Dissertation
Dissertation > Industrial Technology > Building Science > Building the basic sciences > Electronic computer in the building

Building geometry and discrete spline modeling technology research

Author CaiZuo
Tutor GaoShuMing;ZuoHongWei
School Zhejiang University
Course Applied Computer Technology
Keywords Building geometry Quadrilateral mesh Main lines of curvature Feature Geodesic Template Any plane Smoothness Deformation Error Subdivision Developable surface with Singular point T- Splines T- grid Manifolds ebj format T- grid local subdivision
CLC TU17
Type Master's thesis
Year 2012
Downloads 27
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With the rapid socio-economic development, the modern shape of the building become more complex, in order to save costs, reduce the difficulty of design and construction , geometric design methods are increasingly being used to generate , analyze and process models . In this article , we focused on building model mesh generation , optimization and design aspects in conducting research and improving some algorithms. In the mesh generation , we use the principal curvature line , interactive set of characteristics , feature points and the direction of the boundary curve as a constraint parameterized by the template method to generate pure quadrilateral mesh, so that the overall direction of the grid along the direction of the principal curvatures , and through the mesh insert in the original principal curvature lines and precise geodesic points , so that the original mesh segmentation is more accurate. In the model optimization, we improved Pottmann et al optimization algorithms to improve efficiency of the algorithm , the algorithm increases the scope and flexibility through segmentation and optimization iterations architectural surface design , construction needs to get realistic model ; improved developable surfaces with singularities near the model generation method , so that the surface with better able to piece together . The design of the model , we propose the concept of extended T- mesh , the mesh can be used similar to the T- obj file storage format to facilitate T- spline representation ; based on the extended T- mesh grid , proposed a new T- spline knot insertion algorithm, by dividing it into mesh segmentation and blending function subdivision two processes , simplifying the algorithm.

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