triangle visualisation of edges

README.md

@@ -11,6 +11,13 @@ Projet conçu pour une compilation avec GCC et la librairie Raylib. De par la na
 
 ⚠️ Bien prendre le temps de lire la section d'installation qui vous concerne ⚠️
 
+```mermaid
+graph TD;
+    Antho-->Bobby;
+    Antho-->Clariss;
+    Bobby-->Dede;
+    Clariss-->Dede;
+```
 
 ### Linux (Debian based, *e.g.* Ubuntu) - Fortement recommandé
 ---

src/controlpanel.c

 #include "controlpanel.h"
 
 #include "raylib.h"
+#include "raymath.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
 
+// Tools
+void printVector2( Vector2 v )
+{
+    printf( "[%3f, %3f]", v.x, v.y );
+}
+
 // Constructor / Destructor
 Panel * Panel_new()
 {
@@ -86,7 +93,15 @@ void Panel_drawEdge(Panel * self, Edge * e)
     Vector2 source= Panel_pixelFromPosition(self, &(e->_source->position) );
     Vector2 target= Panel_pixelFromPosition(self, &(e->_target->position) );
 
-    DrawLineV(source, target, BLUE);
+    Vector2 ortho= (Vector2){ target.x-source.x, target.y-source.y }; // Vector from Source to Target
+
+    float ratio= 10.f / Vector2Length( ortho );
+    ortho= (Vector2){ -ortho.y*ratio, ortho.x*ratio };// 10 ortho-normal vector from v 
+
+    Vector2 source1= (Vector2){source.x-ortho.x, source.y-ortho.y};
+    Vector2 source2= (Vector2){source.x+ortho.x, source.y+ortho.y};
+
+    DrawTriangle(source1, source2, target, BLUE);
 }
 
 Vector2 Panel_pixelFromPosition(Panel * self, Vector2 * p)

src/controlpanel.h

@@ -3,6 +3,15 @@
 
 #include "networld.h"
 
+
+// Tools
+void printVector2( Vector2 v );
+
+
+//-----------------------------------//
+//--        Cotrol Panel           --//
+//-----------------------------------//
+
 struct Str_Panel {
     Vector2 camera, screenCenter;
     float scale; // meter per pixel

src/main-viewer.c

@@ -37,7 +37,7 @@ int main(int nbArg, char ** arg)
 
     NetWorld_connect(world, 0, 1);
     NetWorld_connect(world, 1, 2);
-    NetWorld_connect(world, 2, 0);
+    NetWorld_biconnect(world, 2, 0);
 
     Panel * panel= Panel_new();
     Panel_initialize(panel, world);