using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace Kav
{
    public class Deferred_ToonEffect : Effect
    {
        EffectParameter gPositionParam;
        EffectParameter gAlbedoParam;
        EffectParameter gNormalParam;

        EffectParameter eyePositionParam;
        EffectParameter directionalLightDirectionParam;

        public Texture2D GPosition { get; set; }
        public Texture2D GAlbedo { get; set; }
        public Texture2D GNormal { get; set; }

        public Vector3 EyePosition { get; set; }
        public Vector3 DirectionalLightDirection { get; set; }

        public Deferred_ToonEffect(GraphicsDevice graphicsDevice) : base(graphicsDevice, Resources.Deferred_ToonEffect)
        {
            CacheEffectParameters();   
        }

        protected override void OnApply()
        {
            gPositionParam.SetValue(GPosition);
            gAlbedoParam.SetValue(GAlbedo);
            gNormalParam.SetValue(GNormal);
            
            eyePositionParam.SetValue(EyePosition);
            directionalLightDirectionParam.SetValue(DirectionalLightDirection);
        }

        void CacheEffectParameters()
        {
            gPositionParam                 = Parameters["gPosition"];
            gAlbedoParam                   = Parameters["gAlbedo"];
            gNormalParam                   = Parameters["gNormal"];

            eyePositionParam               = Parameters["EyePosition"];
            directionalLightDirectionParam = Parameters["DirectionalLightDirection"];
        }
    }
}