The Mass operator allows you to control the mass of particles. The mass value of a particle will affect the way it behaves within the bind solver, as well as the PhysX solver.
Enable mass override: when enabled, mass values of particles will be affected.
Value: the initial absolute mass value assigned to particles.
Clamp min: the minimum allowable mass value.
Clamp max: the maximum allowable mass value.
Relative to property: controls whether assigned mass values will be relative to a particle property.
Property: the property type which the mass value will be relative to.
*Threshold: the target threshold that particle property will be compared to, when assigning mass values.
Exponent: the exponent that particle property ratios will be raised to. Larger exponent values will increase the mass disparity between large and small property values.
Invert: controls whether the resulting property ratio will be inverted.
When “relative to property” is on, the following equation is used to calculate particle masses:
mass = pow(property value/(threshold), exponent)
Relative to bindings: controls whether masses will be affected by their distance to deactivated/kinematic particles in their binding network.
Particle bindings: regular particle bindings will be considered in the breadth-first traversal of the binding network.
PhysX bindings: PhysX bindings will be considered in the breadth-first traversal of the binding network.
Multiplier: the multiplier applied to masses, relative to their depth in the breadth-first search.
Exponent: the exponent applied to the depth-relative multiplier. The larger the exponent, the greater affect the multiplier will have on particles relative to their depth in the breadth-first search.
Inertia is the tendency for an object to resist changes to its linear/angular velocity. Increasing the inertia multiplier of a particle can make it feel denser/heavier. Whereas particle mass affects how a particle interacts with other particles, inertia affects how a particle reacts to all external forces/changes.
Enable inertia multiplier override: when enabled, PhysX particle inertia multipliers will be affected.
Value: the inertia multiplier to apply to the particle.
Individual particle inertia multipliers are combined (multiplicatively) with the overall inertia multiplier specified in the global PhysX settings of the tyFlow object.
Clamp min: the minimum allowable inertia multiplier value.
Clamp max: the maximum allowable inertia multiplier value.
Relative to property: controls whether assigned inertia multiplier values will be relative to a particle property.
Property: the property type which the inertia multiplier value will be relative to.
*Threshold: the target threshold that particle property will be compared to, when assigning inertia multiplier values.
Exponent: the exponent that particle property ratios will be raised to. Larger exponent values will increase the inertia multiplier disparity between large and small property values.
Invert: controls whether the resulting property ratio will be inverted.
Allows you to modify the location of a particle’s PhysX center of mass.
Offset (local): moves the particle’s center of mass in the local space of its transform.
Offset (world): moves the particle’s center of mass in world space.
On shape bounds (local): moves the particle’s center of mass to a specified location on its local bounding box.
On shape bounds (world): moves the particle’s center of mass to a specified location on its axis-aligned bounding box.
Particle position: moves the particle’s center of mass to its location in world space.
Shape center: moves the particle’s center of mass to the center of its shape mesh.