JP2005302058A - Method for creating two-dimensional cross-sectional shape data from three-dimensional data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To create two-dimensional cross-sectional shape data from three-dimensional data. <P>SOLUTION: By previously inputting a plurality of cross section creation positions in numerical values by selecting a cross section direction for three-dimensional data present in a work space of a three-dimensional CAD, the inputted information is tentatively accumulated; a program is executed when the data input is ended; a two-dimensional cross-sectional shape is automatically created in the designated direction and position and is automatically turned to X-Y coordinates being two-dimensional CAD information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of creating two-dimensional cross-sectional shape data from three-dimensional data in design using CAD.

  FIG. 4 shows a flowchart of a conventional method for creating two-dimensional cross-sectional shape data from three-dimensional data. In FIG. 4, the cross-sectional direction is selected in step 1, cross-sectional position data is input in step 2, a cross-sectional shape is created in step 3, and rotation to a two-dimensional XY coordinate is performed in step 4.

  That is, a complicated curved surface is created using three-dimensional data, and cross-sectional shape information necessary for two-dimensional representation is extracted from the three-dimensional data to create a two-dimensional shape drawing. In this case, the operation of extracting one cross-sectional shape from the three-dimensional data is to create a cross-sectional shape after instructing the cross-sectional direction and instructing the cross-section creation position.

  Further, the cross-sectional shape is rotated so as to be expressed by the XY coordinates of the two-dimensional CAD. These operations had to be repeated for the required number of cross sections, which was a very laborious operation.

  In the conventional method, when creating a plurality of cross-sectional shapes, it is necessary to select the cross-sectional direction, input the cross-sectional position, and rotate the XY coordinates after the cross-sectional shape is created. It had to be repeated several times and was a very time-consuming work.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method capable of automatically creating cross-sectional shape data of a two-dimensional CAD only by specifying a cross-sectional direction and a cross-sectional position.

  In order to achieve the above object, the present invention selects a cross-sectional direction for three-dimensional data existing in the work space of a three-dimensional CAD and inputs a plurality of cross-section creation positions numerically in advance. The input information is temporarily stored, and the program is executed when the data input is completed, so that a cross-sectional shape is automatically created in the designated direction and position, and further two-dimensional CAD information is used. It was set as the structure rotated automatically to a certain XY coordinate.

  As described above, according to the present invention, it is possible to automatically create cross-sectional shape data that can be utilized in two-dimensional CAD simply by inputting a cross-sectional direction and position. Therefore, even if the number of cross-sectional shapes to be created is large, other work can be performed while the cross-section is created and the XY coordinates are rotated, so that the design work can be made more efficient.

  In the first invention of the present invention, the three-dimensional data existing in the work space of the three-dimensional CAD is selected by selecting a cross-sectional direction and inputting a plurality of cross-section creation positions in advance as numerical values. The input information is temporarily stored, and when the data input is completed, the program is executed to automatically create a cross-sectional shape in the instructed direction and position, and further, XY which is information of two-dimensional CAD By automatically rotating the coordinates, two-dimensional sectional shape data can be efficiently created.

  Hereinafter, a method of creating two-dimensional cross-sectional shape data from three-dimensional data according to an embodiment of the present invention will be described with reference to FIGS.

(Embodiment)
FIG. 1 is a flowchart of a method for creating two-dimensional cross-sectional shape data from three-dimensional data according to an embodiment of the present invention. Step 1 is a section direction selection, Step 2 is a section direction selection, Step 3 is a process of automatically creating a section and rotating to XY coordinates.

  As shown in FIG. 1, according to the present invention, a cross-sectional shape that can be automatically utilized in two-dimensional CAD can be created by selecting a cross-sectional direction and inputting a cross-sectional position. Next, an example of a procedure of a method for creating two-dimensional cross-sectional shape data from three-dimensional data will be described with reference to FIG.

  As shown in FIG. 2, first, a program start command incorporated in 3D CAD software is selected. Thereby, a screen for selecting the cross-sectional direction is displayed.

  Next, when a corresponding item is selected, a screen for inputting a cross-sectional position is displayed.

  Here, the numerical value of the cross-sectional position is input. When the distance from the absolute position (0, 0, 0) is input, the numerical value enters a waiting state for inputting the next numerical value. Sequentially input necessary numerical values, and input X when finishing the input.

  The program starts by X input, and automatically creates a cross-sectional shape in the specified direction and position, and further rotates to XY coordinates for use in two-dimensional CAD.

  Note that when a plurality of cross-sectional shapes are created and rotated to XY coordinates, the cross-sectional shapes may overlap and be difficult to distinguish. In order to prevent this, it becomes easier to discriminate by changing the color tone of the cross-sectional shape or by moving the cross-sectional shape by a certain distance as shown on the right end side in FIG.

  With the above configuration, the time for creating the two-dimensional cross-sectional shape data from the three-dimensional data is reduced and can be used effectively.

  The method of creating the two-dimensional cross-sectional shape data from the three-dimensional data according to the present invention can be designed so that other work can be performed while the cross-section is created and the XY coordinates are rotated even if the number of cross-sectional shapes to be created is large. Since work efficiency can be improved, it is useful as a method for creating two-dimensional cross-sectional shape data from three-dimensional data.

Flowchart of a method for creating two-dimensional cross-sectional shape data from three-dimensional data in an embodiment of the present invention The figure which shows the program procedure of FIG. The perspective view of the example which created cross-sectional shape by the method of FIG. A flowchart of a conventional method for creating two-dimensional cross-sectional shape data from three-dimensional data

Explanation of symbols

A 3D data B Coordinate C XY coordinate D YZ coordinate E XZ coordinate F Cross sectional shape G Absolute position (0, 0, 0)

Claims (1)

For 3D data existing in the 3D CAD workspace, select the cross-sectional direction and enter numerical values for multiple cross-section creation positions, temporarily store the input information, and complete the data input By executing the program at this time, a cross-sectional shape is automatically created in the designated direction and position, and further rotated automatically to the XY coordinates of the two-dimensional CAD information. A method of creating two-dimensional cross-sectional shape data.

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