Implemented road & road mesh generator.

Game/Assembly-CSharp-vs.csproj

@@ -66,6 +66,7 @@
      <Compile Include="Assets\Scripts\Noise\NoiseGenerator.cs" />
      <Compile Include="Assets\Scripts\Noise\PerlinNoiseGenerator.cs" />
      <Compile Include="Assets\Scripts\Unity\InitializeScript.cs" />
+     <Compile Include="Assets\Scripts\Unity\RoadMeshGenerator.cs" />
      <Compile Include="Assets\Scripts\Unity\TerrainGeneratorScript.cs" />
      <Compile Include="Assets\Scripts\Utils\Algorithms.cs" />
      <Compile Include="Assets\Scripts\Utils\Algorithms\GridTraverseAlgorithm.cs" />

Game/Assembly-CSharp.csproj

@@ -66,6 +66,7 @@
      <Compile Include="Assets\Scripts\Noise\NoiseGenerator.cs" />
      <Compile Include="Assets\Scripts\Noise\PerlinNoiseGenerator.cs" />
      <Compile Include="Assets\Scripts\Unity\InitializeScript.cs" />
+     <Compile Include="Assets\Scripts\Unity\RoadMeshGenerator.cs" />
      <Compile Include="Assets\Scripts\Unity\TerrainGeneratorScript.cs" />
      <Compile Include="Assets\Scripts\Utils\Algorithms.cs" />
      <Compile Include="Assets\Scripts\Utils\Algorithms\GridTraverseAlgorithm.cs" />

Game/Assets/Data/Biomes/Mountain.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" ?> 
 <biome>
 	<name>Mountain</name>
-	<height>500</height>
+	<height>400</height>
 	<moisture min=".1" max=".3"/>
 	<vegetationDensity min=".5" max=".9" />
   <textures>

Game/Assets/Data/Materials.meta

@@ -0,0 +1,9 @@
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+folderAsset: yes
+timeCreated: 1433236765
+licenseType: Free
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+  assetBundleName: 
+  assetBundleVariant: 

Game/Assets/Data/Materials/sidewalk.mat.meta

@@ -0,0 +1,8 @@
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+timeCreated: 1433236871
+licenseType: Free
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Game/Assets/Data/Materials/skybox.mat.meta

@@ -0,0 +1,8 @@
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+timeCreated: 1433257206
+licenseType: Free
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+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Game/Assets/Data/Materials/street.mat.meta

@@ -0,0 +1,8 @@
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+timeCreated: 1433236770
+licenseType: Free
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+  assetBundleName: 
+  assetBundleVariant: 

Game/Assets/Data/Textures/sidewalk.jpg.meta

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+    mipMapFadeDistanceEnd: 3
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+  cubemapConvolutionExponent: 1.5
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+  maxTextureSize: 2048
+  textureSettings:
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+  nPOTScale: 1
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+  rGBM: 0
+  compressionQuality: 50
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+  spriteExtrude: 1
+  spriteMeshType: 1
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+  buildTargetSettings: []
+  spriteSheet:
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+  spritePackingTag: 
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Game/Assets/Data/Textures/street.gif.meta

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+timeCreated: 1433235809
+licenseType: Free
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+  fileIDToRecycleName: {}
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+  isReadable: 0
+  grayScaleToAlpha: 0
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+  cubemapConvolution: 0
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+  cubemapConvolutionExponent: 1.5
+  seamlessCubemap: 0
+  textureFormat: -1
+  maxTextureSize: 2048
+  textureSettings:
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+    mipBias: -1
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+  buildTargetSettings: []
+  spriteSheet:
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+  spritePackingTag: 
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Game/Assets/Scripts/Generator/RoadGenerator.cs

@@ -55,7 +55,7 @@ namespace TransportGame.Generator
         const float DefaultBranchProbability = 0.2f;
         const float DefaultSegmentLength = 24;
         const float SteepnessLimit = 10;
-        const float SlopeLimit = (float)Math.PI / 6;
+        const float SlopeLimit = (float)Math.PI / 7;
         const float RoadSegmentAngleLimit = (float)Math.PI / 4;
         const float RoadSnapDistance = 19;
         const float MinNodeDistance = 12;
@@ -154,7 +154,7 @@ namespace TransportGame.Generator
         private IEnumerable<RoadGeneratorSegment> GlobalGoals(RoadSegment segment)
         {
             Vector2 prevPos = segment.Terminal2.Position;
-            Vector2 dir = (segment.Terminal2.Position - segment.Terminal1.Position).Normalized;
+            Vector2 dir = segment.Direction;
             bool highway = (segment.LanesTo1 >= 3);
             bool highwayBranched = false;
 
@@ -258,18 +258,14 @@ namespace TransportGame.Generator
             }
 
             // Filter & sort the segments by distance
-            segmentIds = segmentIds.Distinct().OrderBy(id =>
-            {
-                var seg = map.RoadNetwork.ArticulationSegments[id];
-                var line = new LineSegment(seg.Terminal1.Position, seg.Terminal2.Position);
-                return LineSegment.Distance(line, segment.Terminal2Pos);
-            });
+            segmentIds = segmentIds.Distinct().OrderBy(id => 
+                LineSegment.Distance(map.RoadNetwork.ArticulationSegments[id].AsLineSegment(), segment.Terminal2Pos));
 
             foreach (var segmentId in segmentIds)
             {
                 var other = map.RoadNetwork.ArticulationSegments[segmentId];
                 var line1 = new LineSegment(segment.Terminal1.Position, segment.Terminal2Pos);
-                var line2 = new LineSegment(other.Terminal1.Position, other.Terminal2.Position);
+                var line2 = other.AsLineSegment();
 
                 Vector2? inters = LineSegment.Intersect(line1, line2);
 
@@ -294,7 +290,7 @@ namespace TransportGame.Generator
                     // Check angle between intersecting segments
                     foreach (var intersSeg in other.Terminal2.ArticulationSegments)
                     {
-                        float cos = Vector2.Dot((line1.P1 - line1.P0).Normalized, (intersSeg.Terminal2.Position - intersSeg.Terminal1.Position).Normalized);
+                        float cos = Vector2.Dot(line1.Direction, intersSeg.Direction);
                         if (Math.Abs(Math.Acos(cos)) < RoadSegmentAngleLimit)
                             return false;
                     }

Game/Assets/Scripts/Model/LineSegment.cs

@@ -43,6 +43,14 @@ namespace TransportGame.Model
             }
         }
 
+        public Vector2 Direction
+        {
+            get
+            {
+                return (P1 - P0).Normalized;
+            }
+        }
+
         public LineSegment(Vector2 p0, Vector2 p1)
             : this()
         {

Game/Assets/Scripts/Model/Road/RoadSegment.cs

@@ -80,6 +80,33 @@ namespace TransportGame.Model.Road
         [XmlAttribute("lanesTo1")]
         public int LanesTo1 { get; set; }
         
+        /// <summary>
+        /// Gets the direction vector of this road segment
+        /// </summary>
+        [XmlIgnore]
+        public Vector2 Direction
+        {
+            get
+            {
+                if (Terminal1Id == -1 || Terminal2Id == -1 || ParentNetwork == null)
+                    return Vector2.Zero;
+
+                return (Terminal2.Position - Terminal1.Position).Normalized;
+            }
+        }
+
+        /// <summary>
+        /// Gets the road segment as a line segment
+        /// </summary>
+        /// <returns></returns>
+        public LineSegment AsLineSegment()
+        {
+            if (Terminal1Id == -1 || Terminal2Id == -1 || ParentNetwork == null)
+                throw new InvalidOperationException("Terminals are not initialized.");
+
+            return new LineSegment(Terminal1.Position, Terminal2.Position);
+        }
+
         /// <summary>
         /// Initializes road segment
         /// </summary>

Game/Assets/Scripts/Model/Vector2.cs

@@ -78,6 +78,22 @@ namespace TransportGame.Model
             }
         }
 
+        /// <summary>
+        /// Gets the normalized vector raised to second power
+        /// </summary>
+        /// <remarks>
+        /// This is less computationally expensive (no need to calculate square root).
+        /// </remarks>
+        /// <returns>Normalized vector</returns>
+        public Vector2 NormalizedSq
+        {
+            get
+            {
+                float len2 = LengthSq;
+                return new Vector2(X * X / len2, Y * Y / len2);
+            }
+        }
+
         /// <summary>
         /// Rotates vector by given number of radians
         /// </summary>
@@ -123,6 +139,16 @@ namespace TransportGame.Model
             return new Vector2(a.X - b.X, a.Y - b.Y);
         }
 
+        /// <summary>
+        /// Negation operator
+        /// </summary>
+        /// <param name="a">Vector</param>
+        /// <returns>Negated vector</returns>
+        public static Vector2 operator -(Vector2 a)
+        {
+            return new Vector2(-a.X, -a.Y);
+        }
+
         /// <summary>
         /// Multiply by constant
         /// </summary>
@@ -188,6 +214,28 @@ namespace TransportGame.Model
             return a.X * b.X + a.Y * b.Y;
         }
 
+        /// <summary>
+        /// Returns the magnitude of the cross product between the two vectors (z considered 0)
+        /// </summary>
+        /// <param name="a">First vector</param>
+        /// <param name="b">Second vector</param>
+        /// <returns>Magnitude of cross product</returns>
+        public static float Cross(Vector2 a, Vector2 b)
+        {
+            return (a.X * b.Y) - (a.Y * b.X);
+        }
+
+        /// <summary>
+        /// Tests if two vectors are colliniar
+        /// </summary>
+        /// <param name="a">a</param>
+        /// <param name="b">b</param>
+        /// <returns>True if vectors are colliniar</returns>
+        public static bool AreColliniar(Vector2 a, Vector2 b)
+        {
+            return Math.Abs(Cross(a, b)) < 1e-12;
+        }
+
         /// <summary>
         /// Gets the vector corresponding with specified angle (in radians)
         /// </summary>

