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Dual Contouring Demo Qian-Yi Zhou (firstname.lastname@example.org) Version: 1.01, last updated 10/5/2010 Project page: http://graphics.usc.edu/~qianyizh/projects/dualcontouring.html http://graphics.usc.edu/~qianyizh/projects/buildingreconstruction.html http://graphics.usc.edu/~qianyizh/software.html I. Introduction This program is a demo of 2.5D dual contouring, based on paper '2.5D Dual Contouring: A Robust Approach to Creating Building Models from Aerial LiDAR Point Clouds', published on ECCV 2010. All the related resources can be found on the project page. II. Usage The configuration of the demo is stored in config.ini which should be put in the same directory of the executable program. In the configuration file, items mean: [DualContouring] WorkingDir ="..\models\" -- Working directory, in which the program will traverse all the files ending in "xyzn" and apply our algorithm to produce "obj" files GridLength =1.0 -- Unit length of the uniform grid AcceptNumber =4 -- During segmentation, this is the minimum point number of a potential roof cluster RelativeDistance =100.0 RelativeZ =1.0 -- Segmentation takes two points in the same cluster iff ( distance < RelativeDistance && height_difference < RelativeZ ) Weight =1.0 -- Weight w to balance 2D boundary error term and 3D surface error term ErrorTolerance =1.0 -- Threshold used to control bottom-up simplification SingularTolerance =0.15 -- Threshold used to determine if singular treatment is needed when solving matrix WallRectangle =0 AntiNonManifold =1 SnappingErrorTolerance =1.2 SnappingMinimumLength =7.0 -- Advanced functions not supported in this demo ******** for a fully functional program, visit our website ******** http://graphics.usc.edu/~qianyizh/projects/buildingreconstruction.html III. Release Notes 1.01 Fixed a bug that may cause program crash. 1.00 A first console executable file, containing all the basic functions.