bool Game_Character::MakeWay(int x, int y, int d) const {
if (d > 3) {
int dx = (d == UpRight || d == DownRight) - (d == DownLeft || d == UpLeft);
int dy = (d == DownRight || d == DownLeft) - (d == UpRight || d == UpLeft);
return ((MakeWay(x, y, dy + 1) && MakeWay(x, y + dy, -dx + 2)) ||
(MakeWay(x, y, -dx + 2) && MakeWay(x + dx, y, dy + 1)));
}
return Game_Map::MakeWay(x, y, d, *this);
}
void Game_Character::Move(int dir) {
int dx = (dir == Right || dir == UpRight || dir == DownRight) - (dir == Left || dir == DownLeft || dir == UpLeft);
int dy = (dir == Down || dir == DownRight || dir == DownLeft) - (dir == Up || dir == UpRight || dir == UpLeft);
SetDirection(dir);
if (!(IsDirectionFixed() || IsFacingLocked() || IsSpinning())) {
if (dir > 3) // Diagonal
SetSpriteDirection(GetSpriteDirection() % 2 ? -dx + 2 : dy + 1);
else
SetSpriteDirection(dir);
}
if (jumping) {
jump_plus_x += dx;
jump_plus_y += dy;
return;
}
move_failed = !MakeWay(GetX(), GetY(), dir);
if (move_failed) {
if (!CheckEventTriggerTouch(Game_Map::RoundX(GetX() + dx), Game_Map::RoundY(GetY() + dy)))
return;
} else {
SetX(Game_Map::RoundX(GetX() + dx));
SetY(Game_Map::RoundY(GetY() + dy));
remaining_step = SCREEN_TILE_WIDTH;
BeginMove();
}
stop_count = 0;
max_stop_count = (GetMoveFrequency() > 7) ? 0 : pow(2.0, 9 - GetMoveFrequency());
}
bool Game_Map::MakeWay(const Game_Character& self, int x, int y) {
// Moving to same tile (used for jumps) always succeeds
if (x == self.GetX() && y == self.GetY()) {
return true;
}
if (!self.IsJumping() && x != self.GetX() && y != self.GetY()) {
// Handle diagonal stepping.
// Must be able to step on at least one of the 2 adjacent tiles and also the target tile.
// Verified behavior: Always checks vertical first, only checks horizontal if vertical fails.
bool vertical_ok = MakeWay(self, self.GetX(), y);
if (!vertical_ok) {
bool horizontal_ok = MakeWay(self, x, self.GetY());
if (!horizontal_ok) {
return false;
}
}
}
// Infer directions before we do any rounding.
const auto bit_from = GetPassableMask(self.GetX(), self.GetY(), x, y);
const auto bit_to = GetPassableMask(x, y, self.GetX(), self.GetY());
// Now round for looping maps.
x = Game_Map::RoundX(x);
y = Game_Map::RoundY(y);
// Note, even for diagonal, if the tile is invalid we still check vertical/horizontal first!
if (!Game_Map::IsValid(x, y)) {
return false;
}
if (self.GetThrough()) {
return true;
}
const auto vehicle_type = static_cast<Game_Vehicle::Type>(self.GetVehicleType());
bool self_conflict = false;
if (!self.IsJumping()) {
// Check for self conflict.
// If this event has a tile graphic and the tile itself has passage blocked in the direction
// we want to move, flag it as "self conflicting" for use later.
if (self.GetLayer() == RPG::EventPage::Layers_below && self.GetTileId() != 0) {
int tile_id = self.GetTileId();
if ((passages_up[tile_id] & bit_from) == 0) {
self_conflict = true;
}
}
if (vehicle_type == Game_Vehicle::None) {
// Check that we are allowed to step off of the current tile.
// Note: Vehicles can always step off a tile.
if (!IsPassableTile(&self, bit_from, self.GetX(), self.GetY())) {
return false;
}
}
}
if (vehicle_type != Game_Vehicle::Airship) {
// Check for collision with events on the target tile.
for (auto& other: GetEvents()) {
if (MakeWayCollideEvent(x, y, self, other, self_conflict)) {
return false;
}
}
auto& player = Main_Data::game_player;
if (player->GetVehicleType() == Game_Vehicle::None) {
if (MakeWayCollideEvent(x, y, self, *Main_Data::game_player, self_conflict)) {
return false;
}
}
for (auto vid: { Game_Vehicle::Boat, Game_Vehicle::Ship}) {
auto& other = vehicles[vid - 1];
if (other->IsInCurrentMap()) {
if (MakeWayCollideEvent(x, y, self, *other, self_conflict)) {
return false;
}
}
}
auto& airship = vehicles[Game_Vehicle::Airship - 1];
if (airship->IsInCurrentMap() && self.GetType() != Game_Character::Player) {
if (MakeWayCollideEvent(x, y, self, *airship, self_conflict)) {
return false;
}
}
}
int bit = bit_to;
if (self.IsJumping()) {
bit = Passable::Down | Passable::Up | Passable::Left | Passable::Right;
}
return IsPassableTile(&self, bit, x, y);
}