Do not use off mesh connections as a part of navmesh cache key

To reduce cache size and make it more flexible.

Adding off mesh connections to the navmesh is the last step of navmesh
generation and it's very fast comparing to other steps (microseconds vs
milliseconds). Having less cache size makes get and set operations almost 2x
times faster that also have an order of microseconds. So in total there is
no performance impact.

apps/benchmarks/detournavigator/navmeshtilescache.cpp

@@ -15,13 +15,12 @@ namespace
         osg::Vec3f mAgentHalfExtents;
         TilePosition mTilePosition;
         RecastMesh mRecastMesh;
-        std::vector<OffMeshConnection> mOffMeshConnections;
     };
 
     struct Item
     {
         Key mKey;
-        NavMeshData mValue;
+        PreparedNavMeshData mValue;
     };
 
     template <typename Random>
@@ -105,8 +104,7 @@ namespace
         generateWater(std::back_inserter(water), 2, random);
         RecastMesh recastMesh(generation, revision, std::move(indices), std::move(vertices),
                               std::move(areaTypes), std::move(water));
-        std::vector<OffMeshConnection> offMeshConnections;
+        return Key {agentHalfExtents, tilePosition, std::move(recastMesh)};
-        return Key {agentHalfExtents, tilePosition, std::move(recastMesh), std::move(offMeshConnections)};
     }
 
     constexpr std::size_t trianglesPerTile = 310;
@@ -125,7 +123,8 @@ namespace
         while (true)
         {
             Key key = generateKey(trianglesPerTile, random);
-            cache.set(key.mAgentHalfExtents, key.mTilePosition, key.mRecastMesh, key.mOffMeshConnections, NavMeshData());
+            cache.set(key.mAgentHalfExtents, key.mTilePosition, key.mRecastMesh,
+                      std::make_unique<PreparedNavMeshData>());
             *out++ = std::move(key);
             const std::size_t newSize = cache.getStats().mNavMeshCacheSize;
             if (size >= newSize)
@@ -147,7 +146,7 @@ namespace
         while (state.KeepRunning())
         {
             const auto& key = keys[n++ % keys.size()];
-            const auto result = cache.get(key.mAgentHalfExtents, key.mTilePosition, key.mRecastMesh, key.mOffMeshConnections);
+            const auto result = cache.get(key.mAgentHalfExtents, key.mTilePosition, key.mRecastMesh);
             benchmark::DoNotOptimize(result);
         }
     }
@@ -175,7 +174,8 @@ namespace
         while (state.KeepRunning())
         {
             const auto& key = keys[n++ % keys.size()];
-            const auto result = cache.set(key.mAgentHalfExtents, key.mTilePosition, key.mRecastMesh, key.mOffMeshConnections, NavMeshData());
+            const auto result = cache.set(key.mAgentHalfExtents, key.mTilePosition, key.mRecastMesh,
+                                          std::make_unique<PreparedNavMeshData>());
             benchmark::DoNotOptimize(result);
         }
     }

apps/openmw_test_suite/detournavigator/navmeshtilescache.cpp

@@ -3,24 +3,131 @@
 #include <components/detournavigator/navmeshtilescache.hpp>
 #include <components/detournavigator/exceptions.hpp>
 #include <components/detournavigator/recastmesh.hpp>
+#include <components/detournavigator/preparednavmeshdata.hpp>
+#include <components/detournavigator/ref.hpp>
+#include <components/detournavigator/preparednavmeshdatatuple.hpp>
+
+#include <RecastAlloc.h>
 
 #include <LinearMath/btTransform.h>
 
 #include <gtest/gtest.h>
 
-namespace DetourNavigator
+#include <random>
-{
+#include <stdexcept>
-    static inline bool operator ==(const NavMeshDataRef& lhs, const NavMeshDataRef& rhs)
-    {
-        return std::make_pair(lhs.mValue, lhs.mSize) == std::make_pair(rhs.mValue, rhs.mSize);
-    }
-}
 
 namespace
 {
     using namespace testing;
     using namespace DetourNavigator;
 
+    void* permRecastAlloc(int size)
+    {
+        void* result = rcAlloc(static_cast<std::size_t>(size), RC_ALLOC_PERM);
+        if (result == nullptr)
+            throw std::bad_alloc();
+        return result;
+    }
+
+    template <class T>
+    void generate(T*& values, int size)
+    {
+        values = static_cast<T*>(permRecastAlloc(size * sizeof(T)));
+        std::generate_n(values, static_cast<std::size_t>(size), [] { return static_cast<T>(std::rand()); });
+    }
+
+    void generate(rcPolyMesh& value, int size)
+    {
+        value.nverts = size;
+        value.maxpolys = size;
+        value.nvp = size;
+        value.npolys = size;
+        rcVcopy(value.bmin, osg::Vec3f(-1, -2, -3).ptr());
+        rcVcopy(value.bmax, osg::Vec3f(3, 2, 1).ptr());
+        value.cs = 1.0f / (std::rand() % 999 + 1);
+        value.ch = 1.0f / (std::rand() % 999 + 1);
+        value.borderSize = std::rand();
+        value.maxEdgeError = 1.0f / (std::rand() % 999 + 1);
+        generate(value.verts, 3 * value.nverts);
+        generate(value.polys, value.maxpolys * 2 * value.nvp);
+        generate(value.regs, value.maxpolys);
+        generate(value.flags, value.maxpolys);
+        generate(value.areas, value.maxpolys);
+    }
+
+    void generate(rcPolyMeshDetail& value, int size)
+    {
+        value.nmeshes = size;
+        value.nverts = size;
+        value.ntris = size;
+        generate(value.meshes, 4 * value.nmeshes);
+        generate(value.verts, 3 * value.nverts);
+        generate(value.tris, 4 * value.ntris);
+    }
+
+    void generate(PreparedNavMeshData& value, int size)
+    {
+        value.mUserId = std::rand();
+        value.mCellHeight = 1.0f / (std::rand() % 999 + 1);
+        value.mCellSize = 1.0f / (std::rand() % 999 + 1);
+        generate(value.mPolyMesh, size);
+        generate(value.mPolyMeshDetail, size);
+    }
+
+    std::unique_ptr<PreparedNavMeshData> makePeparedNavMeshData(int size)
+    {
+        auto result = std::make_unique<PreparedNavMeshData>();
+        generate(*result, size);
+        return result;
+    }
+
+    template <class T>
+    void clone(const T* src, T*& dst, int size)
+    {
+        dst = static_cast<T*>(permRecastAlloc(size * sizeof(T)));
+        std::memcpy(dst, src, static_cast<std::size_t>(size) * sizeof(T));
+    }
+
+    void clone(const rcPolyMesh& src, rcPolyMesh& dst)
+    {
+        dst.nverts = src.nverts;
+        dst.npolys = src.npolys;
+        dst.maxpolys = src.maxpolys;
+        dst.nvp = src.nvp;
+        rcVcopy(dst.bmin, src.bmin);
+        rcVcopy(dst.bmax, src.bmax);
+        dst.cs = src.cs;
+        dst.ch = src.ch;
+        dst.borderSize = src.borderSize;
+        dst.maxEdgeError = src.maxEdgeError;
+        clone(src.verts, dst.verts, 3 * dst.nverts);
+        clone(src.polys, dst.polys, dst.maxpolys * 2 * dst.nvp);
+        clone(src.regs, dst.regs, dst.maxpolys);
+        clone(src.flags, dst.flags, dst.maxpolys);
+        clone(src.areas, dst.areas, dst.maxpolys);
+    }
+
+    void clone(const rcPolyMeshDetail& src, rcPolyMeshDetail& dst)
+    {
+        dst.nmeshes = src.nmeshes;
+        dst.nverts = src.nverts;
+        dst.ntris = src.ntris;
+        clone(src.meshes, dst.meshes, 4 * dst.nmeshes);
+        clone(src.verts, dst.verts, 3 * dst.nverts);
+        clone(src.tris, dst.tris, 4 * dst.ntris);
+    }
+
+    std::unique_ptr<PreparedNavMeshData> clone(const PreparedNavMeshData& value)
+    {
+        auto result = std::make_unique<PreparedNavMeshData>();
+        result->mUserId = value.mUserId;
+        result->mCellHeight = value.mCellHeight;
+        result->mCellSize = value.mCellSize;
+        clone(value.mPolyMesh, result->mPolyMesh);
+        clone(value.mPolyMeshDetail, result->mPolyMeshDetail);
+        return result;
+    }
+
     struct DetourNavigatorNavMeshTilesCacheTest : Test
     {
         const osg::Vec3f mAgentHalfExtents {1, 2, 3};
@@ -32,17 +139,11 @@ namespace
         const std::vector<AreaType> mAreaTypes {1, AreaType_ground};
         const std::vector<RecastMesh::Water> mWater {};
         const RecastMesh mRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, mWater};
-        const std::vector<OffMeshConnection> mOffMeshConnections {};
+        std::unique_ptr<PreparedNavMeshData> mPreparedNavMeshData {makePeparedNavMeshData(3)};
-        unsigned char* const mData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
-        NavMeshData mNavMeshData {mData, 1};
 
