dxfjs/writer

A JavaScript dxf generator written in TypeScript.

writer

A Javascript dxf generator, written in Typescript.

Installation

yarn add @tarikjabiri/dxf
# Or npm
npm i @tarikjabiri/dxf
# Or pnpm
pnpm add @tarikjabiri/dxf

Getting started

import { Writer, point } from "@tarikjabiri/dxf";

const writer = new Writer();
const modelSpace = writer.document.modelSpace;

// Add entites to the model space
modelSpace.addLine({
  start: point(),
  end: point(100, 100),
  // Other options...
});

// To get the dxf content just call the stringify() method
const content = writer.stringify();

More informations

• Documentation

Sponsors

writer's Issues

2.89 AddPolyline Undefined

I'm looking to add 3d polylines to my dxf, following the example in examples/polyline.ts, but it's throwing an undefined error.

Is this feature not yet implemented in release? Is there a way to use polyline right now?

support xdata

For example, the extended data of the font style

1001
ACAD
1000
YouYuan
1071
34353

Adding more tests

AlignedDimension does not write 11, 21, 31 so that the z-axis cannot be set correctly.

11_21_31.zip

i have issue when addImage

i add many image to cad but when i save to dwg or restart my computer file cad receive only last image. If I open the dxf file immediately it still receive all image
imgRegion.forEach((img, index) => {
let ordinateBotLeft = convertWgs84ToVn2000([
img.pointCenter[0] - dx / 2,
img.pointCenter[1] - dy / 2,
0,
]);
let ordinateTopRight = convertWgs84ToVn2000([
img.pointCenter[0] + dx / 2,
img.pointCenter[1] + dy / 2,
0,
]);
dxf.addImage(
"..\" + img.name + ".png",
img.name,
point3d(ordinateBotLeft[1], ordinateBotLeft[0]),
sizeMap[0],
sizeMap[1],
Math.abs(ordinateBotLeft[1] - ordinateTopRight[1]),
0
);
});

Hatching pattern ANSI31 is not showing correctly

hi sir,
Currently ANSI31 shows the below pattern

and the pattern which is shown in autocad is

Singleton approach

Hi,

For now almost every objects are singletons, why do we need this ? Can we add a way to destroy the instance ? Or maybe just make DxfWriter scoped ?

Chinese characters cannot be shown in dxf

When I use addText() to add text with chinese characters, they are displayed as ?. How can I write chinese correctly?

Changes are not reflecting on v2.6.0

Sir
I had made a pr for color hex value to main branch but the changes are not reflecting on the version 2.6.0
please check

entity:viewport

http://docs.autodesk.com/ACD/2011/ENU/filesDXF/WS1a9193826455f5ff18cb41610ec0a2e719-79c6.htm

Fill Rectangle Entity

Hello

I am having an issue filling up entity (Rectangle entity )
how can I implement that considering that I am having an canvas and then I transfer it into .dxf so it can be downloaded

the downloaded file is full of pixels when zooming in (of course because the rectangles are not filled )

can you help me doing that? ASAP

Thank you in advance

Add CI for tests and build checks

I think it would be nice to use github actions to add automatic tests & build check

Leader line.

Hi sir,
I wanted to use leader line but its not there.
It will of great help if it can be added.

Thanks.

Dxf Image dimensions issue

Hi,

I am trying to add images to dxf with different dimensions, setting different width and height.
I found out that if I set smaller values to width and height, the images get bigger.

code example:

const dxf = new DxfWriter();

//IMAGE 1
const img1 = dxf.addImage(
'C:\Users\dev\Desktop\example.jpg', //Or the absolute path if not in the same folder.
'TEST', //The name of the image.
point3d(10, 10, 0), // The insertion point.
600, // The width of the image in pixels.
600, //The height of the image in pixels.
1, //The scale to be applied to the image.
0 //The rotation angle (Degrees) to be applied to the image.
);
img1.clippingStateFlag = 0;

