Drawing Module/de

Das Zeichnungsmodul erlaubt Ihnen, Ihre 3D-Arbeit zu Papier zu bringen. Das bedeutet, gewählte Ansichten von Ihren Modellen in einem 2D-Fenster anzeigen und dieses Fenster in eine Zeichnung einzufügen, zum Beispiel in ein Blatt mit einer Umrandung, einen Titel und Ihrem Logo und druckt schließlich das Blatt. Das Zeichnungsmodul wird zurzeit noch bearbeitet und ist mehr oder weniger eine Technologievorschau!

GUI Werkzeuge
Note The Draft Module has its own Draft_Drawing too to place Draft objects on paper. It has a couple of extra capabilities over the standard Drawing tools, and supports specific objects like Draft dimensions.



In diesem Bild sehen Sie die wichtigsten Konzepte des Zeichnungs-Modul. Das Dokument enthält einen Gestalt-Gegenstand (Schenkel), den wir zu einer Zeichnung herausziehen wollen. Deshalb wird eine "Seite" erstellt. Eine Seite wird durch eine Schablone, in diesem Fall die "A3_Landscape" Schablone realisiert. Die Vorlage ist ein SVG-Dokument, das Ihre üblichen Blatt-Rahmen und Ihr Logo beinhaltet, oder Ihre Präsentations-Standards erfüllt.

In diese Seite können wir eine oder mehrere Ansichten einfügen. Jede Ansicht hat eine Position auf der Seite (Eigenschaften X, Y), einen Skalen-Faktor (Eigene Skalierung) und zusätzliche Eigenschaften. Jedes Mal, wenn sich die Seite oder die Ansicht oder das referenzierte Objekt ändert, wird die Seite regeneriert, und die Seitenanzeige aktualisiert.

Scripting
Im Moment der Endbenutzer(GUI)-Arbeitsablauf sehr beschränkt, somit ist die Scripting-API interessanter. Hier folgen Beispiele darzu, wie man die Scripting-API des Zeichnungsmoduls verwendet.

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

Einfaches Beispiel
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.