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133 lines
3.9 KiB
133 lines
3.9 KiB
[Tool] |
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public partial class Terrain |
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{ |
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bool _unhandledMouseMotion = false; // Used to detect when mouse moves off the terrain. |
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Vector2I? _tileHover = null; // Position of currently hovered tile. |
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bool _isSelecting = false; // Whether left mouse is held down to select tiles. |
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(Vector2I Start, Vector2I End)? _selection = null; |
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public override void _Input(InputEvent ev) |
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{ |
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if (!IsEditing()) return; |
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if (_isSelecting && ev is InputEventMouseButton { ButtonIndex: MouseButton.Left, Pressed: false }) { |
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_isSelecting = false; |
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GetViewport().SetInputAsHandled(); |
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} |
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if ((ev is InputEventMouseButton { ButtonIndex: var wheel, ShiftPressed: true }) |
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&& (wheel is MouseButton.WheelUp or MouseButton.WheelDown)) |
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{ |
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const float AdjustHeight = 0.5f; |
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var value = (wheel == MouseButton.WheelUp) ? 1.0f : -1.0f; |
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foreach (var tile in GetSelectedTiles()) |
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AdjustTileHeight(tile, value * AdjustHeight); |
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if (_selection != null) |
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UpdateMeshAndShape(); |
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NotifyPropertyListChanged(); |
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GetViewport().SetInputAsHandled(); |
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} |
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if (ev is InputEventMouseMotion) |
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_unhandledMouseMotion = true; |
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} |
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public override void _InputEvent(Camera3D camera, InputEvent ev, Vector3 position, Vector3 normal, int shapeIdx) |
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{ |
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if (!IsEditing()) return; |
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var localPos = ToLocal(position); |
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var tilePos = ToTilePos(localPos); |
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if (ev is InputEventMouseButton { ButtonIndex: MouseButton.Left, Pressed: true }) { |
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_selection = (tilePos, tilePos); |
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_isSelecting = true; |
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GetViewport().SetInputAsHandled(); |
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} |
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if (ev is InputEventMouseMotion) { |
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_unhandledMouseMotion = false; |
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_tileHover = tilePos; |
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if (_isSelecting) _selection = _selection.Value with { End = tilePos }; |
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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 (!IsEditing()) { |
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_tileHover = null; |
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_selection = null; |
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_isSelecting = false; |
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} |
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if (_unhandledMouseMotion) |
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_tileHover = null; |
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if ((_tileHover != null) || (_selection != null)) { |
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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 bottomLeft, Vector3 bottomRight) { |
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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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if (_tileHover is Vector2I hover) { |
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var corners = GetGridCorners(hover); |
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var margin = 0.1f; |
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mesh.SurfaceSetColor(Colors.Black); |
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AddQuad( |
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corners.TopLeft + new Vector3(-margin, 0, -margin), |
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corners.TopRight + new Vector3(+margin, 0, -margin), |
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corners.BottomLeft + new Vector3(-margin, 0, +margin), |
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corners.BottomRight + new Vector3(+margin, 0, +margin) |
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); |
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} |
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mesh.SurfaceSetColor(Colors.Blue); |
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foreach (var tilePos in GetSelectedTiles()) { |
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var corners = GetGridCorners(tilePos); |
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AddQuad(corners.TopLeft, corners.TopRight, corners.BottomLeft, corners.BottomRight); |
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} |
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mesh.SurfaceEnd(); |
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mesh.SurfaceSetMaterial(0, _editToolMaterial); |
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} else { |
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var meshInstance = (MeshInstance3D)GetNodeOrNull("EditToolMesh"); |
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var mesh = (ImmediateMesh)meshInstance?.Mesh; |
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mesh?.ClearSurfaces(); |
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} |
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} |
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bool IsEditing() |
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{ |
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if (Engine.IsEditorHint()) { |
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var selection = EditorInterface.Singleton.GetSelection(); |
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return selection.GetSelectedNodes().Contains(this); |
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} else { |
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return false; |
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} |
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} |
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IEnumerable<Vector2I> GetSelectedTiles() |
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{ |
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if (_selection is not (Vector2I start, Vector2I end)) yield break; |
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// Ensure start.X/Y is smaller than end.X/Y. |
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(start, end) = (new(Min(start.X, end.X), Min(start.Y, end.Y)), |
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new(Max(start.X, end.X), Max(start.Y, end.Y))); |
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// Go over all tiles in the range and yield each one. |
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for (var x = start.X; x <= end.X; x++) |
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for (var y = start.Y; y <= end.Y; y++) |
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yield return new(x, y); |
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} |
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}
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