c#绘制三维图形

在C#中绘制三维图形可以使用.NET Framework提供的Windows Presentation Foundation（WPF）或DirectX技术。

使用WPF，可以使用3D图形渲染器在XAML中创建和呈现3D图形。以下是一个简单的示例：

<Window x:Class="Wpf3DGraphics.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Viewport3D>
            <Viewport3D.Camera>
                <PerspectiveCamera Position="0,0,10" LookDirection="0,0,-1" UpDirection="0,1,0" />
            </Viewport3D.Camera>
            <ModelVisual3D>
                <ModelVisual3D.Content>
                    <Model3DGroup>
                        <AmbientLight Color="#FFFFFF" />
                        <GeometryModel3D>
                            <GeometryModel3D.Geometry>
                                <MeshGeometry3D Positions="0,1,0 1,-1,0 -1,-1,0" TriangleIndices="0 1 2" />
                            </GeometryModel3D.Geometry>
                            <GeometryModel3D.Material>
                                <DiffuseMaterial Brush="#FF0000" />
                            </GeometryModel3D.Material>
                        </GeometryModel3D>
                    </Model3DGroup>
                </ModelVisual3D.Content>
            </ModelVisual3D>
        </Viewport3D>
    </Grid>
</Window>

使用DirectX，可以使用SharpDX库封装DirectX API，以便在C#中使用。以下是一个简单的示例：

using System.Windows.Forms;
using SharpDX;
using SharpDX.Direct3D9;

namespace WinForms3DGraphics
{
    public partial class Form1 : Form
    {
        private Device _device;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            PresentParameters presentParameters = new PresentParameters
            {
                BackBufferFormat = Format.A8R8G8B8,
                SwapEffect = SwapEffect.Discard,
                DeviceWindowHandle = Handle,
                Windowed = true,
                BackBufferCount = 1
            };

            _device = new Device(new Direct3D(), 0, DeviceType.Hardware, Handle, CreateFlags.HardwareVertexProcessing, presentParameters);
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            _device.Clear(ClearFlags.Target, new ColorBGRA(0, 0, 255, 255), 1.0f, 0);

            _device.BeginScene();

            // 绘制3D图形

            _device.EndScene();

            _device.Present();
        }
    }
}

这里只是简单介绍了两种方法，具体实现取决于您的需求和技术水平。