Draft tutorial/zh-hant

Introduction
This tutorial is meant to introduce the reader to the basic workflow of the Draft Workbench, which includes the creation of profiles, the use of working planes, and the creation of dimensions, text and annotations. This tutorial uses the notation (X, Y, Z) to denote the coordinates required to define points in an object.



Requirements

 * FreeCAD version 0.16 or above
 * The reader know how to use the Data and View tabs to change an element's properties if desired

Procedure
It is compulsory to make sure the Draft Snap toolbar will be available to use in this tutorial.


 * 1) Start FreeCAD
 * 2) If you haven't opened a new FreeCAD document (most of the FreeCAD window looks greyed-out), from the pull-down menu click File > New or click the Create A New Document tool [[Image:Document-new.svg|32px]].
 * 3) Activate the Draft Workbench
 * 4) Select the Edit menu
 * 5) Click on Preferences
 * 6) Go to Draft and select the Grid and snapping tab
 * 7) Verify that the Show Draft Snap toolbar is active

Note that you can change the visibility of the Grid in this menu, in case you wish to disable it.

Using Planes
Planes are used to restrict the behaviour of the Draft tools to a specific plane, avoiding problems with the location of points and curves in complex workpieces. Planes can reference the axes of the coordinate system (XY, YZ, ...) or they can use a planar surface in the document as its reference.


 * 1) Select  [[Image:Draft_SelectPlane.png|32px]] Set working plane. It can be located within the Draft workbench toolbar or inside the Draft menu in the Utilities division.
 * 2) Selec the XY plane

Creating Profiles
The creation of profiles can be done in several ways. Though it is possible to use simple arcs and lines to do most of the work, FreeCAD includes several tools to speed up the process.

Lines and Arcs

 * 1) Select [[Image:Draft_Arc.png]] Arc.
 * 2) Set the center at (0, 0, 0)
 * 3) Set the radius to 30 mm
 * 4) The starting angle is 60.0°
 * 5) The aperture is 60.0°

Repeat the same procedure for a second arc with a radius of 25 mm, the other properties remain unchanged.

We will now close the profile with a couple of lines.


 * 1) Select [[Image:Draft_Line.png]] Line.
 * 2) Approach the Endpoint of either arc. A white point should appear, alongside this icon  [[Image:Snap_Endpoint.png|32px]] when your cursor approaches the endpoint.
 * 3) Select the endpoint of the other arc.
 * 4) Repeat for the other side of the arcs.

We now have several curves that detail a profile, however it is still not recognized as a single entity. It is possible to continue working with the elements intact, though in this case we will fuse them into a single object.

The following actions will alter the way the objects behave, making it hard to edit their properties, so it is best to do any necessary modifications before proceeding.


 * 1) Select an arc and while pressing the CTRL key select the two line segments and the other arc.
 * 2) With these four objects selected, click on [[Image:Draft_Upgrade.png]] Upgrade.

This will upgrade the four objects into a single Wire.

Planes, Rectangles and Circles

 * 1) Click [[Image:Draft_Rectangle.png]] Rectangle
 * 2) Set the first point on (-100, -60, 0). (If Relative appears checked after setting this point un-check it before setting the second point).
 * 3) Set the second point on (140, 90, 0)

The result is a Plane. Its properties can be modified to remove the filling, by changing its Display Mode to Wireframe.


 * 1) Select [[Image:Draft_Circle.png]]
 * 2) Set the center to (0, 0, 0)
 * 3) Set the radius to 15 mm

Polygons

 * 1) Select [[Image:Draft_Polygon.png]] Polygon
 * 2) The center point is located at (0, 0, 0)
 * 3) Set the number of sides to 6
 * 4) Set the radius to 50 mm

Arrays
Arrays are used to replicate an object several times in a direction, a revolution axis or along a path.
 * 1) Select the Wire that was previously created
 * 2) Click  [[Image:Draft_Array.png|32px]] Array
 * 3) In the Data tab of the object, change the Array type from ortho to polar
 * 4) Change Number Polar from 1 to 4

Adding Dimensions
Dimensions require a constant use of Snapping Constraints to properly select the points that one wishes to dimension. The Snapping toolbar is used to change the possible points that can be selected.


 * 1) Select [[Image:Draft_Dimension.png]] Dimension
 * 2) Select the first point. This can be either an existing element or specified by coordinates. For this tutorial, the first point will always be (0, 0, 0)
 * 3) Select the second point. Approach the midpoint of the top line of the polygon. A white point should appear alongside this icon [[Image:Snap_Midpoint.png|32px]]
 * 4) Move the cursor to the desired location of the dimension and click on it.
 * 5) Change the font size on the View tab to 6 mm

Repeat the process for the arcs and circles.

Annotations and Text
There is a slight difference between the two: it is only possible to use the second one as a profile to perform 3D operations.

Annotations

 * 1) Select  [[Image:Draft_Text.png]] Text
 * 2) Select the reference point in the 3D View. In this case, the midoint of the top arc.
 * 3) Enter your text and press Enter. Repeat for as many lines of text as you wish to input.
 * 4) Press Enter

Text

 * 1) Select [[Image:Draft_ShapeString.png|32px]] ShapeString
 * 2) Select the reference point in the 3D View. This can be an existing point or the current cursor location.
 * 3) Enter your text and press Enter
 * 4) Set the desired font size
 * 5) Leave tracking at 0 mm
 * 6) Select the path to the font file that you wish to use

Creating Blueprints
To create blueprints, it is necessary to create a Drawing  with the elements that you wish to use. Please read the Drawing tutorial for a detailed description.

We are now finished with the basic workflow for the Draft Module.

Recommended Lectures

 * For a detailed description of the workbench, please see Draft Module
 * To know more about the Snapping controls, see Draft Snap