Game/Assets/Scripts/Unity/InitializeScript.cs

@@ -13,12 +13,10 @@ public class InitializeScript : MonoBehaviour
         // Load configuration
         Logger.Info("Loading configuration...");
         ConfigurationManager.LoadConfiguration();
-        Logger.Info("Finished loading configuration.");
 
         // Load biomes
         Logger.Info("Loading biomes...");
         BiomeManager.LoadBiomes();
-        Logger.Info("Finished loading biomes.");
     }
 
     // Update is called once per frame

Game/Assets/Scripts/Unity/RoadMeshGenerator.cs

@@ -0,0 +1,434 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using TransportGame.Model;
+using TransportGame.Model.Road;
+using TransportGame.Utils;
+using UnityEngine;
+using Vector2 = TransportGame.Model.Vector2;
+
+//#define DEBUG_ROAD_MESH_GENERATOR
+
+namespace TransportGame.Unity
+{
+    class RoadMeshGenerator
+    {
+        #region Constants
+        
+        private const float SidewalkWidth = .8f;
+        private const float LaneWidth = 1f;
+
+        private const float RaiseOffset = 0.8f; // Raises road above actual height of terrain
+        private const float SidewalkHeight = 0.1f; // Height of sidewalk
+        private const float SideCoverHeight = 0.1f; // On the sides of the roads, so that we can't see the road from the underside
+
+        #endregion
+
+        #region Private fields
+
+        private Map map;
+
+        private Dictionary<int, Vector2[]> segmentTerminal1Limit = new Dictionary<int, Vector2[]>();
+        private Dictionary<int, Vector2[]> segmentTerminal2Limit = new Dictionary<int, Vector2[]>();
+
+        private GameObject parent = new GameObject("roadNetwork");
+
+        #endregion
+
+        public Material RoadMaterial { get; set; }
+        public Material SidewalkMaterial { get; set; }
+
+        public IEnumerable Generate(Map map)
+        {
+            this.map = map;
+
+            List<int> visitedNodes = new List<int>();
+            List<int> visitedSegments = new List<int>();
+            Queue<RoadNode> queue = new Queue<RoadNode>();
+            queue.Enqueue(map.RoadNetwork.Nodes.First().Value);
+            int i = 0;
+
+            while (queue.Count > 0)
+            {
+                // Pop a node
+                RoadNode node = queue.Dequeue();
+                visitedNodes.Add(node.Id);
+
+                // Generate intersection
+                GenerateIntersection(node);
+
+                // Enqueue
+                foreach (var segment in node.ArticulationSegments)
+                {
+                    // Generate segments linked to node that have been visited
+                    if (visitedNodes.Contains(segment.Terminal1Id) && visitedNodes.Contains(segment.Terminal2Id))
+                    {
+                        if (!visitedSegments.Contains(segment.Id))
+                        {
+                            GenerateSegment(segment);
+                            visitedSegments.Add(segment.Id);
+                        }
+                    }
+                    else
+                    {
+                        if (node == segment.Terminal1)
+                            queue.Enqueue(segment.Terminal2);
+                        else queue.Enqueue(segment.Terminal1);
+                    }
+                }
+
+                // Take a break
+                ++i;
+                if (i % 20 == 0)
+                    yield return null;
+            }
+
+            Logger.Info("Finished generating road mesh.");
+        }
+
+        private int LanesTo(RoadSegment segment, RoadNode terminal)
+        {
+            if (segment.Terminal1 == terminal)
+                return segment.LanesTo1;
+
+            if (segment.Terminal2 == terminal)
+                return segment.LanesTo2;
+
+            return -1;
+        }
+
+        private int LanesFrom(RoadSegment segment, RoadNode terminal)
+        {
+            if (segment.Terminal1 == terminal)
+                return segment.LanesTo2;
+
+            if (segment.Terminal2 == terminal)
+                return segment.LanesTo1;
+
+            return -1;
+        }
+
+        private Vector2 DirectionFrom(RoadSegment segment, RoadNode terminal)
+        {
+            return (segment.Terminal1 == terminal) ? segment.Direction : -segment.Direction;
+        }
+
+        public void GenerateIntersection(RoadNode node)
+        {
+            List<Vector3> vertices = new List<Vector3>();
+            List<UnityEngine.Vector2> uv = new List<UnityEngine.Vector2>();
+            List<int> triangles = new List<int>();
+            int vindex = 0;
+
+            // Helper function
+            Action<Vector2, float> addV = (v, h) => 
+            {
+                Vector3 v3 = new Vector3(v.Y, map.GetHeight((int)node.X, (int)node.Y) + RaiseOffset + h, v.X);
+                UnityEngine.Vector2 v2 = new UnityEngine.Vector2(v.Y / 3 - v3.y, v.X / 3 - v3.y);
+
+                vertices.Add(v3);
+                uv.Add(v2);
+            };
+
+            // Add current node
+            addV(node.Position, 0);
+            vindex += 1;
