The wind effect can take the mass and size of particles into account, enabling small, light objects to be easily lifted by the wind while heavier objects are harder to shift.
The position and direction of the wind is controlled using the axis system of an object. Drag & drop the name of this object into this box.
Two types of wind 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 this 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 away from the object’s origin. The Spherical wind 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 Properties page.
This is the strength of the wind force. The higher this value, the stronger the force exerted on the particles. Not only will the particles change their direction of movement, they will also accelerate. You can, if you wish, enter negative values, in which case particles will be blown in the opposite direction.
Controls the decay of the force with increasing distance from the object’s origin. A value of 0 disables the decay, causing the wind to affect all particles no matter how far away. Higher values scale the influence exponentially. The more distant a particle is from the object’s origin, the weaker the force exerted on it. The higher the Decay value, the smaller the area around the object where the wind will noticeably affect the particles.
These values takes the mass and size of the particles into account. The greater the mass and the larger the particle, the less effect the wind force has on that particle.
To add turbulence to the wind, set Turbulence to a value greater than 0. The higher the value, the more the turbulence affects the particles. This effect is independent of the Strength value and affects particles even if Strength is set to 0. Frequency defines the speed of the change caused by the turbulence. The higher the value, the more frequent the changes in the force exerted on the particles.
Turbulence can be thought of as a three-dimensional type of noise. The lower this value, the smaller the scale of the changes that will be made. It may help you to think of the turbulence as a propeller, the size of which is defined by the Structure Size value.
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 that 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 wind force, such as to the Particle output port of a PPass node.