Re: [Interest] Drawing Frustum on Scene3D
Hi in Qt 3D you can use a QGeometryRenderer with primitiveType set to Lines (or LineLoop, LineStrip depending on how you structure your data). Checkout https://code.qt.io/cgit/qt/qt3d.git/tree/tests/manual/raycasting-qml/LineEntity.qml Mike > On 5 Mar 2021, at 14:16, Alex john wrote: > > But in quick3D that would be done with a class derived from > QQuick3DGeometry with primitives set to lines > "setPrimitiveType(QQuick3DGeometry::PrimitiveType::Lines)" > to construct a cube. Then register that class to qml and use it in > your View3D. Hope it helps. > > Any alternative to QQuick3DGeometry as I'm using 5.10? > > On Fri, Mar 5, 2021 at 5:00 PM joao morgado wrote: >> >> Hi >> >> That frustum is just a group of lines in cube shape, you see it as a frustum >> because the camera is in perspective mode. >> I never used Qt3D so cannot help with scene3d. >> But in quick3D that would be done with a class derived from QQuick3DGeometry >> with primitives set to lines >> "setPrimitiveType(QQuick3DGeometry::PrimitiveType::Lines)" >> to construct a cube. Then register that class to qml and use it in your >> View3D. Hope it helps. >> >> João >> Em sexta-feira, 5 de março de 2021 09:46:15 GMT, Alex john >> escreveu: >> >> >> Hello Qt >> >> I like to render a frustum as here https://imgur.com/a/BzmCQ2D on >> Scene3d. Can you let me know how it can be done? If I have to get the >> custom QML ,do I have to get it from the C++ and then push it to the >> QML context? Any pointers to basic code is appreciated. >> >> Thanks. >> ___ >> Interest mailing list >> Interest@qt-project.org >> https://lists.qt-project.org/listinfo/interest > ___ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest — Mike Krus | mike.k...@kdab.com | Senior Software Engineer & Teamlead KDAB (UK) Ltd., a KDAB Group company Tel: UK Office +44 1625 809908 Mobile +44 7833 491941 KDAB - The Qt Experts, C++, OpenGL Experts smime.p7s Description: S/MIME cryptographic signature ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
Re: [Interest] Drawing Frustum on Scene3D
But in quick3D that would be done with a class derived from QQuick3DGeometry with primitives set to lines "setPrimitiveType(QQuick3DGeometry::PrimitiveType::Lines)" to construct a cube. Then register that class to qml and use it in your View3D. Hope it helps. Any alternative to QQuick3DGeometry as I'm using 5.10? On Fri, Mar 5, 2021 at 5:00 PM joao morgado wrote: > > Hi > > That frustum is just a group of lines in cube shape, you see it as a frustum > because the camera is in perspective mode. > I never used Qt3D so cannot help with scene3d. > But in quick3D that would be done with a class derived from QQuick3DGeometry > with primitives set to lines > "setPrimitiveType(QQuick3DGeometry::PrimitiveType::Lines)" > to construct a cube. Then register that class to qml and use it in your > View3D. Hope it helps. > > João > Em sexta-feira, 5 de março de 2021 09:46:15 GMT, Alex john > escreveu: > > > Hello Qt > > I like to render a frustum as here https://imgur.com/a/BzmCQ2D on > Scene3d. Can you let me know how it can be done? If I have to get the > custom QML ,do I have to get it from the C++ and then push it to the > QML context? Any pointers to basic code is appreciated. > > Thanks. > ___ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
Re: [Interest] Drawing Frustum on Scene3D
Hi That frustum is just a group of lines in cube shape, you see it as a frustum because the camera is in perspective mode.I never used Qt3D so cannot help with scene3d. But in quick3D that would be done with a class derived from QQuick3DGeometry with primitives set to lines "setPrimitiveType(QQuick3DGeometry::PrimitiveType::Lines)"to construct a cube. Then register that class to qml and use it in your View3D. Hope it helps. JoãoEm sexta-feira, 5 de março de 2021 09:46:15 GMT, Alex john escreveu: Hello Qt I like to render a frustum as here https://imgur.com/a/BzmCQ2D on Scene3d. Can you let me know how it can be done? If I have to get the custom QML ,do I have to get it from the C++ and then push it to the QML context? Any pointers to basic code is appreciated. Thanks. ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
[Interest] Drawing Frustum on Scene3D
Hello Qt I like to render a frustum as here https://imgur.com/a/BzmCQ2D on Scene3d. Can you let me know how it can be done? If I have to get the custom QML ,do I have to get it from the C++ and then push it to the QML context? Any pointers to basic code is appreciated. Thanks. ___ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
