Implement sun & moon

TrueCraft.Client/Modules/ChunkModule.cs

@@ -46,16 +46,17 @@ namespace TrueCraft.Client.Modules
             OpaqueEffect.TextureEnabled = true;
             OpaqueEffect.Texture = Game.TextureMapper.GetTexture("terrain.png");
             OpaqueEffect.FogEnabled = true;
-            OpaqueEffect.FogStart = 512f;
-            OpaqueEffect.FogEnd = 1000f;
-            OpaqueEffect.FogColor = Color.CornflowerBlue.ToVector3();
+            OpaqueEffect.FogStart = 0;
+            OpaqueEffect.FogEnd = Game.Camera.Frustum.Far.D * 0.8f;
             OpaqueEffect.VertexColorEnabled = true;
+            OpaqueEffect.LightingEnabled = true;
 
             TransparentEffect = new AlphaTestEffect(Game.GraphicsDevice);
             TransparentEffect.AlphaFunction = CompareFunction.Greater;
             TransparentEffect.ReferenceAlpha = 127;
             TransparentEffect.Texture = Game.TextureMapper.GetTexture("terrain.png");
             TransparentEffect.VertexColorEnabled = true;
+            OpaqueEffect.LightingEnabled = true;
 
             ChunkMeshes = new List<ChunkMesh>();
             IncomingChunks = new ConcurrentBag<Mesh>();
@@ -164,8 +165,11 @@ namespace TrueCraft.Client.Modules
 
         public void Draw(GameTime gameTime)
         {
+            OpaqueEffect.FogColor = Game.SkyModule.WorldFogColor.ToVector3();
             Game.Camera.ApplyTo(OpaqueEffect);
             Game.Camera.ApplyTo(TransparentEffect);
+            OpaqueEffect.AmbientLightColor = TransparentEffect.DiffuseColor = Color.White.ToVector3() 
+                * new Microsoft.Xna.Framework.Vector3(0.25f + Game.SkyModule.BrightnessModifier);
 
             int chunks = 0;
             Game.GraphicsDevice.DepthStencilState = DepthStencilState.Default;

