Real-time Skeletonization for Sketch-based Modeling (SMI:2021)

Demo

We provide an executable software under directory "demo_exe/".

Let's create a rigged cat!

1. Split View: 2D View (left window), 3D View (right window)

2. Open Image: Ctrl+O (demo_exe/image/cat.png)

3. Sketch a torso

4. Adjust Contour

5. Parameter in the pop-up window

6. Create a leg in front of the torso

7. Create a symmetric leg behind the torso

8. View symmetric part

9. Create another part: press 'Space' in keybord: switch to 'Sketch Mode', you will see the colorful contour, then sketch, follow step 3-5

10. Create ear

11. Refine the skeleton

12. Finally!

Pick a joint, and hold the left-mouse-button to move. 'Dance! Dance! Dance!', too naive, too simple, the LBS deformation. Have to improve later on...

Tested Environment

1. Ubuntu20.04 LTS, gcc-7 compiler
2. Windows10, Visual Studio Community 2017/2019 x86_amd64 compiler

Prerequisites

Ubuntu20.04 LTS

1. cmake: https://cmake.org/
2. VS Code (Optional but Highly Recommended): https://code.visualstudio.com/docs/cpp/cmake-linux

Windows10

1. Visual Studio 2017/2019
2. git: https://git-scm.com/
3. cmake: https://cmake.org/
4. VS Code (Optional but Highly Recommended): https://code.visualstudio.com/docs/cpp/cmake-linux

Dependencies

Qt, OpenCV, Boost, Libigl(Tetgen, Triangle, CGAL, Eigen) Please install Qt, OpenCV, Boost first, and modify the CMakeLists.txt according to your library's install path.

Ubuntu20.04 LTS

(1) Install Qt 5.12.2

1. Download qt-opensource-linux-x64-5.12.2.run from https://download.qt.io/archive/qt/5.12/5.12.2/, click .run to install

(2) Install OpenCV

sudo apt-get install libopencv-dev

(3) Install Boost

sudo apt-get install libboost-all-dev

Windows10

(1) Install Qt 5.12.2

1. Download qt-opensource-windows-x86-5.12.2.exe from https://download.qt.io/archive/qt/5.12/5.12.2/, click .exe to install, then select MSVC 2017 64-bit

(2) Install OpenCV

1. Download OpenCV source code from https://github.com/opencv/opencv/archive/4.2.0.zip
2. CMake Configure:

3. Build and Install: 1. open OpenCV.sln under build directory with VS2017/VS2019. 2. Select build type as Release and Build solution. 3. goto CMakeTargets/INSTALL and Build

(3) Install Boost

https://sourceforge.net/projects/boost/files/boost-binaries/1.74.0/, select suitable versions to download (boost_1_74_0-msvc-14.2-64.exe for VS2019, boost_1_74_0-msvc-14.1-64.exe for VS2017), click .exe to install

Compile & Run

For Linux Users, type in the following commands:

mkdir build
cd build
cmake ..
make -j8
./main

For Windows Users

It's highly recommended using VS Code and cmake tools from 'VS code' market place to compile the source code.

1. Select the build type as Realse
2. Select a compiler: Ctrl+Shift+P, type in CMake: Select a Kit, select a compiler (eg. Visual Studio Community 2017 x86_amd64 or Visual Studio Community 2019 x86_amd64)
3. CMake Configuration: Ctrl+Shift+P, type in CMake Configure. The configuration process will automatically download all dependencies of libigl. Wait until CMake Configuration successfully finishes.

4. Build the solution: you will find RealSkel.sln under directory build/， open .sln with Visual Studio 2017/2019, switch to Release Mode, and Build Solution.

5. Run the program: copy all *.dll and directory platforms/ from demo_exe to your build/Release/ directory. Click main.exe, then you can run the program.

Other Issues

Adapt to CGAL

goto external\libigl\external\cgal\Surface_mesh\include\CGAL\Surface_mesh\Surface_mesh.h, add the following code in Class SM_Index

size_type idx()const{return idx_;}

You should get something like this

class SM_Index
{
// ... 
    size_type idx()const{return idx_;}
// ...
};

The lazy way

You can also replace the file `external\libigl\external\cgal\Surface_mesh\include\CGAL\Surface_mesh\Surface_mesh.h' with Surface_mesh.h .