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License: MIT License

CMake 1.19% C++ 97.96% Shell 0.11% Python 0.47% C 0.27%

repulsive-curves's Introduction

Repulsive Curves

Christopher Yu, Henrik Schumacher, Keenan Crane ACM Transactions on Graphics 2020 (accepted)

Quick setup instructions

First, clone the project and all its dependencies:

git clone --recursive https://github.com/icethrush/repulsive-curves.git

If the recursive flag was not used to clone, then one can also get the dependencies by running:

git submodule update --init --recursive

From there, the project can be built using CMake.

cd repulsive-curves
mkdir build
cd build
cmake ..
make -j4

We highly recommend using Clang to build the project. Building with GCC/G++ is possible, but will require a different set of warnings to be suppressed.

The code can then be run:

./bin/rcurves_app path/to/scene.txt

For best performance, you should make sure that OpenMP is supported on your system.

Note that the file scene.txt has a particular format that describes where to find the curve data, as well as what constraints will be used. See scenes/FORMATS.md for details.

Using the project

The important options for manipulating curves are all under the "Curve options" panel in the system. These options are:

Run TPE: While checked, the system will run the gradient flow of the tangent-point energy.
Output frames: If checked, screenshots of every frame of the gradient flow will be saved as PNG images in the ./frames directory; note that this is relative to the working directory from which the executable is run.
Normalize view: If checked, the objects will be visually rescaled to fit within the camera frame every timestep. This rescaling is purely visual and does not affect the flow.
Output OBJs: If checked, OBJs of the curve on every frame will be output to the ./objs directory.
Use Sobolev: If checked, our fractional Sobolev preconditioner will be used. If unchecked, the L2 flow is used instead.
Use backprojection: If checked, the system will perform a projection step to enforce hard constraints, correctin for drift. If unchecked, no such step is performed.
Use Barnes-Hut: If checked, hierarchical Barnes-Hut approximation is used for energy and gradient evaluations. If unchecked, the energy and gradient are evaluated exactly (and slowly).
Use multigrid: If checked, multigrid is used to perform linear solves. If unchecked, dense linear solves are performed.

repulsive-curves's People

Contributors

Stargazers

Watchers

repulsive-curves's Issues

Compiling on an M1 Mac

In case others want to build on where I got to:

brew install llvm (because Apple clang does not support -fopenmp)
cmake -DCMAKE_C_COMPILER=/opt/homebrew/opt/llvm/bin/clang ..
recursively replace all -march=native with -mcpu=apple-m1 (apparently clang 15.0 will support -march=native for M1, so if that has been released this step may be redundant)

Where I'm currently stuck is here:

[  2%] Built target stb
[ 15%] Built target glfw
[ 21%] Built target imgui
Consolidate compiler generated dependencies of target polyscope
[ 22%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/gl_utils.cpp.o
/Users/beau/p/repulsive-curves/deps/polyscope/src/gl/gl_utils.cpp:1357:12: error: variable 'targetType' set but not used [-Werror,-Wunused-but-set-variable]
    GLenum targetType;
           ^
/Users/beau/p/repulsive-curves/deps/polyscope/src/gl/gl_utils.cpp:1467:24: error: parameter 'fatal' set but not used [-Werror,-Wunused-but-set-parameter]
void checkGLError(bool fatal) {
                       ^
2 errors generated.
make[2]: *** [deps/polyscope/src/CMakeFiles/polyscope.dir/gl/gl_utils.cpp.o] Error 1
make[1]: *** [deps/polyscope/src/CMakeFiles/polyscope.dir/all] Error 2
make: *** [all] Error 2

I removed -Wunused-but-set-parameter from all of the places it appeared in all files in the tree but I still get that error.

Python implementation

Are there any plans to extend this to a python framework?

