JP6597143B2 - Display processing method, display processing program, and display processing apparatus - Google Patents

Description

  The present invention relates to a display processing method, a display processing program, and a display processing apparatus.

  CAE (Computer Aided Engineering) is known as an example of a technology that uses computer technology to support product design, manufacturing, and advance examination of process design. In the CAE field, with the improvement in hardware performance, there is an increasing need for highly parallel calculation such as simulation for a large-scale analysis model.

JP-A-2-230468

  However, in the above technique, there is a case where the speed of displaying a condition given to the inner and outer boundary surfaces of the analysis model, that is, a so-called boundary condition is reduced.

  That is, as the analysis model increases in scale, the mesh size applied to the analysis model also becomes finer. Thus, the smaller the mesh size, the greater the number of elements in which the analysis model is divided by the mesh. In this case, as a result of drawing boundary conditions such as load conditions and constraint conditions for each element belonging to the plane of the analysis model for which the boundary conditions are set, the display speed related to the boundary conditions decreases.

  In one aspect, an object of the present invention is to provide a display processing method, a display processing program, and a display processing device that can suppress a decrease in display speed related to boundary conditions.

  In one aspect, the position information of a plurality of nodes defining the boundaries of the plurality of areas associated with the information is acquired from the storage unit, the specific information of the plurality of nodes is referred to with reference to the acquired position information A new line is generated based on a node included in a predetermined range from a line passing through the node and another node different from the specific node among the plurality of nodes, and the feature point of the generated new line A computer executes a process of generating a plurality of areas having boundaries passing through and displaying the generated plurality of areas in a display mode according to the information.

  It can suppress that the display speed regarding a boundary condition falls.

FIG. 1 is a diagram illustrating a configuration example of a CAE analysis system according to the first embodiment. FIG. 2 is a block diagram illustrating an example of a functional configuration of the server apparatus according to the first embodiment. FIG. 3A is a diagram illustrating a specific example of a method for generating a simple surface. FIG. 3B is a diagram illustrating a specific example of a method for generating a simple surface. FIG. 4 is a flowchart (1) illustrating a procedure of display processing according to the first embodiment. FIG. 5 is a flowchart (2) illustrating the procedure of the display process according to the first embodiment. FIG. 6 is a diagram illustrating a hardware configuration example of a computer that executes the display processing program according to the first embodiment and the second embodiment.

  Hereinafter, a display processing method, a display processing program, and a display processing device according to the present application will be described with reference to the accompanying drawings. Note that this embodiment does not limit the disclosed technology. Each embodiment can be appropriately combined within a range in which processing contents are not contradictory.

[System configuration]
FIG. 1 is a diagram illustrating a configuration example of a CAE analysis system according to the first embodiment. A CAE analysis system 1 shown in FIG. 1 provides a CAE analysis service for executing a simulation of an analysis model.

  As part of the CAE analysis service, when the boundary condition set in the analysis model obtained by dividing the CAD (Computer Aided Design) data 3D model is displayed on the boundary surface of the analysis model in which the boundary condition is set Provided is a display processing service capable of suppressing a decrease in display speed related to boundary conditions by generating boundary condition display data by thinning out the belonging nodes while preserving the shape characteristics of the boundary surface.

  As shown in FIG. 1, the CAE analysis system 1 includes a server device 10 and client terminals 30 </ b> A to 30 </ b> C. Although FIG. 1 illustrates a case where three client terminals are accommodated, the number of client terminals accommodated by the server apparatus 10 is not limited to the illustrated example, and an arbitrary number of client terminals can be accommodated. . In the following, when the devices of the client terminals 30A to 30C are collectively referred to without distinction, they may be referred to as “client terminals 30”.

  The server device 10 and the client terminal 30 are connected via the network 5 so that they can communicate with each other. For example, the network 5 may be any type of communication network, such as the Internet (Internet), LAN (Local Area Network), and VPN (Virtual Private Network), regardless of wired or wireless.

  The server device 10 is a computer that provides the CAE analysis service to the client terminal 30.

  As one embodiment, the server apparatus 10 can be implemented by installing CAE analysis software for realizing the above-described CAE analysis service, so-called CAE tool, as package software or online software on a desired computer. Such CAE analysis software may be provided as an application program including a preprocessor that implements the display processing service as a component, or may be provided as a library in which the preprocessor is added to the CAE analysis software. For example, the server device 10 may be implemented as a Web server that provides the CAE analysis service, or may be implemented as a cloud that provides the CAE analysis service by outsourcing.

