====== tool_image68 Create Spline ======

> 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 {{en:resources:pattern_tools_reference:tool_image68.png|tool_image68}} tool;
>   - Draw a spline by continuous left-clicking on the desired area and right-click to finish drawing.

{{en:resources:pattern_tools_reference:tool_image69.png|tool_image69}}


=== NOTE ===

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

===== Snap points by exact value =====

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

==== Draw Line L that goes through Point c ====

{{en:resources:pattern_tools_reference:tool_image70.png|tool_image70}}


> How to do:

>   - Select a reference point (like Point a);
>   - Select {{en:resources:pattern_tools_reference:tool_image68.png|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 . ====

>   - Select Line A;
>   - Select {{en:resources:pattern_tools_reference:tool_image68.png|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. > {{en:resources:pattern_tools_reference:tool_image71.png|tool_image71}}

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

{{en:resources:pattern_tools_reference:tool_image72.png|tool_image72}}


> How to do

>   - Select Line A;
>   - Select {{en:resources:pattern_tools_reference:tool_image68.png|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 {{en:resources:pattern_tools_reference:tool_image68.png|tool_image68}} tool;
>   - Move the cursor to Line A, the blue point, also the central point of Line A turns up. > {{en:resources:pattern_tools_reference:tool_image73.png|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 {{en:resources:pattern_tools_reference:tool_image68.png|tool_image68}} tool;
>   - Move your cursor to Line A, right-click to drag it till desired shape. > {{en:resources:pattern_tools_reference:tool_image74.png|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 {{en:resources:pattern_tools_reference:tool_image68.png|tool_image68}} tool;
>   - Move your cursor to Line A, left-click to drag it to desired position. > {{en:resources:pattern_tools_reference:tool_image75.png|tool_image75}}

===== Exercise =====

> For example, {{en:resources:pattern_tools_reference:tool_image68.png|tool_image68}} Create Spline can help users finish draw the red spline shown below.

{{en:resources:pattern_tools_reference:tool_image76.png|tool_image76}}


> How to do:

>   - Activate the piece and select Segment A;
>   - Select {{en:resources:pattern_tools_reference:tool_image68.png|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 {{en:resources:pattern_tools_reference:tool_image68.png|tool_image68}} Create Spline tool, then right-click the spline. The points appear so drag them to modify.