using Godot;

public partial class Background : Control
{
    public override void _Ready()
    {
        var rect = GetNode<ColorRect>("SwirlRect");
        m_SwirlMaterial = rect.Material as ShaderMaterial;

        m_Particles = GetNode<GpuParticles2D>("DustParticles");
        m_ParticlesProcess = m_Particles.ProcessMaterial as ParticleProcessMaterial;
    }

    public override void _Process(double delta)
    {
        m_Particles.Position = Size / 2;
        ((ParticleProcessMaterial)m_Particles.ProcessMaterial).EmissionBoxExtents = new(Size.X / 2, Size.Y / 2, 1);
        Refresh();
    }

    public void Refresh()
    {
    }

    private GpuParticles2D m_Particles;
    private ParticleProcessMaterial m_ParticlesProcess;

    private ShaderMaterial m_SwirlMaterial;
}