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(svn r3789) Add an enum and function to handle DiagDirection changes

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This commit is contained in:
tron 2006-03-08 08:51:26 +00:00
parent af69dba514
commit e68120034c
2 changed files with 32 additions and 14 deletions
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13
direction.h
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@ -65,6 +65,19 @@ static inline DiagDirection ReverseDiagDir(DiagDirection d)
}
typedef enum DiagDirDiff {
DIAGDIRDIFF_SAME = 0,
DIAGDIRDIFF_90RIGHT = 1,
DIAGDIRDIFF_REVERSE = 2,
DIAGDIRDIFF_90LEFT = 3
} DiagDirDiff;
static inline DiagDirection ChangeDiagDir(DiagDirection d, DiagDirDiff delta)
{
return (DiagDirection)((d + delta) % 4);
}
static inline DiagDirection DirToDiagDir(Direction dir)
{
return (DiagDirection)(dir >> 1);

33
train_cmd.c
View File

@ -1546,14 +1546,14 @@ static void ReverseTrainDirection(Vehicle *v)
/* Check if we were approaching a rail/road-crossing */
{
TileIndex tile = v->tile;
int t;
DiagDirection dir = DirToDiagDir(v->direction);
/* Determine the 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;
if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[dir]) {
dir = ChangeDiagDir(dir, DIAGDIRDIFF_90LEFT);
}
/* Calculate next tile */
tile += TileOffsByDir(t);
tile += TileOffsByDir(dir);
/* Check if the train left a rail/road-crossing */
DisableTrainCrossing(tile);
@ -1785,13 +1785,17 @@ static TrainFindDepotData FindClosestTrainDepot(Vehicle *v)
DiagDirection i;
i = DirToDiagDir(v->direction);
if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) i = (i + 3) & 3;
if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) {
i = ChangeDiagDir(i, DIAGDIRDIFF_90LEFT);
}
NewTrainPathfind(tile, 0, i, (NTPEnumProc*)NtpCallbFindDepot, &tfdd);
if (tfdd.best_length == (uint)-1){
tfdd.reverse = true;
// search in backwards direction
i = ReverseDiagDir(DirToDiagDir(v->direction));
if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) i = (i + 3) & 3;
if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[i]) {
i = ChangeDiagDir(i, DIAGDIRDIFF_90LEFT);
}
NewTrainPathfind(tile, 0, i, (NTPEnumProc*)NtpCallbFindDepot, &tfdd);
}
}
@ -3107,7 +3111,8 @@ static bool TrainCheckIfLineEnds(Vehicle *v)
TileIndex tile;
uint x,y;
uint16 break_speed;
DiagDirection t;
DiagDirection dir;
int t;
uint32 ts;
t = v->breakdown_ctr;
@ -3138,14 +3143,14 @@ static bool TrainCheckIfLineEnds(Vehicle *v)
return true;*/
/* 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;
dir = DirToDiagDir(v->direction);
if (!(v->direction & 1) && v->u.rail.track != _state_dir_table[dir]) {
dir = ChangeDiagDir(dir, DIAGDIRDIFF_90LEFT);
}
/* Calculate next tile */
tile += TileOffsByDir(t);
tile += TileOffsByDir(dir);
// determine the track status on the next tile.
ts = GetTileTrackStatus(tile, TRANSPORT_RAIL) & _reachable_tracks[t];
ts = GetTileTrackStatus(tile, TRANSPORT_RAIL) & _reachable_tracks[dir];
/* Calc position within the current tile ?? */
x = v->x_pos & 0xF;
@ -3166,7 +3171,7 @@ static bool TrainCheckIfLineEnds(Vehicle *v)
if (x + 4 > 15 &&
(!CheckCompatibleRail(v, tile) ||
(IsTileDepotType(tile, TRANSPORT_RAIL) &&
GetDepotDirection(tile, TRANSPORT_RAIL) == t))) {
GetDepotDirection(tile, TRANSPORT_RAIL) == dir))) {
v->cur_speed = 0;
ReverseTrainDirection(v);
return false;