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245 lines
8.4 KiB
245 lines
8.4 KiB
using System.IO; |
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public partial class Terrain |
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{ |
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enum ToolMode { Height, Flatten, Paint } |
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enum ToolShape { Corner, Circle, Square } |
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// Set by the terrain editing plugin. |
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public EditorUndoRedoManager EditorUndoRedo { get; set; } |
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Material _editToolMaterial; |
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public override void _EnterTree() |
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{ |
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_editToolMaterial = new StandardMaterial3D { |
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AlbedoColor = Colors.Blue, |
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ShadingMode = BaseMaterial3D.ShadingModeEnum.Unshaded, |
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DepthDrawMode = BaseMaterial3D.DepthDrawModeEnum.Disabled, |
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NoDepthTest = true, |
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}; |
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} |
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public bool EditorInput(InputEventMouse ev, Vector3 position, Control controls) |
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{ |
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var prevent_default = false; |
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var toolMode = (ToolMode)(int)controls.Get("tool_mode"); |
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var toolShape = (ToolShape)(int)controls.Get("tool_shape"); |
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var texture = (int)controls.Get("texture"); |
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var drawSize = (int)controls.Get("draw_size"); |
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var isRaise = (bool)controls.Get("is_raise"); |
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var isConnected = (bool)controls.Get("is_connected"); |
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var isFlatten = toolMode == ToolMode.Flatten; |
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var isCorner = toolShape == ToolShape.Corner; |
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var hover = ToTilePos(position); |
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if (isCorner) drawSize = 1; |
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var isEven = (drawSize % 2) == 0; |
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var radius = FloorToInt(drawSize / 2.0f); |
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// Offset hover tile position by corner. |
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if (isEven) hover.Position = hover.Corner switch { |
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Corner.TopLeft => hover.Position.Offset(0, 0), |
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Corner.TopRight => hover.Position.Offset(1, 0), |
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Corner.BottomRight => hover.Position.Offset(1, 1), |
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Corner.BottomLeft => hover.Position.Offset(0, 1), |
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_ => throw new InvalidOperationException(), |
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}; |
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IEnumerable<TilePos> GetTilesInSquare() { |
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var min = hover.Position.Offset(-radius, -radius); |
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var max = hover.Position.Offset(+radius, +radius); |
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if (isEven) max = max.Offset(-1, -1); |
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for (var x = min.X; x <= max.X; x++) |
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for (var y = min.Y; y <= max.Y; y++) |
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yield return new(x, y); |
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} |
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IEnumerable<TilePos> GetTilesInRadius() { |
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var center = isEven ? hover.Position.ToVector2I() |
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: hover.Position.ToCenter(); |
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var distanceSqr = Pow(radius + 0.25f * (isEven ? -1 : 1), 2); |
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return GetTilesInSquare().Where(tile => |
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center.DistanceSquaredTo(tile.ToCenter()) < distanceSqr); |
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} |
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var tiles = (toolShape switch { |
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ToolShape.Corner => [ hover.Position ], |
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ToolShape.Circle => GetTilesInRadius(), |
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ToolShape.Square => GetTilesInSquare(), |
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_ => throw new InvalidOperationException(), |
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}).ToHashSet(); |
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// TODO: Handle different tool modes, such as painting. |
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// TODO: Finally allow editing single corners. |
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// TODO: Allow click-dragging which doesn't affect already changed tiles / corners. |
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// TODO: Make mesh generation generate vertical walls between disconnected corners. |
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// TODO: Use ArrayMesh instead of ImmediateMesh. |
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// TODO: Dynamically expand terrain instead of having it be a set size. |
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// Raise / lower the terrain when left mouse button is pressed. |
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if (ev is InputEventMouseButton { ButtonIndex: MouseButton.Left, Pressed: true }) { |
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prevent_default = true; |
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var cornersToChange = new HashSet<(TilePos Position, Corner Corner)>(); |
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// Raise selected tiles themselves. |
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foreach (var pos in tiles) |
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foreach (var corner2 in Enum.GetValues<Corner>()) |
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cornersToChange.Add((pos, corner2)); |
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if (isConnected) { |
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// If the 'connected_toggle' button is active, move "connected" corners. |
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// Connected corners are the ones that are at the same height as ones already being moved. |
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foreach (var pos in tiles) { |
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var tile = GetTile(pos); |
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foreach (var corner in Enum.GetValues<Corner>()) { |
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var height = tile.Height[corner]; |
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foreach (var (neighborPos, neighborCorner) in GetNeighbors(pos, corner)) { |
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if (tiles.Contains(neighborPos)) continue; |
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var neighborHeight = GetTile(neighborPos).Height[neighborCorner]; |
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if (neighborHeight == height) cornersToChange.Add((neighborPos, neighborCorner)); |
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} |
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} |
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} |
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} |
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const float AdjustHeight = 0.5f; |
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var amount = isFlatten ? GetTile(hover.Position).Height[hover.Corner] |
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: isRaise ? AdjustHeight : -AdjustHeight; |
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var tilesPrevious = new List<(TilePos, Corners<float>)>(); |
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var tilesChanged = new List<(TilePos, Corners<float>)>(); |
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foreach (var group in cornersToChange.GroupBy(c => c.Position, c => c.Corner)) { |
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var pos = group.Key; |
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var tile = GetTile(pos); |
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tilesPrevious.Add((pos, tile.Height)); |
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var newHeight = tile.Height; |
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foreach (var corner in group) { |
