two direction connections with blockers working

src/button.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "raylib.h"
+#include "raymath.h"
+
+inline bool ViButton(float x, float y, float radius, Color color){
+	Vector2 mp = GetMousePosition();
+	DrawCircle(x,y,radius, color);
+	return (Vector2Distance(mp, (Vector2){x,y}) < radius && IsMouseButtonPressed(MOUSE_BUTTON_LEFT));
+}

src/connection-manager.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include "connection.h"
+#include <map>
+
+class ConnectionManager{
+
+	public:
+
+		ConnectionManager() {}
+
+		std::vector<Connection> connections;
+
+		std::map<Node*, int> counter;
+
+		Node* next(Node* current){
+			std::vector<Connection*> paths;
+
+			for(auto& p : connections){
+				if((p.v1 == current && p.v1_v2) || (p.v2 == current && p.v2_v1)) {
+					p.active = false;
+					paths.push_back(&p);
+				}
+			}
+
+			if(paths.empty()) return nullptr;
+			
+			int return_path = 0;
+			if(counter.find(current) == counter.end()) {
+				counter[current] = 0;
+			} else {
+				counter[current] = (counter[current] + 1) % paths.size();
+				return_path = counter[current];
+			}
+			paths[return_path]->active = true;	
+			return paths[return_path]->v1 == current ? paths[return_path]->v2 : paths[return_path]->v1;
+		}
+
+		void draw(){
+			for(auto& c : connections){
+				c.draw();
+			}
+		}
+};

src/connection.h

@@ -1,17 +1,33 @@
 #pragma once
 
+#include "button.h"
 #include "node.h"
 
 class Connection{
 
 	public:
 		Connection() {}
-		Connection(Node* from, Node* to) : from(from), to(to) {}
+		Connection(Node* v1, Node* v2) : v1(v1), v2(v2) {}
 
-		Node* from;
-		Node* to;
+		Node* v1;
+		Node* v2;
+
+		bool v1_v2 = true;
+		bool v2_v1 = true;
+		bool active = false;
 
 		void draw(){
+			Vec2D<float> v1_position = v1->position - ((v1->position - v2->position)).norm() * (v1->radius + 10.0f);
+			Vec2D<float> v2_position = v2->position - ((v2->position - v1->position)).norm() * (v2->radius + 10.0f);
 
+			Color c = {229, 181, 103, 255};
+			if(active) c = {108, 153, 187, 255};
+			DrawLine(v1_position.x, v1_position.y, v2_position.x, v2_position.y, c);
+
+			Vec2D<float> from_to_handle = v1->position - ((v1->position - v2->position)).norm() * (v1->radius + 35);
+			Vec2D<float> to_from_handle = v2->position - ((v2->position - v1->position)).norm() * (v2->radius + 35);
+
+			if(ViButton(from_to_handle.x, from_to_handle.y, 8.0f, v1_v2 ? (Color){232, 125, 62, 255} : (Color){232, 50, 32, 255} )) v1_v2 = !v1_v2;
+			if(ViButton(to_from_handle.x, to_from_handle.y, 8.0f, v2_v1 ? (Color){232, 125, 62, 255} : (Color){232, 50, 32, 255} )) v2_v1 = !v2_v1;
 		}
 };

src/main.cpp

@@ -34,6 +34,9 @@
 
 #include "node.h"
 #include "signal.h"
+#include "connection.h"
+
+#include "connection-manager.h"
 
 libremidi::observer obs;
 libremidi::midi_out midi_out;
@@ -43,8 +46,8 @@ std::vector<libremidi::output_port> midi_out_ports;
 
 std::vector<Node> nodes;
 std::vector<Signal> signals;
-
-//std::map<Movable*, std::vector<Node*>> connections;
+//std::vector<Connection> connections;
+ConnectionManager cm;
 
