Drawing Workbench/fr

L'atelier de mise en plan (Drawing) vous permet de coucher sur papier votre projet 3D, en mettant des vues de votre modèle dans une fenêtre 2D et en insérant cette fenêtre dans une mise en plan (page). Celle-ci pourra avoir une bordure, un titre et un logo, et cette page pourra ensuite être imprimée. L'atelier de mise en plan est pour le moment en construction et consiste plus ou moins en un aperçu technologique !

Outils graphiques
Le Module Draft a son propre module de dessin qui place les objets du projet sur papier. Il a quelques fonctionnalités supplémentaires sur les outils de dessin standards et prend en charge les objets spécifiques tels que les dimensions.



La capture d'écran ci-dessus montre les concepts principaux de l'atelier de Mise en plan. Le document contient un objet (Schenkel) que nous voulons extraire dans une mise en plan. Une « Page » est donc créée. Une page est générée depuis un gabarit, dans ce cas le gabarit « A3_Landscape ». Ce gabarit est un document SVG qui peut contenir un cadre de page, un cartouche avec votre logo se conformant à vos normes.

In this page we can insert one or more views. Each view has a position on the page (Properties X,Y), a scale factor (Property scale) and additional properties. Every time the page or the view or the referenced object changes the page gets regenerated and the page display updated.

Scripting
At the moment the end user(GUI) workflow is very limited, so the scripting API is more interesting. Here follow examples on how to use the scripting API of the drawing module.

Here a script that can easily fill the Macro_CartoucheFC leaf FreeCAD A3_Landscape.

Simple example
First of all you need the Part and the Drawing module: Create a small sample part Direct projection. The G0 means hard edge, the G1 is tangent continuous. Everything was projected on the Z-plane: Different projection vector Project to SVG

The parametric way
Create the body Insert a Page object and assign a template Create a view on the "Shape" object, define the position and scale and assign it to a Page Create a second view on the same object but this time the view will be rotated by 90 degrees. Create a third view on the same object but with an isometric view direction. The hidden lines are activated too. Change something and update. The update process changes the view and the page.

Accessing the bits and pieces
Get the SVG fragment of a single view Get the whole result page (it's a file in the document's temporary directory, only read permission) Important: free the file! Insert a view with your own content: That leads to the following result:



General Dimensioning and Tolerancing
Drawing dimensions an toleranecs are still under development but you can get some basic functionality with a bit of work.

First you need to get the gdtsvg python module from here (WARNING: This could be broken at any time!):

https://github.com/jcc242/FreeCAD

To get a feature control frame, try out the following: Here is a good breakdown of the contents of a feature control frame: http://www.cadblog.net/adding-geometric-tolerances.htm

The parameters to pass to control frame are:
 * 1) X-coordinate in SVG-coordinate system (type string)
 * 2) Y-coordinate in SVG-coordinate system (type string)
 * 3) The desired geometric characteristic symbol (tuple, svg string as first, width of symbol as second, height of symbol as third)
 * 4) The tolerance (type string)
 * 5) (optional) The diameter symbol (tuple, svg string as first, width of symbol as second, height of symbol as third)
 * 6) (optional) The condition modifying material (tuple, svg string as first, width of symbol as second, height of symbol as third)
 * 7) (optional) The first datum (type string)
 * 8) (optional) The first datum's modifying condition (tuple, svg string as first, width of symbol as second, height of symbol as third)
 * 9) (optional) The second datum (type string)
 * 10) (optional) The second datum's modifying condition (tuple, svg string as first, width of symbol as second, height of symbol as third)
 * 11) (optional) The third datum (type string)
 * 12) (optional) The third datum's material condition (tuple, svg string as first, width of symbol as second, height of symbol as third)

The ControlFrame function returns a type containing (svg string, overall width of control frame, overall height of control frame)'''

To get a dimension, try out the following: Inputs for linear dimension are:
 * 1) point1, an (x,y) tuple with svg-coordinates, this is one of the points you would like to dimension between
 * 2) point2, an (x,y) tuple with svg-coordinates, this is the second point you would like to dimension between
 * 3) textpoint, an (x,y) tuple of svg-coordinates, this is where the text of your dimension will be
 * 4) dimensiontext, a string containing the text you want the dimension to say
 * 5) linestyle, a string containing svg (i.e. css) styles, using the getStyle function to retrieve a preset string, for styling the how the lines look
 * 6) arrowstyle, a string containing svg (i.e. css) styles, using the getStyle function to retrieve a preset string, for styling how the arrows look
 * 7) textstyle, a string containing svg (i.e. css) styles, using the getStyle function to retrieve a preset string, for styling how the text looks

With those two, you can proceed as above for displaying them on the drawing page. This module is very buggy and can be broken at any given moment, bug reports are welcome on the github page for now, or contact jcc242 on the forums if you post a bug somewhere else.

Templates
FreeCAD comes bundled with a set of default templates, but you can find more on the Drawing templates page.

Extending the Drawing Module
Some notes on the programming side of the drawing module will be added to the Drawing Documentation page. This is to help quickly understand how the drawing module works, enabling programmers to rapidly start programming for it.