A 3D visualization method for high-curvature linear entity
LIU Zhao1, GAO Peichao1, MIN Shiping2, ZHAO Long2, LUO Zhide1
1. Institute of Geospatial Information, Tsinghua University, Beijing 100084, China; 2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
Abstract:The linear model is among the vital models in 3D visual scene, and its degree of fineness determines the visual effect of the scene. Common methods for constructing linear models can be divided into integral model method and spliced model method; nevertheless, for large-curvature linear models, neither method is ideal. The vertex coordinates and texture mapping are difficult to control when the integral model method is employed, and space between models and texture overlaps is inevitable when the other methods are used. A 3D visualization method for high-curvature linear entity is proposed in this paper. In the phase of geometric modeling, the vertex coordinates, normal vectors and index data are calculated for model lofting based on path and cross section. In the phase of texture mapping, textures are made by creating a mapping between vertices on the model and pixels on the photo. The results show that the algorithm can be utilized to make large-curvature linear models like railway roadbed models, and the algorithm has the merits of high accuracy, requirement of less manual work and good visual effect.
刘钊, 高培超, 闵世平, 赵龙, 罗智德. 一种大曲率线状实体的三维可视化方法[J]. 国土资源遥感, 2014, 26(3): 43-47.
LIU Zhao, GAO Peichao, MIN Shiping, ZHAO Long, LUO Zhide. A 3D visualization method for high-curvature linear entity. REMOTE SENSING FOR LAND & RESOURCES, 2014, 26(3): 43-47.
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