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Sliders, Drags: adjust ScaleValueFromRatioT() to increase remapping precision (in theory). (#9536)

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Omar: couldn't detect any output difference in test suite with large u64/s64 ranges drag/sliders.
I believe this is entirely theoretical and it's principal value is to shut Linter warnings
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slowriot 2026-09-03 14:42:24 +01:00 • committed by GitHub
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imgui_widgets.cpp
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@ -3091,7 +3091,7 @@ TYPE ImGui::ScaleValueFromRatioT(ImGuiDataType data_type, float t, TYPE v_min, T
// This code is carefully tuned to work with large values (e.g. high ranges of U64) while preserving this property..
// - Not doing a *1.0 multiply at the end of a range as it tends to be lossy. While absolute aiming at a large s64/u64
// range is going to be imprecise anyway, with this check we at least make the edge values matches expected limits.
FLOATTYPE v_new_off_f = (SIGNEDTYPE)(v_max - v_min) * t;
FLOATTYPE v_new_off_f = (FLOATTYPE)(SIGNEDTYPE)(v_max - v_min) * (FLOATTYPE)t;
result = (TYPE)((SIGNEDTYPE)v_min + (SIGNEDTYPE)(v_new_off_f + (FLOATTYPE)(v_min > v_max ? -0.5 : 0.5)));
}
}