using Delta.ContentSystem.Rendering;

using Delta.ContentSystem.Rendering.Helpers;

using Delta.Engine;

using Delta.Engine.Game;

using Delta.InputSystem;

using Delta.Rendering.Basics.Drawing;

using Delta.Rendering.Basics.Fonts;

using Delta.Rendering.Basics.Materials;

using Delta.Rendering.Cameras;

using Delta.Rendering.Effects;

using Delta.Rendering.Effects.Modifiers;

using Delta.Rendering.Enums;

using Delta.Utilities.Datatypes;

using Delta.Utilities.Helpers;

using Delta.Utilities.Math;

using NUnit.Framework;



namespace Delta.Rendering.EffectTests

{

	/// <summary>

	/// Effect tutorials.

	/// </summary> 

	public class Tutorials

	{

		#region FireEffect (Static)

		/// <summary>

		/// Tutorial: Particle Effect Tutorial 1: Fire Effect

		/// Difficulty: Medium

		/// Description: Draw a simple fire effect.

		/// Image: http://DeltaEngine.net/Icons/EffectTutorial1.png

		/// </summary>

		[Test, Category("Visual")]

		public static void FireEffect()

		{

			// Create a new template.

			EffectData data = EffectData.Get("<FireEffect>");



			// Add emitters and modifiers.

			EmitterData emitter = new EmitterData();

			emitter.Modifiers.Add(new SpawnIntervalModifier

			{

				SpawnInterval = 0.05f,

			});

			emitter.Modifiers.Add(new ParticleLifetimeModifier

			{

				ParticleLifetime = 3f

			});

			emitter.Modifiers.Add(new TimeRangeModifier

			{

				TimeRange = new Range(0f, float.PositiveInfinity),

			});

			Graph alphaFade = new Graph();

			alphaFade.Add(0f, 0f);

			alphaFade.Add(0.1f, 1f);

			alphaFade.Add(1f, 0f);

			emitter.Modifiers.Add(new FadeModifier

			{

				AdvancedAlphaFade = alphaFade,

			});

			emitter.Modifiers.Add(new SizeModifier

			{

				WidthRange = new Range(1f, 0.05f),

				HeightRange = new Range(1f, 0.05f),

			});

			emitter.Modifiers.Add(new MaterialModifier

			{

				Material = new Material2DColored(

					"FlamesAdditive"),

					//"SmokeAdditive")

					//{

					//BlendColor = new Color(1f, 0.5f, 0f),

					//},

			});

			emitter.Modifiers.Add(new RandomSpawnOffsetModifier

			{

				MinOffset = new Vector(-0.02f, 0f, 0f),

				MaxOffset = new Vector(0.02f, 0f, 0f),

			});

			emitter.Modifiers.Add(new RandomVelocityModifier

			{

				MinVelocity = new Vector(-0.01f, -0.08f, 0f),

				MaxVelocity = new Vector(0.01f, -0.1f, 0f),

			});

			data.Emitters.Add(emitter);



			//Effect.Spawn(data, new Vector(0.5f, 0.5f, 0f));

			// Always follow the mouse :)

			Effect.Spawn(data, new MouseTracker());



			Application.Start();

		}

		#endregion



		#region SmokeEffect (Static)

		/// <summary>

		/// Tutorial: Particle Effect Tutorial 2: Smoke Effect

		/// Difficulty: Medium

		/// Description: Draw a simple smoke effect.

		/// Image: http://DeltaEngine.net/Icons/EffectTutorial2.png

		/// </summary>

		[Test, Category("Visual")]

		public static void SmokeEffect()

		{

			// Create a new template.

			EffectData data = EffectData.Get("<SmokeEffect>");

			// Add an emitter and modifiers.

			EmitterData emitter = new EmitterData();

			emitter.Modifiers.Add(new SpawnIntervalModifier

			{

				SpawnInterval = 0.05f,

			});

			emitter.Modifiers.Add(new ParticleLifetimeModifier

			{

				ParticleLifetime = 2f

			});

			emitter.Modifiers.Add(new TimeRangeModifier

			{

				TimeRange = new Range(0f, float.PositiveInfinity),

			});

			emitter.Modifiers.Add(new FadeModifier

			{

				// Create simple graph for fading in and out!

