WO2008035420A1 - Programme de génération de dessin en 2 dimensions, dispositif de génération de dessin en 2 dimensions et procédé de génération de dessin en 2 dimensions - Google Patents

Programme de génération de dessin en 2 dimensions, dispositif de génération de dessin en 2 dimensions et procédé de génération de dessin en 2 dimensions Download PDF

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Publication number
WO2008035420A1
WO2008035420A1 PCT/JP2006/318709 JP2006318709W WO2008035420A1 WO 2008035420 A1 WO2008035420 A1 WO 2008035420A1 JP 2006318709 W JP2006318709 W JP 2006318709W WO 2008035420 A1 WO2008035420 A1 WO 2008035420A1
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WO
WIPO (PCT)
Prior art keywords
line
dimensional drawing
attribute
dimensional
lines
Prior art date
Application number
PCT/JP2006/318709
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English (en)
Japanese (ja)
Inventor
Shigeru Takazawa
Masaharu Tosu
Akinori Mizuno
Syuuichi Nakashima
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2006/318709 priority Critical patent/WO2008035420A1/fr
Publication of WO2008035420A1 publication Critical patent/WO2008035420A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/10—Geometric effects
    • G06T15/20—Perspective computation

Definitions

  • the present invention relates to a 2D drawing generation program, a 2D drawing generation apparatus, and a 2D drawing generation method for generating a 2D drawing from a 3D model.
  • FIG. 1 As a related art related to the present invention, there is a 2D drawing drawing device that can automatically perform hidden line processing when drawing a 2D drawing from a 3D surface model (example) For example, see Patent Document 1). There is also an assembly drawing creation method and an assembly drawing creation device that can create an assembly drawing that also shows an arbitrary directional force of a three-dimensional shape in a short time, at low cost and with high accuracy (see, for example, Patent Document 2). ).
  • Patent Document 1 Japanese Patent Laid-Open No. 5-174106
  • Patent Document 2 JP-A-7-56971
  • the present invention has been made to solve the above-described problems, and a two-dimensional drawing generation program and a two-dimensional drawing capable of efficiently generating a two-dimensional drawing having appropriate information
  • An object of the present invention is to provide a generation device and a two-dimensional drawing generation method.
  • the present invention provides a two-dimensional drawing generation program that causes a computer to generate a two-dimensional drawing, and includes a plurality of linear forces having a predetermined attribute.
  • the line having the specified first attribute is changed to a line not having the first attribute.
  • the changing step and the two-dimensional drawing force obtained by the changing step are executed by a computer.
  • the deleting step for deleting the line having the first attribute is executed.
  • the present invention is also a two-dimensional drawing generation device that generates a two-dimensional drawing, and is configured to convert a three-dimensional model into a two-dimensional drawing having a plurality of line forces having predetermined attributes.
  • a conversion unit that converts a predetermined line in the three-dimensional model into a line having a first attribute; and a line having the first attribute in the two-dimensional drawing obtained by the conversion unit. Is specified, a change unit that changes the line having the specified first attribute to a line not having the first attribute, and the first dimension from the two-dimensional drawing obtained by the change unit.
  • a deletion unit that deletes lines having attributes.
  • the present invention is a two-dimensional drawing generation method for generating a two-dimensional drawing, wherein the three-dimensional model is converted into a two-dimensional drawing having a plurality of linear forces having predetermined attributes.
  • a conversion step for converting a predetermined line in the three-dimensional model into a line having a first attribute, and a line having the first attribute in the two-dimensional drawing obtained by the conversion step.
  • a change step of changing the line having the specified first attribute to a saddle line not having the first attribute, and the two-dimensional drawing force obtained by the change step A deletion step of deleting a line having the first attribute.
  • FIG. 1 is a block diagram showing an example of a configuration of a two-dimensional drawing generation apparatus according to the present embodiment.
  • FIG. 2 is a diagram showing an example of lines in a three-dimensional model.
  • FIG. 3 is a diagram showing an example of a two-dimensional drawing according to the present embodiment.
  • FIG. 4 is a table showing an example of a line attribute table according to the present embodiment.
  • FIG. 5 is a flowchart showing an example of the operation of the two-dimensional drawing generation process according to the present embodiment.
  • FIG. 6 is a diagram showing an example of a three-dimensional model before conversion according to the present embodiment.
  • FIG. 7 is a screen showing an example of a drawing setting screen according to the present embodiment.
  • FIG. 8 is a screen showing an example of the entire converted two-dimensional drawing according to the present embodiment.
  • FIG. 9 is a screen showing an example of a two-dimensional drawing after conversion according to the present embodiment.
  • FIG. 10 is a screen showing an example of a two-dimensional drawing after change processing according to the present embodiment.
  • FIG. 11 is a screen showing an example of a two-dimensional drawing after batch deletion of provisional lines according to the present embodiment.
  • FIG. 12 is a conceptual diagram showing an example of a work amount in a conventional two-dimensional drawing generation process.
  • FIG. 13 is a conceptual diagram showing an example of a work amount in the two-dimensional drawing generation process according to the present embodiment.
  • FIG. 1 is a block diagram showing an example of the configuration of the two-dimensional drawing generation apparatus according to the present embodiment.
  • the two-dimensional drawing generation apparatus includes an input unit 1, a processing unit 2, and a storage unit 3, and is realized by, for example, a PC (Personal Computer).
  • the input unit 1 is a user interface, which includes a 3D model display instruction unit 11, a drawing setting instruction unit 12, a viewpoint direction instruction unit 13, a provisional line change instruction unit 14, a provisional line batch deletion instruction unit 15, a save instruction unit 16 Is provided.
