B
    CVvg•  ã               @   sr   d dl mZ d dlmZ d dlmZ d dlmZm	Z	 d dl
mZ d dlmZ G dd„ de	eƒZG d	d
„ d
eƒZdS )é    )Ú
prototypes)ÚGEOSCoordSeq)ÚGEOSException)ÚGEOSGeometryÚLinearGeometryMixin)ÚPoint)Únumpyc                   s¦   e Zd ZejZdZdZ‡ fdd„Zdd„ Z	dd„ Z
d	d
„ ZeZdd„ Zdd„ Zdd„ Zedd„ ƒZeZdd„ Zedd„ ƒZedd„ ƒZedd„ ƒZedd„ ƒZ‡  ZS )Ú
LineStringé   Tc                sÜ  t |ƒdkr|d }n|}t|ttfƒs@tr8t|tjƒs@tdƒ‚| d¡}t |ƒ}|sptƒ j	|  
d¡|d� dS || jk r’td| jj| j|f ƒ‚t|ttfƒ }|rØ|j}t |ƒdkrÀtd	ƒ‚|  |d ¡ |d }n\d}xV|D ]N}	t|	tttfƒsþtd
ƒ‚|dk�rt |	ƒ}|  |¡ qât |	ƒ|krâtdƒ‚qâW tt ||¡t|dkƒd�}
|dk�r`|
jn|
j}xXt|ƒD ]L}|�rŒ||dd…f }n$t|| tƒ�r¨|| j}n|| }|||ƒ �qpW tƒ j	|  
|
j¡|d� dS )a«  
        Initialize on the given sequence -- may take lists, tuples, NumPy arrays
        of X,Y pairs, or Point objects.  If Point objects are used, ownership is
        _not_ transferred to the LineString object.

        Examples:
         ls = LineString((1, 1), (2, 2))
         ls = LineString([(1, 1), (2, 2)])
         ls = LineString(array([(1, 1), (2, 2)]))
         ls = LineString(Point(1, 1), Point(2, 2))
        é   r   z-Invalid initialization input for LineStrings.ÚsridN)r   z'%s requires at least %d points, got %s.r
   zToo many dimensions.z4Each coordinate should be a sequence (list or tuple)zDimension mismatch.é   )Úz)ÚlenÚ
isinstanceÚtupleÚlistr   ZndarrayÚ	TypeErrorÚgetÚsuperÚ__init__Ú
_init_funcÚ
_minlengthÚ
ValueErrorÚ	__class__Ú__name__ÚshapeÚ	_checkdimr   r   ÚcapiÚ	create_csÚboolZ_set_point_3dZ_set_point_2dÚrangeÚptr)ÚselfÚargsÚkwargsÚcoordsr   ZncoordsZnumpy_coordsr   ÚndimZcoordÚcsZpoint_setterÚiZpoint_coords)r   © úF/tmp/pip-install-o3oxmrkh/Django/django/contrib/gis/geos/linestring.pyr      sT    






zLineString.__init__c             c   s$   xt t| ƒƒD ]}| | V  qW dS )z%Allow iteration over this LineString.N)r!   r   )r#   r)   r*   r*   r+   Ú__iter__\   s    zLineString.__iter__c             C   s
   t | jƒS )z/Return the number of points in this LineString.)r   Ú_cs)r#   r*   r*   r+   Ú__len__a   s    zLineString.__len__c             C   s
   | j | S )N)r-   )r#   Úindexr*   r*   r+   Ú_get_single_externale   s    zLineString._get_single_externalc       
      C   sŽ   | j j}| j j}| j}tt ||¡|d�}xt|ƒD ]\}}|||< q4W |  |j	¡}	|	r‚t 
| j	¡ |	| _	|d k	rx|| _|  ¡  ntdƒ‚d S )N)r   z3Geometry resulting from slice deletion was invalid.)r-   ZdimsÚhaszr   r   r   r   Ú	enumerater   r"   Zdestroy_geomZ
_post_initr   )
r#   ÚlengthÚitemsr'   r1   r   r(   r)   Úcr"   r*   r*   r+   Ú	_set_listj   s    
zLineString._set_listc             C   s   || j |< d S )N)r-   )r#   r/   Úvaluer*   r*   r+   Ú_set_single   s    zLineString._set_singlec             C   s   |dkrt dƒ‚d S )N)r
   r   zDimension mismatch.)r   )r#   Zdimr*   r*   r+   r   ‚   s    zLineString._checkdimc             C   s   | j jS )zDReturn a tuple version of the geometry from the coordinate sequence.)r-   r   )r#   r*   r*   r+   r   ‡   s    zLineString.tuplec                s0   ‡ fdd„t t| ƒƒD ƒ}tr(t |¡S |S dS )z{
        Return a sequence (list) corresponding with the given function.
        Return a numpy array if possible.
        c                s   g | ]}ˆ |ƒ‘qS r*   r*   )Ú.0r)   )Úfuncr*   r+   ú
<listcomp>’   s    z'LineString._listarr.<locals>.<listcomp>N)r!   r   r   Úarray)r#   r:   Úlstr*   )r:   r+   Ú_listarr�   s    
zLineString._listarrc             C   s   |   | jj¡S )z(Return a numpy array for the LineString.)r>   r-   Ú__getitem__)r#   r*   r*   r+   r<   ˜   s    zLineString.arrayc             C   s   |   | jj¡S )z/Return a list or numpy array of the X variable.)r>   r-   ZgetX)r#   r*   r*   r+   Úx�   s    zLineString.xc             C   s   |   | jj¡S )z/Return a list or numpy array of the Y variable.)r>   r-   ZgetY)r#   r*   r*   r+   Úy¢   s    zLineString.yc             C   s   | j s
dS |  | jj¡S dS )z/Return a list or numpy array of the Z variable.N)r1   r>   r-   ZgetZ)r#   r*   r*   r+   r   §   s    zLineString.z)r   Ú
__module__Ú__qualname__r   Zcreate_linestringr   r   Zhas_csr   r,   r.   r0   Z_get_single_internalr6   r8   r   Úpropertyr   r&   r>   r<   r@   rA   r   Ú__classcell__r*   r*   )r   r+   r	   	   s$   Nr	   c               @   s"   e Zd ZdZejZedd„ ƒZdS )Ú
LinearRingé   c             C   s   | j rtdƒ‚| jjS )Nz8Orientation of an empty LinearRing cannot be determined.)Úemptyr   r-   Úis_counterclockwise)r#   r*   r*   r+   rI   µ   s    zLinearRing.is_counterclockwiseN)	r   rB   rC   r   r   Zcreate_linearringr   rD   rI   r*   r*   r*   r+   rF   ±   s   rF   N)Zdjango.contrib.gis.geosr   r   Z django.contrib.gis.geos.coordseqr   Zdjango.contrib.gis.geos.errorr   Z django.contrib.gis.geos.geometryr   r   Zdjango.contrib.gis.geos.pointr   Zdjango.contrib.gis.shortcutsr   r	   rF   r*   r*   r*   r+   Ú<module>   s    )