UserManual:Tools:Curves
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Draft Mode - Tools | Curve
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Curve tools
Some lines need to curve, and in this section, we deal only with curves of various types. To get your curve right, you can click on the line and drag it around to get close to what you require and there are 'handles' that you can click and drag around until you get the right shape that you're looking for, or you can use exact degrees.
Curve - Interactive (Shortcut Alt+C)
Spline - Interactive (Shortcut Alt+S)
Tool Curve tool which uses point as control handle
Available since version 0.5.0.
This tool uses 4 points to create a curve. So click on the 4 points in order of the direction you wish to go and a perfectly even curve will be created for you.
The only way to edit this, is to delete the curve and create a new one using other points. You may only change the line colour.
Note: As with all lines and curves, it will reshape itself if the measurements change.
Tool Curved path
Select all the points along the curve that you wish to create, press 'Enter' to end selecting and use the handles to tweak the curve to suit you. You need to select 3 or more points.
Note. This tool was redesigned in version 0.5.0. Since 0.5.0 you can control length and angle of 'handles' by formulas.
Tool Segment a curved path
Select the curve that you wish to segment, a formula box will pop up and you can select the exact segment you wish to place a point in and complete the formula.
Tool for creating curves
Available since version 0.5.0.
This is a great tool for creating full circle skirts but it has many other uses. Click on 7 or more points that you wish to use to create your curve and press 'Enter' when done. In the 1st image below, I have selected a number of points at random, just to show what it does. In the 2nd image, I have used it in the armhole (perhaps not the best place to use it). And in the 3rd image, I have used it to create the waist of a full circle skirt.
Tool Point intersection curves
Available since version 0.5.0.
Select the 1st curve and then the 2nd curve. A point will be placed at the place where the 2 curves intersect.
Tool Point intersect curve and axis
Select the curve. Click 1st axis point and then the next. A point will be placed where the curve and axis line intersect, with a line from the 1st axis point to the new point.
Note: I have mostly used the armhole curve to demonstrate these curves, so that one can identify with the use and view the differences created by using the different curve tools. For instance, the 'Tool for creating curves' wouldn't be the ideal tool to use at the armhole.
Fabrice has created a pattern illustrating the use of various points, lines and curves that you may download for further instruction: