using System.Numerics;

namespace AcDream.Core.Physics;

/// <summary>
/// One collision-bearing shape attached to a logical PhysicsObj.
/// A door emits 3-4 (CylSphere(s) + Sphere(s) + Part-BSPs); a creature
/// may emit a few; a simple item zero. Positions and rotations are
/// LOCAL to the entity's origin so <see cref="ShadowObjectRegistry.UpdatePosition"/>
/// can re-transform them when the entity moves.
///
/// <para>
/// Retail anchor: <c>CPhysicsPart</c> + <c>CPhysicsPart::find_obj_collisions</c>
/// at <c>acclient_2013_pseudo_c.txt:275045-275055</c>. Each part stores its
/// own transform and dispatches per-part collision to its GfxObj.
/// </para>
/// </summary>
public readonly record struct ShadowShape(
    uint                GfxObjId,
    Vector3             LocalPosition,
    Quaternion          LocalRotation,
    float               Scale,
    ShadowCollisionType CollisionType,
    float               Radius,
    float               CylHeight);