384 lines
11 KiB
C#
384 lines
11 KiB
C#
using Godot;
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using KeepersCompound.LGS.Database;
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using KeepersCompound.LGS.Database.Chunks;
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using KeepersCompound.TMV.UI;
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using RectpackSharp;
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using System;
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using System.Collections.Generic;
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namespace KeepersCompound.TMV;
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public partial class Mission : Node3D
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{
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private readonly struct LightmapRectData
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{
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public readonly int cellIndex;
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public readonly int lightmapIndex;
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public readonly int textureId;
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public readonly int uvStart;
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public readonly int uvEnd;
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public LightmapRectData(int cellIndex, int lightmapIndex, int textureId, int uvStart, int uvEnd)
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{
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this.cellIndex = cellIndex;
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this.lightmapIndex = lightmapIndex;
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this.textureId = textureId;
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this.uvStart = uvStart;
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this.uvEnd = uvEnd;
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}
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}
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[Export(PropertyHint.GlobalFile, "*.mis")]
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public string FileName { get; set; }
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[Export]
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public bool Build = false;
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[Export]
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public bool Clear = false;
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[Export]
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public bool Dump = false;
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InstallPaths _installPaths;
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DbFile _file;
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TextureLoader _textureLoader;
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public override void _Ready()
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{
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var missionSelector = GetNode<Control>("%MissionSelector") as MissionSelector;
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missionSelector.LoadMission += (string rootPath, string missionPath) =>
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{
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_installPaths = new InstallPaths(rootPath);
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FileName = missionPath;
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Build = true;
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};
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}
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public override void _Process(double delta)
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{
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if (Build)
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{
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RebuildMap();
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Build = false;
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}
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if (Clear)
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{
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ClearMap();
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Clear = false;
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}
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}
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public override void _Input(InputEvent @event)
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{
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if (@event is InputEventKey keyEvent && keyEvent.Pressed)
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{
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if (keyEvent.Keycode == Key.R)
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{
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Build = true;
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}
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}
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}
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public void ClearMap()
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{
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foreach (var node in GetChildren())
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{
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node.QueueFree();
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}
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}
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public void RebuildMap()
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{
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ClearMap();
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_textureLoader = new TextureLoader(_installPaths.famPath, FileName.GetBaseDir());
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_file = new(FileName);
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UseChunk<TxList>("TXLIST", LoadTextures);
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UseChunk<WorldRep>("WREXT", BuildWrMeshes);
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}
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private void UseChunk<T>(string name, Action<T> action)
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{
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if (_file.Chunks.TryGetValue(name, out var value))
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{
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action((T)value);
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}
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else
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{
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GD.Print($"No chunk found/loaded: {name}");
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}
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}
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private void BuildWrMeshes(WorldRep worldRep)
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{
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var cells = worldRep.Cells;
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var lmHdr = worldRep.DataHeader.LightmapFormat == 2;
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GD.Print($"HDR Lightmap: {lmHdr}");
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var packingRects = new List<PackingRectangle>();
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var surfaceDataMap = new Dictionary<int, MeshSurfaceData>();
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var rectDataMap = new Dictionary<int, LightmapRectData>();
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for (var cellIdx = 0; cellIdx < cells.Length; cellIdx++)
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{
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var cell = cells[cellIdx];
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var numPolys = cell.PolyCount;
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var numRenderPolys = cell.RenderPolyCount;
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var numPortalPolys = cell.PortalPolyCount;
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// There's nothing to render
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if (numRenderPolys == 0 || numPortalPolys >= numPolys)
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{
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continue;
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}
