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|tool_image68| Create Spline 
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  New in V7.0:

  Facilitates users to draw a continuous and accurate spline easily and quickly. Create Spline also allows users to curve a straight line or make a parallel without converting other tools. 
   
Draw contuinuous spline
========================

  To draw a continuous spline without point limitation: 

  How to do: 

  #. Select |tool_image68| tool; 

  #. Draw a spline by continuous left-clicking on the desired area and right-click to finish drawing.  
   
     |tool_image69|

.. note:: It will be a straight line if just click two points.  



Snap points by exact value
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  Allow users to snap the curve points by entering precise value.  

Draw Line L that goes through Point c
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  |tool_image70|

  How to do: 

  #. Select a reference point (like Point a); 

  #. Select |tool_image68| tool; 

  #. Hold down **Alt** key (Windows) or **Option** key (Macintosh) and click on the blank space; 

  #. Enter 2.5 to Distance X and 3 to Distance Y, click OK; 

  #. Point c appears, then connect Point c and Point b by spline.  


Take Point 1 as reference point, draw Point 2 and the distance between two point along Line A is 3 cm .  
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  #. Select Line A; 

  #. Select |tool_image68| tool; 

  #. Hold down the **Alt** key (Windows) or **Option** key (Macintosh) and left-click Point 1; 

  #. Enter 3 cm to **Along Segment** in the dialog box.  

      |tool_image71|



Draw Point b on Line A, and the distance between Point a and Point b is 3 cm:  
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      |tool_image72|

  How to do

  #. Select Line A; 

  #. Select |tool_image68| tool; 

  #. Hold down **Alt** key (Windows) or **Option** key (Macintosh) and left-click Point a; 

  #. Enter 3 to Radius; 

  #. Click OK button.  



Snap central point
======================

  Help users to snap the central point of the selected reference segment.  

  How to do: 
    
  #. Activate desired piece; 

  #. Select |tool_image68| tool; 

  #. Move the cursor to Line A, the blue point, also the central point of Line A turns up.  

      |tool_image73|  

Curve a segment
===================

  Right-click to drag the selected straight line into a curve.  

  How to do: 

  #. Activate desired piece, select Line A (your desired segment); 

  #. Select |tool_image68| tool; 

  #. Move your cursor to Line A, right-click to drag it till desired shape.  

       |tool_image74|

Draw parallel line
====================

  Drag the selected spline with left-clicking to draw parallel line.  

  #. Activate desired piece, select Line A (your desired segment); 

  #. Select |tool_image68| tool; 

  #. Move your cursor to Line A, left-click to drag it to desired position. 

	 |tool_image75|   

Exercise
===========

  For example, |tool_image68| Create Spline can help users finish draw the red spline shown below.  

       |tool_image76|

  How to do: 

  #. Activate the piece and select Segment A; 
     
  #. Select |tool_image68| tool; 
      
  #. Hold down the **Alt** key (Windows) or **Option** key (Macintosh) and left-click point#1; 
     
  #. Input the values of **Along Segment** in the dialog box, a point will appear in Segment A and left-click it; 
       
  #. Move the mouse to line B, it will snap the middle point of Segment B automatically; 
        
  #. Left-click the middle point of Segment B; 
        
  #. Hold down the **Alt** key (Windows) or **Option** key (Macintosh) and left-click the point#2, input values in Distance X and Distance Y, the point will appear, then left-click it; 
      
  #. Move the mouse to line C, the middle point of Segment B will appear automatically, then left-click it; 
     
  #. Right-click to end drawing.  
        

.. note::
       
       Press **Z** key on the keyboard to undo the former point; 
       
       Left-click to add point with holding down the **Shift** key.  Left-click to select the point wanted to be deleted with holding down the **Ctrl** key (Windows) or **Command** key (Macintosh) then press the **Backspace** key on the keyboard;  

       If users want to modify the shape of the existing spline, select |tool_image68| Create Spline tool, then right-click the spline.  The points appear so drag them to modify.  
	   
.. |tool_image68| image:: _static/tool_image68.png
.. |tool_image69| image:: _static/tool_image69.png
.. |tool_image70| image:: _static/tool_image70.png
.. |tool_image71| image:: _static/tool_image71.png
.. |tool_image72| image:: _static/tool_image72.png
.. |tool_image73| image:: _static/tool_image73.png
.. |tool_image74| image:: _static/tool_image74.png
.. |tool_image75| image:: _static/tool_image75.png
.. |tool_image76| image:: _static/tool_image76.png