Lagoa 2 materials/phases with polyganizer

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john clausing

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Nov 12, 2010, 5:45:18 PM11/12/10

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is it possible to generate 2 different materials on 1 polygonizer object using phases?
for instance, oil and water mixing with two different looks

i've set this up and cant get it to work even with the lagoa fluid shaper.....might it be because my emitters are nulls?

thank you

Guillaume Laforge

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Nov 12, 2010, 6:13:45 PM11/12/10

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Hello John,

Generating 2 materials is not possible (as polygonizer can't create material per clusters). But for fluid looking geometries, using two materials
would give you some sharp limits between them with no blending area at all.

The way to go is to use one material. Just get the phases from your point cloud on the polymesh (using an ICEtree with a Get Closest Location to store a custom attribute). Then you can feed a weight map with this attribute and use it in the render tree to mix two (or more) shaders.

Cheers

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

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john clausing

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Nov 12, 2010, 6:26:31 PM11/12/10

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guillaume,

thank you for the quick reply.

im afraid i dont quite understand how that goes.

i have phases set up and its clear that they are "active" (the particles are represented as different colors, and they physically act different)
would you suggest applying these attributes to the lagoa fluid shader?

sorry, im having trouble seeing it.

john

From: Guillaume Laforge <guillaum...@autodesk.com>
To: "soft...@listproc.autodesk.com" <soft...@listproc.autodesk.com>
Sent: Fri, November 12, 2010 6:13:45 PM
Subject: RE: Lagoa 2 materials/phases with polyganizer

Guillaume Laforge

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Nov 12, 2010, 6:44:17 PM11/12/10

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>...would you suggest applying these attributes to the lagoa fluid shader?

The Lagoa Fluid Shaper is a compound to deform your polymesh, it won't help for your material problem.

What you need is to transfert the Phases attribute from the point cloud to your "polygonized" mesh.

First, apply a weight map on this mesh, then create an ICETree. Use a Get Closest Location to get the Phase attribute, then set the weight map using this attribute.

(you will need to re-map the attribute between 0-1 or just change the default range of the weight map).

Then in the render tree using a Color Map Lookup you can get the weight map to mix several shader branches in your material.

I'm not in front of Softimage so I can't help you more tonight :p.

Cheers

Guillaume

guillaume,

john

Hello John,

Cheers

Direct 514 954 7195

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john clausing

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Nov 12, 2010, 6:49:21 PM11/12/10

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thank you

From: Guillaume Laforge <guillaum...@autodesk.com>
To: "soft...@listproc.autodesk.com" <soft...@listproc.autodesk.com>

Sent: Fri, November 12, 2010 6:44:17 PM

Piotrek Marczak

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Nov 12, 2010, 6:52:22 PM11/12/10

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If you need two separate polymeshes for each liquid you can do it by duplicating (plotted) pointcloud and 2 empolygonizers for each pc, with filtering option (inside emp2) set to lagoa phase=x

W dniu 2010-11-13 00:26, john clausing pisze:

john clausing

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Nov 15, 2010, 4:41:56 PM11/15/10

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guillaume,

may i send you a simple scene? i thought i'd had it, but DOH!

not quite.
thank you for your help,

j

From: Guillaume Laforge <guillaum...@autodesk.com>
To: "soft...@listproc.autodesk.com" <soft...@listproc.autodesk.com>

Sent: Fri, November 12, 2010 6:44:17 PM

Guillaume Laforge

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Nov 15, 2010, 8:56:37 PM11/15/10

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Hi John,

I finally found some time to setup a simple scene : http://dl.dropbox.com/u/5533643/Softimage/MixingColorFromLagoaCloud.scn

It is even more simple that in my previous mail as you can directly use the particle color instead of dealing with PhaseID ;).