+
+            // Sort adjacent segments in trigonometric order
+            var segs = node.ArticulationSegments.OrderBy(segment =>
+                {
+                    Vector2 dir = DirectionFrom(segment, node);
+
+                    if (dir.X >= 0 && dir.Y >= 0)       // First quadrant:
+                        return dir.Y;                   // Y coordinate grows from 0 to 1
+
+                    else if (dir.X <= 0 && dir.Y >= 0)  // Second quadrant:
+                        return 1 + Math.Abs(dir.X);     // X goes from 0 to -1
+
+                    else if (dir.X <= 0 && dir.Y <= 0)  // Third quadrant:
+                        return 2 + Math.Abs(dir.Y);     // Y goes from 0 to -1
+
+                    else return 3 + dir.X;              // Fourth quadrant: X grows from 0 to 1
+                }).ToArray();
+
+            Vector2[] sideCrns = new Vector2[segs.Length];
+            Vector2[] strCrns = new Vector2[segs.Length];
+
+            // Holds intersection points for perpendicular on segment that goes through sidewalk corners
+            // 0, 1, 2, 3 - 0 sidewalk, 1 street, 2 street, 3 sidewalk (in trigonometric order). (when first segment)
+            // 4, 5, 6, 7 - the same (when second segment)
+            Vector2[,] p = new Vector2[8, segs.Length]; 
+
+            // Process each pair of segments
+            for (int i = 0; i < segs.Length; ++i)
+            {
+                // Wrap around
+                int j = i + 1;
+                if (j >= segs.Length)
+                    j = 0;
+
+                // Get direction vectors
+                var dir0 = DirectionFrom(segs[i], node);
+                var dir1 = DirectionFrom(segs[j], node);
+                float cross = Vector2.Cross(dir0, dir1);
+
+                // Colliniar vectors
+                if (Math.Abs(cross) < 1e-2)
+                {
+                    var dirP = dir0.RotateDeg(90);
+
+                    strCrns[i] = node.Position + dirP * LanesTo(segs[i], node) * LaneWidth;
+                    sideCrns[i] = strCrns[i] + dirP * SidewalkWidth;
+                }
+
+                // Vectors not colliniar
+                else
+                {
+                    Vector2 off0 = dir0 * ((LanesFrom(segs[j], node) * LaneWidth) / cross);
+                    Vector2 off1 = dir1 * ((LanesTo(segs[i], node) * LaneWidth) / cross);
+                    strCrns[i] = node.Position + off0 + off1;
+                    sideCrns[i] = strCrns[i] + dir0 * (SidewalkWidth / cross) + dir1 * (SidewalkWidth / cross);
+                }
+
+                // Calculate perpendicular vectors from sidewalk corner on first segment
+                Vector2 perp0 = dir0.RotateDeg(-90);
+                p[3, i] = sideCrns[i];
+                p[2, i] = p[3, i] + perp0 * SidewalkWidth;
+                p[1, i] = p[2, i] + perp0 * (segs[i].LanesTo1 + segs[i].LanesTo2) * LaneWidth;
+                p[0, i] = p[1, i] + perp0 * SidewalkWidth;
+
+                // Calculate perpendicular vectors from sidewalk corner on second segment
+                Vector2 perp1 = dir1.RotateDeg(90);
+                p[4, j] = sideCrns[i];
+                p[5, j] = p[4, j] + perp1 * SidewalkWidth;
+                p[6, j] = p[5, j] + perp1 * (segs[j].LanesTo1 + segs[j].LanesTo2) * LaneWidth;
+                p[7, j] = p[6, j] + perp1 * SidewalkWidth;
+            }
+
+            if (segs.Length == 1)
+            {
+                var dir = DirectionFrom(segs[0], node);
+                Vector2 perp = dir.RotateDeg(-90);
+                Vector2[] end = new[] { 
+                    node.Position + perp * (LanesFrom(segs[0], node) * LaneWidth + SidewalkWidth),
+                    node.Position + perp * (LanesFrom(segs[0], node) * LaneWidth),
+                    node.Position - perp * (LanesTo(segs[0], node) * LaneWidth),
+                    node.Position - perp * (LanesTo(segs[0], node) * LaneWidth + SidewalkWidth)
+                };
+
+                if (segs[0].Terminal1 == node)
+                {
+                    segmentTerminal1Limit[segs[0].Id] = end;
+                }
+                else
+                {
+                    segmentTerminal2Limit[segs[0].Id] = end;
+                }
+            }
+            else
+            {
+
+                // Now we generate for each segment
+                for (int i = 0; i < segs.Length; i++)
+                {
+                    // Find furthest perpendicular
+                    float dist0 = (p[0, i] - node.Position).LengthSq;
+                    float dist1 = (p[4, i] - node.Position).LengthSq;
+
+                    int furth = (dist0 > dist1) ? 0 : 4;
+                    int cornerLeft = i;
+                    int cornerRight = (i - 1 >= 0) ? i - 1 : segs.Length - 1;
+
+                    // Add to limit dictionaries
+                    if (segs[i].Terminal1 == node)
+                    {
+                        segmentTerminal1Limit[segs[i].Id] = new[] { p[furth, i], p[furth + 1, i], p[furth + 2, i], p[furth + 3, i] };
+                    }
+                    else
