Method UpdateFacing

src/game_character.cpp:1213–1234

}

void Game_Character::UpdateFacing() {
	// RPG_RT only does the IsSpinning() check for Game_Event. We did it for all types here
	// in order to avoid a virtual call and because normally with RPG_RT, spinning
	// player or vehicle is impossible.
	if (IsFacingLocked() || IsSpinning()) {
		return;
	}
	const auto dir = GetDirection();
	const auto facing = GetFacing();
	if (dir >= 4) /* is diagonal */ {
		// [UR, DR, DL, UL] -> [U, D, D, U]
		const auto f1 = ((dir + (dir >= 6)) % 2) * 2;
		// [UR, DR, DL, UL] -> [R, R, L, L]
		const auto f2 = (dir / 2) - (dir < 6);
		if (facing != f1 && facing != f2) {
			// Reverse the direction.
			SetFacing((facing + 2) % 4);
		}
	} else {
		SetFacing(dir);
	}
}