KR20030066863A - A system for VRML edit and a method thereof - Google Patents

Abstract

PURPOSE: A system and a method for editing the VRML(Virtual Reality Modeling Language) are provided to enable a user to make a 3D(Dimensional) virtual reality space by using the VRML. CONSTITUTION: A VRML encoder(100) loads a VRML file in a VRML editor(300), checks grammar, and collects desired information. A device controller(200) links the external devices such as a space mouse, a data grove, and motion capture with the VRML. The VRML editor(300) edits the VRML file read by the VRML encoder(100). A VRML customizer(400) optimizes and publishes a completed 3D VRML source. A library(500) provides the basic data or the frequently used data for making the 3D space or an object by using the VRML.

Description

A system for VRML edit and a method

The present invention relates to a VRML (Virtual Reality Moldeling Language) editing system and method, and more particularly, to a VRML editing system and method for allowing anyone to easily create a 3D virtual reality space.

The construction of the three-dimensional virtual reality space is a technology to escape the two-dimensional information expression method using the hypertext markup language (HTML) based on the world wide web (WWW) and to express the existing Internet service as the human-centered three-dimensional information. Since its inception, VRML is now the standard for defining three-dimensional space on the Internet.

However, VRML cannot be utilized because it can be utilized only with considerable experience and knowledge of 3D computer graphics.

The authoring tool of virtual reality space using VRML has been recently developed, but in order to obtain sophisticated images by using it, it must be rendered in 3D dedicated graphic tool and converted to VRML format. Therefore, the user has to learn too much to create a three-dimensional virtual reality space using a conventional authoring tool, even if the user learns all of the functions, there is a problem that the final result is different depending on the user's ability.

The present invention is to solve such a problem, it is an object of the present invention to provide a VRML editing system and method that allows a user to easily create a three-dimensional virtual reality space using VRML.

1 is a schematic diagram of a VRML editing system according to an embodiment of the present invention.

2 is a block diagram showing the detailed structure of a VRML editor according to an embodiment of the present invention.

3 is a block diagram illustrating a detailed structure of a VRML encoder according to an embodiment of the present invention.

4 is a flowchart illustrating an operation of a VRML encoder according to an embodiment of the present invention.

5 is a block diagram showing a detailed structure of a source editor according to an embodiment of the present invention.

6 is a flowchart illustrating an operation of a source editor according to an exemplary embodiment of the present invention.

7 is a block diagram illustrating a detailed structure of an object generator according to an embodiment of the present invention.

8 is a flowchart illustrating an operation of an object generator according to an embodiment of the present invention.

9 is a block diagram illustrating a detailed structure of a texture editor and a customizer according to an embodiment of the present invention.

10 is a flowchart illustrating an operation of a texture editor and a customizer according to an exemplary embodiment of the present invention.

11 is a block diagram showing the detailed structure of the animator according to an embodiment of the present invention.

12 is a flowchart illustrating the operation of the animator according to an embodiment of the present invention.

13 is a block diagram showing the detailed structure of a multimedia mixer according to an embodiment of the present invention.

14 is a flowchart illustrating the operation of the multimedia mixer of the present invention.

FIG. 15 is a block diagram illustrating a detailed structure of property management according to an embodiment of the present invention.

16 is a flowchart illustrating an operation of attribute management according to an embodiment of the present invention.

17 is a block diagram illustrating a detailed structure of a device controller according to an embodiment of the present invention.

18 is a flowchart illustrating an operation of a device controller according to an embodiment of the present invention.

19 is a block diagram showing the detailed structure of a library according to an embodiment of the present invention.

20 is a block diagram illustrating a detailed structure of a VRML customizer according to an embodiment of the present invention.

21 is a flowchart illustrating an operation of a VRML customizer according to an embodiment of the present invention.

In order to achieve the above object, the VRML editing system of the present invention includes a VRML encoder, a device controller, a VRML editor, a VRML customizer, and a library.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a VRML editing system according to an embodiment of the present invention.