+                    {
+                        segmentTerminal2Limit[segs[i].Id] = new[] { p[furth, i], p[furth + 1, i], p[furth + 2, i], p[furth + 3, i] };
+                    }
+
+                    // Build road
+                    // Right side
+                    addV(p[furth, i], SidewalkHeight);                                  // 0 - p0 raised
+                    addV(sideCrns[cornerRight], SidewalkHeight);                        // 1 - side corner raised
+                    addV(sideCrns[cornerRight], SidewalkHeight - SideCoverHeight);      // 2 - side corner cover
+                    addV(p[furth, i], SidewalkHeight - SideCoverHeight);                // 3 - p0 cover
+                    addV(p[furth + 1, i], SidewalkHeight);                              // 4 - p1 raised
+                    addV(strCrns[cornerRight], SidewalkHeight);                         // 5 - street corner raised
+                    addV(strCrns[cornerRight], 0);                                      // 6 - street corner
+                    addV(p[furth + 1, i], 0);                                           // 7 - p1
+
+                    // Left side
+                    addV(p[furth + 2, i], 0);                                           // 8 - p2
+                    addV(strCrns[cornerLeft], 0);                                       // 9 - street corner
+                    addV(strCrns[cornerLeft], SidewalkHeight);                          //10 - street corner raised
+                    addV(p[furth + 2, i], SidewalkHeight);                              //11 - p2 raised
+                    addV(p[furth + 3, i], SidewalkHeight - SideCoverHeight);            //12 - p3 cover
+                    addV(sideCrns[cornerLeft], SidewalkHeight - SideCoverHeight);       //13 - side corner cover
+                    addV(sideCrns[cornerLeft], SidewalkHeight);                         //14 - side corner raised
+                    addV(p[furth + 3, i], SidewalkHeight);                              //15 - p3 raised
+
+                    // Right sidewalk
+                    triangles.AddRange(new[] { vindex, vindex + 1, vindex + 2 });       // sidewalk side cover 0
+                    triangles.AddRange(new[] { vindex, vindex + 2, vindex + 3 });       // sidewalk side cover 1
+                    triangles.AddRange(new[] { vindex, vindex + 4, vindex + 1 });       // sidewalk surface 0
+                    triangles.AddRange(new[] { vindex + 4, vindex + 5, vindex + 1 });   // sidewalk surface 1
+                    triangles.AddRange(new[] { vindex + 4, vindex + 7, vindex + 6 });   // sidewalk road raise 0
+                    triangles.AddRange(new[] { vindex + 4, vindex + 6, vindex + 5 });   // sidewalk road raise 1
+
+                    // Road surface
+                    triangles.AddRange(new[] { vindex + 8, vindex + 6, vindex + 7 });   // road surface 0
+                    triangles.AddRange(new[] { vindex + 8, vindex + 9, vindex + 6 });   // road surface 0
+                    triangles.AddRange(new[] { vindex + 6, vindex + 9, 0 });            // road surface 0
+
+                    // Left sidewalk
+                    triangles.AddRange(new[] { vindex + 11, vindex + 10, vindex + 9 }); // sidewalk road raise 0
+                    triangles.AddRange(new[] { vindex + 11, vindex + 9, vindex + 8 });  // sidewalk road raise 1
+                    triangles.AddRange(new[] { vindex + 11, vindex + 14, vindex + 10 });// sidewalk surface 0
+                    triangles.AddRange(new[] { vindex + 11, vindex + 15, vindex + 14 });// sidewalk surface 1
+                    triangles.AddRange(new[] { vindex + 15, vindex + 12, vindex + 13 });// sidewalk side cover 0
+                    triangles.AddRange(new[] { vindex + 15, vindex + 13, vindex + 14 });// sidewalk side cover 1
+
+                    // update vindex
+                    vindex = vertices.Count;
+                }
+
+                // Construct mesh
+                Mesh mesh = new Mesh();
+                mesh.vertices = vertices.ToArray();
+                mesh.triangles = triangles.ToArray();
+                mesh.uv = uv.ToArray();
+                mesh.RecalculateNormals();
+
+                // Construct game object
+                GameObject inters = new GameObject("intersection" + node.Id);
+                inters.transform.parent = parent.transform;
+
+                MeshFilter meshFilter = inters.AddComponent<MeshFilter>();
+                meshFilter.mesh = mesh;
+
+                MeshRenderer meshRenderer = inters.AddComponent<MeshRenderer>();
+                meshRenderer.materials = new[] { RoadMaterial };
+            }
+
+#if DEBUG_ROAD_MESH_GENERATOR
+            // Debug draw
+            Debug.DrawLine(
+                new Vector3(node.Y, map.GetHeight((int)node.X, (int)node.Y) + 0.5f, node.X),
+                new Vector3(node.Y, map.GetHeight((int)node.X, (int)node.Y) + 1.2f, node.X),
+                Color.white, 10000);
+
+            foreach (var sidewalkCorner in sideCrns)
+                Debug.DrawLine(
