feat(platformer): add death and respawn

platformer/CMakeLists.txt

@@ -16,6 +16,8 @@ add_executable(platformer
     src/collider_gizmos/plugin.cpp
     src/offset/plugin.cpp
     src/offset/offset.cpp
+    src/death/plugin.cpp
+    src/death/dead.cpp
 )
 
 target_link_libraries(platformer tesseratos)

platformer/src/death/dead.cpp

@@ -0,0 +1,8 @@
+#include "dead.hpp"
+
+#include <cubos/core/ecs/component/reflection.hpp>
+
+CUBOS_REFLECT_IMPL(demo::Dead)
+{
+    return cubos::core::ecs::ComponentTypeBuilder<Dead>("demo::Dead").build();
+}

platformer/src/death/dead.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <cubos/core/reflection/reflect.hpp>
+
+namespace demo
+{
+    struct [[cubos::component("")]] Dead
+    {
+        CUBOS_REFLECT;
+    };
+} // namespace demo

platformer/src/death/plugin.cpp

@@ -0,0 +1,44 @@
+#include "plugin.hpp"
+
+#include <cubos/engine/collisions/collider.hpp>
+
+#include "../player/player.hpp"
+#include "dead.hpp"
+
+using cubos::core::ecs::Commands;
+using cubos::core::ecs::Query;
+using cubos::core::ecs::Read;
+using cubos::core::ecs::Write;
+
+using namespace cubos::engine;
+
+using namespace demo;
+
+#define DEATH_HEIGHT -10.0F
+
+static void fallDetectionSystem(Commands cmds, Query<Write<Player>, Read<Collider>> query)
+{
+    for (auto [entity, player, collider] : query)
+    {
+        if (collider->worldAABB.diag[1].y < DEATH_HEIGHT)
+        {
+            cmds.add(entity, Dead{});
+        }
+    }
+}
+
+static void killSystem(Commands cmds, Query<Read<Player>, Read<Dead>> query)
+{
+    for (auto [entity, player, dead] : query)
+    {
+        cmds.destroy(entity);
+    }
+}
+
+void demo::deathPlugin(Cubos& cubos)
+{
+    cubos.addComponent<Dead>();
+
+    cubos.system(fallDetectionSystem).before("kill");
+    cubos.system(killSystem).tagged("kill");
+}

platformer/src/death/plugin.hpp

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <cubos/engine/cubos.hpp>
+
+namespace demo
+{
+    void deathPlugin(cubos::engine::Cubos& cubos);
+}

platformer/src/main.cpp

@@ -17,6 +17,7 @@
 #include "spawn/plugin.hpp"
 #include "collider_gizmos/plugin.hpp"
 #include "offset/plugin.hpp"
+#include "death/plugin.hpp"
 
 using cubos::core::ecs::Commands;
 using cubos::core::ecs::Query;
@@ -72,6 +73,7 @@ int main(int argc, char** argv)
     cubos.addPlugin(demo::spawnPlugin);
     cubos.addPlugin(demo::colliderGizmosPlugin);
     cubos.addPlugin(demo::offsetPlugin);
+    cubos.addPlugin(demo::deathPlugin);
 
     cubos.startupSystem(settings).tagged("cubos.settings");
     cubos.startupSystem(setup).tagged("cubos.assets").after("cubos.renderer.init");

platformer/src/offset/plugin.cpp

@@ -5,6 +5,7 @@
 
 #include <glm/gtc/matrix_transform.hpp>
 
+using cubos::core::ecs::Commands;
 using cubos::core::ecs::Query;
 using cubos::core::ecs::Read;
 using cubos::core::ecs::Write;
@@ -13,10 +14,16 @@ using namespace cubos::engine;
 
 using namespace demo;
 
-static void offsetSystem(Query<Read<Offset>> offsets, Query<Write<LocalToWorld>> localToWorlds)
+static void offsetSystem(Commands cmds, Query<Read<Offset>> offsets, Query<Write<LocalToWorld>> localToWorlds)
 {
     for (auto [entity, offset] : offsets)
     {
+        if (!localToWorlds[offset->parent])
+        {
+            cmds.destroy(entity);
+            continue;
+        }
+
         auto [entityLocalToWorld] = *localToWorlds[entity];
         auto [parentLocalToWorld] = *localToWorlds[offset->parent];
         entityLocalToWorld->mat = parentLocalToWorld->mat * glm::translate(glm::mat4(1.0f), offset->vec);