Using custom material variable to pass parameters to PointLine shaders

I am trying to pass custom parameters (state) to my own point and line shaders, so that I can color the geometry depending on whether it is in a selected/unselected state, etc. For this I tried to use the pfParams field from the PointLineMaterialStruct in the shader for which I did the following steps:

1. Overrode PointNode.OnCreateRenderCore to create a custom PointLineRenderCore
2. Defined a render technique using my custom .hlsl shaders and added to a custom EffectsManager class
3. Defined a custom MaterialCore class with an overridden CreateMaterialVariables method to initialize …
4. A custom MaterialVariable class in which I overrode the OnInitialPropertyBindings method to add my custom property bindings for the above states

However, this doesn’t seem to work. The CreateMaterialVariables does not seem to be getting invoked in the first place. The above changes can be found here: https://github.com/DynamoDS/Dynamo/pull/10709

Any advice on whether the above approach is correct or any documentation on how to write a custom material variable to pass additional data to the pointline shaders would be really useful.

[holance]

I added an example to show how to use your own constant buffer. #1360 You may need to use the nightly build, otherwise you may have to duplicate the codes for PointMaterialCore/PointMaterialVariables/PointMaterial.

[holance]

It depends on whether you want to create a special scene node or material. The point line constant buffer still have 2 empty padding slots you can use.

In PointLineRenderCore, you can add some properties to set PointLineModelStruct padding fields. And then you can use those two fields in your pixel shader.

Or create a new constant buffer for your pixel shader, adds a new ConstantBufferComponent like in MaterialVariableBase. Set values for the constant buffer and bind it during BindMaterialResources to the constant buffer slot.