axis, if that is not orthogonal to any axis of the Z-axis (Step S401: No), the ridge is a component of the surface of the _{E P} After executing the ridge line dimension generation process for generating the dimensions (step S403), the process of this flow ends.

The ridge line dimension generation process executed in step S403 will be described in detail. FIG. 5 is a flowchart showing the ridge line dimension generation process.

First, the model element detection unit 122 assigns a number from 1 to one or more ridge lines configuring the surface of the _{E P} sequentially (step S501). Let m be the maximum value of the assigned number. Hereinafter, representative of the ridge numbers Q constituting the surface _{E P} in number P and _{L PQ.} Next, 0 is assigned to the variable Q (step S502). Next, 1 is added to the variable Q (step S503).

Next, the generation dimension determination unit 123 determines whether or not the ridge line L _PQ is orthogonal to any two axes of the X axis, the Y axis, and the Z axis (step S504). If they are not orthogonal to each other (step S504: No), the process proceeds to step S505. When the ridge line L _PQ is orthogonal to any two axes of the X axis, the Y axis, and the Z axis (step S504: Yes), the two orthogonal axes are set to the axis Aw, and the reference element plane of the axis Aw is set to Eaw. (Step S506). Here, w is an integer of 0 or more. In other words, the axis Aw is X-axis, Y-axis, a two axes orthogonal to the ridge line _{L PQ} of Z-axis, EAW is Ex, Ey, of Ez, two axes Aw respective reference perpendicular to the ridge line _{L PQ} It is an element surface.

Next, 0 is assigned to the variable w (step S507), and 1 is added to the variable w (step S508). Then, the variable w at that time, to perform the orthogonal ridge dimensions generating process for generating a dimension in the direction of the ridge line _{L PQ} axis Aw orthogonal to the ridge line _{L PQ} (step S509). After that, when the value of the variable w is smaller than 2 (step S510: Yes), the dimension in the axis A2 direction has not been processed, so the process returns to step S508. When the variable w is 2 or more (step S510: No), the process proceeds to step S514.

In step S504, the ridge line L _PQ is not orthogonal to any two axes of the X axis, the Y axis, and the Z axis (step S504: No), but the ridge line L _PQ is any one of the X axis, the Y axis, and the Z axis. When orthogonal to the axis (step S505: Yes), one orthogonal axis is defined as the axis Aw, and the reference element plane of the axis Aw is defined as Eaw (step S511). Here, w is 1. That is, the axis Aw is one of the X-axis, the Y-axis, and the Z-axis that is orthogonal to the ridge line L _PQ , and Eaw is a reference element of one of the Ex, Ey, and Ez axes that is orthogonal to the ridge line L _PQ. It is a face.

Then, run the orthogonal ridge dimensions generating process for generating a dimension in the direction of the ridge line _{L PQ} axis Aw orthogonal to the ridge line _{L PQ} (step S512). After that, the process proceeds to step S513. Further, in step S505, when the ridge line L _PQ is not orthogonal to any of the X-axis, Y-axis, and Z-axis (step S505: No), the process proceeds to step S513. In step S513, a vertex dimension generation process for generating the dimensions between the vertices that are the start and end points of the ridge line L _PQ and the reference element surface is executed (step S513).

In the next step S514, it is determined whether or not the variable Q is smaller than m. If it is smaller than m (step S514: Yes), there is a ridgeline for which the dimension generation process has not been executed yet, so the process returns to step S503. If the variable Q is equal to or greater than m (step S514: No), it ends the processing of this flow for dimension generation process for all ridge constituting a plane E _P is completed.

In the flowchart of FIG. 5, the orthogonal ridge dimension generation process executed in steps S509 and S512 and the vertex dimension generation process executed in step S513 will be described in detail with reference to the flowcharts of FIGS. 6 and 7. FIG. 6 is a flowchart showing the orthogonal ridge line dimension generation process, and FIG. 7 is a flowchart showing the vertex dimension generation process.

In the orthogonal ridgeline dimension generation process shown in FIG. 6, first, whether or not the generation dimension determination unit 123 includes the ridgeline L _PQ as a component of the reference element surface Eaw of the axis Aw orthogonal to the Qth ridge line L _PQ. (Step S601). When the ridge line L _PQ is included in the component of the reference element surface Eaw (step S601: Yes), it is not necessary to generate the dimensions, so the process of this flow ends.

When the ridge line L _PQ is not a component of the reference element surface Eaw (step S601: No), it is the same as the linear distance in the axis Aw direction from the reference element surface Eaw to the ridge line L _{PQ in} the already generated dimensions. The generation dimension determination unit 123 determines whether or not there is a dimension (step S602). When there is no generated dimension of the same distance (step S602: No), the dimension generation unit 124 generates a linear dimension in the axis Aw direction associated with the reference element surface Eaw and the ridge line L _PQ (step S603). End the flow processing.

