openGL三维网格坐标，旋转，缩放，灯光设置，纹理读取，模型读取（MFC单文档）

来源：互联网发布：串口摄像头调试软件编辑：程序博客网时间：2024/06/10 05:15

openGL三维网格坐标，旋转，缩放，灯光设置，纹理读取，模型读取（MFC单文档）

源码下载链接：链接：http://pan.baidu.com/s/1slANShZ 密码：hbwj

1.三维网格坐标建立
2.基本3维图形创建
3.鼠标相应旋转缩放
4.键盘相应旋转缩放
5.灯光设置
6.纹理载入映射
7.读取模型

关于MFC配置编写openGL网上有很多教程
需要的函数创建一般是：

OnCreat()
OnDestroy()
Onsize()
PreCreateWindow()
OnDraw()

这里写图片描述

在我的MFC单文档项目中enableview.h和enableview.cpp负责上面的窗口建立，myopenglview.h和myopenglView.cpp主要是功能的实现

1.三维网格建立：
这里写图片描述

void GLGrid(float pt1x, float pt1y, float pt1z, float pt2x, float pt2y, float pt2z, int num){    const float _xLen = (pt2x - pt1x) / num;    const float _yLen = (pt2y - pt1y) / num;    const float _zLen = (pt2z - pt1z) / num;    glLineWidth(2.f);    glLineStipple(1, 0x0303);//线条样式    glBegin(GL_LINES);    glEnable(GL_LINE_SMOOTH);    int xi = 0;    int yi = 0;    int zi = 0;    //绘制平行于X的直线    for (zi = 0; zi <= num; zi++)    {        float z = _zLen * zi + pt1z;        for (yi = 0; yi <= num; yi++)        {            float y = _yLen * yi + pt1y;            glVertex3f(pt1x, y, z);            glVertex3f(pt2x, y, z);        }    }    //绘制平行于Y的直线    for (zi = 0; zi <= num; zi++)    {        float z = _zLen * zi + pt1z;        for (xi = 0; xi <= num; xi++)        {            float x = _xLen * xi + pt1x;            glVertex3f(x, pt1y, z);            glVertex3f(x, pt2y, z);        }    }    //绘制平行于Z的直线    for (yi = 0; yi <= num; yi++)    {        float y = _yLen * yi + pt1y;        for (xi = 0; xi <= num; xi++)        {            float x = _xLen * xi + pt1x;            glVertex3f(x, y, pt1z);            glVertex3f(x, y, pt2z);        }    }    glEnd();}void CmyopenglView::ordination() {    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);    glEnable(GL_BLEND);    glEnable(GL_POINT_SMOOTH);                   //设置反走样    glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);       //设置反走样    glEnable(GL_LINE_SMOOTH);    glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);    glEnable(GL_POLYGON_SMOOTH);    glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST);    glRotatef(-45, 0.0, 1.0, 0.0);    //网格    glPushMatrix();    glColor3f(0.9f, 0.9f, 0.9f);    glTranslatef(-4, -4, -4);    GLGrid(0,0,0,8,0,8,20);    glPopMatrix();    glPushMatrix();    glTranslated(-4,4, -4);    glRotatef(90, 1.0, 0.0, 0.0);    glColor3f(0.9f, 0.9f, 0.0f);    GLGrid(0, 0, 0, 8, 0, 8, 20);    glPopMatrix();    glPushMatrix();    glTranslatef(-4, -4, -4);    glRotatef(90, 0.0, 0.0, 1.0);    glColor3f(0.0f, 0.9f, 0.0f);    GLGrid(0, 0, 0, 8, 0, 8, 20);    glPopMatrix();    glDisable(GL_BLEND);    glDisable(GL_LINE_SMOOTH);    glDisable(GL_POINT_SMOOTH);    glDisable(GL_POLYGON_SMOOTH);}1
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我们在ordination（）函数中增加绘制x,y,z坐标的代码

