Interception of particles
This project was taking too long. It could be a good term project.
Good points:
Scollbar puts particle in right place.
Diameter works well.
Small particles have much more Brownian motion.
Bad features:
Streamlines are terrible.
Particle intercepts too deep on obstacle.
Not even started on differences between streamline and particle trajectory.
If students want this for a term project but cannot program in Java, I will help them if they develop the algorithm for drawing nice streamlines.