marching squares 1,1 stairstep draft. buggy

lib/qtgraph/edge.cpp

@@ -37,18 +37,22 @@ void Edge::adjust()
     if (!source || !dest)
         return;
 
-    QLineF line(mapFromItem(source, 0, 0), mapFromItem(dest, 0, 0));
+//     QLineF line(mapFromItem(source, 0, 0), mapFromItem(dest, 0, 0));
-    qreal length = line.length();
+//     qreal length = line.length();
+
+  QLineF line(source->pos(), dest->pos());
 
     prepareGeometryChange();
 
-    if (length > qreal(20.)) {
+//     if (length > qreal(20.)) {
-        QPointF edgeOffset((line.dx() * 10) / length, (line.dy() * 10) / length);
+//         QPointF edgeOffset((line.dx() * 10) / length, (line.dy() * 10) / length);
-        sourcePoint = line.p1() + edgeOffset;
+//         sourcePoint = line.p1() + edgeOffset;
-        destPoint = line.p2() - edgeOffset;
+//         destPoint = line.p2() - edgeOffset;
-    } else {
+//     } else {
-        sourcePoint = destPoint = line.p1();
+//         sourcePoint = destPoint = line.p1();
-    }
+//     }
+  sourcePoint = line.p1();
+  destPoint = line.p2();
 }
 
 QRectF Edge::boundingRect() const
@@ -74,12 +78,14 @@ void Edge::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
     if (qFuzzyCompare(line.length(), qreal(0.)))
         return;
 
+    const qreal line_thickness = 0.1;
+
     // Draw the line itself
     if (m_isRoute) {
-      painter->setPen(QPen(Qt::red, 10, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+      painter->setPen(QPen(Qt::red, line_thickness*2, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
       setZValue(1);
     } else {
-      painter->setPen(QPen(Qt::black, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+      painter->setPen(QPen(Qt::blue, line_thickness, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
       setZValue(0);
     }
 

lib/qtgraph/floats.hpp

@@ -29,6 +29,7 @@ struct float2 {
 };
 
 inline bool operator ==(const float2& v1, const float2& v2) { return v1.x == v2.x && v1.y == v2.y; }
+inline bool operator !=(const float2& v1, const float2& v2) { return v1.x != v2.x || v1.y != v2.y; }
 
 inline float2 operator +(const float2& v1, const float2& v2) { return float2(v1.x + v2.x, v1.y + v2.y); }
 inline float2 operator -(const float2& v1, const float2& v2) { return float2(v1.x - v2.x, v1.y - v2.y); }

lib/qtgraph/main.cpp

@@ -76,10 +76,9 @@ int main(int argc, char **argv)
 {
   SafeQApplication app(argc, argv);
 
-  const std::string xml_file = "graph_example.xml";
+  Graph<float2> g;
-  Graph<float2> g = readGraphFromXML<float2>(xml_file, float2creator);
 
-  const std::string png_file = "first_map.png";
+  const std::string png_file = "test.png";
 
   GraphWidget *widget = new GraphWidget(&g, QString::fromStdString(png_file));
   widget->updateFromGraph();
@@ -95,6 +94,5 @@ int main(int argc, char **argv)
   mainWindow.show();
   const int app_retval = app.exec();
 
-  writeGraphToXML<float2>(g, xml_file, float2serializer);
   return app_retval;
 }

lib/qtgraph/marching_squares.cpp

@@ -40,6 +40,9 @@ namespace {
     int2 (const int2& o) : x(o.x), y(o.y) {}
     void operator+=(const int2 o) { x += o.x; y += o.y; }
   };
+
+#define ASSERT(x) \
+  if (!(x)) std::cerr << __FILE__ << ":" << __LINE__ << ":" << __PRETTY_FUNCTION__ << (x) << std::endl;
 }
 
 MarchingSquares::MarchingSquares()
@@ -67,8 +70,8 @@ void MarchingSquares::ReadImage(const std::string& filename)
 