In this scene, first take a look at the particle ICETree to see how to deal with two emitters (but I think you already figure out this part).
Then in the Polygonizer mesh, expand the cluster folder and select the vertex color property.
Open the ICETree and you will see how to get the Lagoa cloud particle color.
Then re-select the Polygonizer to open a RenderTree to see how to get this color in your shader network.

Hope this help,

Cheers !

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

[Adsk_logo_4_sig_v03_crop.gif]

From: softimag...@listproc.autodesk.com [mailto:softimag...@listproc.autodesk.com] On Behalf Of john clausing
Sent: Monday, November 15, 2010 4:42 PM
To: soft...@listproc.autodesk.com
Subject: Re: Lagoa 2 materials/phases with polyganizer

guillaume,

may i send you a simple scene? i thought i'd had it, but DOH!

not quite.
thank you for your help,

________________________________
From: Guillaume Laforge <guillaum...@autodesk.com>
To: "soft...@listproc.autodesk.com" <soft...@listproc.autodesk.com>
Sent: Fri, November 12, 2010 6:44:17 PM
Subject: RE: Lagoa 2 materials/phases with polyganizer

>...would you suggest applying these attributes to the lagoa fluid shader?

The Lagoa Fluid Shaper is a compound to deform your polymesh, it won't help for your material problem.

What you need is to transfert the Phases attribute from the point cloud to your "polygonized" mesh.

First, apply a weight map on this mesh, then create an ICETree. Use a Get Closest Location to get the Phase attribute, then set the weight map using this attribute.

(you will need to re-map the attribute between 0-1 or just change the default range of the weight map).

Then in the render tree using a Color Map Lookup you can get the weight map to mix several shader branches in your material.

I'm not in front of Softimage so I can't help you more tonight :p.

Cheers

Guillaume

guillaume,

thank you for the quick reply.

im afraid i dont quite understand how that goes.

i have phases set up and its clear that they are "active" (the particles are represented as different colors, and they physically act different)
would you suggest applying these attributes to the lagoa fluid shader?

sorry, im having trouble seeing it.

john

________________________________
From: Guillaume Laforge <guillaum...@autodesk.com<mailto:guillaum...@autodesk.com>>

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

Sent: Fri, November 12, 2010 6:13:45 PM
Subject: RE: Lagoa 2 materials/phases with polyganizer

Hello John,

Cheers

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

[Adsk_logo_4_sig_v03_crop.gif]

image001.gif

john clausing

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Nov 16, 2010, 9:53:55 AM11/16/10

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really great, thank you very much.
i think this has enormous potential for commercial production.........i really appreciate it.

john

From: Guillaume Laforge <guillaum...@autodesk.com>

To: "soft...@listproc.autodesk.com" <soft...@listproc.autodesk.com>
Sent: Mon, November 15, 2010 8:56:37 PM

Thiago Costa

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Nov 16, 2010, 10:11:05 AM11/16/10

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I thought you wanted something like this: http://lagoatechnologies.com/random/phases.png

that's just like what Guillaume did except that there are 3 meshers, one for each phase.

-Thiago

john clausing

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Nov 16, 2010, 10:34:56 AM11/16/10

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the intent was to be able to get two fluids of different character.....say water and honey, and to be able to splash them and shade them appropriately.
i've not had good results "splashing" independent particle streams....the polys always seem to recede from each other? no?

From: Thiago Costa <thiago...@gmail.com>
To: soft...@listproc.autodesk.com
Sent: Tue, November 16, 2010 10:11:05 AM

Thiago Costa

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Nov 16, 2010, 11:57:37 AM11/16/10

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Just depends how much you need to shrink the mesh... You can also do a simple geometry query and approximate one mesh to the other quite easily.

In my experience it also depends more of the rendering than anything else. For example if you have a lot of ambient occlusion you will see a very dark shadow between the two meshes, and that doesn't look good.

-Thiago

Byron Nash

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Dec 9, 2010, 11:33:32 PM12/9/10

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Related to this thread, how could I blur the vertex colors when it goes to the Mesh? Despite my dense mesh and sim, I need less aliasing in the result.