TrueCraft.Client/Modules/SkyModule.cs

@@ -0,0 +1,233 @@
+using Microsoft.Xna.Framework;
+using System;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace TrueCraft.Client.Modules
+{
+    public class SkyModule : IGraphicalModule
+    {
+        // https://github.com/SirCmpwn/TrueCraft/wiki/Sky
+
+        private TrueCraftGame Game { get; set; }
+        private BasicEffect SkyPlaneEffect { get; set; }
+        private BasicEffect CelestialPlaneEffect { get; set; }
+        private VertexBuffer SkyPlane { get; set; }
+        private VertexBuffer CelestialPlane { get; set; }
+
+        public SkyModule(TrueCraftGame game)
+        {
+            Game = game;
+            CelestialPlaneEffect = new BasicEffect(Game.GraphicsDevice);
+            CelestialPlaneEffect.TextureEnabled = true;
+
+            SkyPlaneEffect = new BasicEffect(Game.GraphicsDevice);
+            SkyPlaneEffect.VertexColorEnabled = false;
+            SkyPlaneEffect.FogEnabled = true;
+            SkyPlaneEffect.FogStart = 0;
+            SkyPlaneEffect.FogEnd = 64 * 0.8f;
+            SkyPlaneEffect.LightingEnabled = true;
+            var plane = new[]
+            {
+                new VertexPositionColor(new Vector3(-64, 0, -64), Color.White),
+                new VertexPositionColor(new Vector3(64, 0, -64), Color.White),
+                new VertexPositionColor(new Vector3(-64, 0, 64), Color.White),
+
+                new VertexPositionColor(new Vector3(64, 0, -64), Color.White),
+                new VertexPositionColor(new Vector3(64, 0, 64), Color.White),
+                new VertexPositionColor(new Vector3(-64, 0, 64), Color.White)
+            };
+            SkyPlane = new VertexBuffer(Game.GraphicsDevice, VertexPositionColor.VertexDeclaration,
+                plane.Length, BufferUsage.WriteOnly);
+            SkyPlane.SetData<VertexPositionColor>(plane);
+            var celestialPlane = new[]
+            {
+                new VertexPositionTexture(new Vector3(-60, 0, -60), new Vector2(0, 0)),
+                new VertexPositionTexture(new Vector3(60, 0, -60), new Vector2(1, 0)),
+                new VertexPositionTexture(new Vector3(-60, 0, 60), new Vector2(0, 1)),
+
+                new VertexPositionTexture(new Vector3(60, 0, -60), new Vector2(1, 0)),
+                new VertexPositionTexture(new Vector3(60, 0, 60), new Vector2(1, 1)),
+                new VertexPositionTexture(new Vector3(-60, 0, 60), new Vector2(0, 1))
+            };
+            CelestialPlane = new VertexBuffer(Game.GraphicsDevice, VertexPositionTexture.VertexDeclaration,
+                celestialPlane.Length, BufferUsage.WriteOnly);
+            CelestialPlane.SetData<VertexPositionTexture>(celestialPlane);
+        }
+
+        private float CelestialAngle
+        {
+            get
+            {
+                float x = (Game.Client.World.Time % 24000f) / 24000f - 0.25f;
+                if (x < 0) x = 0;
+                if (x > 1) x = 1;
+                return x + ((1 - ((float)Math.Cos(x * MathHelper.Pi) + 1) / 2) - x) / 3;
+            }
+        }
+
+        public static Color HSL2RGB(float h, float sl, float l)
+        {
+            // Thanks http://www.java2s.com/Code/CSharp/2D-Graphics/HSLtoRGBconversion.htm
+            float v, r, g, b;
+            r = g = b = l;   // default to gray
+            v = (l <= 0.5f) ? (l * (1.0f + sl)) : (l + sl - l * sl);
+            if (v > 0)
+            {
+                int sextant;
+                float m, sv, fract, vsf, mid1, mid2;
+                m = l + l - v;
+                sv = (v - m) / v;
+                h *= 6.0f;
+                sextant = (int)h;
+                fract = h - sextant;
+                vsf = v * sv * fract;
+                mid1 = m + vsf;
+                mid2 = v - vsf;
+                switch (sextant)
+                {
+                    case 0:
+                        r = v; g = mid1; b = m;
+                        break;
+                    case 1:
+                        r = mid2; g = v; b = m;
+                        break;
+                    case 2:
+                        r = m; g = v; b = mid1;
+                        break;
+                    case 3:
+                        r = m; g = mid2; b = v;
+                        break;
+                    case 4:
+                        r = mid1; g = m; b = v;
+                        break;
+                    case 5:
+                        r = v; g = m; b = mid2;
+                        break;
+                }
+            }
+            return new Color(r, g, b);
+        }
+
+        private Color BaseColor
+        {
+            get
+            {
+                // Note: temperature comes from the current biome, but we have to
+                // do biomes differently than Minecraft so we'll un-hardcode this later.
