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This field becomes active when “Condition” is set to “Expression”. RealFlow|Cinema 4D constantly checks against the given expression during a simulation and decides whether the condition is fulfilled or not. There is a long list of keywords that can be used to create a certain condition:

→ add table from http://support.nextlimit.com/display/rf2015docs/Daemons+-+Filter and check if all attributes are valid

An example:

 

Attribute

Expression keyword

Age

particle.age, particle.isolation

Collision

particle.collision

Density

particle.density

Force

particle.force.mod, particle.force.x, particle.force.y, particle.force.z, particle.f.mod, particle.f.x, particle.f.y, particle.f.z

ID

particle.id

Position

particle.pos.x, particle.vel.y, particle.vel.z, particle.position.x, particle.position.y, particle.position.z

Velocity

particle.speed, particle.velocity.x, particle.velocity.y, particle.velocity.z, particle.vel.x, particle.vel.y, particle.vel.z

 

An example: Let's assume you want to filter the particles from “Fluid.1” against the particles' velocities:

If a particle' speed is lower than 2.0 the particle should be attached to “Fluid.2”:

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