mParticles World Operator

The mParticles World operator associates the particles in the current event or system to a specific simulation world, in the form of an mParticles World Helper (driver) in the scene. After you make the connection, that helper's settings affect all particles in the event.

• Particle View > Add or select mP World.

You can place the mParticles World operator in local and global events. The presence of the operator in an event means that the particles in the event participate in a physics simulation. If the operator is in a global event, all particles in the Particle Flow system always participate in the simulation.

Particles in an event can belong to only one simulation world, specified by the mParticles World operator in the event. While it is possible to add multiple mParticles World operators to an event, this creates ambiguity, and, as a result, Particle Flow disregards all of them.

The presence of an mParticles World operator in an event (with an associated mParticles World driver) is not enough to start a simulation. A second necessary component is the mParticles Shape operator, which defines the particles' simulation properties. Always place the mParticles Shape operator before the mParticles World operator in an event, so the mParticles World operator knows the particle properties, defined by mParticles Shape, for simulation.

Note: Particles from different Particle Flow systems (with different global PF Source events) cannot participate in the same simulation world. This is due to the fact that particles are tracked by their IDs in a simulation world, and each PF Source creates its own set of IDs. Even if mParticles World operators in two different Particle Flow system are associated with the same mParticles World driver, in effect two simulation worlds are created (one for each Particle Flow system), but both simulations have the same global properties as defined by mParticles World driver.

Interface

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To specify the mParticles World helper that influences particles in the current event, click this button and then select the helper.

=>

Opens the parameters of the associated mParticles World driver in the standard command panel.

Create New Driver

Automatically creates a new mParticles World helper object in the scene and associates the mParticles World operator with this helper.

Suppress Express Save

Particle Flow has an integrated Express Save functionality that allows fast save when the current frame is not 0. However, this feature can interfere with the integrity of the MassFX simulation. Therefore, if you have a complex MassFX setup, with the simulation starting at or before frame 0, it's recommended that you enable Suppress Express Save (it's on by default). That way the integrated Express Save functionality is disabled in the events that have an mParticles World operator.