  The client terminal 30 is a computer that receives the above-described CAE analysis service from the server device 10.

  As an embodiment, a personal computer can be adopted as the client terminal 30. As the client terminal 30, not only a stationary terminal such as the above personal computer but also various portable terminal devices can be adopted as the client terminal 30. For example, as an example of a mobile terminal device, a mobile communication terminal such as a smart phone, a mobile phone or a PHS (Personal Handyphone System), and a slate terminal such as a PDA (Personal Digital Assistants) are included in the category.

  Here, as an example, a client server system that provides the above display processing service is illustrated as an example. However, as will be described later, display processing corresponding to the above display processing service may be executed in a stand-alone manner. It doesn't matter.

[Configuration of Server Device 10]
FIG. 2 is a block diagram illustrating an example of a functional configuration of the server apparatus 10 according to the first embodiment. As illustrated in FIG. 2, the server device 10 includes a communication I / F (interface) unit 11, a storage unit 13, and a control unit 15.

  FIG. 2 illustrates a processing unit that is virtually realized by the preprocessor and data that is referred to or registered by the processing unit. These are the minimum processing for realizing the display processing service. Only the parts and data are shown. That is, in addition to the above preprocessor, the server device 10 is referred to or registered by a processing unit and a processing unit that are virtually realized by a solver that performs simulation calculation or a postprocessor that processes a result calculated by the solver. It does not matter if you have data to do. Further, the server device 10 may include various functional units that are standardly installed in known computers, for example, various input devices and audio output devices, in addition to the functional units illustrated in FIG.

  The communication I / F unit 11 is an interface that performs communication control with another device, for example, the client terminal 30.

  As an embodiment, a network interface card such as a LAN card can be adopted as the communication I / F unit 11. For example, the communication I / F unit 11 receives an analysis model browsing request from the client terminal 30, or transmits analysis model display data corresponding to the browsing request to the client terminal 30.

  The storage unit 13 is a storage device that stores data used for various programs such as an OS (Operating System) executed by the control unit 15 and the above-described CAE analysis software or preprocessor.

  As an embodiment, the storage unit 13 is implemented as a main storage device in the server device 10. For example, various semiconductor memory elements such as a RAM (Random Access Memory) and a flash memory can be employed for the storage unit 13. The storage unit 13 can also be implemented as an auxiliary storage device. In this case, an HDD (Hard Disk Drive), an optical disk, an SSD (Solid State Drive), or the like can be employed.

  The storage unit 13 stores analysis model data 13a and boundary condition data 13b as an example of data used in a program executed by the control unit 15. In addition to the analysis model data 13a and the boundary condition data 13b, other electronic data, for example, the original CAD data from which the analysis model data is generated can also be stored.

  The analysis model data 13a is data related to the analysis model.

  As one embodiment, the analysis model data 13a is generated by capturing CAD data of a 3D model by a preprocessor. Specifically, when CAD data is captured, the preprocessor refers to settings such as the shape of an analysis model element obtained by mesh division and the size of a mesh that divides a 3D model. The preprocessor then divides the 3D model into meshes according to settings such as the element shape and mesh size. By such mesh division, for example, a 3D model is divided into tetrahedral elements, hexahedral elements, and the like, and as a result, a set of tetrahedral elements and hexahedral elements is obtained as an analysis model.

  Here, the analysis model data 13a includes vertex data of elements such as tetrahedral elements and hexahedral elements, point data in which so-called nodes are defined, and surface data in which the surfaces of the elements are defined. Among these, for the point data, identification information for identifying a node, for example, data in which the X coordinate, Y coordinate, and Z coordinate of the node are associated with each point ID (IDentification) can be adopted. Further, as the surface data, identification information for identifying the surface of the element, for example, data in which a point ID of a node included in the surface is associated with each surface ID can be adopted. For example, when 3D data is divided into hexahedral elements, eight nodes and six faces are obtained for each element by the above mesh division. In this case, since the surface forming the element is a rectangle, in the surface data, four point IDs are associated with one surface ID.

  The boundary condition data 13b is data relating to conditions given to the inner and outer boundary surfaces of the analysis model, that is, so-called boundary conditions. The “boundary condition” here includes, for example, a load condition and a constraint condition. Furthermore, there are types such as concentrated loads and distributed loads in the load conditions, and types such as point constraints and surface constraints also exist in the constraint conditions, and there are various types of load conditions and constraint conditions. .