//IMAGE 2
const img2 = dxf.addImage(
'C:\Users\dev\Desktop\example.jpg', //Or the absolute path if not in the same folder.
'TEST', //The name of the image.
point3d(-10, -10, 0), // The insertion point.
60, // The width of the image in pixels.
60, //The height of the image in pixels.
1, //The scale to be applied to the image.
0 //The rotation angle (Degrees) to be applied to the image.
);
img2.clippingStateFlag = 0;

const dxfString = dxf.stringify();
this.downloadFile(dxfString);

---

In the output dxf file, "IMAGE 2" (width 60 , height 60) is TEN times bigger than "IMAGE 1" (width 600 , height 600) and
I was expecting the opposite result.

Maybe am I missing something?

Header setvariable function

initially I was trying to set units to meter by
dxf.header.setVariable('$INSUNITS', 6); // units to meter
but the above code was not working

the below one worked but can we simplify this to the above one. the above one looks better and simple I think.
dxf.header.setVariable('$INSUNITS', { 70: 6 }); // units to meter

addLinearDim is not working precisely (e.g. from Jsketcher)

Hi,
Not sure if here is the right place, but when drawing in Jsketcher horizontal dimenstion, the dxf value is not precisely.
In the image below you can see it as "8000".

but the data after using the dxf export is calculate not as horizontal line but as free line with angle.

The dxf file:

And the the wrong calculated of Dimesion with "8066"

Thanks

Support for Polyface Meshes

Hi, fantastic library,

I was wondering if the library currently has support for creating polyface meshes?
It should be a variation of the polyline entity, however the section about polyline seems to be empty in the documentation: https://dxf.vercel.app/guide/entities.html#polyline

I found the flag for PolyfaceMesh available and I tried to create it like this:

    writer.addPolyline3D(vertices, {
      flags: PolylineFlags.PolyfaceMesh,
      layerName,
    });

However, I think I would need to be able to set flags on each vertex, to define faces for example? Am I missing something or is this just not supported yet? If so, do you have any plans to add support for this?

Best regards

Is there support for DXF ASTM/AAMA format ?

dimStyle.DIMTXSTY It would be better to provide a reasonable default value.

dimStyle.DIMTXSTY = "16";//Equal to the default Dimstyle handle. Without it, the annotation style will not be correctly displayed.

what do you think

In-block Dimension cannot be displayed

block.zip
in autocad
Double-click the edit block, save it, and it will be displayed

Invalid block name do not throw or not re-formated

I found out that blocks with a name containing special characters like : are not supported by some viewer like Archicad. I think it could be nice to reformat it or to throw an error to avoid error.

question about updating existing dxf

hi, i am working on an application which can automatically add text to existing dxf drawings.

I notice your application "dxf" can create new dxf file, would it be possible if you read existing dxf files first and then I put some new TEXTs to the dxf file, later export as a new dxf ?

Spline with weights

Hello,

Thank you for all the work done so far.

Currently splines with weights are not managed. It's a pity because we can't draw all the cases. Do you plan to implement this feature?

Thanks.

Multiple DIMSTYLE issues

When I add any number of DimStyles, the generated DXF document won't open on AutoCAD.

Inspecting the file I've found that there is an AcDbDimStyleTable subclass before each DIMSTYLE and this is causing the error.

As a workaround I changed the DxfDimStyle and DxfTable classes.

The DxfDimStyle class I commented this line:

dx.subclassMarker('AcDbDimStyleTable');

And on the DxfTable:

class DxfTable {
    constructor(name) {
        this.name = name;
        this.maxNumberEntries = 0;
        this.ownerObjectHandle = '0';
        this.handle = Handle.next();
        this.records = [];
    }
    dxify(dx) {
        dx.type('TABLE');
        dx.name(this.name);
        dx.handle(this.handle);
        dx.push(330, this.ownerObjectHandle);
        dx.subclassMarker('AcDbSymbolTable');
        dx.push(70, this.records.length);
        // Added this IF clause to ensure only one AcDbDimStyleTable
        if (this.name == "DIMSTYLE") {
            dx.subclassMarker('AcDbDimStyleTable');
        }
        for (const record of this.records)
            record.dxify(dx);
        dx.type('ENDTAB');
    }
}

This change allowed me to open the files on AutoCAD

missmatched hatches

Hi

when i try to plot Predefined "CROSS" hatch,
but result was "CORK"

some other hatches were missmatched too.

in your code
https://github.com/dxfjs/writer/blob/fd22b111d49ff6805dc7d75550c748e6ebbda006/src/Internals/HatchPatterns.ts#L957:L990
135 degree lines are not required in cross pattern

please check this part, thanks!

