Drawing Module/sv

Ritnings modulen tillåter dig att lägga ut ditt 3D arbete på papper. Det är, att lägga vyer av dina modeller i ett 2D fönster osh att sätta in det fönstret i en ritning, till exempel ett ark med en ram, en titel och din logotyp och slutligen skriva ut det arket. Ritningsmodulen är för närvarande under konstruktion och är mer eller mindre en teknologisk förhandstitt!

Development of the Drawing Module has stopped, and a new TechDraw Module aiming to replace it will be introduced in version 0.17. Both modules will be provided in v0.17, but the Drawing module may be removed in future releases.

Gränssnittsverktyg

Detta är verktyg för att skapa, konfigurera och exportera 2D ritningsark

Open scalable vector graphic: Opens a drawing sheet previously saved as an SVG file

New A3 landscape drawing: Creates a new drawing sheet from FreeCAD's default A3 template

Insert a view: Inserts a view of the selected object in the active drawing sheet

Annotation: Adds an annotation to the current drawing sheet

Clip: Adds a clip group to the current drawing sheet

Open Browser: Opens a preview of the current sheet in the browser

Ortho Views: Automatically creates orthographic views of an object on the current drawing sheet

Symbol: Adds the contents of a SVG file as a symbol on the current drawing sheet

Draft View: Inserts a special Draft view of the selected object in the current drawing sheet

Spreadsheet View: Inserts a view of a selected spreadsheet in the current drawing sheet

Save sheet: Saves the current sheet as a SVG file

Project Shape: Creates a projection of the selected object (Source) in the 3D view.

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.

I bilden så ser du huvudkoncepten av Ritningsmodulen. Dokumentet innehåller ett formobjekt (Schenkel) som vi vill göra en ritning av. Därför så är en "Sida" skapad. Sidan fås genom en mall, i detta fall "A3_Landskap" mallen. Mallen är ett SVG dokument som kan innehålla din vanliga sidram, din logotyp eller så den överensstämmer med dina presentationsstandarder.

I denna sida så kan vi sätta in en eller fler vyer. Varje vy har en position på sidan (Egenskaper X,Y), en skalfaktor (Egenskap skala) och ytterligare egenskaper. Varje gång som sidan ,eller vyn, eller det refererade objektet ändras så regenereras sidan och visningen uppdateras.

Skript

För tillfället så är arbetsflödet för slutanvändaren väldigt begränsat, så skript API't är intressantare. Här följer exempel på hur man använder skript API't för ritningsmodulen.

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

Enkelt exempel

Först av allt så behöver du Del och Ritningsmodulen:

import FreeCAD, Part, Drawing

Skapa en liten exempeldel:

Part.show(Part.makeBox(100,100,100).cut(Part.makeCylinder(80,100)).cut(Part.makeBox(90,40,100)).cut(Part.makeBox(20,85,100)))

Direkt projektion. G0 innebär hård kant, G1 är kontinuerlig tangent.

Shape = App.ActiveDocument.Shape.Shape
[visibleG0,visibleG1,hiddenG0,hiddenG1] = Drawing.project(Shape)
print "visible edges:", len(visibleG0.Edges)
print "hidden edges:", len(hiddenG0.Edges)

Allting projicerades på Z-planet:

print "Bnd Box shape: X=",Shape.BoundBox.XLength," Y=",Shape.BoundBox.YLength," Z=",Shape.BoundBox.ZLength
print "Bnd Box project: X=",visibleG0.BoundBox.XLength," Y=",visibleG0.BoundBox.YLength," Z=",visibleG0.BoundBox.ZLength

Annan projectionsvektor

[visibleG0,visibleG1,hiddenG0,hiddenG1] = Drawing.project(Shape,App.Vector(1,1,1))

