cpp/openttd-patchpack/source Changeset - r22:d13b1ad89539

Changeset - r22:d13b1ad89539

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darkvater - 20 years ago 2004-08-11 22:07:08
darkvater@openttd.org

(svn r23) -Some omments on the code (blathijs)

11 files changed with 67 insertions and 8 deletions:

macros.h

pathfind.c

rail_cmd.c

road_cmd.c

station_cmd.c

train_cmd.c

train_gui.c

ttd.h

tunnelbridge_cmd.c

vehicle.c

vehicle.h

0 comments (0 inline, 0 general)

macros.h

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@@ @@ -130,7 +130,14 @@ extern uint SafeTileAdd(uint x, int add, @@
 #define SPRITE_PALETTE(x) ((x) + 0x8000)
 extern const byte _ffb_64[128];
 /* Returns the position of the first bit that is not zero, counted from the
  * left. Ie, 10110100 returns 2, 00000001 returns 0, etc. When x == 0 returns
  * 0.
  */
 #define FIND_FIRST_BIT(x) _ffb_64[(x)]
 /* Returns x with the first bit that is not zero, counted from the left, set
  * to zero. So, 10110100 returns 10110000, 00000001 returns 00000000, etc.
  */
 #define KILL_FIRST_BIT(x) _ffb_64[(x)+64]
 static INLINE int FindFirstBit2x64(int value)
@@ @@ -212,4 +219,6 @@ static INLINE void WRITE_LE_UINT16(const @@
 	((byte*)b)[1] = (byte)(x >> 8);
+}
 #define MAX_DETOUR 6
 #endif /* MACROS_H */

pathfind.c

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@@ @@ -187,6 +187,9 @@ continue_here:; @@
 static const int8 _get_tunlen_inc[5] = { -16, 0, 16, 0, -16 };
 /* Returns the end tile and the length of a tunnel. The length does not
  * include the starting tile (entry), it does include the end tile (exit).
  */
 FindLengthOfTunnelResult FindLengthOfTunnel(uint tile, int direction, byte type)
+{
 	FindLengthOfTunnelResult flotr;

rail_cmd.c

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@@ @@ -8,7 +8,7 @@ @@
 void ShowTrainDepotWindow(uint tile);
 enum {
+enum { /* These values are bitmasks for the map5 byte */
 	RAIL_TYPE_NORMAL = 0,
 	RAIL_TYPE_SIGNALS = 0x40,
 	RAIL_TYPE_SPECIAL = 0x80, // If this bit is set, then it's not a regular track.
@@ @@ -40,6 +40,9 @@ enum { @@
  * 01 abcdef  => Rail with signals
  * 10 ??????  => Unused
  * 11 ????dd  => Depot
+ *
  * abcdef is a bitmask, which contains ones for all present tracks. Below the
  * value for each track is given.
  */
 /*         4
@@ @@ -77,8 +80,12 @@ enum RailMap2Lower4 { @@
 };
 /* MAP2 byte:    abcd???? => Signal On?
+/* MAP2 byte:    abcd???? => Signal On? Same coding as map3lo
  * MAP3LO byte:  abcd???? => Signal Exists?
  *				 a and b are for diagonals, upper and left,
  *				 one for each direction. (ie a == NE->SW, b ==
  *				 SW->NE, or v.v., I don't know. b and c are
  *				 similar for lower and right.
  * MAP2 byte:    ????abcd => Type of ground.
  * MAP3LO byte:  ????abcd => Type of rail.
  * MAP5:         00abcdef => rail
@@ @@ -1796,6 +1803,7 @@ static uint32 GetTileTrackStatus_Track(u @@
 		ret = (m5 | (m5 << 8)) & 0x3F3F;
 		if (!(m5 & RAIL_TYPE_SIGNALS)) {
 			if ( (ret & 0xFF) == 3)
 			/* Diagonal crossing? */
 				ret |= 0x40;
 		} else {
 			/* has_signals */
@@ @@ -1805,6 +1813,10 @@ static uint32 GetTileTrackStatus_Track(u @@
 			b &= a;
 			/* When signals are not present (in neither
 			 * direction), we pretend them to be green. (So if
 			 * signals are only one way, the other way will
 			 * implicitely become `red' */
 			if ((a & 0xC0) == 0) { b |= 0xC0; }
 			if ((a & 0x30) == 0) { b |= 0x30; }

