[Interest] Drawing Frustum on Scene3D

[joao morgado]

 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 <blackbriar153 at gmail.com> 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.
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