JP2021128808A - Three-dimensional shape data editing apparatus and three-dimensional shape data editing program - Google Patents

Abstract

To edit three-dimensional shape data so as not to corrupt original three-dimensional shape data.SOLUTION: A three-dimensional shape editing apparatus 10 sets an editing control range which indicates at least one of a protection range and an editing range of a three-dimensional shape represented by three-dimensional shape data formed of a group of voxels including three-dimensional position information, as an attribute of at least one voxel constituting the three-dimensional shape. In editing the editing range, when the voxel has an attribute of the protection range, the editing apparatus 10 sets a control condition for controlling editing of the editing range so that the voxel in the protection range may not be edited.SELECTED DRAWING: Figure 1

Description

The present invention relates to a three-dimensional shape data editing device and a three-dimensional shape data editing program.

Patent Document 1 describes a means including a computer for characterizing a graphic object as a volumetric object with a volume element in a system for deforming a graphic object displayed together with another graphic object, and the volume element described above. A user interface coupled to the computer to select and move a selected one of, and the selected volume element in response to the user interface by an amount specified by the user interface. A means for deforming a graphic object for deforming the graphic object as a result of the motion, a means for detecting and preventing a collision between the graphic objects when the graphic object is deformed, and a relative between the elements. A relaxation means for relaxing the position based on its elasticity, and a display for reproducing the result of moving, deforming, and relaxing the volumetric graphic object, coupled with the output of the relaxation means. A system for rapidly deforming a graphic object, which comprises means including means, is disclosed.

Patent Document 2 is a three-dimensional shape description method in an information processing system for holding and using shape data for describing a solid model in a three-dimensional space in a storage device. The shape processing device includes a storage device, an operation device, and a display device, and describes a step of displaying a fixed coordinate system for the three-dimensional space defined in advance on the display device, and one solid model. A step of receiving the first shape data and accepting the definition of a single or a plurality of floating coordinate system regions and resolutions for the solid model on the fixed coordinate system displayed on the display device, and the floating coordinate system region. And from the definition of resolution, the relative positional relationship of the floating coordinate system with respect to the fixed coordinate system is calculated algebraically, and whether the lattice points defined by the floating coordinate system are inside or outside the shape is determined. A step of defining a defined three-dimensional cell array, a step of describing the correspondence between the floating coordinate system and the three-dimensional cell array and generating a second shape data for describing the solid model, and the generated solid. A three-dimensional shape description method is disclosed, which comprises executing a step of holding a second shape data of a model in the storage device.

Patent Document 3 and Patent Document 4 disclose a technique for producing a three-dimensional shape by defining a color, a material, or the like in voxel data.

Japanese Unexamined Patent Publication No. 10-208078 Japanese Patent No. 3512406 U.S. Patent Application Publication No. 2014/324204 U.S. Patent Application Publication No. 2015/258770

In recent years, with the spread of 3D printers, it is expected that direct digital manufacturing (DDM), which is a final product that directly produces from digital data, will be actively performed. Since DDM enables small-lot, high-mix production, it is easy for users to obtain original products that are not mass-produced products.

In 3D printing, it is necessary to create three-dimensional shape data. It is difficult for a general user to model a 3D shape from 1 to generate 3D shape data, but the 3D shape is edited by editing the 3D shape based on the 3D shape data already prepared. It is relatively easy to generate the data.

However, when the three-dimensional shape is freely edited to generate the three-dimensional shape data, there is a possibility that the editing that impairs the original three-dimensional shape may be added.

An object of the present invention is to provide a three-dimensional shape data editing device capable of editing three-dimensional shape data within a range that does not disrupt the original three-dimensional shape data, and a three-dimensional shape data editing program.

The three-dimensional shape data editing device of the invention according to claim 1 has a three-dimensional shape protection target range and an editable range represented by three-dimensional shape data composed of a set of a plurality of voxels including three-dimensional position information. When at least one of the voxels is set as an attribute of at least one or more voxels constituting the three-dimensional shape, and when the editable range is edited, the voxel has the attribute of the protected range. A control condition setting means for setting a control condition for controlling editing of the editable range is provided so that the voxel in the protection target range is not edited.

In the invention according to claim 2, the control condition setting means uses at least one piece of information of a point, a line, a surface, and a space represented by the three-dimensional position information to give an attribute to the voxel in the protection target range. Set.