road_cmd.c

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@@ @@ -7,6 +7,10 @@ @@
 #include "town.h"
 #include "gfx.h"
 /* When true, GetTrackStatus for roads will treat roads under reconstruction
  * as normal roads instead of impassable. This is used when detecting whether
  * a road can be removed. This is of course ugly, but I don't know a better
  * solution just like that... */
 static bool _road_special_gettrackstatus;
 void RoadVehEnterDepot(Vehicle *v);

station_cmd.c

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@@ @@ -2232,8 +2232,8 @@ uint MoveGoodsToStation(uint tile, int w @@
 							st->blocked_months == 0 &&
 							st->goods[type].rating != 0 &&
 							(!_patches.selectgoods || st->goods[type].last_speed) && // if last_speed is 0, no vehicle has been there.
 							((st->facilities & (byte)~FACIL_BUS_STOP)!=0 || type==CT_PASSENGERS) &&
 							((st->facilities & (byte)~FACIL_TRUCK_STOP)!=0 || type!=CT_PASSENGERS)) {
 							((st->facilities & (byte)~FACIL_BUS_STOP)!=0 || type==CT_PASSENGERS) && // if we have other fac. than a bus stop, or the cargo is passengers
 							((st->facilities & (byte)~FACIL_TRUCK_STOP)!=0 || type!=CT_PASSENGERS)) { // if we have other fac. than a cargo bay or the cargo is not passengers
 						around[i] = st_index;
 						around_ptr[i] = st;

train_cmd.c

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@@ @@ -1921,6 +1921,12 @@ static int CountPassengersInTrain(Vehicl @@
 	return num;
+}
 /*
  * Checks whether the specified tried has a collision with another vehicle. If
  * so, destroys this vehicle, and the other vehicle if its subtype is 0 (?).
  * Reports the incident in a flashy news item, modifies station ratings and
  * plays a sound.
  */
 static void CheckTrainCollision(Vehicle *v)
+{
 	TrainCollideChecker tcc;
@@ @@ -1991,12 +1997,14 @@ static void TrainController(Vehicle *v) @@
 	byte chosen_track;
 	byte old_z;
 	/* For every vehicle after and including the given vehicle */
 	for(;;) {
 		BeginVehicleMove(v);
 		if (v->u.rail.track != 0x40) {
 			/* Not inside tunnel */
 			if (GetNewVehiclePos(v, &gp)) {
-				/* Statying in the old tile */
+				/* Staying in the old tile */
 				if (v->u.rail.track == 0x80) {
 					/* inside depot */
 					gp.x = v->x_pos;
@@ @@ -2079,6 +2087,8 @@ static void TrainController(Vehicle *v) @@
 				if (v->subtype == 0)
 					TrainMovedChangeSignals(gp.new_tile, dir>>1);
 				/* Signals can only change when the first
 				 * (above) or the last vehicle moves. */
 				if (v->next == NULL)
 					TrainMovedChangeSignals(gp.old_tile, (dir>>1) ^ 2);
@@ @@ -2117,24 +2127,27 @@ common:; @@
 		old_z = AfterSetTrainPos(v);
 		if (prev == NULL) {
 			/* This is the first vehicle in the train */
 			AffectSpeedByZChange(v, old_z);
 			CheckTrainCollision(v);
+		}
 next_vehicle:;
 		/* continue with next vehicle */
 next_vehicle:;
 		prev = v;
 		if ((v=v->next) == NULL)
 			return;
+	}
 invalid_rail:
 	/* We've reached end of line?? */
 	if (prev != NULL) {
 		error("!Disconnecting train");
+	}
 	goto reverse_train_direction;
 red_light: {
 	/* We're in front of a red signal ?? */
 		/* find the first set bit in ts. need to do it in 2 steps, since
 		 * FIND_FIRST_BIT only handles 6 bits at a time. */
 		i = FindFirstBit2x64(ts);
@@ @@ -2307,14 +2320,17 @@ static void TrainCheckIfLineEnds(Vehicle @@
 	if (IS_TILETYPE(tile, MP_RAILWAY) && (_map5[tile] & 0xFC) == 0xC0)
 		return;
-	// determine the tracks on the next tile.
+	/* Determine the non-diagonal direction in which we will exit this tile */
 	t = v->direction >> 1;
 	if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[t]) {
 		t = (t - 1) & 3;
+	}
 	/* Calculate next tile */
 	tile += _tileoffs_by_dir[t];
 	// determine the track status on the next tile.
 	ts = GetTileTrackStatus(tile, 0) & _reachable_tracks[t];
 	/* Calc position within the current tile ?? */
 	x = v->x_pos & 0xF;
 	y = v->y_pos & 0xF;

