From 4562557d599fd70d32b15313ffebd976c3ddfa7d Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 14 Feb 2021 16:44:00 +0000
Subject: Maintain a history of links traversed

---
 game/vehicles/vehicle.h | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

(limited to 'game/vehicles/vehicle.h')

diff --git a/game/vehicles/vehicle.h b/game/vehicles/vehicle.h
index d59588c..f7defb3 100644
--- a/game/vehicles/vehicle.h
+++ b/game/vehicles/vehicle.h
@@ -6,13 +6,26 @@
 #include <game/worldobject.h>
 #include <string>
 
+class LinkHistory {
+public:
+	using Entry = std::pair<LinkWPtr, unsigned char /*dir*/>;
+	using Return = std::pair<LinkCPtr, unsigned char /*dir*/>;
+	Return add(const LinkWPtr &, unsigned char);
+	Return getAt(float) const;
+
+private:
+	std::vector<Entry> links;
+	float totalLen;
+};
+
 class Vehicle : public WorldObject, public Physical {
 public:
 	Vehicle(const LinkPtr & link, const std::string & obj, const std::string & tex);
-	LinkWPtr link; // Which link are we travelling along
-	unsigned char linkDir {0}; // Starting end e0->e1 or e1->e0
 	float linkDist {0}; // distance long current link
 	float speed {50}; // speed in m/s (~75 km/h)
+
+protected:
+	LinkHistory linkHist;
 };
 
 #endif
-- 
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