我试图在Scene3D
场景中的长方体或平面上渲染QML组件。我已经成功地遵循了文档中的示例,但我试图将其转换为C ++ API,因为我需要做更多的事情,只有C ++就足够了。这是我的类的ctor,它根据示例代码设置实体及其组件。我只是为了简洁而包括ctor。该课程中没有任何其他内容可以影响到这一点。
ESEctoPointToast::ESEctoPointToast(Qt3DCore::QNode *parent)
: Qt3DCore::QEntity(parent)
, m_position(QVector3D(0,0,0))
, m_quickItem(nullptr)
, m_cuboid(new Qt3DExtras::QCuboidMesh())
, m_textureMaterial(new Qt3DExtras::QTextureMaterial())
, m_transform(new Qt3DCore::QTransform())
, m_objectPicker(new Qt3DRender::QObjectPicker())
, m_texture2d(new Qt3DRender::QTexture2D())
, m_renderTargetOutput(new Qt3DRender::QRenderTargetOutput())
, m_scene2d(new Qt3DRender::Quick::QScene2D())
{
// g_RootQmlObject is the root item in the main scene, this was the only
// way I could come up with to access qmlEngine. Is there a better way?
auto engine = qmlEngine(g_RootQmlObject);
QQmlComponent c(engine, QUrl("qrc:/components/E3DDummy.qml"));
m_quickItem = qobject_cast<QQuickItem*>(c.create());
Q_ASSERT(m_quickItem);
m_texture2d->setWidth(256);
m_texture2d->setHeight(256);
m_texture2d->setFormat(Qt3DRender::QAbstractTexture::TextureFormat::RGB8_UNorm);
m_texture2d->setGenerateMipMaps(true);
m_texture2d->setMagnificationFilter(Qt3DRender::QAbstractTexture::Filter::Linear);
m_texture2d->setMinificationFilter(Qt3DRender::QAbstractTexture::Filter::LinearMipMapLinear);
m_texture2d->setWrapMode(Qt3DRender::QTextureWrapMode(Qt3DRender::QTextureWrapMode::ClampToEdge));
m_renderTargetOutput->setAttachmentPoint(Qt3DRender::QRenderTargetOutput::AttachmentPoint::Color0);
m_renderTargetOutput->setTexture(m_texture2d);
m_textureMaterial->setTexture(m_texture2d);
m_scene2d->setItem(m_quickItem);
m_scene2d->setMouseEnabled(true);
m_scene2d->setRenderPolicy(Qt3DRender::Quick::QScene2D::RenderPolicy::Continuous);
m_scene2d->setOutput(m_renderTargetOutput);
m_scene2d->addEntity(this);
addComponent(m_transform);
addComponent(m_textureMaterial);
addComponent(m_cuboid);
addComponent(m_objectPicker);
}
我将它包含在另一个类的Scene3D中,在那里它呈现为一个黑色的盒子,上面有无意义的红色文字。显然这不对。我哪里出错?
答案 0 :(得分:0)
这是由Qt 5.9.x中存在的错误引起的。 https://bugreports.qt.io/browse/QTBUG-60974此时没有可行的解决方案。显然在飞机表面上渲染QML在当前时间被打破。