Qt3d:应用Qt3DRender :: QLayerFilter时显示的工件 [英] Qt3d: Artifacts of displaying when applied Qt3DRender::QLayerFilter

问题描述

我正在尝试使用图层过滤，如此答案所示.为此，我编写了一个简单的测试(请参见下文).这是问题的延续.

I am trying to use layer filtering as shown in this answer. For this I wrote a simple test (see below). This is a continuation of the question.

在红色球体的某个位置会出现一个伪像，看起来像是从另一台摄像机以坐标(0.0，0.0，0.0)进行显示.

At a certain position of the red sphere, an artifact appears, which looks like display from the another camera in coordinates (0.0, 0.0, 0.0).

查看屏幕:

在我的示例中，可以使用WSAD按钮移动红色球体. 请参阅(-7、0，-14)红色球体位置.如何清除这些文物? 可以在此处查看完整的测试项目.

In my example, the red sphere can be moved with the WSAD buttons. See (-7, 0, -14) red sphere position. How to remove these artifacts? The full test project can be viewed here.

main.cpp

int main(int argc, char *argv[])
{
    QGuiApplication application(argc, argv);
        My3DWindow window;

        auto sphere1 = new Qt3DCore::QEntity(window.Scene());
        auto sphere2 = new Qt3DCore::QEntity(window.Scene());

        // material, transform, mesh initialisation

        sphere1->addComponent(material1);
        sphere1->addComponent(spheremesh1);
        sphere1->addComponent(transform1);
        sphere1->addComponent(window.OpaqueLayer());

        sphere2->addComponent(material2);
        sphere2->addComponent(spheremesh2);
        sphere2->addComponent(transform2);
        sphere2->addComponent(window.TransparentLayer());

        window.show();
        return application.exec();
    }

My3DWindow类:

My3DWindow::My3DWindow(QScreen *screen):
    Qt3DExtras::Qt3DWindow(screen)
{
    m_Scene = new Qt3DCore::QEntity;
    setRootEntity(m_Scene);

    auto renderSurfaceSelector = new Qt3DRender::QRenderSurfaceSelector(m_Scene);
    renderSurfaceSelector->setSurface(this);
    auto clearBuffers = new Qt3DRender::QClearBuffers(renderSurfaceSelector);
    clearBuffers->setBuffers(Qt3DRender::QClearBuffers::AllBuffers);
    clearBuffers->setClearColor(Qt::gray);

    auto viewport = new Qt3DRender::QViewport(renderSurfaceSelector);
    auto cameraSelector = new Qt3DRender::QCameraSelector(viewport);

    m_Camera = new Qt3DRender::QCamera(cameraSelector);
    m_Camera->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
    m_Camera->setPosition(QVector3D(0.0f, 0.0f, 100.0f));
    m_Camera->setViewCenter(QVector3D(0.0f, 0.0f, 0.0f));

    cameraSelector->setCamera(m_Camera);

    auto cameraController = new Qt3DExtras::QFirstPersonCameraController(m_Scene);
    cameraController->setCamera(m_Camera);

    m_OpaqueLayer = new Qt3DRender::QLayer;
    auto opaqueFilter = new Qt3DRender::QLayerFilter(m_Camera);
    opaqueFilter->addLayer(m_OpaqueLayer);

    m_TransparentLayer = new Qt3DRender::QLayer;
    auto transparentFilter = new Qt3DRender::QLayerFilter(m_Camera);
    transparentFilter->addLayer(m_TransparentLayer);

    setActiveFrameGraph(renderSurfaceSelector);
}

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推荐答案

已修复.在原始示例中，发现错误.我不完全理解为什么这样做是正确的:

Fixed. In the original example, an error found. I don't fully understand why it's the right thing to do:

auto clearBuffers = new Qt3DRender::QClearBuffers(cameraSelector);

插入

auto clearBuffers = new Qt3DRender::QClearBuffers(renderSurfaceSelector);

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