-        const size_t cRecastMeshKeySize = mRecastMesh.getIndices().size() * sizeof(int)
+        const std::size_t mRecastMeshSize = sizeof(mRecastMesh) + getSize(mRecastMesh);
-            + mRecastMesh.getVertices().size() * sizeof(float)
+        const std::size_t mRecastMeshWithWaterSize = mRecastMeshSize + sizeof(RecastMesh::Water);
-            + mRecastMesh.getAreaTypes().size() * sizeof(AreaType)
+        const std::size_t mPreparedNavMeshDataSize = sizeof(*mPreparedNavMeshData) + getSize(*mPreparedNavMeshData);
-            + mRecastMesh.getWater().size() * sizeof(RecastMesh::Water)
-            + mOffMeshConnections.size() * sizeof(OffMeshConnection);
-
-        const size_t cRecastMeshWithWaterKeySize = cRecastMeshKeySize + sizeof(RecastMesh::Water);
     };
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, get_for_empty_cache_should_return_empty_value)
@@ -50,7 +151,7 @@ namespace
         const std::size_t maxSize = 0;
         NavMeshTilesCache cache(maxSize);
 
-        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_for_not_enought_cache_size_should_return_empty_value)
@@ -58,51 +159,46 @@ namespace
         const std::size_t maxSize = 0;
         NavMeshTilesCache cache(maxSize);
 
-        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections,
+        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData)));
-                               std::move(mNavMeshData)));
+        EXPECT_NE(mPreparedNavMeshData, nullptr);
-        EXPECT_NE(mNavMeshData.mValue, nullptr);
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_return_cached_value)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = mRecastMeshSize + mPreparedNavMeshDataSize;
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = navMeshDataSize + navMeshKeySize;
         NavMeshTilesCache cache(maxSize);
+        const auto copy = clone(*mPreparedNavMeshData);
+        ASSERT_EQ(*mPreparedNavMeshData, *copy);
 
-        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections,
+        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-                                      std::move(mNavMeshData));
         ASSERT_TRUE(result);
-        EXPECT_EQ(result.get(), (NavMeshDataRef {mData, 1}));
+        EXPECT_EQ(result.get(), *copy);
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_existing_element_should_return_cached_element)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = 2 * (mRecastMeshSize + mPreparedNavMeshDataSize);
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = 2 * (navMeshDataSize + navMeshKeySize);
         NavMeshTilesCache cache(maxSize);
-        const auto anotherData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto copy = clone(*mPreparedNavMeshData);
-        NavMeshData anotherNavMeshData {anotherData, 1};
+        const auto sameCopy = clone(*mPreparedNavMeshData);
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        EXPECT_EQ(mNavMeshData.mValue, nullptr);
+        EXPECT_EQ(mPreparedNavMeshData, nullptr);
-        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(anotherNavMeshData));
+        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(copy));
         ASSERT_TRUE(result);
-        EXPECT_EQ(result.get(), (NavMeshDataRef {mData, 1}));
+        EXPECT_EQ(result.get(), *sameCopy);
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, get_should_return_cached_value)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = mRecastMeshSize + mPreparedNavMeshDataSize;
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = navMeshDataSize + navMeshKeySize;
         NavMeshTilesCache cache(maxSize);
+        const auto copy = clone(*mPreparedNavMeshData);
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        const auto result = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections);
+        const auto result = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh);
         ASSERT_TRUE(result);
-        EXPECT_EQ(result.get(), (NavMeshDataRef {mData, 1}));
+        EXPECT_EQ(result.get(), *copy);
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, get_for_cache_miss_by_agent_half_extents_should_return_empty_value)
@@ -111,8 +207,8 @@ namespace
         NavMeshTilesCache cache(maxSize);
         const osg::Vec3f unexsistentAgentHalfExtents {1, 1, 1};
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        EXPECT_FALSE(cache.get(unexsistentAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(unexsistentAgentHalfExtents, mTilePosition, mRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, get_for_cache_miss_by_tile_position_should_return_empty_value)
@@ -121,8 +217,8 @@ namespace
         NavMeshTilesCache cache(maxSize);
         const TilePosition unexistentTilePosition {1, 1};
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        EXPECT_FALSE(cache.get(mAgentHalfExtents, unexistentTilePosition, mRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(mAgentHalfExtents, unexistentTilePosition, mRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, get_for_cache_miss_by_recast_mesh_should_return_empty_value)
@@ -132,217 +228,189 @@ namespace
         const std::vector<RecastMesh::Water> water {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh unexistentRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, water};
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, unexistentRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, unexistentRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_replace_unused_value)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = mRecastMeshWithWaterSize + mPreparedNavMeshDataSize;
-        const std::size_t navMeshKeySize = cRecastMeshWithWaterKeySize;
-        const std::size_t maxSize = navMeshDataSize + navMeshKeySize;
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> water {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh anotherRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, water};
-        const auto anotherData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto anotherPreparedNavMeshData = makePeparedNavMeshData(3);
-        NavMeshData anotherNavMeshData {anotherData, 1};
+        const auto copy = clone(*anotherPreparedNavMeshData);
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        const auto result = cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, mOffMeshConnections,
+        const auto result = cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh,
-                                      std::move(anotherNavMeshData));
+                                      std::move(anotherPreparedNavMeshData));
         ASSERT_TRUE(result);
-        EXPECT_EQ(result.get(), (NavMeshDataRef {anotherData, 1}));
+        EXPECT_EQ(result.get(), *copy);
-        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_not_replace_used_value)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = mRecastMeshWithWaterSize + mPreparedNavMeshDataSize;
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = navMeshDataSize + navMeshKeySize;
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> water {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh anotherRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, water};
-        const auto anotherData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto anotherPreparedNavMeshData = makePeparedNavMeshData(3);
-        NavMeshData anotherNavMeshData {anotherData, 1};
 
-        const auto value = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections,
+        const auto value = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh,
-                                     std::move(mNavMeshData));
+                                     std::move(mPreparedNavMeshData));
-        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, mOffMeshConnections,
+        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh,
-                               std::move(anotherNavMeshData)));
+                               std::move(anotherPreparedNavMeshData)));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_replace_unused_least_recently_set_value)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = 2 * (mRecastMeshWithWaterSize + mPreparedNavMeshDataSize);
-        const std::size_t navMeshKeySize = cRecastMeshWithWaterKeySize;
-        const std::size_t maxSize = 2 * (navMeshDataSize + navMeshKeySize);
         NavMeshTilesCache cache(maxSize);
+        const auto copy = clone(*mPreparedNavMeshData);
 
         const std::vector<RecastMesh::Water> leastRecentlySetWater {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh leastRecentlySetRecastMesh {mGeneration, mRevision, mIndices, mVertices,
             mAreaTypes, leastRecentlySetWater};
-        const auto leastRecentlySetData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto leastRecentlySetData = makePeparedNavMeshData(3);
-        NavMeshData leastRecentlySetNavMeshData {leastRecentlySetData, 1};
 
         const std::vector<RecastMesh::Water> mostRecentlySetWater {1, RecastMesh::Water {2, btTransform::getIdentity()}};
         const RecastMesh mostRecentlySetRecastMesh {mGeneration, mRevision, mIndices, mVertices,
             mAreaTypes, mostRecentlySetWater};
-        const auto mostRecentlySetData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto mostRecentlySetData = makePeparedNavMeshData(3);
-        NavMeshData mostRecentlySetNavMeshData {mostRecentlySetData, 1};
 
-        ASSERT_TRUE(cache.set(mAgentHalfExtents, mTilePosition, leastRecentlySetRecastMesh, mOffMeshConnections,
+        ASSERT_TRUE(cache.set(mAgentHalfExtents, mTilePosition, leastRecentlySetRecastMesh,
-                              std::move(leastRecentlySetNavMeshData)));
+                              std::move(leastRecentlySetData)));
-        ASSERT_TRUE(cache.set(mAgentHalfExtents, mTilePosition, mostRecentlySetRecastMesh, mOffMeshConnections,
+        ASSERT_TRUE(cache.set(mAgentHalfExtents, mTilePosition, mostRecentlySetRecastMesh,
-                              std::move(mostRecentlySetNavMeshData)));
+                              std::move(mostRecentlySetData)));
 
