Draft OCA
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Draft OCA |
| Menu location |
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| Workbenches |
| Draft |
| Default shortcut |
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| Introduced in version |
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| See also |
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Description
Draft OCA is a software module used by the 
Std Open, Std Import and Std Export commands to handle the OCA file format.
The OCA file format is community effort to create a free, simple and open CAD file format. OCA is largely based on the GCAD file format generated from gCAD3D. Both formats can be imported in FreeCAD, and the OCA files exported by FreeCAD can be opened in gCAD3D.
Importing
The following OCA objects can be imported:
- Lines
- Arcs and Circles
- Closed areas
Exporting
The following FreeCAD objects can be exported:
- Lines and wires (polylines)
- Arcs and circles
- Faces
Preferences
For more information see: Import Export Preferences.
Scripting
See also: Draft API and FreeCAD Scripting Basics.
You can export elements to OCA by using the following function:
importOCA.export(exportList, filename)
Example:
import FreeCAD, Draft, importOCA
p1 = FreeCAD.Vector(0, 0, 0)
p2 = FreeCAD.Vector(1000, 1000, 0)
p3 = FreeCAD.Vector(2200, 1500, 0)
p4 = FreeCAD.Vector(2500, -100, 0)
obj1 = Draft.makeWire([p1, p2, p3, p4])
obj2 = Draft.makeWire([p1, -2.3*p2, -0.8*p3, -1.8*p4])
objects = [obj1, obj2]
importOCA.export(objects, "/home/user/Pictures/myfile.oca")
Draft 
- Basics: Coordinates, Constraining, Snapping (Near, Extension, Parallel, Grid, Endpoint, Midpoint, Perpendicular, Angle, Center, Ortho, Intersection, Special, Dimensions, Working plane)
- Drawing: Line, Polyline, Fillet, Circle, Arc, Arc 3 points, Ellipse, Polygon, Rectangle, Text, Dimension, BSpline, Point, ShapeString, Facebinder, Cubic Bezier Curve, Bezier Curve, Label
- Modifying: Move, Rotate, Offset, Trimex, Join, Split, Upgrade, Downgrade, Scale, Edit, SubelementHighlight, Wire to BSpline, Add point, Delete point, Shape 2D View, Draft to Sketch, Array, LinkArray, Polar Array, Circular Array, Path Array, Path LinkArray, Point Array, Clone, Drawing, Mirror, Stretch
- Utilities: Set working plane, Finish line, Close line, Undo line, Toggle construction mode, Toggle continue mode, Apply style, Toggle display mode, Add to group, Select group contents, Toggle snap, Toggle grid, Show snap bar, Heal, Flip Dimension, VisGroup, Slope, AutoGroup, Set Working Plane Proxy, Add to Construction group
- Additional: Preferences, Import-Export Preferences (DXF/DWG, SVG, OCA, DAT); Draft API
User documentation 
- Getting started
- Installation: Download, Linux, Windows, MacOS, Docker, AppImage
- Basics: About FreeCAD, Interface, Workbenches, Preferences, Document structure, Properties, Mouse Model; Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base; Arch, Draft, FEM, Image, Inspection, Mesh, OpenSCAD, Part, PartDesign, Path, Points, Raytracing, Reverse Engineering, Sketcher, Spreadsheet, Start, Surface workbench, TechDraw, Test Framework, Web
- Unmaintained workbenches: Plot, Robot, Ship
- Deprecated workbenches: Complete, Drawing
- Code: Addon Manager, Addons, Macros, External workbenches
- Hubs: User hub, Power users hub, Developer hub