Incorrect repository link on project page

The link to the Github repository on the project page at https://www.cs.cmu.edu/~christoy/Projects/RepulsiveSurfaces.html is incorrect. It is:

https://github.com/icethrush/repulsive-surfaces

It should be:

https://github.com/icethrush/repulsive-curves

Replace vector D with scalar D

Currently we express the derivative operator D as

Du := du ° dγ†,

which when discretized (using the edge formulation) gets represented on each edge (i,j) as a 3x2 matrix

(ui - uj)T_ij^T/Lij.

For the systems we need to solve in the curve case, we could instead just let the smooth operator D be defined as just

Du := du,

i.e., the differential of the function u. The corresponding discrete operator would then be a trivial scalar operator

uj - ui

which both yields a matrix of smaller dimensions, and also does not involve the edge lengths (hence never has to be re-built).

Hello,
I have an error trying to cmake the package on WSL, that I believe is different than the other one already posted. Pardon my ignorance in advance, as you can tell by the fact I'm using WSL I'm not very knowledgeable about this stuff.

The red text says: Cmake Error at deps/polyscope/deps/glfw/CMakelists.txt:220
The Xinerama headers were not found.

The cmake error log is below:

Determining if the function sgemm_ exists failed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_f4c41/fast && /usr/bin/gmake -f CMakeFiles/cmTC_f4c41.dir/build.make CMakeFiles/cmTC_f4c41.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_f4c41.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=sgemm_ -o CMakeFiles/cmTC_f4c41.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_f4c41
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_f4c41.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=sgemm_ CMakeFiles/cmTC_f4c41.dir/CheckFunctionExists.c.o -o cmTC_f4c41
/usr/bin/ld: CMakeFiles/cmTC_f4c41.dir/CheckFunctionExists.c.o: in function main': CheckFunctionExists.c:(.text+0x14): undefined reference to sgemm_'
collect2: error: ld returned 1 exit status
gmake[1]: *** [CMakeFiles/cmTC_f4c41.dir/build.make:99: cmTC_f4c41] Error 1
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:127: cmTC_f4c41/fast] Error 2

Determining if the function cheev_ exists failed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_36bd3/fast && /usr/bin/gmake -f CMakeFiles/cmTC_36bd3.dir/build.make CMakeFiles/cmTC_36bd3.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_36bd3.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=cheev_ -o CMakeFiles/cmTC_36bd3.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_36bd3
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_36bd3.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=cheev_ CMakeFiles/cmTC_36bd3.dir/CheckFunctionExists.c.o -o cmTC_36bd3 /usr/lib/x86_64-linux-gnu/libblas.so -lm -ldl
/usr/bin/ld: CMakeFiles/cmTC_36bd3.dir/CheckFunctionExists.c.o: in function main': CheckFunctionExists.c:(.text+0x14): undefined reference to cheev_'
collect2: error: ld returned 1 exit status
gmake[1]: *** [CMakeFiles/cmTC_36bd3.dir/build.make:100: cmTC_36bd3] Error 1
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:127: cmTC_36bd3/fast] Error 2

Determining if the function cheev_ exists failed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_2d9ba/fast && /usr/bin/gmake -f CMakeFiles/cmTC_2d9ba.dir/build.make CMakeFiles/cmTC_2d9ba.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_2d9ba.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=cheev_ -o CMakeFiles/cmTC_2d9ba.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_2d9ba
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_2d9ba.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=cheev_ CMakeFiles/cmTC_2d9ba.dir/CheckFunctionExists.c.o -o cmTC_2d9ba /usr/lib/x86_64-linux-gnu/liblapack.so /usr/lib/x86_64-linux-gnu/libblas.so -fortranlibs
cc: error: unrecognized command-line option ‘-fortranlibs’
gmake[1]: *** [CMakeFiles/cmTC_2d9ba.dir/build.make:101: cmTC_2d9ba] Error 1
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:127: cmTC_2d9ba/fast] Error 2

And the full cmake log:

The system is: Linux - 5.15.90.1-microsoft-standard-WSL2 - x86_64
Compiling the C compiler identification source file "CMakeCCompilerId.c" succeeded.
Compiler: /usr/bin/cc
Build flags:
Id flags:

