The first test for a custom Blender 2.5 AddOn python script that emulates the Cinema 4D tracer object. Using this script, you can trace the path of a particle system. It updates in playback mode and responds to fields and particle system changes, automatically.
In the center, a simple plane is emitting particles. Around the plane is a BezierCircle path. An Empty with a Wind force field is constrained to the circle path and tracks to the emitter in the center. The wind affects the particles as they emerge from the emitter. The tracer addon code manages a set of tapered and beveled curves along the traced particle paths. Whenever the frame changes, the system re-evaluates the setup and makes adjustments on-the-fly, including user animatable parameters which can affect the final output.
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