When there is one or more dimensions that are the same as the linear distance in the axis Aw direction from the reference element surface Eaw to the ridge line L _PQ (step S602: Yes), the dimension is Dt, and the set of elements related to the dimension is set. When it is set to Et, the generation dimension determination unit 123 determines whether the _LPQ itself is included in the set Et (step S604). If _LPQ itself is included in the set Et (step S604: Yes), the processing of this flow ends.

Whether or not the generation dimension determination unit 123 does not include the _LPQ itself in the set Et (step S604: No) and includes a surface having the _LPQ as a component in the set Et. (Step S605). If it is included (step S605: Yes), the processing of this flow ends.

If the set Et does not include a surface having L _PQ as a component (step S605: No), the L _PQ is additionally associated with the set Et of the elements associated with the dimension Dt (step S606). Then, in the set Et, if it contains a vertex is the starting point or the end point of L _PQ (step S607: Yes), by excluding the vertex of the object from the set Et elements associated with dimension Dt (step S608), the processing of this flow is completed. As a result, after adding the L _PQ to the set Et, the start point or the end point which is a component of the L _PQ is excluded, so that the duplication of association can be avoided. In the set _Et, does not contain the vertex of the start point or end point of _{L PQ} (step S607: No) terminates the process.

In the vertex dimension generation process shown in FIG. 7, first, the vertices of the start point and the end point of the ridge line L _PQ are set to _OPQ1 and _OPQ2 , respectively (step S701). Next, 0 is assigned to the variables U and V (step S702). Next, 1 is added to the variable U (step S703), and 1 is added to the variable V (step S704).

Next, when the variable V is 1, the axis A is the X axis and the reference element surface Ea of the axis A is the Ex. When the variable V is 2, the axis A is the Y axis and the reference element surface Ea of the axis A is Ey. When the variable V is 3, the axis A is the Z axis and the reference element surface Ea of the axis A is Ez (step S705).

Next, the generation dimension determination unit 123 determines whether the vertex _OPQU for the variable U is a component of Ea, and if it is a component (step S706: Yes), the vertex dimension is not generated and the step S712 is performed. move on. On the other hand, when the vertex _OPQU is not a component of Ea (step S706: No), there is the same dimension as the linear distance in the axis A direction from the reference element surface Ea to the vertex _OPQU among the already generated dimensions. Whether or not it is determined (step S707).

When there is no dimension of the same distance (step S707: No), the dimension generation unit 124 newly generates a linear dimension in the axis A direction associated with the reference element surface Ea and the vertex _OPQU (step S708). If it is determined in step S707 that there are already generated dimensions of the same distance (step S707: Yes), the process proceeds to step S709.

When the generated dimension of the same distance is Dt and the set of elements associated with the dimension is Et, and the _OPQU itself is included in the set Et (step S709: Yes), step S712 Proceed to. On the other hand, when the _OPQU is not included in the set Et (step S709: No), the generation dimension determination unit 123 sets the _OPQU as a component in the set Et of the elements associated with the dimension Dt. It is determined whether or not the surface or ridge line to be included is included (step S710).

If the set Et does not include a surface or ridge line having an _OPQU as a component (step S710: No), the _OPQU is added to the set Et of the elements associated with Dt (step S711). If the set Et includes a surface or a ridge line having _OPQU as a component (step S710: Yes), the process proceeds to step S712 as it is.

In step S712, when the value of the variable V is smaller than 3 (step S712: Yes), there is an axial direction that has not been processed yet, so the process returns to S704. When the variable V is 3 or more (step S712: No), the process of dimensional generation is completed in all three axial directions of the X-axis, the Y-axis, and the Z-axis, so the process proceeds to S713.

If the value of the variable U is smaller than 2 in step S713 (step S713: Yes), the process returns to S703 because the vertices of the start point or the end point have not been processed. When the variable U is 2 or more, the processing of this flow is terminated because the processing of dimension generation has been completed for the vertices of the start point and the end point.

In this way, by executing the dimension generation processing shown in the flowcharts of FIGS. 2 to 7, the dimensions of all the surfaces of the three-dimensional model, the ridge lines that are the components of each surface, and the reference element surfaces of the vertices are duplicated. Can be generated in association with an element.

The dimension generation unit 124 stores the three-dimensional model data to which the generated dimensions are added and the dimension element information associated with the dimensions in the storage unit 110 and outputs the data to the output unit 140. The output unit 140 displays the three-dimensional model with the added dimensions on the display. Further, the output unit 140 may display a table in which the dimensions and the dimensional element information associated with the dimensions are arranged on the display.