The output was:
0

Compilation of the C compiler identification source "CMakeCCompilerId.c" produced "a.out"

The C compiler identification is GNU, found in "/home/ak/repulsive-curves/build/CMakeFiles/3.22.1/CompilerIdC/a.out"

Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" succeeded.
Compiler: /usr/bin/c++
Build flags:
Id flags:

The output was:
0

Compilation of the CXX compiler identification source "CMakeCXXCompilerId.cpp" produced "a.out"

The CXX compiler identification is GNU, found in "/home/ak/repulsive-curves/build/CMakeFiles/3.22.1/CompilerIdCXX/a.out"

Detecting C compiler ABI info compiled with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_f8cfc/fast && /usr/bin/gmake -f CMakeFiles/cmTC_f8cfc.dir/build.make CMakeFiles/cmTC_f8cfc.dir/build
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Building C object CMakeFiles/cmTC_f8cfc.dir/CMakeCCompilerABI.c.o
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}

Determining if the function sgemm_ exists passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_61c64/fast && /usr/bin/gmake -f CMakeFiles/cmTC_61c64.dir/build.make CMakeFiles/cmTC_61c64.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_61c64.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=sgemm_ -o CMakeFiles/cmTC_61c64.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_61c64
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_61c64.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=sgemm_ CMakeFiles/cmTC_61c64.dir/CheckFunctionExists.c.o -o cmTC_61c64 /usr/lib/x86_64-linux-gnu/libblas.so
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Determining if the function cheev_ exists passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_ad8c1/fast && /usr/bin/gmake -f CMakeFiles/cmTC_ad8c1.dir/build.make CMakeFiles/cmTC_ad8c1.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_ad8c1.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=cheev_ -o CMakeFiles/cmTC_ad8c1.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_ad8c1
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_ad8c1.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=cheev_ CMakeFiles/cmTC_ad8c1.dir/CheckFunctionExists.c.o -o cmTC_ad8c1 /usr/lib/x86_64-linux-gnu/liblapack.so /usr/lib/x86_64-linux-gnu/libblas.so
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Determining if the function XOpenDisplay exists in the /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_0bc6f/fast && /usr/bin/gmake -f CMakeFiles/cmTC_0bc6f.dir/build.make CMakeFiles/cmTC_0bc6f.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_0bc6f.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=XOpenDisplay -o CMakeFiles/cmTC_0bc6f.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_0bc6f
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_0bc6f.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=XOpenDisplay CMakeFiles/cmTC_0bc6f.dir/CheckFunctionExists.c.o -o cmTC_0bc6f /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libXext.so
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Determining if the function gethostbyname exists passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_a249d/fast && /usr/bin/gmake -f CMakeFiles/cmTC_a249d.dir/build.make CMakeFiles/cmTC_a249d.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_a249d.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=gethostbyname -o CMakeFiles/cmTC_a249d.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_a249d
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_a249d.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=gethostbyname CMakeFiles/cmTC_a249d.dir/CheckFunctionExists.c.o -o cmTC_a249d
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Determining if the function connect exists passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_8001d/fast && /usr/bin/gmake -f CMakeFiles/cmTC_8001d.dir/build.make CMakeFiles/cmTC_8001d.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_8001d.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=connect -o CMakeFiles/cmTC_8001d.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_8001d
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_8001d.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=connect CMakeFiles/cmTC_8001d.dir/CheckFunctionExists.c.o -o cmTC_8001d
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Determining if the function remove exists passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_791c2/fast && /usr/bin/gmake -f CMakeFiles/cmTC_791c2.dir/build.make CMakeFiles/cmTC_791c2.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_791c2.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=remove -o CMakeFiles/cmTC_791c2.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_791c2
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_791c2.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=remove CMakeFiles/cmTC_791c2.dir/CheckFunctionExists.c.o -o cmTC_791c2
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Determining if the function shmat exists passed with the following output:
Change Dir: /home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_a9e4d/fast && /usr/bin/gmake -f CMakeFiles/cmTC_a9e4d.dir/build.make CMakeFiles/cmTC_a9e4d.dir/build
gmake[1]: Entering directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_a9e4d.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=shmat -o CMakeFiles/cmTC_a9e4d.dir/CheckFunctionExists.c.o -c /usr/share/cmake-3.22/Modules/CheckFunctionExists.c
Linking C executable cmTC_a9e4d
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_a9e4d.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=shmat CMakeFiles/cmTC_a9e4d.dir/CheckFunctionExists.c.o -o cmTC_a9e4d
gmake[1]: Leaving directory '/home/ak/repulsive-curves/build/CMakeFiles/CMakeTmp'