As shown in FIG. 1, the VRML editing system of the present invention includes a VRML encoder 100, a device controller 200, a VRML editor 300, a VRML customizer 400, and a library 500.

The VRML encoder 100 loads a VRML file into an editor, checks a grammar, and collects necessary information.

The device controller 200 performs a function of allowing external devices such as a space mouse, data globe, and motion capture to interoperate with VRML.

The VRML editor 300 performs a function of editing a VRML file read by the VRML encoder 100.

The VRML customizer 400 performs a function of optimizing and publishing the completed 3D VRML source.

The library 500 performs a function of providing basic data or frequently used data required when manufacturing a 3D space or an object using VRML.

2 is a block diagram showing the detailed structure of a VRML editor according to an embodiment of the present invention.

As shown in FIG. 2, the VRML editor 300 includes a viewer, a property management, a 3D editor, a source editor, and a syntax checker. .

The three-dimensional editor includes a multimedia mixer, a navigator, an animator, a texture editor and customizer, an object creator & re-modeler. do.

3 is a block diagram illustrating a detailed structure of a VRML encoder according to an embodiment of the present invention.

As shown in FIG. 3, the VRML encoder 100 of the present invention includes a source importer 110, a compression processor 120, a grammar checker 130, and a scene tree generator 140.

The source importer 110 reads a VRML source into a VRML editor. VRML files store texture and multimedia files in files other than the same file. When there are many external files referred to by these VRML files, especially when the files exist on the web, it is not easy for a user to download all the files. The source importer 110 performs a function of downloading all related files with a user's permission when there are many external files or when the related files exist on the web.

The compression processor 120 performs a function of automatically decompressing the VRML files, if the compressed file is examined by examining the file header even if the user does not separate the compression. VRML is a standard for creating 3D virtual reality space on the web, so most files are compressed and distributed because of the large file size.

The grammar checker 130 performs a function of checking whether the VRML of the source conforms to the grammar.

The scene tree generator 140 finds elements of a scene graph having a hierarchical structure and generates a tree-shaped material. This not only makes it easy for the user to understand the overall structure of the VRML file, but also facilitates the search, modification or deletion of parts performing specific functions, and provides excellent functions in group work.

The scene graph is one of the components of a VRML file consisting of a header, a scene graph, prototypes, and an event / routing. The scene graph includes nodes and nodes describing the characteristics of the objects. In order to represent things, we need nodes with auditory and visual elements and nodes that participate in mechanisms for generating and communicating events. These nodes are connected in a hierarchical structure within the scene graph.

In addition, the scene tree generated by the scene tree generator 140 continuously displays information on nodes and objects that are selected, generated, or modified in a source editor or a 3D editor. By providing a user convenience.

4 is a flowchart illustrating an operation of a VRML encoder according to an embodiment of the present invention.

First, the VRML source is loaded into the VRML editor (step 410). At this time, the file on the computer as well as the file existing online can be read by entering the URL. When you load a VRML source, it loads the associated texture if there is one.

If the file read by the VRML editor is compressed, the compression processor 120 decompresses and restores the original source (step 420).

The grammar checker 130 checks whether the source matches the grammar of the VRML (step 430). If there is a grammatical error, it is converted into a three-dimensional form that can be expressed.

The scene tree generator 140 creates a scene tree by finding a tree structure of each object by analyzing a source.

When grammar checking and source analysis are complete, the source is ready for editing (step 450).

5 is a block diagram showing a detailed structure of a source editor according to an embodiment of the present invention.

The source editor performs a function of allowing a user to directly modify a source discharged through the VRML encoder.

As shown in FIG. 5, the source editor of the present invention uses an inputable code indicator 510, a grammar checker 520, an error indicator 530, a property indicator 540, and a three-dimensional synchronizer 550. Include.

The inputtable code indicator 510 performs a function of displaying codes that can be input at the current input position to the user.

