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-rw-r--r--src/engine.cpp19
-rw-r--r--src/engine_type.h2
-rw-r--r--src/newgrf.cpp24
-rw-r--r--src/table/engines.h10
4 files changed, 25 insertions, 30 deletions
diff --git a/src/engine.cpp b/src/engine.cpp
index d2a0f2bb6..71e09773b 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -184,6 +184,13 @@ void LoadCustomEngineNames()
DEBUG(misc, 1, "LoadCustomEngineNames: not done");
}
+/* Determine if an engine type is a wagon (and not a loco) */
+static bool IsWagon(EngineID index)
+{
+ const Engine *e = GetEngine(index);
+ return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
+}
+
static void CalcEngineReliability(Engine *e)
{
uint age = e->age;
@@ -256,10 +263,9 @@ void StartupEngines()
e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;
e->duration_phase_3 = GB(r, 9, 7) + 120;
- e->reliability_spd_dec = (ei->unk2&0x7F) << 2;
+ e->reliability_spd_dec = ei->decay_speed << 2;
- /* my invented flag for something that is a wagon */
- if (ei->unk2 & 0x80) {
+ if (IsWagon(e->index)) {
e->age = 0xFFFF;
} else {
CalcEngineReliability(e);
@@ -377,13 +383,6 @@ CommandCost CmdWantEnginePreview(TileIndex tile, uint32 flags, uint32 p1, uint32
return CommandCost();
}
-/* Determine if an engine type is a wagon (and not a loco) */
-static bool IsWagon(EngineID index)
-{
- const Engine *e = GetEngine(index);
- return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
-}
-
StringID GetEngineCategoryName(EngineID engine);
static void NewVehicleAvailable(Engine *e)
diff --git a/src/engine_type.h b/src/engine_type.h
index 66a495607..db923d8b9 100644
--- a/src/engine_type.h
+++ b/src/engine_type.h
@@ -109,7 +109,7 @@ struct EngineInfo {
Date base_intro;
Year lifelength;
Year base_life;
- byte unk2; ///< flag for carriage(bit 7) and decay speed(bits0..6)
+ byte decay_speed;
byte load_amount;
byte climates;
uint32 refit_mask;
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 110182169..aa7496b92 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -417,18 +417,6 @@ static void MapSpriteMappingRecolour(PalSpriteID *grf_sprite)
typedef bool (*VCI_Handler)(uint engine, int numinfo, int prop, byte **buf, int len);
-static void dewagonize(int condition, Engine *e)
-{
- if (condition != 0) {
- e->info.unk2 &= ~0x80;
- if (e->u.rail.railveh_type == RAILVEH_WAGON)
- e->u.rail.railveh_type = RAILVEH_SINGLEHEAD;
- } else {
- e->info.unk2 |= 0x80;
- e->u.rail.railveh_type = RAILVEH_WAGON;
- }
-}
-
static bool RailVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)
{
byte *buf = *bufp;
@@ -468,7 +456,15 @@ static bool RailVehicleChangeInfo(uint engine, int numinfo, int prop, byte **buf
case 0x0B: // Power
rvi->power = grf_load_word(&buf);
- dewagonize(rvi->power, e);
+
+ /* Set engine / wagon state based on power */
+ if (rvi->power != 0) {
+ if (rvi->railveh_type == RAILVEH_WAGON) {
+ rvi->railveh_type = RAILVEH_SINGLEHEAD;
+ }
+ } else {
+ rvi->railveh_type = RAILVEH_WAGON;
+ }
break;
case 0x0D: // Running cost factor
@@ -2300,7 +2296,7 @@ static void FeatureChangeInfo(byte *buf, size_t len)
break;
case 0x02: // Decay speed
- SB(ei->unk2, 0, 7, grf_load_byte(&buf) & 0x7F);
+ ei->decay_speed = grf_load_byte(&buf);
break;
case 0x03: // Vehicle life
diff --git a/src/table/engines.h b/src/table/engines.h
index 3ca03afba..3e8bc3057 100644
--- a/src/table/engines.h
+++ b/src/table/engines.h
@@ -18,7 +18,7 @@ enum {
/** Writes the properties of a train or road vehicle into the EngineInfo struct.
* @see EngineInfo
* @param a Introduction date
- * @param b unk2, flag for carriage(bit 7) and decay speed(bits0..6)
+ * @param b decay speed
* @param c life length
* @param d base life
* @param e Bitmask of the climates
@@ -29,18 +29,18 @@ enum {
/** Writes the properties of a train carriage into the EngineInfo struct.
* @param a Introduction date
- * @param b unk2, flag for carriage(bit 7) and decay speed(bits0..6)
+ * @param b decay speed
* @param c life length
* @param d base life
* @param e Bitmask of the climates
* @see MK
* @note the 5 between d and e is the load amount
*/
-#define MW(a, b, c, d, e) { DAYS_TILL_ORIGINAL_BASE_YEAR + a, c, d, b | 0x80, 5, e, 0, 8, 0, 0, 0, STR_EMPTY }
+#define MW(a, b, c, d, e) { DAYS_TILL_ORIGINAL_BASE_YEAR + a, c, d, b, 5, e, 0, 8, 0, 0, 0, STR_EMPTY }
/** Writes the properties of a ship into the EngineInfo struct.
* @param a Introduction date
- * @param b unk2, flag for carriage(bit 7) and decay speed(bits0..6)
+ * @param b decay speed
* @param c life length
* @param d base life
* @param e Bitmask of the climates
@@ -51,7 +51,7 @@ enum {
/** Writes the properties of an aeroplane into the EngineInfo struct.
* @param a Introduction date
- * @param b unk2, flag for carriage(bit 7) and decay speed(bits0..6)
+ * @param b decay speed
* @param c life length
* @param d base life
* @param e Bitmask of the climates