Switch to edge-based formulation

Currently we implement everything in a vertex-centric way; to make some of the other enhancements listed here work as described it may be worthwhile to implement everything in an edge-centric way (as described in the paper). This formulation may also have a smaller stencil for certain operations (e.g., computing tangents or taking derivatives).

Compilation Error on WSL

I'm excited to be able to try and use this software - but I am having trouble with the compilation step. Trying to compile on WSL on (Version 4.4.0-18362-Microsoft) and Ubuntu:

NAME="Ubuntu"
VERSION="20.04.1 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.1 LTS"
VERSION_ID="20.04"

After tinkering around for a long time making sure I have sufficient packages install and ready to go, it was making good progress but now gets the series of errors below, which seem to be actual code related? Any help would be appreciated!

Using clang 10.0.0 :

cmake run:

$ cmake -DCMAKE_C_COMPILER=clang ..
-- The C compiler identification is Clang 10.0.0
-- The CXX compiler identification is GNU 9.3.0
-- Check for working C compiler: /usr/bin/clang
-- Check for working C compiler: /usr/bin/clang -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- cmake build type: Release
Using clang/gcc compiler flags
Setting gcc-specific options
-- Building STATIC libraries
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found BLAS: /usr/lib/x86_64-linux-gnu/libblas.so
-- Found AMD library: /usr/lib/x86_64-linux-gnu/libamd.so
-- Found AMD header in: /usr/include/suitesparse
-- Found CAMD library: /usr/lib/x86_64-linux-gnu/libcamd.so
-- Found CAMD header in: /usr/include/suitesparse
-- Found COLAMD library: /usr/lib/x86_64-linux-gnu/libcolamd.so
-- Found COLAMD header in: /usr/include/suitesparse
-- Found CCOLAMD library: /usr/lib/x86_64-linux-gnu/libccolamd.so
-- Found CCOLAMD header in: /usr/include/suitesparse
-- Found CHOLMOD library: /usr/lib/x86_64-linux-gnu/libcholmod.so
-- Found CHOLMOD header in: /usr/include/suitesparse
-- Found SuiteSparseQR library: /usr/lib/x86_64-linux-gnu/libspqr.so
-- Found SuiteSparseQR header in: /usr/include/suitesparse
-- Did not find Intel TBB library, assuming SuiteSparseQR was not compiled with TBB.
-- Found SuiteSparse_config library: /usr/lib/x86_64-linux-gnu/libsuitesparseconfig.so
-- Found SuiteSparse_config header in: /usr/include/suitesparse
-- Adding librt: /usr/lib/x86_64-linux-gnu/librt.so to SuiteSparse_config libraries (required on Linux & Unix [not OSX] if SuiteSparse is compiled with timing).
-- Did not find METIS library (optional SuiteSparse dependency)
-- Found SuiteSparse: TRUE (found version "5.7.1")
-- Found SuiteSparse 5.7.1, building with SuiteSparse.
-- Guesstimated umfpack location as: /usr/lib/x86_64-linux-gnu/libumfpack.so
-- Using X11 for window creation
-- Found X11: /usr/include
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
-- Configuring done
-- Generating done
-- Build files have been written to: /home/bjohnston/git/repulsive-curves/build

