JP4033336B2 - 3D shape processing apparatus, 3D shape processing method, program, and storage medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional shape processing method executed on a dedicated three-dimensional shape processing device or a general-purpose information processing device, and more particularly, a surface coating that can set a different surface coating color depending on the type of surface coating target. It is about the method.
[0002]
[Prior art]
In recent years, three-dimensional shape processing systems such as CAD / CAM systems have been actively used when designing products. However, when using it, all the work performed in each process from the design process, which is the upstream process of design, to the manufacturing / production process, which is the downstream process, is performed by only one 3D shape processing system. Since it is impossible, three-dimensional shape data is currently exchanged between a plurality of three-dimensional shape processing systems. For example, the 3D shape data of the product exterior created in the design department is read into the product design CAD system used in the design department, or the 3D shape data of the product design CAD system is read into the CAD / CAM system for mold design. Such work is performed.
As a means for exchanging 3D shape data between different 3D shape processing systems, the IGES format file is widely used and recognized as a standard format for exchanging 3D shape data. However, even when the IGES format widely used as a standard format is used, problems often occur when data is exchanged between different three-dimensional shape processing systems. This is mainly because the tolerance value of the three-dimensional shape processing system varies from system to system. The allowable error is an error caused by assuming that a numerical value below a certain threshold is 0, and is used for determining whether two geometric shapes are coincident. For example, considering the data exchange between the system A having an allowable error of 0.001 and the system B having an allowable error of 0.000001, a value that is regarded as 0 by the system A, for example, 0.0005 is the system. B is not considered 0.
[0003]
Because of this difference in tolerance values, there are cases where geometric elements that are considered to be matched in one system are considered not to be matched in another system. There is a phenomenon in which the boundary between the two curved surfaces is separated in another system, and a minute gap is generated between them. In addition, a phenomenon may occur in which geometric data of a surface represented by a quadric surface such as a plane, a sphere, a cylinder, or a cone in one system is represented by a free-form surface in another system. Geometric data expressed by planes and quadratic surfaces represent product shape characteristics and are easier to handle than free-form surfaces, so planes and quadratic surfaces remain unchanged when exchanging data. Of course, it is desirable to be treated.
In addition, even if the tolerance value is different, a data exchange method that does not generate a minute gap between curved surfaces and a function that can exchange data without changing the expression format of the curved surface are widely desired. However, it is very difficult to cope with any three-dimensional shape data. Therefore, it is very important to be able to easily confirm that such a phenomenon has occurred while allowing a gap between curved surfaces or a change in the expression format of the curved surface to some extent during data exchange.
[0004]
[Problems to be solved by the invention]
However, in the prior art, there is a problem that it is not possible to easily confirm that a gap is generated between curved surfaces at the time of data exchange and that the expression format of the curved surface has changed.
An object of the present invention is to solve such a problem of the prior art. Specifically, it is possible to easily confirm an unintended change in a gap between curved surfaces generated during data exchange or the like and a representation format of the curved surface. It is to provide a three-dimensional shape processing method.
[0005]
[Means for Solving the Problems]
The inventions of 請 Motomeko 1, in the three-dimensional shape processing apparatus capable of setting the surface coating color of the three-dimensional shape model, the surface is a kind of three-dimensional shape data, paint for setting the surface coating color for each solid and color setting means, is characterized in that and a surface coating means for performing a surface coating of a three-dimensional shape model according to surface coating color which is set by the fill color setting means.
請 Motomeko second inventions, in the three-dimensional shape processing apparatus capable of setting the surface coating color of a three-dimensional shape model is a kind of geometric data of the loop present in the 3-dimensional shape model plane, secondary curved, and fill color setting means for setting a surface coating color for each free-form surface, a surface coating means for performing a surface coating of a three-dimensional shape model according to surface coating color which is set by the fill color setting means, further comprising a Features.
The inventions of 請 Motomeko 3, a three-dimensional shape processing method performed by the three-dimensional shape processing apparatus capable of setting the surface coating color of a three-dimensional shape model, the three-dimensional shape according to the specification of the input device The method includes a step of setting a surface coating color for each surface and solid, which is a type of data, and a step of performing surface coating of a three-dimensional shape model according to the set surface coating color .
The inventions of 請 Motomeko 4, a three-dimensional shape processing method performed by the three-dimensional shape processing apparatus capable of setting the surface coating color of a three-dimensional shape model, the three-dimensional shape according to the specification of the input device A step of setting a surface coating color for each plane, quadratic surface, and free-form surface, which is a type of geometric data of a loop existing in the model, and a step of performing surface coating of a three-dimensional shape model according to the set surface coating color. It is characterized by having .