train_gui.c

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@@ @@ -316,8 +316,10 @@ static void DrawTrainDepotWindow(Window @@
 				--num < 0 && num >= -6) {
 			DrawTrainImage(v, x+21, y, 10, w->hscroll.pos, WP(w,traindepot_d).sel);
 			/* Draw the train number */
 			SET_DPARAM16(0, v->unitnumber);
 			DrawString(x, y, (v->max_age - 366 < v->age) ? STR_00E3 : STR_00E2, 0);
 			/* Draw the pretty flag */
 			DrawSprite(v->vehstatus&VS_STOPPED ? 0xC12 : 0xC13, x+15, y);
 			y += 14;

ttd.h

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@@ @@ -236,6 +236,10 @@ typedef void ClickTileProc(uint tile); @@
 typedef void AnimateTileProc(uint tile);
 typedef void TileLoopProc(uint tile);
 typedef void ChangeTileOwnerProc(uint tile, byte old_player, byte new_player);
 /* Return value has bit 0x2 set, when the vehicle enters a station. Then,
  * result << 8 contains the id of the station entered. If the return value has
  * bit 0x8 set, the vehicle could not and did not enter the tile. Are there
  * other bits that can be set? */
 typedef uint32 VehicleEnterTileProc(Vehicle *v, uint tile, int x, int y);
 typedef void VehicleLeaveTileProc(Vehicle *v, uint tile, int x, int y);

tunnelbridge_cmd.c

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@@ @@ -1388,6 +1388,7 @@ static uint32 VehicleEnter_TunnelBridge( @@
+			}
 			if (dir == (vdir^2) && fc == _tunnel_fractcoord_3[dir] && z == 0) {
 				/* We're at the tunnel exit ?? */
 				v->tile = tile;
 				v->u.rail.track = _exit_tunnel_track[dir];
 				v->vehstatus &= ~VS_HIDDEN;
@@ @@ -1413,6 +1414,7 @@ static uint32 VehicleEnter_TunnelBridge( @@
+			}
 			if (dir == (vdir^2) && (
 				/* We're at the tunnel exit ?? */
 					fc == _tunnel_fractcoord_6[dir] ||
 					fc == _tunnel_fractcoord_7[dir]) &&
 					z == 0) {

vehicle.c

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@@ @@ -1458,11 +1458,18 @@ byte GetDirectionTowards(Vehicle *v, int @@
 	return (dir+((dirdiff&7)<5?1:-1)) & 7;
+}
 /* Return value has bit 0x2 set, when the vehicle enters a station. Then,
  * result << 8 contains the id of the station entered. If the return value has
  * bit 0x8 set, the vehicle could not and did not enter the tile. Are there
  * other bits that can be set? */
 uint32 VehicleEnterTile(Vehicle *v, uint tile, int x, int y)
+{
 	uint old_tile = v->tile;
 	uint32 result = _tile_type_procs[GET_TILETYPE(tile)]->vehicle_enter_tile_proc(v, tile, x, y);
 	/* When vehicle_enter_tile_proc returns 8, that apparently means that
 	 * we cannot enter the tile at all. In that case, don't call
 	 * leave_tile. */
 	if (!(result & 8) && old_tile != tile) {
 		VehicleLeaveTileProc *proc = _tile_type_procs[GET_TILETYPE(old_tile)]->vehicle_leave_tile_proc;
 		if (proc != NULL)

vehicle.h

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@@ @@ -85,7 +85,7 @@ struct WorldSprite { @@
 struct Vehicle {
 	byte type;				// type, ie roadven,train,ship,aircraft,special
 	byte subtype;			// subtype
+	byte subtype;			// subtype (for trains, 0 == loco, 4 wagon ??)
 	uint16 index;			// NOSAVE: Index in vehicle array
 	uint16 next_in_chain_old; // Next vehicle index for chained vehicles

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