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Oct 4, 2026
| msg_info("SofaGLFW") << "Batch mode: computing " << targetNbIterations << " iterations."; | ||
| startAnim = true; | ||
| } | ||
| else if (isOffscreen) |
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I think we might never fall into this case since nb_iterations is cast as std::size_t
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? 🤔
If I nb_iterations is '0' (not set or given as argument),
auto targetNbIterations = result["nb_iterations"].as<std::size_t>(); will make targetNbIterations == 0 therefore going into the else.
And it works, at least on my setup at least:
./bin/runSofaGLFW --offscreen
....
[WARNING] [InteractiveCamera(InteractiveCamera1)] Too many missing parameters ; taking default ...
[WARNING] [SofaGLFW] Offscreen mode without a number of iterations (--nb_iterations): the simulation will run until the process is interrupted.
| /// than once is a no-op. | ||
| static int RegisterGUIParameters(sofa::gui::common::ArgumentParser* argumentParser); | ||
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| /// Number of iterations requested with the '-n'/'--nbIter' argument of the batch GUI; |
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I could actually not trigger infinite iterations with -n=0 option, could you?
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yes, you have to write -n 0, not -n=0
like batch actually
Render without showing anything on screen, while still calling all the graphics functions: the window and its OpenGL context are created as usual, they are simply never mapped on screen (GLFW_VISIBLE hint). Available as '--offscreen' in runSofaGLFW, and in runSofa with the glfw and imgui GUIs. SofaGLFWGUI::RegisterGUIParameters() declares it for both of them: GUIManager declares the parameters of every registered GUI, so the function guards against a second registration. Fullscreen is ignored in offscreen mode, and switchFullScreen() (F11) is refused, since it would map the window.
'-n'/'--nbIter' only stopped the batch GUI; with glfw or imgui the simulation ran until the window was closed, which made it impossible to run a bounded simulation while still rendering, e.g. together with '--offscreen'. The argument is registered by the batch GUI, and cxxopts refuses a duplicate, so it is not declared a second time: SofaGLFWGUI keeps the ArgumentParser given to RegisterGUIParameters and reads the already parsed value in mainLoop(). Only arguments actually present on the command line end up in the parse result, hence the simulation keeps running indefinitely when '-n' is not given. 'infinite' is supported as in the batch GUI.
The imgui GUI is the glfw one plus interactive widgets, so rendering it without ever showing the window serves no purpose.
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Based on
Add a new feature to render without opening any window.
Only usable with glfw GUI (as the imgui is by definition interactive in my opinion)
add 2 flags:
Note that you still need opengl/context/ whatever stuff like that of course