In general, the provided source editor leaves all the input to the user. As a result, users make a lot of errors when coding the source, and spend a lot of time looking for errors. The inputtable code indicator 510 is to solve this problem. For example, in the case of a shape node in VRML, the shape word is followed by an open brace "{" followed by an appearance or geometry followed by the last closed brace "}". Based on this regularity, when the user enters the shape, the information to be displayed next is displayed in order so that the user can code correctly even if they do not know the VRML syntax completely.

The grammar checker 520 performs a function of checking whether a code input by a user conforms to a grammar.

The error indicator 530 performs a function of displaying the grammar checker 520 so that a user can know when there is a wrong input as a result of the grammar checker 520. When an error occurs, the error indicator 530 displays an error message next to a mouse pointer, a status bar, and underlines an error word so that the user can know it.

The attribute indicator 540 displays all attributes and values assigned to attributes that the node currently working on may display in the attribute display window. These indications can provide the user with accurate information about the node they are working on, and provide different ways of coding.

An example of coding a cone node representing a cone is as follows. The cone node consists of a bottom radius representing the radius of the bottom circle of the cone, a height representing the height of the cone, a side representing the side of the cone and a bottom representing the bottom of the cone.

If you want to create a cone with a radius of 3, a height of 4, and a side and bottom face, you should code:

Cone {bottomRadium 3 height 4 side TRUE bottom TRUE}

In the past, the user had to input all of the above contents, but when the user inputs the cone to the edit window using the property indicator 540, the property indicator 540 displays the property that the cone node may have on the screen. The user only needs to change the default value of this property to the desired value.

Thus, unlike the existing editor, the source editor can minimize input through the user's keyboard and minimize errors in coding.

The 3D synchronizer 550 performs a function of synchronizing a node with a 3D viewer window when one complete node is made without an error or when an error is corrected.

6 is a flowchart illustrating an operation of a source editor according to an exemplary embodiment of the present invention.

First it waits for input of code by the keyboard (step 610).

When the user enters a code, the inputtable code indicator 510 finds and displays all types of codes that can be input at the current location (step 620). A drop-down method may be used to show a code that can be input to the user.

It is determined whether the content input by the user is completed with a word (step 630). If it is determined that the content input by the user is not completed with words, steps 610 and 620 are repeated.

If it is determined that the content input by the user is completed with a word, the grammar checker 520 checks whether the completed word matches the grammar (step 640).

If the grammar checker 520 determines that there is an error as a result of the grammar check, the error indicator 530 notifies the user of the error and displays the wrong word so that the user can know the wrong word (step 652). Error messages can be displayed next to the mouse pointer, in the status bar, and incorrect words can be underlined in red.

If the user makes a correction by referring to the error message, the steps 640 and 650 are repeated.

If the grammar checker 520 determines that there is no error as a result of the grammar checker 520, the 3D synchronizer 550 synchronizes the node with the 3D viewer window (step 660).

The following steps may be added during the steps 610 to 660. Although illustrated in FIG. 6 as related to step 650 for convenience of description, the next two steps may be executed at any step if editing using a source editor.

The source editor waits for an event whether the user clicks on a specific word or a specific area using a mouse while the user is editing (step 670).

When the user clicks on a particular word or region, all attributes of the node belonging to the current location are displayed and the scene tree moves to the location of the current node to show (step 680).

7 is a block diagram illustrating a detailed structure of an object generator and a remodeler according to an embodiment of the present invention.

The object creator & re-modeler creates and modifies 3D objects.

As shown in FIG. 7, the object generator and remodeler of the present invention includes a target selector 710, an object generator 720, an object attribute changer 730, and an object library 740.

The target selector 710 performs a function of providing information about an object and a node that the user selects or is currently working on.

The object generator 720 performs a function of generating an object determined by a user in a three-dimensional and two-dimensional source editor. At this time, the basic coordinates are generated based on the current viewpoint, and information about the created object is added to property management and scene tree.

