基于 Z-buffer 算法优化的大型变电站场景模型 快速线消隐方法

针对现有三维模型消隐方法面向大规模三维场景模型应用中存在的计算复杂、耗时长等缺陷， 本文提出了基于改进 Z-buffer 算法对大型变电站场景消隐的快速可视化方法。首先，为了简化计算，将场景模 型数据整合并重构；其次，通过透视投影变换将变电场景模型像素化；进一步，基于 Z-buffer 算法高效的像素 化计算特性提出了快速模型筛选方法，从而得到变电场景的子模型遮挡关系。最后，实验中将所得遮挡关系列 表融合现有消隐算法，结果表明本文提出的方法能够大幅度提升消隐的运算性能。

Fast hidden line removal method for large-scale 3D substation scene model based on Z-buffer algorithm optimization

In order to overcome the defects of the application of hidden lines elimination to large-scale 3D scene models, such as high complexity calculation and high time consumption, in this article, a time efficient visualization method was presented for the hidden-line elimination of large substation scenes based on the improved Z-buffer algorithm. First, the original scene model data was integrated and then restructured to simplify the calculation. Secondly, the substation scene model was pixelated through perspective projection transformation. Then a Z-buffer algorithmbased model selection method was proposed to obtain the occlusion relationship of the sub-model of the substation scene, which took the advantage of its pixilation property. Finally, the obtained occlusion relationship lists were merged to the existing hidden line elimination algorithm. Our experimental results prove that the proposed approach can greatly enhance the computing performance of the application of hidden lines elimination to large-scale 3D scene models. Finally, the sub-model occlusion relationship of the substation scene was obtained.