Errors

$ make
Scanning dependencies of target stb
[  1%] Building CXX object deps/polyscope/deps/stb/CMakeFiles/stb.dir/stb_impl.cpp.o
[  2%] Linking CXX static library ../../../../lib/libstb.a
[  2%] Built target stb
Scanning dependencies of target glad
[  3%] Building C object deps/polyscope/deps/glad/src/CMakeFiles/glad.dir/glad.c.o
[  4%] Linking C static library ../../../../../lib/libglad.a
[  4%] Built target glad
Scanning dependencies of target glfw
[  5%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/context.c.o
[  6%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/init.c.o
[  6%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/input.c.o
[  7%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/monitor.c.o
[  8%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/vulkan.c.o
[  9%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/window.c.o
[ 10%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/x11_init.c.o
[ 11%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/x11_monitor.c.o
[ 11%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/x11_window.c.o
[ 12%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/xkb_unicode.c.o
[ 13%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/posix_time.c.o
[ 14%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/posix_thread.c.o
[ 15%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/glx_context.c.o
[ 15%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/egl_context.c.o
[ 16%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/osmesa_context.c.o
[ 17%] Building C object deps/polyscope/deps/glfw/src/CMakeFiles/glfw.dir/linux_joystick.c.o
[ 18%] Linking C static library ../../../../../lib/libglfw3.a
[ 18%] Built target glfw
Scanning dependencies of target imgui
[ 19%] Building CXX object deps/polyscope/deps/imgui/CMakeFiles/imgui.dir/imgui/imgui.cpp.o
[ 20%] Building CXX object deps/polyscope/deps/imgui/CMakeFiles/imgui.dir/imgui/imgui_draw.cpp.o
[ 20%] Building CXX object deps/polyscope/deps/imgui/CMakeFiles/imgui.dir/imgui/imgui_widgets.cpp.o
[ 21%] Building CXX object deps/polyscope/deps/imgui/CMakeFiles/imgui.dir/imgui/imgui_demo.cpp.o
[ 22%] Building CXX object deps/polyscope/deps/imgui/CMakeFiles/imgui.dir/imgui/examples/imgui_impl_glfw.cpp.o
[ 23%] Building CXX object deps/polyscope/deps/imgui/CMakeFiles/imgui.dir/imgui/examples/imgui_impl_opengl3.cpp.o
[ 24%] Linking CXX static library ../../../../lib/libimgui.a
[ 24%] Built target imgui
Scanning dependencies of target polyscope
[ 24%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/polyscope.cpp.o
[ 25%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/screenshot.cpp.o
[ 26%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/structure.cpp.o
[ 27%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/utilities.cpp.o
[ 28%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/view.cpp.o
[ 29%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/messages.cpp.o
[ 29%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/pick.cpp.o
[ 30%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/disjoint_sets.cpp.o
[ 31%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/file_helpers.cpp.o
[ 32%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/camera_parameters.cpp.o
[ 33%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/histogram.cpp.o
[ 34%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/gl_utils.cpp.o
[ 34%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/ground_plane.cpp.o
[ 35%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/color_maps.cpp.o
[ 36%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/color_management.cpp.o
[ 37%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/materials/bindata_concrete_seamless.cpp.o
[ 38%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/materials/bindata_mat_wax.cpp.o
[ 38%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/gl/materials/materials.cpp.o
[ 39%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/binary_font_cousine_regular.cpp.o
[ 40%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/trace_vector_field.cpp.o
[ 41%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/ribbon_artist.cpp.o
[ 42%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/point_cloud.cpp.o
[ 43%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/point_cloud_color_quantity.cpp.o
[ 43%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/point_cloud_scalar_quantity.cpp.o
[ 44%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/point_cloud_vector_quantity.cpp.o
[ 45%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_mesh.cpp.o
[ 46%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_mesh_io.cpp.o
[ 47%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_scalar_quantity.cpp.o