The object property changer 730 allows a user to change various properties related to the current object, that is, all properties that can be changed, such as position, rotation, size, color, texture, sound, and light. It performs the function that makes it possible.

The object library 740 performs a function of providing an object that is frequently used in addition to the basic figure provided by the VRML.

VRML has nodes that can create 10 geometric shapes, but it requires many more nodes to construct the actual virtual space. The object library 740 pre-creates and stores an object of a frequently used type and provides it when the user needs it so that the user can make a desired shape with only minor modifications.

Materials stored in the object library 740 may be updated through a web site.

8 is a flowchart illustrating operations of an object generator and a remodeler according to an embodiment of the present invention.

The user selects a required object from among objects provided in the VRML or stored in the object library 740 (step 810).

The object generator 720 generates objects selected by the user in the 3D and 2D source editors (step 820). At this time, the basic coordinates are generated based on the current viewpoint, and the information about the created object is added to the property management and the scene tree.

The object attribute changer 730 changes various attributes related to the object as desired by the user.

9 is a block diagram illustrating a detailed structure of a texture editor and a customizer according to an embodiment of the present invention.

The texture editor and the customizer perform a function of modifying and optimizing a texture mapped or mapped to an object.

As shown in FIG. 9, the texture editor and customizer of the present invention includes an image importer 910, an object selector 920, an image editor 930, an image optimizer 940, and an image library 950. .

The image importer 910 imports an image format into an editor. The image importer 910 generally supports not only JPEG and GIF but also other file formats.

The target selector 920 performs a function of providing information on an object and a node that the user selects or is currently working on.

The image editor 930 performs a function of allowing a user to modify an image. Since it is more effective to leave the image correction to a specialized tool, the image editor 930 may provide only the minimum function necessary for image correction rather than supporting various functions.

In addition, the image editor 930 performs a function of newly creating or modifying an animation function with respect to the GIF file format.

The image optimizer 940 is closest to the original image and has a high compression rate to generate an image having a small size, thereby minimizing the overall file size.

The image library 950 stores frequently used images and provides them when the user needs them so that the user can make a desired shape with only minor modifications. Materials stored in the image library 950 may be updated through a web site.

10 is a flowchart illustrating an operation of a texture editor and a customizer according to an exemplary embodiment of the present invention.

The image importer 910 imports various image formats such as GIF and JPEG into the editor (step 1010). If you enter a URL address, the image is downloaded from the site corresponding to the entered address and imported into the editor.

The user modifies the image imported by the image importer 910 into a desired shape using the image editor 930 (step 1020).

When the user finishes editing the image, the image optimizer 940 optimizes the image file to a file capable of maximum image quality with a minimum size (step 1030).

The image file optimized by the image optimizer 940 is stored in a designated folder (step 1040). If the designated folder is a URL address, upload it to the site corresponding to the URL address.

The optimized image is mapped to the selected object (step 1050). It also synchronizes two-dimensional sources, property management, and the scene tree.

11 is a block diagram showing the detailed structure of the animator according to an embodiment of the present invention.

The animator creates or modifies animations of objects, lights, and viewpoints in three-dimensional space. In VRML, you can change state and move objects along the timeline.

However, most of the currently provided editors use a method of recording a coordinate by inputting a variable value by using a keyboard or moving an object with a mouse. However, when recording coordinates using only the keyboard and mouse, it is very difficult to realize smooth and detailed movement in three-dimensional space. Because a keyboard or mouse is a device that moves coordinates in two dimensions rather than three dimensions.

However, the animator of the present invention can generate motion by connecting three-dimensional related devices recognized by the device controller to an object to create a motion.

As shown in FIG. 11, the animator of the present invention includes an object selector 1110, an external device selector 1120, an object movement and state change recorder 1130, an illumination movement and state change recorder 1140, and a viewpoint movement recorder 1150. ), Condition generator 1160, script editor 1170, animation generator 1180, and animation library 1190.