 Vec2D<float> mouse_pos;
 Vec2D<float> drag_start;
@@ -99,7 +102,7 @@ int main(){
 	}
 	
 	for(int i = 0; i < 2; i++){
-		signals.emplace(signals.end(), Signal(0, 0, 5.0f, 2.0f));
+		signals.emplace(signals.end(), Signal(1280, 720, 5.0f, 2.0f));
 		signals[i].next = &nodes[0];
 	}
 
@@ -155,9 +158,9 @@ int main(){
 					}
 					
 					if(mouse_released && (n.hover_connect || n.hover_move)) {
-						if(&n != connecting_from){
-							n.connections.push_back(connecting_from);
-							connecting_from->connections.push_back(&n);
+						if(&n != connecting_from && connecting_from != nullptr){
+							cm.connections.emplace(cm.connections.end(), connecting_from, &n);
+							connecting_from = nullptr;
 						}
 					}
 
@@ -182,19 +185,14 @@ int main(){
 					n.draw(&mouse_pos);
 				}
 
-				/*for( auto from : connections){*/
-				/*	for( auto to : from.second){*/
-				/*		Vec2D<float> from_position = from.first->position - ((from.first->position - to->position)).norm() * (from.first->radius + 10.0f);*/
-				/*		Vec2D<float> to_position = to->position - ((to->position - from.first->position)).norm() * (to->radius + 10.0f);*/
-				/*		DrawLine(from_position.x, from_position.y, to_position.x, to_position.y, (Color){229, 181, 103, 255});*/
-				/*	}*/
-				/*}*/
+				cm.draw();
 
-				for( auto& s : signals){
+				for(auto& s : signals){
 					s.direction = s.next->position - s.position;
 					if(s.position.dist(&s.next->position) < s.speed * 1.5) {
-						if(s.next->connections.size() > 0) {
-							s.next = s.next->get_next();
+						Node* n = cm.next(s.next);							
+						if(n != s.next && n != nullptr) {
+							s.next = n;
 							midi_out.send_message(libremidi::channel_events::control_change(2, 10, 50));
 						}
 					}

src/node.h

@@ -22,19 +22,19 @@ class Node : public Movable{
 	bool hover_connect = false;
 	bool connecting = false;
 
-	int next = 0;
+//	int next = 0;
 
 	int midi_out = 0;
 
 	int midi_note = 0;
 	int midi_cc = 0;
 
-	std::vector<Node*> connections;
+//	std::vector<Node*> connections;
 
-	Node* get_next(){
-		next = (next+1) % connections.size();
-		return connections[next];
-	}
+	/*Node* get_next(){*/
+	/*	next = (next+1) % connections.size();*/
+	/*	return connections[next];*/
+	/*}*/
 
 	void draw(Vec2D<float> *mouse) {
 		if(!hover_move) DrawCircle(position.x, position.y, radius, (Color){180, 210, 115, 255});
@@ -42,11 +42,11 @@ class Node : public Movable{
 		
 		Vec2D<float> connector = position - ((position - *mouse)).norm() * (radius + R);
 		
-		for(auto& to : connections){
-			Vec2D<float> from_position = position - ((position - to->position)).norm() * (radius + 10.0f);
-			Vec2D<float> to_position = to->position - ((to->position - position)).norm() * (to->radius + 10.0f);
-			DrawLine(from_position.x, from_position.y, to_position.x, to_position.y, (Color){229, 181, 103, 255});
-		}
+		/*for(auto& to : connections){*/
+		/*	Vec2D<float> from_position = position - ((position - to->position)).norm() * (radius + 10.0f);*/
+		/*	Vec2D<float> to_position = to->position - ((to->position - position)).norm() * (to->radius + 10.0f);*/
+		/*	DrawLine(from_position.x, from_position.y, to_position.x, to_position.y, (Color){229, 181, 103, 255});*/
+		/*}*/
 		
 		if(hover_connect){
 			DrawCircleLines(position.x, position.y, radius + R, (Color){108, 153, 187, 255});