Guillaume Laforge

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Dec 10, 2010, 9:28:11 AM12/10/10

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Hello Byron,

In the link I sent in the beginning of this thread (http://dl.dropbox.com/u/5533643/Softimage/MixingColorFromLagoaCloud.scn) the color is smoothed using a repeat node.
Take a look at the ICETree setting the Color at Vertices.

Cheers

Guillaume

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

[Adsk_logo_4_sig_v03_crop.gif]

From: softimag...@listproc.autodesk.com [mailto:softimag...@listproc.autodesk.com] On Behalf Of Byron Nash
Sent: Thursday, December 09, 2010 11:34 PM
To: soft...@listproc.autodesk.com
Subject: Re: Lagoa 2 materials/phases with polyganizer

Related to this thread, how could I blur the vertex colors when it goes to the Mesh? Despite my dense mesh and sim, I need less aliasing in the result.

On Tue, Nov 16, 2010 at 11:57 AM, Thiago Costa <thiago...@gmail.com<mailto:thiago...@gmail.com>> wrote:
Just depends how much you need to shrink the mesh... You can also do a simple geometry query and approximate one mesh to the other quite easily.

In my experience it also depends more of the rendering than anything else. For example if you have a lot of ambient occlusion you will see a very dark shadow between the two meshes, and that doesn't look good.

-Thiago

On 16 November 2010 10:34, john clausing <jclau...@yahoo.com<mailto:jclau...@yahoo.com>> wrote:
the intent was to be able to get two fluids of different character.....say water and honey, and to be able to splash them and shade them appropriately.
i've not had good results "splashing" independent particle streams....the polys always seem to recede from each other? no?

________________________________
From: Thiago Costa <thiago...@gmail.com<mailto:thiago...@gmail.com>>

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

Sent: Tue, November 16, 2010 10:11:05 AM

Subject: Re: Lagoa 2 materials/phases with polyganizer

I thought you wanted something like this: http://lagoatechnologies.com/random/phases.png
that's just like what Guillaume did except that there are 3 meshers, one for each phase.

-Thiago

On 16 November 2010 09:53, john clausing <jclau...@yahoo.com<mailto:jclau...@yahoo.com>> wrote:
really great, thank you very much.
i think this has enormous potential for commercial production.........i really appreciate it.

john

________________________________

From: Guillaume Laforge <guillaum...@autodesk.com<mailto:guillaum...@autodesk.com>>
To: "soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com>" <soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com>>

Sent: Mon, November 15, 2010 8:56:37 PM

Subject: RE: Lagoa 2 materials/phases with polyganizer

Hi John,

I finally found some time to setup a simple scene : http://dl.dropbox.com/u/5533643/Softimage/MixingColorFromLagoaCloud.scn

It is even more simple that in my previous mail as you can directly use the particle color instead of dealing with PhaseID ;).

Hope this help,

Cheers !

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

[Adsk_logo_4_sig_v03_crop.gif]

guillaume,

may i send you a simple scene? i thought i'd had it, but DOH!

not quite.
thank you for your help,

________________________________

Sent: Fri, November 12, 2010 6:44:17 PM
Subject: RE: Lagoa 2 materials/phases with polyganizer

>...would you suggest applying these attributes to the lagoa fluid shader?

The Lagoa Fluid Shaper is a compound to deform your polymesh, it won't help for your material problem.

What you need is to transfert the Phases attribute from the point cloud to your "polygonized" mesh.

First, apply a weight map on this mesh, then create an ICETree. Use a Get Closest Location to get the Phase attribute, then set the weight map using this attribute.

(you will need to re-map the attribute between 0-1 or just change the default range of the weight map).

Then in the render tree using a Color Map Lookup you can get the weight map to mix several shader branches in your material.

I'm not in front of Softimage so I can't help you more tonight :p.

