WPF 3D 贴图：为你的二次元老婆们做个3D画廊

文章目录

- WPF3D系列
- 为你的二次元老婆们做个3D画廊

WPF3D系列

💎WPF 3D初步|源码新建一个立方体并调整视角
相机控制：位置和视角的调节
- 💎键盘控制|源码
- 💎鼠标控制|源码
💎为你的二次元老婆们做个3D画廊|源码
💎用C#搓一个地球|源码
💎基础光效💎给地球点颜色看看
💎选中并挪动几何体

为你的二次元老婆们做个3D画廊

工程地址：二次元老婆们的画廊

接下来想做一个图廊，所以并没有必要用立方体，只需做一些“墙壁”就行了。
而在一个平面上建起另一个矩形的平面，实则非常容易，只需输入墙角的两点和高度就可以了，这对于写过正方体的人来说绝对是简单得很，无非是把四个点劈成两个三角形

private MeshGeometry3D MakeSurface(Point3D p0, Point3D p1, Point3D p2, Point3D p3)
{MeshGeometry3D mesh = new MeshGeometry3D();Point3D[] pts ={p0, p1, p2, p3};foreach (var pt in pts)mesh.Positions.Add(pt);foreach (var i in new int[6] { 0, 1, 2, 2, 3, 0 })mesh.TriangleIndices.Add(i);return mesh;
}

接下来可以像之前做正方体时那样，先做一个平的地面，然后在地面上放置一些正方体。

由于地面上的正方形要求垂直于地面，所以重载一下

private MeshGeometry3D MakeSurface(Point p0, Point p1, double high)
{return MakeSurface(new Point3D(p0.X, 0, p0.Y), new Point3D(p1.X, 0, p1.Y), new Point3D(p1.X, high, p1.Y), new Point3D(p0.X, high, p0.Y));
}

然后生成模型

在这里插入图片描述

代码为

private void DefineModel(Model3DGroup group)
{// Make the ground.const double wid = 10;MeshGeometry3D groundMesh = MakeSurface(new Point3D(-wid, 0, -wid),new Point3D(-wid, 0, +wid),new Point3D(+wid, 0, +wid),new Point3D(+wid, 0, -wid));DiffuseMaterial groundMaterial = new DiffuseMaterial(Brushes.DarkGray);GeometryModel3D groundModel = new GeometryModel3D(groundMesh, groundMaterial);group.Children.Add(groundModel);MaterialGroup gpMaterial;for (int x = -2; x <= 2; x += 2){for (int y = -2; y <= 2; y += 2){MeshGeometry3D mesh = MakeSurface(new Point(x, y), new Point(x, y + 1), 1);byte r = (byte)(128 + x * 50);byte g = (byte)(128 + y * 50);byte b = (byte)(128 + x * 50);Color color = Color.FromArgb(255, r, g, b);DiffuseMaterial material = new DiffuseMaterial(new SolidColorBrush(color));GeometryModel3D model = new GeometryModel3D(mesh, material);group.Children.Add(model);}}
}

接下来就是挂载贴图，结果大致如下

在这里插入图片描述

其方法也很简单，就是把material变成想要的图片，故而先把图像放在一个字符串数组里

static readonly string[] imgs = new string[9]
{"2d1.png","2d2.png","2d3.png","2d4.png","2d5.png","2d6.png","2d7.png","2d8.png","2d9.png"
};

接下来需要注意一点，图像本身需要一个坐标系，故而要把墙壁的代码改为

private MeshGeometry3D MakeSurface(Point p0, Point p1, double high, string uri = null)
{var mesh = MakeSurface(new Point3D(p0.X, 0, p0.Y), new Point3D(p1.X, 0, p1.Y), new Point3D(p1.X, high, p1.Y), new Point3D(p0.X, high, p0.Y));//这四个点代表图像上的坐标和图形中点的对应关系Point[] textureCoods = new Point[4]{new Point(0, 1),new Point(1, 1),new Point(1, 0),new Point(0, 0),};foreach (var pt  in textureCoods)mesh.TextureCoordinates.Add(pt);return mesh;
}

然后在生成正方形时，用图像取代颜色

ImageBrush imgBrush = new ImageBrush();
imgBrush.ImageSource = new BitmapImage(new Uri($"imgs//{imgs[k++]}", UriKind.Relative));MeshGeometry3D mesh = MakeSurface(new Point(x, y), new Point(x, y + 1), 1);GeometryModel3D model = new GeometryModel3D(mesh, new DiffuseMaterial(imgBrush));
group.Children.Add(model);