Yay, dynamic shadows!

DepthsBelow/DepthsBelow/Camera.cs

@@ -42,6 +42,9 @@ namespace DepthsBelow
 
 		public void Update(GameTime gameTime)
 		{
+			if (!core.IsActive)
+				return;
+
 			float elapsed = gameTime.ElapsedGameTime.Milliseconds / 1000.0f;
 
 			MouseState ms = Mouse.GetState();

DepthsBelow/DepthsBelow/Core.cs

@@ -19,6 +19,8 @@ namespace DepthsBelow
 		GraphicsDeviceManager graphics;
 		SpriteBatch spriteBatch;
 
+		public Krypton.KryptonEngine KryptonEngine;
+
 		public Camera Camera;
 
 		public static MouseInput MouseInput;
@@ -39,6 +41,8 @@ namespace DepthsBelow
 			graphics.ApplyChanges();
 
 			this.IsMouseVisible = true;
+
+			KryptonEngine = new Krypton.KryptonEngine(this, "KryptonEffect");
 		}
 
 		/// <summary>
@@ -50,6 +54,13 @@ namespace DepthsBelow
 		protected override void Initialize()
 		{
 			// TODO: Add your initialization logic here
+
+			// Initialize lighting engine
+			this.KryptonEngine.Initialize();
+			this.KryptonEngine.SpriteBatchCompatablityEnabled = true;
+			this.KryptonEngine.CullMode = CullMode.CullClockwiseFace;
+			this.KryptonEngine.AmbientColor = new Color(35, 35, 35);
+
 			Camera = new Camera(this);
 			Squad = new List<Soldier>();
 
@@ -67,7 +78,22 @@ namespace DepthsBelow
 
 			Map = Content.Load<Map>("maps/Cave.Level1");
 			// Load map objects
-			Map.ParseObjects(this);
+			Map.Initialize(this, KryptonEngine);
+
+			// DEBUG: Test lights
+			var light = new Krypton.Lights.Light2D()
+				{
+					Texture = Krypton.LightTextureBuilder.CreatePointLight(this.GraphicsDevice, 512),
+					Range = (float)(200),
+					Color = Color.White,
+					Intensity = 1f,
+					Angle = MathHelper.TwoPi,
+					X = 17 * Grid.TileSize,
+					Y = 7 * Grid.TileSize,
+					Fov = MathHelper.TwoPi,
+					IsOn = true
+				};
+			this.KryptonEngine.Lights.Add(light);
 
 			// TODO: use this.Content to load your game content here
 			Soldier.LoadContent(this);
@@ -103,6 +129,9 @@ namespace DepthsBelow
 			foreach (var soldier in Squad)
 				soldier.Update(gameTime);
 
+			foreach (Krypton.Lights.Light2D light in KryptonEngine.Lights)
+				light.Position = Camera.ScreenToWorld(new Vector2(Mouse.GetState().X, Mouse.GetState().Y));
+
 			base.Update(gameTime);
 		}
 
@@ -112,25 +141,43 @@ namespace DepthsBelow
 		/// <param name="gameTime">Provides a snapshot of timing values.</param>
 		protected override void Draw(GameTime gameTime)
 		{
+			// Assign the matrix and pre-render the lightmap.
+			this.KryptonEngine.Matrix = Camera.Transform;
+			this.KryptonEngine.Bluriness = 1;
+			this.KryptonEngine.LightMapPrepare();
+
 			GraphicsDevice.Clear(Color.Black);
 
-			// Start drawing using the Camera transform
-			spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, null, null, null,
-			                  Camera.Transform);
+			/*
+			 *	Draw game world
+			 */
+			spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, null, null, null, Camera.Transform);
 
-			// Draw the level
-			Map.Draw(spriteBatch);
+				// Draw the level
+				Map.Draw(spriteBatch);
 
