JP2000057379A - Three-dimensional cad(computer aided design) and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce quantity of data to which access is made by properly using image information viewed from a fixed angle and information to be viewed from an optional angle at a proper place. SOLUTION: A three-dimensional shape information creating means 13a to create information by which the three-dimensional shape by every component is confirmed from assembly model information created by the three-dimensional CAD, an image creating means 14a to create an image of an assembly model and a link information creating means 16a to create information to be linked with the information by which the three-dimensional shape of the corresponding component is confirmed by every dot of the image are provided in this invention.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an image and a VRM.
The present invention relates to a three-dimensional CAD (design apparatus using a three-dimensional computer) and a recording medium for outputting Internet data, intranet data, and the like linked with an L (virtual reality modeling language) anchor (indicating a link destination).

[0002] Reference to three-dimensional CAD (3D-CAD) data using the WWW (World Wide Web) has become popular, and it is possible to view the shape of a three-dimensional CAD model from any direction without using a 3D-CAD or a dedicated viewer. It is supposed to be. Generally, these are attached to or plugged into a Web browser (also referred to simply as Web), which is a program for displaying WWW pages.

[0003]

2. Description of the Related Art Conventionally, a shape on which an image image is pasted was used to check the shape of a three-dimensional CAD. However, since the shape could not be referred to from an arbitrary direction or could not be viewed in an enlarged manner, a three-dimensional CAD was used. A technique that can confirm the shape has been required. In recent years, this technology has been
It was realized by an interface called L.

This is a file format standardized worldwide and is indispensable for shape recognition. This VRML
The advantage of using is that it is a standard interface that does not depend on 3D-CAD, so it can be easily viewed from any angle with a general Web browser even if it is not a viewer specialized in CAD, simple for display only It has been suggested that the transfer of Web data does not take a long time since the data amount is light (several tenths as compared with CAD data) because only simple data is required.

[0005]

The above-mentioned prior art has the following problems. (1): Although the data volume has been reduced,
This is a value compared to CAD bulk data (raw data).
The value was much larger than the image data used in the past.

(2): Although it depends on the CAD type / product data, the 3D-CAD data for one model usually reaches several hundred MB, and although it is reduced to several tenths, it is necessary for one model. If you try to view all of them, it will be several tens of MB, and the download time from the Web will not only be an unrealistic time for operation, but also if you try to display such large data, the display program is Sometimes it ended abnormally.

The present invention solves such a conventional problem, and can reduce the amount of access data by using image information viewed from a fixed angle and VRML information viewed from an arbitrary angle in the right place at the right time. It is an object of the present invention to shorten transfer time from the Web and easily realize VRML display.

[0008]

FIG. 1 is a diagram illustrating the principle of the present invention. In FIG. 1, 4a is a storage unit, 11 is a control unit, 1
3a is a three-dimensional shape information creating means, 14a is an image creating means, and 16a is a link information creating means.

The present invention is configured as follows in order to solve the above-mentioned conventional problems. (1): three-dimensional shape information creating means 13a for creating information for confirming the three-dimensional shape of each part from assembly model information created by three-dimensional CAD, and image creating means 14a for creating an image of an assembly model. And link information creating means 16a for creating information linked to information for confirming the three-dimensional shape of a corresponding part for each dot of the image.

(2): In the above (1) three-dimensional CAD, the link information creating means 16a creates link information summarized in a polygon when adjacent dots are the same for each dot of the image. I do.

(3) In the above (1) three-dimensional CAD, the link information creating means 16a divides the image into a plurality of rectangles or circles, and sets the inside of the rectangle or circle to the same link destination.

(4): In the (1) three-dimensional CAD, the link information creating means 16a divides the image by a specified number of dots in a lattice matrix.
The link most frequently used within the one section is defined as a representative link.

(5): A three-dimensional shape information creating means 13a for creating information for confirming the three-dimensional shape of each part from the assembly model information created by three-dimensional CAD, and an image creation for creating an image of the assembly model A computer-readable medium storing a program for causing a computer to function as means 14a and link information creating means 16a for creating information linking information for confirming the three-dimensional shape of a corresponding part for each dot of the image. A possible recording medium.

(Operation) The operation based on the above configuration will be described. The three-dimensional shape information creating means 13a creates information for confirming the three-dimensional shape of each component from the assembly model information created by three-dimensional CAD, creates an image of the assembly model by the image creating means 14a, and creates link information. Means 16
In step a, for each dot of the image, information is created that is linked to information for confirming the three-dimensional shape of the corresponding part. For this reason, since the image data is an aggregate of each display dot, it is possible to automatically create data in which a link is attached to information (VRML of the component) that can confirm the three-dimensional shape of the component corresponding to each dot of each image, No matter which point is specified with the mouse etc., it will be linked to the VRML of the corresponding part, and the image and the VRML will be used properly,
The data transfer amount for the three-dimensional shape search can be reduced.

