103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
// Copyright (c) Wojciech Figat. All rights reserved.
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#pragma once
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#include "Engine/Core/Math/Vector3.h"
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class PhysicsColliderActor;
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/// <summary>
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/// Contains a contact point data for the collision location.
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/// </summary>
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API_STRUCT(NoDefault) struct FLAXENGINE_API ContactPoint
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{
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DECLARE_SCRIPTING_TYPE_MINIMAL(ContactPoint);
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/// <summary>
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/// The contact point location in the world space.
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/// </summary>
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API_FIELD() Vector3 Point;
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/// <summary>
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/// The separation value (negative implies penetration).
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/// </summary>
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API_FIELD() float Separation;
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/// <summary>
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/// The contact normal.
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/// </summary>
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API_FIELD() Vector3 Normal;
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};
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template<>
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struct TIsPODType<ContactPoint>
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{
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enum { Value = true };
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};
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// The maximum amount of the contact points to be stored within a single collision data (higher amount will be skipped).
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#define COLLISION_NAX_CONTACT_POINTS 8
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/// <summary>
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/// Contains a collision information passed to the OnCollisionEnter/OnCollisionExit events.
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/// </summary>
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API_STRUCT(NoDefault) struct FLAXENGINE_API Collision
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{
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DECLARE_SCRIPTING_TYPE_MINIMAL(Collision);
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/// <summary>
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/// The first collider (this instance).
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/// </summary>
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API_FIELD() PhysicsColliderActor* ThisActor;
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/// <summary>
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/// The second collider (other instance).
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/// </summary>
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API_FIELD() PhysicsColliderActor* OtherActor;
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/// <summary>
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/// The total impulse applied to this contact pair to resolve the collision.
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/// </summary>
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/// <remarks>The total impulse is obtained by summing up impulses applied at all contact points in this collision pair.</remarks>
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API_FIELD() Vector3 Impulse;
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/// <summary>
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/// The linear velocity of the first colliding object (this instance).
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/// </summary>
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API_FIELD() Vector3 ThisVelocity;
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/// <summary>
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/// The linear velocity of the second colliding object (other instance).
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/// </summary>
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API_FIELD() Vector3 OtherVelocity;
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/// <summary>
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/// The amount of valid contact points (less or equal to COLLISION_NAX_CONTACT_POINTS).
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/// </summary>
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API_FIELD() int32 ContactsCount;
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/// <summary>
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/// The contacts locations.
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/// </summary>
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API_FIELD(Internal, NoArray) ContactPoint Contacts[COLLISION_NAX_CONTACT_POINTS];
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public:
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/// <summary>
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/// Gets the relative linear velocity of the two colliding objects.
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/// </summary>
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/// <remarks>Can be used to detect stronger collisions. </remarks>
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Vector3 GetRelativeVelocity() const
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{
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return ThisVelocity - OtherVelocity;
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}
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/// <summary>
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/// Swaps the colliding objects (swaps A with B).
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/// </summary>
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void SwapObjects()
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{
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Swap(ThisActor, OtherActor);
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Swap(ThisVelocity, OtherVelocity);
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}
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};
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