diff options
| -rw-r--r-- | src/newgrf_engine.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp index e1b24de2e..4e72919cb 100644 --- a/src/newgrf_engine.cpp +++ b/src/newgrf_engine.cpp @@ -589,6 +589,25 @@ static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, by return (altitude << 8) | airporttype; } + case 0x45: { // Curvature info + /* Format: xxxTxBxF + * F - previous wagon to current wagon, 0 if vehicle is first + * B - current wagon to next wagon, 0 if wagon is last + * T - previous wagon to next wagon, 0 in an S-bend + */ + if (v->type != VEH_TRAIN) return 0; + + const Vehicle *u_p = GetPrevVehicleInChain(v); + const Vehicle *u_n = v->next; + DirDiff f = (u_p == NULL) ? DIRDIFF_SAME : DirDifference(u_p->direction, v->direction); + DirDiff b = (u_n == NULL) ? DIRDIFF_SAME : DirDifference(v->direction, u_n->direction); + DirDiff t = ChangeDirDiff(f, b); + + return ((t > DIRDIFF_REVERSE ? t | 8 : t) << 16) | + ((b > DIRDIFF_REVERSE ? b | 8 : b) << 8) | + ( f > DIRDIFF_REVERSE ? f | 8 : f); + } + case 0x46: // Motion counter return v->motion_counter; |