-        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections,
+        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh,
-                                      std::move(mNavMeshData));
+                                      std::move(mPreparedNavMeshData));
-        EXPECT_EQ(result.get(), (NavMeshDataRef {mData, 1}));
+        EXPECT_EQ(result.get(), *copy);
 
-        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, leastRecentlySetRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, leastRecentlySetRecastMesh));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mostRecentlySetRecastMesh, mOffMeshConnections));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mostRecentlySetRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_replace_unused_least_recently_used_value)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = 2 * (mRecastMeshWithWaterSize + mPreparedNavMeshDataSize);
-        const std::size_t navMeshKeySize = cRecastMeshWithWaterKeySize;
-        const std::size_t maxSize = 2 * (navMeshDataSize + navMeshKeySize);
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> leastRecentlyUsedWater {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh leastRecentlyUsedRecastMesh {mGeneration, mRevision, mIndices, mVertices,
             mAreaTypes, leastRecentlyUsedWater};
-        const auto leastRecentlyUsedData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto leastRecentlyUsedData = makePeparedNavMeshData(3);
-        NavMeshData leastRecentlyUsedNavMeshData {leastRecentlyUsedData, 1};
+        const auto leastRecentlyUsedCopy = clone(*leastRecentlyUsedData);
 
         const std::vector<RecastMesh::Water> mostRecentlyUsedWater {1, RecastMesh::Water {2, btTransform::getIdentity()}};
         const RecastMesh mostRecentlyUsedRecastMesh {mGeneration, mRevision, mIndices, mVertices,
             mAreaTypes, mostRecentlyUsedWater};
-        const auto mostRecentlyUsedData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto mostRecentlyUsedData = makePeparedNavMeshData(3);
-        NavMeshData mostRecentlyUsedNavMeshData {mostRecentlyUsedData, 1};
+        const auto mostRecentlyUsedCopy = clone(*mostRecentlyUsedData);
 
-        cache.set(mAgentHalfExtents, mTilePosition, leastRecentlyUsedRecastMesh, mOffMeshConnections,
+        cache.set(mAgentHalfExtents, mTilePosition, leastRecentlyUsedRecastMesh, std::move(leastRecentlyUsedData));
-                  std::move(leastRecentlyUsedNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mostRecentlyUsedRecastMesh, std::move(mostRecentlyUsedData));
-        cache.set(mAgentHalfExtents, mTilePosition, mostRecentlyUsedRecastMesh, mOffMeshConnections,
-                  std::move(mostRecentlyUsedNavMeshData));
 
         {
-            const auto value = cache.get(mAgentHalfExtents, mTilePosition, leastRecentlyUsedRecastMesh, mOffMeshConnections);
+            const auto value = cache.get(mAgentHalfExtents, mTilePosition, leastRecentlyUsedRecastMesh);
             ASSERT_TRUE(value);
-            ASSERT_EQ(value.get(), (NavMeshDataRef {leastRecentlyUsedData, 1}));
+            ASSERT_EQ(value.get(), *leastRecentlyUsedCopy);
         }
 
         {
-            const auto value = cache.get(mAgentHalfExtents, mTilePosition, mostRecentlyUsedRecastMesh, mOffMeshConnections);
+            const auto value = cache.get(mAgentHalfExtents, mTilePosition, mostRecentlyUsedRecastMesh);
             ASSERT_TRUE(value);
-            ASSERT_EQ(value.get(), (NavMeshDataRef {mostRecentlyUsedData, 1}));
+            ASSERT_EQ(value.get(), *mostRecentlyUsedCopy);
         }
 
-        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections,
+        const auto copy = clone(*mPreparedNavMeshData);
-                                      std::move(mNavMeshData));
+        const auto result = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh,
-        EXPECT_EQ(result.get(), (NavMeshDataRef {mData, 1}));
+                                      std::move(mPreparedNavMeshData));
+        EXPECT_EQ(result.get(), *copy);
 
-        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, leastRecentlyUsedRecastMesh, mOffMeshConnections));
+        EXPECT_FALSE(cache.get(mAgentHalfExtents, mTilePosition, leastRecentlyUsedRecastMesh));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mostRecentlyUsedRecastMesh, mOffMeshConnections));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mostRecentlyUsedRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_not_replace_unused_least_recently_used_value_when_item_does_not_not_fit_cache_max_size)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = 2 * (mRecastMeshWithWaterSize + mPreparedNavMeshDataSize);
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = 2 * (navMeshDataSize + navMeshKeySize);
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> water {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh tooLargeRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, water};
-        const auto tooLargeData = reinterpret_cast<unsigned char*>(dtAlloc(2, DT_ALLOC_PERM));
+        auto tooLargeData = makePeparedNavMeshData(10);
-        NavMeshData tooLargeNavMeshData {tooLargeData, 2};
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, tooLargeRecastMesh, mOffMeshConnections,
+        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, tooLargeRecastMesh, std::move(tooLargeData)));
-                               std::move(tooLargeNavMeshData)));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, set_should_not_replace_unused_least_recently_used_value_when_item_does_not_not_fit_size_of_unused_items)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = 2 * (mRecastMeshWithWaterSize + mPreparedNavMeshDataSize);
-        const std::size_t navMeshKeySize1 = cRecastMeshKeySize;
-        const std::size_t navMeshKeySize2 = cRecastMeshWithWaterKeySize;
-        const std::size_t maxSize = 2 * navMeshDataSize + navMeshKeySize1 + navMeshKeySize2;
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> anotherWater {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh anotherRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, anotherWater};
-        const auto anotherData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto anotherData = makePeparedNavMeshData(3);
-        NavMeshData anotherNavMeshData {anotherData, 1};
 
         const std::vector<RecastMesh::Water> tooLargeWater {1, RecastMesh::Water {2, btTransform::getIdentity()}};
         const RecastMesh tooLargeRecastMesh {mGeneration, mRevision, mIndices, mVertices,
             mAreaTypes, tooLargeWater};
-        const auto tooLargeData = reinterpret_cast<unsigned char*>(dtAlloc(2, DT_ALLOC_PERM));
+        auto tooLargeData = makePeparedNavMeshData(10);
-        NavMeshData tooLargeNavMeshData {tooLargeData, 2};
 
-        const auto value = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections,
+        const auto value = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh,
-                                     std::move(mNavMeshData));
+                                     std::move(mPreparedNavMeshData));
         ASSERT_TRUE(value);
-        ASSERT_TRUE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, mOffMeshConnections,
+        ASSERT_TRUE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh,
-                              std::move(anotherNavMeshData)));
+                              std::move(anotherData)));
-        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, tooLargeRecastMesh, mOffMeshConnections,
+        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, tooLargeRecastMesh,
-                               std::move(tooLargeNavMeshData)));
+                               std::move(tooLargeData)));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, anotherRecastMesh, mOffMeshConnections));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, anotherRecastMesh));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, release_used_after_set_then_used_by_get_item_should_left_this_item_available)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = mRecastMeshWithWaterSize + mPreparedNavMeshDataSize;
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = navMeshDataSize + navMeshKeySize;
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> water {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh anotherRecastMesh {mGeneration, mRevision, mIndices, mVertices,
             mAreaTypes, water};
-        const auto anotherData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto anotherData = makePeparedNavMeshData(3);
-        NavMeshData anotherNavMeshData {anotherData, 1};
 
-        const auto firstCopy = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        const auto firstCopy = cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
         ASSERT_TRUE(firstCopy);
         {
-            const auto secondCopy = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections);
+            const auto secondCopy = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh);
             ASSERT_TRUE(secondCopy);
         }
-        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, mOffMeshConnections,
+        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, std::move(anotherData)));
-                               std::move(anotherNavMeshData)));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
     }
 
     TEST_F(DetourNavigatorNavMeshTilesCacheTest, release_twice_used_item_should_left_this_item_available)
     {
-        const std::size_t navMeshDataSize = 1;
+        const std::size_t maxSize = mRecastMeshWithWaterSize + mPreparedNavMeshDataSize;
-        const std::size_t navMeshKeySize = cRecastMeshKeySize;
-        const std::size_t maxSize = navMeshDataSize + navMeshKeySize;
         NavMeshTilesCache cache(maxSize);
 
         const std::vector<RecastMesh::Water> water {1, RecastMesh::Water {1, btTransform::getIdentity()}};
         const RecastMesh anotherRecastMesh {mGeneration, mRevision, mIndices, mVertices, mAreaTypes, water};
-        const auto anotherData = reinterpret_cast<unsigned char*>(dtAlloc(1, DT_ALLOC_PERM));
+        auto anotherData = makePeparedNavMeshData(3);
-        NavMeshData anotherNavMeshData {anotherData, 1};
 
