Two-dimensional DXF (drawing exchange file) format based three-dimensional realistic display method of parts

A file format and display method technology, applied in the field of image processing, can solve the problems of non-disclosure, inconvenient observation of three-dimensional structures, and inability to process

Inactive Publication Date: 2014-04-30
SHENYANG AEROSPACE UNIVERSITY
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AI Technical Summary

Problems solved by technology

This type of graphics is often a two-dimensional graphic drawn by AutoCAD, and it is not convenient for us to observe its three-

Method used

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  • Two-dimensional DXF (drawing exchange file) format based three-dimensional realistic display method of parts
  • Two-dimensional DXF (drawing exchange file) format based three-dimensional realistic display method of parts
  • Two-dimensional DXF (drawing exchange file) format based three-dimensional realistic display method of parts

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Embodiment Construction

[0044] Such as Figure 1 to Figure 3 As shown, the present invention takes and carries out as follows: based on the part three-dimensional real of two-dimensional DXF file format

[0045] Real sense display method, the specific steps are as follows:

[0046] Step 1: Read the data of the busbar and the axis in the DXF file format; the graphic construction of the part of the revolving body is actually to know the axis and the busbar, and construct the corresponding rotating surface.

[0047]Step 2: Use the data read in step 1 to construct a surface of revolution;

[0048] Step 2.1: Use the arc cutting algorithm to calculate the center coordinates of the arc:

[0049] Step 2.2: Calculate the coordinates of the surface of revolution using the rotational forming algorithm:

[0050] Step 2.2.1: Transversally cut the known curve:

[0051] Step 2.2.2: Carry out vertical cutting on the points obtained by horizontal cutting:

[0052] Step 3: Use the normal vector algorithm to perfo...

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Abstract

The invention belongs to the technical field of image processing, and particularly relates to a two-dimensional DXF (drawing exchange file) format based three-dimensional realistic display method of parts. The three-dimensional realistic display method specifically includes the steps of 1), reading data of a bus and an axis in the DXF format; 2), structuring a rotating surface by utilizing the data read in the step 1); 2.1), calculating center coordinates of an arc by means of a circular arc cutting algorithm; 2.2), calculating the coordinates of the rotating surface by means of a rotation to formation algorithm; 2.2.1), subjecting a known curve to cross cutting; 2.2.2), subjecting points obtained from the cross cutting to lengthwise cutting; 3), performing lighting effect processing by means of a normal vector algorithm; 4), displaying a three-dimensional entity by means of OpenGL performance functions. Therefore, three-dimensional realistic display of the parts can be realized.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a three-dimensional realistic display method for parts based on a two-dimensional DXF file format. Background technique [0002] In the design and manufacture of actual engineering parts, the rotating body type parts processed by turning and boring occupy a large proportion. In the computer-aided turning system, the main work is carried out around this type of parts. This type of graphics is often two-dimensional graphics drawn by AutoCAD, and it is not convenient for us to observe its three-dimensional structure. The default file format of AutoCAD is DWG format, which is not open to the outside world by AutoCAD, and we cannot process it. [0003] Computer graphics is an emerging subject that has developed rapidly and is widely used in recent years. It mainly studies the principles, algorithms and systems of graphics input, representation, transformation, ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T19/00
Inventor 张滢
Owner SHENYANG AEROSPACE UNIVERSITY
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