Shared tag between SceneNode and RenderablePrimitiveBase

Shared tag between SceneNode and RenderablePrimitiveBase - Printable Version

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Shared tag between SceneNode and RenderablePrimitiveBase - janovrom - 08-20-2021

Hi,

I've started writing my own rendering step to show normals using geometry shader and an OverrideEffect. It's working fairly well, except that I need to filter the objects. For that I am using FilterObjectsFunction in the rendering step.

There I need to recognize the objects to show normals on (currently it's all using PBMaterial or MultiMapMaterial). That is easy to check, but I've noticed that RenderablePrimitiveBase has a property "Tag". This tag is always null so I was wondering how to populate this with a value (then it would be possible to filter the objects by anything I want - name, animations, selection etc.).

I am using MeshObjectNode to render most of the objects and they also have property Tag (which I am using to set some data for raycasts and selection). Is it possible to somehow inherit the Tag from SceneNode to RenderablePrimitiveBase?

I cannot use RenderQueue filtering since I cannot set an object into multiple queues and I cannot override MeshObjectNode to extend the method CollectRenderableObjects (it's sealed). Writing custom collection seems as an overkill as well.

Thanks,
Roman Janovsky

RE: Shared tag between SceneNode and RenderablePrimitiveBase - abenedik - 08-20-2021

You can check the Tag on the MeshObjectNode inside your FilterObjectsFunction - for example:

Code:
private static bool FilterObjectsByTagFunction(RenderablePrimitiveBase renderablePrimitiveBase)

{

    var originalSceneNode = renderablePrimitiveBase.OriginalObject as SceneNode;

    if (originalSceneNode != null)

    {

        var tag = originalSceneNode.Tag;

        return true; // Add check

    }

    return false;

}

RE: Shared tag between SceneNode and RenderablePrimitiveBase - janovrom - 08-23-2021

For some reason, the OriginalObject property is SceneNode only for lines, i.e. ScreenSpaceLineNode that is created from wire grid.

All objects created from meshes have OriginalObject set to SimpleMesh<T>.