Wish - predefine default texture settings

pascal · November 17, 2023, 10:25pm

@BrianJ - is any of this on your list of complaints yet?

-Pascal

BrianJ · November 20, 2023, 2:19pm

Reading back through this thread it looks like the main problem is that Octane’s WCS mapping setting within it’s native materials is not displaying in Rhino’s Rendered display mode. AND that if you reverse this and use a Rhino native material with WCS mapping, it is not displayed properly in Octane’s realtime rendered viewport.

I think both issues would need to be addressed in the Octane plugin. I will try and get @andy to reply here to confirm my guess. The only other idea I have is to select multiple objects in Rhino and convert their texture mapping properties at the same time to box mapping. This will save you time if you have been doing this properties change one object at a time. The difference there is that this is then a custom mapping setting per object that Octane appears to support based on your earlier posts here. The ideal solution though is I think for Octane’s WCS mapping in it’s materials to be converted to Rhino WCS mapping in Rhino’s rendered display mode.

walther · November 20, 2023, 2:53pm

First of all thank you Brian for taking the time to look into this, it is really appreciated!

you are right, we have two issues, however issue no. 2 (a Rhino WCS material is not rendered correctly in Octane) is not such a big issue for me, since if you use the Octane renderer, you normally also use Octane materials. However as I said it would be nice to have and IMHO should work since Octane is a valid render engine for Rhino.
your Idea to of selecting multiple objects and assigning box mapping to them in one single operation, is more or less what I am currently doing, I even wrote a few macros to make the process less painful but it is a very cumbersome workaround, because you always have exceptions like e.g. objects where you need to assign a different mapping mode or other mapping sizes.

The ideal solution though is I think for Octane’s WCS mapping in it’s materials to be converted to Rhino WCS mapping in Rhino’s rendered display mode.

Exactly!

BrianJ · November 20, 2023, 3:26pm

You’re welcome! I believe our UV guru @Jussi_Aaltonen will be able to help communicate to the Octane developers on this issue.

pkinnane · November 20, 2023, 10:31pm

Please forgive me if I have misunderstood the issue. However I think the problem is that the Octane Material needs to be converted to a Rhino Material via SimulateMaterial() in order to display in the Rhino Viewport. In SimulateMaterial, the Texture would need to have Box Mapping applied. I don’t see a way to do this in a RhinoCommon Texture (to be used in simulatedMaterial.SetTexture()) as per https://developer.rhino3d.com/api/rhinocommon/rhino.docobjects.texture .

Thanks

Paul

Jussi_Aaltonen · November 22, 2023, 12:58pm

Hi @walther

How is Octane converting its materials to Rhino materials at the moment?

walther · November 22, 2023, 1:12pm

Hi Jussi,

that is a question you might want to ask @pkinnane (Paul) who is the developer of the Octane for Rhino plugin.

walther · November 22, 2023, 2:05pm

I made a test scene with two Boxes of 10m x 10m x 10m.

One is assigned an Octane material with a Box projection instead of the default “mesh UV projection” (scale 1/1/1).

The other one has a Rhino material with a "WSC / OCS (box style) definition for its texture (texture size 1).

Both should display 10 circles in each of their dimension axis in the Rhino viewport, and the rendered Image.

I attached the scene as a zip file

WCS Test.zip (462.2 KB)

I will send @pkinnane the same file on the octane forum.

pkinnane · November 22, 2023, 11:36pm

The plugin is taking the components from the Material and RenderMaterial (in particular the material.GetTexture(TextureType.Bitmap)) to determine the bitmap filename and projection for Octane. I cannot see in the RhinoCommon docs were to access the Texture’s “Mapping”->“WSC/OCS (box style)” property. Where is this contained please?

Thanks

Paul

nathanletwory · November 23, 2023, 5:06am

You’ll be better of using RenderMaterial and RenderTexture. On the latter the projection mode is through the method GetProjectionMode(). Here is how I use that in RhinoCycles integration:

github.com

mcneel/RhinoCycles/blob/836e44982a565e7eee9d4e77a27d0ae2a375e774/Utilities.cs#L159


      
          			var repeatvec = rt.GetRepeat();
          			var offsetvec = rt.GetOffset();
          
          			Transform tt = new Transform(
          				(float)offsetvec.X, (float)offsetvec.Y, (float)offsetvec.Z, 0.0f,
          				(float)repeatvec.X, (float)repeatvec.Y, (float)repeatvec.Z, 0.0f,
          				(float)rotationvec.X, (float)rotationvec.Y, (float)rotationvec.Z, 0.0f
          			);
          
          
          			var projectionMode = rt.GetProjectionMode();
          			var envProjectionMode = rt.GetInternalEnvironmentMappingMode();
          			var repeat = rt.GetWrapType() == TextureWrapType.Repeating;
          
          			GatherAdjustments(rt, tex);
          
          			var use_color_mask = false;
          			{
          				var use_mask = rt.GetParameter("has-transparent-color");
          				if (use_mask != null)
          				{

The method documentation is RenderTexture.GetProjectionMode Method

FWIW, these have existed already since before Rhino 6, and the ChangeQueue method already since Rhino 6.

pkinnane · November 23, 2023, 10:46pm

Thanks @nathanletwory - I will try that.

Reversing the question…how is “WSC/OCS (box style)” specified in SimulateMaterial() please?

Thanks

Paul

nathanletwory · November 24, 2023, 5:06am

I don’t know how to get to the mapping settings of an old-style Texture instance through RhinoCommon. That is something @andy will know.

pkinnane · November 29, 2023, 6:22am

I have the Rhino Material->Octane Material conversion working nicely.

Now just waiting on a response from my question above to do the other direction, which was what Andreas was originally after.

Thanks

Paul

walther · December 1, 2023, 10:18am

@andy can you please help @pkinnane with his question:

?

Thank you!

Andreas

Jussi_Aaltonen · December 4, 2023, 8:13am

@pkinnane

You need the Rhino.Render.RenderTexture to get the projection mode.
Rhino.Render.RenderMaterial.SlotFromTextureType gives you the StandardChildSlots which you need to pass to the RenderMaterial.GetTextureFromUsage which will then return you the corresponding RenderTexture.

Jussi_Aaltonen · December 4, 2023, 8:56am

@pkinnane Sorry, I probably misunderstood your question. Are you creating a Rhino material of an Octane material now? And you need to tell that this Rhino material should use WCS projection? So you’re actually setting up a Rhino.DocObjects.Texture which then of course doesn’t have an associated Rhino.Render.RenderTexture.

pkinnane · December 5, 2023, 5:32am

I am trying to tell the Rhino viewport how to display the Octane Material via simulateMaterial(), specifically, how to tell the Rhino viewport to use WCS projection on the texture map that is specified in simulateMaterial()

So you’re actually setting up a Rhino.DocObjects.Texture which then of course doesn’t have an associated Rhino.Render.RenderTexture

Correct

Paul

walther · December 7, 2023, 11:18am

Just trying to keep the momentum here

@Jussi_Aaltonen
can you help @pkinnane to have a correct representation of the WCS Octane material in the viewport? Do you need additional information?

Thanks

Andreas

Jussi_Aaltonen · December 12, 2023, 8:53am

I’ve added ProjectionMode property to Rhino.DocObjects.Texture in Rhino 8.3 which will possibly be available as a release candidate in a couple of days. RH-78920

So you can change your simulated texture to use WCS projection by setting
mySimulation.ProjectionMode = TextureProjectionModes.Wcs;

pkinnane · December 12, 2023, 11:39pm

Awesome - thanks @Jussi_Aaltonen

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Wish - predefine default texture settings

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