DirextX编程

开发平台：
C#

DrawEarthClass.cs：源码内容
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// Copyright (c) 三峡大学水利与环境学院 肖泽云. All rights reserved.  //
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using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
namespace 绘制基本几何体
{
    class DrawEarthClass
    {
        public Device device;
        public Vector3 shpereCenterVectors;
        public float radius;
        public int mNumber;
        public int nNumber;
        private CustomVertex.PositionTextured[] vertices;
        private Texture texture;//定义贴图变量
        private Material material;//定义材质变量
        private int[] indexData;
        public DrawEarthClass(Device _device, Vector3 _shpereCenterVectors, float _radius, int _mNumber, int _nNumber)
        {
            device = _device;
            shpereCenterVectors = _shpereCenterVectors;
            radius = _radius;
            mNumber = _mNumber;
            nNumber = _nNumber;
            VertexDeclaration();
            IndicesDeclaration();
            LoadTexturesAndMaterials();
        }
        private void VertexDeclaration()//定义顶点
        {
            vertices=new CustomVertex.PositionTextured[(mNumber+1)*(nNumber+1)];
            float theta = (float)Math.PI / nNumber;
            float alpha = 2 * (float)Math.PI / mNumber;
            for (int i = 0; i < nNumber+1; i++)
            {
                for (int j = 0; j < mNumber+1; j++)
                {
                    vertices[j + i * (mNumber + 1)].X = shpereCenterVectors.X + radius * (float)Math.Sin(i*theta) * (float)Math.Cos(j*alpha);
                    vertices[j + i * (mNumber + 1)].Y = shpereCenterVectors.Y + radius * (float)Math.Cos(i * theta);
                    vertices[j + i * (mNumber + 1)].Z = shpereCenterVectors.Z + radius * (float)Math.Sin(i * theta) * (float)Math.Sin(j*alpha);
                    vertices[j + i * (mNumber + 1)].Tu = (float)j / (mNumber + 1);
                    vertices[j + i * (mNumber + 1)].Tv = (float)i / (nNumber + 1);
                }
            }
        }
        private void IndicesDeclaration()//定义索引
        {
            indexData=new int[6*mNumber*nNumber];
            for (int i = 0; i < nNumber; i++)
            {
                for (int j = 0; j < mNumber; j++)
                {
                    indexData[6 * (j + i * mNumber)] = j + i * (mNumber + 1);
                    indexData[6 * (j + i * mNumber) + 1] = j + i * (mNumber + 1)+1;
                    indexData[6 * (j + i * mNumber) + 2] = j + (i + 1) * (mNumber + 1);
                    indexData[6 * (j + i * mNumber) + 3] = j + i * (mNumber + 1) + 1;
                    indexData[6 * (j + i * mNumber) + 4] = j + (i + 1) * (mNumber + 1);
                    indexData[6 * (j + i * mNumber) + 5] = j + (i + 1) * (mNumber + 1)+1;
                }
            }
        }
        private void LoadTexturesAndMaterials()//导入贴图和材质
        {
            material = new Material();
            material.Diffuse = Color.White;
            material.Specular = Color.LightGray;
            material.SpecularSharpness = 15.0F;
            device.Material = material;
            texture = TextureLoader.FromFile(device, @"E:DirectXDirectX_C#Mediaworld.jpg");
        }
        public void DrawSphere()
        {
            device.SetTexture(0, texture);//设置贴图
            device.VertexFormat = CustomVertex.PositionTextured.Format;
            device.DrawIndexedUserPrimitives(PrimitiveType.TriangleList, 0, (mNumber+1) * (nNumber+1), 2 * mNumber * nNumber, indexData, false, vertices);
        }
    }
}

						