SPH - Circle

This emitter is surely the most often used type and suited for many different purposes. It can be scaled and also accept oval shapes, but it is not possible to perform any changes along the height axis – the vertical dimension will always remain 1.0. An arrow indicates the node’s emission direction and helps you to point the emitter to a certain target.

Volume

This feature creates a defined volume of particles. The dimensions of this volume consist of the emitter’s scale settings and the value entered here, based on RealFlow’s grid units. By activating this option, the emitter’s speed value will be set to 0.0 automatically.

Speed

Here you can define the emitter’s initial speed. Higher values will generate more particles per frame. Faster particles act with stronger forces on other particles or objects. The number of emitted particles also depends on your resolution settings. A value of 0.0 disables the emission of particles. This value can be animated either with keyframes or expressions. This value is measured in metres per second [m/s].

V/H random

By default the particles are regularly emitted as a homogeneous stream, showing a kind of pattern.. To avoid and suppress this pattern, it is possible to randomly displace the particles with these functions. The values should range between 0 and 1, but can be higher, as well. “V” stands for vertical, while “H” means horizontal.

Ring ratio

The standard emitter generates particles over the entire area. With “Ring ratio” you are able to define a ring from the particles will be emitted. The value determines the ratio between the inner and outer radius. Small values create a larger area, larger settings are responsible for thin rings.

Side emission

Normally the particles are poured out along the emission axis. With this parameter set to “Yes”, a radial emission is performed from the outline of the emitter and the circle’s inner area remains empty.