🐛 Bug report | Displayed nodes are almost invisible (possible GPU related issue)

[modenaxe]

Hello, I suspect I am reporting a visualisation issue in the presence of a GPU. In my machine the size of the nodes visualised in FEBio 3.10 is way too small, and I am concern that some of my students using the software for the first time might have the same issue and find confusing if they have to inspect/select them.

An example of the issue - a simple box geometry meshed, without visualised nodes:

and this is the same geometry with visualized nodes (almost indistinguishable):

My FEBio log detects the GPU

backend = OpenGL
driver = NVIDIA Corporation NVIDIA T1000 8GB/PCIe/SSE2 4.6.0 NVIDIA 595.95

Having the node display size customizable might solve the issue as well, maybe?

Thank you.

Luca

[SteveMaas1978]

Hi @modenaxe

In 3.0 we changed the backend from pure OpenGL to Qt's Rendering Hardware Interface (RHI). This was done to avoid problems with Mac's deprecating their OpenGL support. RHI only exposes a common rendering interface for several other backends (including Vulkan, Metal, DirectX, and OpenGL) and this interface does not provide a method to scale point sizes. That's why changing the point size no longer works. Unfortunately, there isn't an easy way to emulate OpenGL's point sprite approach through RHI but I do intend to find a solution in the near future. By the way, there is a similar problem with rendering lines: changing the line width has no effect for the same reason.

Best,

Steve

[modenaxe]

thank you @SteveMaas1978!