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Triangulation of Data Sets

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Triangulation of Data Sets
Chapter Eight: Meshing of 3-D Data Clouds for Object Description --- Triangulation of Data Sets



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Chapter 9: Triangulation



Mesh Objects



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Chapter 9: Triangulation



Why Need Triangular Meshes?

A simple piecewise linear approximation of 3D shapes of complex objects Appropriate for processing in graphics hardware Suitable for deformation and manipulation of the object surfaces



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Chapter 9: Triangulation



Main Topics

Planar triangulation Voronoi Diagram Delaunay Triangulation 3-D triangulation based on a physical model --- balloon inflation Marching Cubes



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Chapter 9: Triangulation



Triangulation of Terrain Data



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Chapter 9: Triangulation



Planar Triangulation



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Chapter 9: Triangulation



Voronoi Diagrams



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Chapter 9: Triangulation



Dual Graph of a Voronoi Diagram



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Chapter 9: Triangulation



Edge Flipping



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Chapter 9: Triangulation



Incremental Triangulation Algorithm



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Chapter 9: Triangulation



Progressive Balloon Inflation Balloon inflation for surface fitting



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Chapter 9: Triangulation



Physical Model for Balloon Inflation



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Chapter 9: Triangulation



Subdivision of Triangular Faces



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Chapter 9: Triangulation



Touching of Balloon at Data



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Chapter 9: Triangulation



Approximating Errors



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Chapter 9: Triangulation



Adaptation of Local Fitting



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Chapter 9: Triangulation



Subdivision for Fitting



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Chapter 9: Triangulation



Hierarchy of Triangular Meshes



Meshes with triangles of different sizes



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Chapter 9: Triangulation



Contouring Using Marching Squares



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Chapter 9: Triangulation



Marching Squares Cases



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Chapter 9: Triangulation



Ambiguity in Connecting Edges



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Chapter 9: Triangulation



Marching Cubes



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Chapter 9: Triangulation



Marching Cubes Cases



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Chapter 9: Triangulation



Marching Cubes Cases



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Chapter 9: Triangulation



Ambiguity in Connecting Edges



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Chapter 9: Triangulation



An Example of Extracted Isosurfaces



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Chapter 9: Triangulation



Marching Cubes for 3-D Data Clouds



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Chapter 9: Triangulation



An Example of Extracted Meshes



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