-        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections, std::move(mNavMeshData));
+        cache.set(mAgentHalfExtents, mTilePosition, mRecastMesh, std::move(mPreparedNavMeshData));
-        const auto firstCopy = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections);
+        const auto firstCopy = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh);
         ASSERT_TRUE(firstCopy);
         {
-            const auto secondCopy = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections);
+            const auto secondCopy = cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh);
             ASSERT_TRUE(secondCopy);
         }
-        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, mOffMeshConnections,
+        EXPECT_FALSE(cache.set(mAgentHalfExtents, mTilePosition, anotherRecastMesh, std::move(anotherData)));
-                               std::move(anotherNavMeshData)));
+        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh));
-        EXPECT_TRUE(cache.get(mAgentHalfExtents, mTilePosition, mRecastMesh, mOffMeshConnections));
     }
 }

components/CMakeLists.txt

@@ -193,6 +193,8 @@ add_component_dir(detournavigator
     navmeshtileview
     oscillatingrecastmeshobject
     offmeshconnectionsmanager
+    preparednavmeshdata
+    navmeshcacheitem
     )
 
 set (ESM_UI ${CMAKE_SOURCE_DIR}/files/ui/contentselector.ui

components/detournavigator/makenavmesh.cpp

@@ -7,6 +7,8 @@
 #include "sharednavmesh.hpp"
 #include "flags.hpp"
 #include "navmeshtilescache.hpp"
+#include "preparednavmeshdata.hpp"
+#include "navmeshdata.hpp"
 
 #include <components/misc/convert.hpp>
 
@@ -26,25 +28,6 @@ namespace
 {
     using namespace DetourNavigator;
 
-    void initPolyMeshDetail(rcPolyMeshDetail& value)
-    {
-        value.meshes = nullptr;
-        value.verts = nullptr;
-        value.tris = nullptr;
-    }
-
-    struct PolyMeshDetailStackDeleter
-    {
-        void operator ()(rcPolyMeshDetail* value) const
-        {
-            rcFree(value->meshes);
-            rcFree(value->verts);
-            rcFree(value->tris);
-        }
-    };
-
-    using PolyMeshDetailStackPtr = std::unique_ptr<rcPolyMeshDetail, PolyMeshDetailStackDeleter>;
-
     struct WaterBounds
     {
         osg::Vec3f mMin;
@@ -363,10 +346,25 @@ namespace
         return true;
     }
 
-    NavMeshData makeNavMeshTileData(const osg::Vec3f& agentHalfExtents, const RecastMesh& recastMesh,
+    template <class T>
-        const std::vector<OffMeshConnection>& offMeshConnections, const TilePosition& tile,
+    unsigned long getMinValuableBitsNumber(const T value)
-        const osg::Vec3f& boundsMin, const osg::Vec3f& boundsMax, const Settings& settings)
     {
+        unsigned long power = 0;
+        while (power < sizeof(T) * 8 && (static_cast<T>(1) << power) < value)
+            ++power;
+        return power;
+    }
+}
+
+namespace DetourNavigator
+{
+    std::unique_ptr<PreparedNavMeshData> prepareNavMeshTileData(const RecastMesh& recastMesh,
+        const TilePosition& tile, const Bounds& bounds, const osg::Vec3f& agentHalfExtents, const Settings& settings)
+    {
+        const TileBounds tileBounds = makeTileBounds(settings, tile);
+        const osg::Vec3f boundsMin(tileBounds.mMin.x(), bounds.mMin.y() - 1, tileBounds.mMin.y());
+        const osg::Vec3f boundsMax(tileBounds.mMax.x(), bounds.mMax.y() + 1, tileBounds.mMax.y());
+
         rcContext context;
         const auto config = makeConfig(agentHalfExtents, boundsMin, boundsMax, settings);
 
@@ -374,19 +372,27 @@ namespace
         createHeightfield(context, solid, config.width, config.height, config.bmin, config.bmax, config.cs, config.ch);
 
         if (!rasterizeTriangles(context, agentHalfExtents, recastMesh, config, settings, solid))
-            return NavMeshData();
+            return nullptr;
 
         rcFilterLowHangingWalkableObstacles(&context, config.walkableClimb, solid);
         rcFilterLedgeSpans(&context, config.walkableHeight, config.walkableClimb, solid);
         rcFilterWalkableLowHeightSpans(&context, config.walkableHeight, solid);
 
-        rcPolyMesh polyMesh;
+        std::unique_ptr<PreparedNavMeshData> result = std::make_unique<PreparedNavMeshData>();
-        rcPolyMeshDetail polyMeshDetail;
-        initPolyMeshDetail(polyMeshDetail);
-        const PolyMeshDetailStackPtr polyMeshDetailPtr(&polyMeshDetail);
-        if (!fillPolyMesh(context, config, solid, polyMesh, polyMeshDetail))
-            return NavMeshData();
 
+        if (!fillPolyMesh(context, config, solid, result->mPolyMesh, result->mPolyMeshDetail))
+            return nullptr;
+
+        result->mCellSize = config.cs;
+        result->mCellHeight = config.ch;
+
+        return result;
+    }
+
+    NavMeshData makeNavMeshTileData(const PreparedNavMeshData& data,
+        const std::vector<OffMeshConnection>& offMeshConnections, const osg::Vec3f& agentHalfExtents,
+        const TilePosition& tile, const Settings& settings)
+    {
         const auto offMeshConVerts = getOffMeshVerts(offMeshConnections);
         const std::vector<float> offMeshConRad(offMeshConnections.size(), getRadius(settings, agentHalfExtents));
         const std::vector<unsigned char> offMeshConDir(offMeshConnections.size(), 0);
@@ -394,18 +400,18 @@ namespace
         const std::vector<unsigned short> offMeshConFlags = getOffMeshFlags(offMeshConnections);
 
         dtNavMeshCreateParams params;
-        params.verts = polyMesh.verts;
+        params.verts = data.mPolyMesh.verts;
-        params.vertCount = polyMesh.nverts;
+        params.vertCount = data.mPolyMesh.nverts;
-        params.polys = polyMesh.polys;
+        params.polys = data.mPolyMesh.polys;
-        params.polyAreas = polyMesh.areas;
+        params.polyAreas = data.mPolyMesh.areas;
-        params.polyFlags = polyMesh.flags;
+        params.polyFlags = data.mPolyMesh.flags;
-        params.polyCount = polyMesh.npolys;
+        params.polyCount = data.mPolyMesh.npolys;
-        params.nvp = polyMesh.nvp;
+        params.nvp = data.mPolyMesh.nvp;
-        params.detailMeshes = polyMeshDetail.meshes;
+        params.detailMeshes = data.mPolyMeshDetail.meshes;
-        params.detailVerts = polyMeshDetail.verts;
+        params.detailVerts = data.mPolyMeshDetail.verts;
-        params.detailVertsCount = polyMeshDetail.nverts;
+        params.detailVertsCount = data.mPolyMeshDetail.nverts;
-        params.detailTris = polyMeshDetail.tris;
+        params.detailTris = data.mPolyMeshDetail.tris;
-        params.detailTriCount = polyMeshDetail.ntris;
+        params.detailTriCount = data.mPolyMeshDetail.ntris;
         params.offMeshConVerts = offMeshConVerts.data();
         params.offMeshConRad = offMeshConRad.data();
         params.offMeshConDir = offMeshConDir.data();
@@ -416,12 +422,12 @@ namespace
         params.walkableHeight = getHeight(settings, agentHalfExtents);
         params.walkableRadius = getRadius(settings, agentHalfExtents);
         params.walkableClimb = getMaxClimb(settings);
-        rcVcopy(params.bmin, polyMesh.bmin);
+        rcVcopy(params.bmin, data.mPolyMesh.bmin);
-        rcVcopy(params.bmax, polyMesh.bmax);
+        rcVcopy(params.bmax, data.mPolyMesh.bmax);
-        params.cs = config.cs;
+        params.cs = data.mCellSize;
-        params.ch = config.ch;
+        params.ch = data.mCellHeight;
         params.buildBvTree = true;
-        params.userId = 0;
+        params.userId = data.mUserId;
         params.tileX = tile.x();
         params.tileY = tile.y();
         params.tileLayer = 0;
@@ -436,20 +442,6 @@ namespace
         return NavMeshData(navMeshData, navMeshDataSize);
     }
 
