| ########################################## |
| cu2qu: Cubic to quadratic curve conversion |
| ########################################## |
| |
| Routines for converting cubic curves to quadratic splines, suitable for use |
| in OpenType to TrueType outline conversion. |
| |
| Conversion is carried out to a degree of tolerance provided by the user. While |
| it is relatively easy to find the best *single* quadratic curve to represent a |
| given cubic (see for example `this method from CAGD <https://www.sirver.net/blog/2011/08/23/degree-reduction-of-bezier-curves/>`_), |
| the best-fit method may not be sufficiently accurate for type design. |
| |
| Instead, this method chops the cubic curve into multiple segments before |
| converting each cubic segment to a quadratic, in order to ensure that the |
| resulting spline fits within the given tolerance. |
| |
| The basic curve conversion routines are implemented in the |
| :mod:`fontTools.cu2qu.cu2qu` module; the :mod:`fontTools.cu2qu.ufo` module |
| applies these routines to all of the curves in a UFO file or files; while the |
| :mod:`fontTools.cu2qu.cli` module implements the ``fonttools cu2qu`` command |
| for converting a UFO format font with cubic curves into one with quadratic |
| curves. |
| |
| fontTools.cu2qu.cu2qu |
| --------------------- |
| |
| .. automodule:: fontTools.cu2qu.cu2qu |
| :inherited-members: |
| :members: |
| :undoc-members: |
| |
| fontTools.cu2qu.ufo |
| ------------------- |
| |
| .. automodule:: fontTools.cu2qu.ufo |
| :inherited-members: |
| :members: |
| :undoc-members: |