  As one embodiment, the boundary condition data 13b is data in which the content of the boundary condition is associated with the point ID of the node included in the boundary surface of the analysis model in which the boundary condition is set and the surface ID of the surface. Can be adopted. Hereinafter, the boundary surface of the analysis model in which boundary conditions are set may be referred to as “boundary condition setting surface”. As an example of the boundary condition data 13b, the client terminal 30 performs an operation for setting boundary conditions such as a load condition and a constraint condition on the boundary surface of the analysis model in a state where the analysis model of the analysis model data 13a is displayed. If registered. For example, the boundary condition data 13b is registered in the storage unit 13 after associating the boundary condition type, physical quantity, dimensional unit related to the physical quantity, and the like as the contents of the boundary condition for each node and face included in the boundary face. The

  The control unit 15 has an internal memory for storing various programs and control data, and executes various processes using these.

  As an embodiment, the control unit 15 is implemented as a central processing unit, a so-called CPU (Central Processing Unit). Note that the control unit 15 is not necessarily implemented as a central processing unit, and may be implemented as an MPU (Micro Processing Unit). The control unit 15 can also be realized by a hard wired logic such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA).

  The control unit 15 virtually implements the following processing unit by executing various programs, for example, a preprocessor. For example, as shown in FIG. 2, the control unit 15 includes an acquisition unit 15a, a first generation unit 15b, a first extraction unit 15c, a second extraction unit 15d, a second generation unit 15e, and a display control unit. 15f.

  The acquisition unit 15a is a processing unit that acquires the boundary condition data 13b.

  As one embodiment, when the acquisition unit 15 a receives an analysis model browsing request from the client terminal 30, the analysis model data of the analysis model specified by the browsing request among the analysis model data 13 a stored in the storage unit 13. To get. Subsequently, the acquisition unit 15a determines whether or not a boundary condition is set for the analysis model specified in the browsing request. At this time, when the boundary condition is set in the analysis model specified by the browsing request, the acquisition unit 15a has the boundary condition of the boundary condition corresponding to the analysis model among the boundary condition data 13b stored in the storage unit 13. Get more data. In addition, here, as an example, the case where the boundary condition set in the analysis model is displayed together with the analysis model is illustrated, but the boundary condition display may be performed by narrowing the shape display range to the boundary condition setting plane. It doesn't matter.

  The first generation unit 15b refers to the boundary condition data and passes through a specific node among the plurality of nodes included in the boundary condition setting surface and another node different from the specific node among the plurality of nodes. A processing unit that generates a new line based on nodes included in a predetermined range from the line.

  As one embodiment, the first generation unit 15b calculates the centroid of the boundary condition setting surface, that is, the center of gravity, from the boundary condition setting surface formed by the set of surface IDs included in the boundary condition data acquired by the acquisition unit 15a. To do. Then, the first generation unit 15b sets the node having the shortest distance from the centroid calculated earlier among the node IDs of the nodes existing on the boundary condition setting surface as the “center node”. For example, assuming that the Z-axis is in the height direction in the three-dimensional space of XYZ, the node having the shortest distance from the centroid on the XY plane of the X and Y coordinates is set as the “center node”. After that, the first generation unit 15b extracts the node IDs of the nodes located on the outer periphery of the boundary condition setting surface from the node IDs of the nodes existing on the boundary condition setting surface as “outer peripheral nodes”. Then, the first generation unit 15b generates a “triangular patch” determined by the two adjacent line segments by setting a line segment radially from the central node to each outer peripheral node. . As a result, the same number of triangular patches as the number of line segments set from the central node to the outer peripheral node are generated. After that, the first generation unit 15b projects the three-dimensional search space for searching for a node on the boundary condition setting plane by projecting the previously generated triangular patch onto the Z-axis direction, that is, the XY plane. Generate every.

  Thereafter, the first generation unit 15b selects one of the search spaces generated previously. Subsequently, the first generation unit 15b selects a node existing in the previously selected search space among the nodes existing on the boundary condition setting surface, as one side surface forming the search space, in other words, two adjacent lines. Projection is performed on a plane including one line segment of the minutes and parallel to the Z axis. In this way, when a node in the search space is projected onto one side surface of the search space, it is standardized to which side of the two side surfaces the node in the search space is projected between the search spaces. Hereinafter, the side surface of the search space on which the nodes in the search space are projected may be referred to as “projection plane”. Then, the first generation unit 15b approximates a set of points plotted on the projection plane by projecting the nodes in the search space to a curve by an interpolation method such as a least square method or a spline interpolation. A curve obtained by approximating a set of points plotted on the projection plane in this way may be referred to as an “approximate line”. Thereby, an approximate line is obtained for each search space.

