The position and direction of the gravity is controlled using the object’s axis system. Drag the name of the object that will represent the gravity’s position and direction from the Object Manager and drop it into this box.
Two types of force field are available: Planar (2D) and Spherical (3D
With Type set to Planar, the force will be applied perpendicularly to the object’s XY plane (i.e. along its Z axis). An arrowhead appears in the viewport to indicate the direction of the force. You can adjust the size of the arrowhead using the Icon Size setting on the Attribute Manager’s Node Properties tab.
If Type is set to Spherical, the force will be applied spherically towards the object’s origin. This mode is especially useful for gathering particles together. The Spherical gravity force is shown in the viewport as a sphere, the size of which you can adjust using the Icon Size setting on the Attribute Manager’s Node page.
This is the strength of the gravity force. The higher this value, the stronger the force of gravity exerted on the particles. Not only will the particles change their direction of movement, they will also accelerate. You can enter negative values, in which case particles will be pushed away from the object’s origin.
Controls the decay of the gravity force with increasing distance from the object’s origin. A value of 0 disables the decay, causing the gravity to affect all particles no matter how far away. Higher values scale the influence exponentially. The further away a particle is from the object’s origin, the weaker the force will be that is exerted on it. The higher the Decay value, the smaller the area around the object will be where the force will noticeably affect the particles.
Gravitational dependency (in %) in correlation to a particle’s mass. The greater the mass the more it will be affected by Gravity.
Gravitational dependency (in %) in correlation to the size of the particles. The larger the particle, the more it will be affected.
Additional input ports:
A Boole value of True switches the node on; a value of False switches it off.
Since the node’s parameters can be keyframe animated, by default the Cinema 4D time is used internally to ensure the values are interpolated correctly. However, you can pass your own time value to this port. This should be of the data type Time, which is a Real number in the simplest case. If no value is passed, Cinema 4D’s time is used.
Connect this port to the stream of particles that should be affected by the gravity force, such as to the Particle output port of a PPass node.