OSG嵌入Qt窗体的范例

#include "osgWidget.h" #include <QHBoxLayout> #include <osg/LineWidth> osgWidget::osgWidget(osgViewer::ViewerBase::ThreadingModel threadingModel) :QWidget() { setThreadingModel(threadingModel); //qt5 must single thread.else be crash setKeyEventSetsDone(0); QHBoxLayout *mainLayout = new QHBoxLayout(this); QWidget *mainWidget = getWidgetFromGraphicWinQt(createGraphicWindow(20, 20 ,640, 480), makeCoordinate()); mainLayout->addWidget(mainWidget); connect(&m_timer, SIGNAL(timeout()), this, SLOT(update())); m_timer.start(10); //刷新(重绘)频率 } osgWidget::~osgWidget() { } osg::Geode *osgWidget::makeCoordinate() { //创建保存几何信息的对象 osg::ref_ptr<osg::Geometry> geom = new osg::Geometry(); //创建四个顶点 osg::ref_ptr<osg::Vec3Array> vPoint = new osg::Vec3Array(); vPoint->push_back(osg::Vec3(300, 280, 200)); vPoint->push_back(osg::Vec3(200, 360, 0)); //1 vPoint->push_back(osg::Vec3(300, 280, 200)); vPoint->push_back(osg::Vec3(300, 200, 0)); //2 vPoint->push_back(osg::Vec3(300, 280, 200)); vPoint->push_back(osg::Vec3(400, 360, 0)); //3 vPoint->push_back(osg::Vec3(200, 360, 0)); vPoint->push_back(osg::Vec3(300, 200, 0)); //t-l vPoint->push_back(osg::Vec3(200, 360, 0)); vPoint->push_back(osg::Vec3(400, 360, 0)); //t-r vPoint->push_back(osg::Vec3(300, 200, 0)); vPoint->push_back(osg::Vec3(400, 360, 0)); //l-r geom->setVertexArray(vPoint.get()); //为每个顶点指定一种颜色 osg::ref_ptr<osg::Vec4Array> c = new osg::Vec4Array(); c->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); c->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); c->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); c->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); c->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); c->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); c->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //坐标原点为蓝色 c->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //z blue c->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //坐标原点为蓝色 c->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //z blue c->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //坐标原点为蓝色 c->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //z blue //如果没指定颜色则会变为黑色 geom->setColorArray(c.get()); geom->setColorBinding(osg::Geometry::BIND_PER_VERTEX); //三个轴 geom->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 0, 2)); //Y geom->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 2, 2)); //Y geom->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 4, 2)); //Z geom->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 6, 2)); //Y geom->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 8, 2)); //Y geom->addPrimitiveSet( new osg::DrawArrays(osg::PrimitiveSet::LINES, 10, 2)); //Z osg::ref_ptr<osgText::Text> pTextOAuxis = new osgText::Text; pTextOAuxis->setText(QString("O(300,280,200)").toStdWString().c_str()); pTextOAuxis->setFont("Fonts/simhei.ttf"); pTextOAuxis->setAxisAlignment(osgText::Text::SCREEN); pTextOAuxis->setCharacterSize(10); pTextOAuxis->setPosition(osg::Vec3(250, 280, 200)); osg::ref_ptr<osgText::Text> pTextAAuxis = new osgText::Text; pTextAAuxis->setText(QString("A(200,360,0)").toStdWString().c_str()); pTextAAuxis->setFont("Fonts/simhei.ttf"); pTextAAuxis->setAxisAlignment(osgText::Text::SCREEN); pTextAAuxis->setCharacterSize(10); pTextAAuxis->setPosition(osg::Vec3(150, 360, 0)); osg::ref_ptr<osgText::Text> pTextBAuxis = new osgText::Text; pTextBAuxis->setText(QString("B(300,200,0)").toStdWString().c_str()); pTextBAuxis->setFont("Fonts/simhei.ttf"); pTextBAuxis->setAxisAlignment(osgText::Text::SCREEN); pTextBAuxis->setCharacterSize(10); pTextBAuxis->setPosition(osg::Vec3(250, 200, 0)); osg::ref_ptr<osgText::Text> pTextCAuxis = new osgText::Text; pTextCAuxis->setText(QString("C(400,360,0)").toStdWString().c_str()); pTextCAuxis->setFont("Fonts/simhei.ttf"); pTextCAuxis->setAxisAlignment(osgText::Text::SCREEN); pTextCAuxis->setCharacterSize(10); pTextCAuxis->setPosition(osg::Vec3(350, 360, 0)); osg::ref_ptr<osg::Geode> geode = new osg::Geode(); geode->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF); geode->getOrCreateStateSet()->setAttribute(new osg::LineWidth(3.0), osg::StateAttribute::ON); //geode->addDrawable(pShapeDrawable.get()); geode->addDrawable(geom.get()); geode->addDrawable(pTextOAuxis.get()); geode->addDrawable(pTextAAuxis.get()); geode->addDrawable(pTextBAuxis.get()); geode->addDrawable(pTextCAuxis.get()); return geode.release(); } osgQt::GraphicsWindowQt* osgWidget::createGraphicWindow(int x, int y, int width, int height, const QString strName, bool bWindosDecoration) { osg::DisplaySettings *ds = osg::DisplaySettings::instance().get(); osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits; traits->x = x; traits->y = y; traits->width = width; traits->height = height; traits->doubleBuffer = true; traits->alpha = ds->getMinimumNumAccumAlphaBits(); traits->stencil = ds->getMinimumNumStencilBits(); traits->sampleBuffers = ds->getMultiSamples(); traits->samples = ds->getNumMultiSamples(); return new osgQt::GraphicsWindowQt(traits.get()); } QWidget *osgWidget::getWidgetFromGraphicWinQt(osgQt::GraphicsWindowQt *winQt, osg::Node *scene) { osgViewer::View *view = new osgViewer::View; addView(view); osg::Camera *camera = view->getCamera(); camera->setGraphicsContext(winQt); const osg::GraphicsContext::Traits *pTrait = winQt->getTraits(); camera->setClearColor(osg::Vec4(0.2, 0.2, 0.6, 1.0)); camera->setViewport(new osg::Viewport(0, 0, pTrait->width, pTrait->height)); camera->setProjectionMatrixAsPerspective(30, static_cast<double>(pTrait->width) / static_cast<double>(pTrait->height), 1.0, 10000); view->setSceneData(scene); view->addEventHandler(new osgViewer::StatsHandler); view->setCameraManipulator(new osgGA::TrackballManipulator); return winQt->getGLWidget(); } void osgWidget::paintEvent(QPaintEvent *e) { frame(); }