本文实例为大家分享了WPF实现3D立方体波浪墙效果的具体代码,供大家参考,具体内容如下
实现效果如下:
思路:仿照3D粒子系统,将粒子颗粒的Geometry改造为立方体,鼠标移动时将鼠标位置转为3D场景中的坐标。
步骤:
1、粒子类Particle.cs
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public Point3D Position; //位置 public double Width; //长方体底面宽 public double Height; //长方体侧面高 |
2、粒子系统ParticleSystem.cs
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private readonly List<Particle> _particleList; private readonly GeometryModel3D _particleModel; private readonly int CUBOIDHEIGHT = 20; private readonly int MOUSERADIUS = 1000; private int XParticleCount; private int YParticleCount; public Model3D ParticleModel => _particleModel; public ParticleSystem( int amountX, int amountY, Color color) { XParticleCount = amountX; YParticleCount = amountY; _particleList = new List<Particle>(); _particleModel = new GeometryModel3D { Geometry = new MeshGeometry3D() }; var material = new DiffuseMaterial( new SolidColorBrush(color)); _particleModel.Material = material; } public void SpawnParticle( double size) { // 初始化粒子位置和大小 for ( int ix = 0; ix < XParticleCount; ix++) { for ( int iy = 0; iy < YParticleCount; iy++) { var p = new Particle { Position = new Point3D(ix * size, iy * size, 0), Width = size, Height = CUBOIDHEIGHT, }; _particleList.Add(p); } } } public void Update(Point mp) { foreach (var p in _particleList) { //求点到圆心的距离 double c = Math.Pow(Math.Pow(mp.X - p.Position.X, 2) + Math.Pow(mp.Y - p.Position.Y, 2), 0.5); p.Height = (MOUSERADIUS / (c + CUBOIDHEIGHT)) * CUBOIDHEIGHT; } UpdateGeometry(); } private void UpdateGeometry() { var positions = new Point3DCollection(); var indices = new Int32Collection(); for (var i = 0; i < _particleList.Count; ++i) { var positionIndex = i * 8; var p = _particleList[i]; var p1 = new Point3D(p.Position.X, p.Position.Y, p.Position.Z); var p2 = new Point3D(p.Position.X + p.Width, p.Position.Y, p.Position.Z); var p3 = new Point3D(p.Position.X + p.Width, p.Position.Y + p.Width, p.Position.Z); var p4 = new Point3D(p.Position.X, p.Position.Y + p.Width, p.Position.Z); var p5 = new Point3D(p.Position.X, p.Position.Y, p.Position.Z + p.Height); var p6 = new Point3D(p.Position.X + p.Width, p.Position.Y, p.Position.Z + p.Height); var p7 = new Point3D(p.Position.X + p.Width, p.Position.Y + p.Width, p.Position.Z + p.Height); var p8 = new Point3D(p.Position.X, p.Position.Y + p.Width, p.Position.Z + p.Height); positions.Add(p1); positions.Add(p2); positions.Add(p3); positions.Add(p4); positions.Add(p5); positions.Add(p6); positions.Add(p7); positions.Add(p8); indices.Add(positionIndex); indices.Add(positionIndex + 1); indices.Add(positionIndex + 3); indices.Add(positionIndex + 1); indices.Add(positionIndex + 2); indices.Add(positionIndex + 3); indices.Add(positionIndex); indices.Add(positionIndex + 4); indices.Add(positionIndex + 3); indices.Add(positionIndex + 4); indices.Add(positionIndex + 7); indices.Add(positionIndex + 3); indices.Add(positionIndex + 4); indices.Add(positionIndex + 6); indices.Add(positionIndex + 7); indices.Add(positionIndex + 4); indices.Add(positionIndex + 5); indices.Add(positionIndex + 6); indices.Add(positionIndex); indices.Add(positionIndex + 4); indices.Add(positionIndex + 1); indices.Add(positionIndex + 1); indices.Add(positionIndex + 4); indices.Add(positionIndex + 5); indices.Add(positionIndex + 1); indices.Add(positionIndex + 2); indices.Add(positionIndex + 6); indices.Add(positionIndex + 6); indices.Add(positionIndex + 5); indices.Add(positionIndex + 1); indices.Add(positionIndex + 2); indices.Add(positionIndex + 3); indices.Add(positionIndex + 7); indices.Add(positionIndex + 7); indices.Add(positionIndex + 6); indices.Add(positionIndex + 2); } ((MeshGeometry3D)_particleModel.Geometry).Positions = positions; ((MeshGeometry3D)_particleModel.Geometry).TriangleIndices = indices; } |