As described above, in the dimension generation device 1 according to the present embodiment, the model element detection unit 122 detects the surface which is an element of the three-dimensional model and the ridges and vertices included in each surface, and the generation dimension determination unit 123. Determines the necessity of generating the dimensions of each detected element. In the generation dimension determination unit 123, each detected element is not a reference element plane or a component thereof which is a reference for dimension generation, but each element is orthogonal to the coordinate axis of the reference coordinate system and dimensions of the same distance are generated. If not, it is determined that the dimensions need to be generated. Then, the dimension generation unit 124 generates the dimensions of the elements determined by the generation dimension determination unit 123 that the dimensions need to be generated, and adds the elements to the three-dimensional model. This makes it possible to generate dimensions without duplication for the 3D model and correctly associate each element of the 3D model with the dimensions.

(Embodiment 2)
Hereinafter, Embodiment 2 of the present invention will be described in detail with reference to the drawings. The configuration of the dimension generation device 1 is the same as that of the first embodiment, but the dimension generation process executed by the calculation unit 120 is partially different from that of the first embodiment. The dimension generation process according to the present embodiment will be described in detail.

FIG. 8 is a flowchart of the dimension generation process according to the present embodiment. Similar to the first embodiment, at the time when the dimension generation process is started, the data of the three-dimensional model for which the dimension is to be generated is stored in the storage unit 110.

In the dimension generation process shown in FIG. 8, the processes of steps S801 to S805 are the same as the steps S201 to S205 of the dimension generation process according to the first embodiment shown in FIG. In step S801, the surface to which the model element detection unit 122 assigns a number includes a flat surface, a cylindrical surface, and other curved surfaces.

In step S805, the process proceeds to S811 if the plane _{E P} in number P is the reference element plane. Generating dimension determination unit 123, the number P of the plane _{E P} if is not a reference element plane (Step S805: No), the surface _{E P} is determined whether the plane (step S806), if _{E P} is plane (Step S806: Yes), the plane dimension generation process is executed (step S807). The plane dimension generation process is the process shown in FIG. 4 similar to the first embodiment.

Generating dimension determination unit 123, when _{E P} is not a plane (step S806: No), _{E P} determines whether a part of a cylindrical surface or a cylindrical surface (step S808). If E _P was part of a cylindrical surface or a cylindrical surface (step S808: Yes), executes the cylindrical surface dimension generation process of generating the dimensions of the cylindrical surface (step S809).

Generating dimension determination unit 123, if the _{E P} was not part of a cylindrical surface or a cylindrical surface (step S808: No), _{E P} is determined to be a face of a subject outside dimensions automatic generation, storage unit 110 The surface number P is stored in (step 810). After that, if the variable P is smaller than the maximum value n of the surface numbers (step S811: Yes), the process returns to step S804 because there are still unprocessed surfaces. On the other hand, when the variable P is n or more, the process of dimensional generation is completed for all the surfaces, so the process proceeds to step S812.

In step S812, the dimension generation unit 124 displays an element for which the dimension could not be automatically generated on the screen (step S812), prompts the operator to manually generate the dimension, and based on the operator's input, the location where the dimension cannot be automatically generated. Is generated and output to the output unit 140. After that, the processing of this flow ends.

The details of the cylindrical surface dimension generation process in step S809 will be described. FIG. 9 is a flowchart showing a cylindrical surface dimension generation process.

First, it is determined generation size determination unit 123, whether the angle of the cylindrical surface of the _{E P} is 180 ° or more (step S901). Dimensions generator 124, if more than 180 ° (step S901: Yes), generates a diameter of the cylindrical surface _{E P} (step S902), if less than 180 ° (step S901: No), the cylindrical surfaces _{E P} Generate a radial dimension (step S903).

Next, generation size determination unit 123, the central axis C _P is X-axis of a cylinder having a cylindrical surface E _P, Y-axis, to determine whether orthogonal to either two axes of Z-axis (Step S904) If they are not orthogonal to each other, the process proceeds to step S905 (step S904: No). The central axis _{C P} is X-axis, Y-axis, if that is perpendicular to any two of the axes of Z-axis (step S904: Yes), the two axes orthogonal to the axis Aw, and Eaw the reference element plane axis Aw (Step S906). Here, w is an integer of 0 or more. In other words, the axis Aw is X-axis, Y-axis, a two axes perpendicular to the central axis _{C P} of the Z-axis, EAW is Ex, Ey, of Ez, two axes Aw each perpendicular to the central axis _{C P} It is a reference element surface of.

Next, 0 is assigned to the variable w (step S907), and 1 is added to the variable w (step S908). Then, the variable w at that time, to perform the central axis dimension generation process for generating a dimension in the direction of the central axis C _P axis Aw perpendicular to the central axis C _P (step S909). After that, when the value of the variable w is smaller than 2 (step S910: Yes), the dimension in the axis A2 direction has not been processed, so the process returns to step S908. When the variable w is 2 or more (step S910: No), the processing of this flow ends.