-
-
-    template <class T>
-    unsigned long getMinValuableBitsNumber(const T value)
-    {
-        unsigned long power = 0;
-        while (power < sizeof(T) * 8 && (static_cast<T>(1) << power) < value)
-            ++power;
-        return power;
-    }
-}
-
-namespace DetourNavigator
-{
     NavMeshPtr makeEmptyNavMesh(const Settings& settings)
     {
         // Max tiles and max polys affect how the tile IDs are caculated.
@@ -522,35 +514,32 @@ namespace DetourNavigator
             return navMeshCacheItem->lock()->removeTile(changedTile);
         }
 
-        auto cachedNavMeshData = navMeshTilesCache.get(agentHalfExtents, changedTile, *recastMesh, offMeshConnections);
+        auto cachedNavMeshData = navMeshTilesCache.get(agentHalfExtents, changedTile, *recastMesh);
         bool cached = static_cast<bool>(cachedNavMeshData);
 
         if (!cachedNavMeshData)
         {
-            const auto tileBounds = makeTileBounds(settings, changedTile);
+            auto prepared = prepareNavMeshTileData(*recastMesh, changedTile, recastMeshBounds,
-            const osg::Vec3f tileBorderMin(tileBounds.mMin.x(), recastMeshBounds.mMin.y() - 1, tileBounds.mMin.y());
+                                                   agentHalfExtents, settings);
-            const osg::Vec3f tileBorderMax(tileBounds.mMax.x(), recastMeshBounds.mMax.y() + 1, tileBounds.mMax.y());
 
-            auto navMeshData = makeNavMeshTileData(agentHalfExtents, *recastMesh, offMeshConnections, changedTile,
+            if (prepared == nullptr)
-                tileBorderMin, tileBorderMax, settings);
-
-            if (!navMeshData.mValue)
             {
                 Log(Debug::Debug) << "Ignore add tile: NavMeshData is null";
                 return navMeshCacheItem->lock()->removeTile(changedTile);
             }
 
-            cachedNavMeshData = navMeshTilesCache.set(agentHalfExtents, changedTile, *recastMesh,
+            cachedNavMeshData = navMeshTilesCache.set(agentHalfExtents, changedTile, *recastMesh, std::move(prepared));
-                                                      offMeshConnections, std::move(navMeshData));
 
             if (!cachedNavMeshData)
             {
                 Log(Debug::Debug) << "Navigator cache overflow";
-                return navMeshCacheItem->lock()->updateTile(changedTile, std::move(navMeshData));
+                return navMeshCacheItem->lock()->updateTile(changedTile, NavMeshTilesCache::Value(),
+                    makeNavMeshTileData(*prepared, offMeshConnections, agentHalfExtents, changedTile, settings));
             }
         }
 
-        const auto updateStatus = navMeshCacheItem->lock()->updateTile(changedTile, std::move(cachedNavMeshData));
+        const auto updateStatus = navMeshCacheItem->lock()->updateTile(changedTile, std::move(cachedNavMeshData),
+            makeNavMeshTileData(cachedNavMeshData.get(), offMeshConnections, agentHalfExtents, changedTile, settings));
 
         return UpdateNavMeshStatusBuilder(updateStatus).cached(cached).getResult();
     }

components/detournavigator/makenavmesh.hpp

@@ -6,10 +6,12 @@
 #include "tileposition.hpp"
 #include "sharednavmesh.hpp"
 #include "navmeshtilescache.hpp"
+#include "offmeshconnection.hpp"
 
 #include <osg/Vec3f>
 
 #include <memory>
+#include <vector>
 
 class dtNavMesh;
 
@@ -17,6 +19,8 @@ namespace DetourNavigator
 {
     class RecastMesh;
     struct Settings;
+    struct PreparedNavMeshData;
+    struct NavMeshData;
 
     inline float getLength(const osg::Vec2i& value)
     {
@@ -34,6 +38,13 @@ namespace DetourNavigator
         return expectedTilesCount <= maxTiles;
     }
 
+    std::unique_ptr<PreparedNavMeshData> prepareNavMeshTileData(const RecastMesh& recastMesh, const TilePosition& tile,
+        const Bounds& bounds, const osg::Vec3f& agentHalfExtents, const Settings& settings);
+
+    NavMeshData makeNavMeshTileData(const PreparedNavMeshData& data,
+        const std::vector<OffMeshConnection>& offMeshConnections, const osg::Vec3f& agentHalfExtents,
+        const TilePosition& tile, const Settings& settings);
+
     NavMeshPtr makeEmptyNavMesh(const Settings& settings);
 
     UpdateNavMeshStatus updateNavMesh(const osg::Vec3f& agentHalfExtents, const RecastMesh* recastMesh,

components/detournavigator/navmeshcacheitem.cpp

@@ -0,0 +1,82 @@
+#include "tileposition.hpp"
+#include "navmeshtilescache.hpp"
+#include "dtstatus.hpp"
+#include "navmeshtileview.hpp"
+#include "navmeshcacheitem.hpp"
+#include "navmeshdata.hpp"
+
+#include <components/misc/guarded.hpp>
+
+#include <DetourNavMesh.h>
+
+namespace
+{
+    using DetourNavigator::TilePosition;
+
+    const dtMeshTile* getTile(const dtNavMesh& navMesh, const TilePosition& position)
+    {
+        const int layer = 0;
+        return navMesh.getTileAt(position.x(), position.y(), layer);
+    }
+
+    bool removeTile(dtNavMesh& navMesh, const TilePosition& position)
+    {
+        const int layer = 0;
+        const auto tileRef = navMesh.getTileRefAt(position.x(), position.y(), layer);
+        if (tileRef == 0)
+            return false;
+        unsigned char** const data = nullptr;
+        int* const dataSize = nullptr;
+        return dtStatusSucceed(navMesh.removeTile(tileRef, data, dataSize));
+    }
+
+    dtStatus addTile(dtNavMesh& navMesh, unsigned char* data, int size)
+    {
+        const int doNotTransferOwnership = 0;
+        const dtTileRef lastRef = 0;
+        dtTileRef* const result = nullptr;
+        return navMesh.addTile(data, size, doNotTransferOwnership, lastRef, result);
+    }
+}
+
+namespace DetourNavigator
+{
+    UpdateNavMeshStatus NavMeshCacheItem::updateTile(const TilePosition& position, NavMeshTilesCache::Value&& cached,
+        NavMeshData&& navMeshData)
+    {
+        const dtMeshTile* currentTile = ::getTile(*mImpl, position);
+        if (currentTile != nullptr
+            && asNavMeshTileConstView(*currentTile) == asNavMeshTileConstView(navMeshData.mValue.get()))
+        {
+            return UpdateNavMeshStatus::ignored;
+        }
+        const auto removed = ::removeTile(*mImpl, position);
+        const auto addStatus = addTile(*mImpl, navMeshData.mValue.get(), navMeshData.mSize);
+        if (dtStatusSucceed(addStatus))
+        {
+            mUsedTiles[position] = std::make_pair(std::move(cached), std::move(navMeshData));
+            ++mNavMeshRevision;
+            return UpdateNavMeshStatusBuilder().added(true).removed(removed).getResult();
+        }
+        else
+        {
+            if (removed)
+            {
+                mUsedTiles.erase(position);
+                ++mNavMeshRevision;
+            }
+            return UpdateNavMeshStatusBuilder().removed(removed).failed((addStatus & DT_OUT_OF_MEMORY) != 0).getResult();
+        }
+    }
+
+    UpdateNavMeshStatus NavMeshCacheItem::removeTile(const TilePosition& position)
+    {
+        const auto removed = ::removeTile(*mImpl, position);
+        if (removed)
+        {
+            mUsedTiles.erase(position);
+            ++mNavMeshRevision;
+        }
+        return UpdateNavMeshStatusBuilder().removed(removed).getResult();
+    }
+}

components/detournavigator/navmeshcacheitem.hpp

@@ -5,14 +5,14 @@
 #include "tileposition.hpp"
 #include "navmeshtilescache.hpp"
 #include "dtstatus.hpp"
-#include "navmeshtileview.hpp"
+#include "navmeshdata.hpp"
 
 #include <components/misc/guarded.hpp>
 
-#include <DetourNavMesh.h>
-
 #include <map>
 
+struct dtMeshTile;
+
 namespace DetourNavigator
 {
     enum class UpdateNavMeshStatus : unsigned
@@ -96,26 +96,6 @@ namespace DetourNavigator
         }
     };
 