  • the processing unit 2 includes a 3D model display control unit 21, a conversion unit 22, a provisional line editing unit 23, and a storage unit 24.
  • the storage unit 3 includes a 3D model 31 and a 2D drawing 32.
  • the 2D drawing generation apparatus performs 2D drawing generation processing for generating a 2D drawing 32 based on the 3D model 31.
  • FIG. 2 is a diagram showing an example of a line in the three-dimensional model.
  • the outline is the same as the conventional one, and is a line that is visible from the viewing direction of the display among the lines indicating the outline of the shape.
  • Mutual hidden lines are lines that are invisible due to the shadow of other elements (components) from the viewpoint of the display, out of the lines indicating the outer shape of the shape.
  • the self-hidden line is the shadow of the self-element (part) from the viewpoint direction of the display. This is a line that becomes invisible.
  • Tangent line is the boundary line when two faces are smoothly connected. Here, if the angle formed by the tangent vector at the boundary between two surfaces is within a predetermined tolerance, the boundary line is a tangent line.
  • FIG. 3 is a diagram showing an example of a two-dimensional drawing according to the present embodiment.
  • the 2D drawing of this figure has line A, line B, line C, and line D. Of these, line A is a provisional line.
  • FIG. 4 is a table showing an example of the line attribute table according to the present embodiment.
  • the line attribute table in this figure represents the attributes of line A, line B, line C, and line D in FIG.
  • the line attribute table has a provisional flag, line type, line width, line color, start point (X coordinate), start point (Y coordinate), line direction vector (X direction), line direction vector (Y Direction) and line length.
  • the provisional flag is a flag indicating whether the line is a provisional line (1) or a non-provisional line (0).
  • the temporary flag for each line may be stored in a separate table.
  • a line type, a line width, and a line color at the time of display are set in advance as the provisional line attributes. If necessary, the line type, line width, and line color at the time of printing are set.
  • the provisional line is displayed with an attribute different from the other line (a line that is less conspicuous than the other line). Further, when printing the two-dimensional drawing 32, the provisional line is not printed or printed with an attribute different from other lines (a line that is more conspicuous than other lines).
  • the provisional flag is 0 for a line in the two-dimensional drawing 32
  • the line type, line width, and line color set as individual attributes of the line are applied.
  • the provisional flag is 1
  • the line type, line width, and line color set as individual attributes of the line are ignored, and the line type, line width, and line set as the provisional line attributes in advance are ignored. Color is applied.
  • FIG. 5 is a flowchart showing an example of the operation of the two-dimensional drawing generation process according to the present embodiment.
  • the 3D model display instruction unit 11 relates to the display of the 3D model 31.
  • the 3D model display control unit 21 reads the 3D model 31 and displays the 3D model 31 in accordance with the instruction from the 3D model display instruction unit 11 (Sl l).
  • FIG. 6 is a diagram showing an example of the three-dimensional model before conversion according to the present embodiment.
  • the viewpoint direction instructing unit 13 also receives an instruction for the viewpoint direction of the three-dimensional model 31 (S12).
  • the viewpoint direction may be a preset viewpoint direction, or may be set using a user operation and display by the 3D model display instruction unit 11.
  • the preset viewpoint directions are, for example, the six directions required for the development view.
  • each line in the 3D model 31 is classified into an outline, a mutual hidden line, a self-hidden line, and a tangent line based on the viewing direction of the display.
  • the drawing setting instruction unit 12 receives a drawing setting instruction that is a setting for conversion from the three-dimensional model 31 to the two-dimensional drawing 32 (S13).
  • FIG. 7 is a screen showing an example of the drawing setting screen according to the present embodiment. On this drawing setting screen, the user can input settings for each of the outline, mutual hidden, self-hidden, and tangent lines.
  • the user sets the force type force (check box 211) to be left in the two-dimensional drawing 32, the force type force to be used as a provisional line (check box 212), and the line type when not using the provisional line.
  • Force to take over the line type of the 3D model selection button 213), force to specify any line type as a line type when not to be a provisional line (selection button 214), line width when not to be a provisional line, 3D
  • the force (selection button 215) that takes over the line width of the model and the force (selection button 216) that specifies an arbitrary line width can be set as the line width when not making a provisional line.
  • the power unavailability (check boxes 221, 231), the tentative line unavailability (check boxes 222, 232), and provisional lines for the 2D drawing 32. If you do not want to specify any line type (list box 223, 233), if it is not a provisional line, the line width of the 3D model (selection buttons 225, 235), If it is not a temporary line, it is possible to specify an arbitrary line width (select buttons 226, 236) as the case width.
  • the force dynamism that remains in the 2D drawing 32 (check box 241), the force dynamism to be used for provisional lines (check box 242), and the allowable angle error of the surface The difference (numeric input box 247) can be set.
  • the self-hidden line and the tangent line in the three-dimensional model 31 do not remain in the two-dimensional drawing 32.
  • the outline in the 3D model 31 remains in the 2D drawing 32, and the line type and line width of the outline in the 3D model 31 are inherited.
  • the mutual hidden line in the 3D model 31 remains in the 2D drawing 32 and becomes a provisional line, but the line type specified by the user is set as an attribute when the provisional line disappears, and the 3D model 31 The width of the hidden line is inherited from the bow I.
