namespace Yw.WpfUI.Hydro
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{
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/// <summary>
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/// 抽象网格线辅助类
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/// </summary>
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internal class LogicalGridLineHelper
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{
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/// <summary>
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///
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/// </summary>
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public LogicalGridLineHelper(HelixViewport3D viewport)
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{
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_viewport = viewport;
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_gridLines = CreateGridLinesVisual3D();
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_viewport.CameraChanged += Viewport_CameraChanged;
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}
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private readonly HelixViewport3D _viewport = null;//三维组件
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private readonly GridLinesVisual3D _gridLines = null;//网格线
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/// <summary>
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/// 显示网格线
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/// </summary>
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public void Show()
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{
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var gridLines = _viewport.Children.OfType<GridLinesVisual3D>().FirstOrDefault();
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if (gridLines == null)
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{
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_gridLines.Visible = true;
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_viewport.Children.Add(_gridLines);
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UpdateGridLinesVisual3D();
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}
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else
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{
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gridLines.Visible = true;
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}
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}
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/// <summary>
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/// 隐藏网格线
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/// </summary>
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public void Hide()
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{
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var gridLines = _viewport.Children.OfType<GridLinesVisual3D>().FirstOrDefault();
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if (gridLines != null)
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{
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gridLines.Visible = false;
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}
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}
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/// <summary>
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/// 可见性
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/// </summary>
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public bool Visible
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{
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get
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{
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var gridLines = _viewport.Children.OfType<GridLinesVisual3D>().FirstOrDefault();
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if (gridLines == null)
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{
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return false;
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}
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if (!gridLines.Visible)
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{
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return false;
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}
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return true;
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}
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set
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{
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if (value)
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{
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Show();
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}
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else
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{
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Hide();
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}
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}
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}
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//创建网格线
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private GridLinesVisual3D CreateGridLinesVisual3D()
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{
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var gridLines = new GridLinesVisual3D();
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gridLines.Thickness = 0.05;
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gridLines.MajorDistance = 5;
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gridLines.MinorDistance = 1;
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gridLines.Fill = Brushes.Black;
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return gridLines;
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}
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//相机改变
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private void Viewport_CameraChanged(object sender, RoutedEventArgs e)
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{
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UpdateGridLinesVisual3D();
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}
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// 更新网格大小的方法
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private void UpdateGridLinesVisual3D()
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{
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var gridLines = _viewport.Children.OfType<GridLinesVisual3D>().FirstOrDefault();
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if (gridLines == null)
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{
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return;
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}
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if (!gridLines.Visible)
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{
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return;
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}
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Rect3D bounds = Rect3D.Empty;
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foreach (Visual3D child in _viewport.Children.OfType<LogicalVisual3D>())
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{
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if (!(child is IBoundsIgnoredVisual3D))
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{
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Rect3D rect = child.FindBounds(Transform3D.Identity);
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bounds.Union(rect);
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}
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}
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if (!bounds.IsEmpty)
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{
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// 计算最大尺寸并增加20%边距
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double maxSize = Math.Max(bounds.SizeX,
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Math.Max(bounds.SizeY, bounds.SizeZ)) * 1.5;
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// 设置网格大小
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gridLines.Width = maxSize;
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gridLines.Length = maxSize;
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// 保持网格居中
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gridLines.Center = new Point3D(
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bounds.X + bounds.SizeX / 2,
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bounds.Y + bounds.SizeY / 2,
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0);
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// 根据尺寸自动调整网格密度
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gridLines.MinorDistance = Math.Max(1, maxSize / 20d);
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gridLines.MajorDistance = gridLines.MinorDistance * 5;
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}
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else
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{
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// 默认大小（当场景为空时）
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gridLines.Width = 100;
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gridLines.Length = 100;
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gridLines.Center = new Point3D(0, 0, 0);
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}
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}
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}
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}
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