-			// Draw units
-			foreach (var soldier in Squad)
-			{
-				var sr = soldier.GetComponent<Component.SpriteRenderer>();
-				if (sr != null)
-					sr.Draw(spriteBatch);
-			}
+				// Draw units
+				foreach (var soldier in Squad)
+				{
+					var sr = soldier.GetComponent<Component.SpriteRenderer>();
+					if (sr != null)
+						sr.Draw(spriteBatch);
+				}
 
-			// Draw mouse input visuals
-			MouseInput.Draw(spriteBatch);
+			spriteBatch.End();
+
+			/*
+			 *	Draw Krypton lighting
+			 */
+			this.KryptonEngine.Draw(gameTime);
+
+			/*
+			 *	Draw HUD elements
+			 */
+			spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, null, null, null, Camera.Transform);
+
+				// Draw mouse input visuals
+				MouseInput.Draw(spriteBatch);
 
 			spriteBatch.End();
 

DepthsBelow/DepthsBelow/DepthsBelow.csproj

@@ -146,6 +146,10 @@
       <Project>{CD3F949D-54AA-4D38-99DB-92905A375D84}</Project>
       <Name>AStar</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\Krypton v2.0\Krypton\Krypton.csproj">
+      <Project>{B1BFCB2A-C001-4DAC-BA7D-B68BF28757F3}</Project>
+      <Name>Krypton</Name>
+    </ProjectReference>
     <ProjectReference Include="..\DepthsBelowContent\DepthsBelowContent.contentproj">
       <Name>DepthsBelowContent %28Content%29</Name>
       <XnaReferenceType>Content</XnaReferenceType>

DepthsBelow/DepthsBelow/Map.cs

@@ -59,27 +59,50 @@ namespace DepthsBelow
 
 		}
 
-		public void ParseObjects(Core core)
+		public void Initialize(Core core, Krypton.KryptonEngine kryptonEngine)
 		{
 			foreach (var layer in Layers)
 			{
 				var objectLayer = layer as MapObjectLayer;
-
-				if (objectLayer == null)
-					continue;
-
-				foreach (var mapObject in objectLayer.Objects)
+				if (objectLayer != null)
 				{
-					if (mapObject.Type == "SquadStart")
+					// Parse objects
+					foreach (var mapObject in objectLayer.Objects)
 					{
-						var soldier = new Soldier(core);
-						// HACK: For some reason, the tile object coordinates are offset by one tile on the Y-axis in the Tiled map file (https://github.com/bjorn/tiled/issues/91)
-						var mapObjectPos = new Vector2(mapObject.Bounds.X, mapObject.Bounds.Y - Grid.TileSize);
-						var mapObjectGridPos = Grid.WorldToGrid(mapObjectPos);
-						soldier.X = mapObjectGridPos.X;
-						soldier.Y = mapObjectGridPos.Y;
-	
-						core.Squad.Add(soldier);
+						if (mapObject.Type == "SquadStart")
+						{
+							var soldier = new Soldier(core);
+							// HACK: For some reason, the tile object coordinates are offset by one tile on the Y-axis in the Tiled map file (https://github.com/bjorn/tiled/issues/91)
+							var mapObjectPos = new Vector2(mapObject.Bounds.X, mapObject.Bounds.Y - Grid.TileSize);
+							var mapObjectGridPos = Grid.WorldToGrid(mapObjectPos);
+							soldier.X = mapObjectGridPos.X;
+							soldier.Y = mapObjectGridPos.Y;
+
+							core.Squad.Add(soldier);
+						}
+					}
+				}
+
+				var tileLayer = layer as MapTileLayer;
+				if (tileLayer != null)
+				{
+					// Prepare collision hulls for lighting engine
+					if (tileLayer.Name == "Collision")
+					{
+						for (int y = 0; y < tileLayer.Height; y++)
+						{
+							for (int x = 0; x < tileLayer.Width; x++)
+							{
+								MapTile mapTile = tileLayer.Tiles[y * layer.Width + x];
+								if (mapTile != null && mapTile.LocalId != 0)
+								{
+									var hull = Krypton.ShadowHull.CreateRectangle(new Vector2(TileWidth, TileHeight));
+									hull.Position.X = x * TileWidth + TileWidth/2;
+									hull.Position.Y = y * TileHeight + TileWidth / 2;
+									kryptonEngine.Hulls.Add(hull);
+								}
+							}
+						}
 					}
 				}
 			}

