Add light radius check

KeepersCompound.LGS/Database/File.cs

@@ -142,6 +142,8 @@ public class DbFile
             "P$OTxtRepr1" => new PropertyChunk<PropString>(),
             "P$OTxtRepr2" => new PropertyChunk<PropString>(),
             "P$OTxtRepr3" => new PropertyChunk<PropString>(),
+            "P$Light" => new PropertyChunk<PropLight>(),
+            "P$LightColo" => new PropertyChunk<PropLightColor>(),
             "P$RenderAlp" => new PropertyChunk<PropFloat>(),
             "LD$MetaProp" => new LinkDataMetaProp(),
             _ when entryName.StartsWith("L$") => new LinkChunk(),

KeepersCompound.LGS/Database/ObjectHierarchy.cs

@@ -99,6 +99,8 @@ public class ObjectHierarchy
         AddProp<PropString>("P$OTxtRepr2");
         AddProp<PropString>("P$OTxtRepr3");
         AddProp<PropFloat>("P$RenderAlp");
+        AddProp<PropLight>("P$Light");
+        AddProp<PropLightColor>("P$LightColo");
     }
 
     public T GetProperty<T>(int objectId, string propName) where T : Property

KeepersCompound.Lightmapper/Program.cs

@@ -13,6 +13,7 @@ class Program
         public Vector3 position;
         public Vector3 color;
         public float radius;
+        public float r2;
     }
 
     static void Main(string[] args)
@@ -34,13 +35,35 @@ class Program
                     lights.Add(new Light
                     {
                         position = brush.position,
-                        color = HsbToRgb(360 * sz.Y, sz.Z, Math.Min(sz.X, 255.0f)),
+                        color = HsbToRgb(sz.Y, sz.Z, Math.Min(sz.X, 255.0f)),
-                        radius = float.MaxValue
+                        radius = float.MaxValue,
+                        r2 = float.MaxValue
                     });
                 }
-            }
+                else if (brush.media == BrList.Brush.Media.Object)
+                {
+                    var id = (int)brush.brushInfo;
+                    var light = hierarchy.GetProperty<PropLight>(id, "P$Light");
+                    var lightColor = hierarchy.GetProperty<PropLightColor>(id, "P$LightColo");
 
-            // TODO: object lights
+                    if (light != null)
+                    {
+                        lightColor ??= new PropLightColor { Hue = 0, Saturation = 0 };
+                        lights.Add(new Light
+                        {
+                            position = brush.position,
+                            color = HsbToRgb(lightColor.Hue, lightColor.Saturation, light.Brightness),
+                            radius = light.Radius,
+                            r2 = light.Radius * light.Radius,
+                        });
+                    }
+                    else
+                    {
+                        Console.WriteLine($"no light prop apparently");
+
+                    }
+                }
+            }
         }
 
         // Build embree mesh
@@ -60,12 +83,15 @@ class Program
         var dir = Path.GetDirectoryName(misPath);
         var filename = Path.GetFileNameWithoutExtension(misPath);
         mis.Save(Path.Join(dir, $"{filename}-lit.cow"));
+
+        Console.WriteLine($"Lit {lights.Count} light");
     }
 
-    // Expects Hue to be 0-360, saturation 0-1, brightness 0-255
+    // Expects Hue and Saturation are 0-1, Brightness 0-255
     // https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_RGB
     private static Vector3 HsbToRgb(float hue, float saturation, float brightness)
     {
+        hue *= 360;
         var hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6;
         var f = hue / 60 - Math.Floor(hue / 60);
 
@@ -140,7 +166,6 @@ class Program
                 for (var j = 0; j < numPolyVertices; j++)
                 {
                     var vertex = cell.Vertices[cell.Indices[cellIdxOffset + j]];
-                    // Console.WriteLine($"Cell: {cellIdx}, Poly: {polyIdx}, V: {j}, Vert: {vertex}");
                     vertices.Add(vertex);
                 }
 
@@ -163,18 +188,22 @@ class Program
         var cells = wr.Cells;
         for (var cellIdx = 0; cellIdx < cells.Length; cellIdx++)
         {
+            Console.Write($"\rLighting cell... {cellIdx + 1}/{cells.Length}\n");
+
             var cell = cells[cellIdx];
             var numPolys = cell.PolyCount;
             var numRenderPolys = cell.RenderPolyCount;
             var numPortalPolys = cell.PortalPolyCount;
 
             // There's nothing to render
+            // Portal polys can be render polys (e.g. water) but we're ignoring them for now
             if (numRenderPolys == 0 || numPortalPolys >= numPolys)
             {
                 continue;
             }
 
             var maxPolyIdx = Math.Min(numRenderPolys, numPolys - numPortalPolys);
+            var cellIdxOffset = 0;
             for (int polyIdx = 0; polyIdx < maxPolyIdx; polyIdx++)
             {
                 var poly = cell.Polys[polyIdx];
@@ -183,7 +212,68 @@ class Program
                 var info = cell.LightList[polyIdx];
                 var lightmap = cell.Lightmaps[polyIdx];
 
-                // Clear existing lightmap data
+                ResetLightmap(ambientLight, lightmap);
+
+                // Get world position of lightmap (0, 0) (+0.5 so we cast from the center of a pixel)
+                var topLeft = cell.Vertices[cell.Indices[cellIdxOffset]];
+                topLeft -= renderPoly.TextureVectors.Item1 * (renderPoly.TextureBases.Item1 - info.Bases.Item1 * 0.25f);
+                topLeft -= renderPoly.TextureVectors.Item2 * (renderPoly.TextureBases.Item2 - info.Bases.Item2 * 0.25f);
+
+                foreach (var light in lights)
+                {
+                    // Check if plane normal is facing towards the light
+                    // If it's not then we're never going to be (directly) lit by this
+                    // light.
+                    var centerDirection = renderPoly.Center - light.position;
+                    if (Vector3.Dot(plane.Normal, centerDirection) >= 0)
+                    {
+                        continue;
+                    }
+
+                    for (var y = 0; y < lightmap.Height; y++)
+                    {
+                        for (var x = 0; x < lightmap.Width; x++)
+                        {
+                            var pos = topLeft;
+                            pos += x * 0.25f * renderPoly.TextureVectors.Item1;
+                            pos += y * 0.25f * renderPoly.TextureVectors.Item2;
+
+                            // If we're out of range there's no point casting a ray
+                            // There's probably a better way to discard the entire lightmap
+                            // if we're massively out of range
+                            var direction = pos - light.position;
+                            if (direction.LengthSquared() > light.r2)
+                            {
+                                continue;
+                            }
+
+                            // We cast from the light to the pixel because the light has
+                            // no mesh in the scene to hit
+                            var hitResult = scene.Trace(new Ray
+                            {
+                                Origin = light.position,
+                                Direction = Vector3.Normalize(direction),
+                            });
+
+                            // cheeky epsilon
+                            var hit = hitResult && Math.Abs(hitResult.Distance - direction.Length()) < 0.001;
+                            if (hit)
+                            {
+                                lightmap.AddLight(0, x, y, (byte)light.color.X, (byte)light.color.Y, (byte)light.color.Z);
+                            }
+                        }
+                    }
+                }
+
+                cellIdxOffset += poly.VertexCount;
+            }
+        }
+
+        Console.Write("\n");
+    }
+
+    private static void ResetLightmap(Vector3 ambientLight, WorldRep.Cell.Lightmap lightmap)
+    {
         for (var i = 0; i < lightmap.Pixels.Length; i++)
         {
             lightmap.Pixels[i] = 0;
@@ -196,48 +286,5 @@ class Program
                 lightmap.AddLight(0, x, y, (byte)ambientLight.X, (byte)ambientLight.Y, (byte)ambientLight.Z);
             }
         }
-
-                foreach (var light in lights)
-                {
-                    Console.WriteLine("Doing a light...");
-                    // Check if plane normal is facing towards the light
-                    var direction = renderPoly.Center - light.position;
-                    Console.WriteLine($"Light Pos: {light.position}, poly center: {renderPoly.Center}");
-                    Console.WriteLine($"Dir: {direction}");
-                    // if (Vector3.Dot(plane.Normal, direction) < 0)
-                    {
-                        // Cast from the light to the center (later each pixel)
-                        var hit = scene.Trace(new Ray
-                        {
-                            Origin = light.position,
-                            Direction = Vector3.Normalize(direction)
-                        });
-
-                        // cheeky epsilon
-                        var goodHit = hit && Math.Abs(hit.Distance - direction.Length()) < 0.001;
-                        Console.WriteLine($"Did we hit? {goodHit}");
-                        Console.WriteLine($"Distance: {hit.Distance}, target dist: {direction.Length()}");
-                        Console.WriteLine($"Pos: {hit.Position}, Target Pos: {renderPoly.Center}");
-
-                        // Iterate all pixels
-                        var color = goodHit ? light.color : ambientLight;
-                        for (var y = 0; y < lightmap.Height; y++)
-                        {
-                            for (var x = 0; x < lightmap.Width; x++)
-                            {
-                                lightmap.AddLight(0, x, y, (byte)color.X, (byte)color.Y, (byte)color.Z);
-                            }
-                        }
-                    }
-                }
-
-
-                // // TODO: Get world position of each pixel?
-
-                // var poly = cell.Polys[polyIdx];
-
-                // poly.
-            }
-        }
     }
 }