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Table Of Contents

158 FORCE FIELDS

DYNAMICS

FORCE FIELDS 159

With a suitable starting velocity

and direction, an object in a

Radial eld will travel in a circle.

You will need to experiment in order to nd a suitable value for v0. If the object is

plunging towards the centre of the eld, you will need to increase v0. If the object

is escaping the eld, you will need to decrease v0.

The Radial eld also offers you an alternative to CINEMA 4D’s native explosions

system. To explode in all directions, placing some fragments inside the eld and set

Strength to a negative value.

Newton

The Newton eld is not a single eld. Rather, a Radial eld will be placed inside each

rigid body and soft body in the solver object. Hence all the bodies will exert a force on

each other. If the Strength value is positive, the bodies will exert a force of attraction.

With a negative Strength value, the bodies will repel each other.

One of the most important factors is the Mass of each body. The greater the body’s

mass, the greater its force of attraction or repulsion.

The distance between the bodies is also a key factor. The force of attraction or repulsion

will weaken with increasing distance.

The formula for the force is:

F = m1 * m2 / (r*r)

i.e. the force is proportional to the mass of the bodies and inversely proportional to

the square of the distance between the bodies. If you were to double a mass, the

force would be doubled. If you were to halve a mass, the force would be halved.