这里是一个最小化的工作示例:
< p >< code > main.cpp :
#include <QApplication>
#include "clickwindow.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
GraphicsWindow graphicsWindow;
graphicsWindow.show();
return a.exec();
}
graphicswindow.h
:
#include <Qt3DExtras/Qt3DWindow>
#include <Qt3DCore/QEntity>
#include <Qt3DCore/QTransform>
class GraphicsWindow : public Qt3DExtras::Qt3DWindow {
public:
GraphicsWindow();
void wheelEvent ( QWheelEvent * event ) override;
private:
Qt3DCore::QEntity *createScene();
Qt3DCore::QTransform *planeTransform;
};
graphicswindow.cpp
:
#include "graphicswindow.h"
#include <QMouseEvent>
#include <Qt3DRender/QViewport>
#include <Qt3DRender/QClearBuffers>
#include <Qt3DRender/QRenderSurfaceSelector>
#include <Qt3DRender/QRenderStateSet>
#include <Qt3DRender/QCullFace>
#include <Qt3DRender/QCameraSelector>
#include <Qt3DRender/QCamera>
#include <Qt3DRender/QMaterial>
#include <Qt3DExtras/QGoochMaterial>
#include <Qt3DExtras/QPlaneMesh>
#include <Qt3DRender/QDepthTest>
GraphicsWindow::GraphicsWindow() : Qt3DExtras::Qt3DWindow() {
Qt3DRender::QCamera *camera = this->camera();
camera->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
camera->setPosition(QVector3D(20.0, 20.0, 20.0f));
camera->setViewCenter(QVector3D(0, 0, 0));
Qt3DRender::QRenderSurfaceSelector *surfaceSelector = new Qt3DRender::QRenderSurfaceSelector;
surfaceSelector->setSurface(this);
Qt3DRender::QViewport *viewport = new Qt3DRender::QViewport(surfaceSelector);
viewport->setNormalizedRect(QRectF(0, 0, 1.0, 1.0));
Qt3DRender::QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(viewport);
cameraSelector->setCamera(camera);
Qt3DRender::QClearBuffers *clearBuffers = new Qt3DRender::QClearBuffers(cameraSelector);
clearBuffers->setBuffers(Qt3DRender::QClearBuffers::ColorDepthBuffer);
clearBuffers->setClearColor(Qt::white);
Qt3DRender::QRenderStateSet *renderStateSet = new Qt3DRender::QRenderStateSet(clearBuffers);
Qt3DRender::QCullFace *cullFace = new Qt3DRender::QCullFace(renderStateSet);
cullFace->setMode(Qt3DRender::QCullFace::NoCulling);
renderStateSet->addRenderState(cullFace);
Qt3DRender::QDepthTest *depthTest = new Qt3DRender::QDepthTest;
depthTest->setDepthFunction(Qt3DRender::QDepthTest::Less);
renderStateSet->addRenderState(depthTest);
setActiveFrameGraph(surfaceSelector);
Qt3DCore::QEntity *root = createScene();
setRootEntity(root);
}
void GraphicsWindow::wheelEvent(QWheelEvent *event) {
planeTransform->setRotationZ(planeTransform->rotationZ() + event->delta() / 40.f);
}
Qt3DCore::QEntity* GraphicsWindow::createScene() {
Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity;
Qt3DCore::QEntity *planeEntity = new Qt3DCore::QEntity(rootEntity);
Qt3DRender::QMaterial *meshMaterial = new Qt3DExtras::QGoochMaterial;
Qt3DExtras::QPlaneMesh *planeMesh = new Qt3DExtras::QPlaneMesh;
planeMesh->setHeight(10);
planeMesh->setWidth(10);
planeTransform = new Qt3DCore::QTransform;
planeEntity->addComponent(planeTransform);
planeEntity->addComponent(planeMesh);
planeEntity->addComponent(meshMaterial);
return rootEntity;
}
记住,
Qt3DWindow
的
setActiveFramegraph
函数会自动将
renderSettings()
函数返回的
QRenderSettings
添加到你设置为活动帧图的帧图节点上。如果你正在实现自己的3D窗口或创建离屏渲染器,你必须使用
QRenderSettings
作为你的帧图的根节点(窗口将其渲染设置设置为您设置的根帧图节点的父节点),并将渲染设置添加到实际的根节点,即框架图和场景图的父节点。请注意不要修改html标签。