CMakeLists.txt

@@ -2,14 +2,6 @@ cmake_minimum_required(VERSION 3.22.0)
 
 set(PROJECT_NAME zecsy)
 
-if(NOT CMAKE_BUILD_TYPE)
-  set(CMAKE_BUILD_TYPE Release)
-endif()
-
-set(CMAKE_CXX_FLAGS "-Wall -Wextra")
-set(CMAKE_CXX_FLAGS_DEBUG "-g")
-set(CMAKE_CXX_FLAGS_RELEASE "-O3")
-
 project(${PROJECT_NAME})
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 

tests/zecsy.cpp

@@ -7,7 +7,7 @@
 
 using namespace zecsy;
 
-TEST_CASE("Create a single entity and verify its existence", "[test]")
+TEST_CASE("Create a single entity and verify its existence")
 {
     world w;
 
@@ -16,8 +16,7 @@ TEST_CASE("Create a single entity and verify its existence", "[test]")
     REQUIRE(w.is_alive(e));
 }
 
-TEST_CASE("Destroy an entity and ensure it no longer exists in the world",
+TEST_CASE("Destroy an entity and ensure it no longer exists in the world")
-          "[test]")
 {
     world w;
 
@@ -27,7 +26,7 @@ TEST_CASE("Destroy an entity and ensure it no longer exists in the world",
     REQUIRE_FALSE(w.is_alive(e));
 }
 
-TEST_CASE("Entity #0 should be reserved and never used", "[test]")
+TEST_CASE("Entity #0 should be reserved and never used")
 {
     world w;
 
@@ -41,8 +40,7 @@ struct ChoosenOne
 {
 };
 
-TEST_CASE("Entity shouldn't have a component that wasn't attached to it",
+TEST_CASE("Entity shouldn't have a component that wasn't attached to it")
-          "[test]")
 {
     world w;
 
@@ -51,7 +49,7 @@ TEST_CASE("Entity shouldn't have a component that wasn't attached to it",
     REQUIRE_FALSE(w.has<ChoosenOne>(e));
 }
 
-TEST_CASE("Attempt of getting non-owned component should throw", "[test]")
+TEST_CASE("Attempt of getting non-owned component should throw")
 {
     world w;
 
@@ -61,8 +59,7 @@ TEST_CASE("Attempt of getting non-owned component should throw", "[test]")
 }
 
 TEST_CASE("Attach a simple component to an entity and verify it is correctly "
-          "associated",
+          "associated")
-          "[test]")
 {
     world w;
 
@@ -83,8 +80,7 @@ struct Comp
 };
 
 TEST_CASE("Retrieve a component from an entity and verify its data matches "
-          "what was set",
+          "what was set")
-          "[test]")
 {
     world w;
 
@@ -99,8 +95,7 @@ TEST_CASE("Retrieve a component from an entity and verify its data matches "
 }
 
 TEST_CASE(
-    "Remove a component from an entity and verify it is no longer attached",
+    "Remove a component from an entity and verify it is no longer attached")
-    "[test]")
 {
     world w;
 
@@ -116,7 +111,7 @@ TEST_CASE(
     REQUIRE_FALSE(w.has<ChoosenOne>(e));
 }
 
-TEST_CASE("Addresses of removed components should be reused", "[test]")
+TEST_CASE("Addresses of removed components should be reused")
 {
     world w;
     std::vector<entity_id> entities;
@@ -161,8 +156,7 @@ TEST_CASE("Addresses of removed components should be reused", "[test]")
 }
 
 TEST_CASE("Attach multiple components to an entity and verify all are "
-          "correctly stored and retrievable",
+          "correctly stored and retrievable")
-          "[test]")
 {
     world w;
 
@@ -179,8 +173,7 @@ TEST_CASE("Attach multiple components to an entity and verify all are "
 }
 
 TEST_CASE("Create a simple system that processes entities with a specific "
-          "component and verify it executes correctly",
+          "component and verify it executes correctly")
-          "[test]")
 {
     struct Component
     {
@@ -207,8 +200,7 @@ TEST_CASE("Create a simple system that processes entities with a specific "
 }
 
