Soft Body Simulation (slimeEngine)

How to Compile and Run

On UNIX systems

mkdir build
cd build
cmake ../
make

On Windows (Win32):

• Use Visual Studio to open the project solution and build.

How to Use the Executable

On UNIX systems From root folder,

cd build
./slimeEngine

On Windows (Win32) After building, run:

slimeEngine\build\Debug\slimeEngine.exe

Selecting the Model

Available objects:

0 - pudding
1 - sphere
2 - bunny
3 - tetrahedron
4 - cube

By default, the model is pudding (index 0).
To select another model, pass its index as an argument:

.\slimeEngine.exe 1

(Loads the sphere.) Or on UNIX:

./slimeEngine 1

User Interface and Controls

Camera Controls

• Mouse Movement
  • Press L: Lock the mouse to control camera yaw and pitch (first-person view).
  • Press K: Unlock the mouse for normal cursor movement (adjust parameters in ImGui).
• W / A / S / D keys — Move camera forward, left, backward, and right.

Object Interaction

• Aim at the soft body and press G to grab and drag a vertex.
• Press R to release the selected vertex.
• Selection uses ray tracing from the center of the screen to hit soft body triangles.

ImGui Control Panel

A real-time panel (built with ImGui) allows live tuning:

• Edge Compliance — Softness of edges: 0.01f to 0.2f
• Volume Compliance — Resistance to volume change: 0.01f to 0.2f
• Substeps — Number of times the constraints are solved: 1 to 50
• Reset Button — Resets the model (drops it from a height of 5.0f).
• Lift Button — Moves the entire soft body upwards while holding the button

Problems We Encountered

• Intel graphics drivers may not fully support OpenGL 3.3, leading to compatibility issues.