[entity] Starting work on entity system.

1 files changed, 61 insertions, 0 deletions

diff --git a/yage/entity/space.h b/yage/entity/space.h
new file mode 100644
index 00000000..e69df37a
--- /dev/null
+++ b/yage/entity/space.h
@@ -0,0 +1,61 @@
+/** ---------------------------------------------------------------------------
+ * @file: space.h
+ *
+ * Copyright (c) 2017 Yann Herklotz Grave <ymherklotz@gmail.com>
+ * MIT License, see LICENSE file for more details.
+ * ----------------------------------------------------------------------------
+ */
+
+#ifndef YAGE_ENGINE_SPACE_H
+#define YAGE_ENGINE_SPACE_H
+
+#include <vector>
+
+#include "entitymanager.h"
+
+namespace yage
+{
+
+class System;
+
+/**
+ * Space that keeps track of all the entities, componenets and runs the systems
+ * on the data to update them. There can be multiple instances of a space, which
+ * can be used, for example, for different levels in the game that can be loaded
+ * separately, or a game menu that can be loaded above the other spaces when the
+ * user presses on pause.
+ */
+class Space
+{
+public:
+    /**
+     * Default instance for a space.
+     */
+    Space();
+
+    /**
+     * Create an entity that will belong to this space, and return the handle to
+     * the user. The Entity class itself should not be visible to the user, as
+     * the user only needs to worry about the handle when referring to the
+     * Entity and changing it.
+     */
+    unsigned createEntity();
+
+private:
+    /**
+     * The subspaces of the Space that act on the data and on their respective
+     * component. These are specific to the Space, as other spaces might have
+     * different Systems and not act on the same entities.
+     */
+    std::vector<System *> systems_;
+
+    /**
+     * Manages all the entities in the system, can create them for the current
+     * space.
+     */
+    EntityManager em_;
+};
+
+} // namespace yage
+
+#endif