66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <Jolt/Physics/Body/BodyID.h>
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#include <Jolt/Physics/Collision/Shape/SubShapeID.h>
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#include <Jolt/Core/HashCombine.h>
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JPH_NAMESPACE_BEGIN
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/// A pair of bodies and their sub shape ID's. Can be used as a key in a map to find a contact point.
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class SubShapeIDPair
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{
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public:
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JPH_OVERRIDE_NEW_DELETE
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/// Constructor
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SubShapeIDPair() = default;
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SubShapeIDPair(const BodyID &inBody1ID, const SubShapeID &inSubShapeID1, const BodyID &inBody2ID, const SubShapeID &inSubShapeID2) : mBody1ID(inBody1ID), mSubShapeID1(inSubShapeID1), mBody2ID(inBody2ID), mSubShapeID2(inSubShapeID2) { }
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SubShapeIDPair & operator = (const SubShapeIDPair &) = default;
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SubShapeIDPair(const SubShapeIDPair &) = default;
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/// Equality operator
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inline bool operator == (const SubShapeIDPair &inRHS) const
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{
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return UVec4::sLoadInt4(reinterpret_cast<const uint32 *>(this)) == UVec4::sLoadInt4(reinterpret_cast<const uint32 *>(&inRHS));
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}
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/// Less than operator, used to consistently order contact points for a deterministic simulation
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inline bool operator < (const SubShapeIDPair &inRHS) const
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{
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if (mBody1ID != inRHS.mBody1ID)
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return mBody1ID < inRHS.mBody1ID;
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if (mSubShapeID1.GetValue() != inRHS.mSubShapeID1.GetValue())
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return mSubShapeID1.GetValue() < inRHS.mSubShapeID1.GetValue();
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if (mBody2ID != inRHS.mBody2ID)
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return mBody2ID < inRHS.mBody2ID;
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return mSubShapeID2.GetValue() < inRHS.mSubShapeID2.GetValue();
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}
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const BodyID & GetBody1ID() const { return mBody1ID; }
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const SubShapeID & GetSubShapeID1() const { return mSubShapeID1; }
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const BodyID & GetBody2ID() const { return mBody2ID; }
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const SubShapeID & GetSubShapeID2() const { return mSubShapeID2; }
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uint64 GetHash() const { return HashBytes(this, sizeof(SubShapeIDPair)); }
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private:
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BodyID mBody1ID;
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SubShapeID mSubShapeID1;
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BodyID mBody2ID;
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SubShapeID mSubShapeID2;
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};
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static_assert(sizeof(SubShapeIDPair) == 16, "Unexpected size");
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static_assert(alignof(SubShapeIDPair) == 4, "Assuming 4 byte aligned");
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JPH_NAMESPACE_END
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JPH_MAKE_STD_HASH(JPH::SubShapeIDPair)
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