In step S904, the central axis _{C P} is X-axis, Y-axis, but not perpendicular to any two of the axes of Z-axis (Step S904: No), the central axis _{C P} is X-axis, Y-axis, or Z-axis When orthogonal to one axis (step S905: Yes), one orthogonal axis is set to axis Aw, and the reference element plane of axis Aw is set to Eaw (step S911). Here, w is 1. In other words, the axis Aw is X-axis, Y-axis, a one axis perpendicular to the central axis _{C P} of the Z-axis, EAW is Ex, Ey, among Ez, one axis Aw perpendicular to the central axis _{C P} It is a reference element surface.

Then, run the central axis dimension generation process for generating a dimension in the direction of the central axis C _P axis Aw perpendicular to the central axis C _P (step S912). After that, the process proceeds to step S913. Further, in step S905, the central axis _{C P} is X-axis, Y-axis, if not with any orthogonal Z-axis (Step S905: No), the process proceeds to step S913. In step S913, executes the vertex size generating process for generating a dimension between the vertices and the reference element plane is the starting point and the end point of the central axis C _P (step S913), then ends the processing of this flow.

In the flowchart of FIG. 9, the central axis dimension generation process executed in steps S909 and S912 and the vertex dimension generation process executed in step S913 will be described in detail with reference to the flowcharts of FIGS. 10 and 11. FIG. 10 is a flowchart showing the central axis dimension generation process, and FIG. 11 is a flowchart showing the vertex dimension generation process.

In central axis dimension generation process shown in FIG. 10, first, whether generation size determining unit 123, the components of the reference element plane Eaw axis Aw perpendicular to the central axis C _P of the cylinder includes a central axis C _P It is determined whether or not (step S1001). When the center axis C _P is included in the components of the reference element plane Eaw (step S1001: Yes), it is not necessary dimension generation, and terminates the processing of this flow.

Generating dimension determination unit 123, if the central axis _{C P} is not a component of the reference element plane EAW (Step S1001: No), already in the generated dimensions, the axis of the reference element plane EAW to the center axis _{C P} It is determined whether or not there is a dimension that is the same as the linear distance in the Aw direction (step S1002). If there is no size Seeded same distance (step S1002: No), the size generating unit 124 generates the linear dimension of the axial Aw direction associated with the central axis _{C P} (step S1003), and ends the processing of this flow.

If the axis Aw direction of the straight line distance and dimensions of the same from the reference element plane Eaw to the center axis _{C P} is one or more (Step S1002: Yes), the central axis to the set Et elements associated with that dimension Dt C _P to associate with additional (step S1004), and ends the processing of this flow.

At the apex size generating process shown in FIG. 11, first, the vertex of the start and end points of the central axis _{C P} of the cylinder respectively _{O PQ1, O PQ2} (step S1101). Next, 0 is assigned to the variables U and V (step S1102). Next, 1 is added to the variable U (step S1103), and 1 is added to the variable V (step S1104).

Next, when the variable V is 1, the axis A is the X axis and the reference element surface Ea of the axis A is the Ex. When the variable V is 2, the axis A is the Y axis and the reference element surface Ea of the axis A is Ey. When the variable V is 3, the axis A is the Z axis and the reference element surface Ea of the axis A is Ez (step S1105).

Next, the generation dimension determination unit 123 determines whether or not the vertex _OPQU for the variable U is a component of Ea, and if it is a component (step S1106: Yes), the vertex size is not generated. The process proceeds to step S1111. On the other hand, when the vertex _OPQU is not a component of Ea (step S1106: No), among the already generated dimensions, there is the same dimension as the linear distance in the axis A direction from the reference element surface Ea to the vertex _OPQU. Whether or not it is determined (step S1107).

When there is no dimension of the same distance (step S1107: No), the dimension generation unit 124 newly generates a linear dimension in the axis A direction associated with the reference element surface Ea and the vertex _OPQU (step S1110). If it is determined in step S1107 that there are already generated dimensions of the same distance (step S1107: Yes), _OPQU is added to the set Et of the elements associated with Dt (step _S1109 ).

After that, in step S1111, if the value of the variable V is smaller than 3 (step S1111: Yes), there is an axial direction that has not been processed yet, so the process returns to step S1104. When the variable V is 3 or more (step S1111: No), the process of dimension generation is completed in all three X-axis, Y-axis, and Z-axis axial directions, and the process proceeds to step S1112.

In step S1112, if the value of the variable U is less than 2 (step S1112: Yes), the process returns to step S1103, assuming that the vertices of the start point or the end point have not been processed. When the variable U is 2 or more, the processing of the dimensions has been completed for the vertices of the start point and the end point, so the processing of this flow is terminated.

