Qtaichi: Turn Drawing to Animation

Qtaichi is a real-time simulator turning user drawing inputs to physics-based animations with Moving Least Squares Material Point Method based on taichi.h developed by Yuanming Hu.

"Qtaichi" is the combination of "Qt & taichi".

Written in C++ by Zhehao Li as a homework on the computer graphics course taught by Prof. Ligang Liu at USTC.

Introduction Article (In Chinese) 中文介绍

Taichi编程语言初探：太极之趣——自由绘制的2D冰雪仿真世界

Dependencies

• Qt5 libs (Qt5Core, Qt5GUI, Qt5Widgets)

How to install

• Method 1(Recommand on Winx64)：

  Directly run ./Qtaichi_installer/Release/setup.exe.

  If Chinese users meet problems with pulling this repo from github , you can try gitee：https://gitee.com/zhehaoli/Qtaichi

• Method 2(Compile from source)：

  Use CMake to configure, generate, then open the project and finally build it. (Here I have used UCMake From @Ubpa, which is a extended wrapper of CMake.) You can also try directly using CMake by rewriting CMakeLists.txt.

How to play

You can use the toolbar on GUI to:

• Draw basic geometries, like free curve, ecllipse, polygons.
• Select physical properties like fluid, solid, snow and jelly
• Draw "velocity line" to give objects initial velocities
• Start, pause or reset animation

Demos

1. Qtaichi

Shown in the teaser.

Drawing	Particle	Animation

2. Shoot a bullet towards snowman

Drawing	Particle	Animation

3. Water Spike

Drawing	Particle	Animation

4. Jelly Spike

Drawing	Particle	Animation

​

5. Snowball fight

Drawing	Particle	Animation

6. We also try to reproduce one result in SIGGRAPH13 MPM paper:

SIGGRAPH13 MPM	Our Corresponding Results

7. Other user drawings

Update

• 5/11/2020: Support saving scene to image

Future work

1. Add rigid body support
2. Rewrite Qtaichi with taichi.py!