From 3e326085fa69da20e0a81182cbea4466016eb566 Mon Sep 17 00:00:00 2001
From: maedhros <maedhros@openttd.org>
Date: Mon, 11 Jun 2007 14:00:16 +0000
Subject: (svn r10097) -Feature: Add support for articulated road vehicles, or
 callbacks 11 and 17 for road vehicles for those who prefer the technical
 explanation.

---
 src/roadveh.h | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

(limited to 'src/roadveh.h')

diff --git a/src/roadveh.h b/src/roadveh.h
index f3c2f46d8..6547d7442 100644
--- a/src/roadveh.h
+++ b/src/roadveh.h
@@ -8,6 +8,42 @@
 #include "vehicle.h"
 
 
+enum RoadVehicleSubType {
+	RVST_FRONT,
+	RVST_ARTIC_PART,
+};
+
+static inline bool IsRoadVehFront(const Vehicle *v)
+{
+	assert(v->type == VEH_ROAD);
+	return v->subtype == RVST_FRONT;
+}
+
+static inline void SetRoadVehFront(Vehicle *v)
+{
+	assert(v->type == VEH_ROAD);
+	v->subtype = RVST_FRONT;
+}
+
+static inline bool IsRoadVehArticPart(const Vehicle *v)
+{
+	assert(v->type == VEH_ROAD);
+	return v->subtype == RVST_ARTIC_PART;
+}
+
+static inline void SetRoadVehArticPart(Vehicle *v)
+{
+	assert(v->type == VEH_ROAD);
+	v->subtype = RVST_ARTIC_PART;
+}
+
+static inline bool RoadVehHasArticPart(const Vehicle *v)
+{
+	assert(v->type == VEH_ROAD);
+	return v->next != NULL && IsRoadVehArticPart(v->next);
+}
+
+
 static inline bool IsRoadVehInDepot(const Vehicle* v)
 {
 	assert(v->type == VEH_ROAD);
@@ -43,7 +79,12 @@ struct RoadVehicle : public Vehicle {
 	void UpdateDeltaXY(Direction direction);
 	ExpensesType GetExpenseType(bool income) const { return income ? EXPENSES_ROADVEH_INC : EXPENSES_ROADVEH_RUN; }
 	WindowClass GetVehicleListWindowClass() const { return WC_ROADVEH_LIST; }
-	bool IsPrimaryVehicle() const { return true; }
+	bool IsPrimaryVehicle() const { return IsRoadVehFront(this); }
+	bool HasFront() const { return true; }
 };
 
+byte GetRoadVehLength(const Vehicle *v);
+
+void RoadVehUpdateCache(Vehicle *v);
+
 #endif /* ROADVEH_H */
-- 
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