The link information creating means 16a includes:
When adjacent link destinations are the same for each dot of the image, link information summarized in a polygon is created. Therefore, link data can be generated by polygon approximation, and the link data can be reduced (reduced).

Further, the link information creating means 16a
Then, the image is divided into a plurality of rectangles or circles, and the inside of the rectangle or circle is the same link destination. For this reason, it is possible to combine the data in a rectangular or circular area and further reduce the link data.

Further, the link information creating means 16a
The image is divided by a designated number of dots in a lattice matrix, and the most used link destination within the one segment is defined as a representative link. For this reason, it is possible to reduce the link data by grouping at the break of the matrix.

Further, a three-dimensional shape information creating means 13a for creating information for confirming the three-dimensional shape of each part from the assembly model information created by the three-dimensional CAD, and an image creating means for creating an image of the assembly model. A computer-readable recording medium storing a program for causing a computer to function as link information creating means for creating information linked to information for confirming the three-dimensional shape of a corresponding part for each dot of the image And Therefore, by installing the program of the recording medium on a computer, the data transfer amount for the three-dimensional shape search can be reduced.
AD can be provided.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the amount of access data can be reduced by using image information viewed from a fixed angle and VRML information viewed from an arbitrary angle, thereby reducing the transfer time from the Web and the VRML. The display can be easily realized.

In a general shape search, it is common to (1) display an overall external view of a product, (2) select a corresponding part, and investigate the details of each part. In this search, it takes time to use VRML from the first (1), but (1) uses an image and VRM
By using L, the overall data transfer amount can be extremely reduced.

(1) Description of designation of link destination in HTML language The designation of link destination in HTML language will be described. Link destination data is <AREA S> between <MAP ~> sentence and </ MAP> sentence.
HAPE ~> statement. Hereinafter, description will be made with an example.

<MAP NAME = "TEST"> <AREA SHAPE = "rect" COORDS = "10,20 30,40" HREF = "rect.html"> <AREA SHAPE = "rect" COORDS = "50,60 70 , 80 "NOHREF> <AREA SHAPE =" Circle "COORDS =" 100,200 50 "HREF =" circle.html "> <AREA SHAPE =" poly "COORDS =" 100,100 100,200 0,150 "HREF =" poly.html "> </ MAP> The meaning of each line above is as follows.

The link shape is represented by coordinates P1 (x = 10,
y = 20) and P2 (x = 30, y = 40) enclosed in a rectangle (rect) and clicked on the area, "rect.htm
l "is displayed.

The link shape is represented by coordinates P1 (x = 50,
If nothing is clicked in the area (rect) enclosed by P2 (x = 70, y = 80) and P2 (x = 70, y = 80), nothing is done (NOHREF).

The link shape is a circle (center point (x = 10
0, y = 200) radius = 50) When the area is clicked, "circle.html" is displayed. The link shape is specified point group (in this case, three points (10
0,100), (100,200), (0,150))
If you click inside the polygon area surrounded by
l "is displayed.

In the case of pasting an image, the map linked by clicking and displaying "image.gif" such as <IMG SRC = "image.gif" usemap = "test"> is "test "And associate it with MAP NAME.

(2): Description of Three-Dimensional Data and Image FIG. 2 is an explanatory diagram of a three-dimensional model and an image.
(A) illustrates the relationship between the three-dimensional model and the image, FIG.
(B) is a description of the surface F viewed from the front.

In FIG. 2A, the 3D-CAD models A and B are projected on a plane F orthogonal to the angle from the viewpoint VP. As described above, an image close to the viewpoint VP is displayed, and is not the entire projection area of each model (the area of the model A and the area of the model B change depending on the time). In some cases, it is completely hidden, and its own area disappears (the area of the model C is completely hidden).

In FIG. 2B, an arbitrary angle (view point V
P), the three-dimensional assembly model (in this case, model A,
An image display in the case of performing Web output with a model B) is shown. However, when displaying this in VRML,
Model A and Model B VRML files must be loaded, which is time consuming for large data processing.

Therefore, fixed angle image data prepared in advance and individual VRMLs are prepared, and the first Web
In the display specification of b, an image is displayed, and then the VRML of the individually specified component (model A or the like) is displayed, whereby the apparent processing time can be dispersed. Data linked to the VRML of the corresponding part can be output as the image display data.

