1e98d81448
Preserve canonical live-object ownership across Hidden transitions and remote teleport placement so effects, collision, streaming, and targeting remain synchronized.
60 lines
2.8 KiB
C#
60 lines
2.8 KiB
C#
using System.Numerics;
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namespace AcDream.Core.Physics;
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/// <summary>
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/// Result of <see cref="PhysicsEngine.Resolve"/>: the validated
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/// position after collision, the cell the entity ended up in,
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/// and whether they're standing on a surface.
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///
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/// <para>
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/// L.3a (2026-04-30): added optional collision-normal fields so the
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/// caller (typically <see cref="AcDream.App.Input.PlayerMovementController"/>)
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/// can apply retail's velocity-reflection bounce
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/// (<c>v_new = v - (1 + elasticity) * dot(v, n) * n</c>) to the
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/// PhysicsBody after the geometric resolve completes. ACE port mirror:
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/// <c>references/ACE/Source/ACE.Server/Physics/PhysicsObj.cs:2692-2697</c>;
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/// retail equivalent: <c>CPhysicsObj::handle_all_collisions</c> at
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/// <c>acclient_2013_pseudo_c.txt:282699-282715</c>.
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/// </para>
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/// </summary>
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public readonly record struct ResolveResult(
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Vector3 Position,
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uint CellId,
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bool IsOnGround,
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/// <summary>True when a wall collision occurred during this resolve
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/// and <see cref="CollisionNormal"/> is meaningful.</summary>
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bool CollisionNormalValid = false,
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/// <summary>Outward surface normal of the wall the sphere hit. Used
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/// by the velocity-reflection step. Pointing away from the wall.</summary>
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Vector3 CollisionNormal = default,
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/// <summary>Render Residual A — whether the underlying
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/// <c>FindTransitionalPosition</c> found a valid position (retail
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/// <c>find_valid_position != 0</c>, pc:273898). False when the sweep had no
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/// start cell or was immediately stuck. The camera <c>SweepEye</c> reads this
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/// to trigger <c>SmartBox::update_viewer</c>'s fallbacks. Default <c>true</c>
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/// so existing callers are unaffected.</summary>
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bool Ok = true,
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/// <summary>
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/// Final transition orientation. Projectile callers consume the
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/// interpolated frame committed before a PathClipped collision; legacy
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/// point/capsule callers leave this at identity and ignore it.
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/// </summary>
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Quaternion Orientation = default,
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/// <summary>
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/// Exact retail SetPositionInternal contact-plane-valid result. This is
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/// distinct from <see cref="OnWalkable"/>: a steep surface may be contact
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/// without being ground.
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/// </summary>
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bool InContact = false,
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/// <summary>
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/// Exact retail walkability result after testing the contact-plane normal
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/// against <see cref="PhysicsGlobals.FloorZ"/>.
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/// </summary>
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bool OnWalkable = false,
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/// <summary>The accepted SetPosition contact plane, when present.</summary>
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Plane ContactPlane = default,
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/// <summary>Full cell that owns <see cref="ContactPlane"/>.</summary>
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uint ContactPlaneCellId = 0,
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/// <summary>Whether the accepted contact plane is water.</summary>
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bool ContactPlaneIsWater = false);
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