void CmyopenglView::ordination() {    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);    glEnable(GL_BLEND);    glEnable(GL_POINT_SMOOTH);                   //设置反走样    glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);       //设置反走样    glEnable(GL_LINE_SMOOTH);    glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);    glEnable(GL_POLYGON_SMOOTH);    glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST);    glRotatef(-45, 0.0, 1.0, 0.0);    //网格    glPushMatrix();    glColor3f(0.9f, 0.9f, 0.9f);    glTranslatef(-4, -4, -4);    GLGrid(0,0,0,8,0,8,20);    glPopMatrix();    glPushMatrix();    glTranslated(-4,4, -4);    glRotatef(90, 1.0, 0.0, 0.0);    glColor3f(0.9f, 0.9f, 0.0f);    GLGrid(0, 0, 0, 8, 0, 8, 20);    glPopMatrix();    glPushMatrix();    glTranslatef(-4, -4, -4);    glRotatef(90, 0.0, 0.0, 1.0);    glColor3f(0.0f, 0.9f, 0.0f);    GLGrid(0, 0, 0, 8, 0, 8, 20);    glPopMatrix();    //x    //glTranslatef(-2, -2, -2);    glColor3f(1.0f, 0.0f, 0.0f);    glBegin(GL_LINES);    glVertex3f(0.0f, 0.0f, 0.0f);    glVertex3f(3.5, 0.0f, 0.0f);    glEnd();    glPushMatrix();    glTranslatef(3.5, 0.0f, 0.0f);    glRotatef(90.0f, 0.0f, 1.0f, 0.0f);    glutWireCone(0.027, 0.09, 10, 10);    glPopMatrix();    //y    glColor3f(0.0f, 1.0f, 0.0f);    glBegin(GL_LINES);    glVertex3f(0.0f, 0.0f, 0.0f);    glVertex3f(0.0, 3.5, 0.0f);    glEnd();    glPushMatrix();    glTranslatef(0.0, 3.5, 0.0f);    glRotatef(90.0f, -1.0f, 0.0f, 0.0f);    glutWireCone(0.027, 0.09, 10, 10);    glPopMatrix();    //z    glColor3f(0.0f, 0.0f, 1.0f);    glBegin(GL_LINES);    glVertex3f(0.0f, 0.0f, 0.0f);    glVertex3f(0.0, 0.0f, 3.5);    glEnd();    glPushMatrix();    glTranslatef(0.0, 0.0f, 3.5);    glRotatef(90.0f, 0.0f, 0.0f, 1.0f);    glutWireCone(0.027, 0.09, 10, 10);    glPopMatrix();    glDisable(GL_BLEND);    glDisable(GL_LINE_SMOOTH);    glDisable(GL_POINT_SMOOTH);    glDisable(GL_POLYGON_SMOOTH);}1
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这里写图片描述

2.基本三维图形创建
点模型/线模型/面模型

glColor3f(1.0f, 1.0f, 1.0f);    if (model == 1)    {        if (type == 1)            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);        if (type == 2)            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);        if (type == 3)            glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);        auxSolidCube(4);    }    if (model == 2)    {        if (type == 1)            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);        if (type == 2)            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);              if(type == 3)            glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);        auxSolidSphere(3.0);    }    if (model == 3)    {        glPushMatrix();        glRotatef(90, -1.0, 0.0, 0.0);        if (type == 1)            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);        if (type == 2)            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);        if (type == 3)            glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);        glutSolidCone(3, 3, 100, 100);        glPopMatrix();    }    if (model == 4)    {        if (type == 1)            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);        if (type == 2)            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);        if (type == 3)            glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);        glutSolidTeapot(2.5);    }1
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这里写图片描述