(3): Description of the relationship between the three-dimensional CAD that outputs Web data and the WWW browser FIG. 3 is an explanatory diagram of the relationship between the three-dimensional CAD and the WWW browser. In FIG. 3, three-dimensional CAD (3D-CAD)
1 displays the 3D-CAD data stored in the storage unit 3 on a dedicated 3D-CAD screen. Also, three-dimensional CAD
1 outputs the image display data and the data linked to the VRML of the corresponding part to the storage unit 4 as Web data (data for the Internet). The user can use this We
b data is output to the browser screen 6 via the WWW browser 5, and the 3D-CAD model from any direction can be viewed.

(4): Description of three-dimensional CAD for outputting Web data FIG. 4 is an explanatory diagram of three-dimensional CAD for outputting Web data. In FIG. 4, the left side of the dotted line shows the inside of the three-dimensional CAD, and the right side shows the outside. Inside the three-dimensional CAD, a control unit 11, a 3D read control unit 12, a VRML output control unit 13, an image output control unit 14, a link merge process 15, an HTML creation control unit 16, an assembly information read unit 17, a component information read Unit 18, VRML output unit 19, image output unit 20, article correspondence information output unit 2 for each dot
1, link table read processing unit 22, HTML output unit 2
3. A correspondence table 24 for each dot and article is provided.

Outside the three-dimensional CAD, assembly information 25 as 3D-CAD information, part shape information 26 as 3D-CAD information, VRML 27 for each part, image 28 for each scene, HTML 29 for each scene And other storage means.

(Explanation of Operation) The operation of the three-dimensional CAD will be described from (1) to
Explanation will be given according to (8). (1) The control unit 11 transmits the 3D data to the assembly information reading unit 17 and the component information reading unit 18 via the 3D reading control unit 12.
Read assembly information 25 and part shape information 26 which are CAD information (data).

(2) Based on the information obtained in the above (1), the control unit 11 uses the VRML output control unit 13 to control the VRM of each component.
An instruction is issued to the VRML output unit 19 to automatically output the L information to the VRML, and the VRML 27 for each component is output.

These are the three-dimensional shape files as seen in the 3D viewer on the Web. (3) In addition to the output in (2) above, the control unit 11 sends an instruction to the image output control unit 14 to create image information.

(4) The image output control unit 14 converts the image information viewed from each direction into a generalized format (bmp, tiff, gif, jpeg ...) from the image output unit 20 for each scene. Create 28.

This is a still image file for each scene viewed in the Web image viewer. (5) The image output control unit 14 outputs the image information of the above (4), and at the same time, determines what article is displayed for each dot position on each image via the article correspondence information output unit 21 for each dot. Then, it is recorded in the “correspondence table 24 for each dot and article”.

This information is similar to the data shown in FIG. (6) Based on the “correspondence table 24 for each dot and article” output in the above (5), the link merge processing 15 shown in FIG.
10 to update the “correspondence table 24 for each dot and article”.

(7) The control unit 11 passes control to the HTML creation control unit 16 when the above (6) is completed. (8) The HTML creation control unit 16 stores the contents of the “correspondence table 24 for each dot and article” in the link table read processing unit
Read in 2 and convert to anchor data string, HTML
Output to the “HTML 29 for each scene” via the output unit 23.

This is a Web HTML file. (5): Description of VRML anchor setting of display dots a) Description of VRML anchor setting example of each display dot FIG. 5 is an explanatory diagram of VRML anchor setting of each display dot, and FIG. FIG. 5B illustrates an example of data.

FIG. 5A shows an image of rectangular components A and B. For example, the part B has dots (64, 72), (65, 72), (66, 7)
2), (67, 72), (64, 73), (65, 7)
3), (66, 73) and (67, 73).

In FIG. 5B, rectangular parts A and B
This is data in which a link is attached to the VRML of a component corresponding to each display dot (each point) of (image). this is,
It is automatically created by the HTML creation control unit 16 for three-dimensional CAD. For example, in the data example at the top of the figure,
If dot (64, 72) is clicked, VR of part B
It is instructing to load ML.

B) Description of an example in which each dot is combined to reduce link destination data FIG. 6 is an explanatory diagram of VRML anchor setting in which each display dot is combined, and FIG.
(B) is a description of an example of data.

FIG. 6A shows an image of rectangular components A and B. This is the same as FIG. In FIG. 6B, in the method described with reference to FIG. 5, it is necessary to specify for each display dot, and the link data becomes enormous. Therefore, when adjacent link destinations are the same, the link destinations are put together. For example, in the data example at the top of the figure, the dot (64, 72) and the dot (67, 73)
Indicates that the VRML of part B is to be loaded when the user clicks in the area with a rectangle (rect) surrounded by.

