Cheaper lines (and single lines)

src/app.h

@@ -14,6 +14,8 @@ struct App{
 	std::vector<User*> people_online;
 	libwebsocket * uberclient{nullptr};
 
+	std::vector<AbstractLine> lines;
+
 	simu_type sim;
 	beat_type beat;
 
@@ -29,6 +31,7 @@ struct App{
 	}
 
 	void add_line(AbstractLine const & line){
+		lines.push_back(line);
 		for(auto & l : line.calculate_lines()){
 			sim.lines.push_back(l);
 		}

src/app_common.h

@@ -85,3 +85,22 @@ BOOST_FUSION_ADAPT_STRUCT(
 	(IntVec2, position)
 	(ball_info, information)
 )
+
+struct cheap_line_type {
+	IntVec2 starting_point;
+	IntVec2 end_point;
+	int line_kind;
+
+	cheap_line_type(AbstractLine const & l)
+	: starting_point(l.starting_point)
+	, end_point(l.end_point)
+	, line_kind(l.line_kind)
+	{}
+};
+
+BOOST_FUSION_ADAPT_STRUCT(
+	cheap_line_type,
+	(IntVec2, starting_point)
+	(IntVec2, end_point)
+	(int, line_kind)
+)

src/main.cpp

@@ -32,7 +32,7 @@ websockets::TestProtocol<User> default_protocol{
 		js::Object ret;
 		ret["balls"] = vector_to_json(app->sim.balls, [](ball_type const & b){return cheap_ball_type(b);});
 		if(user.update_lines){
-			ret["lines"] = vector_to_json(app->sim.lines);
+			ret["lines"] = vector_to_json(app->lines, [](AbstractLine const & l){return cheap_line_type(l);});
 			user.update_lines = false;
 		}
 		return write_json(ret);