A Python implementation of the "Projective Dynamics: Fusing Constraint Projections for Fast Simulation" paper by Sofien Bouaziz, Sebastian Martin, Tiantian Liu, Ladislav Kavan, Mark Pauly
Python 3, NumPy, PyGlet, PIL
python3 renderer.py [size] [flag_types]
size is an integer for the size of the flag (i.e. 20 will give a 20 by 20 vert flag). flag_types is a space separated argument where each one is either spring, exp_tri, or imp_tri, depending on the type of flags desired (Explicit Spring based, Explicit Triangle elements, or Implicit Triangle Elements).
w and s control the zoom. r, t control the wind magnitude, which is printed to console. y flips the wind magnitude. Mouse controls the rotation around the Y-axis. f toggles the triangle borders. esc exits the program.