nxSplash

nxSplash is used along with nxFluids to produce splash effects.

Adjusting the various radius values and handles enables the precise art-direction of splash effects.

From the settings displayed above, nxSplash produces the particle sim, on the left. nxMesher has then been used to give the results shown on the right.

The desired splash can be adjusted by clicking and dragging the yellow handles.

The result significantly alters the resulting simulation.

On the left, there are the default handle settings while, on the right, user-adjusted handles craft the crown shape.

This animation shows the resulting splash simulation from the two settings, with the adjusted handles on the right.

Object Properties

nxSplash Object tab menu settings.

Reset Handles

Resets all Bezier handles to their default positions.

This is useful after experimenting with handle adjustments, to return to the default cone shape.

Bottom Radius

The radius of the bottom circle in the object.

Particles to be included in the splash will be those within the distance given in the Distance parameter from this circle, so the bottom circle should be within the Distance value of the particles or nothing will happen.

The Bottom Radius parameter is demonstrated here, with a value of 25cm on the left, raised to 70cm on the right.

Height

The height of the nxSplash object.

The taller the object, the higher the splash.

In this animation, the Height setting of 50cm, on the left, is contrasted with 100cm, on the right.

Top Radius

The radius of the top circle.

This and the bottom circle radius together determine the angle at which the particles will move from the fluid surface.

On the left, the Top Radius is 50cm. It has been widened to 120cm on the right, with very different results.

Handle Num

The number of handles.

The force to move particles is directed along these handles.

The Handle Num parameter is demonstrated here, with 8 handles on the left, increased to 24 handles on the right.

Strength

The strength of the effect.

Values higher than 100% are possible.

There are contrasting Strength settings in this animation. Strength is set at 60% on the left and then raised to 150% on the right.

Start Time

This is the time at which the splash commences.

You can set this so that the splash starts when an object falls into the fluid, for example.

Duration

The duration of the splash.

The effect is active from Start Time until Start Time + Duration, after which it stops.

Distance

This value determines how far from the bottom circle particles will be included in the splash.

Increasing this value can increase the number of particles in the splash.

Falloff

This is a falloff curve for the splash distance for all particles in the fluid simulation.

If the right-hand point of the spline is greater than zero on the Y-axis, you will start to see effects on particles outside the Distance setting, which would otherwise not be affected.

Strength Falloff

This is a falloff curve for the strength of the effect.

Groups Affected tab

Group

To specify the group, drag and drop the desired Group object into this field.

This setting is useful if you want to ensure that the spawned particles are, or are not, affected by nxSplash.

Fields tab

You can use the Fields options to control where nxSplash operates.