methods get_y

pgfw/Interpolator.py

@@ -124,7 +124,14 @@ class Nodeset(list):
         self.splines = [CubicSpline(self[ii].x, a[ii], b[ii], c[ii],
                                     d[ii]) for ii in xrange(n)]
 
-    def get_y(self, t):
+    def get_y(self, t, loop=False, natural=False):
+        if loop:
+            t %= self[-1].x
+        elif not natural:
+            if t < self[0].x:
+                t = self[0].x
+            elif t > self[-1].x:
+                t = self[-1].x
         splines = self.splines
         for ii in xrange(len(splines) - 1):
             if t < splines[ii + 1].x: