Hi, I am trying to create look out of my component similar to the one from the Custom Preview Component. As you can see from my images below, my geometry is transparent is not casting shadows. Any ideas on how I should be doing it? public override void DrawViewportMeshes(IGH_PreviewArgs args) { …

Custom Preview does not use the display pipeline to draw geometry, in rendered viewports it will add meshes to the rendering pipeline .

From what I understand I need to implement a CustomMeshProvider as per this link ( https://github.com/mcneel/rhino-developer-samples/blob/53f7108408fd4905e48bda566d15bd87458c7369/rhinocommon/cs/SampleCsRdk/TestCustomMeshProvider.cs ) After that, I will need to run BuildCustomMeshes method in order to …

@andy can you help out? You know more about this api and how to use it correctly than anyone else.

Some help here? I am also interested in using the rendered view from GH components.

Nope - you just need to create a class derived from CustomMeshProvider, give it a public constructor and you should find that your BuildCustomMeshes function is called automatically. In the case of Grasshopper meshes, you should only supply meshes when RenderPrimitiveList.RhinoObject is null.

Hello @andy , could you please post a code example of how to do that in a compiled component? I’m trying to do what you wrote here but when I create the derived class I am asked to implement the abstract methods WillBuildCustomMeshes, BuildCustomMeshes, and the Name field, and I do not know what I am…

@andy , I’m using your suggestion and it works great – with one exception. Whenever my component shares the canvas with a CustomPreview component (with Render enabled), my render-pipeline meshes disappear. They reappear when the CustomPreview Render option is turned off. Is there something I should …

Hello @sarg , I tried to implement @andy 's suggestion too, but when I create the derived class from CustomMeshProvider2 I am asked to implement the abstract methods WillBuildCustomMeshes, BuildCustomMeshes, and the Name field - and I do not know what I am supposed to write in the methods bodies (oth…

Hi @ale2x72 , As @DavidRutten mentions here , the class derived from CustomMeshProvider2 has to be registered to a Rhino plug-in, not a GH add-on. I happen to have both, so I’m registering to the RHP during OnLoad(). Once referenced, the mesh provider is automatically called by Rhino, per @andy ’s not…

Thank you very much, that makes everything a lot clearer to me. Now I’m not sure if in my case it’s worth all the effort to make a Rhino plug-in just for that…

Grasshopper Mesh Rendering Preview in C#

Grasshopper

ale2x72 (Alessio Erioli) July 20, 2023, 3:30pm 14

@ThomasE You might want to check out this post as well: Grasshopper Raytraced Display Pipeline - #7 by enmerk4r

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Grasshopper Mesh Rendering Preview in C#

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