In the invention according to claim 3, the control condition setting means sets another protection target range different from the protection target range set as an attribute of at least one or more voxels, and the two protection target ranges are used with each other. Sets at least one control condition for the distance that can be separated, the distance that must be separated, the direction of separation, and the angle of separation.

In the invention according to claim 4, the control condition means sets the control condition using at least one information of a straight line, a plane, and a curved surface set by designating at least two or more voxels.

In the invention according to claim 5, when the range setting means sets the edit control range using the attributes of the voxels, the range setting means is held as other three-dimensional shape data different from the three-dimensional shape data to be edited. The editing control range is set using the above-mentioned information.

The three-dimensional shape editing program of the invention according to claim 6 causes the computer to function as each means of the three-dimensional shape creation data editing device according to any one of claims 1 to 5. It is an editing program of.

According to the inventions of claims 1 and 6, it has an effect that the three-dimensional shape data can be edited without breaking the original three-dimensional shape data.

According to the invention of claim 2, as compared with the case where the attribute is set to the voxel of the protection target range without using at least one information of the point, line, surface, and space represented by the three-dimensional position information. It has the effect of making it easier to set the attributes of voxels in the protected area.

According to the invention of claim 3, it has an effect that various control conditions can be set for the two protection target ranges.

According to the invention of claim 4, it has an effect that control conditions based on various information can be set.

According to the invention of claim 5, the edit control range is set as compared with the case where the edit control range is set without using the information held as other three-dimensional shape data different from the three-dimensional shape data to be edited. Has the effect of making it easier to set.

It is a block diagram of the three-dimensional shape data editing apparatus. It is a flowchart of an editing program for setting an editing control range of a 3D shape represented by 3D shape data. It is a flowchart of an editing program for editing an editable range of a 3D shape represented by 3D shape data. It is a figure which shows the data structure of 3D shape data. It is a figure which shows an example of a three-dimensional shape. It is a figure which shows an example of a three-dimensional shape. It is a figure which shows an example of a three-dimensional shape. It is a figure for demonstrating the protection target range and editable range. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the protection target range. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition. It is a figure for demonstrating the control condition.

Hereinafter, examples of embodiments for carrying out the present invention will be described in detail with reference to the drawings.

First, with reference to FIG. 1, the configuration of the three-dimensional shape data editing device 10 according to the present embodiment will be described.

The editing device 10 is composed of, for example, a personal computer or the like, and includes a controller 12. The controller 12 includes a CPU (Central Processing Unit) 12A, a ROM (Read Only Memory) 12B, a RAM (Random Access Memory) 12C, a non-volatile memory 12D, and an input / output interface (I / O) 12E. The CPU 12A, ROM 12B, RAM 12C, non-volatile memory 12D, and I / O 12E are each connected via the bus 12F.

Further, the operation unit 14, the display unit 16, the communication unit 18, and the storage unit 20 are connected to the I / O 12E. The CPU 12A is an example of a range setting means, a control condition setting means, and an editing means.

The operation unit 14 includes, for example, a mouse and a keyboard.

The display unit 16 is composed of, for example, a liquid crystal display or the like.

The communication unit 18 is an interface for performing data communication with an external device.

The storage unit 20 is composed of a non-volatile storage device such as a hard disk, and stores a three-dimensional shape data editing program or the like, which will be described later. The CPU 12A reads and executes an editing program for three-dimensional shape data stored in the storage unit 20.

Next, the operation of the editing device 10 according to the present embodiment will be described with reference to FIGS. By executing the editing program by the CPU 12A, the editing process shown in FIG. 2 is executed. The editing process shown in FIG. 2 is executed, for example, when the user operates to instruct the execution of the editing program. Here, the process shown in FIG. 2 is a process for setting the editing control range of the three-dimensional shape represented by the three-dimensional shape data. The edit control range represents at least one of a protected range that prohibits editing of a three-dimensional shape and an editable range that enables editing of a three-dimensional shape. The process of FIG. 2 is executed, for example, when setting an edit control range for three-dimensional shape data modeled by a corporate designer or the like.

In the present embodiment, "editing" means that at least a part of a three-dimensional shape is subjected to processing such as deformation, enlargement, reduction, movement, rotation, addition, deletion, replacement, and composition. Includes changing the shape of at least a part of the original shape.