• and some patterns are broken when i scale them

trueColor types?

Hi,

I'm a bit confused with the mix of string and number for trueColor. Should it be number throughout?

• https://github.com/dxfjs/writer/blob/next/src/entities/entity.ts#L25
• https://github.com/dxfjs/writer/blob/next/src/tables/layer.ts#L31

The `Text` entity not fully customizable.

Add support for all properties:

• rotation
• obliqueAngle
• generationFlags
• horizontalAlignment
• verticalAlignment
• secondAlignmentPoint
• relativeXScaleFactor

not able to justify the text to middle center

when I am doing this
function drawText() {
const text = dxf.addText(point3d(20, 20, 0), 1, 'GGWP', {
rotation: 30,
horizontalAlignment: 1,
verticalAlignment: 2,
})
console.log('text: ', text);
}
the position of the text becomes origin

I tried second alignment point also
text.secondAlignmentPoint = point3d(20, 20, 0);
it is also not working
pls help

Supporting more entities

Support more entities

• Image
• Insert
• And more as we go.

Can i change style of texte?

I am not able to add image in dxf

i tried this

const imgDef = dxf.addImage("door.jpg", 'door.jpg', point3d(20, 20, 0), 10, 10, 1, 0);

the file gets download without any error but the file is not opening it says press enter to continue and after that nothing happens.

i consoled the imgDef i got this

pls help.

Possible to import via CDN?

Hi,

I'd really like to use this for a project; any chance to make it importable via a CDN?

Thanks.

Solid Hatching is not working

hi sir,
Solid hatching is not working, I tried the below code
const polyline = new HatchPolylineBoundary();
polyline.add(vertex(0, 0));
polyline.add(vertex(0, 10));
polyline.add(vertex(10, 10));
polyline.add(vertex(10, 0));

const polyline1 = new HatchPolylineBoundary();
polyline1.add(vertex(1, 1));
polyline1.add(vertex(1, 9));
polyline1.add(vertex(9, 9));
polyline1.add(vertex(9, 1));


// const edges = new HatchEdgesTypeData();
// edges.addLineEdgeData(point2d(0, 0), point2d(0, 10000));
// edges.addLineEdgeData(point2d(0, 10000), point2d(10000, 10000));
// edges.addLineEdgeData(point2d(10000, 10000), point2d(10000, 0));
// edges.addLineEdgeData(point2d(10000, 0), point2d(0, 0));

const boundary = new HatchBoundaryPaths();
// Add the defined path
boundary.addPolylineBoundary(polyline, PolylineFlags.External);
boundary.addPolylineBoundary(polyline1, PolylineFlags.Outermost);

const mysolid = pattern({
    name: HatchPredefinedPatterns.SOLID,
    // scale: 0.05,
    // angle: 287.89,
    // Other properties you can define optionally
    // angle?: number;
    // scale?: number;
    // double?: boolean;
});

const hatch = dxf.addHatch(boundary, mysolid);

Adding full support of blocks creation and insertion

• Blocks implementation
• Enable full customization of blocks.
• Design a public api for adding and editing blocks.
• Writing tests

Stringify Performance

Hi,

for some automation stuff i am working on, i did a quick test-run of your very nice package.
My intention is to compose a DXF from several sub-drawings, which already works nicely.
These sub-drawings can become quite detailed, though.
My current test-setup parses and inserts entities from an 8MB DXF into an instance of your writer class, which is real quick.