The target selector 1110 performs a function of providing information about an object and a node that the user selects or is currently working on.

The external device selector 1120 allows a user to select a device for generating an animation. The user selectable device is basically provided with a keyboard and a mouse. In addition, a joystick, a data glove, a motion capture, and the like are provided.

The object movement and state change recorder 1130 generates a time line and records a movement and state change of an object input from the selected device.

The illumination movement and state change recorder 1140 generates a time line and records a change in the movement and state of illumination input from the selected device.

The viewpoint movement recorder 1150 generates a time line and records a movement of a viewpoint input from a selected device.

The condition generator 1160 performs a function of generating a condition in which a current animation will occur. That is, the condition generator 1160 shows to the user all sensors that can act as triggers of the currently created or modified animations, and the user only needs to drag the mouse to make a connection with each other. In addition, when there is a required sensor, the condition generator 1160 may generate the sensor without passing through the object generator.

The script editor 1170 performs a function of allowing a user who wants a more complicated and detailed operation to directly modify a VRML script, a JAVA script, and the like.

The animation generator 1180 performs a function of generating and adding an animation to the current job. The generated animation is synchronized to two-dimensional sources, property management, and the scene tree.

The animation library 1190 stores frequently used animations and provides them when the user needs them so that the user can apply them to the object with only minor modifications. Materials stored in the animation library 1190 may be updated through a web site.

12 is a flowchart illustrating the operation of the animator according to an embodiment of the present invention.

The user selects a target to generate an animation (step 1210).

The user selects an external device to be used by using the external device selector 1120 (step 1220). User-selectable external devices include joysticks, data gloves, and motion capture.

The object movement and state change recorder 1130 generates a time line and records the movement and state change of the object input from the device selected by the user (step 1230).

In addition, the illumination movement and state change recorder 1140 creates a time line and records the movement and state change of illumination input from the device selected by the user (step 1240).

The viewpoint movement recorder 1150 generates a time line and records movement of a viewpoint input from a device selected by a user (step 1250).

The condition generator 1160 generates a condition in which the current animation will occur (step 1260).

If there is a lack or a lack in the automatically generated animation, the user corrects using the script editor 1170 (step 1270).

When all of the above tasks are completed, the animation generator 1180 generates and adds an animation to the current task (step 1280). The generated animation is synchronized to two-dimensional sources, attribute management, and the scene tree.

13 is a block diagram showing the detailed structure of a multimedia mixer according to an embodiment of the present invention.

Multimedia mixer plays a role of inserting the multimedia source provided by VRML into VRML. Sound and movie are inserted through the multimedia mixer.

As shown in FIG. 13, the multimedia mixer of the present invention includes an object selector 1310, a source selector 1320, a condition generator 1330, a multimedia mixer 1340, and a multimedia library 1350.

The target selector 1310 performs a function of providing information about an object and a node that the user selects or is currently working on.

The source selector 1320 selects and connects a sound and a movie supported by the multimedia mixer.

The condition generator 1330 generates a condition necessary to play a sound or a movie. If there is an event that can be linked, this is displayed to help the event connection, and in case of additionally necessary event, it automatically creates a sensor.

The multimedia mixer 1340 inserts multimedia into the currently selected object and node.

The multimedia library 1350 stores frequently used multimedia sources and provides them when necessary, so that the user can easily insert multimedia. Materials stored in the multimedia library 1350 may be updated through a website.

14 is a flowchart illustrating the operation of the multimedia mixer of the present invention.

The user selects a target to mix the multimedia (step 1410).

The user selects a sound, a movie, etc. to be inserted into an object and a node using the source selector 1320 (step 1420).

When the user selects a source, the condition generator 1330 generates a condition for reproducing (step 1430). At this time, if there are other events that can be linked, it is displayed to the user, and if necessary events are automatically generated.

