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Kristian Bendiksen
4d2a868079
RigStatisticsCalculator::mobileVolumeWeightedMean() accumulated into a sum from an out-parameter that callees were not required to write. Every implementation of the per time step overload has early-return paths that leave the value untouched, as does RigWeightedMeanCalc::weightedMeanOverCells, so indeterminate stack memory could be summed and presented in the UI. Return std::optional<double> from the computation layer instead of using an out-parameter, making "value not available" explicit and impossible to ignore: - RigWeightedMeanCalc::weightedMeanOverCells - RigStatisticsCalculator::mobileVolumeWeightedMean and all overrides Time steps without a computable mean no longer contribute to the accumulated sum, and are excluded from the divisor. Previously they would either add garbage or, with a naive zero initialisation, bias the average towards zero. RigStatisticsDataCache keeps the existing HUGE_VAL marker on its public API via value_or(), so behaviour seen by RigHistogramData and the overlay info is unchanged apart from the fix. Also: - Set m_isVolumeWeightedMeanCalculated in the per time step cache, which was never assigned, so the cached value was recomputed on every call. - Remove a duplicated ensureKnownResultLoaded() call in RigEclipseNativeVisibleCellsStatCalc. Fixes #14766