QTextureMaterial error : 'Unable to find suitable Texture Unit for "diffuseTexture"' (OGL), 'Sampler "diffuseTexture" wasn't set on material. Rendering might not work as expected' (DX)

uani

Hello,

I followed https://doc.qt.io/qt-6/qt3d-simple-cpp-example.html but I replaced the material by a QTextureMaterial.

The texture I set is not shown and I receive the following errors:

OpenGL:
Qt3D.Renderer.OpenGL.Backend: Unable to find suitable Texture Unit for "diffuseTexture"

DirectX:
Qt3D.Renderer.RHI.Backend: Sampler "diffuseTexture" wasn't set on material. Rendering might not work as expected
D3D11 WARNING: ID3D11DeviceContext::DrawIndexed: The Pixel Shader unit expects a Sampler to be set at Slot 0, but none is bound. This is perfectly valid, as a NULL Sampler maps to default Sampler state. However, the developer may not want to rely on the defaults. [ EXECUTION WARNING #352: DEVICE_DRAW_SAMPLER_NOT_SET]

Here's the code:

    Qt3DRender::QMaterial* material = new Qt3DExtras::QTextureMaterial(rootEntity);
    Derived<Qt3DRender::QTextureImage>* dti = new Derived<Qt3DRender::QTextureImage>();
    Qt3DRender::QTextureImage* ti = dti->get();
    connect(ti, &Qt3DRender::QTextureImage::statusChanged, this, &mainCore::debugLog);
    ti->setSource(QUrl("file:///E:/IDrive-Sync/Dokumente/Qt Projects/Mylonite/cache/0_0_0.jpg"));
    Derived<Qt3DRender::QTexture2D>* dt = new Derived<Qt3DRender::QTexture2D>();
    Qt3DRender::QTexture2D* t = dt->get();
    t->addTextureImage(ti);
    ((Qt3DExtras::QTextureMaterial)material).setTexture(t);

Note: "Derived" is a memory manager (https://github.com/u-an-i/MemoryManagement), which is not the issue (i tried "new"ing the classes directly too), I don't even receive a status change signal, the file is a JPG and present at the location given.

Must I perhaps use a particular texture file format? If yes, which?

uani

my bad:

((Qt3DExtras::QTextureMaterial)material).setTexture(t);

should have been

((Qt3DExtras::QTextureMaterial*)material)->setTexture(t);

:facepalm:

i'm sorry for bothering you.

However the "status changed" signal i'm still not receiving.