9.0

158 FORCE FIELDS
DYNAMICS
DYNAMICS
FORCE FIELDS 159
When an object is between the Inner Distance and Outer Distance, the strength of
the force exerted on the object will falloff according to the function dened under
Falloff. When an object is outside the Outer Distance, the eld will exert no force
on the object.
You can dene the Outer Distance to be larger than the eld itself. However, an object
will experience a force only when it is inside the eld’s shape.
Field Tab
Using the Field tab you can
dene the type, strength and
direction of the gravity eld.
Mode
Use Field to set the type of gravity eld required. Three types are available: Axial,
Radial and Newton.
Axial Radial Newton
Axial
The lines of force in the Axial eld run parallel to each other. Hence an object that is inside
the Axial eld will be accelerated in one direction only, as specied under Direction.
Radial
The Radial gravity eld will attract objects towards its centre if a positive Strength
value is used. With a negative Strength value, the eld will repel objects away from
its centre.
The Radial eld can also be used to create circular motion. The object will need a
starting velocity (v0) and it should be placed at the top of the eld with its movement
at a right angle to the line of force.