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QCAD - 2D CAD System.

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IDCategoryTask TypeSeveritySummary  descStatusProgress
 1856 QCAD (main)Feature RequestLow SVG import: add support for rotate transformations with ...Closed
Task Description

QCAD seems either to mishandle or ignore svg group transformations altogether.

Importing the attached file into QCAD renders the largest polygon (polygon18) to be rotated and misplaced. This is shown in actual.png. The expected result (original Inkscape renedering) is shown in expected.png.

Looking at the code of the original drawing it can be observed there is a transformation applied to the group which polygon18 is in:

   transform="rotate(-90,316.66796,298.95141)" >
      d="..." />

Removing the ‘transform’ attribute produces virtually identical (erroneous) rendering in Inkscape as well.

 1201 QCAD (main)Feature RequestLow SVG import: add support for circles, ellipses Closed
1 Task Description

The attached file should result in two overlapping circles, it does not, it results in a single ellipse.

The “<circle ... />” directive seems just be ignored in this case, but in other instances I have seen it result in ellipses.

And the “<ellipse ... />” directive should of course result in a circle, when rx and ry are the same.

 1175 QCAD (main)Bug ReportLow SVG import turns polylines into polygons Closed
Task Description

(I’m running on FreeBSD, but that was not an option in the selection for Operating System)

When importing a SVG file in version 3.7.5, it qcad turns polylines into polygons.

I’m attaching a trivial .SVG file showing this, it should *not* render as a rectangle,
but as a “rectangular upper case C”.

And many thanks for making good quality CAD software available to the FOSS community.

 603 QCAD (main)Bug ReportLow SVG import straight path segments Closed
Task Description

I noticed, that paths are not fully imported into QCAD. I rewrote case “m” of “SvgImporter” like below, that way also straight line segments are drawn correctly. Case “M” should be similar:

      case 'm':
          x = ox = coords[0];
          y = oy = coords[1];
          x0 = x;
          y0 = y;
          for (k=2; k<coords.length; k+=2) {
              x += coords[k+0];
              y += coords[k+1];
              this.importLine(ox, oy, x, y);
              ox = x;
              oy = y;
1242QCAD (main)Bug ReportLowSVG import DPI box should use localized decimal separat...Assigned
Task Description

I wanted to make it so, that SVG units translate 1:1 into CAD units; I use the German localized QCAD and entered 25,4 into the box with the wrong result, i.e. the same as 25; Entering 25.4 got me what I wanted: The question box needs the point and ignores the comma. Would be nice if it could use the localized separator.

 96 QCAD (main)Feature RequestLow SVG Import Closed
Task Description

Complete SvgImporter.js and SvgImport.js

  1. Implement SvgImporter.prototype.importFile to import the SVG file with the given fileName. Reading only all path data without any attributes or transformations is fine as a first step. SvgImporter.prototype.importFile() currently imports one hard coded path data as proof of concept.
  2. Implement SvgImport.prototype.beginEvent() to show a file open dialog that lets the user choose an SVG file to import.
  3. Support SVG as file format for part library items through SvgImporter

This should be enough to import any SVG file in library/symbols

 818 QCAD (main)Bug ReportLow SVG Exporter crashes on polyline Closed
Task Description

Attached sample drawing, that kills QCAD 3.1 beta when exporting to SVG.

The crash happens in line 38 of SvgExporterPG in function SvgExporterPG.prototype.exportPolyline

var pp = new RPainterPath(polyline.toPainterPath());
208QCAD (main)Feature RequestLowSVG export: support custom line weightsAssigned
Task Description

Find way to support custom line weights for SVG export. See also forum thread: http://www.ribbonsoft.com/rsforum/viewtopic.php?t=1594

 916 QCAD (main)Feature RequestLow SVG export: make zero line width behaviour configurable Closed
Task Description

Somewhere in the 3.1 series the SVG exporter (both precise and PG) started to make lines that are zero (0) width in CAD 0.01 (@scale 1:1) points wide in exported files (0.1 @scale 1:10). I use such lines to constrain exported files to a common size and rather not have them show. In my view, this is a regression, as there is no reason for changing line weight, isnt it? If I wanted the lines to have weight, I’d draw them with a weight.

 1842 QCAD (main)Bug ReportLow svg export shows texts in different place Closed
Task Description


when I export a dxf draw to svg the text objects shows in a bit different place.

QCAD version is

 137 QCAD (main)RefactoringLow SVG Export precision Closed
Task Description

In files exported with the (even PG) exporter I sometimes see values like these: 334.99999999999994 or 570.0000000000001 and very often 12 digits of precision.

To safe on file size, I suggest, that QCAD rounds values on SVG export to eg. three places. When viewed in an ordinary web browser, that will result in a precision of 1 inch / 96dpi / 1000 = 0.00026mm, not? Ends should still meet.