3.鼠标相应旋转缩放

BOOL enableview::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt){    // TODO: 在此添加消息处理程序代码和/或调用默认值    double a = zDelta / 120;    if ((scale + a * 0.1)  <  10)        scale += a * 0.1;    this->InvalidateRect(NULL, FALSE);    return CView::OnMouseWheel(nFlags, zDelta, pt);}void enableview::OnMouseMove(UINT nFlags, CPoint point){    // TODO: 在此添加消息处理程序代码和/或调用默认值    if (nFlags & MK_LBUTTON == TRUE) {        //MessageBox("mouse move function triggered!", "attentino", MB_OK);        du += point.x - oldmx;              //鼠标在窗口x轴方向上的增量加到视点绕y轴的角度上，这样就左右转了        h += 0.03f*(point.y - oldmy);       //鼠标在窗口y轴方向上的改变加到视点的y坐标上，就上下转了        if (h>15.0f) h = 15.0f;             //视点y坐标作一些限制，不会使视点太奇怪        else if (h<-5.0f) h = -5.0f;        oldmx = point.x, oldmy = point.y;   //把此时的鼠标坐标作为旧值，为下一次计算增量做准备                                            /*CString debug;                                            debug.Format(_T("h,du= %0.3f %3d\n"), h, du);                                            OutputDebugString(debug);*/                                            //OnPaint();        this->OnDraw(this->GetDC());    //重绘界面    }    else if (nFlags & MK_RBUTTON == TRUE)    {        oldmx += point.x - oldmx;        oldmy += point.y - oldmy;        glTranslatef(oldmx, oldmy, -0.1f);        this->OnDraw(this->GetDC());        oldmx = point.x, oldmy = point.y;    }    else {        oldmx = point.x, oldmy = point.y;        //OutputDebugString(_T("mouse up\n"));    }    //CView::OnMouseMove(nFlags, point);}1
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4.键盘相应旋转缩放

BOOL CmyopenglView::PreTranslateMessage(MSG* pMsg){    if (pMsg->message == WM_KEYDOWN)  // If a keydown message    {        if (pMsg->wParam == _T('W'))        {            this->rotate_x += 6.0;            if (this->rotate_x > 360)this->rotate_x = -360;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('X'))        {            this->rotate_x += 6.0;            if (this->rotate_x < -360)this->rotate_x = 360;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('A'))        {            this->rotate_y -= 6.0;            if (this->rotate_y < -360)this->rotate_y = 360;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('D'))        {            this->rotate_y += 6.0;            if (this->rotate_y > 360)this->rotate_y = -360;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('Z'))        {            this->rotate_z -= 6.0;            if (this->rotate_z < -360)this->rotate_z = 360;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('E'))        {            this->rotate_z += 6.0;            if (this->rotate_z > 360)this->rotate_z = -360;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('Q'))        {            if ((scale + 2)  <  10)                scale += 2;            this->InvalidateRect(NULL, FALSE);        }        if (pMsg->wParam == _T('R'))        {                scale -= 2;            this->InvalidateRect(NULL, FALSE);        }    }    return CView::PreTranslateMessage(pMsg);}1
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这里写图片描述