+                    new Vector3(sidewalkCorner.Y, map.GetHeight((int)sidewalkCorner.X, (int)sidewalkCorner.Y) + 0.5f, sidewalkCorner.X),
+                    new Vector3(sidewalkCorner.Y, map.GetHeight((int)sidewalkCorner.X, (int)sidewalkCorner.Y) + 1.1f, sidewalkCorner.X),
+                    Color.cyan, 10000);
+
+            foreach (var strCorner in strCrns)
+                Debug.DrawLine(
+                    new Vector3(strCorner.Y, map.GetHeight((int)strCorner.X, (int)strCorner.Y) + 0.5f, strCorner.X),
+                    new Vector3(strCorner.Y, map.GetHeight((int)strCorner.X, (int)strCorner.Y) + 1.1f, strCorner.X),
+                    Color.blue, 10000);
+
+            for (int i = 0; i < segs.Length; i++)
+                for (int j = 0; j < 8; j++)
+                    Debug.DrawLine(
+                        new Vector3(p[j, i].Y, map.GetHeight((int)p[j, i].X, (int)p[j, i].Y) + 0.5f, p[j, i].X),
+                        new Vector3(p[j, i].Y, map.GetHeight((int)p[j, i].X, (int)p[j, i].Y) + 1.0f, p[j, i].X),
+                        Color.green, 10000);
+#endif
+        }
+
+        public void GenerateSegment(RoadSegment s)
+        {
+            List<Vector3> vertices = new List<Vector3>();
+            List<UnityEngine.Vector2> uv = new List<UnityEngine.Vector2>();
+            List<int> triangles = new List<int>();
+
+            // Helper function
+            Action<Vector2, float, int> addV = (v, h, term) =>
+            {
+                if (term == 1)
+                    h += map.GetHeight((int)s.Terminal1.X, (int)s.Terminal1.Y);
+                else
+                    h += map.GetHeight((int)s.Terminal2.X, (int)s.Terminal2.Y);
+
+                Vector3 v3 = new Vector3(v.Y, RaiseOffset + h, v.X);
+                UnityEngine.Vector2 v2 = new UnityEngine.Vector2(v.Y / 3 - v3.y, v.X / 3 - v3.y);
+
+                vertices.Add(v3);
+                uv.Add(v2);
+            };
+
+            Vector2[] pT1 = segmentTerminal1Limit[s.Id];
+            Vector2[] pT2 = segmentTerminal2Limit[s.Id];
+            
+            addV(pT1[0], SidewalkHeight - SideCoverHeight, 1);
+            addV(pT1[0], SidewalkHeight, 1);
+            addV(pT1[1], SidewalkHeight, 1);
+            addV(pT1[1], 0, 1);
+            addV(pT1[2], 0, 1);
+            addV(pT1[2], SidewalkHeight, 1);
+            addV(pT1[3], SidewalkHeight, 1);
+            addV(pT1[3], SidewalkHeight - SideCoverHeight, 1);
+
+            addV(pT2[0], SidewalkHeight - SideCoverHeight, 2);
+            addV(pT2[0], SidewalkHeight, 2);
+            addV(pT2[1], SidewalkHeight, 2);
+            addV(pT2[1], 0, 2);
+            addV(pT2[2], 0, 2);
+            addV(pT2[2], SidewalkHeight, 2);
+            addV(pT2[3], SidewalkHeight, 2);
+            addV(pT2[3], SidewalkHeight - SideCoverHeight, 2);
+
+            triangles.AddRange(new[] { 0, 15, 14 });       // sidewalk side cover 0
+            triangles.AddRange(new[] { 0, 14, 1 });       // sidewalk side cover 1
+            triangles.AddRange(new[] { 1, 14, 13 });       // sidewalk surface 0
+            triangles.AddRange(new[] { 1, 13, 2 });   // sidewalk surface 1
+            triangles.AddRange(new[] { 2, 12, 3 });   // sidewalk road raise 0
+            triangles.AddRange(new[] { 2, 13, 12 });   // sidewalk road raise 1
+
+            // Road surface
+            triangles.AddRange(new[] { 3, 12, 11 });   // road surface 0
+            triangles.AddRange(new[] { 3, 11, 4 });   // road surface 0
+
+            // Left sidewalk
+            triangles.AddRange(new[] { 4, 11, 10 }); // sidewalk road raise 0
+            triangles.AddRange(new[] { 4, 10, 5 });  // sidewalk road raise 1
+            triangles.AddRange(new[] { 5, 10, 9 }); // sidewalk surface 0
+            triangles.AddRange(new[] { 5, 9, 6 });  // sidewalk surface 1
+            triangles.AddRange(new[] { 6, 9, 8 });  // sidewalk side cover 0
+            triangles.AddRange(new[] { 6, 8, 7 });  // sidewalk side cover 1
+
+            // Construct mesh
+            Mesh mesh = new Mesh();
+            mesh.vertices = vertices.ToArray();
+            mesh.triangles = triangles.ToArray();
+            mesh.uv = uv.ToArray();
+            mesh.RecalculateNormals();
+
+            // Construct game object
+            GameObject inters = new GameObject("road" + s.Id);
+            inters.transform.parent = parent.transform;
+
+            MeshFilter meshFilter = inters.AddComponent<MeshFilter>();
+            meshFilter.mesh = mesh;
+
+            MeshRenderer meshRenderer = inters.AddComponent<MeshRenderer>();
+            meshRenderer.materials = new[] { RoadMaterial };
+
+#if DEBUG_ROAD_MESH_GENERATOR
+            // Debug draw
+            Color color = (s.LanesTo1 >= 3) ? Color.magenta : Color.red;
+            Debug.DrawLine(
+                new Vector3(s.Terminal1.Y, map.GetHeight((int)s.Terminal1.X, (int)s.Terminal1.Y) + 1f, s.Terminal1.X),
+                new Vector3(s.Terminal2.Y, map.GetHeight((int)s.Terminal2.X, (int)s.Terminal2.Y) + 1f, s.Terminal2.X),
+                color, 10000);
+#endif
+        }
+    }
+}