Further, "editing" means addition, deletion, modification, replacement, composition, etc. of at least a part of at least one attribute information of color, strength, material, and texture given to the three-dimensional position information. It includes changing at least a part of the attributes of the three-dimensional shape by applying the process.

Here, the material refers to information representing the genre of the material such as resin, metal, rubber, information representing the material name such as ABS, PLA, product name representing a commercially available material, information representing the product number, etc., ISO, It includes at least one piece of information representing materials such as material names, abbreviations, and numbers defined by standards such as JIS, and information representing material properties such as thermal conductivity, conductivity, and magnetism.

Further, the texture represents attribute information representing not only color but also appearance and touch feeling such as reflectance, transmittance, gloss, and surface property of three-dimensional shape data.

The attribute information includes an attribute pattern set by using at least one piece of information such as a period, a mathematical formula, and other three-dimensional shape data given to the three-dimensional position information. The attribute pattern is to continuously change the color, material, texture, etc. of the 3D shape data according to the repetition of a fixed cycle, gradation, expression by inclination or pole point expressed by a mathematical formula, other 3D shape data, etc. Includes at least one of filling or continuously changing the indicated range of 3D shape data with the indicated shape.

In step S100, the three-dimensional shape data that models the three-dimensional shape is read from the storage unit 20, and the three-dimensional shape based on the read three-dimensional shape data is displayed on the display unit 16. The three-dimensional shape data is generated when the user operates the operation unit 14 to create at least a three-dimensional shape and specify attributes such as color and material.

In this embodiment, a case where a data format for expressing the three-dimensional shape by a set of voxels is used as the data format for the three-dimensional shape data will be described, but other data formats may be used.

Here, the voxel is a basic element of a three-dimensional shape, and for example, a rectangular parallelepiped is used, but the voxel is not limited to the rectangular parallelepiped, and a sphere, a cylinder, or the like may be used. By stacking these voxels, a desired three-dimensional shape is expressed. In addition, by designating attributes such as color and material for each voxel, the display of three-dimensional shape data and the color and material after modeling are expressed.

The three-dimensional shape data according to the present embodiment controls voxel information about a plurality of voxels constituting the three-dimensional shape, protection attributes representing the protected range and editable range of the three-dimensional shape, and editing of the three-dimensional shape. Includes control conditions for

Specifically, as shown in the data structure 30 shown in FIG. 4, it is a structure of table data representing the correspondence between the voxel ID, the protection attribute, and the control condition. The data structure is not limited to table data, and may be another structure such as a hierarchical structure as long as it is a data structure representing the above-mentioned correspondence.

The voxel ID is a unique ID assigned to each voxel. The voxel ID may be represented by the coordinate values of X, Y, and Z in the three-dimensional space, or may be represented by the index numbers of X, Y, and Z when the three-dimensional space is evenly divided by a grid. It may be represented by a serial number from the origin.

The protection attribute is information indicating whether to protect the three-dimensional shape or allow editing, and is information of "protection" that prohibits editing of the three-dimensional shape or "edit" that permits editing of the three-dimensional shape. Is set for each voxel or for each range set by the voxel.

Further, attributes such as voxel color and material may be set in the data structure 30. In this case, the color of the voxel is represented by, for example, R (red), G (green), B (blue), and A (Alpha: transparent). Further, the attribute may hold information equivalent to the information such as color, strength, material, and texture given to the above-mentioned three-dimensional shape data as the data structure 30 instead of each voxel.

The control condition is a condition for controlling the editing of the three-dimensional shape, and the details will be described later.

FIG. 5 shows an example of a three-dimensional shape represented by a set of voxels. As shown in FIG. 5, the three-dimensional shape 32 represents a rabbit as a set of a large number of voxels 34. By reducing the size of the voxel 34, the three-dimensional shapes 32A and 32B are expressed in more detail as shown in FIGS.

In step S102, it is determined whether or not the edit control range setting is specified by the user's operation, and if it is affirmed, the process proceeds to step S104, and if it is denied, this routine is terminated.

In step S104, the edit control range is set. For example, the user specifies a protected range of the three-dimensional shape, that is, a range in which editing is prohibited and an editable range in which editing is permitted.

For example, as shown in FIG. 8, for the three-dimensional shape 32 of the rabbit, a boundary line 36 is set at the boundary between the body and the head of the rabbit, the body of the rabbit is set as the protection target range 38, and the head is set. It can be set as the editable range 40. The boundary line 36 is set by designating, for example, two or more voxels. Further, the boundary line 36 may be any of a line segment, a half straight line, and a straight line represented by two voxels, and may be a curve represented by three or more voxels.

