基于QT使用OpenGL，加载obj模型，进行鼠标交互

#include "glwidget.h" #include "box.h" int glwidget::mouse_button = -1; int glwidget::modifier_key = 0; double glwidget::mouse_pos_x_old = 0; double glwidget::mouse_pos_y_old = 0; glwidget::glwidget(QWidget * parent):QOpenGLWidget(parent) { keyRespondTimer = new QTimer(this); //构造函数中创建定时器对象，并连接信号槽 connect(keyRespondTimer, &QTimer::timeout, this, &glwidget::slotTimeOut); setFocusPolicy(Qt::StrongFocus);//否则进入不了键盘事件监听 } void glwidget::initializeGL() { initializeOpenGLFunctions(); glEnable(GL_DEPTH_TEST); m_render.init(); m_camera.setMatPro(fov); QStringList renderfiles={ ":/obj/data/Cayman_GT.obj", ":/obj/data/bunny_10k.obj", }; for(QString file : renderfiles){ Box* b1 = new Box(); b1->load(file); m_render.addBox(b1); } m_grid.initize(); m_coordsys.initize(); } void glwidget::resizeGL(int w, int h) { m_camera.setRatio((float)width() / (float)height()); } void glwidget::paintGL() { glClearColor(1.0f, 1.0f, 1.0f, 0.1f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPolygonMode(GL_FRONT, GL_LINE); QOpenGLExtraFunctions *f = QOpenGLContext::currentContext()->extraFunctions(); QMatrix4x4 mMatrix; m_camera.setMatPro(fov); m_grid.paint(f,m_camera.getMatPro(),m_camera.getMatView(),mMatrix); m_coordsys.paint(f,m_camera.getMatPro(),m_camera.getMatView(),mMatrix); m_render.render(f,m_camera,mMatrix); } void glwidget::mousePressEvent(QMouseEvent *event){ mouse_pos_x_old = event->pos().x(); mouse_pos_y_old = event->pos().y(); mouse_button = event->button(); } void glwidget::mouseMoveEvent(QMouseEvent *event){ int x = event->pos().x(); int y = event->pos().y(); double w = width(), h = height(); double d_x = (mouse_pos_x_old - x)/w; double d_y = (mouse_pos_y_old - y)/h; if (mouse_button == Qt::LeftButton) { foreach (int key, keys) { switch (key) { case Qt::Key_Control: m_camera.rotateY(-d_x*180*5); m_camera.rotateX(-d_y*180*5); break; case Qt::Key_Shift: m_camera.move(5*d_x, 5*d_y, 0); break; default: break; } } } mouse_pos_x_old = x; mouse_pos_y_old = y; this->repaint(); } void glwidget::mouseReleaseEvent(QMouseEvent *event){ //鼠标左键松开禁止改变相机视角 changeview_ = false; } void glwidget::wheelEvent(QWheelEvent *event){ if (event->delta() > 0) fov-=2.0f; else fov+=2.0f; if (fov<0.50f) fov = 0.5f; if (fov>=200.f) fov = 200.0; this->repaint(); } void glwidget::keyReleaseEvent(QKeyEvent *event) { if(!event->isAutoRepeat()) //判断如果不是长按时自动触发的释放,就将key值从容器中删除 keys.removeAll(event->key()); if(keys.isEmpty()) //容器空了，关闭定时器 keyRespondTimer->stop(); } void glwidget::keyPressEvent(QKeyEvent *event) { if(!event->isAutoRepeat()) //判断如果不是长按时自动触发的按下,就将key值加入容器 keys.append(event->key()); if(!keyRespondTimer->isActive()) //如果定时器不在运行，就启动一下 keyRespondTimer->start(4); } void glwidget::slotTimeOut(){ foreach (int key, keys) { switch (key) { case Qt::Key_D: break; case Qt::Key_Shift: modifier_key = Qt::Key_Shift; break; default: break; } } } void glwidget::chageModel() { }