Texture Mapping Surfaces

Replies to This Discussion

Permalink Reply by David Rutten on May 17, 2017 at 8:09am

Rhino supports texture mapping projections per object (cubic, spherical, cylindrical, uv etc) but I have no idea how any of that works. It's also possible that those properties are stored on the attributes of Rhino objects, instead of on the geometry. I think you're better off asking on the discourse forum, that's where you'll find the programmers who made those features.

Permalink Reply by John on May 17, 2017 at 11:28am

Thanks I found on the forum this :

private void RunScript(Guid x, Brep y, Plane p, ref object A)
{

Rhino.Render.TextureMapping textureMapping = Rhino.Render.TextureMapping.CreatePlaneMapping(p, new Interval(-400, 400), new Interval(-400, 400), new Interval(0, 1));
Rhino.DocObjects.Tables.ObjectTable.ModifyTextureMapping(x, 1, textureMapping);

}

http://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_DocObject...

But I get error:

Error (CS0120): An object reference is required for the non-static field, method, or property 'Rhino.DocObjects.Tables.ObjectTable.ModifyTextureMapping(System.Guid, int, Rhino.Render.TextureMapping)' (line 74)

What does this error mean?

Permalink Reply by Mateusz Zwierzycki on May 17, 2017 at 12:26pm

You're calling ModifyTextureMapping like it was a static method, you have to access the ObjectTable of the current document. 

It should go like

Rhino.RhinoDoc.ActiveDoc.Objects.ModifyTextureMapping(...) 

and you have 

Rhino.DocObjects.Tables.ObjectTable.ModifyTextureMapping(...)

Permalink Reply by John on May 17, 2017 at 12:31pm

Works, thanks :)

Permalink Reply by John on May 17, 2017 at 1:01pm

Mapping channel by default is 1.

If somebody needs this:

Rhino.Render.TextureMapping textureMapping = Rhino.Render.TextureMapping.CreatePlaneMapping(p, new Interval(-400, 400), new Interval(-400, 400), new Interval(0, 1));

Rhino.RhinoDoc.ActiveDoc.Objects.ModifyTextureMapping(x, 1, textureMapping);

Permalink Reply by roy orengo on March 16, 2020 at 4:34pm

Hi John!

I'm one of somebody needs this. But i 'm not a programmer and i don't understand how to use this code. COuld you seggest me how mapping brep in grasshopper in a more easy way..?

thanks,

Regards,

Roy

Permalink Reply by Matt on December 7, 2018 at 8:53am

I'm attempting to make a C# component that allows for texture mapping meshes on multiple channels. Here is the code I have so far (M is a mesh, P is a plane, and X and Y are intervals):

Rhino.Render.TextureMapping textureMapping1 = Rhino.Render.TextureMapping.CreatePlaneMapping(P, X, Y, new Interval(0, 1));
Rhino.Render.TextureMapping textureMapping2 = Rhino.Render.TextureMapping.CreatePlaneMapping(P, new Interval(0, 1), new Interval(0, 1), new Interval(0, 1));
M.TextureCoordinates.SetTextureCoordinates(textureMapping2); //M.TextureCoordinates.SetTextureCoordinates(textureMapping2, 2)
M.TextureCoordinates.SetTextureCoordinates(textureMapping1); //
//M.TextureCoordinates.SetTextureCoordinates(textureMapping1, 1); //

It appears that texture mapping per channel isn't allowed on the mesh or am I missing something? If these attributes are on rhino objects instead of the geometry, does that mean 1) I have to bake the meshes and then run a secondary script which gives them their second texture mapping or 2) convert the meshes to surfaces in grasshopper and apply the mapping per channel as a rhino object? If 2, then how do I set the Guid x as the mesh? From my attempts I'm assuming I have to bake and then texture for the second channel, but wanted to check in case I'm missing something. (From the code above one channel is working completely correctly).