select curLine in next step, only drawing lines for resulting hull

Display.cpp

@@ -265,8 +265,6 @@ void Display::update ()
                     m_points.erase(m_points.begin() + i);
                 }
             }
-
-            //setCurrentLine(); // set current line in next step
         }
         else
         {
@@ -309,10 +307,6 @@ void Display::update ()
 
             m_lines.push_back(Line(Point(left.x, left.y), Point(right.x, right.y)));
             m_lines.push_back(Line(Point(right.x, right.y), Point(left.x, left.y))); // add first line in both directions to work with "right side"
-
-            // set current line just by taking the only one (in one direction)
-            m_curLineIdx = 1;
-            m_curLine = m_lines[1];
         }
     }
     else if (curStep == 2)
@@ -457,10 +451,11 @@ void Display::render (sf::RenderWindow &window)
     // draw already calculated hull points
     std::sort(m_hullPoints.begin(), m_hullPoints.end(), less); // sort clockwise
 
+    size_t points = m_points.size();
     size_t elements = m_hullPoints.size();
     for (size_t i = 0; i < elements; ++i)
     {
-        window.draw(m_hullPoints[i]);
+        if (points > 0 || m_curLineIdx != -1) window.draw(m_hullPoints[i]);
 
         sf::Vertex ptTo;
         if (i < elements - 1) ptTo = sf::Vertex(m_hullPoints[i + 1].getPosition(), sf::Color::Blue);

NumberGenerator.h

@@ -94,6 +94,15 @@ public:
         {
             x = (i%2 == 0) ? OFFSET : WIDTH - OFFSET;
             y = diff/2 + (i/2) * diff;
+            /*if (i % 4 == 0)
+            {
+                x = OFFSET;
+            }
+            else
+            {
+                x = (i % 4) * WIDTH / 4;
+            }
+            y = diff / 4 + (i / 4) * diff;*/
 
             points.push_back(Point(x, y));
         }
@@ -129,8 +138,8 @@ public:
         for (int i = 0; i < valCount; ++i)
         {
             x = OFFSET + static_cast <float> (rand()) / (static_cast <float> (RAND_MAX / (std::min(WIDTH, HEIGHT) - 2 * OFFSET)));
-            points.push_back(Point(x, HEIGHT - x)); // /
-            //points.push_back(Point(x, HEIGHT - x)); // \
+            points.push_back(Point(x, HEIGHT - x)); // ascending
+            //points.push_back(Point(x, HEIGHT - x)); // descending
         }
         return points;
     }