 334 QCAD (main)Bug ReportMedium SVG Export Polygons, arcs converted to straight lines. Closed
Task Description

When exporting a drawing to SVG, polygons containing arcs (trimmed circles in this case) are converted to straight lines. If the polygon is exploded first, then it exports correctly. Of course, this isn’t useful if closed polygons are required for the program using the SVG file. Solid hatch fills export correctly. See attached DXF and corresponding SVG export.

 217 QCAD (main)Bug ReportLow SVG export ignores exportPoints setting Closed
Task Description

Both SvgExporters ignore the exportPoints setting. Attached patch takes care of that. To be applied from within the “scripts” directory.

Nitpicking in File/SvgExport/SvgExport.js, var properties is meant to be a plain Object instead of an Array, isn’t it?

 90 QCAD (main)Bug ReportLow SVG Export group nesting Closed
Task Description

The SvgExporter opens a “group” for some entities, but never closes that group. The resulting nesting can get quite deep and does not conform to the original. I tentatively patched the script as below:

--- SvgExporter.js-orig	2011-05-23 10:55:17.239998578 +0200
+++ SvgExporter.js	2011-05-23 10:55:17.239998578 +0200
@@ -226,6 +226,11 @@
 //        RFileExporterAdapter.prototype.exportEntity.call(this, this.realEntity
 //                .data(), false);
 //    }
+    // dimensions and block references are grouped, close the group tag here
+    if (isDimension(entity) || isBlockReferenceEntity(entity)) {
+        this.writeEndElement();
+    }
 SvgExporter.prototype.endEntity = function() {

There might be a better way, but that is what I came up with on short notice.

 58 QCAD (main)Bug ReportLow SVG Export file name suggestion Closed
Task Description

Quick SVG Export suggests file name “Untitled 1 [*].svg”

Remove [*] (comes from window title).

 138 QCAD (main)RefactoringLow SVG Export entity properties "By Layer" and "By Block" Closed
Task Description

If I understand correctly, SVG export uses svg groups to keep QCAD block entities. This in itself is very useful. There is no way to correctly keep layer information, as QCAD blocks can contain elements on different layers, while SVG only knows about groups. That is a deficiency of SVG.

To save on file size, there was some potential to get rid of ever repeating same attributes on entities, eg: style=”stroke:#000000;stroke-width:0.25;stroke-dasharray:2.16,1.08”

To optimize “By Block” is easy: just set the attribute on the SVG group, and omit on below entities styled “By Block”.

To optimize “By Layer” is a little more involved, but might be solved by using css:
- Create a class by the name of the Layer
- add the class attribute to elements styled “By Layer”

Then only individually styled entities would get a style attribute, and filesize of SVG could be halved in most cases.

This just an idea :) Having written this, I now realize, that QCAD can style weight, pattern, color each extra, so the optimazition could only be applied to entities, where everything is “By Layer” or “By Block”. But that should be the case most of the time.

 324 ECMAScriptFeature RequestLow SVG export depends on GUI Closed
Task Description

SvgExporter.js uses PrintPreview to parse the scale string, and therefore depends on the qt GUI part. That should not make maintenance harder to call RMath directly there? Results seem to match from a first look.

