There is lot of examples how to create a pdf file on swift.
I search a lot for tutorials or idea how to create a dxf file on swift but I did not succeed.
Any help would be appreciated.
Regards
How to create dxf file on swift
Can you please tell me what is dxf file ?
dxf is Drawing Exchange File (American Standard Code for Information Exhange AutoCAD file format)
A File with extension dxf can be opened by autocad.
Thanks for clarifying. In fact, when I searched with "swift dxf file", I could not understand what the titles of the search results mean...
But, unfortunately, as far as I know, there are no functionalities in Apple's frameworks to handle dxf files.
Neither open source libiraries.
I'm afraid you may need to make it all by yourself.
I am not that expert to make it by myself man 😉 .
Anyway, thanks a lot for your replies
You'll find high level information for file structure on wikipedia
The basic organization of a DXF file is as follows
- HEADER section – General information about the drawing. Each parameter has a variable name and an associated value.
- CLASSES section – Holds the information for application-defined classes whose instances appear in the BLOCKS, ENTITIES, and OBJECTS sections of the database. Generally does not provide sufficient information to allow interoperability with other programs.
- TABLES section – This section contains definitions of named items.
- BLOCKS section – This section contains Block Definition entities describing the entities comprising each Block in the drawing.
- ENTITIES section – This section contains the drawing entities, including any Block References.
- OBJECTS section – Contains the data that apply to nongraphical objects, used by AutoLISP and ObjectARX applications.
- THUMBNAILIMAGE section – Contains the preview image for the DXF file.
- END OF FILE
For instance, following file is dxf for a circle : centre (0.0,0.0,0.0) radius 1.0
0
SECTION
2
ENTITIES
0
CIRCLE
10
0.0
20
0.0
30
0.0
40
1.0
0
ENDSEC
0
EOF
Detailed spec has been published by Autocad (It is a 250 pages document)
h ttp://images.autodesk.com/adsk/files/autocad_2012_pdf_dxf-reference_enu.pdf
How complex is the model you need to write as dxf ?
Maybe this could help with code
h ttps://github.com/codelibs/libdxfrw
@Claude31: thanks man for your explanation.
By the way, the library provided is writen on C++, and I am not sure to do the same but in swift.
in majority of languages, there are ways to write on dxf file except swift I think.
That's not necessarily a question of language but of existing libraries in this language. I doubt there are language primitive to write dxf.
What trype of drawing do you need to export ? Creating dxf seems pretty simple if the drawing is simple enough.
You could also post your question on autodesk forum
With the help of kind people like you, I would like to ask how I can create a valid dxf file which can be opened by autocad, and then how to create a function lets say "func drawline(p1: CGPoint, p2: CGPoint)" which can draw a line between 2 points on dxf file
Once I have the above, I will be able to draw any drawing doesnt matter it is complexity.
Regards
You have to create a text file ; as an example, create it for a circle ;
0
SECTION
2
ENTITIES
0
CIRCLE
10
0.0
20
0.0
30
0.0
40
1.0
0
ENDSEC
0
EOF
look at specification I have osted to see how to describe a line
So write something of this kind:
func createDXF() -> Bool {
var content : String
content = """
0
SECTION
2
ENTITIES
0
CIRCLE
10
0.0
20
0.0
30
0.0
40
1.0
0
ENDSEC
0
EOF
"""
do {
let documentDirUrl = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
let fileName = "output.dxf"
let fileUrl = documentDirUrl.appendingPathComponent(fileName)
do {
try content.write(to: fileUrl, atomically: true, encoding: .utf8)
} catch { // content.write
print(" ---> NO WRITE dxf", error)
return false
}
} catch { // FileManager.default.url
print(" ---> NO default.url", error)
return false
}
return true
}