DepthsBelow/DepthsBelow/MouseInput.cs

@@ -38,6 +38,10 @@ namespace DepthsBelow
 
 		public void Update(GameTime gameTime)
 		{
+			// Only capture input if the game window is in focus
+			if (!core.IsActive)
+				return;
+
 			MouseState ms = Mouse.GetState();
 			Vector2 mouseWorldPos = core.Camera.ScreenToWorld(new Vector2(ms.X, ms.Y));
 			KeyboardState ks = Keyboard.GetState();

DepthsBelow/DepthsBelowContent/DepthsBelowContent.contentproj

@@ -99,6 +99,13 @@
       <Processor>TextureProcessor</Processor>
     </Compile>
   </ItemGroup>
+  <ItemGroup>
+    <Compile Include="KryptonEffect.fx">
+      <Name>KryptonEffect</Name>
+      <Importer>EffectImporter</Importer>
+      <Processor>EffectProcessor</Processor>
+    </Compile>
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\XNA Game Studio\$(XnaFrameworkVersion)\Microsoft.Xna.GameStudio.ContentPipeline.targets" />
   <!--  To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

DepthsBelow/DepthsBelowContent/KryptonEffect.fx

@@ -0,0 +1,478 @@
+// ------------------------------------------------------------------------------------------------ //
+// ----- Copyright 2011 Christopher Harris --------------------- http://krypton.codeplex.com/ ----- //
+// ----------------------------------------------------------------- mailto:xixonia@gmail.com ----- //
+// ------------------------------------------------------------------------------------------------ //
+
+// ------------------------------------------------------------------------------------------------ //
+// ----- Parameters ------------------------------------------------------------------------------- //
+
+float4x4 Matrix;
+
+texture Texture0;
+texture Texture1;
+float2	LightPosition;
+float	LightIntensityFactor = 1;
+
+float	ShadowStrech = 1000000;
+
+float2 TexelBias;
+
+float4 AmbientColor;
+
+float Bluriness = 0.5f;
+float BlurFactorU = 0;
+float BlurFactorV = 0;
+
+// ------------------------------------------------------------------------------------------------ //
+// ----- Samplers --------------------------------------------------------------------------------- //
+
+sampler2D tex0 = sampler_state
+{
+	Texture = <Texture0>;
+	AddressU = Clamp;
+	AddressV = Clamp;
+};
+
+sampler2D tex1 = sampler_state
+{
+	Texture = <Texture1>;
+	AddressU = Clamp;
+	AddressV = Clamp;
+};
+
+// ------------------------------------------------------------------------------------------------ //
+// ----- Structures ------------------------------------------------------------------------------- //
+
+struct ShadowHullVertex
+{
+	float4 Position : POSITION0;
+	float2 Normal	: NORMAL0;
+	float4 Color	: COLOR0;
+};
+
+struct VertexPositionColor
+{
+	float4 Position : POSITION0;
+	float4 Color	: COLOR0;
+};
+
+struct VertexPositionNormalTexture
+{
+	float4 Position	: POSITION0;
+	float4 Normal	: NORMAL0;
+	float2 TexCoord	: TEXCOORD0;
+};
+
+struct VertexPositionColorTexture
+{
+	float4 Position	: POSITION0;
+	float4 Color	: COLOR0;
+	float2 TexCoord	: TEXCOORD0;
+};
+
+struct VertexPositionTexture
+{
+	float4 Position	: POSITION0;
+	float2 TexCoord : TEXCOORD0;
+};
+
+// ------------------------------------------------------------------------------------------------ //