However, for the final write-to-disc, i need to stringify(), which unfortunately takes about 30sec.

Do you think there's a way of speeding things up here?

Property 'addImageDef' does not exist on type 'DxfWriter'

I'm using this package in a typescript project and i'm not able to use .addImageDef

I'm getting the error

Property 'addImageDef' does not exist on type 'DxfWriter'

Below is the screenshot - in the screenshot this.exporter is the DxfWriter

Add support for `Hatch` entity

• Implement Hatch class 🎉
• Add support for hatching entities already existing directly 🎉
• Support all predefined patterns 🎉
• Support all type of hatches 🎉
• Adding tests 🎉

ObjectARX Problem

Could you help me out with .net objectArx ??

I would like to create a layout with 6 views in it(Top, Front, Left, Right, Bottom , Back ). The views should fit in the viewports accurately and the visual style be hidden. The views should be black in color so that i can view them when exported. Finally export the pdf.

ObjectARX code:

private static void StyleViewport(Autodesk.AutoCAD.DatabaseServices.Viewport viewport)
{
using (Database db = HostApplicationServices.WorkingDatabase)
{
using (Transaction tr = db.TransactionManager.StartTransaction())
{
// "Hidden" is the name of the visual style you want
viewport.VisualStyleId = GetVisualStyleId(db, "Hidden");

// Set other properties if needed
viewport.Color = Autodesk.AutoCAD.Colors.Color.FromRgb(0, 0, 0);

tr.Commit();
}
}
}

[CommandMethod("InsertViewsToLayout")]
public static void InsertViewsToLayout()
{
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;

using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) as BlockTable;

BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.PaperSpace], OpenMode.ForWrite) as BlockTableRecord;

// Switch to the previous Paper space layout
Application.SetSystemVariable("TILEMODE", 0);
acDoc.Editor.SwitchToPaperSpace();

// Get the current layout
LayoutManager acLayoutMgr = LayoutManager.Current;
Layout acLayout = acTrans.GetObject(acLayoutMgr.GetLayoutId(acLayoutMgr.CurrentLayout), OpenMode.ForWrite) as Layout;

Point3d[] viewPositions = {
new Point3d(2.5, 5.5, 0),
new Point3d(2.5, 2.5, 0),
new Point3d(5.5, 5.5, 0),
new Point3d(5.5, 2.5, 0),
new Point3d(8.5, 5.5, 0),
new Point3d(8.5, 2.5, 0)
};

Vector3d[] viewDirections = {
new Vector3d(0, 0, -1),
new Vector3d(0, 0, 1),
new Vector3d(-1, 0, 0),
new Vector3d(1, 0, 0),
new Vector3d(0, -1, 0),
new Vector3d(0, 1, 0)
};

for (int i = 0; i < viewPositions.Length; i++)
{
using (Autodesk.AutoCAD.DatabaseServices.Viewport acVport = new Autodesk.AutoCAD.DatabaseServices.Viewport())
{
acVport.CenterPoint = viewPositions[i];
acVport.Width = 2.5;
acVport.Height = 2.5;

// Add the new viewport to the layout's block table record
acBlkTblRec.AppendEntity(acVport);
acTrans.AddNewlyCreatedDBObject(acVport, true);

// Set the view direction
acVport.ViewDirection = viewDirections[i];

// Set the visual style
StyleViewport(acVport);

// Enable the viewport
acVport.On = true;
}
}

acTrans.Commit();
acDoc.Editor.Regen();
}
}

Here's my code:
Error is :
Severity Code Description Project File Line Suppression State
Error CS0103 The name 'GetVisualStyleId' does not exist in the current context AutoCad C:\Users\source\repos\AutoCad\AutoCad\Commands.cs 268 Active

i am trying a lot but unable to figure out the solution.
Please resolve my issue.

You can also modify approach of viewports, You can insert views using "Base->Model Space" that way...

Cannot customize entities

We need to be able to customize entities.

• Set different color.
• Set true color.
• Set thickness and so on ...

Add documentation

• Creating docs for the library.

Adding support of objects