  • the conversion unit 22 converts the 3D model 31 displayed by the 3D model display control unit 21 in accordance with instructions from the drawing setting instruction unit 12 and the viewpoint direction instruction unit 13, and 2
  • the dimensional model 32 is stored in the storage unit 3 (S14).
  • FIG. 8 is a screen showing an example of the entire converted two-dimensional drawing according to the present embodiment. This figure shows the result of transforming the 3D model in Fig. 6.
  • FIG. 9 is a screen showing an example of the converted two-dimensional drawing according to the present embodiment. This figure is an enlarged view of a circled portion 100 in FIG.
  • This two-dimensional drawing 32 is the result of conversion according to the drawing settings described above, with the outlines remaining, the mutual hidden lines left as provisional lines, and the self-hidden lines and tangent lines removed. .
  • the solid line portion 101 represents a line converted from the outline line and is displayed with the same attribute as the outline line
  • the dotted line parts 102, 103, and 104 represent provisional lines converted from mutual hidden lines. Are displayed as inconspicuous lines according to preset provisional line attributes.
  • the provisional line change instruction unit 14 receives an instruction to change the provisional line attribute from the user, and the provisional line editing unit 23 is converted by the conversion unit 22 according to the instruction from the provisional line change instruction unit 14.
  • the provisional line is changed in the two-dimensional drawing 32 (S15).
  • the change process is a process in which the user selects a provisional line and changes the selected line to a line with an attribute set individually (sets the provisional flag of the selected line to 0). Or, when the user selects a line other than the provisional line, the selected line is changed to a provisional line (the provisional flag of the selected line is set to 1).
  • FIG. 10 is a screen showing an example of the two-dimensional drawing after the change processing according to the present embodiment.
  • This two-dimensional drawing 32 shows a case where the dotted line portion 102 in FIG. 9 is selected by the user.
  • the dotted line portion 102 is obtained by converting the mutual hidden lines in the three-dimensional model.
  • the provisional line editing unit 23 sets the line attribute previously set as a mutual hidden line by setting the provisional flag of the dotted line portion 102 to 0, and the dotted line portion 102 Change part 102 to the original dotted line part 112.
  • the provisional line editing unit 23 can change the selected line to a provisional line.
  • the provisional line batch deletion instructing unit 15 determines whether or not the user has received an instruction to delete provisional lines all at once (change processing has been completed). In the case (S16, NO), the process returns to the process S15, the temporary line is continuously edited, and if an instruction is received (S16, YES), the process proceeds to the next process.
  • FIG. 11 is a screen showing an example of a two-dimensional drawing after temporary deletion of provisional lines according to the present embodiment.
  • the dotted line portions 103 and 104 that are provisional lines in FIG. 10 are deleted at once, and the solid line portion 101 and the dotted line portion 112 that are non-provisional lines are left.
  • the save instruction unit 16 also accepts an instruction to save the two-dimensional drawing 32, and the save unit 24 temporarily determines the two-dimensional drawing 32 in the storage unit 3 in accordance with the instruction from the save instruction unit 16.
  • the edited result is updated by the line editing unit 23 (S18), and this flow ends.
  • FIG. 12 is a conceptual diagram showing an example of the workload in the conventional two-dimensional drawing generation process.
  • the vertical axis represents the number of hidden lines in the two-dimensional drawing. All hidden lines remain in the 2D drawing obtained by setting the hidden lines. Therefore, until the target 2D drawing is reached, the user needs to delete the unnecessary hidden lines, but this amount of work is generally large.
  • the hidden line information is lost, so it is impossible to create a target 2D drawing.
  • FIG. 13 is a conceptual diagram showing an example of the work amount in the two-dimensional drawing generation process according to the present embodiment.
  • the vertical axis represents the number of hidden lines in the two-dimensional drawing.
  • the preset classification hidden lines are provisional lines. Until the target 2D drawing is reached, it will be necessary to change the provisional lines to the hidden lines, but the amount of work is generally small.
  • the conventional 2D drawing is 100. It is possible to create a 2D drawing in which only the necessary lines are drawn in about 1Z4 time for the generation process.
  • the conversion step corresponds to the processing S14 in the embodiment.
  • the change step corresponds to the process S15 in the embodiment.
  • the deletion step corresponds to step S17 in the embodiment.
  • the first attribute corresponds to the provisional flag being 1 in the embodiment.
  • the first expression information and the second expression information correspond to the line type, line width, and line color in the embodiment.
  • the changing unit and the deleting unit correspond to the provisional line editing unit in the embodiment.
  • the 2D drawing generation apparatus can be easily applied to a 3D CAD apparatus, and the performance of the 3D CAD apparatus can be further improved.
  • the 3D CAD device includes, for example, a PC (Personal Computer), a sano, a workstation, and the like. Can be.
  • a program for executing the above-described steps in a computer constituting the two-dimensional drawing generation apparatus can be provided as a two-dimensional drawing generation program.
  • the computer constituting the two-dimensional drawing generation apparatus can be executed.
  • the computer-readable recording medium may be an internal storage device such as a ROM or RAM, a CD-ROM, a flexible disk, a DV D disk, a magneto-optical disk, an IC card, or the like. It includes portable storage media, databases holding computer programs, other computers and their databases, and transmission media on the line.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computing Systems (AREA)
  • Geometry (AREA)
  • Computer Graphics (AREA)
  • General Physics & Mathematics (AREA)
  • Processing Or Creating Images (AREA)