-    inline unsigned char* getRawData(NavMeshData& navMeshData)
-    {
-        return navMeshData.mValue.get();
-    }
-
-    inline unsigned char* getRawData(NavMeshTilesCache::Value& cachedNavMeshData)
-    {
-        return cachedNavMeshData.get().mValue;
-    }
-
-    inline int getSize(const NavMeshData& navMeshData)
-    {
-        return navMeshData.mSize;
-    }
-
-    inline int getSize(const NavMeshTilesCache::Value& cachedNavMeshData)
-    {
-        return cachedNavMeshData.get().mSize;
-    }
-
     class NavMeshCacheItem
     {
     public:
@@ -139,86 +119,16 @@ namespace DetourNavigator
             return mNavMeshRevision;
         }
 
-        template <class T>
+        UpdateNavMeshStatus updateTile(const TilePosition& position, NavMeshTilesCache::Value&& cached,
-        UpdateNavMeshStatus updateTile(const TilePosition& position, T&& navMeshData)
+                                       NavMeshData&& navMeshData);
-        {
-            const dtMeshTile* currentTile = getTile(position);
-            if (currentTile != nullptr
-                && asNavMeshTileConstView(*currentTile) == asNavMeshTileConstView(getRawData(navMeshData)))
-            {
-                return UpdateNavMeshStatus::ignored;
-            }
-            const auto removed = removeTileImpl(position);
-            const auto addStatus = addTileImpl(getRawData(navMeshData), getSize(navMeshData));
-            if (dtStatusSucceed(addStatus))
-            {
-                setUsedTile(position, std::forward<T>(navMeshData));
-                return UpdateNavMeshStatusBuilder().added(true).removed(removed).getResult();
-            }
-            else
-            {
-                if (removed)
-                    removeUsedTile(position);
-                return UpdateNavMeshStatusBuilder().removed(removed).failed((addStatus & DT_OUT_OF_MEMORY) != 0).getResult();
-            }
-        }
 
-        UpdateNavMeshStatus removeTile(const TilePosition& position)
+        UpdateNavMeshStatus removeTile(const TilePosition& position);
-        {
-            const auto removed = removeTileImpl(position);
-            if (removed)
-                removeUsedTile(position);
-            return UpdateNavMeshStatusBuilder().removed(removed).getResult();
-        }
 
     private:
         NavMeshPtr mImpl;
         std::size_t mGeneration;
         std::size_t mNavMeshRevision;
         std::map<TilePosition, std::pair<NavMeshTilesCache::Value, NavMeshData>> mUsedTiles;
-
-        void setUsedTile(const TilePosition& tilePosition, NavMeshTilesCache::Value value)
-        {
-            mUsedTiles[tilePosition] = std::make_pair(std::move(value), NavMeshData());
-            ++mNavMeshRevision;
-        }
-
-        void setUsedTile(const TilePosition& tilePosition, NavMeshData value)
-        {
-            mUsedTiles[tilePosition] = std::make_pair(NavMeshTilesCache::Value(), std::move(value));
-            ++mNavMeshRevision;
-        }
-
-        void removeUsedTile(const TilePosition& tilePosition)
-        {
-            mUsedTiles.erase(tilePosition);
-            ++mNavMeshRevision;
-        }
-
-        dtStatus addTileImpl(unsigned char* data, int size)
-        {
-            const int doNotTransferOwnership = 0;
-            const dtTileRef lastRef = 0;
-            dtTileRef* const result = nullptr;
-            return mImpl->addTile(data, size, doNotTransferOwnership, lastRef, result);
-        }
-
-        bool removeTileImpl(const TilePosition& position)
-        {
-            const int layer = 0;
-            const auto tileRef = mImpl->getTileRefAt(position.x(), position.y(), layer);
-            if (tileRef == 0)
-                return false;
-            unsigned char** const data = nullptr;
-            int* const dataSize = nullptr;
-            return dtStatusSucceed(mImpl->removeTile(tileRef, data, dataSize));
-        }
-
-        const dtMeshTile* getTile(const TilePosition& position) const
-        {
-            const int layer = 0;
-            return mImpl->getTileAt(position.x(), position.y(), layer);
-        }
     };
 
     using GuardedNavMeshCacheItem = Misc::ScopeGuarded<NavMeshCacheItem>;

components/detournavigator/navmeshdata.hpp

@@ -3,7 +3,6 @@
 
 #include <DetourAlloc.h>
 
-#include <algorithm>
 #include <memory>
 
 namespace DetourNavigator

components/detournavigator/navmeshtilescache.cpp

@@ -6,32 +6,18 @@
 
 namespace DetourNavigator
 {
-    namespace
-    {
-        inline std::size_t getSize(const RecastMesh& recastMesh,
-                                   const std::vector<OffMeshConnection>& offMeshConnections)
-        {
-            const std::size_t indicesSize = recastMesh.getIndices().size() * sizeof(int);
-            const std::size_t verticesSize = recastMesh.getVertices().size() * sizeof(float);
-            const std::size_t areaTypesSize = recastMesh.getAreaTypes().size() * sizeof(AreaType);
-            const std::size_t waterSize = recastMesh.getWater().size() * sizeof(RecastMesh::Water);
-            const std::size_t offMeshConnectionsSize = offMeshConnections.size() * sizeof(OffMeshConnection);
-            return indicesSize + verticesSize + areaTypesSize + waterSize + offMeshConnectionsSize;
-        }
-    }
-
     NavMeshTilesCache::NavMeshTilesCache(const std::size_t maxNavMeshDataSize)
         : mMaxNavMeshDataSize(maxNavMeshDataSize), mUsedNavMeshDataSize(0), mFreeNavMeshDataSize(0),
           mHitCount(0), mGetCount(0) {}
 
     NavMeshTilesCache::Value NavMeshTilesCache::get(const osg::Vec3f& agentHalfExtents, const TilePosition& changedTile,
-        const RecastMesh& recastMesh, const std::vector<OffMeshConnection>& offMeshConnections)
+        const RecastMesh& recastMesh)
     {
         const std::lock_guard<std::mutex> lock(mMutex);
 
         ++mGetCount;
 
-        const auto tile = mValues.find(std::make_tuple(agentHalfExtents, changedTile, NavMeshKeyView(recastMesh, offMeshConnections)));
+        const auto tile = mValues.find(std::make_tuple(agentHalfExtents, changedTile, recastMesh));
         if (tile == mValues.end())
             return Value();
 
@@ -43,10 +29,10 @@ namespace DetourNavigator
     }
 
     NavMeshTilesCache::Value NavMeshTilesCache::set(const osg::Vec3f& agentHalfExtents, const TilePosition& changedTile,
-        const RecastMesh& recastMesh, const std::vector<OffMeshConnection>& offMeshConnections,
+        const RecastMesh& recastMesh, std::unique_ptr<PreparedNavMeshData>&& value)
-        NavMeshData&& value)
     {
-        const auto itemSize = static_cast<std::size_t>(value.mSize) + getSize(recastMesh, offMeshConnections);
+        const auto itemSize = sizeof(RecastMesh) + getSize(recastMesh)
+            + (value == nullptr ? 0 : sizeof(PreparedNavMeshData) + getSize(*value));
 
         const std::lock_guard<std::mutex> lock(mMutex);
 
@@ -56,13 +42,10 @@ namespace DetourNavigator
         while (!mFreeItems.empty() && mUsedNavMeshDataSize + itemSize > mMaxNavMeshDataSize)
             removeLeastRecentlyUsed();
 
-        NavMeshKey navMeshKey {
+        RecastMeshData key {recastMesh.getIndices(), recastMesh.getVertices(), recastMesh.getAreaTypes(), recastMesh.getWater()};
-            RecastMeshData {recastMesh.getIndices(), recastMesh.getVertices(), recastMesh.getAreaTypes(), recastMesh.getWater()},
-            offMeshConnections
-        };
 
-        const auto iterator = mFreeItems.emplace(mFreeItems.end(), agentHalfExtents, changedTile, std::move(navMeshKey), itemSize);
+        const auto iterator = mFreeItems.emplace(mFreeItems.end(), agentHalfExtents, changedTile, std::move(key), itemSize);
-        const auto emplaced = mValues.emplace(std::make_tuple(agentHalfExtents, changedTile, NavMeshKeyRef(iterator->mNavMeshKey)), iterator);
+        const auto emplaced = mValues.emplace(std::make_tuple(agentHalfExtents, changedTile, std::cref(iterator->mRecastMeshData)), iterator);
 
         if (!emplaced.second)
         {
@@ -73,7 +56,7 @@ namespace DetourNavigator
             return Value(*this, emplaced.first->second);
         }
 
