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(svn r11877) -Fix: another way to crash competitors' train in a station

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-Codechange: increase the speed train is approaching line end/semaphore in non-diagonal direction a bit
This commit is contained in:
smatz 2008-01-16 15:48:36 +00:00
parent 9a9a1dcb6c
commit 3ad8b79550
1 changed files with 15 additions and 12 deletions
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27
src/train_cmd.cpp
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@ -2817,14 +2817,16 @@ static void *FindTrainCollideEnum(Vehicle *v, void *data)
/* get first vehicle now to make most usual checks faster */ /* get first vehicle now to make most usual checks faster */
Vehicle *coll = v->First(); Vehicle *coll = v->First();
/* can't collide with own wagons && can't crash in depot && not too far */ /* can't collide with own wagons && can't crash in depot && the same height level */
if (coll != tcc->v && v->u.rail.track != TRACK_BIT_DEPOT && if (coll != tcc->v && v->u.rail.track != TRACK_BIT_DEPOT && abs(v->z_pos - tcc->v->z_pos) < 6) {
abs(v->z_pos - tcc->v->z_pos) < 6 && int x_diff = v->x_pos - tcc->v->x_pos;
abs(v->x_pos - tcc->v->x_pos) < 6 && int y_diff = v->y_pos - tcc->v->y_pos;
abs(v->y_pos - tcc->v->y_pos) < 6 ) {
/* needed to disable possible crash of competitor train in station by building diagonal track at its end */
if (x_diff * x_diff + y_diff * y_diff > 25) return NULL;
/* two drivers + passengers killed in train tcc->v (if it was not crashed already) */
if (!(tcc->v->vehstatus & VS_CRASHED)) { if (!(tcc->v->vehstatus & VS_CRASHED)) {
/* two drivers + passengers killed in train tcc->v (if it was not crashed already) */
tcc->num += 2 + CountPassengersInTrain(tcc->v); tcc->num += 2 + CountPassengersInTrain(tcc->v);
SetVehicleCrashed(tcc->v); SetVehicleCrashed(tcc->v);
} }
@ -3246,7 +3248,7 @@ static void HandleBrokenTrain(Vehicle *v)
} }
/** Maximum speeds for train that is broken down or approaching line end */ /** Maximum speeds for train that is broken down or approaching line end */
static const byte _breakdown_speeds[16] = { static const uint16 _breakdown_speeds[16] = {
225, 210, 195, 180, 165, 150, 135, 120, 105, 90, 75, 60, 45, 30, 15, 15 225, 210, 195, 180, 165, 150, 135, 120, 105, 90, 75, 60, 45, 30, 15, 15
}; };
@ -3264,14 +3266,16 @@ static bool TrainApproachingLineEnd(Vehicle *v, bool signal)
uint x = v->x_pos & 0xF; uint x = v->x_pos & 0xF;
uint y = v->y_pos & 0xF; uint y = v->y_pos & 0xF;
/* for diagonal directions, 'x' will be 0..15 -
* for other directions, it will be 1, 3, 5, ..., 15 */
switch (v->direction) { switch (v->direction) {
case DIR_N : x = ~x + ~y + 24; break; case DIR_N : x = ~x + ~y + 25; break;
case DIR_NW: x = y; /* FALLTHROUGH */ case DIR_NW: x = y; /* FALLTHROUGH */
case DIR_NE: x = ~x + 16; break; case DIR_NE: x = ~x + 16; break;
case DIR_E : x = ~x + y + 8; break; case DIR_E : x = ~x + y + 9; break;
case DIR_SE: x = y; break; case DIR_SE: x = y; break;
case DIR_S : x = x + y - 8; break; case DIR_S : x = x + y - 7; break;
case DIR_W : x = ~y + x + 8; break; case DIR_W : x = ~y + x + 9; break;
default: break; default: break;
} }
@ -3286,7 +3290,6 @@ static bool TrainApproachingLineEnd(Vehicle *v, bool signal)
/* slow down */ /* slow down */
v->vehstatus |= VS_TRAIN_SLOWING; v->vehstatus |= VS_TRAIN_SLOWING;
uint16 break_speed = _breakdown_speeds[x & 0xF]; uint16 break_speed = _breakdown_speeds[x & 0xF];
if (!(v->direction & 1)) break_speed >>= 1;
if (break_speed < v->cur_speed) v->cur_speed = break_speed; if (break_speed < v->cur_speed) v->cur_speed = break_speed;
return true; return true;