       /// @todo extend image?
       // mark borders as SOLID, such that the entities in the world cannot fall off
-      if (x == 0 || x == width_ - 1 || y == 0 || y == height_ - 1)
+//       if (x == 0 || x == width_ - 1 || y == 0 || y == height_ - 1)
-        c = SOLID;
+//         c = SOLID;
 
       // mark white "hole" cells sorrounded by 4 black cells as black
       if (y > 1 && y < height_-1 && x > 1 && x < width_-1 &&
@@ -126,17 +129,6 @@ MarchingSquares::RunMarchingSquares() {
       if (mask == 0x0 || mask == 0xf) // empty or full
         continue;
 
-      // vertical/horizontal lines start with an edge
-//       assert(mask !=  3);
-//       assert(mask != 12);
-//       assert(mask !=  5);
-//       assert(mask != 10);
-
-      // cannot reach nonvisited bottomright corner
-      /// @note you can. the last is not visited
-//       assert(mask != 1);
-//       assert(mask != 14);
-
       visitPoint(point.x, point.y, mask, visited, lines);
     }
     std::cout << std::endl;
@@ -172,11 +164,39 @@ void MarchingSquares::visitPoint(int x, int y, int mask, std::vector< bool >& vi
 
   if (!horizontal && !vertical)
     return;
-//   assert(horizontal || vertical);
 
-//   const bool start_2_lines = (mask == 0x7 || mask == 0x6 || mask == 0x8 || mask == 0x9);
+  if (mask == 0x8 || mask == 0xb) {
+    int2 i(x, y);
+    while ((getMaskAt(i.x, i.y+1) == 0xe || getMaskAt(i.x, i.y+1) == 0x6) &&
+           getMaskAt(i.x-1, i.y+1) == 0x8 /*&&
+           visited[(i.y)*width_ + i.x] == false*/) {
+      visited[(i.y+1)*width_ + i.x] = true;
+      visited[(i.y+1)*width_ + i.x-1] = true;
+      i += int2(-1, 1);
+    }
+    if (i.x != x || i.y != y) {
+      visited[(i.y-1)*width_ + i.x+1] = false;
+      lines.push_back(std::pair<float2, float2>(float2(x, y),  float2( i.x, i.y)));
+    }
+  }
+  if (mask == 1) {
+    int2 i(x, y);
+    while ((getMaskAt(i.x-1, i.y) == 0x6 || getMaskAt(i.x-1, i.y) == 0x7) &&
+           getMaskAt(i.x-1, i.y+1) == 0x1 /*&&
+           visited[(i.y)*width_ + i.x] == false*/) {
+      visited[i.y*width_ + i.x-1] = true;
+      visited[(i.y+1)*width_ + i.x-1] = true;
+      i += int2(-1, 1);
+    }
+    if (i.x != x || i.y != y) {
+      visited[(i.y-1)*width_ + i.x+1] = false;
+      lines.push_back(std::pair<float2, float2>(float2(x, y),  float2( i.x, i.y)));
+    }
+  }
 
   if (horizontal) {
+
+    // go left till possible
     int2 i(x, y);
     while (true) {
       i += int2(1, 0);
@@ -191,8 +211,11 @@ void MarchingSquares::visitPoint(int x, int y, int mask, std::vector< bool >& vi
       else
         break;
     }
+    if (i.x != x) {
+      visited[i.y*width_ + i.x] = false;
       lines.push_back(std::pair<float2, float2>(float2(x, y),  float2( i.x, i.y)));
     }
+  }
 
   if (vertical) {
     int2 i(x, y);
@@ -209,6 +232,9 @@ void MarchingSquares::visitPoint(int x, int y, int mask, std::vector< bool >& vi
       else
         break;
     }
+    if (i.y != y) {
+      visited[i.y*width_ + i.x] = false;
       lines.push_back(std::pair<float2, float2>(float2(x, y),  float2( i.x, i.y)));
     }
+  }
 }