+                const float temp = 0.8f / 3;
+                return HSL2RGB(0.6222222f - temp * 0.05f, 0.5f + temp * 0.1f, BrightnessModifier);
+            }
+        }
+
+        public float BrightnessModifier
+        {
+            get
+            {
+                var mod = (float)Math.Cos(CelestialAngle * MathHelper.TwoPi) * 2 + 0.5f;
+                if (mod < 0) mod = 0;
+                if (mod > 1) mod = 1;
+                return mod;
+            }
+        }
+
+        public Color WorldSkyColor
+        {
+            get
+            {
+                return BaseColor;
+            }
+        }
+
+        public Color WorldFogColor
+        {
+            get
+            {
+                float y = (float)Math.Cos(CelestialAngle * MathHelper.TwoPi) * 2 + 0.5f;
+                return new Color(0.7529412f * y * 0.94f + 0.06f,
+                    0.8470588f * y * 0.94f + 0.06f, 1.0f * y * 0.91f + 0.09f);
+            }
+        }
+
+        public Color AtmosphereColor
+        {
+            get
+            {
+                const float blendFactor = 0.29f; // TODO: Compute based on view distance
+                Func<float, float, float> blend = (float source, float destination) =>
+                    destination + (source - destination) * blendFactor;
+                var fog = WorldFogColor.ToVector3();
+                var sky = WorldSkyColor.ToVector3();
+                var color = new Vector3(blend(sky.X, fog.X), blend(sky.Y, fog.Y), blend(sky.Z, fog.Z));
+                // TODO: more stuff
+                return new Color(color);
+            }
+        }
+
+        public void Draw(GameTime gameTime)
+        {
+            Game.GraphicsDevice.Clear(AtmosphereColor);
+            Game.GraphicsDevice.SetVertexBuffer(SkyPlane);
+
+            var position = Game.Camera.Position;
+            var yaw = Game.Camera.Yaw;
+            Game.Camera.Position = TrueCraft.API.Vector3.Zero;
+            Game.Camera.Yaw = 0;
+            Game.Camera.ApplyTo(SkyPlaneEffect);
+            Game.Camera.Yaw = yaw;
+            Game.Camera.ApplyTo(CelestialPlaneEffect);
+            Game.Camera.Position = position;
+            // Sky
+            SkyPlaneEffect.FogColor = AtmosphereColor.ToVector3();
+            SkyPlaneEffect.World = Matrix.CreateRotationX(MathHelper.Pi)
+                * Matrix.CreateTranslation(0, 100, 0)
+                * Matrix.CreateRotationX(MathHelper.TwoPi * CelestialAngle);
+            SkyPlaneEffect.AmbientLightColor = WorldSkyColor.ToVector3(); foreach (var pass in SkyPlaneEffect.CurrentTechnique.Passes)
+            {
+                pass.Apply();
+                SkyPlaneEffect.GraphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
+            }
+
+            // Sun
+            Game.GraphicsDevice.SetVertexBuffer(CelestialPlane);
+            var backup = Game.GraphicsDevice.BlendState;
+            Game.GraphicsDevice.BlendState = BlendState.Additive;
+            Game.GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
+            CelestialPlaneEffect.Texture = Game.TextureMapper.GetTexture("terrain/sun.png");
+            CelestialPlaneEffect.World = Matrix.CreateRotationX(MathHelper.Pi)
+                * Matrix.CreateTranslation(0, 100, 0)
+                * Matrix.CreateRotationX(MathHelper.TwoPi * CelestialAngle);
+            foreach (var pass in CelestialPlaneEffect.CurrentTechnique.Passes)
+            {
+                pass.Apply();
+                CelestialPlaneEffect.GraphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
+            }
+            // Moon
+            CelestialPlaneEffect.Texture = Game.TextureMapper.GetTexture("terrain/moon.png");
+            CelestialPlaneEffect.World = Matrix.CreateTranslation(0, -100, 0)
+                * Matrix.CreateRotationX(MathHelper.TwoPi * CelestialAngle);
+            foreach (var pass in CelestialPlaneEffect.CurrentTechnique.Passes)
+            {
+                pass.Apply();
+                CelestialPlaneEffect.GraphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
+            }
+            Game.GraphicsDevice.BlendState = backup;
+            Game.GraphicsDevice.DepthStencilState = DepthStencilState.Default;
+
+            // Void
+            Game.GraphicsDevice.SetVertexBuffer(SkyPlane);
+            SkyPlaneEffect.World = Matrix.CreateTranslation(0, -16, 0);
+            SkyPlaneEffect.AmbientLightColor = WorldSkyColor.ToVector3()
+                * new Vector3(0.2f, 0.2f, 0.6f)
+                + new Vector3(0.04f, 0.04f, 0.1f);
+            foreach (var pass in SkyPlaneEffect.CurrentTechnique.Passes)
+            {
+                pass.Apply();
+                SkyPlaneEffect.GraphicsDevice.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
+            }
+        }
+
+        public void Update(GameTime gameTime)
+        {
+        }
+    }
+}