--- SvgExporter.js~	2011-10-20 14:11:45.527589416 +0200
+++ SvgExporter.js	2011-10-20 14:12:46.277502814 +0200
@@ -1,6 +1,5 @@
  * File exporter implementation for the SVG format.
@@ -116,7 +115,7 @@
     this.svgUnitAbbr = ret[1];
     // scale
-    this.scale = Print.parseScale(this.scaleStr);
+    this.scale = RMath.parseScale(this.scaleStr);
     var bb = this.doc.getBoundingBox();
     var size = bb.getSize();
 79 QCAD (main)Bug ReportLow SUSE binary crashes under Fedora Closed
Task Description
  • during the start up
  • last info from splash screen: LibraryBrowser: Directory: metric
./qcad: line 5:  2321 Segmentation fault      (core dumped)
LD_LIBRARY_PATH=/home/martin/opt/qcad-3.0.0-tp1-prof-linux /home/martin/opt/qcad-3.0.0-tp1-prof-linux/qcad-bin $*
(gdb) bt
#0  0x03180194 in __strncmp_ssse3 () from /lib/libc.so.6
#1  0x08c7741e in __xmlParserInputBufferCreateFilename ()
#2  0x04333e04 in xmlParserInputBufferCreateFilename ()
   from /usr/lib/libxml2.so.2
#3  0x043bc9c0 in xmlNewTextReaderFilename () from /usr/lib/libxml2.so.2
#4  0x041fde98 in ?? () from /usr/lib/libgnomevfs-2.so.0
#5  0x041fe381 in gnome_vfs_mime_get_value () from /usr/lib/libgnomevfs-2.so.0
#6  0x041fbb38 in gnome_vfs_mime_get_icon () from /usr/lib/libgnomevfs-2.so.0
#7  0x040d0ab6 in gnome_icon_lookup () from /usr/lib/libgnomeui-2.so.0
#8  0x040d1037 in gnome_icon_lookup_sync () from /usr/lib/libgnomeui-2.so.0
#9  0x0240ee92 in ?? ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#10 0x026a0658 in QFileIconProvider::icon(QFileInfo const&) const ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#11 0x025cd467 in ?? ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#12 0x025c2f89 in ?? ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#13 0x025c3ba4 in QFileSystemModel::index(QString const&, int) const ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#14 0x025c7289 in QFileSystemModel::sort(int, Qt::SortOrder) ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#15 0x025bc86c in ?? ()
---Type <return> to continue, or q <return> to quit---
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#16 0x025c6d68 in QFileSystemModel::qt_metacall(QMetaObject::Call, int, void**)
    () from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtGui.so.4
#17 0x08881dc2 in RFileSystemModel::qt_metacall(QMetaObject::Call, int, void**)
#18 0x02cd3c83 in QMetaObject::metacall(QObject*, QMetaObject::Call, int, void**) () from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtCore.so.4
#19 0x02cdede6 in QMetaCallEvent::placeMetaCall(QObject*) ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtCore.so.4
#20 0x02ce09a0 in QObject::event(QEvent*) ()
   from /home/martin/opt/qcad-3.0.0-tp1-prof-linux/libQtCore.so.4
#21 0x025c07c3 in QFileSystemModel::event(QEvent*) ()
598QCAD (main)Feature RequestLowSupport tangents between ellipsesAssigned
1 Task Description

To add support for drawing tangents between ellipses.

See topic:

 507 QCAD (main)Bug ReportLow Support reversed planes for all entities (currently onl ...Closed
Task Description

See RDwgEllipseImporter::import

 1094 QCAD (main)Feature RequestLow Support OS X 10.9.x (Maverick) Full Screen Pattern Closed
Task Description

It would be nice if the OS X Pro version could support the standard OS X full screen pattern in the same way as native OS X applications.

With this I mean that applications in full screen will create a temporary new desktop as long as they are in full screen mode.

1098QCAD (main)Feature RequestLowSupport for set of layersAssigned
Task Description

Many constructions refer to a basis of elements, which stay constant in all follow-ups. As an example there is a floorplan and I would like to create different variations of room layout (e.g. A and B). In my example the basis consists of 30 layers an each variation needs 10 further ones. At last there are 50 different layers in my drawing. Designing layout A needs layer 1 to 30 (basis) and 31 to 40 (A) to be shown, but 41 to 50 (B) must be invisible. Now I modify Var.B which makes me to single click the visibility of 31 to 40 (A) to be not shown and 41 to 50 (B) to be shown. You’ve got it?

It would be great help, to save the set of all shown layers by an individual name in a pulldown-menu. Visibility of my variations could be chosen by userdefined “set of layers”, e.g. “Var-A”, “Var-B” and “Var-A_but_different”. In this way I pick just one set-name in my pulldown-list instead of marking and demarking between countless layers.

In my opinion this tool would be a small aspect in QCad but a giant leap for user-pleasentness ;-)

693QCAD (main)Feature RequestMediumSupport for external references (XREF)Likely to be implemented
14 Task Description

Support for external references (XREF)

 264 QCAD (main)Feature RequestMedium Support for "Layouts" (paper space, viewport) Closed
25 Task Description

There is one important ACAD feature that I would really like to see supported in QCAD3 and that is “Layouts”

Looking at the block lists, it seems to me that it can’t be too much extra work to support it, since the model space and different paper spaces are already shown there - and one can edit it.

QCAD draws infinitely easier than ACAD and drawing layouts is a primary feature of ACAD. With this in QCAD I can hardly see why anyone that does 2D work would need ACAD at all.

 297 QCAD (main)Feature RequestLow Support drawing linetype scale factor (LTSCALE) Closed
Task Description

Support drawing linetype scale factor (LTSCALE)

1886QCAD (main)Feature RequestLowSupport advanced tolerance settings for dimensionsAssigned
2 Task Description

Add support for
- tolerance display (dimtol)
- upper limit (dimtp)
- lower limit (dimtm)
- tolerance precision (dimtdec)
- tolerance text size factor (dimtfac)
- tolerance suppress zeros, etc.

See also:

 1048 QCAD (main)Bug ReportLow Support "ByBlock" for block attributes Closed
Task Description

E.g. if a block reference has its color set to ‘red’ and the block reference has an attribute with color=’ByBlock’, the attribute should be displayed in red.

