rokojori_action_library/Runtime/VFX/LineVFX/LineMaterial/CustomLineMaterialPreset.cs

using Godot;
using System.Collections.Generic;

namespace Rokojori;

[Tool,GlobalClass]
public partial class CustomLineMaterialPreset:LineMaterialPreset
{
  [Export( PropertyHint.Range, "0.001,128")]
  public float lodBias = 1;

  [Export]
  public Material material;

  [Export]
  public GeometryInstance3D.ShadowCastingSetting shadows = GeometryInstance3D.ShadowCastingSetting.On;

  [Export]
  public LineVFXShaderSetup shaderSetup;

  public override void CreateMaterial( LineVFX lineVFX, MeshInstance3D mi )
  {
    for ( int i = 0; i < mi.GetSurfaceOverrideMaterialCount(); i++ )
    {
      mi.SetSurfaceOverrideMaterial( i, material );
    }

    mi.LodBias = lodBias;
    mi.CastShadow = shadows;
  }

  public override void SetPointData( LineVFX lineVFX, MeshInstance3D mi, LinePointData data, bool start )
  {
    if ( start )
    {
      shaderSetup.start.Set( mi, data );
    }
    else
    {
      shaderSetup.end.Set( mi, data );
    }
  }

  public override void SetLineLength( LineVFX lineVFX, MeshInstance3D mi, float length )
  {
    shaderSetup.lineLength.SetInstance( mi, length );
  } 
}