using System.Collections;
using System.Collections.Generic;
using Godot;
using System;
using System.Threading.Tasks;



namespace Rokojori
{
  /** <summary for="class PackedSceneFoliageSource">
      
      <title>
        A FoliageSource that loads the foliage from a MeshInstance reference in the scene.
      </title>
      
      <description>       

      </description>

    </summary>  
  */

  [Tool]
  [GlobalClass]
  public partial class MeshInstanceFoliageSource:FoliageSource
  { 
    [Export]
    public NodePath meshInstanceReference;

    public override void SetupFoliageDrawPass( FoliageRenderLayer renderLayer )
    {
      // var particles = renderLayer.renderer.CreateChild<GpuParticles3D>();

      // renderLayer.gpuParticles3D = particles;

      // var processMaterial = new GPUFoliageShaderMaterial();
      // particles.ProcessMaterial = processMaterial;
      // particles.Lifetime = 0.01f;
      // particles.Explosiveness = 1f;
      // particles.FixedFps = 0;
      // particles.Interpolate = false;
      // particles.FractDelta = false;

      // particles.CustomAabb = Box3.WithSize( 10000 );
      

      // processMaterial.positionVariance.Set( renderLayer.renderer.noise );
      // processMaterial.rotationVariance.Set( renderLayer.renderer.noise );
      // processMaterial.scaleVariance.Set( renderLayer.renderer.noise );
      // processMaterial.occupancyVariance.Set( renderLayer.renderer.noise );

      // renderLayer.gpuFoliageShaderMaterial = processMaterial;

      var particles = renderLayer.gpuParticles3D;
      var meshInstance = renderLayer.renderer.GetNode( meshInstanceReference ) as MeshInstance3D;

      particles.DrawPasses = 1;
      particles.DrawPass1 = meshInstance.Mesh;

      // particles.CastShadow = renderLayer.data.shadows ? GeometryInstance3D.ShadowCastingSetting.On : GeometryInstance3D.ShadowCastingSetting.Off;

    }
  }
}