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(svn r10111) -Codechange: Add new vehicle hash table for collision detection and finding vehicles on a tile. The hash area scanned is far smaller than the old hash table, which is now used for viewport updates only. This should give a significant performance improvement for games with many vehicles. (Based on work by 'B. N. SmatZ!' and 'madman2003')

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This commit is contained in:
peter1138
2007-06-12 11:22:32 +00:00
parent 105c7455ae
commit 78d797a6b7
4 changed files with 119 additions and 32 deletions
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22
src/train_cmd.cpp
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@@ -2722,7 +2722,7 @@ static void CheckTrainCollision(Vehicle *v)
tcc.v_skip = v->next;
/* find colliding vehicle */
Vehicle *realcoll = (Vehicle*)VehicleFromPos(TileVirtXY(v->x_pos, v->y_pos), &tcc, FindTrainCollideEnum);
Vehicle *realcoll = (Vehicle*)VehicleFromPosXY(v->x_pos, v->y_pos, &tcc, FindTrainCollideEnum);
if (realcoll == NULL) return;
Vehicle *coll = GetFirstVehicleInChain(realcoll);
@@ -2775,6 +2775,8 @@ static void TrainController(Vehicle *v, bool update_image)
/* For every vehicle after and including the given vehicle */
for (prev = GetPrevVehicleInChain(v); v != NULL; prev = v, v = v->next) {
DiagDirection enterdir = DIAGDIR_BEGIN;
bool update_signals = false;
BeginVehicleMove(v);
GetNewVehiclePosResult gp = GetNewVehiclePos(v);
@@ -2810,7 +2812,7 @@ static void TrainController(Vehicle *v, bool update_image)
/* Determine what direction we're entering the new tile from */
Direction dir = GetNewVehicleDirectionByTile(gp.new_tile, gp.old_tile);
DiagDirection enterdir = DirToDiagDir(dir);
enterdir = DirToDiagDir(dir);
assert(IsValidDiagDirection(enterdir));
/* Get the status of the tracks in the new tile and mask
@@ -2917,11 +2919,9 @@ static void TrainController(Vehicle *v, bool update_image)
assert(v->u.rail.track);
}
if (IsFrontEngine(v)) TrainMovedChangeSignals(gp.new_tile, enterdir);
/* Signals can only change when the first
* (above) or the last vehicle moves. */
if (v->next == NULL) TrainMovedChangeSignals(gp.old_tile, ReverseDiagDir(enterdir));
/* We need to update signal status, but after the vehicle position hash
* has been updated by AfterSetTrainPos() */
update_signals = true;
if (prev == NULL) AffectSpeedByDirChange(v, chosen_dir);
@@ -2958,6 +2958,14 @@ static void TrainController(Vehicle *v, bool update_image)
/* This is the first vehicle in the train */
AffectSpeedByZChange(v, old_z);
}
if (update_signals) {
if (IsFrontEngine(v)) TrainMovedChangeSignals(gp.new_tile, enterdir);
/* Signals can only change when the first
* (above) or the last vehicle moves. */
if (v->next == NULL) TrainMovedChangeSignals(gp.old_tile, ReverseDiagDir(enterdir));
}
}
return;