Method build_graph

pipeline/pipeline_builder.cpp:200–259

}

void PipelineBuilder::build_graph(
		const Vector<StringName> &p_system_bundles,
		const Vector<StringName> &p_systems,
		ExecutionGraph *r_graph,
		bool p_skip_warnings) {
	CRASH_COND_MSG(r_graph == nullptr, "The pipeline pointer must be valid.");

	r_graph->valid = false;
	r_graph->error_msg = "";
	r_graph->warnings.clear();
	r_graph->systems.clear();
	r_graph->dispatchers.clear();
	r_graph->systems_dispatcher.clear();

	// Crate the main dispatcher.
	Ref<ExecutionGraph::Dispatcher> main;
	main.instantiate();
	r_graph->dispatchers.insert("main", main);

	// Initialize the system, by fetching the various dependencies.
	r_graph->systems.resize(ECS::get_systems_count());

	fetch_bundle_info(p_system_bundles, r_graph);
	for (int i = 0; i < p_systems.size(); i += 1) {
		fetch_system_info(p_systems[i], StringName(), -1, LocalVector<SystemDependency>(), r_graph);
	}

	String error;
	const bool sort_failed = !sort_systems(r_graph, error);

	// Check if we have a cynclic dependency.
	if (sort_failed || has_cyclick_dependencies(r_graph, error)) {
		r_graph->print_sorted_systems();
		r_graph->print_stages();

		r_graph->systems_dispatcher.clear();
		r_graph->dispatchers.clear();
		r_graph->systems.clear();
		r_graph->valid = false;
		r_graph->error_msg = error;
		r_graph->error_msg += TTR(" Pipeline building is aborted.");

		ERR_FAIL_MSG("[FATAL] " + r_graph->error_msg + " Check the pipeline above ---^");
		return;
	}

	// The validation phase
	if (!p_skip_warnings) {
		detect_warnings_sub_dispatchers_missing(r_graph);
		detect_warnings_lost_events(r_graph);
	}

	// Everything is fine, build the graph and optimize it.
	build_stages(r_graph);
	optimize_stages(r_graph);

	r_graph->valid = true;