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(svn r20477) -Codechange: remove some airport-related constants/functions and add some documentation

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This commit is contained in:
yexo
2010-08-13 00:21:03 +00:00
parent 6babc60254
commit e4117dbfb7
4 changed files with 36 additions and 69 deletions
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91
src/aircraft_cmd.cpp
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@@ -71,14 +71,6 @@ void Aircraft::UpdateDeltaXY(Direction direction)
this->y_extent = GB(x, 24, 8);
}
/**
* this maps the terminal to its corresponding state and block flag
* currently set for 10 terms, 4 helipads
*/
static const byte _airport_terminal_state[] = {2, 3, 4, 5, 6, 7, 19, 20, 0, 0, 8, 9, 21, 22};
static const byte _airport_terminal_flag[] = {0, 1, 2, 3, 4, 5, 22, 23, 0, 0, 6, 7, 24, 25};
static bool AirportMove(Aircraft *v, const AirportFTAClass *apc);
static bool AirportSetBlocks(Aircraft *v, const AirportFTA *current_pos, const AirportFTAClass *apc);
static bool AirportHasBlock(Aircraft *v, const AirportFTA *current_pos, const AirportFTAClass *apc);
@@ -1638,7 +1630,6 @@ static AircraftStateHandler * const _aircraft_state_handlers[] = {
AircraftEventHandler_AtTerminal, // TERM7 = 19
AircraftEventHandler_AtTerminal, // TERM8 = 20
AircraftEventHandler_AtTerminal, // HELIPAD3 = 21
AircraftEventHandler_AtTerminal, // HELIPAD4 = 22
};
static void AirportClearBlock(const Aircraft *v, const AirportFTAClass *apc)
@@ -1780,14 +1771,39 @@ static bool AirportSetBlocks(Aircraft *v, const AirportFTA *current_pos, const A
return true;
}
/**
* Combination of aircraft state for going to a certain terminal and the
* airport flag for that terminal block.
*/
struct MovementTerminalMapping {
AirportMovementStates state; ///< Aircraft movement state when going to this terminal.
uint64 airport_flag; ///< Bitmask in the airport flags that need to be free for this terminal.
};
/** A list of all valid terminals and their associated blocks. */
static const MovementTerminalMapping _airport_terminal_mapping[] = {
{TERM1, TERM1_block},
{TERM2, TERM2_block},
{TERM3, TERM3_block},
{TERM4, TERM4_block},
{TERM5, TERM5_block},
{TERM6, TERM6_block},
{TERM7, TERM7_block},
{TERM8, TERM8_block},
{HELIPAD1, HELIPAD1_block},
{HELIPAD2, HELIPAD2_block},
{HELIPAD3, HELIPAD3_block},
};
static bool FreeTerminal(Aircraft *v, byte i, byte last_terminal)
{
assert(last_terminal <= lengthof(_airport_terminal_mapping));
Station *st = Station::Get(v->targetairport);
for (; i < last_terminal; i++) {
if (!HasBit(st->airport.flags, _airport_terminal_flag[i])) {
if ((st->airport.flags & _airport_terminal_mapping[i].airport_flag) == 0) {
/* TERMINAL# HELIPAD# */
v->state = _airport_terminal_state[i]; // start moving to that terminal/helipad
SetBit(st->airport.flags, _airport_terminal_flag[i]); // occupy terminal/helipad
v->state = _airport_terminal_mapping[i].state; // start moving to that terminal/helipad
SETBITS(st->airport.flags, _airport_terminal_mapping[i].airport_flag); // occupy terminal/helipad
return true;
}
}
@@ -1850,58 +1866,15 @@ static bool AirportFindFreeTerminal(Aircraft *v, const AirportFTAClass *apc)
return FreeTerminal(v, 0, GetNumTerminals(apc));
}
static uint GetNumHelipads(const AirportFTAClass *apc)
{
uint num = 0;
for (uint i = apc->helipads[0]; i > 0; i--) num += apc->helipads[i];
return num;
}
static bool AirportFindFreeHelipad(Aircraft *v, const AirportFTAClass *apc)
{
/* if an airport doesn't have helipads, use terminals */
if (apc->helipads == NULL) return AirportFindFreeTerminal(v, apc);
/* if there are more helicoptergroups, pick one, just as in AirportFindFreeTerminal() */
if (apc->helipads[0] > 1) {
const Station *st = Station::Get(v->targetairport);
const AirportFTA *temp = apc->layout[v->pos].next;
while (temp != NULL) {
if (temp->heading == 255) {
if (!(st->airport.flags & temp->block)) {
/* read which group do we want to go to?
* (the first free group) */
uint target_group = temp->next_position + 1;
/* at what terminal does the group start?
* that means, sum up all terminals of
* groups with lower number */
uint group_start = 0;
for (uint i = 1; i < target_group; i++) {
group_start += apc->helipads[i];
}
uint group_end = group_start + apc->helipads[target_group];
if (FreeTerminal(v, group_start, group_end)) return true;
}
} else {
/* once the heading isn't 255, we've exhausted the possible blocks.
* So we cannot move */
return false;
}
temp = temp->next;
}
} else {
/* only 1 helicoptergroup, check all helipads
* The blocks for helipads start after the last terminal (MAX_TERMINALS) */
return FreeTerminal(v, MAX_TERMINALS, GetNumHelipads(apc) + MAX_TERMINALS);
}
return false; // it shouldn't get here anytime, but just to be sure
assert(apc->helipads[0] == 1);
/* only 1 helicoptergroup, check all helipads
* The blocks for helipads start after the last terminal (MAX_TERMINALS) */
return FreeTerminal(v, MAX_TERMINALS, apc->helipads[1] + MAX_TERMINALS);
}
static bool AircraftEventHandler(Aircraft *v, int loop)