Qt5 QtQuick2 QML和OpenGL混合编程完美解决源码

#include "OpenGLQuick.h" Back::Back() { setClearBeforeRendering(false); connect(this, SIGNAL(beforeRendering()), this, SLOT(paint()), Qt::DirectConnection); QTimer *timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(update()), Qt::DirectConnection); timer->start(3000); } Back::~Back() { } static bool init = false; void Back::paint() { if(!init) { QOpenGLFunctions *m_oglFunctions=new QOpenGLFunctions(QOpenGLContext::currentContext()); m_oglFunctions->initializeOpenGLFunctions(); /* * The glUseProgram(0) call tells OpenGL to bind the built-in vertex/fragement shader combo that * implements the old fixed function pipeline (the glLight and glMaterial calls you’re making). * Nowdays people usually write their own shaders so I guess Qt is assuming that you would simply * bind your own shader program before rendering. */ //everytime before doing anything OpenGL: m_oglFunctions->glUseProgram(0); } glViewport(0, 0, 150, 150); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0, 150, 150,0,0,10); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glClearColor(1,1,1,1); glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); glColor3ub(255, 255, 0); glBegin(GL_QUADS); glVertex2i(0, 0); glVertex2i(100, 0); glVertex2i(100, 100); glVertex2i(0, 100); glEnd(); }