[ 47%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_color_quantity.cpp.o
[ 48%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_distance_quantity.cpp.o
[ 49%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_vector_quantity.cpp.o
[ 50%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_count_quantity.cpp.o
[ 51%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_graph_quantity.cpp.o
[ 52%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/surface_parameterization_quantity.cpp.o
[ 52%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/curve_network.cpp.o
[ 53%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/curve_network_scalar_quantity.cpp.o
[ 54%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/curve_network_color_quantity.cpp.o
[ 55%] Building CXX object deps/polyscope/src/CMakeFiles/polyscope.dir/curve_network_vector_quantity.cpp.o
[ 56%] Linking CXX static library ../../../lib/libpolyscope.a
[ 56%] Built target polyscope
Scanning dependencies of target geometry-central
[ 56%] Building CXX object deps/geometry-central/src/CMakeFiles/geometry-central.dir/surface/halfedge_mesh.cpp.o
[ 57%] Building CXX object deps/geometry-central/src/CMakeFiles/geometry-central.dir/surface/halfedge_factories.cpp.o
[ 58%] Building CXX object deps/geometry-central/src/CMakeFiles/geometry-central.dir/surface/meshio.cpp.o
In file included from /home/bjohnston/git/repulsive-curves/deps/geometry-central/src/surface/meshio.cpp:8:
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/../deps/happly/happly.h: In instantiation of ‘std::vector<std::vector<_RealType> > happly::PLYData::getFaceIndices() [with T = long unsigned int]’:
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/surface/meshio.cpp:83:73:   required from here
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/../deps/happly/happly.h:1226:11: error: catching polymorphic type ‘class std::runtime_error’ by value [-Werror=catch-value=]
 1226 |         } catch (std::runtime_error e) {
      |           ^~~~~
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/../deps/happly/happly.h: In instantiation of ‘std::vector<std::vector<_RealType> > happly::Element::getListPropertyAnySign(const string&) [with T = long unsigned int; std::string = std::__cxx11::basic_string<char>]’:
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/../deps/happly/happly.h:1225:59:   required from ‘std::vector<std::vector<_RealType> > happly::PLYData::getFaceIndices() [with T = long unsigned int]’
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/surface/meshio.cpp:83:73:   required from here
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/../deps/happly/happly.h:795:7: error: catching polymorphic type ‘class std::runtime_erro ’ by value [-Werror=catch-value=]
  795 |     } catch (std::runtime_error orig_e) {
      |       ^~~~~
/home/bjohnston/git/repulsive-curves/deps/geometry-central/src/../deps/happly/happly.h:818:9: error: catching polymorphic type ‘class std::runtime_erro ’ by value [-Werror=catch-value=]
  818 |       } catch (std::runtime_error new_e) {
      |         ^~~~~
cc1plus: error: unrecognized command line option ‘-Wno-unused-private-field’ [-Werror]
cc1plus: error: unrecognized command line option ‘-Wno-return-std-move’ [-Werror]
cc1plus: all warnings being treated as errors
make[2]: *** [deps/geometry-central/src/CMakeFiles/geometry-central.dir/build.make:89: deps/geometry-central/src/CMakeFiles/geometry-central.dir/surface/meshio.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:414: deps/geometry-central/src/CMakeFiles/geometry-central.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

Add BVH-refitting

Rather than re-build a BVH every time the geometry changes, we could "re-fit" BVH nodes to account for the new vertex positions. The algorithm is to basically start at the leaves and update the bounding boxes, then percolate these changes up through the parents. Not a bottleneck in the curve case, but could save meaningful time in the surface case.

Use BVH involving positions only

Need to fill in some details here, but basically it seems we should be able to express the differential of the energy in such a way that our Barnes-Hut evaluation no longer requires tangents. This would allow us to use a BVH involving only positions, rather than tangents. Though going from 6D -> 3D is not a big "win" in terms of the Barnes-Hut itself, the thinking is that by having a more efficient BVH we can get a BCT with fewer nodes, and in turn, accelerate the hierarchical matrix-vector product. This then seems like a pretty good candidate for optimization, since the multigrid solves are the biggest bottleneck.

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