  The first extraction unit 15c is a processing unit that extracts a node corresponding to the inflection point of the approximate line.

  As an embodiment, the first extraction unit 15c detects an inflection point from the approximate line every time the approximate line is generated by the first generation unit 15b. For example, the first extraction unit 15c regards the approximate line as a function, obtains a second derivative by differentiating the approximate line, and a zero cross point at which the value of the second derivative of the approximate line becomes “0”. Is detected to calculate an inflection point of the first derivative of the approximate line, for example, a minimum value or a maximum value. Thereafter, the first extraction unit 15c determines whether the inflection point has been successfully detected from the approximate line. At this time, if the inflection point is successfully detected from the approximate line, it can be determined that the shape of the boundary condition setting surface, for example, features such as irregularities appear at the inflection point. In this case, the 1st extraction part 15c extracts the node corresponding to an inflection point among the nodes in the said search space as a node of the following simple surface.

  Here, the “simple surface” refers to a simplified version of the boundary condition setting surface in which the number of nodes is thinned out from the boundary condition setting surface on the analysis model drawn using the analysis model data 13a. This is only for display for confirming the boundary condition, and is not used for analysis as it is. When such a simple surface is displayed, nodes other than the nodes corresponding to the inflection points and the nodes outside the outer peripheral nodes among the nodes in the search space are more intermediate than when the boundary condition setting surface is drawn using the analysis model data 13a. As a result of drawing, at least one or both of the drawing processing amount and the processing time can be reduced.

  The second extraction unit 15d is a processing unit that extracts outer peripheral nodes in the search space.

  As an embodiment, when the inflection point is successfully detected from the approximate line, the second extraction unit 15d extracts the outer peripheral node of the line segment on the projection plane side from the nodes in the search space. On the other hand, when the inflection point is not successfully detected from the approximate line, it can be seen that the approximate line is linear. In this case, the second extraction unit 15d sets a straight line between the outer peripheral node of the line segment on the projection plane side and two outer peripheral nodes adjacent to the outer peripheral node. For example, assuming that the outer peripheral node of the line segment on the projection plane side is the first outer peripheral node, the first straight line passing through the first outer peripheral node and the second outer peripheral node adjacent to the first outer peripheral node, and the first And a second straight line passing through a third outer peripheral node adjacent to the first outer peripheral node and different from the second outer peripheral node. Then, the second extraction unit 15d determines whether or not the angle formed by the first straight line and the second straight line satisfies a predetermined condition. For example, the second extraction unit 15d determines whether the smaller one of the two angles formed by the first straight line and the second straight line is a predetermined threshold, for example, 5 degrees or more. At this time, when the angle formed by the two straight lines is less than the threshold, the second outer peripheral node and the third outer peripheral node are connected via the first outer peripheral node, and the first outer peripheral node is connected. Therefore, it can be determined that there is no great difference in local contour between the case where the second outer peripheral node and the third outer peripheral node are connected by a straight line. In this case, the second extraction unit 15d does not extract the outer peripheral nodes of the line segment on the projection plane side. On the other hand, when the angle formed by the two straight lines is equal to or greater than the threshold value, the second outer peripheral node and the third outer peripheral node are connected via the first outer peripheral node, and the first outer peripheral node is not passed. It can be determined that there is a difference in local contour between the case where the second outer peripheral node and the third outer peripheral node are connected by a straight line. In this case, the second extraction unit 15d extracts the peripheral nodes of the line segment on the projection plane side as the nodes of the simple surface.

  Here, the case where it is determined whether or not the smaller one of the two angles formed by the first straight line and the second straight line is equal to or greater than a predetermined threshold is described. It may be determined whether the larger angle is less than a predetermined value, for example, 180 degrees-α.

  The second generation unit 15e is a processing unit that generates the simple surface.

  As an embodiment, the second generation unit 15e performs extraction of nodes corresponding to the inflection points, extraction of the outer peripheral nodes, and the like for all search spaces generated by the first generation unit 15b. Then, the simple surface is generated by combining the nodes extracted by the first extraction unit 15c and the second extraction unit 15d with polygonal patches, for example, triangular patches.

  The display control unit 15 f is a processing unit that executes display control on the client terminal 30.

