TextureCoordinates定义了如何将一副2D纹理映射到所建立的3D网格上，TextureCoordinates为Positions集合中的每一个3D顶点提供了一个2D顶点。
映射时方向确定比较麻烦，需要3D每个面映射都为正确的方向，在baidu上找了很多，映射基本是乱的。
通过归纳测试，有了准确的参数，需要的可参考使用，不必再费劲计算。
里面注销掉的部分，可以恢复并注销调自动转动部分，为手动点击对象转动。
通过VisualBrush写入的 image可以换为UserControl等组件。
代码不长，就100多行，仅供参考，如有错误，自行修正。
MainWindow.xaml
<Window x:Class="Test3.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Title="MainWindow" Height="768" Width="1024">
<Grid x:Name="main">
<Button Content="纵向" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
<Button Content="横向" HorizontalAlignment="Left" Margin="10,48,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_1"/>
<Button Content="纵横" HorizontalAlignment="Left" Margin="10,85.74,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_2"/>
<Button Content="横纵" HorizontalAlignment="Left" Margin="10,124.5,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_3"/>
</Grid>
</Window>
MainWindow.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Media.Media3D;
namespace Test3
{
public partial class MainWindow : Window
{
private AxisAngleRotation3D axisAngleRotation3D;
public MainWindow()
{
InitializeComponent();
main.MouseDown += Main_MouseDown;
init_draw();
}
public void init_draw()
{
Point3DCollection[] positions = new Point3DCollection[6]
{
new Point3DCollection(new Point3D[] {
new Point3D(0.5, 0.5, -0.5), new Point3D(- 0.5, 0.5, -0.5), new Point3D(- 0.5, 0.5, 0.5),
new Point3D(- 0.5, 0.5, 0.5),new Point3D(0.5, 0.5, 0.5), new Point3D(0.5, 0.5, -0.5)
}),
new Point3DCollection(new Point3D[] {
new Point3D(-0.5,0.5,-0.5),new Point3D(-0.5,-0.5,-0.5), new Point3D(-0.5,-0.5,0.5),
new Point3D(-0.5,-0.5,0.5),new Point3D(-0.5,0.5,0.5),new Point3D(-0.5,0.5,-0.5)
}),
new Point3DCollection(new Point3D[] {
new Point3D(-0.5,-0.5,0.5),new Point3D(0.5,-0.5,0.5),new Point3D(0.5,0.5,0.5),
new Point3D(0.5,0.5,0.5),new Point3D(-0.5,0.5,0.5), new Point3D(-0.5,-0.5,0.5)
}),
new Point3DCollection( new Point3D[] {
new Point3D(-0.5,-0.5,-0.5),new Point3D(-0.5,0.5,-0.5),new Point3D(0.5,0.5,-0.5),
new Point3D(0.5,0.5,-0.5), new Point3D(0.5,-0.5,-0.5),new Point3D(-0.5,-0.5,-0.5)
}),
new Point3DCollection( new Point3D[] {
new Point3D(-0.5,-0.5,-0.5), new Point3D(0.5,-0.5,-0.5), new Point3D(0.5,-0.5,0.5),
new Point3D(0.5,-0.5,0.5),new Point3D(-0.5,-0.5,0.5), new Point3D(-0.5,-0.5,-0.5)
}),
new Point3DCollection( new Point3D[] {
new Point3D(0.5,-0.5,-0.5),new Point3D(0.5,0.5,-0.5),new Point3D(0.5,0.5,0.5),
new Point3D(0.5,0.5,0.5), new Point3D(0.5,-0.5,0.5), new Point3D(0.5,-0.5,-0.5)
})
};
PointCollection[] texturepoints = new PointCollection[6]
{
new PointCollection {new Point(1,0), new Point(0,0), new Point(0,1), new Point(0,1), new Point(1,1),new Point(1,0) },
new PointCollection { new Point(0,0),new Point(0,1),new Point(1,1), new Point(1,1),new Point(1,0),new Point(0,0) },
new PointCollection { new Point(0,1), new Point(1,1),new Point(1,0), new Point(1,0),new Point(0,0),new Point(0,1) },
new PointCollection { new Point(1,1), new Point(1,0),new Point(0,0), new Point(0,0), new Point(0,1), new Point(1,1) },
new PointCollection { new Point(0,1), new Point(1,1), new Point(1,0),new Point(1,0), new Point(0,0), new Point(0,1)},
new PointCollection{ new Point(1,1), new Point(1,0),new Point(0,0),new Point(0,0), new Point(0,1),new Point(1,1)}
};