The multimedia mixer 1340 inserts the multimedia into the object and the node selected by the user and synchronizes the multimedia to the two-dimensional source, the characteristic management, and the scene tree (step 1440).

FIG. 15 is a block diagram illustrating a detailed structure of property management according to an embodiment of the present invention.

Every node in VRML consists of fields and events, and the properties of nodes are determined by these fields and event values. The attribute management performs a function of managing field and event values of a node.

As shown in FIG. 15, the attribute management of the present invention includes a target selector 1510, a node attribute extractor 1520, an attribute indicator 1530, and a synchronizer 1540.

The target selector 1510 performs a function of providing information about an object and a node that the user selects or is currently working on.

The node attribute extractor 1520 performs a function of extracting an attribute of a currently selected node. If there is no property in the currently selected node, the default value is used.

The property indicator 1530 displays the extracted properties on the screen in a state that a user can modify.

The synchronizer 1540 performs a function of changing a property of a corresponding node and synchronizing it with a 3D source when a user modifies the property of a node.

16 is a flowchart illustrating an operation of attribute management according to an embodiment of the present invention.

The user selects an object to be worked on (step 1610).

When the user selects a target, the node attribute extractor 1520 extracts attributes of the selected node (step 1620). If there is no property in the selected node, the default value is used.

When the node attribute extractor 1520 extracts the attributes of the node, the attribute indicator 1530 displays the extracted attributes on the screen in a form that can be modified by the user (step 1630).

The node attribute indicator 1530 determines whether the user has modified the attribute of the node (step 1640). If it is determined that the user has not changed the attributes of the node, the operation of attribute management is terminated. If it is determined that the user has changed the attributes of the node, the modifications made by the user are reflected in the attributes of the node and synchronized with the 3D source. (Step 1650).

17 is a block diagram illustrating a detailed structure of a device controller according to an embodiment of the present invention.

Existing VRML editors do not provide an interface to external devices. By default, a keyboard and mouse are provided, but no interface with other 3D equipment is provided. In addition, only keyboard and mouse were available for navigation in 3D space made in VRML.

However, the device controller of the present invention provides an interface for using equipment such as a space mouse, a data glove, a motion capture, and the like as well as a keyboard and a mouse, so that a more realistic animation can be produced. In addition, when the navigation is connected to an external device, various external devices can be linked to VRML in a web browser using a web driver provided by a library.

As shown in FIG. 17, the device controller of the present invention includes a device finder 1710, a device selector 1720, a device controller 1730, a device mapper 1740, and a device controller library 1750.

The device finder 1710 checks the status of devices currently connected to a computer and performs a function of indicating available devices.

The device selector 1720 provides a function that allows a user to select a device.

The device controller 1730 performs a function of generating a separate control routine when detailed control of a device selected by a user is required.

The device mapper 1740 connects a device selected by a user to a viewpoint or an object.

The device controller library 1750 supports a controller for controlling various external devices.

18 is a flowchart illustrating an operation of a device controller according to an embodiment of the present invention.

The device finder 1710 searches for a device currently connected to a computer and indicates a device that can be used (step 1810).

The user selects a device to be used from among the devices indicated by the device searcher 1710 using the device selector 1720 (step 1820).

If the device selected by the user requires detailed control, the device controller 1730 sets and controls a separate control routine (step 1830).

The device mapper 1740 connects the device selected by the user to the viewpoint or the object (step 1840).

19 is a block diagram showing the detailed structure of a library according to an embodiment of the present invention.

The library performs a function of storing and providing basic data or frequently used data necessary for manufacturing a three-dimensional space and an object.

Currently, libraries provided by VRML editors do not provide various objects to meet the needs of many users.

In order to solve this problem, the library of the present invention can add data desired by the user directly to the library, and by using the Internet, many users can share a large amount of data to create a library that suits the user's taste. .

As shown in FIG. 19, the library of the present invention includes an integrated library 1910, a user-defined library 1920, and an Internet library 1930.

