最近学习计算机图形学写的基于opengGL的作业
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()
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：
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);
}
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);
}
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);
}
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);
}
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);
}
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
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);
}
}
}
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;
}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);
}
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);
}
}
}
}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();
}
}
}
}
源码下载：链接：http://pan.baidu.com/s/1slANShZ 密码：hbwj
时间： 2024-10-12 23:11:32