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++ // Copyright (C) 2023 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef STATICPHYSXOBJECTS_H
++ #define STATICPHYSXOBJECTS_H
++
++ //
++ // W A R N I N G
++ // -------------
++ //
++ // This file is not part of the Qt API. It exists purely as an
++ // implementation detail. This header file may change from version to
++ // version without notice, or even be removed.
++ //
++ // We mean it.
++ //
++
++ #include "qtconfigmacros.h"
++
++ #include <QtCore/qhash.h>
++
++ #include "extensions/PxDefaultAllocator.h"
++ #include "extensions/PxDefaultErrorCallback.h"
++
++ namespace physx {
++ class PxFoundation;
++ class PxPhysics;
++ class PxDefaultCpuDispatcher;
++ class PxMaterial;
++ }
++
++ QT_BEGIN_NAMESPACE
++
++ // The properties of a physics material. PhysX allows at most 64K materials, so instead of
++ // creating one per node, all nodes needing the same properties share a single PxMaterial. This
++ // means the materials must be treated as immutable: a node whose properties change is moved to
++ // the material with the new properties instead.
++ struct PhysicsMaterialProperties
++ {
++ float staticFriction = 0.f;
++ float dynamicFriction = 0.f;
++ float restitution = 0.f;
++
++ // Properties that no material can have, since friction and restitution are never negative.
++ // Used by the nodes to tell that they have not picked up a material yet.
++ static constexpr PhysicsMaterialProperties none() { return { -1.f, -1.f, -1.f }; }
++
++ friend bool operator==(const PhysicsMaterialProperties &lhs,
++ const PhysicsMaterialProperties &rhs) noexcept
++ {
++ return lhs.staticFriction == rhs.staticFriction
++ && lhs.dynamicFriction == rhs.dynamicFriction
++ && lhs.restitution == rhs.restitution;
++ }
++
++ friend size_t qHash(const PhysicsMaterialProperties &properties, size_t seed = 0) noexcept
++ {
++ return qHashMulti(seed, properties.staticFriction, properties.dynamicFriction,
++ properties.restitution);
++ }
++ };
++
++ struct SharedPhysicsMaterial
++ {
++ physx::PxMaterial *material = nullptr;
++ int nodeCount = 0;
++ };
++
++ struct StaticPhysXObjects
++ {
++ physx::PxDefaultErrorCallback defaultErrorCallback;
++ physx::PxDefaultAllocator defaultAllocatorCallback;
++ physx::PxFoundation *foundation = nullptr;
++ physx::PxPhysics *physics = nullptr;
++ physx::PxDefaultCpuDispatcher *dispatcher = nullptr;
++
++ // The materials in use, one per distinct set of properties, and how many nodes use each.
++ // They belong to 'physics' and are destroyed together with it.
++ QHash<PhysicsMaterialProperties, SharedPhysicsMaterial> materials;
++
++ unsigned int foundationRefCount = 0;
++ bool foundationCreated = false;
++ bool physicsCreated = false;
++
++ static StaticPhysXObjects &getReference();
++ };
++
++ QT_END_NAMESPACE
++
++ #endif