Daemons - Gravity
“Gravity” is a global daemon acting with equal strength at any point of the 3D domain.
Affect
There are two options:
- "Force" accelerates the particles and they become faster and faster as long as the force is acting on them.
- “Velocity” only works with particles and adds the daemon's "Strength" value to a particle's speed. The resulting peak velocity remains constant during the simulation.
An example: Let's assume the daemon's "Strength" is 9.8 and the emitter's "Speed" value is 2.0. Here, a particle's velocity will be roughly 11.8 m/s.
Strength
This is the dimension of the gravitational acceleration and it depends on your current location. “Strength" accepts both positive and negative values. The "Strength" parameter is also known as “g”. Here are some value for the most important celestial bodies:
Celestial body | g [ m/s^2 ] | Celestial body | g [ m/s^2 ] |
|---|---|---|---|
Sun | 274.0 | Jupiter | 24.9 |
Mercure | 3.70 | Saturn | 11.1 |
Venus | 8.87 | Uranus | 9.0 |
Earth | 9.81 | Neptune | 11.4 |
Moon | 1.62 | Pluto | 0.17 |
Mars | 3.37 | Ceres | 0.27 |
Underwater
This parameter is only available with the “Push” method from the “Bounded” parameter, and exclusively acts on objects in combination with a RealWave surface. The force is only applied when the point of action is below the surface. For example, you want to simulate a ship pushed by its propeller, but you do not want it to move when the propeller is above the surface.