  As one embodiment, the display control unit 15f changes the display color of the simple surface according to the type of the boundary condition specified in the boundary condition data when the boundary condition is set in the analysis model specified in the browsing request. To do. For example, if the boundary condition is “load condition”, the display color of the simple surface is set to “red”, while if the boundary condition is “constraint condition”, the display color of the simple surface is set to “blue”. To do. In addition, the display control unit 15f draws a portion other than the boundary condition setting surface of the analysis model using the point data and surface data included in the analysis model data acquired by the acquisition unit 15a, and also displays the boundary condition setting surface. Is drawn according to the nodes defined on the simple surface generated by the second generation unit 15e, thereby generating display data for the analysis model. Here, as an example, the case where the drawing of the boundary condition is simplified by changing the display color of the simple surface according to the type of the boundary condition is illustrated, but the display method of the boundary condition is not limited to this. For example, the display control unit 15f can display the boundary condition with a symbol, a figure, a message, or the like for each triangular patch of the simple surface.

[Concrete example]
A specific example relating to a method for generating a simple surface will be described with reference to FIGS. 3A and 3B. 3A and 3B are diagrams illustrating a specific example of a method for generating a simple surface. From the top of FIG. 3A, only the boundary condition setting surface P is extracted from the shape of the analysis model and is schematically illustrated. Here, the density of nodes existing on the boundary condition setting plane P is schematically shown by “sparse”. However, since a large-scale analysis model is actually performed, the density of nodes is higher than the illustrated example. Needless to say, is "dense".

  As shown first from the top in FIG. 3A, the boundary condition setting is made from the boundary condition setting surface P formed by the set of surface IDs included in the boundary condition data set in the analysis model specified by the browsing request from the client terminal 30. The centroid of the plane P is calculated. Thereafter, the node having the shortest distance from the centroid on the XY plane of the X and Y coordinates among the nodes existing on the boundary condition setting plane P is set as the central node A (S1). After that, as shown second from the top in FIG. 3A, nodes located on the outer periphery of the boundary condition setting surface P among the nodes existing on the boundary condition setting surface P are extracted as outer peripheral nodes (S2).

  Subsequently, as shown third from the top in FIG. 3A, by setting a line segment radially from the central node A to each outer peripheral node, the “triangular patch” determined by the two adjacent line segments is determined for each two adjacent line segments. Is generated (S3). In this example, the triangular patch T1 including the central node A, the outer peripheral node A ′, and the outer peripheral node A ″ at the apexes is indicated by shading. Such a triangular patch is generated over the same number as the number of line segments set from the central node A to the outer peripheral node. Then, as shown in the fourth from the top in FIG. 3A, a three-dimensional search space S1 for searching for nodes on the boundary condition setting plane P is obtained by projecting the triangular patch T1 onto the Z-axis direction, that is, the XY plane. It is generated for each triangular patch (S4).

  After that, as shown first from the top in FIG. 3B, the nodes existing in the search space S1 among the nodes existing on the boundary condition setting plane P are one side surface forming the search space S1, that is, two adjacent lines. A plane including one line segment AA ″ of the minutes and parallel to the Z axis is projected as a projection plane D1, that is, a shaded portion plane shown in the figure. Further, an approximate line L1 is generated by approximating a set of points plotted on the projection plane D1 to a curve by a predetermined interpolation method by projecting the nodes in the search space S1 (S5).

  If the inflection point does not exist in the approximate line L1, as shown in the second from the top in FIG. The first straight line and the second straight line passing through the outer peripheral node A ″ and the adjacent outer peripheral node A ′ are set. In this example, an example is shown in which the angle β formed by the first straight line and the second straight line is a predetermined threshold, for example, 5 degrees or more. In this case, the outer peripheral node A ″ is extracted as a simple surface node (S6). Although illustration is omitted, when there is an inflection point on the approximate line, it can be determined that the shape of the boundary condition setting surface P, for example, features such as irregularities are likely to appear at the inflection point. As described above, the nodes corresponding to the inflection points among the nodes in the search space are extracted as the nodes of the simple surface.

  After that, when extraction of nodes corresponding to the above inflection points or extraction of the above outer peripheral nodes is executed for all search spaces, the extracted inflection points and outer peripheral nodes are combined with a triangular patch. As a result, the third simple surface Q shown in FIG. 3B from the top is displayed (S7).

