dijkstra is now bleching fast

deleting from the grid is now bleaching fast
added new helper methods
many new test-cases
many new methods for geo classes and others
added a bunch of new grid-walkers

floorplan/FloorplanFactorySVG.h

@@ -184,11 +184,12 @@ private:
 						Stair s;
 						Line2 dir = scaler.scale(line);
 						s.dir = (dir.p2 - dir.p1);
-						const float d = 9;
-						s.from.add(start.p1 + Point2(-d,-d));
-						s.from.add(start.p1 + Point2(+d,+d));
-						s.from.add(start.p2 + Point2(-d,-d));
-						s.from.add(start.p2 + Point2(+d,+d));
+//						const float d = 50;
+						s.start = start;
+//						s.from.add(start.p1 + Point2(-d,-d));
+//						s.from.add(start.p1 + Point2(+d,+d));
+//						s.from.add(start.p2 + Point2(-d,-d));
+//						s.from.add(start.p2 + Point2(+d,+d));
 						stairs.push_back(s);
 					}
 				}

floorplan/PlatformStair.h

@@ -0,0 +1,17 @@
+#ifndef PLATFORMSTAIR_H
+#define PLATFORMSTAIR_H
+
+#include "Stair.h";
+
+
+class PlatformStair {
+
+	Stair s1;
+
+	BBox2 platform;
+
+	Stair s2;
+
+};
+
+#endif // PLATFORMSTAIR_H

floorplan/Stair.h

@@ -4,10 +4,11 @@
 #include "../geo/BBox2.h"
 #include "../geo/Point2.h"
 
+/** a simple stair with a slope from A to B */
 struct Stair {
 
-	/** bbox with all starting points */
-	BBox2 from;
+	/** starting line of the stair */
+	Line2 start;
 
 	/** the direction to move all the starting points to */
 	Point2 dir;