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135 lines
5.1 KiB
Markdown
135 lines
5.1 KiB
Markdown
# QuadriFlow: A Scalable and Robust Method for Quadrangulation
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Source code for the paper:
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Jingwei Huang, Yichao Zhou, Matthias Niessner, Jonathan Shewchuk and Leonidas Guibas. [**QuadriFlow: A Scalable and Robust Method for Quadrangulation**](http://stanford.edu/~jingweih/papers/quadriflow/quadriflow.pdf), The Eurographics Symposium on Geometry Processing (SGP) 2018.
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<!-- ## Processing Result -->
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## WebGL Application
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Our 3D WebGL Apps for QuadriFlow are online! Without any installation, you are able to
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* [**Compare**](https://yichaozhou.com/publication/1805quadriflow/#demo) QuadriFlow with previous methods;
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* [**Quadrangulate**](https://yichaozhou.com/publication/1805quadriflow/#tool) your own meshes and
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download the result!
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## Desktop Software
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The software supports cmake build for Linux/Mac/Windows systems. For linux and mac users, run **`sh demo.sh`** to build and try the QuadriFlow example, which converts `examples/Gargoyle_input.obj` to `examples/Gargoyle_quadriflow.obj`.
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### Install
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```
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git clone git://github.com/hjwdzh/quadriflow
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cd quadriflow
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mkdir build
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cd build
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cmake .. -DCMAKE_BUILD_TYPE=release
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make -j
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```
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### QuadriFlow Software
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We take a manifold triangle mesh `input.obj` and generate a manifold quad mesh `output.obj`. The face number increases linearly with the resolution controled by the user.
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```
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./quadriflow -i input.obj -o output.obj -f [resolution]
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```
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Here, the resolution is the desired number of faces in the quad mesh.
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## Advanced Functions
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### Min-cost Flow
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By default, `quadriflow` uses the Boykov maximum flow solver from boost becuase it is faster. To
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enable the adaptive network simplex minimum-cost flow solver, you can enable the `-mcf` option:
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```
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./quadriflow -mcf -i input.obj -o output.obj -f [resolution]
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```
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### Sharp Preserving
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By default, `quadriflow` does not explicitly detect and perserve the sharp edges in the model. To
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enable this feature, uses
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```
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./quadriflow -sharp -i input.obj -o output.obj -f [resolution]
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```
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### SAT Flip Removal (Unix Only)
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By default, `quadriflow` does not use the SAT solver to remove the flips in the integer offsets
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map. To remove the flips and guarantee a watertight result mesh, you can enable the SAT solver.
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First, make sure that `minisat` and `timeout` is properly installed under your `${PATH}`. The
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former can be done by building `3rd/MapleCOMSPS_LRB/CMakeLists.txt` and copying `minisat` to `/usr/bin`.
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In addition, `timeout` is included in coreutils. If you are using Mac, you can install it using
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homebrew:
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```
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brew install coreutils
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export PATH="/usr/local/opt/coreutils/libexec/gnubin:$PATH"
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```
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You can verify if those binaries are properly installed by executing
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```
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which minisat
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which timeout
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```
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After that, you can enable SAT flip removal procedure by executing
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```
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./quadriflow -sat -i input.obj -o output.obj -f [resolution]
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```
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When using the SAT flip removal, we also suggest you enabling the verbose logging to understand
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what is going on. You can build quadriflow with the following options:
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```
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cmake .. -DCMAKE_BUILD_TYPE=release -DBUILD_LOG=ON
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```
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### GUROBI Support (For Benchmark Purpose)
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To use the Gurobi integer programming to solve the integer offset problem, you can build QuadriFlow with
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```
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cmake .. -DCMAKE_BUILD_TYPE=release -DBUILD_GUROBI=ON -DBUILD_LOG=ON
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```
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This override other solvers and should only be used for benchmark purpose.
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## External Dependencies
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* Boost
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* Eigen
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* OpenMP (optional in CMake)
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* TBB (optional in CMake)
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* GUROBI (for benchmark purpose only)
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## Licenses
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QuadriFlow is released under [MIT License](LICENSE.txt).
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For 3rd dependencies,
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* Boost and Lemon are released under [Boost Software License](https://lemon.cs.elte.hu/trac/lemon/wiki/License)
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* Most part of Eigen is released under [MPL2](https://www.mozilla.org/en-US/MPL/2.0/FAQ/)
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* Sparse Cholesky Decomposition algorithms are released under LGPL
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* To replace it using Sparse LU decomposition with a more permissive MPL2 license (a little slower), enable `BUILD_FREE_LICENSE` in CMake (e.g., `-DBUILD_FREE_LICENSE=ON`).
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* `pcg32.h` is released under the Apache License, Version 2.0
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* `parallel_stable_sort.h` is released under the MIT License
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## Authors
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- [Jingwei Huang](mailto:jingweih@stanford.edu)
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- [Yichao Zhou](mailto:zyc@berkeley.edu)
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© 2018 Jingwei Huang and Yichao Zhou All Rights Reserved
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**IMPORTANT**: If you use this software please cite the following in any resulting publication:
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```
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@article {10.1111:cgf.13498,
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journal = {Computer Graphics Forum},
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title = {{QuadriFlow: A Scalable and Robust Method for Quadrangulation}},
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author = {Huang, Jingwei and Zhou, Yichao and Niessner, Matthias and Shewchuk, Jonathan Richard and Guibas, Leonidas J.},
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year = {2018},
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publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
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ISSN = {1467-8659},
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DOI = {10.1111/cgf.13498}
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}
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```
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## Triangle Manifold
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In case you are dealing with a triangle mesh that is not a manifold, we implemented the software that converts any triangle mesh to watertight manifold. Please visit https://github.com/hjwdzh/Manifold for details.
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