  When the boundary condition setting surface P and the simple surface Q are compared, when the simple surface Q is displayed, the boundary condition setting surface P is more than the number of nodes in the search space than when the boundary condition setting surface P is drawn using the analysis model data 13a. It can be seen that, as a result of thinning out the nodes corresponding to the inflection points and the nodes other than the outer peripheral nodes, the processing amount and processing time for drawing the nodes can be reduced, and hence the processing amount and processing time for drawing the boundary conditions can also be reduced.

[Process flow]
4 and 5 are flowcharts illustrating a display processing procedure according to the first embodiment. This process is started only when an analysis model browsing request is received from the client terminal 30 as an example.

  As illustrated in FIG. 4, the acquisition unit 15 a acquires the analysis model data of the analysis model specified by the browsing request by the client terminal 30 from the analysis model data 13 a stored in the storage unit 13 (Step S <b> 101).

  At this time, when the boundary condition is set in the analysis model specified in the browsing request (step S102 Yes), the acquisition unit 15a includes the boundary corresponding to the analysis model in the boundary condition data 13b stored in the storage unit 13. Further, boundary condition data of the condition is acquired (step S103).

  Subsequently, the first generation unit 15b calculates the centroid of the boundary condition setting surface from the boundary condition setting surface formed by the set of surface IDs included in the boundary condition data acquired in step S103 (step S104).

  Then, the first generation unit 15b sets the node having the shortest distance from the centroid calculated in step S104 among the node IDs of the nodes existing on the boundary condition setting plane as the “center node” (step S104). S105).

  Thereafter, the first generation unit 15b extracts the point ID of the node located on the outer periphery of the boundary condition setting surface from the node IDs of the nodes existing on the boundary condition setting surface as “outer peripheral node” (step S106).

  Then, the first generation unit 15b sets a line segment radially from the central node set in step S105 to each outer peripheral node extracted in step S106, so that the two lines for each two adjacent line segments are set. A “triangular patch” determined by the minutes is generated (step S107).

  After that, the first generation unit 15b projects a triangular patch generated in step S107 onto the boundary condition setting plane by projecting the triangular patch generated in step S107 in the Z-axis direction, that is, the XY plane. It is generated for each patch (step S108).

  Thereafter, the first generation unit 15b selects one search space generated in step S108 (step S109). Subsequently, the first generation unit 15b selects a node existing in the search space selected in step S109 among the nodes existing on the boundary condition setting surface, as one side surface forming the search space, in other words, two adjacent nodes. Projection is performed on a plane including one of the line segments and parallel to the Z axis (step S110).

  Then, the first generation unit 15b approximates a set of points plotted on the projection plane by projecting the nodes in the search space in step S110 to a curve by an interpolation method such as a least square method or a spline interpolation. Thus, an “approximate line” is generated (step S111).

  Here, if an inflection point exists in the approximate line (Yes in step S112), it can be determined that the shape of the boundary condition setting surface, for example, features such as irregularities are likely to appear at the inflection point. In this case, the first extraction unit 15c extracts the node corresponding to the inflection point among the nodes in the search space as the node of the simple surface (step S113), and the line on the projection plane side among the nodes in the search space. Minute outer peripheral nodes are extracted (step S114), and the process proceeds to step S118 described later.

  On the other hand, when the inflection point does not exist in the approximate line (No in step S112), the second extraction unit 15d determines that there is 2 between the outer peripheral node of the line segment on the projection plane side and the two outer peripheral nodes adjacent to the outer peripheral node. Two straight lines are set (step S115). Then, the second extraction unit 15d determines whether or not the angle formed by the two straight lines set in step S115 is greater than or equal to a predetermined threshold (step S116).

  At this time, when the angle formed by the two straight lines is less than the threshold (No in step S116), the second outer peripheral node and the third outer peripheral node are connected via the first outer peripheral node, and the first outer peripheral node. It can be determined that there is no great difference in local contour between the case where the second outer peripheral node and the third outer peripheral node are connected by a straight line without passing through the node. In this case, the outer peripheral nodes of the line segment on the projection plane side are not extracted, and the process of step S117 is skipped and the process proceeds to step S118.

  On the other hand, when the angle formed by the two straight lines is equal to or greater than the threshold (Yes in step S116), the second outer peripheral node and the third outer peripheral node are connected via the first outer peripheral node, and the first outer peripheral node. It can be determined that there is a difference in the local contour between the case where the second outer peripheral node and the third outer peripheral node are connected by a straight line without going through. In this case, the second extraction unit 15d extracts the outer peripheral nodes of the line segment on the projection plane side as the nodes of the simple surface (step S117).