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if (isFlatten) newHeight[corner] = amount; |
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else newHeight[corner] += amount; |
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} |
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tilesChanged.Add((pos, newHeight)); |
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} |
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if (EditorUndoRedo is EditorUndoRedoManager undo) { |
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var name = "Modify terrain height"; // TODO: Change name depending on tool mode. |
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undo.CreateAction(name, backwardUndoOps: false); |
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undo.AddDoMethod(this, nameof(DoModifyTerrainHeight), Pack(tilesChanged)); |
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undo.AddDoMethod(this, nameof(UpdateMeshAndShape)); |
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undo.AddDoMethod(this, GodotObject.MethodName.NotifyPropertyListChanged); |
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undo.AddUndoMethod(this, nameof(DoModifyTerrainHeight), Pack(tilesPrevious)); |
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undo.AddUndoMethod(this, nameof(UpdateMeshAndShape)); |
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undo.AddUndoMethod(this, GodotObject.MethodName.NotifyPropertyListChanged); |
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undo.CommitAction(true); |
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} |
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} |
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UpdateEditToolMesh(tiles); |
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return prevent_default; |
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} |
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public void EditorUnfocus() |
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=> ClearEditToolMesh(); |
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public void DoModifyTerrainHeight(byte[] data) |
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{ |
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foreach (var (pos, corners) in Unpack(data)) { |
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var tile = GetTile(pos); |
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tile.Height = corners; |
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SetTile(pos, tile); |
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} |
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} |
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void UpdateEditToolMesh(IEnumerable<TilePos> tiles) |
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{ |
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var mesh = GetOrCreateMesh("EditToolMesh"); |
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mesh.ClearSurfaces(); |
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mesh.SurfaceBegin(Mesh.PrimitiveType.Lines); |
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void AddLine(Vector3 start, Vector3 end) { |
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mesh.SurfaceAddVertex(start); |
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mesh.SurfaceAddVertex(end); |
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} |
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void AddQuad(Vector3 topLeft , Vector3 topRight , |
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Vector3 bottomRight, Vector3 bottomLeft) { |
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AddLine(topLeft , topRight ); |
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AddLine(topRight , bottomRight); |
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AddLine(bottomRight, bottomLeft ); |
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AddLine(bottomLeft , topLeft ); |
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} |
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foreach (var tile in tiles) { |
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var (topLeft, topRight, bottomRight, bottomLeft) |
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= GetTileCornerPositions(tile); |
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AddQuad(topLeft, topRight, bottomRight, bottomLeft); |
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} |
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mesh.SurfaceEnd(); |
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mesh.SurfaceSetMaterial(0, _editToolMaterial); |
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} |
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void ClearEditToolMesh() |
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=> GetNodeOrNull("EditToolMesh")?.QueueFree(); |
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(TilePos Position, Corner Corner) ToTilePos(Vector3 position) |
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{ |
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var local = ToLocal(position); |
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var coord = new Vector2(local.X, local.Z) / TileSize + (Size + Vector2.One) / 2; |
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var pos = TilePos.From(coord); |
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var corner = coord.PosMod(1).RoundToVector2I() switch { |
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(0, 0) => Corner.TopLeft, |
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(1, 0) => Corner.TopRight, |
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(1, 1) => Corner.BottomRight, |
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(0, 1) => Corner.BottomLeft, |
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_ => throw new InvalidOperationException(), |
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}; |
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return (pos, corner); |
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} |
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static readonly Dictionary<Corner, (int X, int Y, Corner Opposite)[]> _offsetLookup = new(){ |
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[Corner.TopLeft ] = [(-1, -1, Corner.BottomRight), (-1, 0, Corner.TopRight ), (0, -1, Corner.BottomLeft )], |
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[Corner.TopRight ] = [(+1, -1, Corner.BottomLeft ), (+1, 0, Corner.TopLeft ), (0, -1, Corner.BottomRight)], |
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[Corner.BottomRight] = [(+1, +1, Corner.TopLeft ), (+1, 0, Corner.BottomLeft ), (0, +1, Corner.TopRight )], |
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[Corner.BottomLeft ] = [(-1, +1, Corner.TopRight ), (-1, 0, Corner.BottomRight), (0, +1, Corner.TopLeft )], |
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}; |
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static IEnumerable<(TilePos, Corner)> GetNeighbors(TilePos pos, Corner corner) |
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=> _offsetLookup[corner].Select(e => (new TilePos(pos.X + e.X, pos.Y + e.Y), e.Opposite)); |
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static byte[] Pack(IEnumerable<(TilePos Position, Corners<float> Corners)> data) |
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{ |
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using var stream = new MemoryStream(); |
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using var writer = new BinaryWriter(stream); |
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foreach (var (pos, corners) in data) { |
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writer.Write(pos.X); |
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writer.Write(pos.Y); |
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writer.Write(corners.TopLeft); |
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writer.Write(corners.TopRight); |
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writer.Write(corners.BottomRight); |
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writer.Write(corners.BottomLeft); |
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} |
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return stream.ToArray(); |
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} |
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static IEnumerable<(TilePos Position, Corners<float> Corners)> Unpack(byte[] data) |
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{ |
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using var stream = new MemoryStream(data); |
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using var reader = new BinaryReader(stream); |
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while (stream.Position < stream.Length) { |
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var x = reader.ReadInt32(); |
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var y = reader.ReadInt32(); |
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var corners = new Corners<float>( |
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reader.ReadSingle(), reader.ReadSingle(), |
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reader.ReadSingle(), reader.ReadSingle()); |
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yield return (new(x, y), corners); |
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} |
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} |
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}
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