Game/Assets/Scripts/Unity/RoadMeshGenerator.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 6515820b5324dbf4baa10c3a1a480eaa
+timeCreated: 1432970903
+licenseType: Free
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Game/Assets/Scripts/Unity/TerrainGeneratorScript.cs

@@ -3,6 +3,7 @@ using System.Collections;
 using System.Linq;
 using TransportGame.Generator;
 using TransportGame.Model;
+using TransportGame.Unity;
 using TransportGame.Utils;
 using UnityEngine;
 
@@ -14,6 +15,7 @@ public class TerrainGeneratorScript : MonoBehaviour
 	public int TerrainHeight = 1024;
 	public GameObject WaterObject;
     public Texture2D[] Textures;
+    public Material RoadMaterial;
 
 	// Use this for initialization
 	void Start()
@@ -101,55 +103,49 @@ public class TerrainGeneratorScript : MonoBehaviour
 		}
         yield return null;
 
-		// Set up textures
-        //SetupSplatmaps(terrainData);
+        // Set up textures
+        Logger.Info("Setting up textures...");
+        foreach (var i in SetupSplatmaps(terrainData))
+            yield return i;
+
+        // Generate road mesh
+        Logger.Info("Generating roads...");
+        RoadMeshGenerator meshGenerator = new RoadMeshGenerator();
+        meshGenerator.RoadMaterial = RoadMaterial;
+        foreach (object i in meshGenerator.Generate(map))
+            yield return i;
 
         // -- DEBUG --
 
         foreach (var center in map.PopulationCenters)
             Debug.DrawLine(new Vector3(center.Y, 0, center.X), new Vector3(center.Y, map.Biome.Height, center.X), Color.yellow, 100000);
-
-        // Debug - draw lines
-        if (map != null && map.RoadNetwork != null)
-        {
-            foreach (var segment in map.RoadNetwork.ArticulationSegments)
-            {
-                Color color = (segment.Value.LanesTo1 >= 3) ? Color.magenta : Color.red;
-                Debug.DrawLine(new Vector3(segment.Value.Terminal1.Y, map.Biome.Height / 2, segment.Value.Terminal1.X), new Vector3(segment.Value.Terminal2.Y, map.Biome.Height / 2, segment.Value.Terminal2.X), color, 10000);
-            }
-
-            foreach (var node in map.RoadNetwork.Nodes)
-            {
-                Debug.DrawLine(new Vector3(node.Value.Y, map.Biome.Height / 2, node.Value.X), new Vector3(node.Value.Y, map.Biome.Height / 2 + 5, node.Value.X), Color.blue, 10000);
-            }
-        }
 	}
 
-    private void SetupSplatmaps(TerrainData terrainData)
+    private float[,,] GenerateSplatData(int alphaWidth, int alphaHeight, int alphaLayers)
     {
-        float[, ,] splatData = new float[terrainData.alphamapWidth, terrainData.alphamapHeight, terrainData.alphamapLayers];
-        Expression[] expressions = new Expression[terrainData.alphamapLayers];
+        float[, ,] splatData = new float[alphaWidth, alphaHeight, alphaLayers];
+        Expression[] expressions = new Expression[alphaLayers];
 
-        for (int y = 0; y < terrainData.alphamapHeight; y++)
-            for (int x = 0; x < terrainData.alphamapWidth; x++)
+        for (int y = 0; y < alphaHeight; y++)
+            for (int x = 0; x < alphaWidth; x++)
             {
-                float y_01 = (float)y / (float)terrainData.alphamapHeight;
-                float x_01 = (float)x / (float)terrainData.alphamapWidth;
+                float y_01 = (float)y / (float)alphaHeight;
+                float x_01 = (float)x / (float)alphaWidth;
 
                 int ix = Mathf.RoundToInt(x_01 * TerrainWidth);
                 int iy = Mathf.RoundToInt(y_01 * TerrainHeight);
 
