BodyPair.h

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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <Jolt/Physics/Body/BodyID.h>
#include <Jolt/Core/HashCombine.h>
 
JPH_NAMESPACE_BEGIN
 
struct alignas(uint64) BodyPair
{
    JPH_OVERRIDE_NEW_DELETE
 
                            BodyPair() = default;
                            BodyPair(BodyID inA, BodyID inB)                            : mBodyA(inA), mBodyB(inB) { }
 
    bool                    operator == (const BodyPair &inRHS) const                   { return *reinterpret_cast<const uint64 *>(this) == *reinterpret_cast<const uint64 *>(&inRHS); }
 
    bool                    operator < (const BodyPair &inRHS) const                    { return *reinterpret_cast<const uint64 *>(this) < *reinterpret_cast<const uint64 *>(&inRHS); }
 
    uint64                  GetHash() const                                             { return Hash64(*reinterpret_cast<const uint64 *>(this)); }
 
    BodyID                  mBodyA;
    BodyID                  mBodyB;
};
 
static_assert(sizeof(BodyPair) == sizeof(uint64), "Mismatch in class size");
 
JPH_NAMESPACE_END