QT+OpenGL六面六色鼠标手势操作旋转立方体 滚轮缩放

#include <QApplication> #include <myglwidget.h> #include <glut.h> #include <QMatrix> #include <QMouseEvent> #include <QWheelEvent> // 立方体的8个顶点坐标 float vertex_point[8][4]={0}; GLint index_list[][4] = { 0, 2, 3, 1, 0, 4, 6, 2, 0, 1, 5, 4, 4, 5, 7, 6, 1, 3, 7, 5, 2, 6, 7, 3, }; GLfloat colors[][3] = { { 0.0, 0.0, 1.0 }, { 0.0, 1.0, 0.0 }, { 1.0, 0.0, 0.0 }, { 1.0, 0.0, 1.0 }, { 1.0, 1.0, 0.0 }, { 0.0, 1.0, 1.0 }}; MyGLWidget::MyGLWidget(QWidget *parent) : QGLWidget(parent),mScale(1) { showNormal(); } MyGLWidget::~MyGLWidget() { } void MyGLWidget::resizeGL(int width, int height) { if(height == 0) height =1; glViewport(0,0,width,height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0f,width/height,0.1f,100.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void MyGLWidget::initializeGL() { //行存储 up4ps.setRow(0,{-1.0f, -1.0f, -1.0f,1.0f}); up4ps.setRow(1,{1.0f, -1.0f, -1.0f,1.0f}); up4ps.setRow(2,{-1.0f, 1.0f, -1.0f,1.0f}); up4ps.setRow(3,{1.0f, 1.0f, -1.0f,1.0f}); down4ps.setRow(0,{-1.0f, -1.0f, 1.0f,1.0f}); down4ps.setRow(1,{1.0f, -1.0f, 1.0f,1.0f}); down4ps.setRow(2,{-1.0f, 1.0f, 1.0f,1.0f}); down4ps.setRow(3,{1.0f, 1.0f, 1.0f,1.0f}); glShadeModel(GL_SMOOTH); glClearColor(1.0f,1.0f,1.0f,0.0f); glClearDepth(1.0f); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL); glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST); glEnableClientState(GL_COLOR_ARRAY); glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3,GL_FLOAT,0,vertex_point); glColorPointer(3,GL_FLOAT,0,colors); } void MyGLWidget::paintGL() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glTranslatef(0.0f,0.0f,-7.0f); projection.rotate(rotation); projection.scale(mScale); int i = 0, j=0; float *p; p=(up4ps*projection).data(); for(i=0;i<4;i++){ for(j=0;j<4;j++,p++){ vertex_point[j][i]=*p; } } p=(down4ps*projection).data(); for(i=0;i<4;i++){ for(j=0;j<4;j++,p++){ vertex_point[j+4][i]=*p; } } glColor3f(0.0f, 1.0f, 0.0f); glBegin(GL_QUADS); // 绘制四边形 for (i = 0; i < 6; ++i) // 有六个面，循环六次 { glColor3f(colors[i][0], colors[i][1], colors[i][2]); for (j = 0; j < 4; ++j) // 每个面有四个顶点，循环四次 { glVertex3fv(vertex_point[index_list[i][j]]); } } glEnd(); } void MyGLWidget::timerEvent(QTimerEvent *) { updateGL(); } void MyGLWidget::mousePressEvent(QMouseEvent *event) { mousePos = QVector2D(event->pos()); event->accept(); } void MyGLWidget::mouseMoveEvent(QMouseEvent *event) { if(event->buttons() == Qt::LeftButton) { QVector2D diff = QVector2D(event->pos()) - mousePos; qreal angle =(diff.length())/3.6; QVector3D rotationAxis = QVector3D(-diff.y(), -diff.x(), 0.0).normalized(); rotation = QQuaternion::fromAxisAndAngle(rotationAxis, angle);//* rotation; this->update(); mousePos = QVector2D(event->pos()); } event->accept(); } void MyGLWidget::wheelEvent(QWheelEvent *event) { QPoint numDegrees = event->angleDelta() / 8; if (numDegrees.y() > 0) { mScale += 0.1f; } else if (numDegrees.y() < 0) { mScale -= 0.1f; } this->update(); }