nxInfectio simulates growth patterns.

It is modeled on the idea of an infection spreading from one particle to another, but you can use it for any kind of growth.

Object tab

nxInfectio Object tab.

Add Seed Object

Click this button to create a new Seed Object and add it to the scene as a child object of the Infectio modifier.

Note: Without at least one seed object, the modifier will not work and all the parameters will be disabled until a seed object is added.

nxInfectio Demo UI Update_v02.mp4

In this animation, nxInfectio starts operating from the two Seed Objects, which have been added to the scene (see parameter description on this page) and continues its life cycle, determined by the settings chosen.

Color Mode

Set as Fixed Value, by default, this drop-down menu controls what will happen to the particle color when it changes from the uninfected to incubating and from incubating to infected.

The other options are: Gradient, Use Groups and No Color Change.

Fixed Value

In this mode, the particle colors will change to the colors shown in the Incubating (if the particle is now in the incubating state) and Infected color fields (if the particle is now in the infected state).

With the Color Mode as Fixed Value, the Incubating and Infected particles can be colored using their individual parameters.

Gradient

With this option, infected particles will use the color from the right of the Incubation Gradient parameter. Particles which have just changed from uninfected to incubating will use the color from the left of the gradient.

Particles which are in the process of incubating will use a color from somewhere along the gradient, depending on how close they are to becoming infected.

Here, the Color Mode is Gradient, with the infected particles taking their color from the Incubation Gradient setting.

Use Groups

If you use this option, instead of colors, the particles will change particle group when changing from uninfected to incubating and again when changing state from incubating to infected.

With this option, the interface will change slightly, giving additional parameter settings.

Drag the groups to use into the two fields or use the Add Group buttons to create new groups.

Note: You must supply both groups; if either is missing, the colors used in the Fixed Value mode will be used instead.

Color Mode is set as Use Groups, in this image. The different particle groups are set in the Incubating Group and Infected Group fields.

No Color Change

The color will not change.

Note: The Infected Lifespan has been changed to 1f here.

Therefore particles die when infected, despite not changing color.

With Color Mode set as No Color Change, particles do not change color.

Incubating

The color to use for particles in the incubating phase when Color Mode is set to Fixed Value.

Here, the Incubating particles are colored black.

Infected

The color to use for particles in the infected phase when Color Mode is set to Fixed Value.