using Godot;
using System;
using System.Collections.Generic;

[Tool]
public partial class MetaBallAssigner : Node
{
  [Export]
  public Node3D metaBallA;

  [Export]
  public Node3D metaBallB;
  
  [Export]
  public Node3D metaBallC;

  [Export]
  public Node3D metaBallD;
  
  [Export]
  public Node3D metaBallE;
  
  [Export]
  public Node3D metaBallF;

  [Export]
  public ShaderMaterial material;


  public override void _Process( double delta )
  {
    GD.Print( "AS" );
    SetMetaBall( metaBallA, "A" );
    SetMetaBall( metaBallB, "B" );
    SetMetaBall( metaBallC, "C" );

    SetMetaBall( metaBallD, "D" );
    SetMetaBall( metaBallE, "E" );
    SetMetaBall( metaBallF, "F" );
  }

  void SetMetaBall( Node3D node, string metaBallIndex )
  {
    var location = node.GlobalPosition;
    var scale    = node.Scale.Length();
    var value = new Vector4( location.X, location.Y, location.Z, scale );
    material.SetShaderParameter( "metaBall" + metaBallIndex, value );
  }
}