				AdvancedAlphaFade =

				new Graph().Add(0, 0).Add(0.25f, 1.0f).Add(1.0f, 0.0f),

			});

			emitter.Modifiers.Add(new MaterialModifier

			{

				Material = new Material2DColored(

					//"SmokeBrightTransparency"),

					"Smoke"),

					//"SmokeAdditive"),

					//"SmokeSmallAdditive"),

			});

			emitter.Modifiers.Add(new RandomVelocityModifier

			{

				MinVelocity = new Vector(-0.05f, -0.1f, 0f),

				MaxVelocity = new Vector(0.05f, -0.1f, 0f),

			});

			emitter.Modifiers.Add(new RandomRotationModifier

			{

				RotationRange = new Range(0, 360),

			});

			data.Emitters.Add(emitter);

			//Effect.Spawn(data, new Vector(0.5f, 0.5f, 0f));

			// Always follow the mouse :)

			Effect.Spawn(data, new MouseTracker());



			Application.Start();

		}

		#endregion



		#region RocketEffect (Static)

		/// <summary>

		/// Tutorial: Particle Effect Tutorial 3: Rocket Effect

		/// Difficulty: Medium

		/// Description: Draw a simple rocket effect.

		/// Image: http://DeltaEngine.net/Icons/EffectTutorial3.png

		/// </summary>

		[Test, Category("Visual")]

		public static void RocketEffect()

		{

			// Create a new template.

			EffectData data = EffectData.Get("<RocketEffect>");

			// Add an emitter and modifiers.

			EmitterData emitter = new EmitterData();

			emitter.Modifiers.Add(new SpawnIntervalModifier

			{

				SpawnInterval = 0.05f,

			});

			emitter.Modifiers.Add(new ParticleLifetimeModifier

			{

				ParticleLifetime = 4f

			});

			emitter.Modifiers.Add(new TimeRangeModifier

			{

				TimeRange = new Range(0f, float.PositiveInfinity),

			});

			Graph alphaFade = new Graph();

			alphaFade.Add(0f, 0f);

			alphaFade.Add(0.1f, 1f);

			alphaFade.Add(1f, 0f);

			emitter.Modifiers.Add(new FadeModifier

			{

				AdvancedAlphaFade = alphaFade,

			});

			emitter.Modifiers.Add(new SizeModifier

			{

				HeightRange = new Range(1f, 0f),

				WidthRange = new Range(1f, 0f),

			});

			emitter.Modifiers.Add(new MaterialModifier

			{

				Material = new Material2DColored("GlowLightEffect"),

			});

			emitter.Modifiers.Add(new RandomSpawnOffsetModifier

			{

				MinOffset = new Vector(0f, -0.01f, 0f),

				MaxOffset = new Vector(0f, 0.01f, 0f),

			});

			emitter.Modifiers.Add(new RandomVelocityModifier

			{

				MinVelocity = new Vector(0.05f, 0f, 0f),

				MaxVelocity = new Vector(0.05f, 0f, 0f),

			});

			data.Emitters.Add(emitter);

			Effect.Spawn(data, new Vector(0.5f, 0.5f, 0f));



			Application.Start();

		}

		#endregion



		#region SparksEffect (Static)

		/// <summary>

		/// Tutorial: Particle Effect Tutorial 4: Sparks Effect

		/// Difficulty: Medium

		/// Description: Draw a simple sparks effect.

		/// Image: http://DeltaEngine.net/Icons/EffectTutorial4.png

		/// </summary>

		[Test, Category("Visual")]

		public static void SparksEffect()

		{

			// Create a new template.

			EffectData data = EffectData.Get("<SparksEffect>");

			// Add an emitter and modifiers.

			EmitterData emitter = new EmitterData();

			emitter.Modifiers.Add(new SpawnIntervalModifier

			{

				SpawnInterval = 0.1f, //1.5f,

			});

			emitter.Modifiers.Add(new ParticleLifetimeModifier

			{

				ParticleLifetime = 1.0f, //0.4f

			});

			emitter.Modifiers.Add(new TimeRangeModifier

			{

				TimeRange = new Range(0f, float.PositiveInfinity),

			});

			emitter.Modifiers.Add(new RotationModifier

			{

				Rotation = new Range(-90f, 90f),

			});

			emitter.Modifiers.Add(new SizeModifier

			{

				HeightRange = new Range(0.25f, 2.0f),

				WidthRange = new Range(0.25f, 2.0f),

			});

			emitter.Modifiers.Add(new FadeModifier

			{

				AlphaFade = new Range(1.0f, 0.0f),

			});

			emitter.Modifiers.Add(new MaterialModifier

			{

				Material = new Material2DColored("BreakoutEffect"),

			});

			emitter.Modifiers.Add(new RandomSpawnOffsetModifier

			{

				MinOffset = new Vector(-0.025f, -0.025f, 0f),

				MaxOffset = new Vector(0.025f, 0.025f, 0f),

			});

			emitter.Modifiers.Add(new RandomVelocityModifier

			{

				MinVelocity = new Vector(-0.15f, -0.15f, 0f),

				MaxVelocity = new Vector(0.15f, 0.15f, 0f),

			});

			data.Emitters.Add(emitter);

			// Always follow the mouse :)

			Effect.Spawn(data, new MouseTracker());



			Application.Start();

		}

		#endregion



		#region LensFlareEffect (Static)

		/// <summary>

		/// Tutorial: Particle Effect Tutorial 5: Lens-Flare Effect

		/// Difficulty: Medium

		/// Description: Draw a simple lens flare effect.

