void Game_Map::UpdatePan() {
if (!IsPanActive())
return;
const int step = location.pan_speed;
const int pan_remain_x = location.pan_current_x - location.pan_finish_x;
const int pan_remain_y = location.pan_current_y - location.pan_finish_y;
int dx = std::min(step, std::abs(pan_remain_x));
dx = pan_remain_x >= 0 ? dx : -dx;
int dy = std::min(step, std::abs(pan_remain_y));
dy = pan_remain_y >= 0 ? dy : -dy;
int screen_x = Game_Map::GetPositionX();
int screen_y = Game_Map::GetPositionY();
Game_Map::AddScreenX(screen_x, dx);
Game_Map::AddScreenY(screen_y, dy);
// If we hit the edge of the map before pan finishes, the
// pan converts from waiting to non-waiting.
if (dx == 0 && dy == 0) {
pan_wait = false;
return;
}
Game_Map::ScrollRight(dx);
Game_Map::ScrollDown(dy);
location.pan_current_x -= dx;
location.pan_current_y -= dy;
}
void Game_Map::UpdatePan() {
if (!IsPanActive())
return;
int step = 2 << (pan_speed - 1);
int dx = location.pan_finish_x - location.pan_current_x;
int dy = location.pan_finish_y - location.pan_current_y;
if (dx > 0)
location.pan_current_x += std::min(step, dx);
else if (dx < 0)
location.pan_current_x -= std::min(step, -dx);
if (dy > 0)
location.pan_current_y += std::min(step, dy);
else if (dy < 0)
location.pan_current_y -= std::min(step, -dy);
}
bool Game_Map::IsPanWaiting() {
return IsPanActive() && pan_wait;
}