+// ----- Techniques ------------------------------------------------------------------------------- //
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: TextureToTarget ---------------------------------------------------------------
+
+VertexPositionTexture VS_ScreenCopy(VertexPositionTexture input)
+{
+	VertexPositionTexture output;
+	
+	output.Position = input.Position;
+	output.TexCoord = input.TexCoord;
+	
+	return input;
+};
+
+float4 PS_ScreenCopy(VertexPositionTexture input) : COLOR0
+{
+	return tex2D(tex0, input.TexCoord + TexelBias);
+};
+
+technique TextureToTarget_Add
+{
+	pass Pass1
+	{
+		StencilEnable = False;
+
+		BlendOp = Add;
+		SrcBlend = One;
+		DestBlend = One;
+
+		AlphaBlendEnable = True;
+		
+		CullMode = CCW;
+
+		VertexShader = compile vs_2_0 VS_ScreenCopy();
+		PixelShader = compile ps_2_0 PS_ScreenCopy();
+	}
+};
+
+technique TextureToTarget_Multiply
+{
+	pass Pass1
+	{
+		StencilEnable = False;
+
+		BlendOp = Add;
+		SrcBlend = Zero;
+		DestBlend = SrcColor;
+
+		AlphaBlendEnable = True;
+		
+		CullMode = CCW;
+
+		VertexShader = compile vs_2_0 VS_ScreenCopy();
+		PixelShader = compile ps_2_0 PS_ScreenCopy();
+	}
+};
+
+float4 PS_ClearTarget() : COLOR0
+{
+	return float4(0, 0, 0, 1);
+}
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: SimpleTexture -----------------------------------------------------------------
+
+VertexPositionColorTexture VS_SimpleTexture(VertexPositionColorTexture input)
+{
+	VertexPositionColorTexture output;
+
+	output.Position = mul(input.Position, Matrix);
+	output.Color = input.Color;
+	output.TexCoord = input.TexCoord;
+
+	return output;
+};
+
+float4 PS_SimpleTexture(VertexPositionColorTexture input) : COLOR0
+{
+	return tex2D(tex0, input.TexCoord) * input.Color;
+};
+
+float4 PS_LightTexture(VertexPositionColorTexture input) : COLOR0
+{
+	return pow(tex2D(tex0, input.TexCoord) * input.Color, LightIntensityFactor);
+};
+
+technique SimpleTexture
+{
+	pass Pass1
+	{
+		StencilEnable = False;
+
+		VertexShader = compile vs_2_0 VS_SimpleTexture();
+		PixelShader = compile ps_2_0 PS_SimpleTexture();
+	}
+};
+
+technique LightTexture
+{
+	pass Pass1
+	{
+		StencilEnable = False;
+
+		BlendOp = Add;
+		DestBlend = Zero;
+		SrcBlend = SrcAlpha;
+		
+		AlphaBlendEnable = True;
+
+		VertexShader = compile vs_2_0 VS_SimpleTexture();
+		PixelShader = compile ps_2_0 PS_LightTexture();
+	}
+};
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: PointLight_Shadow -------------------------------------------------------------
+
+VertexPositionColor VS_PointLight_Shadow(ShadowHullVertex input)
+{
+    float2 direction = normalize(LightPosition.xy - input.Position.xy);
+    
+    if(dot(input.Normal.xy, direction) < 0)
+    {
+		// Stretch backfacing vertices
+		input.Position.xy -= direction * ShadowStrech;
+    }
+	
+	VertexPositionColor output;
+
+	output.Position = mul(input.Position, Matrix);
+	output.Color = input.Color;
+
+	return output;
+};
+
+float4 PS_PointLight_Shadow(float4 input : COLOR0) : COLOR0
+{
+	return input;
+};
+
+VertexPositionColor VS_Shadow_HullIllumination(ShadowHullVertex input)
+{
+	VertexPositionColor output;
+
+	output.Position = mul(input.Position, Matrix);
+	output.Color = input.Color;
+
+	return output;
+};
+
+float4 PS_Shadow_HullIllumination() : COLOR0