In this way, by executing the dimension generation processing shown in the flowcharts of FIGS. 8 to 11, all the surfaces including the cylindrical surface and other curved surfaces of the three-dimensional model, the ridge lines constituting the surface, the central axis of the cylinder, The dimensions of the vertices with respect to the reference element surface can be generated in association with each other without duplication.

The dimension generation unit 124 stores the three-dimensional model data to which the generated dimensions are added and the dimension element information associated with the dimensions in the storage unit 110 and outputs the data to the output unit 140. The output unit 140 displays the three-dimensional model with the added dimensions on the display. Further, the output unit 140 may display a table in which the dimensions and the dimensional element information associated with the dimensions are arranged on the display.

As described above, in the dimension generation process according to the present embodiment, the model element detection unit 122 detects a surface including a cylindrical surface which is an element of the three-dimensional model and ridges and vertices included in each surface, and generates dimensions. When the surface is a cylindrical surface, the determination unit 123 determines whether or not the dimensions of the central axis of the cylinder and the vertices constituting the central axis are necessary with respect to the reference element surface. Then, the dimension generation unit 124 generates the dimensions of the elements determined by the generation dimension determination unit 123 that the dimensions need to be generated, and adds the elements to the three-dimensional model. As a result, even when the three-dimensional model includes a cylindrical surface, it is possible to generate dimensions without duplication and correctly associate the dimensions with each element including the central axis and the apex of the cylinder.

(Example)
An example of dimension generation executed by the dimension generation device 1 according to the present embodiment will be described using the three-dimensional model shown in FIG. 12 as an example. FIG. 12 is a diagram showing an example of a three-dimensional model. Since this three-dimensional model includes a cylindrical surface, it will be described with reference to the flowchart of the dimension generation process according to the second embodiment shown in FIG.

First, the model element detection unit 122 assigns a number to the surface of the model (step S801). Numbers 1 to 9 are assigned to the bottom surface 1201, the front surface 1202, the right side surface 1203, the back surface 1204, the left side surface 1205, the cylindrical surface 1206, the curved surface 1207, the first upper surface 1208, and the second upper surface 1209, respectively. The maximum value n is 9. Here, they are assigned as shown in FIG. FIG. 13 is a table showing the correspondence between the planes of the three-dimensional model, the numbers, and the reference element planes.

Next, the reference coordinate system determination unit 121 determines the reference coordinate system and the reference element plane based on the operator's selection input (step S802). The detailed flow is as shown in FIG. As the reference coordinate system, the coordinate system 1210 shown in FIG. 12 is determined (step S301). The reference element surface Ex in the X-axis direction is determined to be the left side surface 1205 (step S302). The reference element surface Ey in the Y-axis direction is determined to be the bottom surface 1201 (step S303). The reference element surface Ez in the Z-axis direction is determined to be the front surface 1202 (step S304).

Step S803, S804 because the variable P is 1, the surface _{E P} is a bottom 1201. Since the bottom surface 1201 is the reference element surface Eye (step S805: Yes), the process proceeds to step S811.

In step S811, since P <n (step S811: Yes), the process returns to step S804 and P = 2 (step S804). In this case the surface _{E P} is a front 1202. Since the front surface 1202 is the reference element surface Ez (step S805: Yes), the process proceeds to step S811.

In step S811, since P <n (step S811: Yes), the process returns to step S804 and P = 3 (step S804). In this case the surface _{E P} is a right side 1203. Since the right side surface 1203 is not a reference element surface (step S805: No), the process proceeds to step S806. Since the right side surface 1203 is a plane (step S806: Yes), the plane dimension generation process is executed (step S807).

In the plane dimension generation process shown in FIG. 4, since the right side surface 1203 is not orthogonal to any of the X-axis, Y-axis, and Z-axis (step S401: No), the ridgeline dimension generation process is executed (step S403).

In ridge dimensions generating process shown in FIG. 5, assigns a number to a ridge line model element detection unit 122 is included in the right side 1203 is _{E P} (step S501). As shown in FIGS. 14 and 15, the ridge lines are assigned numbers 1 to 4 to the first ridge line 1401, the second ridge line 1402, the third ridge line 1403, and the fourth ridge line 1404, respectively. The maximum value m is 4. FIG. 14 is a diagram showing an example of a three-dimensional model, and FIG. 15 is a table showing the correspondence between the ridge line of the right side surface 1203 and the number.

When the variable Q is 1 according to steps S502 and S503, the ridgeline _LPQ is the first ridgeline 1401. Since the ridge line L _PQ is orthogonal to the two axes of the X axis and the Y axis (step S504: Yes), the process proceeds to step S506, where the axis A1 becomes the X axis, Ea1 becomes Ex, the axis A2 becomes the Y axis, and Ea2 becomes the Y axis. It becomes Eye (step S506). After w = 1 in steps S507 and S508, an orthogonal ridge dimension generation process is executed for the dimensions of the ridge line _LPQ in the X-axis direction, which is the direction of the axis A1 (step S509).

