From 207ee62eaabac19e5a24e45adf773f81ca48f896 Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Tue, 25 Jan 2022 17:16:28 -0700
Subject: Implement simple train car

For now, the car just exists at a certain tile and has a 'progress'
timer until it moves to the next track tile.
---
 train.cpp | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 train.cpp

(limited to 'train.cpp')

diff --git a/train.cpp b/train.cpp
new file mode 100644
index 0000000..e369887
--- /dev/null
+++ b/train.cpp
@@ -0,0 +1,52 @@
+#include "train.h"
+
+#include "level.h"
+#include "bitmap.h"
+
+void TrainCar::update(Level& level)
+{
+	auto tile = level.get(x, y);
+	if (tile == 0)
+		return;
+
+	if (m_progress < 12) {
+		m_progress++;
+		return;
+	}
+	else {
+		m_progress = 0;
+	}
+
+	auto n = level.get(x, y - 1);
+	auto e = level.get(x + 1, y);
+	auto s = level.get(x, y + 1);
+	auto w = level.get(x - 1, y);
+
+	if (m_dir == North) {
+		if (n == SouthEast) m_dir = East;
+		if (n == SouthWest) m_dir = West;
+		y--;
+	}
+	else if (m_dir == East) {
+		if (e == NorthWest) m_dir = North;
+		if (e == SouthWest) m_dir = South;
+		x++;
+	}
+	else if (m_dir == South) {
+		if (s == NorthEast) m_dir = East;
+		if (s == NorthWest) m_dir = West;
+		y++;
+	}
+	else if (m_dir == West) {
+		if (w == NorthEast) m_dir = North;
+		if (w == SouthEast) m_dir = South;
+		x--;
+	}
+}
+
+void TrainCar::draw(Bitmap& bitmap, int xo, int yo)
+{
+	int xx = (x - y) * (24 / 2) - xo;
+	int yy = (x + y) * (24 / 4) - yo;
+	bitmap.blit(m_sprite, xx, yy, 0, 0, 24, 24);
+}
\ No newline at end of file
-- 
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