5.灯光设置：
单方位灯光/多方位光/多种类型光效果

// 设置材质颜色GLfloat mat_ambient[] = { 0.6f, 0.6f, 0.6f, 1.0f };                     // 蓝色的材质环境光GLfloat mat_diffuse[] = { 0.6f, 0.6f, 0.9f, 1.0f };                     // 蓝色的材质漫反射光GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };                    // 全白色的材质镜面反射光GLfloat mat_emission[] = { 0.5f, 0.5f, 0.5f, 1.0f };                    // 淡白色的材质辐射光GLfloat no_mat[] = { 0.0f, 0.0f, 0.0f, 1.0f };                          // 无光(黑色光),用于关闭某种属性光时应用GLfloat no_shininess[] = { 0.0f };                                      // 无镜面反射GLfloat low_shininess[] = { 5.0f };                                     // 低镜面反射指数GLfloat high_shininess[] = { 70.0f };                                   // 高镜面反射指数1
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void CmyopenglView::InitalLigt(){    GLfloat light_position1[4] = { -52, -16, -50, 0 };    GLfloat light_position2[4] = { -26, -48, -50, 0 };    GLfloat light_position3[4] = { 16, -52, -50, 0 };    GLfloat direction1[3] = { 52, 16, 50 };    GLfloat direction2[3] = { 26, 48, 50 };    GLfloat direction3[3] = { -16, 52, 50 };    GLfloat light_position4[4] = { 52, 16, 50, 0 };    GLfloat light_position5[4] = { 26, 48, 50, 0 };    GLfloat light_position6[4] = { -16, 52, 50, 0 };    GLfloat direction4[3] = { -52, -16, -50 };    GLfloat direction5[3] = { -26, -48, -50 };    GLfloat direction6[3] = { 16, -52, -50 };    GLfloat color1[4], color2[4], color3[4], color4[4], color5[4], color6[4];    glClearColor(1, 1, 1, 0);    glEnable(GL_DEPTH_TEST);    glDepthFunc(GL_LESS);    if (color_type == 0) {  //彩色灯光        color1[0] = 1; color1[1] = 0; color1[2] = 0; color1[3] = 1;        color2[0] = 0.5; color2[1] = 1; color2[2] = 0; color2[3] = 1;        color3[0] = 0; color3[1] = 0; color3[2] = 1; color3[3] = 1;        color4[0] = 1; color4[1] = 0; color4[2] = 0; color4[3] = 1;        color5[0] = 0.5; color5[1] = 1; color5[2] = 0; color5[3] = 1;        color6[0] = 0; color6[1] = 0; color6[2] = 1; color6[3] = 1;        GLfloat ambient[4] = { 0.3f, 0.3f, 0.3f, 1.0f };        GLfloat material_color[4] = { 1, 1, 1, 0.5f };        GLfloat material_specular[4] = { 0.5f, 0.5f, 0.5f, 0.5f };        GLfloat material_ambient[4] = { 0.0, 0.0, 0.0, 0.0 };        glLightfv(GL_LIGHT3, GL_POSITION, light_position4);        glLightfv(GL_LIGHT3, GL_SPOT_DIRECTION, direction4);        glLightfv(GL_LIGHT3, GL_DIFFUSE, color4);        glLightfv(GL_LIGHT3, GL_SPECULAR, color4);        glLightfv(GL_LIGHT4, GL_POSITION, light_position5);        glLightfv(GL_LIGHT4, GL_SPOT_DIRECTION, direction5);        glLightfv(GL_LIGHT4, GL_DIFFUSE, color5);        glLightfv(GL_LIGHT4, GL_SPECULAR, color5);        glLightfv(GL_LIGHT5, GL_POSITION, light_position6);        glLightfv(GL_LIGHT5, GL_SPOT_DIRECTION, direction6);        glLightfv(GL_LIGHT5, GL_DIFFUSE, color6);        glLightfv(GL_LIGHT5, GL_SPECULAR, color6);        glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, material_specular);        glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, material_color);        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, material_ambient);        glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 128);        glDisable(GL_LIGHT0);        glDisable(GL_LIGHTING);        glEnable(GL_LIGHTING);        glEnable(GL_LIGHT3);        glEnable(GL_LIGHT4);        glEnable(GL_LIGHT5);        glDisable(GL_COLOR_MATERIAL);        return;    }    if (color_type == 1)    {        //白色灯光        glDisable(GL_LIGHT3);        glDisable(GL_LIGHT4);        glDisable(GL_LIGHT5);        glDisable(GL_LIGHTING);        GLfloat m_LightPostion[4] = { 0.0f, 10.0f, 10.0f, 1.0f };        GLfloat ambientLight[] = { 0.25f, 0.25f, 0.25f, 1.0f };        GLfloat diffuseLight[] = { 0.5, 0.5f, 0.5f, 1.0f };        GLfloat specularLight[] = { 0.5f, 0.5f, 0.5f, 1.0f };        glEnable(GL_LIGHTING);        glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);        glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);        glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);        glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);        glLightfv(GL_LIGHT0, GL_POSITION, m_LightPostion);        