Asriel Camora
40 lines
1.5 KiB
C#
40 lines
1.5 KiB
C#
using Craftimizer.Simulator.Actions;
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using System.Diagnostics.Contracts;
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using System.Numerics;
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using System.Runtime.CompilerServices;
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namespace Craftimizer.Solver.Crafty;
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public struct ActionSet
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{
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private uint bits;
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private static int FromAction(ActionType action) => Simulator.AcceptedActionsLUT[(byte)action];
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private static ActionType ToAction(int index) => Simulator.AcceptedActions[index];
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void AddAction(ActionType action) => bits |= 1u << (FromAction(action) + 1);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void RemoveAction(ActionType action) => bits &= ~(1u << (FromAction(action) + 1));
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[Pure]
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public readonly bool HasAction(ActionType action) => (bits & (1u << (FromAction(action) + 1))) != 0;
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[Pure]
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public readonly ActionType ElementAt(int index) => ToAction(Intrinsics.NthBitSet(bits, index) - 1);
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[Pure]
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public readonly int Count => BitOperations.PopCount(bits);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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//public readonly ActionType SelectRandom(Random random) => ElementAt(random.Next(Count));
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public readonly ActionType SelectRandom(Random random) => First();
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[Pure]
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public readonly ActionType First() => ElementAt(0);
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}
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