3、主窗体调用
xaml:
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< Grid x:Name = "mainGrid" Background = "#0D6589" > < Viewport3D Name = "myViewport" MouseLeave = "Grid_MouseLeave" MouseMove = "Grid_MouseMove" > < Viewport3D.Camera > < PerspectiveCamera Position = "-1500,3000,2200" LookDirection = "1,-1,-1" UpDirection = "0,0,1" /> </ Viewport3D.Camera > < Viewport3D.Children > < ModelVisual3D > < ModelVisual3D.Content > < Model3DGroup x:Name = "WorldModels" > < DirectionalLight Color = "White" Direction = "-1,-1,-3" /> </ Model3DGroup > </ ModelVisual3D.Content > </ ModelVisual3D > </ Viewport3D.Children > </ Viewport3D > </ Grid > |
交互逻辑:
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private readonly ParticleSystem _ps; private DispatcherTimer _frameTimer; private Point pMouse = new Point(9999, 9999); public MainWindow() { InitializeComponent(); _frameTimer = new DispatcherTimer(); _frameTimer.Tick += OnFrame; _frameTimer.Interval = TimeSpan.FromMilliseconds(100); _frameTimer.Start(); _ps = new ParticleSystem(30, 30, Colors.White); WorldModels.Children.Add(_ps.ParticleModel); _ps.SpawnParticle(50); KeyDown += Window_KeyDown; } private void Window_KeyDown( object sender, KeyEventArgs e) { if (e.Key == Key.Escape) Close(); } private void OnFrame( object sender, EventArgs e) { _ps.Update(pMouse); } private void Grid_MouseMove( object sender, MouseEventArgs e) { Point mouseposition = e.GetPosition(myViewport); PointHitTestParameters pointparams = new PointHitTestParameters(mouseposition); VisualTreeHelper.HitTest(myViewport, null , HTResult, pointparams); } /// <summary> /// 获取鼠标在场景中的3D坐标 /// </summary> public HitTestResultBehavior HTResult(System.Windows.Media.HitTestResult rawresult) { RayHitTestResult rayResult = rawresult as RayHitTestResult; if (rayResult != null ) { RayMeshGeometry3DHitTestResult rayMeshResult = rayResult as RayMeshGeometry3DHitTestResult; if (rayMeshResult != null ) { GeometryModel3D hitgeo = rayMeshResult.ModelHit as GeometryModel3D; MeshGeometry3D hitmesh = hitgeo.Geometry as MeshGeometry3D; Point3D p1 = hitmesh.Positions.ElementAt(rayMeshResult.VertexIndex1); double weight1 = rayMeshResult.VertexWeight1; Point3D p2 = hitmesh.Positions.ElementAt(rayMeshResult.VertexIndex2); double weight2 = rayMeshResult.VertexWeight2; Point3D p3 = hitmesh.Positions.ElementAt(rayMeshResult.VertexIndex3); double weight3 = rayMeshResult.VertexWeight3; Point3D prePoint = new Point3D(p1.X * weight1 + p2.X * weight2 + p3.X * weight3, p1.Y * weight1 + p2.Y * weight2 + p3.Y * weight3, p1.Z * weight1 + p2.Z * weight2 + p3.Z * weight3); pMouse = new Point(prePoint.X, prePoint.Y); } } return HitTestResultBehavior.Continue; } private void Grid_MouseLeave( object sender, MouseEventArgs e) { pMouse = new Point(9999, 9999); } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/dnazhd/article/details/108243041