86 lines
3 KiB
C#
86 lines
3 KiB
C#
using DatReaderWriter.DBObjs;
|
|
using DatReaderWriter.Enums;
|
|
using DatReaderWriter.Types;
|
|
|
|
namespace AcDream.Core.Vfx;
|
|
|
|
/// <summary>
|
|
/// Exact retail PhysicsScriptTable lookup: hash by raw script type, then scan
|
|
/// that type's entries in stored DAT order for the first upper threshold.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// Port of <c>PhysicsScriptTable::GetScript</c> at <c>0x00521E40</c> and
|
|
/// <c>PhysicsScriptTableData::GetScript</c> at <c>0x00521A20</c>.
|
|
/// </remarks>
|
|
public sealed class PhysicsScriptTableResolver
|
|
{
|
|
private readonly Func<uint, PhysicsScriptTable?> _loadTable;
|
|
|
|
public PhysicsScriptTableResolver(Func<uint, PhysicsScriptTable?> loadTable)
|
|
=> _loadTable = loadTable ?? throw new ArgumentNullException(nameof(loadTable));
|
|
|
|
/// <summary>
|
|
/// Returns the selected PhysicsScript DID, or null for a missing table or
|
|
/// type, an unordered/above-range intensity, or an invalid script DID.
|
|
/// </summary>
|
|
public uint? Resolve(uint tableDid, uint rawScriptType, float intensity)
|
|
=> Resolve(tableDid, rawScriptType, intensity, out _);
|
|
|
|
/// <summary>
|
|
/// Resolves a typed play while preserving a corrupt-DAT exception for the
|
|
/// App owner to diagnose with entity context. A load failure remains a
|
|
/// retail no-play and never corrupts the caller's script FIFO.
|
|
/// </summary>
|
|
public uint? Resolve(
|
|
uint tableDid,
|
|
uint rawScriptType,
|
|
float intensity,
|
|
out Exception? loadFailure)
|
|
{
|
|
loadFailure = null;
|
|
if (!IsPhysicsScriptTableDid(tableDid))
|
|
return null;
|
|
|
|
PhysicsScriptTable? table;
|
|
try
|
|
{
|
|
table = _loadTable(tableDid);
|
|
}
|
|
catch (Exception error)
|
|
{
|
|
loadFailure = error;
|
|
return null;
|
|
}
|
|
if (table is null
|
|
|| table.Id != tableDid
|
|
|| !table.ScriptTable.TryGetValue(
|
|
unchecked((PlayScript)rawScriptType),
|
|
out PhysicsScriptTableData? data))
|
|
{
|
|
return null;
|
|
}
|
|
|
|
// Retail compares intensity <= Mod. Do not sort: equal and duplicate
|
|
// thresholds resolve to the first stored entry. IEEE comparisons make
|
|
// NaN fall through all entries, +infinity fall through finite entries,
|
|
// and -infinity select the first finite threshold.
|
|
foreach (ScriptAndModData entry in data.Scripts)
|
|
{
|
|
if (intensity <= entry.Mod)
|
|
{
|
|
uint scriptDid = entry.ScriptId.DataId;
|
|
return IsPhysicsScriptDid(scriptDid) ? scriptDid : null;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public static bool IsPhysicsScriptDid(uint did) =>
|
|
// AC data IDs encode the DBObj type in the high byte; the remaining
|
|
// 24 bits are the file index and must not be truncated to 16 bits.
|
|
(did & 0xFF000000u) == 0x33000000u;
|
|
|
|
public static bool IsPhysicsScriptTableDid(uint did) =>
|
|
(did & 0xFF000000u) == 0x34000000u;
|
|
}
|