Thinking Particles - geom Instance/surface Pos/Timer

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  03 March 2013
Thinking Particles - geom Instance/surface Pos/Timer

Hi, I have a question.
I make some tests and I do something like this.
I have a Sphere as geom instance that appear
at collision point of particle(red) and UDeflector.
I also attached to the vertices of the geom Instance sphere
some particles (blue) with SurfacePos node.
And all this work very good.
But I did some size animation to geom Instance (SphereGroup / particle Age / Timer / animated float/ Size) to have an effect of the growing sphere.
Size animation works very well, but the (blue) particles dont stick to vertices any more.

  03 March 2013
does SurfacePos node have a "surface animated" check box?
[Invivo Animation Reel]
  03 March 2013
no, it has Time input but don't know how to use it wit surf pos
  03 March 2013
I'm not sure how you going about attaching the blue particle to the red growing particles, but you need to update the position on the vertexes of the deforming geo per sample. This way the blue particle know where the vertex have moved each sample.

you can use a set reference or memory node(particle) when you birth the blue particles per red ones. So the blue groups know who their parent(red particle) is.

Your now creating a relationship between the two groups.

Then in a new Dynamic set you can use the red group and access the blue (through get reference or memory). Use the the surface node , "particle shape" input (this connects to the red group) "Particle"(connects to the blue group), then use a position node with the position output from the surface node, to the blue group. the blue particle should follow.


  03 March 2013
Sounds like right solution.
I will try this today and will let you know if it works.

  03 March 2013
It works

I use Set Reference and Get Reference
and than Position Follow.

Thank You very much for help.
I love TP
  03 March 2013
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