+
+ x,y = build_path([(375,0), (375,2050)])
+ ax.plot(x, y, 'r-')
+
+ x,y = build_path([(150,1972), (2850,472)])
+ ax.plot(x, y, 'r-')
+
+ x,y = build_path([(0,1722), (3000,1722)])
+ ax.plot(x, y, 'r-')
+
+ x,y = build_path([(150,972), (1950,1972)])
+ ax.plot(x, y, 'r-')
+
+ acoef = (2850-150)/5.
+ bcoef = (472-1972)/5.
+ x,y = build_path([(600,1972), (600+bcoef, 1972-acoef)])
+ ax.plot(x, y, 'r-')
+