  Thereafter, the processes from step S109 to step S117 are repeated until all the search spaces generated in step S108 are selected (No in step S118).

  When all the search spaces generated in step S108 are selected (step S118 Yes), the second generation unit 15e uses the first extraction unit 15c and the second extraction unit 15d as the polygon patches. For example, the simple surface is generated by combining with a triangular patch (step S119).

  Subsequently, the display control unit 15f sets the display color of the simple surface in accordance with the type of boundary condition defined in the boundary condition data acquired in step S103 (step S120).

  After that, the display control unit 15f draws the portion other than the boundary condition setting surface of the analysis model using the point data and surface data included in the analysis model data acquired in step S101, and also displays the boundary condition setting surface. By drawing the portion according to the nodes defined on the simple surface generated in step S119, the analysis model display data is generated (step S121), and the analysis model display data is transmitted to the client terminal 30; End the process.

[One aspect of effect]
As described above, the server apparatus 10 according to the present embodiment sets a line that passes through the central node and the outer peripheral node on the boundary surface of the analysis model in which the boundary condition is set, and is in the space between the two lines. A node corresponding to an inflection point of a new line appearing on a projection plane obtained by projecting the node in one direction is extracted. As a result, the processing amount and processing time for drawing a node can be reduced, and the processing amount and processing time for drawing a boundary condition can also be reduced. Therefore, according to the server device 10 according to the present embodiment, it is possible to suppress a decrease in the display speed related to the boundary condition.

  Although the embodiments related to the disclosed apparatus have been described above, the present invention may be implemented in various different forms other than the above-described embodiments. Therefore, another embodiment included in the present invention will be described below.

[Stand-alone]
In the first embodiment, the case where the CAE analysis service is provided by constructing the client server system is illustrated, but the client server system may not necessarily be constructed. For example, the client terminal 30 can execute various processes including the display process shown in FIGS. 4 and 5 in a stand-alone manner. In this case, application programs such as CAE analysis software and preprocessors that implement various processes including the display process shown in FIGS. 4 and 5 may be preinstalled or installed via a network or a recording medium. That is, a processing unit that performs the same processing as each processing unit in the control unit 15 may be installed in the client terminal 30. In this case, the analysis model data 13a and the boundary condition data 13b can be stored in advance in the storage unit of the client terminal 30.

[Distribution and integration]
In addition, each component of each illustrated apparatus does not necessarily have to be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured. For example, the acquisition unit 15a, the first generation unit 15b, the first extraction unit 15c, the second extraction unit 15d, the second generation unit 15e, or the display control unit 15f is connected as an external device of the server device 10 via a network. Also good. In addition, another device has the acquisition unit 15a, the first generation unit 15b, the first extraction unit 15c, the second extraction unit 15d, the second generation unit 15e, or the display control unit 15f, and cooperates by being connected to the network. Thus, the function of the server device 10 may be realized. Further, another device has all or a part of the analysis model data 13a and boundary condition data 13b stored in the storage unit 13, and the functions of the server device 10 described above can be achieved by cooperating with a network connection. You can make it happen.

[Display processing program]
The various processes described in the above embodiments can be realized by executing a prepared program on a computer such as a personal computer or a workstation. In the following, an example of a computer that executes a display processing program having the same function as that of the above-described embodiment will be described with reference to FIG.

  FIG. 6 is a diagram illustrating a hardware configuration example of a computer that executes the display processing program according to the first embodiment and the second embodiment. As shown in FIG. 6, the computer 100 includes an operation unit 110a, a speaker 110b, a camera 110c, a display 120, and a communication unit 130. Further, the computer 100 includes a CPU 150, a ROM 160, an HDD 170, and a RAM 180. These units 110 to 180 are connected via a bus 140.

  As shown in FIG. 6, the HDD 170 includes the acquisition unit 15a, the first generation unit 15b, the first extraction unit 15c, the second extraction unit 15d, the second generation unit 15e, and the display control unit described in the first embodiment. A display processing program 170a that exhibits the same function as 15f is stored. The display processing program 170a is the same as each component of the acquisition unit 15a, the first generation unit 15b, the first extraction unit 15c, the second extraction unit 15d, the second generation unit 15e, and the display control unit 15f illustrated in FIG. They can be integrated or separated. That is, the HDD 170 does not necessarily have to store all the data shown in the first embodiment, and data used for processing may be stored in the HDD 170.

