Lesson 9 Nehe-白红宇

Lesson 9 Nehe

阅读量：6921 次

发布时间：2019-06-27

本文共 2737 字，大约阅读时间需要 9 分钟。

#include 
     
      #include 
      
       HGLRC hRC = NULL;HDC   hDC = NULL;HWND  hWnd = NULL;HINSTANCE hInstance = NULL;BOOL keys[256];BOOL active = TRUE;BOOL fullscreen = FALSE;BOOL twinkle = FALSE;           // 星星是否闪烁BOOL tp = FALSE;                // t 键是否按下const int num = 50;             // 星星的数目// 星星的结构typedef struct{    int r, g, b;    GLfloat dist;    GLfloat angle;}stars;// 定义50个星星stars star[num];        GLfloat zoom = -15.0f;      // 星星离观察者的距离GLfloat title = 90.0f;      // 星星的倾角GLfloat spin;               // 闪烁星星的自转GLuint loop;                // 循环变量GLuint texture[1];              // 存一个纹理LRESULT CALLBACK WindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);AUX_RGBImageRec* LoadBMP(char* FileName){    FILE *File = NULL;    if (!FileName){        MessageBox(NULL, "文件未存在", "错误", MB_OK|MB_ICONEXCLAMATION);        return NULL;    }    File = fopen(FileName, "r");    if (!File){        MessageBox(NULL, "文件未能正常打开", "错误", MB_OK|MB_ICONEXCLAMATION);        return  NULL;    }    fclose(File);    return auxDIBImageLoad(FileName);}BOOL LoadGLTexture(char* Filename, GLuint* texture){    BOOL Status  =  FALSE;    AUX_RGBImageRec *TextureImage[1];    memset(TextureImage, 0, sizeof(void*)*1);    if (TextureImage[0] = LoadBMP(Filename)){        Status = TRUE;        // 创建一个纹理        glGenTextures(1, texture);        glBindTexture(GL_TEXTURE_2D, *texture);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);        glTexImage2D(GL_TEXTURE_2D,  0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);    }    if (TextureImage[0]){        if (TextureImage[0]->data)            free(TextureImage[0]->data);        free(TextureImage[0]);    }    return Status;}GLvoid ReSizeGLScene(GLsizei width, GLsizei height){    // 如果高为0 ， 则设置其为1    if (height == 0) height = 1;    // 设置可以看到的视角    glViewport(0,0,width, height);    // 设置投影矩阵    glMatrixMode(GL_PROJECTION);    glLoadIdentity();    // 设置平截头体    gluPerspective(45.0f, (GLdouble)width/(GLdouble)height, 0.1f, 100.0f);    // 设置模型矩阵    glMatrixMode(GL_MODELVIEW);    glLoadIdentity();}GLvoid InitGL(){    if (!LoadGLTexture("Data/Star.bmp", &texture[0])){        MessageBox(NULL, "载入纹理失败", "错误", MB_OK|MB_ICONEXCLAMATION);        exit(1);    }    glEnable(GL_TEXTURE_2D);    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);    glShadeModel(GL_SMOOTH);    //glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);    // 设置颜色混合    glBlendFunc(GL_SRC_ALPHA, GL_ONE);    glEnable(GL_BLEND);    glMatrixMode(GL_MODELVIEW);    glLoadIdentity();    // 星星属性设置    for (loop=1; loop

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