In the orthogonal ridge dimensions generating process shown in FIG. 6, it is determined whether or not the ridge line L _PQ is a component of the reference element plane EAW (step S601). Since the first ridge line 1401 which is the ridge line L _PQ is not a component of the left side surface 1205 which is the reference element surface Eaw (Ex), the process proceeds to step S602.

Already in the generated dimensions, from the left side surface 1205 is a reference element plane Eaw determines whether there is an X-axis direction of the linear distance the same dimensions and to the first ridge 1401 is ridgeline L _PQ (step Since there is no dimension that has been generated yet (step S602: No), the dimension generation unit 124 newly generates a linear dimension in the X-axis direction that is the axis Aw (step S603). FIG. 16 is a diagram in which the dimension 1601 generated in step S603 is added to the three-dimensional model, and FIG. 17 is a table showing the elements associated with the dimension 1601.

After that, the process proceeds to step S510 of FIG. 5, and since w <2 (step S510: Yes), the process returns to step S508, and after w = 2, the dimension of the ridge line L _PQ in the Y-axis direction, which is A2, is determined. The orthogonal ridge dimension generation process is executed (step S509).

In the orthogonal ridge dimensions generating process shown in FIG. 6, because the first ridge 1401 is ridgeline _{L PQ} is a component of the bottom surface 1201 is a reference element plane Eaw (Ey) (step S601: Yes), the flow of FIG. 5 Return to step S510. Since w = 2 (step S510: No) and Q <m, the process returns to step S503 and Q becomes 2.

When Q = 2, the ridge line L _PQ is the second ridge line 1402. Since the ridge line L _PQ is orthogonal only to the Z axis (step S504: No, step S505: Yes), the axis A1 becomes the Z axis and Ea1 becomes Ez in step S511. An orthogonal ridge dimension generation process is executed for the dimensions of the ridge line _LPQ in the Z-axis direction, which is the direction of the axis A1 (step S512).

In the orthogonal ridge dimensions generating process shown in FIG. 6, because the second ridge 1402 is ridgeline _{L PQ} is a component of the front 1202 is the reference element plane Eaw (Ez) (step S601: Yes), the flow of FIG. 5 Return to, and the vertex dimension generation process is executed (step S513).

In the vertex dimension generation process shown in FIG. 7, the vertices of the start point and the end point of the second ridge line 1402, which is the ridge line L _PQ , are set to _OPQ1 and _OPQ2 , respectively (step S701). FIG. 18 is a diagram showing the positions of the vertices of the three-dimensional model. Here, _OPQ1 is the first vertex 1801 and _OPQ2 is the third vertex 1803. Then, the variables U and V are set to the variables U = 1 and V = 1, respectively (steps S702, S703, S704).

Since V = 1, the axis A is the X axis and Ea is Ex (step S705). The first vertex 1801 which is _OPQ1 is not a component of the left side surface 1205 which is Ex (step S706: No). Therefore, it is determined whether or not there is a dimension having the same distance as the linear distance in the X-axis direction from Ex to _OPQ1 among the already generated dimensions (step S707). Here, the dimensions 1601 shown in FIGS. 16 and 17 correspond to the dimensions of the same distance (step S707: Yes). Here, the dimension 1601 is Dt, and the set of elements associated with the dimension is Et.

Since _OPQ1 itself is not included in the set Et of the elements associated with this Dt (step S709: No), it is determined whether or not there is a surface or ridge line on which the _OPQ1 is a component (step S710). Here, there are three surfaces including the first vertex 1801, which is _OPQ1 , a bottom surface 1201, a front surface 1202, and a right side surface 1203. Further, as shown in FIG. 18, there are three ridge lines including the first vertex 1801 which is _OPQ1 : the first ridge line 1401, the second ridge line 1402, and the fifth ridge line 1805. As shown in FIG. 17, since the set Et of the elements associated with the dimension 1601 includes the first ridge line 1401 (step S710: Yes), the process proceeds to step S712. Since V <3 (step S712: Yes), the process returns to step S704.

V = 2, V = is also proceed in the same manner when 3, in step S706 any _case, the first vertex 1801 is _{O PQ1} is a component of the front 1202 is a bottom 1201, Ez is Ey Therefore (step S706: Yes), the processing of dimension generation (step S708) and addition to Et (step S711) is not performed.

After that, since U <2 (step S713: Yes), U = 2 (step S703), the third vertex 1803, which is _OPQ2 , is subjected to the vertex dimension generation processing in the same manner as in the case of _OPQ1 . V = 2 when, in step _S707, the order is no Y axis direction dimension of the straight line distance and the same distance from the third vertex 1803 is a _{O PQ2} to the bottom surface 1201 is Ey, new Y-axis direction dimension 1902 (Step S708). When the V = 3, in step _S706, the third vertex 1803 is _{O PQ2} are the components of the front 1202 is Ez (step S706: Yes), adding to the dimensions generated (step S708) and Et The process of (step S711) is not performed.