		/// Image: http://DeltaEngine.net/Icons/EffectTutorial5.png

		/// </summary>

		[Test, Category("Visual")]

		public static void LensFlareEffect()

		{

			// Create a new template.

			EffectData data = EffectData.Get("<LensFlareEffect>");

			// Add an emitter and modifiers.

			EmitterData emitter = new EmitterData();

			emitter.Modifiers.Add(new SpawnOnceModifier());

			emitter.Modifiers.Add(new ParticleLifetimeModifier

			{

				// only show the particle the first tick. The next tick a new one

				// will be spawned.

				ParticleLifetime = 0f,

			});

			emitter.Modifiers.Add(new MaterialModifier

			{

				Material = new Material2DColored("LensflareDTransparency"),

			});

			data.Emitters.Add(emitter);



			Application.Start(delegate

			{

				Circle.DrawFilled(Input.Mouse.Position, 0.05f, Color.Yellow);



				Vector mousePos = new Vector(Input.Mouse.Position, 0f);

				Vector center = new Vector(0.5f, 0.5f, 0f);

				Vector dir = mousePos - center;

				float distanceHalf = dir.Length * 0.5f;

				dir.Normalize();



				Effect.Spawn(data, center + (dir * distanceHalf));

			});

		}

		#endregion



		#region BillboardTest (Static)

		/// <summary>

		/// Tutorial: Particle Effect Tutorial 6: Billboard Test

		/// Difficulty: Medium

		/// Description: Test all the billboard modes.

		/// Image: http://DeltaEngine.net/Icons/EffectTutorial6.png

		/// </summary>

		[Test, Category("Visual")]

		public static void BillboardTest()

		{

			// Create a default camera.

			LookAtCamera cam = new LookAtCamera(new Vector(1, -5, 3));



			BillboardMode currentMode = BillboardMode.CameraFacing;



			// Create the new effect template with the first billboard mode.

			EffectData data = EffectData.Get("<BillboardModeTest>");

			// Add an emitter and modifiers.

			EmitterData emitter = new EmitterData();

			emitter.Modifiers.Add(new AlwaysSpawnModifier());

			emitter.Modifiers.Add(new SizeModifier

			{

				HeightRange = new Range(10),

				WidthRange = new Range(15),

			});

			MaterialModifier materialModifier = new MaterialModifier

			{

				Material = new MaterialColored("DeltaEngineLogo")

				{

					DrawLayer = RenderLayer.Normal,

					BlendColor = Color.White,

				},

				BillboardMode = BillboardMode.CameraFacingPrecise,

			};

			materialModifier.BillboardMode = currentMode;

			emitter.Modifiers.Add(materialModifier);

			data.Emitters.Add(emitter);



			int effectId = Effect.Spawn(data, Vector.Zero);



			// Start the application.

			Application.Start(delegate

			{

				// Draw a grid for orientation.

				Grid.Draw();

				// Show which mode we're currently using.

				Font.Default.Draw("currentMode=" + currentMode,

					new Rectangle(0.0f, ScreenSpace.DrawArea.Top, 1.0f,

						Font.Default.LineHeight));



				// Every time we hit enter or release a touch we want to go to the

				// next billboard mode for easy debugging of all modes.

				if (Input.Keyboard.EnterReleased ||

				    Input.Touch.TouchReleased)

				{

					// Go to the next mode

					currentMode = (BillboardMode)currentMode.Next();

					// Skip the only2D mode cause this is working in all the 2d tests

					// anyways.

					if (currentMode == BillboardMode.Only2D)

					{

						currentMode = (BillboardMode)currentMode.Next();

					}



					// Kill the previous effect if it exists.

					if (effectId != MathHelper.InvalidIndex)

					{

						Effect.Kill(effectId);

					}



					// Set the current mode and then spawn the new effect.

					materialModifier.BillboardMode = currentMode;

					effectId = Effect.Spawn(data, Vector.Zero);

				}

			});

		}

		#endregion

	}

}