Luis Gonzalez
42 lines
1.7 KiB
C#
42 lines
1.7 KiB
C#
using Unity.Burst;
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using Unity.Entities;
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using Unity.Mathematics;
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using Unity.NetCode;
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using Unity.Transforms;
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namespace ProjectM.Simulation
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{
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/// <summary>
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/// Canonical predicted system: advances each player's planar (XZ) position from twin-stick Move
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/// input. Runs inside the prediction loop on the owning client (re-simulated on rollback) and
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/// once per tick on the server; filtered to <see cref="Simulate"/> so only predicted ghosts move.
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/// Deterministic by construction: uses <c>SystemAPI.Time.DeltaTime</c> (the fixed tick step)
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/// only — no wall-clock, no <c>System.Random</c>. Move is clamped to unit length so diagonal
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/// keyboard movement is not faster than cardinal. Move speed is the data-driven
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/// <see cref="EffectiveCharacterStats.MoveSpeed"/> (authored base + active modifiers), recomputed
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/// each tick by <see cref="StatRecomputeSystem"/> which runs before this system.
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/// </summary>
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[UpdateInGroup(typeof(PredictedSimulationSystemGroup))]
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[BurstCompile]
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public partial struct PlayerMoveSystem : ISystem
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{
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[BurstCompile]
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public void OnUpdate(ref SystemState state)
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{
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float dt = SystemAPI.Time.DeltaTime;
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foreach (var (transform, input, stats) in
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SystemAPI.Query<RefRW<LocalTransform>, RefRO<PlayerInput>, RefRO<EffectiveCharacterStats>>()
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.WithAll<Simulate>())
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{
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float2 move = input.ValueRO.Move;
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if (math.lengthsq(move) > 1f)
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move = math.normalize(move);
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float3 delta = new float3(move.x, 0f, move.y) * stats.ValueRO.MoveSpeed * dt;
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transform.ValueRW.Position += delta;
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}
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}
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}
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}
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