Is it possible to use the Decal Methods in the RhinoCommon library to update decal application based on a variable point position? I am struggling to find documentation and the Decal constructors aren’t working for me at the moment.

[image] clement: The link to the bug report is dead. It was not dead, just not set to publicly readable - but that I changed now. [image] clement: can you show an example Let me see if I can whip up something. It is going to involve: https://developer.rhino3d.com/api/RhinoCommon/html…

Hi @nathanletwory , yes, i am trying to apply a decal using a python script. So far i created a simulated texture: sim = Rhino.Render.SimulatedTexture() sim.Filename = r"D:\Temp\MyImage.png" sim.MappingChannel = 1 Next i created a RenderTexture from this using: rt = Rhino.Render.RenderTexture.New…

Your code is very close to how I would write it: https://jesterking.github.io/rhipy/create_decal.html I do notice buggy behavior with adding decals once you’ve already added one to an object. I have logged RH-67878 Attempts to add more decals after first fail to track that.

Hi @nathanletwory , thanks for confirming the bug. Your report might include that even when the Decals table is cleared before adding, you cannot add a decal once one was ever added before. There is clearly something wrong. Your example code does not use an image file, i wonder how you would assign …

[image] clement: Your example code does not use an image file, i wonder how you would assign it ? I used https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Render_RenderContent_Create.htm , which is available from Rhino 7.9 onward. If you need older Rhino then https://developer.rhino3d…

[image] nathanletwory: Did you read the explanation on https://jesterking.github.io/rhipy/create_decal.html of how this works to create the texture? Yes, it is basically a copy of the code i posted but it does neither use an image file (from disk), nor does it create any entries in the Decals…

Hi @nathanletwory , two follow up questions (Rhino 7): can i programmatically show the decal widget ? I’ve tried to script the _Properties _Decals command but there is only an option to _Add. If you create one decal with your script in Rhino 7, does the Textures panel remain empty on your side too? …

[image] clement: RH-64608 (which i cannot see). I changed the visibility some 17 hours ago: RH-64608 Make it possible to set decal properties. You should be able to see it. [image] clement: Yes, it is basically a copy of the code i posted but it does neither use an image file (from disk)…

Thank you @nathanletwory , i’ll try now with the new example code. [image] nathanletwory: Note that in my script version you need to have an object selected for the decal to be even added, and over the world origin for the decal to show once added. Ok, i noticed that and see it working in Rhi…

Hi @clement ! Do you have a working snippet of code for the Decals you can share here? Much appreciate

GhPython/RhinoCommon Decal Placement

Scripting

brian (Brian Gillespie) March 5, 2025, 1:04am 31

RH-64608 is fixed in Rhino WIP

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GhPython/RhinoCommon Decal Placement

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