The editing control range may be newly defined for the three-dimensional shape data, the three-dimensional position information originally included in the three-dimensional shape data, and the attribute information given to the three-dimensional position information. May be used as the edit control range. For example, when the head and the body are defined as separate parts, the editing control range may be set so that only the head part can be edited.

Further, as shown in FIG. 9, a boundary surface 42 is set at the boundary between the protection target range and the editable range, for example, a range below the boundary surface 42 is set as the protection target range 44, and above the boundary surface 42. The range of may be set as the editable range 46. The boundary surface 42 is set by designating, for example, three voxels. Further, although the boundary surface 42 is a flat surface, a large number of voxels may be specified and the boundary surface may be set to be a curved surface.

Further, as shown in FIG. 10, for example, in the three-dimensional shape 32 of the rabbit, when the three-dimensional position information representing the range 51 inside the ears of the rabbit is given the strength attribute of being soft, the same strength attribute is given. The edit control range may be set so that only the range of the given three-dimensional shape data is the editable range. Further, when the attribute pattern of filling the three-dimensional position information representing the range 53 inside the body of the rabbit with the lattice structure of the repetition period is given, the range of the three-dimensional shape data to which the same attribute pattern is given is given. The edit control range may be set so that only the editable range or the protected range is set.

Similarly, when color information is added to the three-dimensional position information or texture mapping is performed, only the range of the three-dimensional shape data to which an arbitrary color is added may be set as the edit control range. In this case, a specific color may be specified, or a certain color range may be specified.

Similarly, when material information is added to the three-dimensional position information, only the three-dimensional shape data range to which any material is added may be set as the edit control range. In this case, one specific material such as ABS or PLA may be specified, or the genre of the material such as resin, metal or rubber containing the material may be specified, or the conductivity above a certain level and a specific range. The range of material properties may be specified, such as the thermal conductivity of.

Further, as shown in FIG. 11, in the case of the three-dimensional shape 48 of the outlet cover, for example, the surface 50 indicated by the broken line may be set as the editable range.

As described above, the edit control range may be newly defined for the three-dimensional shape data, and the three-dimensional position information originally included in the three-dimensional shape data and the three-dimensional position information are given. The attribute information provided may be used as the editing control range. For example, a range of three-dimensional shape data that can be determined to be a continuous plane having a constant curvature, such as the surface 50, may be set as an edit control range.

In addition, the user may set both the protected range and the editable range, or may set only the protected range and automatically set the other range as the editable range. Further, only the editable range may be set, and the other ranges may be automatically set as the protection target range.

In step S106, the protection attribute is set for each voxel. That is, the protection attribute is set to "protection" for the voxels in the protection target range specified by the user, and the protection attribute is set to "edit" for the voxels in the editable range.

In step S108, it is determined whether or not the control condition is specified by the operation of the user, and if it is affirmed, the process proceeds to step S110, and if it is denied, the process proceeds to step S102.

In step S110, the control condition specified by the user is set in the three-dimensional shape data.

A specific example of setting control conditions will be described below.

For example, as shown in FIG. 9, the user may set the rabbit neck in the protection target range and set the control voxel 52 with a control condition that the rabbit neck is not shrunk inside the control voxel 52 around the neck. This limits editing that makes the rabbit's neck thinner.

Further, as shown in FIG. 9, a control condition is set in the control voxel 54 that the vicinity of the center of the rabbit's neck is set as the protection target range and the control voxel 54 is rotated around the control voxel 54 set in the center of the neck. May be good. At this time, the rotation axis and the rotation angle may be set. This suppresses unnatural editing in which the rabbit's head rotates around a range other than the rabbit's neck.

Further, as shown in FIG. 9, for example, the vicinity of the rabbit's ear is set as a protection target, and two voxels are paired so that the control voxel 56A and the control voxel 56B are paired and the control voxel 58A and the control voxel 58B are paired. As a control condition, the maximum separation distance at which the paired voxels can be separated from each other may be set. Further, the minimum separation distance at which the paired voxels must be separated from each other may be set as a control condition. Further, the control condition may be a direction, an angle, or the like that can be separated. As a result, for example, it is possible to prevent the distance between the left and right ears of the rabbit from changing significantly. Further, control conditions may be set so that the thickness around the pair of voxels is within a predetermined range. This prevents large changes, such as rabbit ears being too thick or too thin.

