x,y = build_path([(600,1972), (600+bcoef, 1972-acoef)])
ax.plot(x, y, 'r-')
+ p = PatchCollection([Circle((2400,972), 225)],
+ cmap=matplotlib.cm.jet,
+ alpha=0.5, facecolor=(1.,0.,0.))
+ ax.add_collection(p)
+
# limit
#x,y = build_poly([(250,250), (2750,250), (2750,1850), (250,1850)])
#ax.plot(x, y, 'g--')
ax.grid(color = (0.3, 0.3, 0.3))
ax.set_xlim(-100, 3100)
ax.set_ylim(-100, 2200)
+ #ax.set_xlim(0, 825)
+ #ax.set_ylim(1472, 1972)
#ax.set_title('spline paths')
#plt.show()
fig.savefig(filename)