C) Description of how to summarize with polygons In an actual example, a rectangle is not formed as in the example of FIG.
For this reason, the link destinations are grouped by dividing into polygons.

FIG. 7 is an explanatory diagram (part 1) of a method of summarizing polygons, and FIG. 7 (a) is an illustration of an image diagram.
(B) is a description of a polygon division example (1). FIG. 8 is an explanatory diagram (part 2) of a method of summarizing polygons.
8A illustrates a polygon division example (2), and FIG. 8B illustrates a polygon division example (3). FIGS. 9A and 9B are explanatory diagrams (part 3) of how polygons are grouped. FIG. 9A is a diagram illustrating an image diagram, and FIG. 9B is a diagram illustrating a polygon division example (4).

In FIG. 7 (a), polygonal parts A and B
In the image, a part B is shown by oblique lines and a part A is shown by a lattice. Description of a case where each component A and B is divided into polygons and link destinations are combined In FIG. 7B, image data is divided into each component A and B into polygons and link destinations are collected. For example, the part B is divided into four polygons because the part A is inside.

Description of the case where the most frequently used link destination in the area for every several dots is the representative link. In FIG. 8A, the area for every several dots is used instead of each dot so as to further reduce the data. The link data is created such that the most frequently used link destination becomes the representative link. For example, the dots of the small (two dots) part A surrounded by the part B in FIG. 7B are reduced to the link data as the part B (the part A is deleted) as shown in FIG. 8A.

Description of case where link format is simplified by combining regions such as rectangles and circles In FIG. 8B, all image data can be approximated by rectangles and simplified to reduce link data. .
In addition, it is also possible to put together not a rectangle but a circle, and it is also possible to put together using a rectangle and a circle.

Description of a case in which a matrix is divided by a predetermined number of dots into a grid matrix and linked to the most used component in the matrix. In FIG. 9A, images of polygonal components A and B are shown. 7A is the same as FIG. 7A, indicating that it is divided by a grid-like matrix of 9 dots.

In FIG. 9 (b), the image data of FIG. 9 (a) is divided by a grid-like matrix of 9 dots, and linked so as to link to the part having the most used area in this matrix. Create data. As a result, the part A is divided into two matrices and the part B is divided into ten matrices.

(6): Description of 3D-CAD screen FIG. 10 is an explanatory diagram of the 3D-CAD screen. In FIG. 10, an example of menu arrangement in a three-dimensional CAD is shown on the 3D-CAD screen. Each component is displayed on the left side, and input, output, CAD, external, IGES (external file), DXF (external file), and WWW indicating sections are provided on the right.

(7): Description of a specific example of a link FIG. 11 is an explanatory diagram of a specific example of a link. In FIG. 11, an image is shown at the upper left. In this image, rectangular frames A, B, C, D, E, and F are provided. By clicking inside the rectangular frames A, B, C, D, E and F, VRML of the corresponding part is loaded,
The VRML screen is displayed.

For example, if the user clicks in the rectangular frame A, a VRML screen (A) indicated by an arrow is displayed. When the user clicks in the rectangular frame B, a VRML screen (B) indicated by an arrow is displayed. When the user clicks outside the rectangular frames A, B, C, D, E, and F, the entire VRML screen (H) is displayed.

In the above embodiment, the link from the image to the part VRML has been described for convenience of explanation. However, in the case of a large-scale actual product, the unit is disassembled from the product assembly state to the unit and further to its child unit. In many cases, the parts reach the parts after passing through the tree structure. For this reason, it is desirable to actually link the product image information to the unit image, and to link the final unit image to the VRML of the component.

Further, it is more practical to automatically create image information viewed from several directions as image information in each stage, and to enable display selection at the time of retrieval.

As described above, in the three-dimensional shape retrieval system using the Internet, since the data transfer amount is reduced, it is possible to increase the response speed and reduce the network load.

(8): Description of installation of program 3D shape information creating means 13a, image creating means 14
a, link information creating means 16a, 3D read control unit 12,
VRML output control unit 13, image output control unit 14, link merge processing 15, HTML creation control unit 16, assembly information reading unit 17, component information reading unit 18, VRML output unit 19, image output unit 20, articles for each dot Correspondence information output unit 21, link table read processing unit 22, H
The TML output unit 23 and the like can be constituted by a program, executed by the main control unit (CPU), and stored in the main memory. These programs are general,
It is processed by a data processing device (computer) such as a personal computer and a workstation.
The computer is configured by hardware such as a main control unit, a main memory, a file device such as a hard disk, a display device, and an input device such as a keyboard.

The program of the present invention is installed on this computer. This installation is performed on portable recording (storage) media such as floppy disks, magneto-optical disks, etc.
These programs are stored and installed in a file device provided in the computer via a drive device for accessing a recording medium provided in the computer or via a network such as a LAN. You. Then, program steps necessary for processing are read out from the file device to the main memory, and are executed by the main control unit.

[0061]

As described above, the present invention has the following effects. (1): Information for confirming the three-dimensional shape of each part is created from the assembly model information created by the three-dimensional CAD by the three-dimensional shape information creating means, an image of the assembly model is created by the image creating means, and a link is created. The information creating means creates, for each dot of the image, information that links to the information that can confirm the three-dimensional shape of the corresponding part. Therefore, information that can confirm the image and the three-dimensional shape (VRML) is used properly. The data transfer amount for the original shape search can be reduced.

(2): When adjacent link destinations are the same for each dot of the image by the link information creating means, link data is generated by polygon approximation to create link information summarized by polygons. To reduce (reduce) link data
can do.

(3): The link information creating means divides the image into a plurality of rectangles or circles, and the rectangles or circles are linked to the same link destination. can do.

(4): The link information creating means divides the image by a specified number of dots in a grid-like matrix, and delimits the matrix in order to make the most used link destination within the one partition a representative link. And link data can be further reduced.

(5): Three-dimensional shape information creating means for creating information for confirming the three-dimensional shape of each part from the assembly model information created by three-dimensional CAD, and image creating means for creating an image of the assembly model And a computer-readable recording on which a program for causing a computer to function is created as link information creating means for creating information linking to information for confirming the three-dimensional shape of a corresponding part for each dot of the image. Since the medium is used as a medium, by installing the program of the recording medium into a computer, a three-dimensional CAD that can reduce the amount of data transferred for three-dimensional shape search can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram of a three-dimensional model and an image according to the embodiment.

FIG. 3 is an explanatory diagram showing a relationship between a three-dimensional CAD and a WWW browser according to the embodiment.

FIG. 4 is an explanatory diagram of a three-dimensional CAD that outputs Web data according to the embodiment.

FIG. 5 is an explanatory diagram of a VRML anchor setting of each display dot in the embodiment.

FIG. 6 is a diagram illustrating a V that summarizes display dots according to the embodiment.
FIG. 9 is an explanatory diagram of RML anchor setting.

FIG. 7 is an explanatory diagram (part 1) of how polygons are grouped in the embodiment;

FIG. 8 is an explanatory diagram (part 2) of a method of summarizing polygons in the embodiment.

FIG. 9 is an explanatory diagram (part 3) of how polygons are grouped in the embodiment.

FIG. 10 is an explanatory diagram of a 3D-CAD screen according to the embodiment.

FIG. 11 is an explanatory diagram of a specific example of a link in the embodiment.

[Explanation of symbols]

 4a storage means 11 control unit 13a three-dimensional shape information creating means 14a image creating means 16a link information creating means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 15/60 614A F-term (Reference) 5B046 CA06 DA02 FA06 FA18 GA01 HA05 5B050 BA07 BA13 BA18 EA19 EA28 GA06 5B075 KK07 KK13 KK25 KK34 ND06 ND20 PQ02 PQ13 PQ42 PQ75 UU21

Claims (5)

[Claims] 1. A three-dimensional shape information creating means for creating information for confirming a three-dimensional shape of each part from assembly model information created by three-dimensional CAD, an image creating means for creating an image of an assembly model, A three-dimensional CAD, comprising: link information creating means for creating information linked to information for confirming the three-dimensional shape of a corresponding part for each dot of the image. 2. The tertiary information according to claim 1, wherein said link information creating means creates link information summarized by a polygon when adjacent dots are the same for each dot of said image. Former CAD. 3. The three-dimensional CAD according to claim 1, wherein the link information creating unit divides the image into a plurality of rectangles or circles, and sets the same link destination within the rectangle or circle. 4. The link information creating means is characterized in that the image is divided by a specified number of dots in a lattice matrix, and a link most frequently used in the one segment is set as a representative link. The three-dimensional CA according to claim 1
D. 5. A three-dimensional shape information creating means for creating information for confirming a three-dimensional shape of each part from assembly model information created by three-dimensional CAD, an image creating means for creating an image of an assembly model, A computer-readable recording medium having recorded thereon a program for causing a computer to function as link information creating means for creating information linking information for confirming the three-dimensional shape of a corresponding part for each dot of the image.