Further, as shown in FIG. 12, in the case of the three-dimensional shape 48 of the outlet cover, for example, the mounting surface 60 of the outlet cover is set, and editing such that the three-dimensional shape 48 exists behind the mounting surface 60 is prohibited. Control conditions may be set. In order to set the mounting surface 60, for example, three voxels may be set at three points for defining a plane at infinity representing the mounting surface 60. Note that this voxel does not represent three-dimensional shape data, but may be a range setting voxel for representing editing control conditions.

Further, in order to make it impossible to edit the range of the screw 62 for attaching the outlet cover to the wall, the area 64 including the screw 62 may be set as the protection target range.

Further, since the power plug is inserted into the outlet cover, the space ranges 66 and 67 into which the power plug is inserted are set as the protection target range, and the editing is performed so that the three-dimensional shape 48 exists in the space ranges 66 and 67. Control conditions to be prohibited may be set. Further, the spatial range may be set as an editable range, and control conditions may be set to allow deformation such that a three-dimensional shape exists in the spatial range.

To set the spatial ranges 66 and 67, for example, voxels that occupy the spatial range may be set. Alternatively, a voxel that is a feature point that defines the space may be set. Alternatively, other 3D shape data that defines the spatial ranges 66, 67 may be used. As for the other three-dimensional shape data, for example, the three-dimensional shape data representing the spatial range 66 may be prepared as data different from the three-dimensional shape 48 and used as the editing control range of the three-dimensional shape 48. In that case, a plurality of three-dimensional shape data representing the spatial range 66 may be read and set as a plurality of spatial ranges 66 and 67 having the same three-dimensional shape.

Further, the spatial range may be a spatial range having a distorted shape or a complicated shape representing another component shape, in addition to a simple shape such as a cube, a sphere, or a cylinder. Further, a continuous space may be a range, or a discontinuous space may be a range. For example, a plurality of different component shapes that are separated from each other in position may be grouped into one space range, or finely distributed spaces of various sizes may be grouped into one space range.

When setting a spatial range with other 3D shape data, only the spatial range that fits inside the 3D shape to be edited may be set as the editing control range, or the 3D shape to be edited may be set. Only the outer space range may be set as the edit control range, or the space range that straddles the inside and outside of the three-dimensional shape to be edited may be set as the edit control range.

Further, when the editing control range is set with other three-dimensional shape data, it is not limited to the spatial range. The three-dimensional position information of points, lines, and surfaces may be retained as other three-dimensional shape data different from the three-dimensional shape data to be edited.

In addition, when setting the edit control range by defining three-dimensional shape data such as points, lines, faces, and spaces using voxels, the voxels used do not represent the three-dimensional shape data, and the edit control conditions are set. It may be a voxel for setting a range to represent.

Further, as shown in FIG. 13, when the control voxel 72 is specified for the protection target range 70, the editable range 74 is moved and expanded so as to exist on the protection target range 70 side indicated by the arrow A direction with respect to the control voxel 72. , The control condition for prohibiting reduction or the like may be set in the control voxel 72. In FIG. 13, although it is described two-dimensionally for convenience of illustration, it is actually controlled three-dimensionally. The same applies to FIGS. 14 to 19.

Further, as shown in FIG. 14, when two control voxels 78A and 78B are specified in the protection target range 70, the editable range 74 is a line segment 80 or a half straight line 80 or a straight line 80 connecting the two control voxels 78A and 78B. Control voxels 78A and 78B may be set with control conditions for prohibiting movement, enlargement, reduction, etc. so as to exist on the protection target range 70 side. At this time, control conditions that allow the editable range 74 to move on the line segment 80, the half straight line 80, or the extension line of the straight line 80 may be set in the control voxels 78A and 78B.

Further, as shown in FIG. 15, when three control voxels 82A, 82B, 82C are specified for the protection target range 70, the editable range 74 is formed by connecting the three control voxels 82A, 82B, 82C. Control voxels 82A, 82B, 82C may be set with control conditions for prohibiting movement, enlargement, reduction, etc. so as to exist on the protection target range 70 side of 84. At this time, control conditions that allow the editable range 74 to move on the plane including the surface 84 and the surface 84 may be set in the control voxels 82A, 82B, 82C.