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// You'd think these would be the same number, but apparently not
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// I think it's because water counts as a render poly and a portal poly
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var maxPolyIdx = Math.Min(numRenderPolys, numPolys - numPortalPolys);
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var cellIdxOffset = 0;
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for (int polyIdx = 0; polyIdx < maxPolyIdx; polyIdx++)
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{
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var lightmapRectData = ProcessCellSurfaceData(surfaceDataMap, cell, cellIdx, polyIdx, cellIdxOffset);
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rectDataMap.Add(packingRects.Count, lightmapRectData);
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var light = cell.LightList[polyIdx];
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var rect = new PackingRectangle(0, 0, light.Width, light.Height, packingRects.Count);
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packingRects.Add(rect);
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cellIdxOffset += cell.Polys[polyIdx].VertexCount;
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}
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}
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var lightmapTexture = BuildLightmapTexture(cells, packingRects.ToArray(), rectDataMap, surfaceDataMap);
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foreach (var (textureId, surface) in surfaceDataMap)
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{
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if (surface.Empty)
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{
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continue;
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}
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var albedoTexture = _textureLoader.Get(textureId);
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var mesh = new ArrayMesh();
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mesh.AddSurfaceFromArrays(Mesh.PrimitiveType.Triangles, surface.BuildSurfaceArray());
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mesh.SurfaceSetMaterial(0, BuildMaterial(albedoTexture, lightmapTexture, lmHdr));
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var meshInstance = new MeshInstance3D { Mesh = mesh };
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AddChild(meshInstance);
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}
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}
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private LightmapRectData ProcessCellSurfaceData(Dictionary<int, MeshSurfaceData> surfaceDataMap, WorldRep.Cell cell, int cellIdx, int polyIdx, int indicesOffset)
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{
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var poly = cell.Polys[polyIdx];
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var normal = cell.Planes[poly.PlaneId].Normal.ToGodotVec3();
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var vertices = new List<Vector3>();
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var textureUvs = new List<Vector2>();
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var lightmapUvs = new List<Vector2>();
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var numPolyVertices = poly.VertexCount;
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for (var j = 0; j < numPolyVertices; j++)
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{
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var vertex = cell.Vertices[cell.Indices[indicesOffset + j]];
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vertices.Add(vertex.ToGodotVec3());
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}
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var renderPoly = cell.RenderPolys[polyIdx];
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var light = cell.LightList[polyIdx];
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var textureId = CalcBaseUV(cell, poly, renderPoly, light, textureUvs, lightmapUvs, indicesOffset);
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if (!surfaceDataMap.ContainsKey(textureId))
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{
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surfaceDataMap.Add(textureId, new MeshSurfaceData());
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}
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var surfaceData = surfaceDataMap[textureId];
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var (start, end) = surfaceData.AddPolygon(vertices, normal, textureUvs, lightmapUvs);
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if (polyIdx >= cell.Lightmaps.Length) GD.Print("HUH");
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return new LightmapRectData(cellIdx, polyIdx, textureId, start, end);
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}
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private static Texture BuildLightmapTexture(WorldRep.Cell[] cells, PackingRectangle[] packingRects, Dictionary<int, LightmapRectData> rectDataMap, Dictionary<int, MeshSurfaceData> surfaceDataMap)
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{
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RectanglePacker.Pack(packingRects, out var bounds);
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var image = Image.Create((int)bounds.Width, (int)bounds.Height, false, Image.Format.Rgba8);
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foreach (var rect in packingRects)
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{
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if (!rectDataMap.ContainsKey(rect.Id)) GD.Print("Invalid rectDataMap key");
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var info = rectDataMap[rect.Id];
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if (info.cellIndex >= cells.Length) GD.Print($"CellIndex too big: {info.cellIndex}/{cells.Length}");
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if (info.lightmapIndex >= cells[info.cellIndex].Lightmaps.Length) GD.Print($"LightmapIndex too big: {info.lightmapIndex}/{cells[info.cellIndex].Lightmaps.Length}");
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var lightmap = cells[info.cellIndex].Lightmaps[info.lightmapIndex];
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var layers = (uint)lightmap.Pixels.GetLength(0);
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var height = (uint)lightmap.Pixels.GetLength(1);
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var width = (uint)lightmap.Pixels.GetLength(2);
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for (uint y = 0; y < height; y++)
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{
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for (uint x = 0; x < width; x++)
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{
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var rawColour = System.Numerics.Vector4.Zero;
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for (uint l = 0; l < layers; l++)
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{
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rawColour += lightmap.GetPixel(l, x, y);
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}
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var colour = new Color(MathF.Min(rawColour.X, 1.0f), MathF.Min(rawColour.Y, 1.0f), MathF.Min(rawColour.Z, 1.0f), MathF.Min(rawColour.W, 1.0f));
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image.SetPixel((int)(rect.X + x), (int)(rect.Y + y), colour);
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}
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}
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if (!surfaceDataMap.ContainsKey(info.textureId)) GD.Print("Invalid SurfaceDataMap key");
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surfaceDataMap[info.textureId].TransformLightmapUvs(info.uvStart, info.uvEnd, (uv) =>
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{
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var u = uv.X;
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var v = uv.Y;
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// Clamp uv range to [0..1]
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u %= 1;
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v %= 1;
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if (u < 0) u = Math.Abs(u);
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if (v < 0) v = Math.Abs(v);
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// Transform!