TrueCraft.Client/ReadOnlyWorld.cs

@@ -15,6 +15,8 @@ namespace TrueCraft.Client
 
         internal World World { get; set; }
 
+        public long Time { get { return World.Time; } }
+
         internal ReadOnlyWorld()
         {
             World = new World("default");

TrueCraft.Client/Rendering/TextureMapper.cs

@@ -36,6 +36,8 @@ namespace TrueCraft.Client.Rendering
             Defaults.Add("gui/crafting.png", new PngReader().Read(File.OpenRead("Content/crafting.png"), graphicsDevice));
             Defaults.Add("gui/furnace.png", new PngReader().Read(File.OpenRead("Content/furnace.png"), graphicsDevice));
             Defaults.Add("gui/inventory.png", new PngReader().Read(File.OpenRead("Content/inventory.png"), graphicsDevice));
+            Defaults.Add("terrain/moon.png", new PngReader().Read(File.OpenRead("Content/moon.png"), graphicsDevice));
+            Defaults.Add("terrain/sun.png", new PngReader().Read(File.OpenRead("Content/sun.png"), graphicsDevice));
         }
 
         /// <summary>

TrueCraft.Client/TrueCraft.Client.csproj

@@ -151,6 +151,7 @@
     <Compile Include="AudioManager.cs" />
     <Compile Include="Modules\ChatModule.cs" />
     <Compile Include="Modules\WindowModule.cs" />
+    <Compile Include="Modules\SkyModule.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
@@ -379,6 +380,12 @@
       <Link>OpenTK.dll.config</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="Content\moon.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="Content\sun.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
   <ItemGroup />
 </Project>

TrueCraft.Client/TrueCraftGame.cs

@@ -42,6 +42,7 @@ namespace TrueCraft.Client
         public AudioManager Audio { get; set; }
         public Texture2D White1x1 { get; set; }
         public PlayerControlModule ControlModule { get; set; }
+        public SkyModule SkyModule { get; set; }
 
         private List<IGameplayModule> InputModules { get; set; }
         private List<IGameplayModule> GraphicalModules { get; set; }
@@ -121,18 +122,23 @@ namespace TrueCraft.Client
 
             base.Initialize(); // (calls LoadContent)
 
+            Camera = new Camera(GraphicsDevice.Viewport.AspectRatio, 70.0f, 0.1f, 1000.0f);
+            UpdateCamera();
+
             White1x1 = new Texture2D(GraphicsDevice, 1, 1);
             White1x1.SetData<Color>(new[] { Color.White });
 
             Audio = new AudioManager();
             Audio.LoadDefaultPacks(Content);
 
+            SkyModule = new SkyModule(this);
             ChunkModule = new ChunkModule(this);
             DebugInfoModule = new DebugInfoModule(this, Pixel);
             ChatModule = new ChatModule(this, Pixel);
             var hud = new HUDModule(this, Pixel);
             var windowModule = new WindowModule(this, Pixel);
 
+            GraphicalModules.Add(SkyModule);
             GraphicalModules.Add(ChunkModule);
             GraphicalModules.Add(new HighlightModule(this));
             GraphicalModules.Add(hud);
@@ -161,9 +167,6 @@ namespace TrueCraft.Client
             var centerY = GraphicsDevice.Viewport.Height / 2;
             Mouse.SetPosition(centerX, centerY);
 
-            Camera = new Camera(GraphicsDevice.Viewport.AspectRatio, 70.0f, 0.1f, 1000.0f);
-            UpdateCamera();
-
             MouseComponent.Scroll += OnMouseComponentScroll;
             MouseComponent.Move += OnMouseComponentMove;
             MouseComponent.ButtonDown += OnMouseComponentButtonDown;
@@ -397,7 +400,6 @@ namespace TrueCraft.Client
             GraphicsDevice.SetRenderTarget(RenderTarget);
             GraphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
 
-            Graphics.GraphicsDevice.Clear(Color.CornflowerBlue);
             GraphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
             GraphicsDevice.SamplerStates[1] = SamplerState.PointClamp;