Projicera till SVG

resultSVG = Drawing.projectToSVG(Shape,App.Vector(1,1,1))
print resultSVG

Det parametriska sättet

Skapa kroppen

import FreeCAD
import Part
import Drawing

# Create three boxes and a cylinder
App.ActiveDocument.addObject("Part::Box","Box")
App.ActiveDocument.Box.Length=100.00
App.ActiveDocument.Box.Width=100.00
App.ActiveDocument.Box.Height=100.00

App.ActiveDocument.addObject("Part::Box","Box1")
App.ActiveDocument.Box1.Length=90.00
App.ActiveDocument.Box1.Width=40.00
App.ActiveDocument.Box1.Height=100.00

App.ActiveDocument.addObject("Part::Box","Box2")
App.ActiveDocument.Box2.Length=20.00
App.ActiveDocument.Box2.Width=85.00
App.ActiveDocument.Box2.Height=100.00

App.ActiveDocument.addObject("Part::Cylinder","Cylinder")
App.ActiveDocument.Cylinder.Radius=80.00
App.ActiveDocument.Cylinder.Height=100.00
App.ActiveDocument.Cylinder.Angle=360.00
# Fuse two boxes and the cylinder
App.ActiveDocument.addObject("Part::Fuse","Fusion")
App.ActiveDocument.Fusion.Base = App.ActiveDocument.Cylinder
App.ActiveDocument.Fusion.Tool = App.ActiveDocument.Box1

App.ActiveDocument.addObject("Part::Fuse","Fusion1")
App.ActiveDocument.Fusion1.Base = App.ActiveDocument.Box2
App.ActiveDocument.Fusion1.Tool = App.ActiveDocument.Fusion
# Cut the fused shapes from the first box
App.ActiveDocument.addObject("Part::Cut","Shape")
App.ActiveDocument.Shape.Base = App.ActiveDocument.Box 
App.ActiveDocument.Shape.Tool = App.ActiveDocument.Fusion1
# Hide all the intermediate shapes 
Gui.ActiveDocument.Box.Visibility=False
Gui.ActiveDocument.Box1.Visibility=False
Gui.ActiveDocument.Box2.Visibility=False
Gui.ActiveDocument.Cylinder.Visibility=False
Gui.ActiveDocument.Fusion.Visibility=False
Gui.ActiveDocument.Fusion1.Visibility=False

Sätt in ett sid objekt och välj en mall

App.ActiveDocument.addObject('Drawing::FeaturePage','Page')
App.ActiveDocument.Page.Template = App.getResourceDir()+'Mod/Drawing/Templates/A3_Landscape.svg'

Skapa en vy på "Shape" objektet, definiera position och skala och sätt in den i en sida

App.ActiveDocument.addObject('Drawing::FeatureViewPart','View')
App.ActiveDocument.View.Source = App.ActiveDocument.Shape
App.ActiveDocument.View.Direction = (0.0,0.0,1.0)
App.ActiveDocument.View.X = 10.0
App.ActiveDocument.View.Y = 10.0
App.ActiveDocument.Page.addObject(App.ActiveDocument.View)

Skapa en andra vy på samma objekt men denna gång kommer vyn att vara roterad 90 grader.

App.ActiveDocument.addObject('Drawing::FeatureViewPart','ViewRot')
App.ActiveDocument.ViewRot.Source = App.ActiveDocument.Shape
App.ActiveDocument.ViewRot.Direction = (0.0,0.0,1.0)
App.ActiveDocument.ViewRot.X = 290.0
App.ActiveDocument.ViewRot.Y = 30.0
App.ActiveDocument.ViewRot.Scale = 1.0
App.ActiveDocument.ViewRot.Rotation = 90.0
App.ActiveDocument.Page.addObject(App.ActiveDocument.ViewRot)

Skapa en tredje vy av samma objekt men med en isometrisk vyriktning. Gömda linjer aktiveras också.