+{
+	return float4(1, 1, 1, 1);
+};
+
+technique PointLight_Shadow
+{
+	pass Shadow
+	{
+		StencilEnable = False;
+
+		AlphaBlendEnable = True;
+
+		BlendOp = RevSubtract;
+		SrcBlend = One;
+		DestBlend = One;
+
+		VertexShader = compile vs_2_0 VS_PointLight_Shadow();
+		PixelShader = compile ps_2_0 PS_PointLight_Shadow();
+	}
+};
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: PointLight_ShadowWithIllumination ---------------------------------------------
+
+technique PointLight_ShadowWithIllumination
+{
+	pass Shadow_Illumination
+	{
+		// This outlines where our hulls are currently, so we don't draw shadows there
+		StencilEnable = True;
+		StencilFunc = Never;
+		StencilFail = Incr;
+
+		AlphaBlendEnable = False;
+
+		VertexShader = compile vs_2_0 VS_Shadow_HullIllumination();
+		PixelShader = compile ps_2_0 PS_Shadow_HullIllumination();
+	}
+
+	pass Shadow
+	{
+		// Only draw where the Stencil hasn't touched
+		StencilEnable = True;
+		StencilFunc = Equal;
+		StencilRef = 0;
+		StencilFail = Incr;
+
+		AlphaBlendEnable = True;
+
+		BlendOp = RevSubtract;
+		SrcBlend = One;
+		DestBlend = One;
+
+		VertexShader = compile vs_2_0 VS_PointLight_Shadow();
+		PixelShader = compile ps_2_0 PS_PointLight_Shadow();
+	}
+	
+};
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: PointLight_ShadowWithOcclusion ------------------------------------------------
+
+technique PointLight_ShadowWithOcclusion
+{
+	pass Shadow_HullStencil
+	{
+		// This outlines where our hulls are currently, so we don't draw shadows there, unless the hull is occluded
+		StencilEnable = True;
+		StencilFunc = Never;
+		StencilFail = Incr;
+
+		VertexShader = compile vs_2_0 VS_Shadow_HullIllumination();
+		PixelShader = compile ps_2_0 PS_Shadow_HullIllumination();
+	}
+
+	pass Shadow
+	{
+		// This allows us to draw shadows on hulls behind other hulls
+		StencilEnable = True;
+		StencilFunc = NotEqual;
+		StencilRef = 1;
+		StencilPass = Keep;
+		StencilFail = Incr;
+
+		AlphaBlendEnable = True;
+
+		BlendOp = RevSubtract;
+		SrcBlend = One;
+		DestBlend = One;
+
+		VertexShader = compile vs_2_0 VS_PointLight_Shadow();
+		PixelShader = compile ps_2_0 PS_PointLight_Shadow();
+	}
+};
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: DebugDraw ---------------------------------------------------------------------
+
+technique DebugDraw
+{
+	pass Solid
+	{
+		StencilEnable = False;
+		AlphaBlendEnable = False;
+
+		VertexShader = compile vs_2_0 VS_Shadow_HullIllumination();
+		PixelShader = compile ps_2_0 PS_Shadow_HullIllumination();
+	}
+};
+
+// ------------------------------------------------------------------------------------------------
+// ----- Technique: Blur --------------------------------------------------------------------------
+
+float4 PS_BlurH(in float2 texCoord : TEXCOORD0) : COLOR0
+{
+	float blurFactor = Bluriness * BlurFactorU / 4.0f;
+
+	return
+		tex2D(tex0, float2(texCoord.x - blurFactor * 4,	texCoord.y)	+ TexelBias) * 0.05f +
+		tex2D(tex0, float2(texCoord.x - blurFactor * 3,	texCoord.y)	+ TexelBias) * 0.09f +
+		tex2D(tex0, float2(texCoord.x - blurFactor * 2,	texCoord.y)	+ TexelBias) * 0.12f +
+		tex2D(tex0, float2(texCoord.x - blurFactor,		texCoord.y)	+ TexelBias) * 0.15f +
