Unity Mass-Spring Cloth Simulation

Option 1. Spring-Mass Cloth simulation

Uploaded on github here: https://github.com/gracefkang/Unity-Mass-Spring-Cloth-Simulation

Desc: Basic mass-spring cloth simulation. You can anchor the cloth to something by giving it the Anchor component. Also added basic collision for spheres.

How to run: Timing parameters are located in Cloth.cs Spring parameters are located in Spring.cs Mass parameters are located in Mass.cs

• Script is located on gameobjects sparseCloth and denseCloth in the Cloth component
• Integrator can be chosen in editor
• press play button to see simulation

Notes:

• Did not implement bending springs because I couldn't figure out how to access the i+2th vertex of each direction in Unity's Mesh data :(

Observations/thoughts:

• increasing the stiffness decreased the stretchiness of the cloth.
• increasing damping lowered the amount of time it took for the sim to come to rest. could be described as the "bounciness" of the cloth.
• the cloth tends to fall in on itself. could be due to lack of bendings springs or lack of handling self-collisions.

Option 3. Experiment with different integrators

See:

• IntegrateEulerExplicit
• IntegrateVerletExplicit
• IntegrateSymplectic

Observations/thoughts:

• Euler tended to "spin out" of control with higher stiffness settings
• Euler also had some jittering around the corners of pinned cloth.
• Verlet had weirder, less realistic, "bouncier" results but was more stable than Euler.
• Symplectic was both stable and more realistic, probably because it was the semi-implicit method out of the 3 options.