using AcDream.Core.Meshing;

namespace AcDream.App.Rendering.Wb;

/// <summary>
/// Bucket identity for <see cref="WbDrawDispatcher"/>'s per-frame group dictionary.
/// Two (entity, batch) pairs that share the same <see cref="GroupKey"/> render
/// in a single <c>glMultiDrawElementsIndirect</c> draw command. Promoted to
/// <c>internal</c> at file scope (was a private nested type) so
/// <see cref="EntityClassificationCache"/> can store it inside <see cref="CachedBatch"/>
/// without depending on dispatcher internals.
/// </summary>
internal readonly record struct GroupKey(
    uint Ibo,
    uint FirstIndex,
    int BaseVertex,
    int IndexCount,
    ulong BindlessTextureHandle,
    uint TextureLayer,
    TranslucencyKind Translucency);