glEnable(GL_LIGHT0);        glEnable(GL_COLOR_MATERIAL);        glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);    }    else {        glDisable(GL_LIGHT3);        glDisable(GL_LIGHT4);        glDisable(GL_LIGHT5);        glDisable(GL_LIGHTING);        glDisable(GL_COLOR_MATERIAL);        glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);        //glDisable(GL_LIGHTING);        GLfloat no_ambientLight[] = { 0.0f, 0.0f, 0.0f, 1.0f };                 // 用于关掉默认的全局环境光                                                                                // 设置光源的颜色        GLfloat ambientLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };                    // 白色环境光        GLfloat diffuseLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };                    // 白色漫射光        GLfloat specularLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };                   // 白色镜面反射光        GLfloat m_LightPostion[] = { 0.0f, 0.0f, 1.0f, 0.0f };                  // 光源起始位置        // 1.仅漫射光        if (color_type == 12) {            glEnable(GL_LIGHTING);            //glLightModelfv(GL_LIGHT_MODEL_AMBIENT, no_ambientLight);          // 关掉默认的全局环境光            glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);            glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);            glLightfv(GL_LIGHT0, GL_POSITION, m_LightPostion);            glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);                 // 关闭材质的环境反射光颜色            glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);            // 设置mat_diffuse的材质漫反射光            glMaterialfv(GL_FRONT, GL_SPECULAR, no_mat);                // 关闭材质的镜面反射光颜色            glMaterialfv(GL_FRONT, GL_SHININESS, no_shininess);         // 设置材质的镜面反射指数为0            glMaterialfv(GL_FRONT, GL_EMISSION, no_mat);                // 关闭材质的辐射光            glEnable(GL_LIGHT0);        }        // 2.仅镜面光        if (color_type == 13) {            glEnable(GL_LIGHTING);            //glLightModelfv(GL_LIGHT_MODEL_AMBIENT, no_ambientLight);          // 关掉默认的全局环境光            glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);            glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);            glLightfv(GL_LIGHT0, GL_POSITION, m_LightPostion);            glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);            glMaterialfv(GL_FRONT, GL_DIFFUSE, no_mat);            glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);            glMaterialfv(GL_FRONT, GL_SHININESS, low_shininess);            glMaterialfv(GL_FRONT, GL_EMISSION, no_mat);            glEnable(GL_LIGHT0);        }        // 3.漫射光与低镜面光        if (color_type == 16) {            glEnable(GL_LIGHTING);            glLightModelfv(GL_LIGHT_MODEL_AMBIENT, no_ambientLight);            // 关掉默认的全局环境光            glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);            glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);            glLightfv(GL_LIGHT0, GL_POSITION, m_LightPostion);            glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);            glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);            glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);            glMaterialfv(GL_FRONT, GL_SHININESS, low_shininess);            glMaterialfv(GL_FRONT, GL_EMISSION, no_mat);            glEnable(GL_LIGHT0);        }        // 4.辐射光与低镜面光        if (color_type == 18) {            glEnable(GL_LIGHTING);            glLightModelfv(GL_LIGHT_MODEL_AMBIENT, no_ambientLight);            // 关掉默认的全局环境光            glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);            glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);            glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);            glLightfv(GL_LIGHT0, GL_POSITION, m_LightPostion);            glMaterialfv(GL_FRONT, GL_AMBIENT, no_mat);            glMaterialfv(GL_FRONT, GL_DIFFUSE, no_mat);            glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);            glMaterialfv(GL_FRONT, GL_SHININESS, low_shininess);            glMaterialfv(GL_FRONT, GL_EMISSION, mat_emission);            glEnable(GL_LIGHT0);        }    }}1
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这里写图片描述

