SparkClient/Views/Grading/GradingResult.xaml.cs

using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Media3D;
using HelixToolkit.Wpf.SharpDX;
using SharpDX;
using SparkClient.Model.Entity;
using SparkClient.Model.Helper;
using SparkClient.ViewModel.Grading;
using GeometryModel3D = HelixToolkit.Wpf.SharpDX.GeometryModel3D;
using MeshGeometry3D = HelixToolkit.Wpf.SharpDX.MeshGeometry3D;
using PerspectiveCamera = HelixToolkit.Wpf.SharpDX.PerspectiveCamera;

namespace SparkClient.Views.Grading;

public partial class GradingResult 
{
    List<Viewport3DTriangleEntity> triangles = new List<Viewport3DTriangleEntity>();
    List<GeometryModel3D> mouseAddModels = new List<GeometryModel3D>();
    public GradingResult()
    {
        InitializeComponent();

        DataContext = new GradingResultVM(null);
        
        this.Viewport3Dx.EffectsManager = new DefaultEffectsManager();
        this.Viewport3Dx.Camera = new PerspectiveCamera()
        {
            Position = new Point3D(0, 0, 5),
            LookDirection = new Vector3D(0, 0, -1),
            UpDirection = new Vector3D(0, 1, 0),
            FarPlaneDistance = 1000,
            NearPlaneDistance = 0.1
        };

        Loaded += (sender, args) =>
        {
            var entities = Viewport3DHelper.InitDemo(Viewport3Dx);
            triangles.AddRange(entities);
        };
    }
    

    /// <summary>
    /// 点击模型
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void Viewport3Dx_OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        // 获取鼠标点击位置
        var mousePosition = e.GetPosition(Viewport3Dx);

        // 查找鼠标点击的 3D 对象
        var hits = Viewport3Dx.FindHits(mousePosition);

        // 如果没有命中任何 3D 对象
        if (hits == null || hits.Count == 0)
        {
            Console.WriteLine("未点击到任何模型");
            foreach (var item in mouseAddModels)
            {
                Viewport3Dx.Items.Remove(item);
            }
            mouseAddModels.Clear();
            return;
        }

        // 获取第一个命中的对象
        var hit = hits[0];

        // 检查是否是 MeshGeometryModel3D
        if (hit.ModelHit is MeshGeometryModel3D modelHit)
        {
            foreach (var item in mouseAddModels)
            {
                Viewport3Dx.Items.Remove(item);
            }
            mouseAddModels.Clear();
            // 获取几何信息
            var geometry = modelHit.Geometry as MeshGeometry3D;
            if (geometry != null)
            {
                // 获取命中的三角形索引
                var triangleIndex = hit.TriangleIndices;

                // 获取三角形顶点
                var vertex1 = geometry.Positions[triangleIndex.Item1];
                var vertex2 = geometry.Positions[triangleIndex.Item2];
                var vertex3 = geometry.Positions[triangleIndex.Item3];

                string strPoint = vertex1.X + ","+ vertex1.Y+","+ vertex1.Z + ";"+ vertex2.X + ","+ vertex2.Y + ","+ vertex2.Z+";"+vertex3.X + ","+ vertex3.Y + ","+ vertex3.Z;
                string triangleCode = Viewport3DTriangleEntity.GenerateMD5Hash(strPoint);
                
                //命中实体
                Viewport3DTriangleEntity res = triangles.Find(e => triangleCode.Equals(e.TriangleCode));

                if (res == null)
                    return;

                //命中面
                List<Viewport3DTriangleEntity> facet = triangles.Where(e => res.PlaneCode.Equals(e.PlaneCode)).ToList();
                var colorFacet = new Color4(1.0f, 1.0f, 0.0f, 1.0f);
                var data1 = Viewport3DHelper.GenerateEmissiveModelByEntity(Viewport3Dx,facet,colorFacet);
                mouseAddModels.AddRange(data1);
                //命中面标线
                var data2 = Viewport3DHelper.GenerateLineTextModelByEntity(Viewport3Dx, facet);
                mouseAddModels.AddRange(data2);
                //命中同类面
                List<Viewport3DTriangleEntity> facetType = triangles.Where(e => res.PlaneType.Equals(e.PlaneType)).ToList();
                //排除自己
                facet.ForEach(e=>facetType.Remove(e));
                var colorFacetType = new Color4(0.9f, 0.9f, 0.7f, 1.0f);
                var data3 = Viewport3DHelper.GenerateEmissiveModelByEntity(Viewport3Dx,facetType,colorFacetType);
                mouseAddModels.AddRange(data3);
            }
        }
        else
        {
            Console.WriteLine("点击的对象不是 MeshGeometryModel3D");
        }
    }

    private void DataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {

    }

    private void DataGrid_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
    {

    }
}