Particle forming a shape/letter

#21

I trying to recreate that effect:
http://vimeo.com/17233133
Thanks.

#22

There were two different techniques Anselm and I used. Each with there equal strengths and weaknesses.

Anselm developed the Birth Grid system and it requires Box#3 to control the visibility of a particle that lies in the bounds of an object with changing topology. I have a brief explanation on using Box#3 for visibility here. It pitfall is that you need a grid that encompasses the bounds of the entire animation, which can lead to an excessively high particle count (particles that aren’t even visible)

The second was done with a Krakatoa PRT Volume, a PRT Loader, then piped back into PFlow. It is pitfall is the particle ID channel. Since PRT Volume doesn’t enumarate its particles in the sense that each particle doesn’t have its own unique ID for life based on a voxel grid, you end up recreating a new particle every frame in pflow as a sanity check.

Wait another week or so and you can do this with Frost :wink: It is approx. 50-70% faster performance-wise compared to the two later techniques and without either of the restrictions. :slight_smile:

There are also a couple of scripts that can do this too, all of these seem to be in the same speed range though.

#23

My Box#3 DVD covers this topic as well. But John laid it out for you pretty good already :slight_smile:

PRT volumes, a KCM to inherit object mapping and textures/vertex color and Frost for fast shape instances is how to do it from here on out once Frost is released.

#24

Thanks for answers. :).
You both are best :bowdown:

#25

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