76 lines
4.0 KiB
Plaintext
76 lines
4.0 KiB
Plaintext
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VCGLib http://vcg.sf.net o o
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Visual and Computer Graphics Library o o
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_ O _
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Copyright(C) 2004 \/)\/
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Visual Computing Lab http://vcg.isti.cnr.it /\/|
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ISTI - Italian National Research Council |
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\
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Metro, All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
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for more details.
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--- Synopsis ---
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Metro is a tool designed to evaluate the difference between two triangular meshes.
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Metro adopts an approximated approach based on surface sampling and point-to-surface distance computation.
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Please, when using this tool cite the following reference:
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P. Cignoni, C. Rocchini and R. Scopigno
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"Metro: measuring error on simplified surfaces"
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Computer Graphics Forum, Blackwell Publishers, vol. 17(2), June 1998, pp 167-174
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For any question about this software please contact:
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Paolo Cignoni ( p.cignoni@isti.cnr.it )
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--- General Info ---
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Metro is a tool designed to evaluate the difference between two triangular meshes.
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Metro adopts an approximated approach based on surface sampling and point-to-surface distance computation.
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Three different surface sampling methods are implemented:
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* Montecarlo sampling (pick k random samples in the interior of each face)
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* Subdivision sampling (recursively subdivide each face along the longest edge and choose the sample in the center of each cell)
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* Similar Triangles sampling (subdivide each face F in k polygons similar to F and sample the face in correspondence with the vertices of these polygons, internal to F)
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Note that the three methods described above are used to sample only the interior of each face.
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A different scheme is used to sample vertices and edges: vertices are sampled in the straightforward manner,
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while edges are sampled by uniformly interleaving samples along each edge.
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--- Basic usage ---
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Metro is a command-line tool which allows the user to select among different sampling schemes.
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A list of the command-line parameters accepted by the tool is shown in the following.
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Usage: Metro file1 file2 [opts]
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where "file1" and "file2" are the input meshes in PLY or STL format, and opts can be:
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-v disable vertex sampling
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-e disable edge sampling
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-f disable face sampling
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-u does not ignore unreferred vertices (sample also unreferenced vertices
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(useful for sampling point clouds against meshes)
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-Sx set the face sampling mode
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where x can be:
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-S0 montecarlo sampling
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-S1 subdivision sampling
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-S2 similar triangles sampling (Default)
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-n# set the required number of samples (overrides -A)
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-a# set the required number of samples per area unit (overrides -N)
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-c save computed error as vertex colour and quality in two ply files
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-C # # Set the min/max values used for color mapping (useful for taking snapshot with coherent color ramp)
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-L Remove duplicated and unreferenced vertices before processing to avoid
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