6.纹理载入映射

BOOL CmyopenglView::LoadImageResources(){    FILE *File = NULL;    AUX_RGBImageRec* textrue_Resource[6];    if (model == 5 && type == 51)        resource_path[0] = "shuijing.bmp";    if(model == 5 && type == 52 )        resource_path[0] = "earth.bmp";    if (model == 5 && type == 53)        resource_path[0] = "painting1.bmp";     if (model == 5 && type == 54)        resource_path[0] = "5.bmp";    /*resource_path[1] = "image/2.bmp";    resource_path[2] = "image/3.bmp";    resource_path[3] = "image/4.bmp";    resource_path[4] = "image/5.bmp";    resource_path[5] = "image/6.bmp";*/    //装载图像文件资源      for (int i = 0; i < 6; i++)//如果只需要一张贴图其实resource_path数组只需要一个元素就可以了    {        File = fopen(resource_path[0], "r");        if (!File)        {            //MessageBox(NULL, "加载图像资源文件失败 !", "Fail", MB_OK);            return FALSE;        }        fclose(File);        CString str = CString(resource_path[0]);        USES_CONVERSION;        LPCWSTR wszClassName = A2CW(W2A(str));        textrue_Resource[i] = auxDIBImageLoad(wszClassName);        File = NULL;    }    //生成纹理    glGenTextures(6, texture);    for (int i = 0; i < 6; i++)    {        glBindTexture(GL_TEXTURE_2D, texture[i]);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);        //Use the mipmap texture        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);        gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, \            textrue_Resource[i]->sizeX, textrue_Resource[i]->sizeY, \            GL_RGB, GL_UNSIGNED_BYTE, textrue_Resource[i]->data);        //删除堆上的临时图像        delete textrue_Resource[i]->data;        delete textrue_Resource[i];    }    return TRUE;}1
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void CmyopenglView::Draw_textrue() {    GLUquadricObj* qobj;    glClearColor(0.0, 0.0, 0.0, 0.0);    glShadeModel(GL_FLAT);    glEnable(GL_DEPTH_TEST);    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);    InitalLigt();       ///初始化光照信息    glEnable(GL_TEXTURE_2D);    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);    glPushMatrix();    glTranslatef(0.0f, 0.0f, scale);        //滚轮缩放    gluLookAt(r*cos(c*du), h, r*sin(c*du), 0, 0, 0, 0, 1, 0); //从视点看远点,y轴方向(0,1,0)是上方向，鼠标拖动    glRotatef(this->rotate_x, 1.0, 0.0, 0.0);    glRotatef(this->rotate_y, 0.0, 1.0, 0.0);    glRotatef(this->rotate_z, 0.0, 0.0, 1.0);    if (zuobiao)        ordination();    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);    qobj = gluNewQuadric();    //画球体    glBindTexture(GL_TEXTURE_2D, texture[0]);    glEnable(GL_TEXTURE_2D);    gluQuadricTexture(qobj, GL_TRUE);//纹理函数    if (type == 51)    {        glBegin(GL_QUADS);        // Front Face        glTexCoord2f(0.0f, 0.0f); glVertex3f(-3.0f, -3.0f, 3.0f);        glTexCoord2f(1.0f, 0.0f); glVertex3f(3.0f, -3.0f, 3.0f);        glTexCoord2f(1.0f, 1.0f); glVertex3f(3.0f, 3.0f, 3.0f);        glTexCoord2f(0.0f, 1.0f); glVertex3f(-3.0f, 3.0f, 3.0f);        // Back Face        glTexCoord2f(0.0f, 0.0f); glVertex3f(-3.0f, -3.0f, -3.0f);        glTexCoord2f(1.0f, 0.0f); glVertex3f(-3.0f, 3.0f, -3.0f);        glTexCoord2f(1.0f, 1.0f); glVertex3f(3.0f, 3.0f, -3.0f);        glTexCoord2f(0.0f, 1.0f); glVertex3f(3.0f, -3.0f, -3.0f);        // Top Face        glTexCoord2f(0.0f, 0.0f); glVertex3f(-3.0f, 3.0f, -3.0f);        glTexCoord2f(1.0f, 0.0f); glVertex3f(-3.0f, 3.0f, 3.0f);        glTexCoord2f(1.0f, 1.0f); glVertex3f(3.0f, 3.0f, 3.0f);        glTexCoord2f(0.0f, 1.0f); glVertex3f(3.0f, 3.0f, -3.0f);        // Bottom Face        glTexCoord2f(0.0f, 0.0f); glVertex3f(-3.0f, -3.0f, -3.0f);        glTexCoord2f(1.0f, 0.0f); glVertex3f(3.0f, -3.0f, -3.0f);        glTexCoord2f(1.0f, 1.0f); glVertex3f(3.0f, -3.0f, 3.0f);        glTexCoord2f(0.0f, 1.0f); glVertex3f(-3.0f, -3.0f, 3.0f);        // Right face        glTexCoord2f(0.0f, 0.0f); glVertex3f(3.0f, -3.0f, -3.0f);        glTexCoord2f(1.0f, 0.0f); glVertex3f(3.0f, 3.0f, -3.0f);        glTexCoord2f(1.0f, 1.0f); glVertex3f(3.0f, 3.0f, 3.0f);        glTexCoord2f(0.0f, 1.0f); glVertex3f(3.0f, -3.0f, 3.0f);        // Left Face        glTexCoord2f(0.0f, 0.0f); glVertex3f(-3.0f, -3.0f, -3.0f);        glTexCoord2f(1.0f, 0.0f); glVertex3f(-3.0f, -3.0f, 3.0f);        glTexCoord2f(1.0f, 1.0f); glVertex3f(-3.0f, 3.0f, 3.0f);        glTexCoord2f(0.0f, 1.0f); glVertex3f(-3.0f, 3.0f, -3.0f);        glEnd();    }    if( type == 52 )    gluSphere(qobj, 4, 60, 60);//二次曲面qobj    if( type == 53 )    gluCylinder(qobj, 3.5, 3.5, 6, 26, 23);    if( type == 54 )    gluCylinder(qobj, 3.5, 0.0, 6, 26, 23);    glPopMatrix();    glDisable(GL_TEXTURE_2D);}1
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这里写图片描述

