sandpypi/Sand.ChunkPrototype/PrototypeSparseSandAdapter.Runtime.Lifecycle.cs

using Sand.Core;

namespace Sand.ChunkPrototype;

public sealed partial class PrototypeSparseSandAdapter
{
    private void TickCellAging(int x, int y, PrototypeParticle particle)
    {
        if (!TryGetCellPage(x, y, out _, out var page, out var localX, out var localY))
        {
            return;
        }

        page.SetCellAge(localX, localY, page.GetCellAge(localX, localY) + 1f);
        if (page.GetIntegrity(localX, localY) < particle.Durability)
        {
            page.SetIntegrity(localX, localY, MathF.Min(particle.Durability, page.GetIntegrity(localX, localY) + MathF.Max(0.02f, particle.Hardness * 0.03f)));
        }
    }

    private bool TickLifetime(int x, int y, ref PrototypeParticle particle)
    {
        if (!TryGetCellPage(x, y, out _, out var page, out var localX, out var localY))
        {
            return false;
        }

        var lifetime = page.GetLifetime(localX, localY);
        if (lifetime > 0f)
        {
            lifetime -= 1f;
            page.SetLifetime(localX, localY, lifetime);
        }

        if (lifetime <= 0f && particle.DefaultLifetime > 0f)
        {
            if (particle.MotionType == PrototypeParticleType.Steam && particle.SolidifyTypeId != 0 && TryResolveProfile(particle.SolidifyTypeId, out var condensed))
            {
                var currentTemperature = GetTemperatureAt(x, y);
                ReplaceParticle(x, y, condensed);
                if (TryGetCellPage(x, y, out _, out var targetPage, out var targetLocalX, out var targetLocalY))
                {
                    targetPage.SetTemperature(targetLocalX, targetLocalY, MathF.Max(condensed.InitialTemperature, MathF.Min(currentTemperature, 95f)));
                }

                particle = condensed;
                return false;
            }

            RemoveParticle(x, y);
            return true;
        }

        return false;
    }

    private void AutoIgnite(int x, int y, PrototypeParticle particle)
    {
        if (!TryGetCellPage(x, y, out _, out var page, out var localX, out var localY))
        {
            return;
        }

        if (page.GetBurning(localX, localY) == 0 &&
            particle.BurnTemperature > 0f &&
            GetTemperatureAt(x, y) >= particle.BurnTemperature &&
            particle.Flamability > 0f)
        {
            page.SetBurning(localX, localY, 1);
            page.SetBurnTime(localX, localY, MathF.Max(particle.BurnDuration, 1f));
        }
    }

    private void ApplyRuntimeEmissionAndProduction(int x, int y, PrototypeParticle particle, ref int seed)
    {
        var isEffectEmitter =
            particle.BehaviorKind is ParticleBehaviorKind.Fire or ParticleBehaviorKind.BurningWood or ParticleBehaviorKind.Ember or ParticleBehaviorKind.Plasma;
        var emission = particle.HeatEmission;
        if (particle.BehaviorKind == ParticleBehaviorKind.Fire && emission <= 0f)
        {
            emission = 24f;
        }
        else if (particle.BehaviorKind == ParticleBehaviorKind.Plasma && emission <= 0f)
        {
            emission = 80f;
        }
        else if (particle.BehaviorKind == ParticleBehaviorKind.Ember && emission <= 0f)
        {
            emission = 12f;
        }
        else if (particle.IsMolten && emission <= 0f)
        {
            emission = particle.TypeId != 0 ? 28f : 0f;
        }

        if (emission > 0f)
        {
            ApplyHeatEmission(x, y, emission);
        }

        if ((isEffectEmitter || IsBurningAt(x, y)) && particle.ProduceTypeId != 0 && NextChance(ref seed) <= 0.08f)
        {
            TrySpawnAtOffset(x, y, 0, -1, particle.ProduceTypeId);
        }

        if (particle.SmokeSpawnChance > 0f && isEffectEmitter && TryFindProfileById("smoke", out var smoke) && NextChance(ref seed) <= particle.SmokeSpawnChance)
        {
            TrySpawnAtOffset(x, y, 0, -1, smoke.TypeId);
        }

        if (particle.EmberSpawnChance > 0f && isEffectEmitter && TryFindProfileById("ember", out var ember) && NextChance(ref seed) <= particle.EmberSpawnChance)
        {
            TrySpawnAtOffset(x, y, 0, -1, ember.TypeId);
        }
    }

    private bool TickBurning(int x, int y, ref PrototypeParticle particle)
    {
        if (!TryGetCellPage(x, y, out _, out var page, out var localX, out var localY) || page.GetBurning(localX, localY) == 0)
        {
            return false;
        }

        page.SetTemperature(localX, localY, page.GetTemperature(localX, localY) + 1.5f + (particle.HeatEmission * 0.02f));
        page.SetBurnTime(localX, localY, page.GetBurnTime(localX, localY) - MathF.Max(0.05f, particle.BurnRate));
        if (page.GetBurnTime(localX, localY) > 0f)
        {
            return false;
        }

        RemoveParticle(x, y);
        return true;
    }

    private bool TickSpecialBehavior(int x, int y, PrototypeParticle particle, ref int seed)
    {
        var temperature = GetTemperatureAt(x, y);
        switch (particle.BehaviorKind)
        {
            case ParticleBehaviorKind.Fire:
                if (temperature < 120f && NextChance(ref seed) <= 0.1f)
                {
                    RemoveParticle(x, y);
                    return true;
                }
                break;
            case ParticleBehaviorKind.Ember:
                if (temperature < 60f && NextChance(ref seed) <= 0.1f)
                {
                    RemoveParticle(x, y);
                    return true;
                }
                break;
            case ParticleBehaviorKind.BurningWood:
                if (particle.EmberSpawnChance > 0f && TryFindProfileById("ember", out var ember) && NextChance(ref seed) <= particle.EmberSpawnChance * 0.5f)
                {
                    TrySpawnAtOffset(x, y, 0, -1, ember.TypeId);
                }
                break;
        }

        return false;
    }

    private bool IsBurningAt(int x, int y)
    {
        if (!TryGetCellPage(x, y, out _, out var page, out var localX, out var localY))
        {
            return false;
        }

        return page.GetBurning(localX, localY) != 0;
    }

    private bool TrySpawnAtOffset(int x, int y, int offsetX, int offsetY, ushort typeId)
    {
        var tx = x + offsetX;
        var ty = y + offsetY;
        if (!InBounds(tx, ty) || HasParticle(tx, ty) || !TryResolveProfile(typeId, out var particle))
        {
            return false;
        }

        return AddParticle(tx, ty, particle);
    }
}