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- Create a standard particle emitter of your choice ("Square", "Circle", "Triangle", "Sphere", "Cylinder", etc.) as the particle source.
- Add a "Container" node to store the tracer particles.
- Important: Use exactly the same "Resolution" for both emitters.
- Set the emitter's "Type" to "Dumb".
- Decrease "MAX substeps" to 20 under → Simulation options > General.
- For better results add a "Noise Field" daemon and set its "Strength" to values around 3.
- Display the "Container" node's particles as spheres: Container01 > Node Params > Display type > Sphere, and change "Size" to 0.015.
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# Stop adding new particles after particleLimit # Get the standard particle emitter and a container - both must have the same "Resolution" particleLimit = 100000 sourceEmitter = scene.get_PB_Emitter("Sphere01") # Change the name to the actual emitter's name, e.g. "Circle01" or "Bitmap01". tracerEmitter = scene.get_PB_Emitter("Container01") nullVelocity = Vector.new(0,0,0) # Get the emitters' particles sourceParticles = sourceEmitter.getParticles() tracerParticles = tracerEmitter.getParticles() # Check if the limit has been reached. If not, continue... if (len(tracerParticles) <= particleLimit): # Go through the source particles and a new particle at the current position, freeze the new particle for particle in sourceParticles: newParticle = tracerEmitter.addParticle(particle.getPosition(), particle.getVelocity()) newParticle.freeze() # Stop adding new particles by deleting the sources, simulation goes on though else: sourceEmitter.removeAllParticles() |
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