From ca327c950dd82ba5ef1ee035b40a42d03f9abbec Mon Sep 17 00:00:00 2001
From: BlackMATov <blackmatov@gmail.com>
Date: Wed, 4 Dec 2019 22:39:02 +0700
Subject: [PATCH] dummy physics system

---
 headers/enduro2d/high/_all.hpp                |  1 +
 headers/enduro2d/high/_high.hpp               |  1 +
 .../enduro2d/high/systems/physics_system.hpp  | 26 +++++++++++
 sources/enduro2d/high/starter.cpp             |  3 ++
 .../enduro2d/high/systems/physics_system.cpp  | 43 +++++++++++++++++++
 5 files changed, 74 insertions(+)
 create mode 100644 headers/enduro2d/high/systems/physics_system.hpp
 create mode 100644 sources/enduro2d/high/systems/physics_system.cpp

diff --git a/headers/enduro2d/high/_all.hpp b/headers/enduro2d/high/_all.hpp
index f83d7315..4db05a3f 100644
--- a/headers/enduro2d/high/_all.hpp
+++ b/headers/enduro2d/high/_all.hpp
@@ -49,6 +49,7 @@
 #include "systems/flipbook_system.hpp"
 #include "systems/input_system.hpp"
 #include "systems/label_system.hpp"
+#include "systems/physics_system.hpp"
 #include "systems/render_system.hpp"
 #include "systems/script_system.hpp"
 #include "systems/spine_system.hpp"
diff --git a/headers/enduro2d/high/_high.hpp b/headers/enduro2d/high/_high.hpp
index ee56ce97..625668a0 100644
--- a/headers/enduro2d/high/_high.hpp
+++ b/headers/enduro2d/high/_high.hpp
@@ -69,6 +69,7 @@ namespace e2d
     class flipbook_system;
     class input_system;
     class label_system;
+    class physics_system;
     class render_system;
     class script_system;
     class spine_system;
diff --git a/headers/enduro2d/high/systems/physics_system.hpp b/headers/enduro2d/high/systems/physics_system.hpp
new file mode 100644
index 00000000..eda2a797
--- /dev/null
+++ b/headers/enduro2d/high/systems/physics_system.hpp
@@ -0,0 +1,26 @@
+/*******************************************************************************
+ * This file is part of the "Enduro2D"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include "_systems.hpp"
+
+namespace e2d
+{
+    class physics_system final
+        : public ecs::system<ecs::after<systems::update_event>> {
+    public:
+        physics_system();
+        ~physics_system() noexcept final;
+
+        void process(
+            ecs::registry& owner,
+            const ecs::after<systems::update_event>& trigger) override;
+    private:
+        class internal_state;
+        std::unique_ptr<internal_state> state_;
+    };
+}
diff --git a/sources/enduro2d/high/starter.cpp b/sources/enduro2d/high/starter.cpp
index 5654b2b5..00dc6fbc 100644
--- a/sources/enduro2d/high/starter.cpp
+++ b/sources/enduro2d/high/starter.cpp
@@ -33,6 +33,7 @@
 #include <enduro2d/high/systems/flipbook_system.hpp>
 #include <enduro2d/high/systems/input_system.hpp>
 #include <enduro2d/high/systems/label_system.hpp>
+#include <enduro2d/high/systems/physics_system.hpp>
 #include <enduro2d/high/systems/render_system.hpp>
 #include <enduro2d/high/systems/script_system.hpp>
 #include <enduro2d/high/systems/spine_system.hpp>
@@ -61,6 +62,8 @@ namespace
                     .add_system<input_system>())
                 .feature<struct label_feature>(ecs::feature()
                     .add_system<label_system>())
+                .feature<struct physics_feature>(ecs::feature()
+                    .add_system<physics_system>())
                 .feature<struct render_feature>(ecs::feature()
                     .add_system<render_system>())
                 .feature<struct sript_feature>(ecs::feature()
diff --git a/sources/enduro2d/high/systems/physics_system.cpp b/sources/enduro2d/high/systems/physics_system.cpp
new file mode 100644
index 00000000..d3733009
--- /dev/null
+++ b/sources/enduro2d/high/systems/physics_system.cpp
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * This file is part of the "Enduro2D"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include <enduro2d/high/systems/physics_system.hpp>
+
+namespace
+{
+    using namespace e2d;
+}
+
+namespace e2d
+{
+    //
+    // physics_system::internal_state
+    //
+
+    class physics_system::internal_state final : private noncopyable {
+    public:
+        internal_state() = default;
+        ~internal_state() noexcept = default;
+
+        void process(f32 dt, ecs::registry& owner) {
+        }
+    };
+
+    //
+    // physics_system
+    //
+
+    physics_system::physics_system()
+    : state_(new internal_state()) {}
+    physics_system::~physics_system() noexcept = default;
+
+    void physics_system::process(
+        ecs::registry& owner,
+        const ecs::after<systems::update_event>& trigger)
+    {
+        state_->process(trigger.event.dt, owner);
+    }
+}