C++ unit::vision方法代码示例

/**
 * Constructor from a unit.
 */
clearer_info::clearer_info(const unit & viewer) :
	underlying_id(viewer.underlying_id()),
	sight_range(viewer.vision()),
	slowed(viewer.get_state(unit::STATE_SLOWED)),
	costs(viewer.movement_type().get_vision())
{
}

/**
 * Constructs a list of vision paths for a unit.
 *
 * This is used to construct a list of hexes that the indicated unit can see.
 * It differs from pathfinding in that it will only ever go out one turn,
 * and that it will also collect a set of border hexes (the "one hex beyond"
 * movement to which vision extends).
 * @param viewer     The unit doing the viewing.
 * @param loc        The location from which the viewing occurs
 *                   (does not have to be the unit's location).
 */
vision_path::vision_path(const unit& viewer, map_location const &loc,
                         const std::map<map_location, int>& jamming_map)
	: paths(), edges()
{
	const int sight_range = viewer.vision();

	// The four NULL parameters indicate (in order): no teleports,
	// ignore units, ignore ZoC (no effect), and see all (no effect).
	find_routes(loc, viewer.movement_type().get_vision(),
	            viewer.get_state(unit::STATE_SLOWED), sight_range, sight_range,
	            0, destinations, &edges, NULL, NULL, NULL, NULL, &jamming_map);
}

/**
 * Clears shroud (and fog) around the provided location for @a view_team
 * as if @a viewer was standing there.
 * This will also record sighted events, which should be either fired or
 * explicitly dropped.
 *
 * This should only be called if delayed shroud updates is off.
 * It is wasteful to call this if view_team uses neither fog nor shroud.
 *
 * @param known_units      These locations are not checked for uncovered units.
 * @param enemy_count      Incremented for each enemy uncovered (excluding known_units).
 * @param friend_count     Incremented for each friend uncovered (excluding known_units).
 * @param spectator        Will be told of uncovered units (excluding known_units).
 * @param instant          If false, then drawing delays (used to make movement look better) are allowed.
 *
 * @return whether or not information was uncovered (i.e. returns true if any
 *         locations in visual range were fogged/shrouded under shared vision/maps).
 */
bool shroud_clearer::clear_unit(const map_location &view_loc,
                                const unit &viewer, team &view_team,
                                const std::set<map_location>* known_units,
                                std::size_t * enemy_count, std::size_t * friend_count,
                                move_unit_spectator * spectator, bool instant)
{
	// This is just a translation to the more general interface. It is
	// not inlined so that vision.hpp does not have to include unit.hpp.
	return clear_unit(view_loc, view_team, viewer.underlying_id(),
	                  viewer.vision(), viewer.get_state(unit::STATE_SLOWED),
	                  viewer.movement_type().get_vision(), viewer.get_location(),
	                  known_units, enemy_count, friend_count, spectator, instant);
}