Fluid Emission Speed Attributes

Since Maya Fluid Effects are solved as incompressible fluids, emitting speed into a fluid container can not have the same effect as emitting speed with particles. For fluids, any speed emitted into a fluid that creates motion away from or towards a point would fight the incompressibility of the fluid. Therefore, this type of behavior is not supported by fluid emission speed.

Speed Method

Determines how velocity emission values are set in the fluid.

Add

Adds emitted velocity into the fluid as a rate each simulated step for the duration of the simulation. The amount of velocity emitted into the fluid is determined by the emitter Rate (Percent) value. See Rate (Percent).

By default, Speed Method is set to Add.

Replace

Replaces the amount of velocity in the fluid each simulated step.

No Emission

The fluid emitter does not modify the velocity of the fluid.

Inherit Velocity

Sets the amount of velocity that is inherited by the fluid from the translation velocity generated by an animated emitter. Inherited Velocity is added to the Rate (Percent) value to generate an overall emission velocity.

Inherit Velocity is calculated only when an animated emitter is present, which generates the translational velocity, or when nParticle velocity is present, such as when an nParticle object is emitting fluid.

Normal Speed

Sets the emission speed along the normals of a surface when a fluid is emitted from a surface. Normal Speed applies only when the Emitter Type is set to Surface. See Emitter Type.

Tangent Speed

Sets the emission speed along the tangents of a curve when a fluid is emitted from a curve. Tangent Speed applies only when the Emitter Type is set to Curve. See Emitter Type.

Along Axis

Sets the emission speed along the central axis of all volume emitters. The central axis is defined as positive-Y for cube and sphere volumes. Along Axis applies only when the Emitter Type is set to Volume. See Emitter Type.

Around Axis

Sets the speed around the central axis of all volume emitters. Around Axis applies only when the Emitter Type is set to Volume. See Emitter Type.

Directional Speed

Adds velocity in the direction specified by the Direction X,Y, and Z attributes. Directional Speed is applicable to all emitter types.

Direction X, Y, Z

Sets the emission speed direction relative to the emitter’s position and orientation.