After the vertex dimension generation process is completed, the process proceeds to step S514 in FIG. 5, and since Q <4 (step S514: Yes), the process returns to step S503. After that, the same process is executed, and the ridge line dimension generation process for the third ridge line 1403 and the fourth ridge line 1404 is executed.

With the end of the ridge line dimension generation process of FIG. 5, the plane dimension generation process of FIG. 4 is also completed. That is, step S807 of FIG. 8 has been executed. The dimensions generated at this point are shown in FIGS. 19 and 20. FIG. 19 is a diagram in which dimensions 1601, 1901, 1902, 1903 are added to a three-dimensional model, and FIG. 20 is a table showing elements associated with each dimension.

Here, as the elements associated with each dimension, elements other than the reference element surface and the reference element surface are selected without excess or deficiency. For example, in step S708 of FIG. 7 described _above, to produce a linear distance from the third vertex 1803 is a _{O PQ2} to the bottom surface 1201 is Ey as the dimension 1902, the orthogonal ridge of Figure 6 according to the subsequent fourth ridgeline 1404 In the dimension generation process, since the third vertex 1803, which is the start point or end point of the fourth ridge line 1404, is excluded from Et (step S608), the dimensions are generated without duplication, and the elements associated with the dimensions are accurately selected. be able to.

After step S807 in FIG. 8, since P <9 (step S811: Yes), the process returns to step S804. After that, in the case of P = 4 to 9, the process of FIG. 8 is executed in the same manner.

Since the curved surface 1207, which is the surface of number 7 when P = 7, is neither a flat surface nor a cylindrical surface (step S806: No, step S808: No), it is stored in the storage unit 110 as a target of automatic generation (step). S810).

The dimensions generated at the stage of step S811 when P = 9 are shown in FIGS. 21 and 22. FIG. 21 is a diagram in which dimensions are added to the three-dimensional model, and FIG. 22 is a table showing elements associated with each dimension.

In step S811 when P = 9, since P becomes n or more (step S811: No), the process proceeds to step S812. In step S812, the output unit 140, which is stored in step S810, displays on the display the portion where the automatic dimension cannot be generated, and prompts the operator to manually generate the dimension. FIG. 23 shows an example of displaying a portion where the dimensions cannot be automatically generated. In this embodiment, the curved surface 1207 is highlighted, indicating that it is not subject to automatic generation. After the process of step S812 is completed, the dimension generation process shown in FIG. 8 is completed.

In this way, the dimension generation device 1 according to the first and second embodiments sequentially determines the necessity of dimension generation and generates dimensions for the surfaces, ridges, central axes of the cylinder, and vertices that are related elements. .. Therefore, when the dimension is used for the automatic generation of the machining program or the measurement program, it is possible to prevent the target element from falling off. For example, in the models of FIGS. 12, 14 and 21, the only element associated with dimension 1902 is not the fourth ridge 1404, but the second top surface 1209 including the fourth ridge 1404 is accurately associated with dimension 1902. This makes it possible to prevent the second upper surface 1209 from falling off from the object to be processed or measured.

Further, both the first upper surface 1208 and the second upper surface 1209 having the same dimensions from the bottom surface 1201 which is the reference element surface can be accurately associated with the dimensions 1902. As a result, it is possible to prevent either one of the first upper surface 1208 and the second upper surface 1209 from falling out from the object to be processed or measured. On the other hand, as for the display of the dimensions, since only one dimension 1902 related to the first upper surface 1208 and the second upper surface 1209 is displayed, it is not difficult to see them in duplicate.

As described above, the present invention detects the shape, position or orientation of the element including at least a part of the surface, the ridge line and the apex of the three-dimensional model in the dimension generation of the three-dimensional model, and the shape, position or orientation of the detected element. Based on, the necessity of generating the dimension associated with each of the elements, the other elements associated with the dimension are determined, the dimension determined to be generated, and the dimension element information indicating the element associated with the dimension is generated. It was decided to. As a result, it is possible to generate dimensions without duplication for the 3D model and correctly associate the dimensions with the elements of the target 3D model.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, in the above embodiment, the plane and cylindrical surface dimensions are generated for the surface, and the other surfaces are not automatically generated. However, the dimensions are automatically generated for the surfaces other than the plane and the cylindrical surface. May be good. For example, a process for automatically generating an elliptical cylinder having an elliptical cross section or a surface including a cone may be added.

Further, in the above embodiment, an example in which dimensions are added to the three-dimensional model is shown in FIG. 21, but when the operator selects the dimensions displayed on the screen with the pointer, the elements associated with the dimensions are highlighted. It may be displayed. This makes it easier to visually capture the element of interest for dimensioning.

