输入一个3D网格,通过计算得到另一个和输入大致相同且满足一定质量要求网格。 曲面的Remesing目标有以下两点: 根据需求减少曲面的复杂度 改善曲面的质量(Mesh Quality) 曲面的质量(Mesh Quality)指的是一些非拓扑属性(Non-Topological Properties),例如采样密度,正则性,大小,方位(Orientation),对齐性(原文为Alignment,不...
Mesh approximation algorithms:网格逼近通过一系列的网格优化策略来最小化某个定义明确的错误量。 Vertex Clustering Vertex Clustering的的基本思想是:给定一个逼近容忍度遍历ε,然后将物体表面的包围空间划分成一些直径小于ε的小晶胞(Cell)。对于每一个小晶胞(Cell),计算出一个坐标来代表这个小晶胞(Cell)。同一个小...
第一章:曲面表达(Surface Representation) 几何处理(geometry processing)的主要任务是将各种算法应用于几何模型之上。本章主要讨论的是几何模型的表达方式,具有较多抽象的数学讨论,但是较为体系化地阐述了各种曲面表达方式的缘由、优缺点和特性。 1.1 曲面的定义和属性 从高屋建瓴的视角看,一个曲面(surface)的表达有两...
typedefCGAL::Extract_predicates_inexact_constructions_kernelK;typedefCGAL::Surface_mesh<K::Point_3>Mesh;namespacePMP=CGAL::Polygon_mesh_processing;Meshmesh;PMP::parameters::vertex_point_map(get_property_map(CGAL::vertex_point,mesh)).face_index_map(get_property_map(CGAL::face_index,mesh)).clip_...
namespace PMP = CGAL::Polygon_mesh_processing; namespace Params = PMP::parameters;voidread_mesh(Mesh& mesh,std::stringfilename){std::ifstreaminput(filename);if(!input || !(input >> mesh) || !CGAL::is_triangle_mesh(mesh)) {std::cerr<<"Not a valid input file"<<std::endl;return;...
1.1 Surface Definition and Properties(曲面的定义及特征) The commondefinitionof asurfacein the context of computer graphics applications is an orientable continuous 2D manifold(流形) embedded in R3." Intuitively, this can be understood asthe boundary surface of a non-degenerate 3D solidwherenon-degen...
yys Polygon Mesh Processing 笔记 the input surface is obtained by discrete sampling(evaluation / probing)||establish continuity ( to generate a mathematical surface representation). This requires building a consistent neighborhood relation between the samples....
Contoured Mesh是通过体积测定数据集(Volumetric Dataset)导出的网格模型。理论上导出的模型是一个流形(Manifold),并且是密闭的(Watertight)。然而也会出现像下图那样的“畸形”(书中称之为 Small Spurious Handle )。 体积测定数据(Volumetric Data)通常出现在构造实体几何(Constructive Solid Geometry)中,或者在医学图像...
Issue Details In this testsuite, we get a warning that the Epic_converter returns a pair of a default constructed sphere and false to indicate that the sphere is default constructed. Do we check and this is a false alert? If so, shall we...
Polygon_mesh_processing/hole_filling_example_SM.cpp Polygon_mesh_processing/hole_filling_visitor_example.cpp Polygon_mesh_processing/stitch_borders_example.cpp Polygon_mesh_processing/compute_normals_example.cpp Polygon_mesh_processing/point_inside_example.cpp Polygon_mesh_processing/tri...