                 // Get height
                 float height = map.GetHeight(ix, iy);
-                
+
                 // Get steepness
                 float steepness = map.GetSteepness(ix, iy);
-                
+
                 // Go through each texture layer
-                float[] weights = new float[terrainData.alphamapLayers];
+                float[] weights = new float[alphaLayers];
                 float sum = 0;
 
-                for (int t = 0; t < terrainData.alphamapLayers; t++)
+                for (int t = 0; t < alphaLayers; t++)
                 {
                     // Set up expression
                     if (expressions[t] == null)
@@ -160,7 +156,7 @@ public class TerrainGeneratorScript : MonoBehaviour
 
                     expressions[t].Variables["height"] = height;
                     expressions[t].Variables["steepness"] = steepness;
-                    expressions[t].Variables["maxHeight"] = terrainData.size.y;
+                    expressions[t].Variables["maxHeight"] = map.Biome.Height;
                     expressions[t].Variables["waterLevel"] = map.WaterLevel - 1f;
 
                     // Obtain weight
@@ -169,12 +165,25 @@ public class TerrainGeneratorScript : MonoBehaviour
                 }
 
                 // Normalize and copy weights
-                for (int t = 0; t < terrainData.alphamapLayers; t++)
+                for (int t = 0; t < alphaLayers; t++)
                 {
                     splatData[x, y, t] = weights[t] / sum;
                 }
             }
 
+        return splatData;
+    }
+
+    private IEnumerable SetupSplatmaps(TerrainData terrainData)
+    {
+        float[, ,] splatData = null;
+        int alphaW = terrainData.alphamapWidth;
+        int alphaH = terrainData.alphamapHeight;
+        int alphaL = terrainData.alphamapLayers;
+
+        foreach (var i in Task.RunAsync(() => splatData = GenerateSplatData(alphaW, alphaH, alphaL)))
+            yield return i;
+
         terrainData.SetAlphamaps(0, 0, splatData);
     }
 

Game/Assets/Scripts/Utils/Logger.cs

@@ -61,6 +61,10 @@ namespace TransportGame.Utils
                     case Level.Critical:
                         UnityEngine.Debug.LogError(String.Format(format, args));
                         break;
+
+                    case Level.Info:
+                        UnityEngine.Debug.Log(String.Format(format, args));
+                        break;
                 }
             }
         }

Game/Game-csharp.sln

@@ -23,7 +23,7 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
-																																																																																																																					GlobalSection(MonoDevelopProperties) = preSolution
+																																																																																																																									GlobalSection(MonoDevelopProperties) = preSolution
 		StartupItem = Assembly-CSharp.csproj
 		Policies = $0
 		$0.TextStylePolicy = $1

Game/Game.sln

@@ -29,7 +29,7 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
-																																																																																																																				GlobalSection(MonoDevelopProperties) = preSolution
+																																																																																																																								GlobalSection(MonoDevelopProperties) = preSolution
 		StartupItem = Assembly-CSharp.csproj
 		Policies = $0
 		$0.TextStylePolicy = $1

Game/UnityVS.Game.CSharp.csproj

@@ -7,16 +7,14 @@
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{02576F1D-BE9C-CFA7-763D-1EBF63B36977}</ProjectGuid>
     <OutputType>Library</OutputType>
-    <RootNamespace>
-    </RootNamespace>
+    <RootNamespace></RootNamespace>
     <AssemblyName>Assembly-CSharp</AssemblyName>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{E097FAD1-6243-4DAD-9C02-E9B9EFC3FFC1};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <TargetFrameworkIdentifier>.NETFramework</TargetFrameworkIdentifier>
     <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
     <TargetFrameworkProfile>Unity Subset v3.5</TargetFrameworkProfile>
-    <CompilerResponseFile>
-    </CompilerResponseFile>
+    <CompilerResponseFile></CompilerResponseFile>
     <UnityProjectType>Game:1</UnityProjectType>
     <UnityBuildTarget>StandaloneWindows64:19</UnityBuildTarget>
     <UnityVersion>5.0.1f1</UnityVersion>
@@ -90,6 +88,7 @@
     <Compile Include="Assets\Scripts\Noise\NoiseGenerator.cs" />
     <Compile Include="Assets\Scripts\Noise\PerlinNoiseGenerator.cs" />
     <Compile Include="Assets\Scripts\Unity\InitializeScript.cs" />
+    <Compile Include="Assets\Scripts\Unity\RoadMeshGenerator.cs" />
     <Compile Include="Assets\Scripts\Unity\TerrainGeneratorScript.cs" />
     <Compile Include="Assets\Scripts\Utils\Algorithms.cs" />
     <Compile Include="Assets\Scripts\Utils\Algorithms\GridTraverseAlgorithm.cs" />
@@ -109,8 +108,5 @@
     <None Include="Assets\Data\Config\tergen.xml" />
     <None Include="Assets\Standard Assets\Environment\Water (Basic)\Shaders\FXWaterBasic.shader" />
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Assets\Scripts\Storage\" />
-  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\SyntaxTree\UnityVS\2013\UnityVS.CSharp.targets" />
-</Project>
+</Project>