The invention of claim 5 is a program, characterized by causing the computer of the three-dimensional shape processing apparatus to execute each step of the three-dimensional shape processing method of claim 3 or claim 4.
The invention according to claim 6 is a computer-readable storage medium, and stores the program according to claim 5.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing the main part of a three-dimensional shape processing apparatus according to each embodiment of the present invention. As shown in the figure, the three-dimensional shape processing apparatus includes a CPU 1 that controls the entire apparatus according to a program and executes the three-dimensional shape processing according to the present invention, and a memory that temporarily stores the program and various data (for example, RAM) 2, shape data storage unit (for example, a partial area of a hard disk device) 3 for storing 3D shape data including type information of 3D shape data, geometric type of surface, etc., information related to graphics display A graphics information storage unit (for example, a partial area of the hard disk device) 4 that stores certain graphics information, a graphics processor 5 that performs a drawing process according to a graphics command passed from the CPU 1, and a display data being displayed Display memory 6, display device 7 for displaying a three-dimensional shape model, keyboard, And a like input device 8 having a mouse. In this three-dimensional shape processing apparatus, the paint color setting means and the switching means described in the claims are realized by the memory 2 storing the program, the CPU 1 operating according to the program, the display memory 6, the display device 7, and the input device 8. The surface painting means is realized by the same memory 2, CPU 1 and graphic processor 5, and the display means is realized by the same memory 2, CPU 1, graphic processor 5, display memory 6 and display device 7.
With such a configuration, in the three-dimensional shape processing apparatus according to the first embodiment of the present invention, surface painting is performed by changing the color for each type of three-dimensional shape data (by shape type) according to the user's designation. Surface painting is performed by changing the color for each type of geometric data of the loop forming the surface of the three-dimensional shape model (for each surface type). Note that the types of three-dimensional shape data are roughly divided into three types: wire frames, surfaces, and solids. However, since the wire frame does not hold any surface data, it is not a target for surface coating. The surface is data in which a loop having no curved surface data exists in a part of the three-dimensional shape model. Since there is no surface data in the gap between the curved surfaces generated after the data exchange, the three-dimensional shape data in which the gap is generated always becomes a surface. Solid is data that is filled with content, and all loops hold curved surface data.
In this way, by providing means for changing the color for each type of three-dimensional shape data and painting the surface, in this embodiment, it is visually confirmed whether or not a gap has occurred between curved surfaces after data exchange. By providing a means to set different surface colors for each type of surface geometric data, it is easy to check loops in which the curved surface expression format has changed unintentionally after data conversion It can be done.
[0008]
2 to 5 show an operation flow of the first embodiment of the present invention. The operation of this embodiment will be described below with reference to FIGS.
In this embodiment, first, it is determined whether or not the surface coating method designated by the user at that time is the surface coating for each shape type described above (S1). And if it is surface coating by shape type (“Yes” in S1), surface coating by shape type described later is executed (S2). On the other hand, if it is not the surface coating by shape type (“No” in S1), it is determined whether or not the surface coating is by surface type (S3). If the surface coating is by surface type (“ Yes ") Surface type-specific surface coating described later is executed (S4). If it is not the surface coating for each surface type (“No” in S3), the surface coating for each loop described later is executed (S5). In this embodiment, information indicating the designated surface painting method is stored in the graphics information storage unit 4 for each graphic window. The graphic window ID (identifier), information on the surface painting method, and the surface painting object (identifier of the three-dimensional shape data) are stored as graphics information.
[0009]
Next, surface coating by shape type will be described with reference to the flowchart shown in FIG.
In this surface painting, first, for example, the three-dimensional shape data of the three-dimensional shape model of the surface painting object input from another three-dimensional shape processing system and stored in the shape data storage unit 3 is acquired (S11). Then, the type (shape type) of the 3D shape data is determined from the characteristics of the 3D shape data (S12). The determination result is stored in the shape data storage unit 3 in association with the three-dimensional shape data.
Thus, when the determination result is “wire frame”, the three-dimensional shape model does not have a surface, and thus the operation flow is terminated without performing surface painting.
On the other hand, if the determination is “solid”, the face painting color in the case of the solid designated in advance by the user is acquired (S13), and the surface of the three-dimensional shape model is painted with the acquired color. (S14). If it is determined in step S12 that the surface is a surface, the face color for the surface designated by the user in advance is acquired (S15), and the surface of the 3D shape model is acquired with the acquired color. Apply (S14).
