From 0d99c20d0fafcf2b86d9d33430659de76b030395 Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Thu, 24 Mar 2022 08:45:00 -0600
Subject: Add acceleration/deceleration to the train

---
 src/main.cpp  | 1 +
 src/train.cpp | 3 ++-
 src/train.h   | 4 +++-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 436660c..28b2281 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -54,6 +54,7 @@ int main(int argc, char** argv)
 			int my = y / Scale + yOffs;
 			auto pos = ScreenToTile({ mx, my });
 			engine.setPosition(pos.x, pos.y);
+			engine.setSpeed(0.2f);
 		}
 	});
 
diff --git a/src/train.cpp b/src/train.cpp
index 7ce1c2d..d3ea7fb 100644
--- a/src/train.cpp
+++ b/src/train.cpp
@@ -14,6 +14,7 @@ void Train::update()
 			return;
 	}
 
+	m_speed *= m_acceleration;
 	if (m_progress < 1.f) {
 		m_progress += m_speed;
 		return;
@@ -48,8 +49,8 @@ void Train::setPosition(int tx, int ty)
 {
 	x = tx;
 	y = ty;
-
 	m_progress = 0.f;
+
 	findDirection();
 	findNextTile();
 }
diff --git a/src/train.h b/src/train.h
index 3cd23e4..178583f 100644
--- a/src/train.h
+++ b/src/train.h
@@ -14,6 +14,7 @@ public:
 	void draw(Bitmap&, int, int);
 
 	void setPosition(int x, int y);
+	void setSpeed(float speed) { m_speed = speed; };
 	// Add a vehicle to the end of this train
 	void addVehicle(Train*);
 
@@ -28,7 +29,8 @@ private:
 	Level& m_level;
 
 	int x { 0 }, y { 0 };
-	float m_speed { 0.05f };
+	float m_speed { 0.f };
+	float m_acceleration { 0.98f };
 	float m_progress { 0.f };
 
 	Direction m_dir { North };
-- 
cgit v1.2.3