 TEST_CASE("Test a systems ability to query and process only entities with a "
-          "specific combination of components",
+          "specific combination of components")
-          "[test]")
 {
     struct C0
     {
@@ -234,8 +226,7 @@ TEST_CASE("Test a systems ability to query and process only entities with a "
     REQUIRE(w.get<C0>(e0).value == 0);
     REQUIRE(w.get<C1>(e0).value == 10);
 
-    w.query<C0, C1>(
+    w.query<C0, C1>([e0](entity_id e, C0& c0, C1& c1)
-        [e0](entity_id e, C0& c0, C1& c1)
     {
         REQUIRE(e == e0);
         c0.value++;
@@ -252,7 +243,7 @@ TEST_CASE("Test a systems ability to query and process only entities with a "
     REQUIRE_FALSE(w.has<C0>(e2));
 }
 
-TEST_CASE("Systems execute at correct frequencies", "[test]")
+TEST_CASE("Systems execute at correct frequencies")
 {
     world w;
     system_scheduler scheduler;
@@ -277,7 +268,7 @@ TEST_CASE("Systems execute at correct frequencies", "[test]")
     REQUIRE(slow_count == 2);   // 1 Hz system should execute 1 time
 }
 
-TEST_CASE("Systems handle zero-frequency gracefully", "[test]")
+TEST_CASE("Systems handle zero-frequency gracefully")
 {
     world w;
     system_scheduler scheduler;
@@ -297,7 +288,7 @@ TEST_CASE("Systems handle zero-frequency gracefully", "[test]")
     REQUIRE(zero_count == 0);
 }
 
-TEST_CASE("Systems handle varying update rates", "[test]")
+TEST_CASE("Systems handle varying update rates")
 {
     world w;
     system_scheduler scheduler;
@@ -317,7 +308,7 @@ TEST_CASE("Systems handle varying update rates", "[test]")
     REQUIRE(varying_count == 10);
 }
 
-TEST_CASE("Systems handle large time steps", "[test]")
+TEST_CASE("Systems handle large time steps")
 {
     world w;
     system_scheduler scheduler;
@@ -334,7 +325,7 @@ TEST_CASE("Systems handle large time steps", "[test]")
     REQUIRE(large_step_count == 2);
 }
 
-TEST_CASE("Systems handle multiple frequencies", "[test]")
+TEST_CASE("Systems handle multiple frequencies")
 {
     world w;
     system_scheduler scheduler;
@@ -360,7 +351,7 @@ TEST_CASE("Systems handle multiple frequencies", "[test]")
     REQUIRE(slow_count == 1);    // 1 Hz system
 }
 
-TEST_CASE("Systems handle fractional frequencies", "[test]")
+TEST_CASE("Systems handle fractional frequencies")
 {
     world w;
     system_scheduler scheduler;
@@ -381,7 +372,7 @@ TEST_CASE("Systems handle fractional frequencies", "[test]")
     REQUIRE(fractional_count == 2);
 }
 
-TEST_CASE("Systems handle zero delta time", "[test]")
+TEST_CASE("Systems handle zero delta time")
 {
     world w;
     system_scheduler scheduler;
@@ -398,7 +389,7 @@ TEST_CASE("Systems handle zero delta time", "[test]")
     REQUIRE(zero_dt_count == 0);
 }
 
-TEST_CASE("Systems handle negative delta time", "[test]")
+TEST_CASE("Systems handle negative delta time")
 {
     world w;
     system_scheduler scheduler;
@@ -419,7 +410,7 @@ TEST_CASE("Systems handle negative delta time", "[test]")
     REQUIRE(count == 2);
 }
 
-TEST_CASE("Entity count tracking", "[test]")
+TEST_CASE("Entity count tracking")
 {
     world w;
     REQUIRE(w.entity_count() == 0);
@@ -432,7 +423,7 @@ TEST_CASE("Entity count tracking", "[test]")
     REQUIRE(w.entity_count() == 1);
 }
 
-TEST_CASE("Component counting mechanisms", "[test]")
+TEST_CASE("Component counting mechanisms")
 {
     struct Health
     {
@@ -463,7 +454,7 @@ TEST_CASE("Component counting mechanisms", "[test]")
     REQUIRE(w.total_component_count() == 1);
 }
 
-TEST_CASE("Archetype signature management", "[test]")
+TEST_CASE("Archetype signature management")
 {
     struct A
     {
@@ -518,7 +509,7 @@ TEST_CASE("Archetype signature management", "[test]")
     REQUIRE(w.archetype_count() == 0);
 }
 