App.ActiveDocument.addObject('Drawing::FeatureViewPart','ViewIso')
App.ActiveDocument.ViewIso.Source = App.ActiveDocument.Shape
App.ActiveDocument.ViewIso.Direction = (1.0,1.0,1.0)
App.ActiveDocument.ViewIso.X = 335.0
App.ActiveDocument.ViewIso.Y = 140.0
App.ActiveDocument.ViewIso.ShowHiddenLines = True
App.ActiveDocument.Page.addObject(App.ActiveDocument.ViewIso)

Ändra något och uppdatera. Uppdateringsprocessen ändrar vyn och sidan.

App.ActiveDocument.View.X = 30.0
App.ActiveDocument.View.Y = 30.0
App.ActiveDocument.View.Scale = 1.5
App.ActiveDocument.recompute()

Komma åt bitarna

Hämte SVG fragment på en enkel vy

ViewSVG = App.ActiveDocument.View.ViewResult
print ViewSVG

Hämta hela resultatsidan (det är en fil i dokumentets temporära katalog, endast läsrättigheter)

print "Resulting SVG document: ",App.ActiveDocument.Page.PageResult
file = open(App.ActiveDocument.Page.PageResult,"r")
print "Result page is ",len(file.readlines())," lines long"

Viktigt: Frigör filen!

del file

Sätt in en vy med ditt eget innehåll:

App.ActiveDocument.addObject('Drawing::FeatureView','ViewSelf')
App.ActiveDocument.ViewSelf.ViewResult = """<g id="ViewSelf"
  stroke="rgb(0, 0, 0)"
  stroke-width="0.35"
  stroke-linecap="butt"
  stroke-linejoin="miter"
  transform="translate(30,30)"
  fill="#00cc00"
  >

  <ellipse cx="40" cy="40" rx="30" ry="15"/>
  </g>"""
App.ActiveDocument.Page.addObject(App.ActiveDocument.ViewSelf)
App.ActiveDocument.recompute()

del ViewSVG

Det leder till följande resultat:

General Dimensioning and Tolerancing

Drawing dimensions an tolerances 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:

import gdtsvg as g # Import the module, I like to give it an easy handle
ourFrame = g.ControlFrame("0","0", g.Perpendicularity(), ".5", g.Diameter(), g.ModifyingSymbols("M"), "A",  
           g.ModifyingSymbols("F"), "B", g.ModifyingSymbols("L"), "C", g.ModifyingSymbols("I"))

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:

X-coordinate in SVG-coordinate system (type string)
Y-coordinate in SVG-coordinate system (type string)
The desired geometric characteristic symbol (tuple, svg string as first, width of symbol as second, height of symbol as third)
The tolerance (type string)
(optional) The diameter symbol (tuple, svg string as first, width of symbol as second, height of symbol as third)
(optional) The condition modifying material (tuple, svg string as first, width of symbol as second, height of symbol as third)
(optional) The first datum (type string)
(optional) The first datum's modifying condition (tuple, svg string as first, width of symbol as second, height of symbol as third)
(optional) The second datum (type string)
(optional) The second datum's modifying condition (tuple, svg string as first, width of symbol as second, height of symbol as third)
(optional) The third datum (type string)
(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:

import gdtsvg
ourDimension = linearDimension(point1, point2, textpoint, dimensiontext, linestyle=getStyle("visible"), 
               arrowstyle=getStyle("filled"), textstyle=getStyle("text")

Inputs for linear dimension are:

point1, an (x,y) tuple with svg-coordinates, this is one of the points you would like to dimension between
point2, an (x,y) tuple with svg-coordinates, this is the second point you would like to dimension between
textpoint, an (x,y) tuple of svg-coordinates, this is where the text of your dimension will be
dimensiontext, a string containing the text you want the dimension to say
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
arrowstyle, a string containing svg (i.e. css) styles, using the getStyle function to retrieve a preset string, for styling how the arrows look
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.

Exempel

FreeCAD kommer med ett standardset med mallar, men du kan hitta fler på Ritningsmallar sidan.

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.

Tutorials

Drawing tutorial

External links

Intro to mechanical drawing on Youtube - by Normal Universe