PARTICLE PLAYGROUND HAVE TWO WALLS SIMULATOR

The simulation's accuracy is indicated by a consistent total energy with little variation over time.

9.8 m/s 2), and make relatively large frame rate and compute cycle entries. To test the simulator's accuracy, enter a restitution value of 1, normal Earth gravity (i.e. So the most accurate simulation is produced by choosing a high frame rate as well as a high compute-cycles entry. To maintain realism, the differential solver's time slice (delta-t) is equal to 1/(framerate * computecycles), and the smaller the delta-t value, the more accurate the result.

PARTICLE PLAYGROUND HAVE TWO WALLS SIMULATOR

The simulator's accuracy improves with smaller delta-t values, so to improve the model's accuracy while keeping the display synchronized with wall time, the simulator repeats the differential solution 'Compute cycles' times between outcomes that are displayed. The simulator numerically solves a differential equation by iteratively processing the usual suspects (position, velocity and acceleration) for a slice of simulator time called 'delta-t'. The 'Compute Cycles' entry is a bit more difficult to describe. This control's effectiveness relies on the computer's speed, but with a fast machine, frame rates above 120 FPS are possible. The 'Frame Rate FPS' entry adjusts the display frame rate. The zero-G case simulates being in orbit or far away in space with no gravitational forces. The 'G Acceleration' entry can be adjusted to have Earth surface acceleration (9.8 m/s 2) or any other value including zero. More detail at this link: Wikipedia: Coefficient of Restitution Each of these dimensions has an independent energy. Remember that there are three dimensions and three particle energies - X (left/right), Y (up/down) and Z (toward/away). An entry of 0 causes the particle's energy to be entirely lost in the dimension perpendicular to the wall's orientation. An entry of 1 makes the container perfectly elastic, meaning no particle energy is lost during a bounce. When the simulator is restarted, a given particle's velocity is randomly generated to lie between +n and -n using this entry's value, in each of the X, Y and Z dimensions.Īs explained above, the 'Energy Restitution' entry adjusts the elasticity of the container's walls. The 'Maximum Velocity' entry chooses the highest velocity randomly assigned to each particle. The 'Particle Radius' entry chooses the particle size, from tiny to beach-ball size. Larger numbers won't hurt your computer (but maybe your eyes). More than about 50 makes it difficult to figure out what's going on.

The 'Particle Count' entry selects the number of simulated particles. The container's properties may be adjusted - its walls may be perfectly elastic, losing no energy, or they may lose a specified amount of energy on each bounce, using the 'Energy Restitution' entry. This is an experimental computer graphics application that allows you to explore the behavior of particles in a container.

Particle playground have two walls