在flash10中，I can轻松地在3D空间中围绕其中心旋转图像。
我的flash10示例位于[http://jsc.sourceforge.net/examples/web/MatrixStuffExample/Application.htm
（来源：sourceforge.net）
我想将此示例移植到WPF。
有没有示例如何在不使用XAML的情况下在C＃中的WPF中进行这种3D转换？
在Silverlight 3中，您将使用Matrix3DProjection。您将如何在WPF中实施？
参考方案
我已经建立了一个基本的薄立方体并将其旋转一圈，以便您可以看到转换如何通过C＃进行。
在xaml中设置视口
<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<StackPanel>
<Viewport3D Name="mainViewport" ClipToBounds="True" HorizontalAlignment="Stretch" Height="300">
<Viewport3D.Camera>
<PerspectiveCamera
LookDirection="0,0,-20"
UpDirection="0,1,0"
Position="0,0,50"
/>
</Viewport3D.Camera>
<ModelVisual3D>
<ModelVisual3D.Content>
<Model3DGroup x:Name="group3d">
<SpotLight Position="10,10,10" x:Name="mySpotLight" Color="Yellow" InnerConeAngle="15" OuterConeAngle="100" Range="100" />
</Model3DGroup>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D>
</StackPanel>
</Window>
这是后面的代码，转换是最后一种方法...希望对您有帮助...如果您需要更多信息，请大声疾呼！
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
Init();
}
private Timer _timer;
private ModelVisual3D _model = new ModelVisual3D();
private double _angle = 0;
public void Init()
{
_model = GetCube(GetSurfaceMaterial(Colors.Red), new Point3D(10, 10, 1), new Point3D(-10,-10,-1));
mainViewport.Children.Add(_model);
_timer = new Timer(10);
_timer.Elapsed += TimerElapsed;
_timer.Enabled = true;
}
void TimerElapsed(object sender, ElapsedEventArgs e)
{
Dispatcher.Invoke(DispatcherPriority.Normal, new Action<double>(Transform), 0.5d);
}
public MaterialGroup GetSurfaceMaterial(Color colour)
{
var materialGroup = new MaterialGroup();
var emmMat = new EmissiveMaterial(new SolidColorBrush(colour));
materialGroup.Children.Add(emmMat);
materialGroup.Children.Add(new DiffuseMaterial(new SolidColorBrush(colour)));
var specMat = new SpecularMaterial(new SolidColorBrush(Colors.White), 30);
materialGroup.Children.Add(specMat);
return materialGroup;
}
public ModelVisual3D GetCube(MaterialGroup materialGroup, Point3D nearPoint, Point3D farPoint)
{
var cube = new Model3DGroup();
var p0 = new Point3D(farPoint.X, farPoint.Y, farPoint.Z);
var p1 = new Point3D(nearPoint.X, farPoint.Y, farPoint.Z);
var p2 = new Point3D(nearPoint.X, farPoint.Y, nearPoint.Z);
var p3 = new Point3D(farPoint.X, farPoint.Y, nearPoint.Z);
var p4 = new Point3D(farPoint.X, nearPoint.Y, farPoint.Z);
var p5 = new Point3D(nearPoint.X, nearPoint.Y, farPoint.Z);
var p6 = new Point3D(nearPoint.X, nearPoint.Y, nearPoint.Z);
var p7 = new Point3D(farPoint.X, nearPoint.Y, nearPoint.Z);
//front side triangles
cube.Children.Add(CreateTriangleModel(materialGroup, p3, p2, p6));
cube.Children.Add(CreateTriangleModel(materialGroup, p3, p6, p7));
//right side triangles
cube.Children.Add(CreateTriangleModel(materialGroup, p2, p1, p5));
cube.Children.Add(CreateTriangleModel(materialGroup, p2, p5, p6));
//back side triangles
cube.Children.Add(CreateTriangleModel(materialGroup, p1, p0, p4));
cube.Children.Add(CreateTriangleModel(materialGroup, p1, p4, p5));
//left side triangles
cube.Children.Add(CreateTriangleModel(materialGroup, p0, p3, p7));
cube.Children.Add(CreateTriangleModel(materialGroup, p0, p7, p4));
//top side triangles
cube.Children.Add(CreateTriangleModel(materialGroup, p7, p6, p5));
cube.Children.Add(CreateTriangleModel(materialGroup, p7, p5, p4));
//bottom side triangles
cube.Children.Add(CreateTriangleModel(materialGroup, p2, p3, p0));
cube.Children.Add(CreateTriangleModel(materialGroup, p2, p0, p1));
var model = new ModelVisual3D();
model.Content = cube;
return model;
}
private Model3DGroup CreateTriangleModel(Material material, Point3D p0, Point3D p1, Point3D p2)
{
var mesh = new MeshGeometry3D();
mesh.Positions.Add(p0);
mesh.Positions.Add(p1);
mesh.Positions.Add(p2);
mesh.TriangleIndices.Add(0);
mesh.TriangleIndices.Add(1);
mesh.TriangleIndices.Add(2);
var normal = CalculateNormal(p0, p1, p2);
mesh.Normals.Add(normal);
mesh.Normals.Add(normal);
mesh.Normals.Add(normal);
var model = new GeometryModel3D(mesh, material);
var group = new Model3DGroup();
group.Children.Add(model);
return group;
}
private Vector3D CalculateNormal(Point3D p0, Point3D p1, Point3D p2)
{
var v0 = new Vector3D(p1.X - p0.X, p1.Y - p0.Y, p1.Z - p0.Z);
var v1 = new Vector3D(p2.X - p1.X, p2.Y - p1.Y, p2.Z - p1.Z);
return Vector3D.CrossProduct(v0, v1);
}
void Transform(double adjustBy)
{
_angle += adjustBy;
var rotateTransform3D = new RotateTransform3D {CenterX = 0, CenterZ = 0};
var axisAngleRotation3D = new AxisAngleRotation3D {Axis = new Vector3D(0, 1, 0), Angle = _angle};
rotateTransform3D.Rotation = axisAngleRotation3D;
var myTransform3DGroup = new Transform3DGroup();
myTransform3DGroup.Children.Add(rotateTransform3D);
_model.Transform = myTransform3DGroup;
}
}
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