.. include:: headings.inc

.. module:: lib.pdfviewer.bezier

.. currentmodule:: lib.pdfviewer.bezier

.. highlight:: python



.. _lib.pdfviewer.bezier:

==========================================================================================================================================
|phoenix_title|  **bezier**
==========================================================================================================================================




|function_summary| Functions Summary
====================================

================================================================================ ================================================================================
:func:`~lib.pdfviewer.bezier.calculate_bezier`                                   Calculate a bezier curve from 4 control points and return a
:func:`~lib.pdfviewer.bezier.compute_points`                                     Input 4 control points as wxRealPoints and convert to vec2d instances.
================================================================================ ================================================================================


|



Functions
------------

.. function:: calculate_bezier(p, steps = 30)

   Calculate a bezier curve from 4 control points and return a 
   list of the resulting points.
   Depends on the 2d vector class from http://www.pygame.org/wiki/2DVectorClass
    
   2007 Victor Blomqvist
   Released to the Public Domain    
   The function uses the forward differencing algorithm described at 
   http://www.niksula.cs.hut.fi/~hkankaan/Homepages/bezierfast.html


.. function:: compute_points(controlpoints, nsteps=30)

   Input 4 control points as wxRealPoints and convert to vec2d instances.
   compute the nsteps points on the resulting curve and return them
   as a list of wxPoints