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u = (rect.X + rect.Width * u) / (int)bounds.Width;
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v = (rect.Y + rect.Height * v) / (int)bounds.Height;
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return new Vector2(u, v);
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});
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}
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return ImageTexture.CreateFromImage(image);
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}
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private int CalcBaseUV(
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WorldRep.Cell cell,
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WorldRep.Cell.Poly poly,
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WorldRep.Cell.RenderPoly renderPoly,
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WorldRep.Cell.LightmapInfo light,
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List<Vector2> textureUvs,
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List<Vector2> lightmapUvs,
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int cellIdxOffset)
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{
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// TODO: This is slightly hardcoded for ND. Check other stuff at some point. Should be handled in LG side imo
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// TODO: This is a mess lol
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var textureId = renderPoly.TextureId;
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var texture = _textureLoader.Get(textureId);
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var texU = renderPoly.TextureVectors.Item1.ToGodotVec3();
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var texV = renderPoly.TextureVectors.Item2.ToGodotVec3();
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var baseU = renderPoly.TextureBases.Item1;
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var baseV = renderPoly.TextureBases.Item2;
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var txUScale = 64.0f / texture.GetWidth();
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var txVScale = 64.0f / texture.GetHeight();
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var lmUScale = 4.0f / light.Width;
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var lmVScale = 4.0f / light.Height;
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var txUBase = baseU * txUScale;
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var txVBase = baseV * txVScale;
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var lmUBase = lmUScale * (baseU + (0.5f - light.Bases.Item1) / 4.0f);
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var lmVBase = lmVScale * (baseV + (0.5f - light.Bases.Item2) / 4.0f);
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var uu = texU.Dot(texU);
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var vv = texV.Dot(texV);
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var uv = texU.Dot(texV);
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var anchor = cell.Vertices[cell.Indices[cellIdxOffset + 0]].ToGodotVec3(); // TODO: This probably shouldn't be hardcoded idx 0
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if (uv == 0.0)
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{
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var txUVec = texU * txUScale / uu;
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var txVVec = texV * txVScale / vv;
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var lmUVec = texU * lmUScale / uu;
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var lmVVec = texV * lmVScale / vv;
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for (var i = 0; i < poly.VertexCount; i++)
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{
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var v = cell.Vertices[cell.Indices[cellIdxOffset + i]].ToGodotVec3();
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var delta = new Vector3(v.X - anchor.X, v.Y - anchor.Y, v.Z - anchor.Z);
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var txUV = new Vector2(delta.Dot(txUVec) + txUBase, delta.Dot(txVVec) + txVBase);
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var lmUV = new Vector2(delta.Dot(lmUVec) + lmUBase, delta.Dot(lmVVec) + lmVBase);
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textureUvs.Add(txUV);
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lightmapUvs.Add(lmUV);
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}
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}
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else
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{
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var denom = 1.0f / (uu * vv - uv * uv);
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var txUu = uu * txVScale * denom;
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var txVv = vv * txUScale * denom;
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var txUvu = txUScale * denom * uv;
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var txUvv = txVScale * denom * uv;
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var lmUu = uu * lmVScale * denom;
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var lmVv = vv * lmUScale * denom;
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var lmUvu = lmUScale * denom * uv;
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var lmUvv = lmVScale * denom * uv;
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for (var i = 0; i < poly.VertexCount; i++)
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{
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var v = cell.Vertices[cell.Indices[cellIdxOffset + i]].ToGodotVec3();
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var delta = new Vector3(v.X - anchor.X, v.Y - anchor.Y, v.Z - anchor.Z);
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var du = delta.Dot(texU);
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var dv = delta.Dot(texV);
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var txUV = new Vector2(txUBase + txVv * du - txUvu * dv, txVBase + txUu * dv - txUvv * du);
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var lmUV = new Vector2(lmUBase + lmVv * du - lmUvu * dv, lmVBase + lmUu * dv - lmUvv * du);
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textureUvs.Add(txUV);
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lightmapUvs.Add(lmUV);
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}
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}
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return textureId;
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}
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private void LoadTextures(TxList textureList)
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{
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// TODO: Use PathJoin
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var count = textureList.ItemCount;
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for (var i = 0; i < count; i++)
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{
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var item = textureList.Items[i];
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var path = "/";
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for (var j = 0; j < item.Tokens.Length; j++)
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{
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var token = item.Tokens[j];
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if (token == 0)
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{
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break;
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}
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path += $"{textureList.Tokens[token - 1]}/";
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}
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path += item.Name;
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if (!_textureLoader.Load(i, path))
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{
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GD.Print($"Failed to load texture: {path}");
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}
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}
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if (Dump) DumpTextureList(textureList);
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}
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private static void DumpTextureList(TxList textureList)
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{
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GD.Print($"TXLIST:\n BlockSize: {textureList.BlockSize}\n ItemCount: {textureList.ItemCount}\n TokenCount: {textureList.TokenCount}\n Tokens:");
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for (var i = 0; i < textureList.TokenCount; i++)
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{
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GD.Print($" {i}: {textureList.Tokens[i]}");
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}
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GD.Print($" Items:");
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for (var i = 0; i < textureList.ItemCount; i++)
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{
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var item = textureList.Items[i];
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GD.Print($" {i}:\n Tokens: [{item.Tokens[0]}, {item.Tokens[1]}, {item.Tokens[2]}, {item.Tokens[3]}]\n Name: {item.Name}");
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}
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}
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const string MATERIAL_PATH = "res://project/materials/base.tres";
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private static Material BuildMaterial(Texture albedoTexture, Texture lightmapTexture, bool lmHdr)
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{
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var material = ResourceLoader.Load<ShaderMaterial>(MATERIAL_PATH).Duplicate() as ShaderMaterial;
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material.SetShaderParameter("texture_albedo", albedoTexture);
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material.SetShaderParameter("lightmap_albedo", lightmapTexture);
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material.SetShaderParameter("lightmap_2x", lmHdr);
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return material;
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}
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} |