[0010]
Next, surface coating by surface type will be described with reference to the flowchart shown in FIG.
In this surface painting, first, for example, the three-dimensional shape data of the three-dimensional shape model to be surfaced is input from another three-dimensional shape processing system and stored in the shape data storage unit 3 (S21).
Subsequently, data indicating the type of the surface set in advance as one of the three-dimensional shape data for the surface in the three-dimensional shape data is acquired, and the type (surface type) of the surface is determined (S22). If it is determined that the surface is a free-form surface, a surface-painting color in the case of a free-form surface designated in advance by the user is acquired (S23), and the surface is painted with the acquired color. (S25).
On the other hand, in the case of the determination “is a plane”, the surface paint color in the case of the plane designated in advance by the user is acquired (S24), and the surface paint with the acquired color is performed (S25). ). If it is determined in step S22 that the surface is a quadric surface such as a sphere, a cylinder, or a cone, the surface paint color in the case of a quadric surface designated in advance by the user is acquired (S26). Surface painting with the acquired color is performed (S25).
[0011]
Next, loop surface coating will be described with reference to the flowchart shown in FIG.
In this surface painting, first, the three-dimensional shape model of the surface painting target stored in the shape data storage unit 3 is input, whether it is input from another three-dimensional shape processing system or created in the three-dimensional shape processing system. Three-dimensional shape data is acquired (S31). It should be noted that the target 3D shape data and the surface type-specific surface coating are effective even if they are created in the 3D shape processing system. For example, if the surface type changes from a quadratic surface to a free-form surface due to unintentional movement of a vertex on the surface, or if the position of the boundary of different surfaces matches even if the surface type changes to a surface It is because it may be judged that it is solid. Such a change can be easily visually determined by surface coating by surface type or surface coating by shape type.
Subsequently, it is determined whether or not a surface color is set for the loop in the three-dimensional shape data (S32). If it is set (“Yes” in S32), it is designated by the user in advance (for example, when a three-dimensional shape data is created, a color is set on a specific surface and is stored as one of the three-dimensional shape data. The surface paint color of the surface of the loop is acquired (S33), and the surface paint of the surface of the loop is performed with the acquired color (S34).
On the other hand, if the face paint color of the loop is not set (“No” in S32), a preset default face paint color is acquired (S35), and the color obtained for the face of the loop is obtained. Surface painting is performed (S34).
[0012]
Next, a method for the user to specify the surface coating method on the screen will be described.
FIG. 6 shows an example of a screen displayed at that time. In FIG. 6, □ represents a button or a check box, and a frame displayed as “screen” on the upper side is a screen image for switching the surface painting method. If the “Sketch” button in this frame is pressed or checked, “Shape Type” (surface paint for each shape type), “Surface Type” (surface paint for each surface type), One of “surfaces” (surface coating by loop) can be selected. In addition, in the example of FIG. 6, the state which has shown the location which is (■) is shown. When the illustrated “line drawing” button is pressed or checked, the pressed state or checked state of the above-described screen button is ignored.
Thus, according to this embodiment, the difference in shape type and the difference in surface type can be easily recognized by the difference in color of the surface. Easy to confirm. Further, a specific surface (specific loop) can be easily confirmed by the difference in color of the surface.
[0013]
Next, a second embodiment of the present invention will be described with reference to the operation flowchart shown in FIG.
In this embodiment, when a three-dimensional shape model is displayed in a designated graphics window, first, three-dimensional shape data to be displayed is acquired (S41). Then, the user designates the graphics window to be displayed and the display method, acquires information indicating the designated graphics window and the display method (S42), and determines whether or not the display method is a plane display (S43). ).
In this way, if it is determined that the screen is displayed (“Yes” in S43), the surface painting process (see FIGS. 2 to 5) shown in the first embodiment is executed, and the result is reflected. The three-dimensional shape model is displayed in the designated graphics window (S44). On the other hand, if it is determined that the display method is not plane display (“No” in S43), line drawing display (wire frame display) is displayed on the specified graphics window using the acquired three-dimensional shape data. Perform (S45).
In the above, for the same three-dimensional shape data, a plane drawing display is designated in one graphics window and a line drawing display is designated in the other graphics window, or in one graphics window. Specify the surface display that changes the surface color for each shape type, and specify the surface display that changes the surface color for each surface type in the other graphics window. Can be displayed.
Thus, according to this embodiment, not only the same effect as in the first embodiment can be obtained, but also a three-dimensional shape model of a different display method can be displayed side by side in each of a plurality of graphics windows. .
