sandpypi/Sand.Core/ParticleRuntimeProfileBuilder.cs

namespace Sand.Core;

public static class ParticleRuntimeProfileBuilder
{
    public static ParticleRuntimeProfile Build(ParticleDef definition)
    {
        return new ParticleRuntimeProfile
        {
            Definition = definition,
            Balance = BuildBalance(definition),
        };
    }

    private static ParticleBalanceProfile BuildBalance(ParticleDef definition)
    {
        return definition.Id switch
        {
            "fire" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                BehaviorKind = ParticleBehaviorKind.Fire,
                LifetimeMultiplier = 1f,
                BurnDecayPerStep = 2.5f,
                AmbientCoolingMultiplier = 0.2f,
                NeighborHeatTransferMultiplier = 0.45f,
                UpwardBias = 1f,
                SideDriftBias = 0.45f,
                FireSpreadChance = 0.14f,
                SmokeSpawnChance = 0.18f,
                EmberSpawnChance = 0.04f,
                HeatEmissionMultiplier = 1.1f,
                MinLifetimeTicks = 18f,
                MaxLifetimeTicks = 40f,
                PhaseTransitionHysteresis = 0f,
            },
            "burning_wood" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                BehaviorKind = ParticleBehaviorKind.BurningWood,
                BurnDecayPerStep = 0.65f,
                AmbientCoolingMultiplier = 0.35f,
                NeighborHeatTransferMultiplier = 0.75f,
                SmokeSpawnChance = 0.14f,
                EmberSpawnChance = 0.025f,
                ProduceChance = 0.12f,
                HeatEmissionMultiplier = 1f,
                FireSpreadChance = 0.08f,
                PressureSensitivity = 0.8f,
                MinLifetimeTicks = 240f,
                MaxLifetimeTicks = 420f,
            },
            "ember" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                BehaviorKind = ParticleBehaviorKind.Ember,
                LifetimeMultiplier = 1f,
                BurnDecayPerStep = 1.5f,
                AmbientCoolingMultiplier = 0.3f,
                NeighborHeatTransferMultiplier = 0.65f,
                UpwardBias = 0.35f,
                SideDriftBias = 0.25f,
                FireSpreadChance = 0.05f,
                SmokeSpawnChance = 0.10f,
                ProduceChance = 0.08f,
                HeatEmissionMultiplier = 0.8f,
                MinLifetimeTicks = 20f,
                MaxLifetimeTicks = 45f,
            },
            "plasma" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                BehaviorKind = ParticleBehaviorKind.Plasma,
                AmbientCoolingMultiplier = 0.1f,
                NeighborHeatTransferMultiplier = 0.5f,
                UpwardBias = 0.95f,
                SideDriftBias = 0.55f,
                FireSpreadChance = 0.18f,
                HeatEmissionMultiplier = 1.6f,
                EnergyTransferMultiplier = 1.75f,
                MinLifetimeTicks = 18f,
                MaxLifetimeTicks = 60f,
            },
            "lava" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                AmbientCoolingMultiplier = 0.05f,
                NeighborHeatTransferMultiplier = 0.12f,
                FireSpreadChance = 0.08f,
                HeatEmissionMultiplier = 1.35f,
                ForceResponseMultiplier = 0.22f,
                LateralFlowMultiplier = 0.38f,
                DiagonalFlowMultiplier = 0.6f,
                PhaseTransitionHysteresis = 60f,
                PressureSensitivity = 1.1f,
            },
            var id when id.StartsWith("molten_", StringComparison.Ordinal) => new ParticleBalanceProfile
            {
                Id = definition.Id,
                AmbientCoolingMultiplier = 0.08f,
                NeighborHeatTransferMultiplier = 0.16f,
                HeatEmissionMultiplier = 1.15f,
                ForceResponseMultiplier = 0.32f,
                LateralFlowMultiplier = 0.5f,
                DiagonalFlowMultiplier = 0.72f,
                PhaseTransitionHysteresis = 45f,
                PressureSensitivity = 1.05f,
            },
            "steam" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                AmbientCoolingMultiplier = 0.2f,
                NeighborHeatTransferMultiplier = 0.45f,
                PhaseTransitionHysteresis = 15f,
            },
            "smoke" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                LifetimeMultiplier = 1.25f,
                AmbientCoolingMultiplier = 0.25f,
                UpwardBias = 0.4f,
                SideDriftBias = 0.2f,
                MinLifetimeTicks = 100f,
                MaxLifetimeTicks = 140f,
            },
            "ice" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                AmbientCoolingMultiplier = 0.15f,
                NeighborHeatTransferMultiplier = 0.4f,
                PhaseTransitionHysteresis = 24f,
            },
            "snow" => new ParticleBalanceProfile
            {
                Id = definition.Id,
                AmbientCoolingMultiplier = 0.22f,
                NeighborHeatTransferMultiplier = 0.5f,
                PhaseTransitionHysteresis = 18f,
            },
            _ => new ParticleBalanceProfile
            {
                Id = definition.Id,
                BurnDecayPerStep = 1f,
            },
        };
    }
}