string[] filename = new string[6] //430251
{
"pack://application:,,,/Images/4.jpg",
"pack://application:,,,/Images/3.jpg",
"pack://application:,,,/Images/0.jpg",
"pack://application:,,,/Images/2.jpg",
"pack://application:,,,/Images/5.jpg",
"pack://application:,,,/Images/1.jpg"
};
Viewport3D viewport3D = new Viewport3D();
PerspectiveCamera perspectiveCamera = new PerspectiveCamera()
{
Position = new Point3D(0, 0, 3),
LookDirection = new Vector3D(0, 0, -3),
FieldOfView = 50,
UpDirection = new Vector3D(0, 1, 0),
FarPlaneDistance = 20,
NearPlaneDistance = 0,
};
viewport3D.Camera = perspectiveCamera;
ModelVisual3D modelVisual3D = new ModelVisual3D();
Model3DGroup model3DGroup = new Model3DGroup();
for (int i = 0; i < 6; i++)
{
GeometryModel3D geometryModel3D = new GeometryModel3D();
DiffuseMaterial diffuse = new DiffuseMaterial();
VisualBrush visualBrush = new VisualBrush();
Image image = new Image();
image.Source = new BitmapImage(new Uri(filename[i]));
visualBrush.Visual = image;
diffuse.Brush = visualBrush;
geometryModel3D.Material = diffuse;
MeshGeometry3D meshGeometry3D = new MeshGeometry3D()
{
Positions = positions[i],
TextureCoordinates = texturepoints[i],
};
geometryModel3D.Geometry = meshGeometry3D;
model3DGroup.Children.Add(geometryModel3D);
}
AmbientLight ambientLight = new AmbientLight();
model3DGroup.Children.Add(ambientLight);
modelVisual3D.Content = model3DGroup;
viewport3D.Children.Add(modelVisual3D);
main.Children.Add(viewport3D);
/*
axisAngleRotation3D = new AxisAngleRotation3D(new Vector3D(1, 1, 0), 0);
RotateTransform3D rotateTransform3D = new RotateTransform3D(axisAngleRotation3D);
rotateTransform3D.Rotation = axisAngleRotation3D;
modelVisual3D.Transform = rotateTransform3D;
*/
// 如恢复上面，以下可以注销
axisAngleRotation3D = new AxisAngleRotation3D(new Vector3D(0, 1, 0), 0);
RotateTransform3D rotate = new RotateTransform3D(axisAngleRotation3D);
modelVisual3D.Transform = rotate;
DoubleAnimation animation = new DoubleAnimation();
animation.From = 0;
animation.To = 360;
animation.Duration = new Duration(TimeSpan.FromSeconds(10.0));
animation.RepeatBehavior = RepeatBehavior.Forever;
NameScope.SetNameScope(main, new NameScope());
main.RegisterName("cubeaxis", axisAngleRotation3D);
Storyboard.SetTargetName(animation, "cubeaxis");
Storyboard.SetTargetProperty(animation, new PropertyPath(AxisAngleRotation3D.AngleProperty));
Storyboard RotCube = new Storyboard();
RotCube.Children.Add(animation);
RotCube.Begin(main);
}
double tmp = 0;
private void Main_MouseDown(object sender, MouseButtonEventArgs e)
{
// 点击对象手动转动
/*
tmp = axisAngleRotation3D.Angle;
if (e.LeftButton == MouseButtonState.Pressed)
{
tmp -= 5;
}
if (e.RightButton == MouseButtonState.Pressed)
{
tmp += 5;
}
axisAngleRotation3D.Angle = tmp;
*/
}
private void Button_Click(object sender, RoutedEventArgs e)
{
axisAngleRotation3D.Axis = new Vector3D(1,0,0);
axisAngleRotation3D.Angle = 0;
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
axisAngleRotation3D.Axis = new Vector3D(0,1,0);
axisAngleRotation3D.Angle = 0;
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
axisAngleRotation3D.Axis = new Vector3D(1, 1, 0);
axisAngleRotation3D.Angle = 0;
}
private void Button_Click_3(object sender, RoutedEventArgs e)
{
axisAngleRotation3D.Axis = new Vector3D(0, 1, 1);
axisAngleRotation3D.Angle = 0;
}
}
}