tetraflexagon_diagram: fix typo

The function is called calc_angle_in_plan().

diff --git a/src/flexagon/tetraflexagon_diagram.py b/src/flexagon/tetraflexagon_diagram.py
index eb2c807..8045c23 100755 (executable)
--- a/src/flexagon/tetraflexagon_diagram.py
+++ b/src/flexagon/tetraflexagon_diagram.py
@@ -81,7 +81,7 @@ class TetraflexagonDiagram(object):
         dest_x, dest_y = self.get_tile_center_in_plan(tile)
 
         i, j = self.tetraflexagon.get_tile_plan_position(tile)
-        theta = tile.get_angle_in_plan(i, j)
+        theta = tile.calc_angle_in_plan(i, j)
 
         # The transformation from a tile in the square to the correspondent
         # tile in the plan is composed by these steps: