通過對STL三角網(wǎng)格模型和X3D語法規(guī)范的分析與研究，根據(jù)X3D對三角形的相關(guān)定義和描述，提出了一種將STL三角網(wǎng)格模型轉(zhuǎn)換為X3D格式的算法。該算法在實現(xiàn)將STL轉(zhuǎn)化為X3D的同時，又完成了對STL文件中冗余數(shù)據(jù)的處理，使得轉(zhuǎn)換后的X3D文件大小相當于原來STL文件大小的1/7左右，非常有利于三角網(wǎng)格模型在網(wǎng)絡上的傳輸和操作。最后，以Java作為開發(fā)系統(tǒng)平臺，運用Java3D及其裝載器組件實現(xiàn)了轉(zhuǎn)換后的X3D的裝載和瀏覽，從而使STL文件可以在Internet環(huán)境下實現(xiàn)產(chǎn)品信息共享和可視化的操作。

Abstract:

?Via the analysis and research about STL triangular mesh model and X3D syntax meanwhile according to the triangle defined and described by the X3D，the paper provides a algorithm which can convert the STL triangular mesh model into X3D format. The algorithm can realize converting the STL into X3D and handling the redundant data of the STL file as well. Doing like this makes the X3D file size converted is equivalent to the about 1 / 7 of the original ，which is conducive to the transmission and operation of the triangular mesh model in network. Finally，using Java as a development platform and applying Java3D and the load components to implement the loading and browsing of the X3D converted. Therefore，STL files can complete the product information sharing and visual operations in the Internet environment.