6.读取obj模型
我只是简单的读取vt,vn,f等基本参数

void CmyopenglView::ReadObj(char* Filename){    VN.clear();    V.clear();    VT.clear();    F.clear();    FQ.clear();    ifstream in(Filename);    string aline; //逐行读入    string erase;    while (getline(in, aline))    {        if (aline[0] == 'v')        {            if (aline[1] == 'n') //vn            {                istringstream sin(aline);                Vertex v;                sin >> erase >> v.x >> v.y >> v.z;                VN.push_back(v);            }            else if (aline[1] == 't')//vt            {                istringstream sin(aline);                Texture v;                sin >> erase >> v.s >> v.t;                VT.push_back(v);            }            else //v            {                istringstream sin(aline);                Vertex v;                sin >> erase >> v.x >> v.y >> v.z;                V.push_back(v);            }        }        else if (aline[0] == 'f')        {            istringstream sin(aline);            sin >> erase;            vector<string> strvector;            string temp;            while (sin >> temp) {                strvector.push_back(temp);            }            if (strvector.size() == 3) {//三角面片                Face fff;                for (int count = 0; count < 3; count++) {                    string kkk = strvector[count];                    int i = 0;                    int num = 0;                    //顶点索引                    for (; i < kkk.size() && kkk[i] != '/'; i++)                        num = num * 10 + kkk[i] - '0';                    fff.v[count] = num;                    i++;                    num = 0;                    //vt                    num = 0;                    for (; i < kkk.size() && kkk[i] != '/'; i++)                        num = num * 10 + kkk[i] - '0';                    fff.vt[0] = num;                    i++;                    num = 0;                    //法向量索引                    for (; i < kkk.size() && kkk[i] != '/'; i++)                        num = num * 10 + kkk[i] - '0';                    fff.vn[count] = num;                }                F.push_back(fff);            }            else if (strvector.size() == 4)            {                FaceQ fff;                for (int count = 0; count < strvector.size(); count++) {                    string kkk = strvector[count];                    int i = 0;                    int num = 0;                    //顶点索引                    for (; i < kkk.size() && kkk[i] != '/'; i++)                        num = num * 10 + kkk[i] - '0';                    fff.v[count] = num;                    i++;                    num = 0;                    //vt                    num = 0;                    for (; i < kkk.size() && kkk[i] != '/'; i++)                        num = num * 10 + kkk[i] - '0';                    fff.vt[0] = num;                    i++;                    num = 0;                    //法向量索引                    for (; i < kkk.size() && kkk[i] != '/'; i++)                        num = num * 10 + kkk[i] - '0';                    fff.vn[count] = num;                }                FQ.push_back(fff);            }        }    }}1
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绘制obj模型：

