From 267314b4d0a28ac8a9d5b0d44a7c6dcd7ef88ac1 Mon Sep 17 00:00:00 2001
From: peter1138 <peter1138@openttd.org>
Date: Sat, 5 Nov 2005 16:07:26 +0000
Subject: (svn r3139) -NewGRF, Feature: support for articulated rail vehicles.
 This is used, for example, by coal tenders.

---
 vehicle.h | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'vehicle.h')

diff --git a/vehicle.h b/vehicle.h
index be2b120d4..91921d4ba 100644
--- a/vehicle.h
+++ b/vehicle.h
@@ -30,6 +30,7 @@ enum VehStatus {
 // 1 and 3 do not appear to be used
 typedef enum TrainSubtypes {
 	TS_Front_Engine = 0, // Leading engine of a train
+	TS_Artic_Part = 1,   // Articulated part of an engine
 	TS_Not_First = 2,    // Wagon or additional engine
 	TS_Free_Car = 4,     // First in a wagon chain (in depot)
 } TrainSubtype;
@@ -414,6 +415,41 @@ static inline bool IsVehicleIndex(uint index)
 	return index < GetVehiclePoolSize();
 }
 
+/**
+ * Get the next real (non-articulated part) vehicle in the consist.
+ * @param v Vehicle.
+ * @return Next vehicle in the consist.
+ */
+static inline Vehicle *GetNextVehicle(const Vehicle *v)
+{
+	Vehicle *u = v->next;
+	while (u != NULL && u->subtype == TS_Artic_Part) {
+		u = u->next;
+	}
+	return u;
+}
+
+/**
+ * Check if an engine has an articulated part.
+ * @param v Vehicle.
+ * @return True if the engine has an articulated part.
+ */
+static inline bool EngineHasArticPart(const Vehicle *v)
+{
+	return (v->next != NULL && v->next->subtype == TS_Artic_Part);
+}
+
+/**
+ * Get the last part of a multi-part engine.
+ * @param v Vehicle.
+ * @return Last part of the engine.
+ */
+static inline Vehicle *GetLastEnginePart(Vehicle *v)
+{
+	while (EngineHasArticPart(v)) v = v->next;
+	return v;
+}
+
 /* Returns order 'index' of a vehicle or NULL when it doesn't exists */
 static inline Order *GetVehicleOrder(const Vehicle *v, int index)
 {
-- 
cgit v1.2.3-54-g00ecf