o
    Ðùad  ã                   @   sR   d Z ddlmZ ddlmZmZmZmZ ddlZdgZ	dd„ Z
G dd„ deƒZdS )	z#Calculate the perimeter of a glyph.é    )ÚBasePen)ÚapproximateQuadraticArcLengthCÚcalcQuadraticArcLengthCÚapproximateCubicArcLengthCÚcalcCubicArcLengthCNÚPerimeterPenc                 C   s$   t  | d |d  | d |d  ¡S )Nr   é   )ÚmathZhypot)Úp0Úp1© r   ú=/usr/lib/python3/dist-packages/fontTools/pens/perimeterPen.pyÚ	_distance   s   $r   c                   @   s^   e Zd Zddd„Zdd„ Zdd„ Zd	d
„ Zdd„ Zdd„ Zdd„ Z	dd„ Z
dd„ Zdd„ ZdS )r   Nç{®Gázt?c                 C   sN   t  | |¡ d| _|| _|dkr| jn| j| _|dkr!| j| _	d S | j| _	d S )Nr   gú~j¼t“X?gú~j¼t“H?)
r   Ú__init__ÚvalueÚ	toleranceÚ_addCubicQuadratureÚ_addCubicRecursiveÚ	_addCubicÚ_addQuadraticQuadratureÚ_addQuadraticExactÚ_addQuadratic)ÚselfZglyphsetr   r   r   r   r      s
    zPerimeterPen.__init__c                 C   s
   || _ d S ©N)Ú_PerimeterPen__startPoint©r   r
   r   r   r   Ú_moveTo   s   
zPerimeterPen._moveToc                 C   s&   |   ¡ }|| jkr|  | j¡ d S d S r   )Ú_getCurrentPointr   Ú_lineTor   r   r   r   Ú
_closePath   s   
ÿzPerimeterPen._closePathc                 C   s    |   ¡ }|  jt||ƒ7  _d S r   )r   r   r   )r   r   r
   r   r   r   r   $   s   zPerimeterPen._lineToc                 C   ó   |  j t|||ƒ7  _ d S r   )r   r   ©r   Úc0Úc1Úc2r   r   r   r   (   ó   zPerimeterPen._addQuadraticExactc                 C   r!   r   )r   r   r"   r   r   r   r   +   r&   z$PerimeterPen._addQuadraticQuadraturec                 C   s&   |   ¡ }|  t|Ž t|Ž t|Ž ¡ d S r   )r   r   Úcomplex)r   r   Úp2r
   r   r   r   Ú_qCurveToOne.   s   zPerimeterPen._qCurveToOnec                 C   s    |  j t||||| jƒ7  _ d S r   )r   r   r   ©r   r#   r$   r%   Zc3r   r   r   r   2   s    zPerimeterPen._addCubicRecursivec                 C   s   |  j t||||ƒ7  _ d S r   )r   r   r*   r   r   r   r   5   s   z PerimeterPen._addCubicQuadraturec                 C   s,   |   ¡ }|  t|Ž t|Ž t|Ž t|Ž ¡ d S r   )r   r   r'   )r   r   r(   Zp3r
   r   r   r   Ú_curveToOne8   s   $zPerimeterPen._curveToOne)Nr   )Ú__name__Ú
__module__Ú__qualname__r   r   r    r   r   r   r)   r   r   r+   r   r   r   r   r      s    
)Ú__doc__ZfontTools.pens.basePenr   ZfontTools.misc.bezierToolsr   r   r   r   r	   Ú__all__r   r   r   r   r   r   Ú<module>   s   