+		tex2D(tex0, float2(texCoord.x,					texCoord.y)	+ TexelBias) * 0.18f +
+		tex2D(tex0, float2(texCoord.x + blurFactor,		texCoord.y)	+ TexelBias) * 0.15f +
+		tex2D(tex0, float2(texCoord.x + blurFactor * 2,	texCoord.y)	+ TexelBias) * 0.12f +
+		tex2D(tex0, float2(texCoord.x + blurFactor * 3,	texCoord.y)	+ TexelBias) * 0.09f +
+		tex2D(tex0, float2(texCoord.x + blurFactor * 4,	texCoord.y)	+ TexelBias) * 0.05f;
+}
+
+float4 PS_BlurV(in float2 texCoord : TEXCOORD0) : COLOR0
+{
+	float blurFactor = Bluriness * BlurFactorV / 4.0f;
+
+	return
+		tex2D(tex0, float2(texCoord.x, texCoord.y - blurFactor * 4)	+ TexelBias) * 0.05f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y - blurFactor * 3)	+ TexelBias) * 0.09f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y - blurFactor * 2)	+ TexelBias) * 0.12f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y - blurFactor)		+ TexelBias) * 0.15f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y)					+ TexelBias) * 0.18f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y + blurFactor)		+ TexelBias) * 0.15f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y + blurFactor * 2)	+ TexelBias) * 0.12f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y + blurFactor * 3)	+ TexelBias) * 0.09f +
+		tex2D(tex0, float2(texCoord.x, texCoord.y + blurFactor * 4)	+ TexelBias) * 0.05f;
+}
+
+technique Blur
+{
+    pass HorizontalBlur
+    {
+		ScissorTestEnable = False;
+		StencilEnable = False;
+		AlphaBlendEnable = False;
+
+		CullMode = CCW;
+
+		VertexShader = compile vs_2_0 VS_ScreenCopy();
+        PixelShader = compile ps_2_0 PS_BlurH();
+    }
+    
+    pass VerticalBlur
+    {
+		ScissorTestEnable = False;
+		StencilEnable = False;
+		AlphaBlendEnable = False;
+
+		CullMode = CCW;
+
+		VertexShader = compile vs_2_0 VS_ScreenCopy();
+        PixelShader = compile ps_2_0 PS_BlurV();
+    }
+}
+
+
+technique PointLight_Shadow_Fast
+{
+	pass ShadowStencil
+	{
+		StencilEnable = True;
+		StencilFunc = Always;
+		StencilPass = Incr;
+
+		ScissorTestEnable = True;
+
+		AlphaBlendEnable = True;
+		BlendOp = Add;
+		SrcBlend = DestAlpha;
+		DestBlend = Zero;
+
+		ColorWriteEnable = Alpha;
+
+		VertexShader = compile vs_2_0 VS_PointLight_Shadow();
+		PixelShader = compile ps_2_0 PS_PointLight_Shadow();
+	}
+
+	pass Light
+	{
+		StencilEnable = True;
+		StencilFunc = Equal;
+		StencilRef = 1;
+		StencilPass = Keep;
+
+		ScissorTestEnable = True;
+
+		AlphaBlendEnable = True;
+		BlendOp = Add;
+		SrcBlend = One;
+		DestBlend = One;
+		
+		ColorWriteEnable = Red | Green | Blue;
+
+		VertexShader = compile vs_2_0 VS_SimpleTexture();
+		PixelShader = compile ps_2_0 PS_LightTexture();
+	}
+
+	pass LightAlpha
+	{
+		StencilEnable = True;
+		StencilFunc = NotEqual;
+		StencilRef = 1;
+		StencilPass = Keep;
+
+		ScissorTestEnable = True;
+
+		AlphaBlendEnable = True;
+		BlendOp = Add;
+		SrcBlend = DestAlpha;
+		DestBlend = One;
+
+		VertexShader = compile vs_2_0 VS_SimpleTexture();
+		PixelShader = compile ps_2_0 PS_LightTexture();
+	}
+
+	pass ClearAlpha
+	{
+		StencilEnable = False;
+
+		AlphaBlendEnable = False;
+
+		CullMode = CCW;
+		
+		ColorWriteEnable = Alpha;
+
+		VertexShader = compile vs_2_0 VS_ScreenCopy();
+		PixelShader = compile ps_2_0 PS_ClearTarget();
+	}
+
+};