From eb8b919a1a224c0d6f206d1d29a9b4b8c3a0cac8 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 27 Mar 2015 09:12:58 +0200
Subject: [PATCH] Add an option to set simulation speed

Useful for testing long timetables.  Will cause problems if used with a
physical layout; currently there are no checks to prevent it.
---
 source/engineer/engineer.cpp | 2 +-
 source/engineer/options.cpp  | 4 +++-
 source/engineer/options.h    | 1 +
 source/libr2c2/layout.cpp    | 3 ++-
 source/libr2c2/layout.h      | 2 +-
 5 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/source/engineer/engineer.cpp b/source/engineer/engineer.cpp
index 36412cf..ef5b54d 100644
--- a/source/engineer/engineer.cpp
+++ b/source/engineer/engineer.cpp
@@ -170,7 +170,7 @@ void Engineer::tick()
 		process_new_train(**i);
 	new_trains.clear();
 
-	layout.tick();
+	layout.tick(options.sim_speed);
 	layout_3d.tick();
 	event_disp.tick(Time::zero);
 
diff --git a/source/engineer/options.cpp b/source/engineer/options.cpp
index 89e1fd1..bdac361 100644
--- a/source/engineer/options.cpp
+++ b/source/engineer/options.cpp
@@ -13,7 +13,8 @@ Options::Options(int argc, char **argv):
 	fullscreen(false),
 	debug(false),
 	network(false),
-	simulate(false)
+	simulate(false),
+	sim_speed(1.0f)
 {
 	string res;
 
@@ -23,6 +24,7 @@ Options::Options(int argc, char **argv):
 	getopt.add_option('g', "debug",       debug,       GetOpt::NO_ARG);
 	getopt.add_option('d', "driver",      driver,      GetOpt::REQUIRED_ARG);
 	getopt.add_option('s', "simulate",    simulate,    GetOpt::NO_ARG);
+	getopt.add_option(     "sim-speed",   sim_speed,   GetOpt::REQUIRED_ARG);
 	getopt.add_option('n', "network",     network,     GetOpt::NO_ARG);
 	getopt.add_option(     "state",       state_fn,    GetOpt::REQUIRED_ARG);
 	getopt(argc, argv);
diff --git a/source/engineer/options.h b/source/engineer/options.h
index ddeb62e..f64cc78 100644
--- a/source/engineer/options.h
+++ b/source/engineer/options.h
@@ -12,6 +12,7 @@ struct Options
 	std::string driver;
 	bool network;
 	bool simulate;
+	float sim_speed;
 	std::string layout_fn;
 	std::string state_fn;
 
diff --git a/source/libr2c2/layout.cpp b/source/libr2c2/layout.cpp
index 70a9f10..0aa5333 100644
--- a/source/libr2c2/layout.cpp
+++ b/source/libr2c2/layout.cpp
@@ -414,7 +414,7 @@ void Layout::remove_train(Train &t)
 		signal_train_removed.emit(t);
 }
 
-void Layout::tick()
+void Layout::tick(float speed)
 {
 	if(driver)
 		driver->tick();
@@ -425,6 +425,7 @@ void Layout::tick()
 		dt = t-last_tick;
 	last_tick = t;
 
+	dt *= speed;
 	unsigned count = dt/(10*Time::msec)+1;
 	dt /= count;
 	while(count--)
diff --git a/source/libr2c2/layout.h b/source/libr2c2/layout.h
index 2488f93..4bccb20 100644
--- a/source/libr2c2/layout.h
+++ b/source/libr2c2/layout.h
@@ -151,7 +151,7 @@ public:
 	const std::map<unsigned, Train *> &get_trains() const { return trains; }
 	void remove_train(Train &);
 
-	void tick();
+	void tick(float = 1.0f);
 private:
 	void step(const Msp::Time::TimeDelta &);
 public:
-- 
2.43.0