ICE: Switching geometry emitter

[Chris Marshall]

Hi,

I have three objects I want to emit particles from, but not all at the same time, with one pointcloud. Is there a way to use emit from geometry, and switch between the three pieces of geometry? I guess I could use three emit from geometry compounds and just change the emission individually, but I thought maybe there'd be a way of using a Group Geometry plugged into 1 emit compound or similar and toggle which is the emitter geometry at any one time?

I thought generate sample set might work but I'm getting context errors.

Any ideas?

Thanks

Chris

[Sandy Sutherland]

Can you not use 'if' nodes and use an integer or something to drive the selection?

S.

_____________________________
Sandy Sutherland
Technical Supervisor
sandy.su...@triggerfish.co.za
_____________________________

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From: softimag...@listproc.autodesk.com [softimag...@listproc.autodesk.com] on behalf of Chris Marshall [chrisma...@gmail.com]
Sent: 18 May 2012 16:10
To: soft...@listproc.autodesk.com
Subject: ICE: Switching geometry emitter

[Chris Marshall]

Well that seems to work if after the emit node, but that means you need three emit nodes and I'd hoped to have just one. I was thinking of plugging the three pieces of geometry into a conditional type thing which I could use to switch between them, before the emit node.

[Peter Agg]

HACKY WORKAROUND WARNING!!!

If you Generate a Sample Set, get the PointPosition from the locations and then create an array out of it you can plug that data into an Add Point node without context issues.

Dirty, isn't it? :)

[Chris Marshall]

Great solution!!!

Thanks a lot

[Stephen Blair]

Put a per-point attribute on each emitter object (eg self._groupID)

In the emit ice tree, use emit location to get the groupID and delete the points if they are not from the object you want to be emitting at that point in time

From: softimag...@listproc.autodesk.com [mailto:softimag...@listproc.autodesk.com] On Behalf Of Peter Agg
Sent: May-18-12 10:40 AM
To: soft...@listproc.autodesk.com
Subject: Re: Switching geometry emitter

HACKY WORKAROUND WARNING!!!

If you Generate a Sample Set, get the PointPosition from the locations and then create an array out of it you can plug that data into an Add Point node without context issues.

Dirty, isn't it? :)

On 18 May 2012 15:24, Chris Marshall <chrisma...@gmail.com<mailto:chrisma...@gmail.com>> wrote:
Well that seems to work if after the emit node, but that means you need three emit nodes and I'd hoped to have just one. I was thinking of plugging the three pieces of geometry into a conditional type thing which I could use to switch between them, before the emit node.

On 18 May 2012 15:16, Sandy Sutherland <Sandy.Su...@triggerfish.co.za<mailto:Sandy.Su...@triggerfish.co.za>> wrote:
Can you not use 'if' nodes and use an integer or something to drive the selection?

S.

_____________________________
Sandy Sutherland
Technical Supervisor

sandy.su...@triggerfish.co.za<mailto:sandy.su...@triggerfish.co.za>
_____________________________



________________________________
From: softimag...@listproc.autodesk.com<mailto:softimag...@listproc.autodesk.com> [softimag...@listproc.autodesk.com<mailto:softimag...@listproc.autodesk.com>] on behalf of Chris Marshall [chrisma...@gmail.com<mailto:chrisma...@gmail.com>]

Sent: 18 May 2012 16:10

To: soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com>

[Vladimir Jankijevic]

put a per-object boolean (eg self.emit) attribute on each emitter object,

make a group of all of them,

connect that group to a generate sample set node,

set the filter attribute in that node to your chosen boolean attribute,

now you can switch on which object to emit by setting the attribute to true or false on each respective object.

--
---------------------------------------
Vladimir Jankijevic
Technical Direction

Elefant Studios AG
Lessingstrasse 15
CH-8002 Zürich

+41 44 500 48 20

www.elefantstudios.ch
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[Chris Marshall]

Thanks,

All interesting solutions. I'm using a variation on Peters Array idea.

Cheers

--

Chris Marshall

Mint Motion Limited

029 2002 5762

07730 533 115

www.mintmotion.co.uk