96 lines
4.6 KiB
C#
96 lines
4.6 KiB
C#
// Crest Water System
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// Copyright © 2024 Wave Harmonic. All rights reserved.
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using UnityEngine;
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using UnityEngine.Experimental.Rendering;
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using WaveHarmonic.Crest.Utility;
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namespace WaveHarmonic.Crest
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{
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/// <summary>
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/// A persistent foam simulation that moves around with a displacement LOD. The input is fully combined water surface shape.
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/// </summary>
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[FilterEnum(nameof(_TextureFormatMode), Filtered.Mode.Exclude, (int)LodTextureFormatMode.Automatic)]
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public sealed partial class FoamLod : PersistentLod
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{
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[Tooltip("Prewarms the simulation on load and teleports.\n\nResults are only an approximation.")]
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[@GenerateAPI]
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[@DecoratedField, SerializeField]
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bool _Prewarm = true;
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[Tooltip("Settings for fine tuning this simulation.")]
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[@Embedded]
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[@GenerateAPI(Getter.Custom)]
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[SerializeField]
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FoamLodSettings _Settings;
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static new class ShaderIDs
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{
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public static readonly int s_MinimumWavesSlice = Shader.PropertyToID("_Crest_MinimumWavesSlice");
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public static readonly int s_FoamMaximum = Shader.PropertyToID("_Crest_FoamMaximum");
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public static readonly int s_FoamFadeRate = Shader.PropertyToID("_Crest_FoamFadeRate");
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public static readonly int s_WaveFoamStrength = Shader.PropertyToID("_Crest_WaveFoamStrength");
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public static readonly int s_WaveFoamCoverage = Shader.PropertyToID("_Crest_WaveFoamCoverage");
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public static readonly int s_ShorelineFoamMaxDepth = Shader.PropertyToID("_Crest_ShorelineFoamMaxDepth");
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public static readonly int s_ShorelineFoamStrength = Shader.PropertyToID("_Crest_ShorelineFoamStrength");
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public static readonly int s_NeedsPrewarming = Shader.PropertyToID("_Crest_NeedsPrewarming");
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public static readonly int s_FoamNegativeDepthPriming = Shader.PropertyToID("_Crest_FoamNegativeDepthPriming");
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}
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internal static readonly Color s_GizmoColor = new(1f, 1f, 1f, 0.5f);
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internal override string ID => "Foam";
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internal override Color GizmoColor => s_GizmoColor;
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private protected override Color ClearColor => Color.black;
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private protected override ComputeShader SimulationShader => WaterResources.Instance.Compute._UpdateFoam;
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private protected override GraphicsFormat RequestedTextureFormat => _TextureFormatMode switch
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{
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LodTextureFormatMode.Performance => GraphicsFormat.R16_SFloat,
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LodTextureFormatMode.Precision => GraphicsFormat.R32_SFloat,
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LodTextureFormatMode.Manual => _TextureFormat,
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_ => throw new System.NotImplementedException(),
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};
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private protected override void SetAdditionalSimulationParameters<T>(T properties)
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{
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base.SetAdditionalSimulationParameters(properties);
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// Prewarm simulation for first frame or teleporting. It will not be the same results as running the
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// simulation for multiple frames - but good enough.
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properties.SetBoolean(ShaderIDs.s_NeedsPrewarming, _Prewarm && _NeedsPrewarmingThisStep);
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properties.SetFloat(ShaderIDs.s_FoamFadeRate, Settings._FoamFadeRate);
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properties.SetFloat(ShaderIDs.s_WaveFoamStrength, Settings._WaveFoamStrength);
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properties.SetFloat(ShaderIDs.s_WaveFoamCoverage, Settings._WaveFoamCoverage);
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properties.SetFloat(ShaderIDs.s_ShorelineFoamMaxDepth, Settings._ShorelineFoamMaximumDepth);
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properties.SetFloat(ShaderIDs.s_ShorelineFoamStrength, Settings._ShorelineFoamStrength);
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properties.SetFloat(ShaderIDs.s_FoamMaximum, Settings.Maximum);
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properties.SetFloat(ShaderIDs.s_FoamNegativeDepthPriming, -Settings._ShorelineFoamPriming);
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properties.SetInteger(ShaderIDs.s_MinimumWavesSlice, Settings.FilterWaves);
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}
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private protected override void GetSubstepData(float timeToSimulate, out int substeps, out float delta)
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{
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substeps = Mathf.FloorToInt(timeToSimulate * _SimulationFrequency);
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delta = substeps > 0 ? (1f / _SimulationFrequency) : 0f;
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}
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internal FoamLod()
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{
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_Enabled = true;
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_TextureFormat = GraphicsFormat.R16_SFloat;
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_SimulationFrequency = 30;
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}
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internal static readonly SortedList<int, ILodInput> s_Inputs = new(Helpers.DuplicateComparison);
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private protected override SortedList<int, ILodInput> Inputs => s_Inputs;
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[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
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static void OnLoad()
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{
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s_Inputs.Clear();
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}
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}
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}
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