Further, as shown in FIG. 16, when the control voxel 86 and the rotation angle θ are specified in the protection target range 70, the control for prohibiting the editable range 74 from rotating around the control voxel 86 beyond the rotation angle θ. The condition may be set in the control voxel 86.

Further, as shown in FIG. 17, when two control voxels 88A and 88B and a rotation angle θ are specified for the protection target range 70, the editable range 74 is about the straight line 90 connecting the two control voxels 88A and 88B as an axis. Control voxels 88A and 88B may be set with control conditions for prohibiting rotation beyond the rotation angle θ.

Further, as shown in FIG. 18, the control voxel 92 is set in the protection target range 70, the control voxel 94 is set in the editable range 74, and the distance D between the control voxel 92 and the control voxel 94 exceeds a predetermined distance. The control conditions for prohibiting the above may be set in the control voxels 92 and 94. Further, control conditions for prohibiting the distance D between the control voxel 92 and the control voxel 94 from being within a predetermined distance may be set in the control voxels 92 and 94.

Further, as shown in FIG. 19, the control voxel 96 set in the protection target range 70A may set a control condition that the control voxel 96 must be set in the outermost part of the protection target range 70A. Further, the control voxels 98 set in the protection target range 70B may set a control condition that n or more voxels (three in the example of FIG. 19) must exist outside the control voxels 98.

A new restriction condition may be defined for the editing control range set in the three-dimensional shape data, or a predetermined restriction condition may be applied. For example, restriction conditions such as thickness, length, and diameter of parts specified by standards such as ISO and JIS, or restriction conditions such as thickness, length, and diameter specified by specifications and restrictions of manufacturing equipment. Alternatively, the restriction conditions and the like often used by the user may be set in the edit control range.

Further, the edit control range and the restriction condition may be combined and managed. In that case, the edit control range and the restriction condition may be applied to the three-dimensional shape data to be edited at the same time, or only the edit control range or only the restriction condition may be applied.

Further, the editing control range and the limiting condition may be combined and held as other three-dimensional shape data different from the three-dimensional shape data to be edited.

The control conditions described in FIGS. 13 to 19 may be combined. Further, the three-dimensional shape may be protected and only the attribute information given to the three-dimensional shape may be editable. On the contrary, the control conditions may be combined so that the three-dimensional shape can be edited and the attribute information given to the three-dimensional shape is protected.

In step S111, it is determined whether or not "end" is selected by the user's operation, and if it is affirmed, the process proceeds to step S112, and if it is denied, the process proceeds to step S102 and the above processing is repeated.

In step S112, the processed three-dimensional shape data is stored in the storage unit 20.

In the process of FIG. 2, the case where the already created 3D shape data is read and the edit control range is set has been described. However, even if the edit control range is set while creating the 3D shape data. good.

Next, with reference to FIG. 3, an editing process by an editing program for editing the editable range of the three-dimensional shape will be described. By executing the editing program by the CPU 12A, the editing process shown in FIG. 3 is executed. The editing process shown in FIG. 3 is executed, for example, when the execution of the editing program is instructed by the user's operation. Here, the process shown in FIG. 3 is a process for editing the three-dimensional shape data in which the editable range of the three-dimensional shape has already been set. The process of FIG. 3 is executed, for example, when a user who has already set the editable range of the three-dimensional shape by another author edits the three-dimensional shape data acquired via the Internet at home.

In step S200, the three-dimensional shape data designated by the user is read from the storage unit 20, and the three-dimensional shape object based on the read three-dimensional shape data is displayed on the display unit 16.

In step S202, it is determined whether or not editing is instructed for the three-dimensional shape displayed on the display unit 16 by the user's operation, and if it is affirmed, the process proceeds to step S204, and if it is denied, step S210 Move to.

In step S204, it is determined whether or not the range instructed to edit in step S202 is the editable range. If it is determined that the range instructed to edit in step S202 is the editable range, the process proceeds to step S206, and if it is determined that the range is not the editable range, the process proceeds to step S208.

In step S206, the three-dimensional shape is edited based on the control conditions of the read three-dimensional shape data.

On the other hand, in step S208, since the editing of the three-dimensional shape data is protected, a warning message warning that the editing of the three-dimensional shape data is restricted is displayed on the display unit 16.