Further, the hardware configuration and the flowchart shown in the above embodiment are examples, and can be arbitrarily changed and modified. Each function realized by the storage unit 110 and the calculation unit 120 can be realized by using a normal computer system without using a dedicated system.

For example, a computer-readable CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Versatile Disc), MO (Magneto Optical Disc), memory card, etc. can be used as a program for executing the operation of the above embodiment. A computer capable of realizing each function may be configured by storing and distributing the program in the recording medium of the above and installing the program on the computer. Then, when each function is realized by sharing the OS (Operating System) and the application or cooperating with the OS and the application, only the part other than the OS may be stored in the recording medium.

1 Dimension generator, 110 storage unit, 120 calculation unit, 121 reference coordinate system determination unit, 122 model element detection unit, 123 generation dimension determination unit, 124 dimension generation unit, 130 input unit, 140 output unit, 1201 bottom surface, 1202 front surface 1203 right side, 1204 back, 1205 left side, 1206 cylindrical surface, 1207 curved surface, 1208 first upper surface, 1209 second upper surface, 1210 coordinate system, 1401 first ridge, 1402 second ridge, 1403 third ridge, 1404 4 ridges, 1601, 1901, 1902, 1903 dimensions, 1801 first apex, 1803 third apex.

Claims (11)

A model element detector that detects the shape, position, or orientation of an element that includes at least a portion of the surface, ridge, and vertices of a 3D model.
Based on the shape, position, or posture of the element detected by the model element detection unit, the generation dimension determination unit that determines whether or not the dimensions associated with each of the elements need to be generated and other elements associated with the dimensions. ,
A dimension generation unit that generates dimension element information indicating a dimension that is determined by the generation dimension determination unit to be generated and an element associated with the dimension, and a dimension generation unit.
Dimension generator equipped with. Further provided with a reference coordinate system and a reference coordinate system determination unit for determining reference elements orthogonal to the coordinate axes of the reference coordinate system.
The dimension generated by the dimension generator includes a linear distance from the reference element in the coordinate axis direction of the reference coordinate system.
The dimension generator according to claim 1. When the element is a reference element or a part of the reference element, the generation dimension determination unit determines that it is not necessary to generate a dimension associated with the element.
The dimension generator according to claim 2. When the element of the three-dimensional model includes a plane,
The generation dimension determination unit determines that it is not necessary to generate dimensions in the coordinate axis direction associated with the plane when the plane is not orthogonal to any coordinate axis of the reference coordinate system, and includes the plane. Determining the necessity of generating dimensions associated with the ridges
The dimension generator according to claim 2 or 3. The generation dimension determination unit determines that it is not necessary to generate the dimension in the coordinate axis direction associated with the ridge line when the ridge line is not orthogonal to any coordinate axis of the reference coordinate system, and determines that the start point of the ridge line. And determine the necessity of generating dimensions associated with the ridge that is the end point,
The dimension generator according to claim 4. When the element of the 3D model includes at least a part of the face of the cylinder,
The generation dimension determination unit determines that it is not necessary to generate the dimension in the coordinate axis direction associated with the central axis when the central axis of the cylinder is not orthogonal to any coordinate axis of the reference coordinate system. Determining the necessity of generating dimensions associated with the vertices that are the start and end points of the central axis.
The dimension generator according to any one of claims 2 to 5. When the generated dimension determination unit generates the same dimension as the linear distance from the reference element to the element in the coordinate axis direction orthogonal to the element, it is not necessary to generate the dimension associated with the element. Judge,
The dimension generator according to any one of claims 2 to 6. In the dimension generation unit, the element is not the reference element or a part of the reference element, the element is orthogonal to any of the coordinate axes of the reference coordinate system, and the coordinate axes from the reference element to the element. When the same dimension as the linear distance in the direction is generated, the element to be determined is added to the set of elements associated with the existing dimension.
The dimension generator according to any one of claims 2 to 7. The generated dimension determination unit excludes the components of the element to be determined from the existing set of elements associated with the dimension.
The dimension generator according to claim 8. A model element detection step that detects the shape, position, or orientation of an element in a 3D model, and
The necessity of generating the dimension associated with each of the elements detected in the model element detection step, and the generation dimension determination step for determining other elements associated with the dimension.
A dimension generation step for generating dimension element information indicating a dimension determined to be required to be generated in the generation dimension determination step and an element associated with the dimension, and a dimension generation step.
Dimension generation method having. Computer,
Model element detector that detects the shape, position or orientation of the elements of the 3D model,
A generation dimension determination unit that determines whether or not a dimension associated with each of the elements detected by the model element detection unit needs to be generated, and another element associated with the dimension.
A dimension generation unit that generates dimensional element information indicating a dimension determined by the generation dimensional determination unit to be generated and an element associated with the dimension.
A program that functions as.

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