"Linear" is a two-dimensional emitter in the shape of a straight line. Emitters define the point of particle creation in 3D space, while the particles are part of the "Fluid" container. Emitters can be scaled, rotated, and translated like objects; an arrow indicates the direction of emission.
Emitter Type
Toggle the emitter's type with this drop-down menu. The following parameters and the viewport representation will be updated according to your selection. Bear in mind that type changes will change the emitter's and fluid's behaviour completely.
Height
This creates a rectangular, curtain-like array filled with particles. The parameter is connected to Cinema 4D's scale settings.
Length
The length of the emitter is adjusted here. The parameter is connected to Cinema 4D's scale settings.
Vertical Random
To avoid regular emission, it is possible to randomly displace the particles with these functions. The value's range is between 0 and 1.
Horizontal Random
To avoid regular emission, it is possible to randomly displace the particles with these functions. The value's range is between 0 and 1.
Speed
Here the particles' initial speed is defined in metres per second. Higher values will generate more particles per frame. The number of emitted particles also depends on the fluid's → “Resolution” settings. A value of 0.0 stops the emission of particles. The parameter is connected to Cinema 4D's scale settings.