From fe44274be041e125cd1be9bbfba26b2894ed51fd Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Mon, 28 Feb 2022 19:10:09 -0700
Subject: Quick and simple multi-car train implementation

---
 src/train.cpp | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)

(limited to 'src/train.cpp')

diff --git a/src/train.cpp b/src/train.cpp
index 98a493f..2604898 100644
--- a/src/train.cpp
+++ b/src/train.cpp
@@ -5,15 +5,29 @@
 
 void Train::update(Level& level)
 {
-	auto tile = level.get(x, y);
-	if (tile == 0)
-		return;
+	if (m_next) {
+		m_speed = m_next->m_speed;
+		m_progress = m_next->m_progress;
+	} else {
+		auto tile = level.get(x, y);
+		if (tile == 0)
+			return;
+	}
 
 	if (m_progress < 1.f) {
 		m_progress += m_speed;
 		return;
 	}
 
+	if (m_next) {
+		x = m_nextX;
+		y = m_nextY;
+		m_nextX = m_next->x;
+		m_nextY = m_next->y;
+		m_progress = 0.f;
+		findDirection();
+	}
+
 	setPosition(m_nextX, m_nextY);
 }
 
@@ -40,6 +54,16 @@ void Train::setPosition(int tx, int ty)
 	findNextTile();
 }
 
+void Train::addVehicle(Train* newTrain)
+{
+	if (!m_prev) {
+		m_prev = newTrain;
+		newTrain->m_next = this;
+	} else {
+		m_prev->addVehicle(newTrain);
+	}
+}
+
 void Train::findDirection()
 {
 	auto tile = m_level.get(x, y);
@@ -81,4 +105,4 @@ void Train::findNextTile()
 		m_nextX = x - 1;
 		m_nextY = y;
 	}
-}
\ No newline at end of file
+}
-- 
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