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104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#ifndef __IMNM_H__
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#define __IMNM_H__
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#pragma once
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namespace MNM
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{
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namespace Constants
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{
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enum Edges
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{
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InvalidEdgeIndex = ~0u
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};
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enum TileIdConstants
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{
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InvalidTileID = 0,
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};
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enum TriangleIDConstants
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{
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InvalidTriangleID = 0,
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};
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enum EStaticIsland
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{
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eStaticIsland_InvalidIslandID = 0,
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eStaticIsland_FirstValidIslandID = 1,
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};
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enum EGlobalIsland
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{
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eGlobalIsland_InvalidIslandID = 0,
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};
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enum EOffMeshLink
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{
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eOffMeshLinks_InvalidOffMeshLinkID = 0,
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};
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}
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// ------------------------------------------------------------------------------------------
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// Basic types used in the MNM namespace
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typedef uint32 TileID;
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typedef uint32 TriangleID;
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typedef uint32 OffMeshLinkID;
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// StaticIslandIDs identify triangles that are statically connected inside a mesh
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// and that are reachable without the use of any off mesh links.
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typedef uint32 StaticIslandID;
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// GlobalIslandIDs define IDs able to code and connect islands between meshes.
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struct GlobalIslandID
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{
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GlobalIslandID(const uint64 defaultValue = MNM::Constants::eGlobalIsland_InvalidIslandID)
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: id(defaultValue)
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{
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STATIC_ASSERT(sizeof(StaticIslandID) <= 4, "The maximum supported size for StaticIslandIDs is 4 bytes.");
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}
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GlobalIslandID(const uint32 navigationMeshID, const MNM::StaticIslandID islandID)
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{
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id = ((uint64)navigationMeshID << 32) | islandID;
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}
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GlobalIslandID operator=(const GlobalIslandID other)
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{
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id = other.id;
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return *this;
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}
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inline bool operator==(const GlobalIslandID& rhs) const
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{
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return id == rhs.id;
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}
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inline bool operator<(const GlobalIslandID& rhs) const
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{
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return id < rhs.id;
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}
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MNM::StaticIslandID GetStaticIslandID() const
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{
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return (MNM::StaticIslandID) (id & ((uint64)1 << 32) - 1);
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}
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uint32 GetNavigationMeshIDAsUint32() const
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{
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return static_cast<uint32>(id >> 32);
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}
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uint64 id;
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};
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}
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#endif // __IMNM_H__
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