Abstract

L'invention concerne un programme de génération de dessin bidimensionnel amenant un ordinateur à générer un dessin bidimensionnel. Le programme de génération de dessin bidimensionnel amène l'ordinateur à exécuter : une étape de conversion pour convertir un modèle tridimensionnel en un dessin bidimensionnel formé par une pluralité de lignes ayant des attributs prédéterminés et convertir une ligne prédéterminée dans le modèle tridimensionnel en une ligne ayant un premier attribut ; une étape de modification pour modifier la ligne ayant un premier attribut spécifié en une ligne n'ayant pas le premier attribut dans le dessin bidimensionnel obtenu par l'étape de conversion lorsque l'une des lignes ayant le premier attribut est spécifiée ; et une étape d'effaçage pour effacer la ligne ayant le premier attribut du dessin bidimensionnel obtenu par l'étape de modification.
PCT/JP2006/318709 2006-09-21 2006-09-21 Programme de génération de dessin en 2 dimensions, dispositif de génération de dessin en 2 dimensions et procédé de génération de dessin en 2 dimensions WO2008035420A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/318709 WO2008035420A1 (fr) 2006-09-21 2006-09-21 Programme de génération de dessin en 2 dimensions, dispositif de génération de dessin en 2 dimensions et procédé de génération de dessin en 2 dimensions

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Application Number Priority Date Filing Date Title
PCT/JP2006/318709 WO2008035420A1 (fr) 2006-09-21 2006-09-21 Programme de génération de dessin en 2 dimensions, dispositif de génération de dessin en 2 dimensions et procédé de génération de dessin en 2 dimensions

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013045127A (ja) * 2011-08-22 2013-03-04 Fujitsu Ltd 図面作成プログラム，装置および処理方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09128565A (ja) * 1995-11-06 1997-05-16 Daitetsuku:Kk 物体の三次元投影状態における稜線の線種決定方法
JP2003187263A (ja) * 2001-12-17 2003-07-04 Fujitsu Ltd 投影制御処理装置およびコンピュータプログラム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09128565A (ja) * 1995-11-06 1997-05-16 Daitetsuku:Kk 物体の三次元投影状態における稜線の線種決定方法
JP2003187263A (ja) * 2001-12-17 2003-07-04 Fujitsu Ltd 投影制御処理装置およびコンピュータプログラム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013045127A (ja) * 2011-08-22 2013-03-04 Fujitsu Ltd 図面作成プログラム，装置および処理方法

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