Cheers

Guillaume

guillaume,

thank you for the quick reply.

im afraid i dont quite understand how that goes.

sorry, im having trouble seeing it.

john

________________________________
From: Guillaume Laforge <guillaum...@autodesk.com<mailto:guillaum...@autodesk.com><mailto:guillaum...@autodesk.com<mailto:guillaum...@autodesk.com>>>

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

Sent: Fri, November 12, 2010 6:13:45 PM
Subject: RE: Lagoa 2 materials/phases with polyganizer

Hello John,

Cheers

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

[Adsk_logo_4_sig_v03_crop.gif]

image001.gif

Byron Nash

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Dec 10, 2010, 11:16:42 AM12/10/10

to soft...@listproc.autodesk.com

I don't see the repeat node in the tree for that scene. Should it be on the Polygonizer or the PointCloud?

Guillaume Laforge

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Dec 10, 2010, 11:35:43 AM12/10/10

to soft...@listproc.autodesk.com

Oh you're right, I was thinking of an other scene (used for this video http://vimeo.com/16995300 )

I have no time now, but I will try to send you something this afternoon !

Cheers

Guillaume

From: softimag...@listproc.autodesk.com [mailto:softimag...@listproc.autodesk.com] On Behalf Of Byron Nash
Sent: Friday, December 10, 2010 11:17 AM
To: soft...@listproc.autodesk.com
Subject: Re: Lagoa 2 materials/phases with polyganizer

I don't see the repeat node in the tree for that scene. Should it be on the Polygonizer or the PointCloud?

On Fri, Dec 10, 2010 at 9:28 AM, Guillaume Laforge <guillaum...@autodesk.com<mailto:guillaum...@autodesk.com>> wrote:
Hello Byron,

Cheers

Guillaume

Guillaume Laforge
Software Developer / Développeur de logiciels
Softimage

Autodesk Canada Co.
10 Duke Street
Montreal, QC, H3C 2L7

Direct 514 954 7195

[Adsk_logo_4_sig_v03_crop.gif]

On Tue, Nov 16, 2010 at 11:57 AM, Thiago Costa <thiago...@gmail.com<mailto:thiago...@gmail.com><mailto:thiago...@gmail.com<mailto:thiago...@gmail.com>>> wrote:
Just depends how much you need to shrink the mesh... You can also do a simple geometry query and approximate one mesh to the other quite easily.

-Thiago

On 16 November 2010 10:34, john clausing <jclau...@yahoo.com<mailto:jclau...@yahoo.com><mailto:jclau...@yahoo.com<mailto:jclau...@yahoo.com>>> wrote:
the intent was to be able to get two fluids of different character.....say water and honey, and to be able to splash them and shade them appropriately.
i've not had good results "splashing" independent particle streams....the polys always seem to recede from each other? no?

________________________________
From: Thiago Costa <thiago...@gmail.com<mailto:thiago...@gmail.com><mailto:thiago...@gmail.com<mailto:thiago...@gmail.com>>>

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

Sent: Tue, November 16, 2010 10:11:05 AM

Subject: Re: Lagoa 2 materials/phases with polyganizer

I thought you wanted something like this: http://lagoatechnologies.com/random/phases.png
that's just like what Guillaume did except that there are 3 meshers, one for each phase.

-Thiago

On 16 November 2010 09:53, john clausing <jclau...@yahoo.com<mailto:jclau...@yahoo.com><mailto:jclau...@yahoo.com<mailto:jclau...@yahoo.com>>> wrote:
really great, thank you very much.
i think this has enormous potential for commercial production.........i really appreciate it.

john

________________________________

From: Guillaume Laforge <guillaum...@autodesk.com<mailto:guillaum...@autodesk.com><mailto:guillaum...@autodesk.com<mailto:guillaum...@autodesk.com>>>
To: "soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com><mailto:soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com>>" <soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com><mailto:soft...@listproc.autodesk.com<mailto:soft...@listproc.autodesk.com>>>