DirextX编程

开发平台：
C#

DrawSphereClass.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.  //
////////////////////////////////////////////////////////////////////////
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 DrawSphereClass
    {
        /// <summary>
        /// <param name="device">device:设备对象</param>
        /// </summary>
        public Device device;//定义设备
        /// <summary>
        /// <param name="shpereCenterVectors">shpereCenterVectors:球心坐标</param>
        /// </summary>
        public Vector3 shpereCenterVectors;//定义球心坐标
        ///<summary>
        ///<param name="radius">radius:球体半径</param>
        ///</summary>
        public float radius;//定义球体半径
        /// <summary>
        /// <param name="mNumber">mNumber:球体在水平方向的分块数目</param>
        /// </summary>
        public int mNumber;//定义球体在水平方向的分块数目
        /// <summary>
        /// <param name="nNumber">nNumber:球体在竖直方向的分块数目</param>
        /// </summary>
        public int nNumber;//定义球体在竖直方向的分块数目
        private CustomVertex.PositionColored[] vertices;//定义球体网格顶点
        private int[] indexData;//定义球体网格中三角形索引
        /// <summary>
        /// 定义一个绘制球体对象
        /// </summary>
        /// <param name="_device">设备对象</param>
        /// <param name="_shpereCenterVectors">球心坐标</param>
        /// <param name="_radius">球体半径</param>
        /// <param name="_mNumber">球体在水平方向的分块数目</param>
        /// <param name="_nNumber">球体在竖直方向的分块数目</param>
        public DrawSphereClass(Device _device,Vector3 _shpereCenterVectors,float _radius,int _mNumber,int _nNumber)
        {
            device = _device;
            shpereCenterVectors = _shpereCenterVectors;
            radius = _radius;
            mNumber = _mNumber;
            nNumber = _nNumber;
            VertexDeclaration();//定义顶点
            IndicesDeclaration();//定义索引
        }
        private void VertexDeclaration()//定义顶点
        {
            vertices=new CustomVertex.PositionColored[(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)].Color = Color.Yellow.ToArgb();
                }
            }
        }
        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)+1;
                    indexData[6 * (j + i * mNumber) + 5] = j + (i + 1) * (mNumber + 1);
                }
            }
        }
        /// <summary>
        /// 绘制球体网格
        /// </summary>
        public void DrawSphere()
        {
            device.DrawIndexedUserPrimitives(PrimitiveType.TriangleList, 0, (mNumber+1) * (nNumber+1), 2 * mNumber * nNumber, indexData, false, vertices);
        }
    }
}

						