-TEST_CASE("Component distribution across archetypes", "[test]")
+TEST_CASE("Component distribution across archetypes")
 {
     struct A
     {
@@ -556,7 +547,7 @@ TEST_CASE("Component distribution across archetypes", "[test]")
     REQUIRE(w.archetype_count() == 3); //<A>, <A, B>, <B>
 }
 
-TEST_CASE("Entity inspection", "[test]")
+TEST_CASE("Entity inspection")
 {
     struct Transform
     {
@@ -581,400 +572,3 @@ TEST_CASE("Entity inspection", "[test]")
     w.remove<Transform>(e);
     REQUIRE(w.components_in_entity(e) == 1);
 }
-
-namespace
-{
-    // Benchmark components
-    struct Position
-    {
-        float x, y;
-    };
-    struct Velocity
-    {
-        float dx, dy;
-    };
-    struct Health
-    {
-        int value;
-    };
-    struct BigData
-    {
-        char buffer[4096];
-    };
-
-    // Benchmark entity counts
-    constexpr int SMALL = 1'000;
-    constexpr int MEDIUM = 5'000;
-    constexpr int LARGE = 10'000;
-} // namespace
-
-TEST_CASE("Core operations benchmarks", "[benchmark]")
-{
-    BENCHMARK_ADVANCED("Create entities [1000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < SMALL; ++i)
-                {
-                    w.make_entity();
-                }
-                return w.entity_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Create entities [5000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < MEDIUM; ++i)
-                {
-                    w.make_entity();
-                }
-                return w.entity_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Create entities [10000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < LARGE; ++i)
-                {
-                    w.make_entity();
-                }
-                return w.entity_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Create entities with components [1000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < SMALL; ++i)
-                {
-                    auto e = w.make_entity();
-                    w.set<Position>(e, {1.0f, 2.0f});
-                    w.set<Velocity>(e, {3.0f, 4.0f});
-                }
-                return w.total_component_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Create entities with components [5000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < MEDIUM; ++i)
-                {
-                    auto e = w.make_entity();
-                    w.set<Position>(e, {1.0f, 2.0f});
-                    w.set<Velocity>(e, {3.0f, 4.0f});
-                }
-                return w.total_component_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Create entities with components [10000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < LARGE; ++i)
-                {
-                    auto e = w.make_entity();
-                    w.set<Position>(e, {1.0f, 2.0f});
-                    w.set<Velocity>(e, {3.0f, 4.0f});
-                }
-                return w.total_component_count();
-            });
-    };
-}
-
-TEST_CASE("Component operations benchmarks", "[benchmark]")
-{
-    BENCHMARK_ADVANCED("Add component to existing entities [1000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < SMALL; ++i)
-        {
-            entities.push_back(w.make_entity());
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.set<Health>(e, {100});
-                }
-                return w.component_count<Health>();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Add component to existing entities [5000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < MEDIUM; ++i)
-        {
-            entities.push_back(w.make_entity());
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.set<Health>(e, {100});
-                }
-                return w.component_count<Health>();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Add component to existing entities [10000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < LARGE; ++i)
-        {
-            entities.push_back(w.make_entity());
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.set<Health>(e, {100});
-                }
-                return w.component_count<Health>();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Remove component from entities [1000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < SMALL; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<Health>(e, {100});
-            entities.push_back(e);
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.remove<Health>(e);
-                }
-                return w.component_count<Health>();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Remove component from entities [5000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < MEDIUM; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<Health>(e, {100});
-            entities.push_back(e);
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.remove<Health>(e);
-                }
-                return w.component_count<Health>();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Remove component from entities [10000]")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < LARGE; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<Health>(e, {100});
-            entities.push_back(e);
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.remove<Health>(e);
-                }
-                return w.component_count<Health>();
-            });
-    };
-}
-
-TEST_CASE("Query performance benchmarks", "[benchmark]")
-{
-    BENCHMARK_ADVANCED("Dense query (90% match)")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        for(int i = 0; i < LARGE; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<Position>(e);
-            if(i % 10 != 0)
-                w.set<Velocity>(e); // 90% match
-        }
-
-        meter.measure(
-            [&]
-            {
-                int count = 0;
-                w.query<Position, Velocity>([&](auto...) { count++; });
-                return count;
-            });
-    };
-
-    BENCHMARK_ADVANCED("Sparse query (10% match)")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        for(int i = 0; i < LARGE; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<Position>(e);
-            if(i % 10 == 0)
-                w.set<Velocity>(e); // 10% match
-        }
-
-        meter.measure(
-            [&]
-            {
-                int count = 0;
-                w.query<Position, Velocity>([&](auto...) { count++; });
-                return count;
-            });
-    };
-}
-
-TEST_CASE("Memory intensive benchmarks", "[benchmark]")
-{
-    BENCHMARK_ADVANCED("Large component allocation")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        meter.measure(
-            [&]
-            {
-                world w;
-                for(int i = 0; i < SMALL; ++i)
-                {
-                    auto e = w.make_entity();
-                    w.set<BigData>(e);
-                }
-                return w.total_component_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Component memory reuse")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < SMALL; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<BigData>(e);
-            entities.push_back(e);
-        }
-
-        meter.measure(
-            [&]
-            {
-                // Remove and re-add components
-                for(auto e: entities)
-                {
-                    w.remove<BigData>(e);
-                    w.set<BigData>(e);
-                }
-                return w.component_count<BigData>();
-            });
-    };
-}
-
-TEST_CASE("Archetype transition benchmarks", "[benchmark]")
-{
-    BENCHMARK_ADVANCED("Single component addition")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < MEDIUM; ++i)
-        {
-            entities.push_back(w.make_entity());
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.set<Health>(e);
-                }
-                return w.archetype_count();
-            });
-    };
-
-    BENCHMARK_ADVANCED("Multi-component transition")(
-        Catch::Benchmark::Chronometer meter)
-    {
-        world w;
-        std::vector<entity_id> entities;
-        for(int i = 0; i < MEDIUM; ++i)
-        {
-            auto e = w.make_entity();
-            w.set<Position>(e);
-            entities.push_back(e);
-        }
-
-        meter.measure(
-            [&]
-            {
-                for(auto e: entities)
-                {
-                    w.set<Velocity>(e);
-                    w.set<Health>(e);
-                }
-                return w.archetype_count();
-            });
-    };
-}

