From 48cd8419bb274345fe386d47843f9aa16910e090 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Wed, 27 Sep 2017 11:35:22 -0400
Subject: lua-scripted wandering

---
 include/components/wander.hpp | 12 ++++----
 include/quest.hpp             |  3 ++
 include/systems/lua.hpp       | 68 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+), 5 deletions(-)
 create mode 100644 include/systems/lua.hpp

(limited to 'include')

diff --git a/include/components/wander.hpp b/include/components/wander.hpp
index 2001e89..d275158 100644
--- a/include/components/wander.hpp
+++ b/include/components/wander.hpp
@@ -1,16 +1,18 @@
 #ifndef COMPONENTS_WANDER_HPP_
 #define COMPONENTS_WANDER_HPP_
 
+#include <string>
+
+#include <systems/lua.hpp>
+
 /**
  * Causes the entity to wander about.
  */
 struct Wander {
-	Wander(float ix = 0, float r = 0)
-		: initialX(ix), range(r), countdown(0) {}
+	Wander(const std::string& s = "")
+		: script(LuaSystem::makeScript(s)) {}
 
-	float initialX;
-	float range;
-	int countdown;
+	LuaScript script;
 };
 
 #endif // COMPONENTS_WANDER_HPP_
diff --git a/include/quest.hpp b/include/quest.hpp
index 3358d8f..b42f756 100644
--- a/include/quest.hpp
+++ b/include/quest.hpp
@@ -78,6 +78,9 @@ public:
 			titles.emplace_front(q.name);
 		return titles;
 	}
+
+	static void save(void);
+	static void load(void);
 };
 
 #endif // QUEST_HPP_
diff --git a/include/systems/lua.hpp b/include/systems/lua.hpp
new file mode 100644
index 0000000..0d8528b
--- /dev/null
+++ b/include/systems/lua.hpp
@@ -0,0 +1,68 @@
+#ifndef SYSTEMS_LUA_HPP_
+#define SYSTEMS_LUA_HPP_
+
+#include <string>
+#include <lua.hpp>
+
+#include <vector2.hpp>
+
+class LuaScript {
+private:
+	lua_State* state;
+	std::string script;
+
+public:
+	LuaScript(const std::string& sc = "")
+		: script(sc) {
+		state = luaL_newstate();
+		luaL_openlibs(state);
+		luaL_loadstring(state, script.c_str());
+		lua_pcall(state, 0, 0, 0);
+	}
+
+	inline auto operator()(void) {
+		lua_getglobal(state, "update");
+		lua_pcall(state, 0, LUA_MULTRET, 0);
+		if (lua_gettop(state) != 2)
+			return vec2();
+		vec2 ret (lua_tonumber(state, 1), lua_tonumber(state, 2));
+		lua_pop(state, 2);
+		return ret;
+	}
+};
+
+class LuaSystem {
+private:
+	class LuaInterpreter {
+	private:
+		lua_State* state;
+
+	public:
+		LuaInterpreter(void) {
+			state = luaL_newstate();
+			luaL_openlibs(state);
+		}
+
+		void registerFunc(const std::string& name, lua_CFunction func) {
+			lua_pushcclosure(state, func, 0);
+			lua_setglobal(state, name.c_str());
+		}
+
+		void loadFile(const std::string& name) {
+			luaL_dofile(state, name.c_str());
+			lua_pcall(state, 0, 0, 0); // 'prime' the file
+		}
+
+		void runFunc(const std::string& name) {
+			lua_getglobal(state, name.c_str());
+			lua_pcall(state, 0, 0, 0);
+		}
+	};
+
+public:
+	inline static LuaScript makeScript(const std::string& s) {
+		return LuaScript(s);
+	}
+};
+
+#endif // SYSTEMS_LUA_HPP_
-- 
cgit v1.2.3