The integrated library 1910 is stored for each texture, object, multimedia, animator, and device controller, and the stored data can be called and used in a required module. The detailed description of each library has been described in detail with reference to FIGS. 7, 9, 11, 13, and 17, and thus the description thereof is omitted here.

The user defined library 1920 stores data normalized by the user.

The Internet library 1930 is capable of integrating various materials provided through the Internet into its own library, and the library that he intends to publicize is open to the Internet to form a library community.

20 is a block diagram illustrating a detailed structure of a VRML customizer according to an embodiment of the present invention.

Many existing VRML sources have a lot of unnecessary parts added to them, resulting in a large file size and a large memory footprint.

The VRML customizer of the present invention is to solve this problem, and the VRML customizer serves to optimize and publish the finished VRML source.

The VRML customizer includes an association file processor 2010, a source customizer 2020, an external device processor 2030, and a compression processor 2040.

The associated file processor 2010 performs a function of easily copying a designated folder of files associated with the current VRML file.

The source customizer 2020 detects and deletes unnecessary portions of the VRML source. That is, the source customizer 2020 searches the entire source and deletes unnecessary nodes, unused scripts, and parts defined as DEF without reuse, thereby minimizing the size of a file and optimizing memory usage. do.

When the user wants to connect with an external device, the external device processor 2030 inserts various web drivers provided by an internal device controller into an HTML page and publishes the same as a VRML file. The current editor does not provide a connection with an external device. So, the files produced in VRML could only be controlled by a keyboard and a mouse. By using the external device processor 2030 of the present invention, various 3D devices can be connected to VRML.

The compression processor 2040 compresses the VRML source by a compression method such as gzip.

21 is a flowchart illustrating an operation of a VRML customizer according to an embodiment of the present invention.

The association file processor 2010 makes it easy to copy and manage a designated folder of a file associated with the current VRML file (step 2110).

The source customizer 2020 finds and deletes an unnecessary portion of the current VRML source (step 2120).

When the user wants to use the external device, the external device processor 2030 connects to the external device through Java Applet, ActiveX, or the like (step 2130).

The compression processor 2040 compresses the VRML source modified by the source customizer 2020 by a compression method such as gzip (step 2140).

The VRML customizer stores the finally completed VRML file and publishes it on the web site if it is input through a URL (step 2150).

As described above, according to the present invention, a user can easily create a 3D virtual reality space using a VRML file.

Although the invention has been described in connection with the preferred embodiments mentioned above, other various modifications and changes may be made without departing from the spirit and scope of the invention. It is therefore contemplated that the appended claims will cover such modifications and variations as fall within the true scope of the invention.

Claims (12)