  Under such an environment, the CPU 150 reads out the display processing program 170 a from the HDD 170 and expands it in the RAM 180. As a result, the display processing program 170a functions as a display processing process 180a as shown in FIG. The display processing process 180a expands various data read from the HDD 170 in an area allocated to the display processing process 180a in the storage area of the RAM 180, and executes various processes using the expanded various data. For example, the processes shown in FIGS. 4 and 5 are included as an example of the process executed by the display process 180a. Note that the CPU 150 does not necessarily operate all the processing units described in the first embodiment, and the processing unit corresponding to the process to be executed may be virtually realized.

  Note that the display processing program 170a is not necessarily stored in the HDD 170 or the ROM 160 from the beginning. For example, the display processing program 170a is stored in a “portable physical medium” such as a flexible disk inserted into the computer 100, so-called FD, CD-ROM, DVD disk, magneto-optical disk, IC card or the like. Then, the computer 100 may acquire and execute the display processing program 170a from these portable physical media. Further, the display processing program 170a is stored in another computer or server device connected to the computer 100 via a public line, the Internet, a LAN, a WAN, etc., and the computer 100 acquires the display processing program 170a from these. May be executed.

DESCRIPTION OF SYMBOLS 1 CAE analysis system 5 Network 10 Server apparatus 11 Communication I / F part 13 Memory | storage part 13a Analysis model data 13b Boundary condition data 15 Control part 15a Acquisition part 15b 1st generation part 15c 1st extraction part 15d 2nd extraction part 15e 2nd Generation unit 15f Display control unit 30A, 30B, 30C Client terminal

Claims (5)

Obtaining position information of a plurality of nodes defining the boundaries of a plurality of areas associated with the information from the storage unit,
With reference to the acquired position information, a node included in a predetermined range from a line passing through a specific node among the plurality of nodes and another node different from the specific node among the plurality of nodes. To generate a new line,
Generating a plurality of regions having boundaries passing through feature points of the generated new line;
Displaying the generated plurality of regions in a display mode according to the information;
The computer executes the process ,
The display processing method, wherein the specific node is a node corresponding to the centroid of the plurality of regions, and the other node is a plurality of outer peripheral nodes included in an outer periphery of the plurality of regions . The generation process includes a process of setting a line segment radially from the node corresponding to the centroid to the plurality of outer peripheral nodes, and a range between two adjacent line segments. include projecting the node to the projection surface is, on the basis of the distribution of the points corresponding to nodes included in the range that is projected onto the projection plane, to claim 1, characterized in that to generate the new lines The display processing method described. When the feature point does not exist on the new line, the first straight line passing through the first outer peripheral node and the second outer peripheral node adjacent to the first outer peripheral node, the first outer peripheral node, and the first outer node Processing for determining whether or not an angle formed by a second straight line passing through a third outer peripheral node adjacent to one outer peripheral node and different from the second outer peripheral node satisfies a predetermined condition The computer further executes
Process, display process according to claim 1 or 2, characterized in that said angle produces a plurality of regions having the first boundary through the outer peripheral nodes when the predetermined condition is satisfied for the generation Method. Obtaining position information of a plurality of nodes defining the boundaries of a plurality of areas associated with the information from the storage unit,
With reference to the acquired position information, a node included in a predetermined range from a line passing through a specific node among the plurality of nodes and another node different from the specific node among the plurality of nodes. To generate a new line,
Generating a plurality of regions having boundaries passing through feature points of the generated new line;
Displaying the generated plurality of regions in a display mode according to the information;
Let the computer execute the process ,
The display processing program characterized in that the specific node is a node corresponding to the centroid of the plurality of regions, and the other nodes are a plurality of outer peripheral nodes included in the outer periphery of the plurality of regions . An acquisition unit that acquires, from the storage unit, position information of a plurality of nodes that define boundaries of a plurality of regions associated with the information;
With reference to the acquired position information, a node included in a predetermined range from a line passing through a specific node among the plurality of nodes and another node different from the specific node among the plurality of nodes. A first generation unit for generating a new line on the basis of;
A second generator that generates a plurality of regions having boundaries that pass through the feature points of the generated new line;
The generated plurality of regions have a display control unit for displaying in a display mode corresponding to the information,
The display processing apparatus, wherein the specific node is a node corresponding to a centroid of the plurality of regions, and the other node is a plurality of outer peripheral nodes included in an outer periphery of the plurality of regions .

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