Large data volume IGS industrial model Polygon conversion method for VR engine

Abstract

The invention discloses a large data volume IGS industrial model Polygon conversion method for a VR engine. The method comprises the following steps: 1) exporting IGS format models from CAD software;2) carrying out batch conversion on the IGS format models to obtain quadrilateral Polygon models; 3) carrying out batch optimization processing on polygonal segment numbers and vertexes of the Polygonmodels through a Polygon edge removal tool; 4) carrying out conversion on narrow facets of the models according to model conversion requirements of a virtual platform, and importing a real-time rendering engine to observe results; 5) carrying out batch UV calculation on the models without Logo textures through a UV calculation plug-in 3D-IO Flatiron according to curvature degrees of the models, and carrying out individual UV calculation on the models with the Logo textures, so that complete and unified UV information is obtained; 6) setting collision attributes and physical attributes in 3dsmax according to requirements of a virtual engine to be used; and 7) importing edited three-dimensional models into the virtual engine platform and carrying out assembly to form a VR model. The conversion method provided by the invention has the advantage that the conversion efficiency and accuracy can be improved.

Description

Technical field [0001] The invention relates to computer simulation technology, in particular to a POLYGON conversion method of a large data volume IGS industrial model facing a VR engine. Background technique [0002] With the rapid development of information technology, virtual reality technology and computer technology, three-dimensional lightweight model technology has been widely used in many ship design and construction units to support ship design research and development and virtual simulation analysis, and gradually change the design methods of the shipbuilding industry. Design method and management mode, improve design level, shorten design cycle, and improve design quality. [0003] The three-dimensional design and assembly structure of large ships are complex. They are generally divided according to the total section of the ship, and then divided by function. They are the overall shape, hull structure, equipment, pipelines, cables, etc. As the depth of the three-dimensi...

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Problems solved by technology

[0006] (2) For the second method, due to improper conversion method, the model data will be missing and the surface will be incomplete, resulting in distortion of the front and rear normal directions of the patch or cracks on the surface;

[0007] (3) For the surface model, the number of surface segments cannot be adjusted in batches according to the curvature requirements of the surface to meet the requirement of reducing the number of model faces, and the virtual platform needs to make high, medium and low LOD models according to the distance of the camera;

[0008] (4) For the converted MESH model, UV solution cannot be conveniently performed, and UV solution is the condition for obtaining correct lighting information in the virtual engine and the basis of texture mapping, and is a necessary process for importing into the virtual engine

[0009] The above description shows the shortcomings of the traditional large data volume 3D lightweight model conversion method, which leads to the failure of the normal conversion of the CATIA model of the whole ship

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