mirror of
https://github.com/vodemn/m3_lightmeter.git
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32 lines
611 B
Dart
32 lines
611 B
Dart
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import 'package:lightmeter/utils/log_2.dart';
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import 'photography_value.dart';
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class NdValue extends PhotographyValue<int> {
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const NdValue(super.rawValue);
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double get stopReduction => value == 0 ? 0.0 : log2(value);
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@override
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String toString() => 'ND$value';
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}
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/// https://shuttermuse.com/neutral-density-filter-numbers-names/
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const List<NdValue> ndValues = [
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NdValue(0),
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NdValue(2),
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NdValue(4),
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NdValue(8),
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NdValue(16),
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NdValue(32),
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NdValue(64),
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NdValue(128),
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NdValue(256),
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NdValue(512),
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NdValue(1024),
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NdValue(2048),
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NdValue(4096),
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NdValue(8192),
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NdValue(10000),
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];
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