-        iterator->mNavMeshData = std::move(value);
+        iterator->mPreparedNavMeshData = std::move(value);
         ++iterator->mUseCount;
         mUsedNavMeshDataSize += itemSize;
         mBusyItems.splice(mBusyItems.end(), mFreeItems, iterator);
@@ -108,7 +91,7 @@ namespace DetourNavigator
     {
         const auto& item = mFreeItems.back();
 
-        const auto value = mValues.find(std::make_tuple(item.mAgentHalfExtents, item.mChangedTile, NavMeshKeyRef(item.mNavMeshKey)));
+        const auto value = mValues.find(std::make_tuple(item.mAgentHalfExtents, item.mChangedTile, std::cref(item.mRecastMeshData)));
         if (value == mValues.end())
             return;
 

components/detournavigator/navmeshtilescache.hpp

@@ -1,8 +1,7 @@
 #ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_NAVMESHTILESCACHE_H
 #define OPENMW_COMPONENTS_DETOURNAVIGATOR_NAVMESHTILESCACHE_H
 
-#include "offmeshconnection.hpp"
+#include "preparednavmeshdata.hpp"
-#include "navmeshdata.hpp"
 #include "recastmesh.hpp"
 #include "tileposition.hpp"
 
@@ -21,12 +20,6 @@ namespace osg
 
 namespace DetourNavigator
 {
-    struct NavMeshDataRef
-    {
-        unsigned char* mValue;
-        int mSize;
-    };
-
     struct RecastMeshData
     {
         std::vector<int> mIndices;
@@ -53,71 +46,6 @@ namespace DetourNavigator
                 < std::tie(rhs.mIndices, rhs.mVertices, rhs.mAreaTypes, rhs.mWater);
     }
 
-    struct NavMeshKey
-    {
-        RecastMeshData mRecastMesh;
-        std::vector<OffMeshConnection> mOffMeshConnections;
-    };
-
-    inline bool operator <(const NavMeshKey& lhs, const NavMeshKey& rhs)
-    {
-        return std::tie(lhs.mRecastMesh, lhs.mOffMeshConnections)
-                < std::tie(rhs.mRecastMesh, rhs.mOffMeshConnections);
-    }
-
-    struct NavMeshKeyRef
-    {
-        std::reference_wrapper<const NavMeshKey> mRef;
-
-        explicit NavMeshKeyRef(const NavMeshKey& ref) : mRef(ref) {}
-    };
-
-    inline bool operator <(const NavMeshKeyRef& lhs, const NavMeshKeyRef& rhs)
-    {
-        return lhs.mRef.get() < rhs.mRef.get();
-    }
-
-    struct NavMeshKeyView
-    {
-        std::reference_wrapper<const RecastMesh> mRecastMesh;
-        std::reference_wrapper<const std::vector<OffMeshConnection>> mOffMeshConnections;
-
-        NavMeshKeyView(const RecastMesh& recastMesh, const std::vector<OffMeshConnection>& offMeshConnections)
-            : mRecastMesh(recastMesh), mOffMeshConnections(offMeshConnections) {}
-    };
-
-    inline bool operator <(const NavMeshKeyView& lhs, const NavMeshKey& rhs)
-    {
-        return std::tie(lhs.mRecastMesh.get(), lhs.mOffMeshConnections.get())
-                < std::tie(rhs.mRecastMesh, rhs.mOffMeshConnections);
-    }
-
-    inline bool operator <(const NavMeshKey& lhs, const NavMeshKeyView& rhs)
-    {
-        return std::tie(lhs.mRecastMesh, lhs.mOffMeshConnections)
-                < std::tie(rhs.mRecastMesh.get(), rhs.mOffMeshConnections.get());
-    }
-
-    template <class R>
-    inline bool operator <(const NavMeshKeyRef& lhs, const R& rhs)
-    {
-        return lhs.mRef.get() < rhs;
-    }
-
-    template <class L>
-    inline bool operator <(const L& lhs, const NavMeshKeyRef& rhs)
-    {
-        return lhs < rhs.mRef.get();
-    }
-
-    template <class L, class R>
-    inline bool operator <(const std::tuple<osg::Vec3f, TilePosition, L>& lhs, const std::tuple<osg::Vec3f, TilePosition, R>& rhs)
-    {
-        const auto left = std::tie(std::get<0>(lhs), std::get<1>(lhs));
-        const auto right = std::tie(std::get<0>(rhs), std::get<1>(rhs));
-        return std::tie(left, std::get<2>(lhs)) < std::tie(right, std::get<2>(rhs));
-    }
-
     class NavMeshTilesCache
     {
     public:
@@ -126,15 +54,16 @@ namespace DetourNavigator
             std::atomic<std::int64_t> mUseCount;
             osg::Vec3f mAgentHalfExtents;
             TilePosition mChangedTile;
-            NavMeshKey mNavMeshKey;
+            RecastMeshData mRecastMeshData;
-            NavMeshData mNavMeshData;
+            std::unique_ptr<PreparedNavMeshData> mPreparedNavMeshData;
             std::size_t mSize;
 
-            Item(const osg::Vec3f& agentHalfExtents, const TilePosition& changedTile, NavMeshKey&& navMeshKey, std::size_t size)
+            Item(const osg::Vec3f& agentHalfExtents, const TilePosition& changedTile,
+                 RecastMeshData&& recastMeshData, std::size_t size)
                 : mUseCount(0)
                 , mAgentHalfExtents(agentHalfExtents)
                 , mChangedTile(changedTile)
-                , mNavMeshKey(navMeshKey)
+                , mRecastMeshData(std::move(recastMeshData))
                 , mSize(size)
             {}
         };
@@ -181,9 +110,9 @@ namespace DetourNavigator
                 return *this;
             }
 
-            NavMeshDataRef get() const
+            const PreparedNavMeshData& get() const
             {
-                return NavMeshDataRef {mIterator->mNavMeshData.mValue.get(), mIterator->mNavMeshData.mSize};
+                return *mIterator->mPreparedNavMeshData;
             }
 
             operator bool() const
@@ -208,11 +137,10 @@ namespace DetourNavigator
         NavMeshTilesCache(const std::size_t maxNavMeshDataSize);
 
         Value get(const osg::Vec3f& agentHalfExtents, const TilePosition& changedTile,
-            const RecastMesh& recastMesh, const std::vector<OffMeshConnection>& offMeshConnections);
+            const RecastMesh& recastMesh);
 
         Value set(const osg::Vec3f& agentHalfExtents, const TilePosition& changedTile,
-            const RecastMesh& recastMesh, const std::vector<OffMeshConnection>& offMeshConnections,
+            const RecastMesh& recastMesh, std::unique_ptr<PreparedNavMeshData>&& value);
-            NavMeshData&& value);
 
         Stats getStats() const;
 
@@ -227,7 +155,7 @@ namespace DetourNavigator
         std::size_t mGetCount;
         std::list<Item> mBusyItems;
         std::list<Item> mFreeItems;
-        std::map<std::tuple<osg::Vec3f, TilePosition, NavMeshKeyRef>, ItemIterator, std::less<>> mValues;
+        std::map<std::tuple<osg::Vec3f, TilePosition, std::reference_wrapper<const RecastMeshData>>, ItemIterator, std::less<>> mValues;
 
         void removeLeastRecentlyUsed();
 

components/detournavigator/navmeshtileview.cpp

@@ -1,4 +1,5 @@
 #include "navmeshtileview.hpp"
+#include "ref.hpp"
 