For example, the three-dimensional shape is the three-dimensional shape 32 of the rabbit shown in FIG. 8 described above, and the control voxel 52 is designated around the neck of the rabbit, and the control condition that the voxel 52 is not reduced to the inside of the designated control voxel 52 is controlled. It is assumed that the voxel 52 is set. In this case, even if the user instructs to edit the rabbit so that the neck becomes thin, the editing is not permitted by displaying a warning message, stopping the editing, or disabling the user's instruction. This limits editing that makes the rabbit's neck thinner and protects the scope of protection.

Further, when the instruction is to edit only the editable range without editing the protected range, the instruction is permitted, and the three-dimensional shape edited according to the instruction is displayed on the display unit 16.

If the range instructed to edit is not the editable range, the operation of the edit instruction may be invalidated.

Further, when the range instructed to be edited includes both the protected range and the editable range, editing may be permitted only in the editable range. For example, when the editing operation approaches the protected range, only the editing up to the protected range may be reflected, and the editing may be stopped with the protected range as the boundary. Or, when trying to synthesize other 3D shape data for the protected range for which only the attribute information can be edited and the control condition is set, the 3D shape is not reflected and is added to the 3D shape data. Only the attribute information may be combined in the target range.

In addition, you may be allowed to edit the scope of protection only if certain conditions are met. For example, the user is the same user who set the edit control range, or the user holds specific permission information such as a password and encryption key set by the user who set the edit control range. If the specific conditions of are met, the protected range may be allowed to be edited by changing the protected range setting.

In step S210, it is determined whether or not "end" is selected by the user's operation, and if it is affirmed, the process proceeds to step S212, and if it is denied, the process proceeds to step S202 and the above processing is repeated.

In step S212, the processed three-dimensional shape data is stored in the storage unit 20.

In this way, when the control conditions for controlling the editing of the editable range are set, the protected range is not edited and only the editable range is edited, so that the original three-dimensional shape is not impaired. The three-dimensional shape is edited with.

In the present embodiment, the case where the processes of FIGS. 2 and 3 are set as separate programs has been described, but the present invention is not limited to this, and the processes of FIGS. 2 and 3 may be combined into one program.

In the present embodiment, the case where the three-dimensional shape data editing program is pre-installed in the storage unit 20 has been described, but the present invention is not limited to this. For example, the editing program may be stored in a storage medium such as a CD-ROM (Compact Disk Read Only Memory) and provided, or may be provided via a network.

Further, the processing flow of the editing program described in the present embodiment (see FIGS. 2 and 3) is also an example, and unnecessary steps are deleted or new steps are added within a range that does not deviate from the gist of the present invention. Needless to say, the processing order may be changed.

10 Three-dimensional shape editing device 12 Controller 30 Data structure 32 Three-dimensional shape 34 Voxel 38 Protected range 40 Editable range

Claims (6)

The three-dimensional shape constitutes the edit control range representing at least one of the protected range and the editable range of the three-dimensional shape represented by the three-dimensional shape data composed of a set of a plurality of voxels including the three-dimensional position information. A range setting means to set as an attribute of at least one or more voxels,
When editing the editable range, if the voxel has the attribute of the protected range, a control condition for controlling the editing of the editable range is set so that the voxel in the protected range is not edited. Control condition setting means and
A three-dimensional shape data editing device equipped with. The tertiary according to claim 1, wherein the control condition setting means sets an attribute to the voxel in the protection target range by using at least one information of a point, a line, a surface, and a space represented by the three-dimensional position information. Original shape data editing device. The control condition setting means sets another protection target range different from the protection target range set as an attribute of at least one or more voxels, and the two protection target ranges are separated by a distance that can be separated from each other. The three-dimensional shape data editing device according to claim 2, wherein at least one control condition of a distance, a direction of separation, and an angle of separation that must be set is set. The three-dimensional shape data according to claim 2, wherein the control condition setting means sets the control condition using at least one information of a straight line, a plane, and a curved surface set by designating at least two or more voxels. Editing device. When setting the edit control range using the attributes of the voxel, the range setting means uses the information held as other three-dimensional shape data different from the three-dimensional shape data to be edited to perform the edit control. The three-dimensional shape data editing device according to any one of claims 1 to 4, which sets a range. A three-dimensional shape data editing program for causing a computer to function as each means of the three-dimensional shape creation data editing device according to any one of claims 1 to 5.

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