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You can enter any valid expression here that serves as a given condition. This tool is surely the most complex filter, but also offers a wide variety of possibilities. “@ Expression” offers a long list of available keywords. These are used to address certain features of a particle. RealFlow constantly checks against these attributes during a simulation and decides whether the condition is fulfilled or not. This is a very effective and fast way to create flexible conditions and is suited to many applications.
Attribute | Expression keyword |
|---|---|
Velocity | particle.speed, particle.velocity.x, particle.velocity.y, particle.velocity.z, particle.vel.x, particle.vel.y, particle.vel.z |
Position | particle.pos.x, particle.vel.y, particle.vel.z, particle.position.x, particle.position.y, particle.position.z |
Vorticity | particle.vorticity.mod, particle.vorticity.x, particle.vorticity.y, particle.vorticity.z |
Normal | particle.normal.x, particle.normal.y, particle.normal.z |
Neighbors | particle.nv, particle.neighbors, particle.neighbours |
Texture | particle.texture.u, particle.texture.v, particle.texture.w |
Age | particle.age, particle.isolation |
Viscosity | particle.viscosity |
Density | particle.density |
Pressure | particle.pressure |
Temperature | particle.temperature |
Mass | particle.mass |
Collision | particle.collision |
ID | particle.id |
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 |
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