Method Update

src/linkgraph/linkgraph.cpp:217–244

* Update an edge. If mode contains UM_REFRESH refresh the edge to have at * least the given capacity and usage, otherwise add the capacity, usage and travel time. * In any case set the respective update timestamp(s), according to the given * mode. * @param capacity Capacity to be added/updated. * @param usage Usage to be added. * @param travel_time Travel time to be added, in ticks. * @para

 * @param mode Update mode to be applied.
 */
void LinkGraph::BaseEdge::Update(uint capacity, uint usage, uint32_t travel_time, EdgeUpdateModes modes)
{
	assert(this->capacity > 0);
	assert(capacity >= usage);

	if (modes.Test(EdgeUpdateMode::Increase)) {
		if (this->travel_time_sum == 0) {
			this->travel_time_sum = static_cast<uint64_t>(this->capacity + capacity) * travel_time;
		} else if (travel_time == 0) {
			this->travel_time_sum += this->travel_time_sum / this->capacity * capacity;
		} else {
			this->travel_time_sum += static_cast<uint64_t>(travel_time) * capacity;
		}
		this->capacity += capacity;
		this->usage += usage;
	} else if (modes.Test(EdgeUpdateMode::Refresh)) {
		if (this->travel_time_sum == 0) {
			this->capacity = std::max(this->capacity, capacity);
			this->travel_time_sum = static_cast<uint64_t>(travel_time) * this->capacity;
		} else if (capacity > this->capacity) {
			this->travel_time_sum = this->travel_time_sum / this->capacity * capacity;
			this->capacity = capacity;
		}
		this->usage = std::max(this->usage, usage);
	}
	if (modes.Test(EdgeUpdateMode::Unrestricted)) this->last_unrestricted_update = TimerGameEconomy::date;
	if (modes.Test(EdgeUpdateMode::Restricted)) this->last_restricted_update = TimerGameEconomy::date;
}

/**
 * Resize the component and fill it with empty nodes and edges. Used when