zecsy.hpp

@@ -97,7 +97,7 @@ namespace zecsy
         std::unordered_map<comp_id, component_pool> pools;
 
         using archetype_signature = std::vector<comp_id>;
-        using entity_group = std::set<entity_id>;
+        using entity_group = std::vector<entity_id>;
 
         struct archetype_hash
         {
@@ -186,7 +186,7 @@ namespace zecsy
 
         std::vector<comp_id> key;
         auto& group = archetypes[key];
-        group.emplace(id);
+        group.emplace_back(id);
 
         return id;
     }
@@ -199,7 +199,7 @@ namespace zecsy
         std::vector<comp_id> key(comp_set.begin(), comp_set.end());
 
         auto& group = archetypes[key];
-        group.erase(e);
+        group.erase(std::remove(group.begin(), group.end(), e), group.end());
 
         if(archetypes[key].empty())
         {
@@ -279,7 +279,8 @@ namespace zecsy
             std::vector<comp_id> old_key(old_set.begin(), old_set.end());
 
             auto& group = archetypes[old_key];
-            group.erase(e);
+            group.erase(std::remove(group.begin(), group.end(), e),
+                        group.end());
 
             if(archetypes[old_key].empty())
             {
@@ -287,7 +288,7 @@ namespace zecsy
             }
 
             std::vector<comp_id> new_key(comp_set.begin(), comp_set.end());
-            archetypes[new_key].emplace(e);
+            archetypes[new_key].emplace_back(e);
         }
     }
 
@@ -310,12 +311,13 @@ namespace zecsy
             std::sort(old_key.begin(), old_key.end());
 
             auto& old_group = archetypes[old_key];
-            old_group.erase(e);
+            old_group.erase(std::remove(old_group.begin(), old_group.end(), e),
+                            old_group.end());
 
             std::vector<comp_id> new_key(comp_set.begin(), comp_set.end());
             std::sort(new_key.begin(), new_key.end());
 
-            archetypes[new_key].emplace(e);
+            archetypes[new_key].emplace_back(e);
 
             if(archetypes[old_key].empty())
             {