[0014]
Although two embodiments of the present invention have been described above, a program programmed to execute the three-dimensional shape processing according to the present invention as described above is stored in a removable storage medium, and the storage medium is stored in the storage medium. By attaching to an information processing apparatus such as a personal computer that could not perform the three-dimensional shape processing according to the present invention, or by transferring such a program to such an information processing apparatus via a network, The information processing apparatus can also perform three-dimensional shape processing according to the present invention.
[0015]
【The invention's effect】
As described above, according to the present invention, in the first, third, and fifth aspects of the present invention, the surface paint color is set for each type of the three-dimensional shape data, and the three-dimensional shape is set according to the set surface paint color. Since the surface of the model is applied, for example, when converting data, it is easy to visually check whether there is a gap between curved surfaces to form a surface, or whether there is no gap between curved surfaces and a solid shape Therefore, it can be easily determined whether the data conversion has been performed correctly.
Further, in the inventions according to claims 2, 4 , and 5 , a face painting color is set for each type of loop geometric data existing in the three-dimensional shape model, and the surface of the three-dimensional shape model is set according to the set face painting color. Since painting is performed, for example, it is possible to easily check visually whether a loop that was a flat surface or a quadric surface before data conversion becomes a free surface after data exchange. It is possible to easily determine whether it has been done correctly. In particular, in the case of wire frame display, a loop that looks like a flat surface or a quadratic surface at first glance, or a loop that has the same shape as a flat surface or a quadratic surface but whose internal representation is a free-form surface, can be easily confirmed. Therefore, it is useful not only immediately after exchanging data but also for checking the validity of the three-dimensional shape after executing arbitrary shape deformation processing.
According to the sixth aspect of the present invention, by attaching the storage medium to an information processing apparatus such as a personal computer, the information processing apparatus can perform three-dimensional shape processing .
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main part of a three-dimensional shape processing apparatus according to each embodiment of the present invention.
FIG. 2 is an operation flowchart of the three-dimensional shape processing method according to the first embodiment of the present invention.
FIG. 3 is another operation flow diagram of the three-dimensional shape processing method according to the first embodiment of the present invention.
FIG. 4 is another operation flow diagram of the three-dimensional shape processing method according to the first embodiment of the present invention.
FIG. 5 is another operation flowchart of the three-dimensional shape processing method according to the first embodiment of the present invention.
FIG. 6 is a screen diagram of a three-dimensional shape processing method according to the first embodiment of the present invention.
FIG. 7 is an operation flowchart of a three-dimensional shape processing method according to the second embodiment of the present invention.
[Explanation of symbols]
1 CPU
2 Memory 3 Shape data storage unit 4 Graphics information storage unit 5 Graphics processor 6 Display memory 7 Display device 8 Input device

Claims (6)

In a three-dimensional shape processing apparatus capable of setting a surface paint color of a three-dimensional shape model, a paint color setting means for setting a surface paint color for each surface or solid which is a type of three-dimensional shape data, and the paint color setting A three-dimensional shape processing apparatus comprising: a surface coating unit configured to perform surface coating of a three-dimensional shape model according to a surface coating color set by the unit. In a three-dimensional shape processing apparatus that can set the surface color of a three-dimensional shape model, the surface color for each plane, quadratic surface, or free-form surface that is a type of loop geometric data existing in the three-dimensional shape model A three-dimensional shape processing apparatus comprising: a paint color setting unit that sets a surface color; and a surface paint unit that performs surface painting of a three-dimensional shape model according to the surface paint color set by the paint color setting unit. A three- dimensional shape processing method implemented by a three- dimensional shape processing apparatus capable of setting a surface paint color of a three-dimensional shape model, wherein each surface or solid is a type of the three-dimensional shape data according to designation from an input device A method for processing a three-dimensional shape , comprising: setting a surface coating color on the surface, and performing a surface coating of a three-dimensional shape model according to the set surface coating color . A three- dimensional shape processing method implemented by a three- dimensional shape processing apparatus capable of setting a surface paint color of a three-dimensional shape model, wherein the geometric data of a loop existing in the three-dimensional shape model according to designation from an input device And a step of setting a surface coating color for each plane, quadric surface, and free-form surface, and a surface coating of a three-dimensional shape model according to the set surface coating color. Dimensional shape processing method . A program that causes a computer of a three-dimensional shape processing apparatus to execute each step of the three-dimensional shape processing method according to claim 3 or 4 . A computer-readable storage medium storing the program according to claim 5 .

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