In the VRML editing system for building a three-dimensional virtual reality space, A VRML encoder for importing VRML files into the editor, checking grammar, and gathering the necessary information; A device controller that performs a function of allowing external devices to interwork with VRML; A VRML editor that performs a function of editing a VRML file read by the VRML encoder; A VRML customizer that performs a function of optimizing and publishing a completed 3D VRML source; And Library that provides basic or frequently used data when creating 3D space or object using VRML VRML editing system comprising a. The method of claim 1, The VRML encoder A source importer for loading a VRML source into a VRML editor; A compression processor that performs a function of automatically extracting the VRML files if the compressed file is examined by examining the file header even if the user does not separately decompress; A grammar checker that checks whether a VRML of a source conforms to a grammar; And Scene tree generator that finds elements in a scene graph with a hierarchical structure and creates a tree-like data VRML editing system comprising a. The method of claim 1, wherein the VRML editor A source editor for performing a function of allowing a user to directly modify a source discharged through the VRML encoder; An object generator and remodeler for generating and modifying 3D objects; A texture editor and customizer that performs a function of modifying and optimizing a texture mapped to or mapped to the object; An animator that performs a function of creating or modifying an animation; A multimedia mixer performing a function of inserting a multimedia source provided in VRML into VRML; And Property management that manages node's field and event values VRML editing system comprising a. The method of claim 3, wherein the source editor An inputable code indicator for performing a function of displaying codes that can be input at a current input position to a user; A grammar checker that checks whether a code input by a user conforms to a grammar; An error indicator for displaying a grammar checker so that a user can know if there is a wrong input as a result of the grammar checker; A property indicator for displaying all properties that a node currently working with may have in the property display window and values assigned to the property; And Three-dimensional synchronizer that performs the function of synchronizing the node with the three-dimensional viewer window when one complete node is created without error or when the error is corrected. VRML editing system comprising a. The method of claim 3, wherein the object generator and remodeler A target selector that performs a function of providing information about an object and a node selected by the user or currently working; An object generator that performs a function of generating an object determined by a user in a three-dimensional and two-dimensional source editor; An object attribute changer which performs a function of allowing a user to change various attributes related to the current object; And Object library that provides functions that are used frequently other than basic shapes provided by VRML. VRML editing system further comprises. 4. The texture editor of claim 3 wherein the texture editor and customizer An image importer for importing an image format into an editor; A target selector that performs a function of providing information about an object and a node selected by the user or currently working; An image editor for performing a function of allowing a user to modify an image; An image optimizer that performs a function of optimizing the image file; And Image library that stores frequently used images and provides functions when users need them VRML editing system comprising a. The method of claim 3 wherein the animator is A target selector that performs a function of providing information about an object and a node selected by the user or currently working; An external device selector for performing a function of allowing a user to select a device for generating an animation; an object movement and state change recorder which generates a time line and performs a function of recording movement and state change of an object input from a selected device; an illumination movement and state change recorder for generating a time line and recording a change in state and movement of illumination input from the selected device; a viewpoint movement recorder for generating a time line and recording a movement of a viewpoint input from a selected device; A condition generator that performs a function of generating a condition at which a current animation will occur; A script editor that performs a function of allowing a user to directly modify a script; An animation generator for generating and adding an animation to the current task; And Animation library that stores frequently used animations and provides them when the user needs them VRML editing system comprising a. The method of claim 3, wherein the multimedia mixer A target selector that performs a function of providing information about an object and a node selected by the user or currently working; A source selector configured to select and connect a sound and an image supported by the multimedia mixer; A condition generator that performs a function of generating a condition necessary to play the sound or the image; And Multimedia library that stores frequently used multimedia sources and provides them when the user needs them VRML editing system comprising a. The method of claim 3, wherein the attribute management A target selector that performs a function of providing information about an object and a node selected by the user or currently working; A node property extractor for extracting a property of a currently selected node; An attribute indicator configured to display the extracted attributes on a screen in a state in which the user can modify the attributes; And Synchronizer that performs the function of changing the attributes of the node and synchronizing them to the 3D source when the user modifies the attributes of the node VRML editing system comprising a. The device controller of claim 1, wherein the device controller is A device finder that performs a function of checking the status of devices currently connected to the computer and indicating available devices; A device selector that performs a function of allowing a user to select a device; A device controller which performs a function of generating a separate control routine when detailed control of a device selected by a user is required; A device mapper that performs a function of connecting a device selected by a user to a viewpoint or an object; And Device controller library that performs functions that support the controllers required to control various external devices VRML editing system comprising a. The method of claim 1, wherein the library is A user-defined library that stores user normalized data; Internet library that functions to form a library community by integrating various materials provided through the Internet. VRML editing system comprising a. The VRML customizer of claim 1 wherein the VRML customizer is An association file processor for performing a function of easily copying a designated folder of files associated with the current VRML file and easily managing the files; A source customizer for detecting and deleting unnecessary portions of the VRML source; An external device processor for performing a function of inserting various web drivers provided by an internal device controller in an HTML page and publishing them as a VRML file when a user wants to connect with an external device; And Compression handler that performs the function of compressing VRML sources. VRML editing system comprising a.