Forces affect mainly particle systems. Some can affect geometry as well.
Push applies a uniform, unidirectional force to particle systems.
The Motor space warp works like Push, but applies rotational torque to the affected particles or objects rather than a directional force. Both the position and orientation of the Motor icon affect particles, which swirl around the Motor icon.
The Vortex space warp applies a force to particle systems, spinning them through a whirling vortex, and then moving them down a long, thin spout or vortex well. Vortex is useful for creating black holes, whirlpools, tornadoes, and other funnel-like objects.
The Drag space warp is a particle motion damper that reduces particle velocity by a specified amount within a specified range. The damping can be applied linearly, spherically, or cylindrically. Drag is useful for simulating wind resistance, transfers into dense media (like water), impacts with force fields, and other, similar situations.
The PBomb space warp creates an impulse wave to blow up a particle system, as distinguished from the Bomb space warp, which blows up geometry. The PBomb is particularly well suited to the Particle Array (PArray) system with Particle Types set to Object Fragments.
The Path Follow space warp forces particles to follow a spline path.
The Gravity space warp simulates the effect of natural gravity on particles generated by a particle system. Gravity is directional. Particles moving in the direction of the gravity arrow accelerate. Particles moving against the arrow decelerate.
The Wind space warp simulates the effect of wind blowing particles generated by a particle system. Wind is directional. Particles moving in the direction of the wind arrow accelerate. Particles moving against the arrow decelerate. In the case of spherical wind, motion is toward or away from the icon.
The Displace space warp acts as a force field to push and reshape an object's geometry. Displace affects both geometry (deformable objects) and particle systems.