 #include <DetourCommon.h>
 #include <DetourNavMesh.h>
@@ -10,47 +11,9 @@
 
 namespace
 {
-    template <typename T>
+    using DetourNavigator::ArrayRef;
-    struct Ref
+    using DetourNavigator::Ref;
-    {
+    using DetourNavigator::Span;
-        T& mRef;
-
-        explicit Ref(T& ref) : mRef(ref) {}
-
-        friend bool operator==(const Ref& lhs, const Ref& rhs)
-        {
-            return lhs.mRef == rhs.mRef;
-        }
-    };
-
-    template <typename T, std::size_t size>
-    struct ArrayRef
-    {
-        T (&mRef)[size];
-
-        explicit ArrayRef(T (&ref)[size]) : mRef(ref) {}
-
-        friend bool operator==(const ArrayRef& lhs, const ArrayRef& rhs)
-        {
-            return std::equal(std::begin(lhs.mRef), std::end(lhs.mRef), std::begin(rhs.mRef));
-        }
-    };
-
-    template <typename T>
-    struct Span
-    {
-        T* mBegin;
-        T* mEnd;
-
-        explicit Span(T* data, int size) : mBegin(data), mEnd(data + static_cast<std::size_t>(size)) {}
-
-        friend bool operator==(const Span& lhs, const Span& rhs)
-        {
-            // size is already equal if headers are equal
-            assert((lhs.mEnd - lhs.mBegin) == (rhs.mEnd - rhs.mBegin));
-            return std::equal(lhs.mBegin, lhs.mEnd, rhs.mBegin);
-        }
-    };
 
     auto makeTuple(const dtMeshHeader& v)
     {

components/detournavigator/offmeshconnection.hpp

@@ -5,6 +5,7 @@
 
 #include <osg/Vec3f>
 
+#include <vector>
 #include <tuple>
 
 namespace DetourNavigator

components/detournavigator/preparednavmeshdata.cpp

@@ -0,0 +1,52 @@
+#include "preparednavmeshdata.hpp"
+#include "preparednavmeshdatatuple.hpp"
+
+#include <Recast.h>
+#include <RecastAlloc.h>
+
+namespace
+{
+    using namespace DetourNavigator;
+
+    void initPolyMeshDetail(rcPolyMeshDetail& value) noexcept
+    {
+        value.meshes = nullptr;
+        value.verts = nullptr;
+        value.tris = nullptr;
+        value.nmeshes = 0;
+        value.nverts = 0;
+        value.ntris = 0;
+    }
+
+    void freePolyMeshDetail(rcPolyMeshDetail& value) noexcept
+    {
+        rcFree(value.meshes);
+        rcFree(value.verts);
+        rcFree(value.tris);
+    }
+}
+
+template <class T>
+inline constexpr auto operator==(const T& lhs, const T& rhs) noexcept
+    -> std::enable_if_t<std::is_same_v<std::void_t<decltype(makeTuple(lhs))>, void>, bool>
+{
+    return makeTuple(lhs) == makeTuple(rhs);
+}
+
+namespace DetourNavigator
+{
+    PreparedNavMeshData::PreparedNavMeshData() noexcept
+    {
+        initPolyMeshDetail(mPolyMeshDetail);
+    }
+
+    PreparedNavMeshData::~PreparedNavMeshData() noexcept
+    {
+        freePolyMeshDetail(mPolyMeshDetail);
+    }
+
+    bool operator==(const PreparedNavMeshData& lhs, const PreparedNavMeshData& rhs) noexcept
+    {
+        return makeTuple(lhs) == makeTuple(rhs);
+    }
+}

components/detournavigator/preparednavmeshdata.hpp

@@ -0,0 +1,48 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_PREPAREDNAVMESHDATA_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_PREPAREDNAVMESHDATA_H
+
+#include <Recast.h>
+
+#include <cstddef>
+
+namespace DetourNavigator
+{
+    struct PreparedNavMeshData
+    {
+        unsigned int mUserId = 0;
+        float mCellSize = 0;
+        float mCellHeight = 0;
+        rcPolyMesh mPolyMesh;
+        rcPolyMeshDetail mPolyMeshDetail;
+
+        PreparedNavMeshData() noexcept;
+        PreparedNavMeshData(const PreparedNavMeshData&) = delete;
+
+        ~PreparedNavMeshData() noexcept;
+
+        friend bool operator==(const PreparedNavMeshData& lhs, const PreparedNavMeshData& rhs) noexcept;
+    };
+
+    inline constexpr std::size_t getSize(const rcPolyMesh& value) noexcept
+    {
+        return static_cast<std::size_t>(3 * value.nverts) * sizeof(*value.verts)
+            + static_cast<std::size_t>(value.maxpolys * 2 * value.nvp) * sizeof(*value.polys)
+            + static_cast<std::size_t>(value.maxpolys) * sizeof(*value.regs)
+            + static_cast<std::size_t>(value.maxpolys) * sizeof(*value.flags)
+            + static_cast<std::size_t>(value.maxpolys) * sizeof(*value.areas);
+    }
+
+    inline constexpr std::size_t getSize(const rcPolyMeshDetail& value) noexcept
+    {
+        return static_cast<std::size_t>(4 * value.nmeshes) * sizeof(*value.meshes)
+            + static_cast<std::size_t>(4 * value.ntris) * sizeof(*value.tris)
+            + static_cast<std::size_t>(3 * value.nverts) * sizeof(*value.verts);
+    }
+
+    inline constexpr std::size_t getSize(const PreparedNavMeshData& value) noexcept
+    {
+        return getSize(value.mPolyMesh) + getSize(value.mPolyMeshDetail);
+    }
+}
+
+#endif

components/detournavigator/preparednavmeshdatatuple.hpp

@@ -0,0 +1,51 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_PREPAREDNAVMESHDATATUPLE_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_PREPAREDNAVMESHDATATUPLE_H
+
+#include "preparednavmeshdata.hpp"
+#include "ref.hpp"
+
+#include <Recast.h>
+
+#include <tuple>
+
+namespace DetourNavigator
+{
+    constexpr auto makeTuple(const rcPolyMesh& v) noexcept
+    {
+        return std::tuple(
+            Span(v.verts, 3 * v.nverts),
+            Span(v.polys, v.maxpolys * 2 * v.nvp),
+            Span(v.regs, v.maxpolys),
+            Span(v.flags, v.maxpolys),
+            Span(v.areas, v.maxpolys),
+            ArrayRef(v.bmin),
+            ArrayRef(v.bmax),
+            v.cs,
+            v.ch,
+            v.borderSize,
+            v.maxEdgeError
+        );
+    }
+
+    constexpr auto makeTuple(const rcPolyMeshDetail& v) noexcept
+    {
+        return std::tuple(
+            Span(v.meshes, 4 * v.nmeshes),
+            Span(v.verts, 3 * v.nverts),
+            Span(v.tris, 4 * v.ntris)
+        );
+    }
+
+    constexpr auto makeTuple(const PreparedNavMeshData& v) noexcept
+    {
+        return std::tuple(
+            v.mUserId,
+            v.mCellHeight,
+            v.mCellSize,
+            Ref(v.mPolyMesh),
+            Ref(v.mPolyMeshDetail)
+        );
+    }
+}
+
+#endif

components/detournavigator/recastmesh.hpp

@@ -80,6 +80,15 @@ namespace DetourNavigator
         std::vector<AreaType> mAreaTypes;
         std::vector<Water> mWater;
         Bounds mBounds;
+
+        friend inline std::size_t getSize(const RecastMesh& recastMesh) noexcept
+        {
+            const std::size_t indicesSize = recastMesh.mIndices.size() * sizeof(int);
+            const std::size_t verticesSize = recastMesh.mVertices.size() * sizeof(float);
+            const std::size_t areaTypesSize = recastMesh.mAreaTypes.size() * sizeof(AreaType);
+            const std::size_t waterSize = recastMesh.mWater.size() * sizeof(RecastMesh::Water);
+            return indicesSize + verticesSize + areaTypesSize + waterSize;
+        }
     };
 
     inline bool operator<(const RecastMesh::Water& lhs, const RecastMesh::Water& rhs)

components/detournavigator/ref.hpp

@@ -0,0 +1,55 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_REF_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_REF_H
+
+#include <algorithm>
+#include <cassert>
+
+namespace DetourNavigator
+{
+    template <typename T>
+    struct Ref
+    {
+        T& mRef;
+
+        constexpr explicit Ref(T& ref) noexcept : mRef(ref) {}
+
+        friend bool operator==(const Ref& lhs, const Ref& rhs)
+        {
+            return lhs.mRef == rhs.mRef;
+        }
+    };
+
+    template <typename T, std::size_t size>
+    struct ArrayRef
+    {
+        T (&mRef)[size];
+
+        constexpr explicit ArrayRef(T (&ref)[size]) noexcept : mRef(ref) {}
+
+        friend bool operator==(const ArrayRef& lhs, const ArrayRef& rhs)
+        {
+            return std::equal(std::begin(lhs.mRef), std::end(lhs.mRef), std::begin(rhs.mRef));
+        }
+    };
+
+    template <typename T>
+    struct Span
+    {
+        T* mBegin;
+        T* mEnd;
+
+        constexpr explicit Span(T* data, int size) noexcept
+            : mBegin(data)
+            , mEnd(data + static_cast<std::size_t>(size))
+        {}
+
+        friend bool operator==(const Span& lhs, const Span& rhs)
+        {
+            // size is already equal if headers are equal
+            assert((lhs.mEnd - lhs.mBegin) == (rhs.mEnd - rhs.mBegin));
+            return std::equal(lhs.mBegin, lhs.mEnd, rhs.mBegin);
+        }
+    };
+}
+
+#endif