void CmyopenglView::OnReadobj(){    model = 6;    wchar_t filters[] =        L"3D模型文件(*.obj)\|*.obj|所有文件(*.*)|*.*||";    CFileDialog fileDlg(TRUE, NULL, NULL,        OFN_HIDEREADONLY, filters);    if (fileDlg.DoModal() == IDOK)    {        CString strBuf = fileDlg.GetPathName();        USES_CONVERSION;        char *Filename = T2A(strBuf.GetBuffer(0));        ReadObj(Filename);    }    stringstream ss;    ss <<"OK!";    string str;    ss >> str;    CString s;    s = str.c_str();    MessageBox(s);    float min_x, min_y, min_z, max_x, max_y, max_z;    min_x = min_y = min_z = 10000000;    max_x = max_y = max_z = -1000000;    for (int i = 0; i < V.size(); i++)    {        min_x = min(min_x, V[i].x);        min_y = min(min_y, V[i].y);        min_z = min(min_z, V[i].z);        max_x = max(max_x, V[i].x);        max_y = max(max_y, V[i].y);        max_z = max(max_z, V[i].z);    }    worldx = (min_x + max_x) / 2;    worldy = (min_y + max_y) / 2;    worldz = (min_z + max_z) / 2;    type = 1;    Invalidate();    CDC* ppDC = GetWindowDC();    OnDrawGL(ppDC);    // TODO: 在此添加命令处理程序代码}void CmyopenglView::Draw_obj(){    if (type == 1) {        if (!VN.empty()) {            for (int i = 0; i < F.size(); i++) {                glBegin(GL_LINE_LOOP);                for (int j = 0; j < 3; j++) {                    glVertex3f(V[F[i].v[j] - 1].x, V[F[i].v[j] - 1].y, V[F[i].v[j] - 1].z);                }                glEnd();            }            for (int i = 0; i < FQ.size(); i++) {                glBegin(GL_LINE_LOOP);                for (int j = 0; j < 4; j++) {                    glVertex3f(V[FQ[i].v[j] - 1].x, V[FQ[i].v[j] - 1].y, V[FQ[i].v[j] - 1].z);                }                glEnd();            }        }        else {            for (int i = 0; i < F.size(); i++) {                glBegin(GL_LINE_LOOP);                for (int j = 0; j < 3; j++) {                    glVertex3f(V[F[i].v[j] - 1].x, V[F[i].v[j] - 1].y, V[F[i].v[j] - 1].z);                }                glEnd();            }            for (int i = 0; i < FQ.size(); i++) {                glBegin(GL_LINE_LOOP);                for (int j = 0; j < 4; j++) {                    glVertex3f(V[FQ[i].v[j] - 1].x, V[FQ[i].v[j] - 1].y, V[FQ[i].v[j] - 1].z);                }                glEnd();            }        }    }    else if (type == 3) {        glBegin(GL_POINTS);        for (int i = 0; i < V.size(); i++)            glVertex3f(V[i].x, V[i].y, V[i].z);        glEnd();    }    else    {        if (!VN.empty()) {            for (int i = 0; i < F.size(); i++) {                glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);                glBegin(GL_TRIANGLES);                for (int j = 0; j < 3; j++) {                    glNormal3f(VN[F[i].vn[j] - 1].x, VN[F[i].vn[j] - 1].y, VN[F[i].vn[j] - 1].z);                    glVertex3f(V[F[i].v[j] - 1].x, V[F[i].v[j] - 1].y, V[F[i].v[j] - 1].z);                }                glEnd();            }            for (int i = 0; i < FQ.size(); i++) {                glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);                glBegin(GL_QUADS);                for (int j = 0; j < 4; j++) {                    glNormal3f(VN[FQ[i].vn[j] - 1].x, VN[FQ[i].vn[j] - 1].y, VN[FQ[i].vn[j] - 1].z);                    glVertex3f(V[FQ[i].v[j] - 1].x, V[FQ[i].v[j] - 1].y, V[FQ[i].v[j] - 1].z);                }                glEnd();            }        }        else        {            for (int i = 0; i < F.size(); i++) {                glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);                glBegin(GL_TRIANGLES);                for (int j = 0; j < 3; j++) {                    glVertex3f(V[F[i].v[j] - 1].x, V[F[i].v[j] - 1].y, V[F[i].v[j] - 1].z);                }                glEnd();            }            for (int i = 0; i < FQ.size(); i++) {                glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);                glBegin(GL_QUADS);                for (int j = 0; j < 4; j++) {                    glVertex3f(V[FQ[i].v[j] - 1].x, V[FQ[i].v[j] - 1].y, V[FQ[i].v[j] - 1].z);                }                glEnd();            }        }    }}1
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这里写图片描述

源码下载：链接：http://pan.baidu.com/s/1slANShZ 密码：hbwj

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