1034QCAD (main)Feature RequestLowSupplementary note added to Application preferences dia...Assigned
Task Description

I think it would be useful to add a note to the Application preferences dialog window, to explain to the user the difference between ‘Application and Drawing’ preferences and how it effects drawings in QCAD.

Please see topic for more details and feedback:


1126QCAD (main)Feature RequestLowSuggestion for Dimension Location settingAssigned
3 Task Description

Please seet topic:


 1782 QCAD (main)Bug ReportLow Successive middle mouse button zoom in/out: delay betwe ...Closed
Task Description

I very much like the new middle mouse button zoom in/out and congratulate Andrew for implementing it so quickly but there’s an annoying delay that is necessary between successive zoom in/out actions. This is easily understood by comparing it to zooming in/out with the +/- keys. With the keyboard you can repeat zooms as quickly as the keyboard repeat rate allows; with the middle mouse button quick zooms are not possible.

 476 QCAD (main)Bug ReportLow Stretching dimension Closed
Task Description

Draw a horizontal dimension. Stretch (S S) it. The label remains in place. It should instead go to the new center. (Unless it was manually positioned perhaps...)

Workaround: Pick one extension and drop it to where it was, label gets centered.

 906 QCAD (main)Bug ReportLow Stretch: not working for hatch entities Closed
Task Description

Stretching hatch entities results in broken hatches.
Regression introduced in QCAD 3.1.5, bug still present in 3.2.2.

 945 QCAD (main)Feature RequestLow Stretch tool for blocks ... Closed
Task Description

It would be nice if we could use the Stretch tool also on blocks.

There are so many possibility’s to build a really good (time-saving) block-list /library with preassembled parts but if I have always to explode / ruin the block to use the stretch tool doesn’t helps the productivity.

 350 QCAD (main)Bug ReportLow Strech function of version 3.0.0 Beta does not work (ha ...Closed
Task Description

The stretch function does not work at all. I tried it in the old version 2.2.2 where it worked.

 808 QCAD (main)Bug ReportLow Strange 'jumpy' behavior when closing drawing windows. Closed
Task Description

Test case:

In Windows, set up say 2 or 3 new blank drawings.Then close them down one by one and notice the behavior when closing these drawing windows down!

 398 QCAD (main)Feature RequestLow status bar: avoid scientific display Closed
Task Description

status bar: avoid scientific display of large float numbers

see also:

 619 QCAD (main)Feature RequestLow Status bar - X,Y etc. input fields  Closed
Task Description

It could be very useful to have in the status bar area - input fields for typing in X and Y position, Distance and Angle etc...

For example these could be used instead of entering absolute/relative coordinates in the command line.

1.Draw line.
2.Start point - enter in X Field.
3.Next point - enter in Y Field.

This method could also be used for specifying positions when placing other entities.

For me I tend to use a combination of the command line/GUI for most work but I think for those who do not wish to use the command line this could be useful.

 1935 QCAD (main)Bug ReportLow Startup preferences Closed
Task Description

Startup preferences

On Mac 10.14.6: QCAD Pro → Preferences... → Startup

Check or uncheck “Enable Splash Screen”

1. Restart of QCAD, the splash screen with Initialising add-ons xx% is identical

2. Apply, Cancel and OK buttons - why have both Apply and OK buttons?

 1947 QCAD (main)Bug ReportLow Startup failure Closed
Task Description

QCAD community, Git ba68e28d3d (current HEAD), fresh clean compile on Ubuntu 18.04/x64 (gcc 7.4.0, Qt 5.9.5)

QCAD version
Warning:  QApplication: invalid style override passed, ignoring it.
Warning:  Qt WebEngine seems to be initialized from a plugin. Please set Qt::AA_ShareOpenGLContexts using QCoreApplication::setAttribute before constructing QGuiApplication.
Warning:  action not found: "Scheme"
Warning:  RScriptHandlerEcma::eval: script engine exception:  "TypeError: Result of expression 'RS.getIdealThreadCount' [undefined] is not a function."
Warning:  "<anonymous>(uiFile = 'scripts/Widgets/ViewportWidget/ViewportWidgetQt.ui', graphicsSceneClass = undefined) at /home/ice/w/qcad/qcad/scripts/Widgets/ViewportWidget/ViewportWidget.js:172\n<anonymous>(viewports = [object Object], uiFile = undefined, graphicsSceneClass = undefined) at /home/ice/w/qcad/qcad/scripts/Widgets/ViewportWidget/ViewportWidget.js:75\n<anonymous>() at /home/ice/w/qcad/qcad/scripts/File/OpenFile/../NewFile/NewFile.js:248\n<anonymous>() at /home/ice/w/qcad/qcad/scripts/File/OpenFile/../NewFile/NewFile.js:109\n<eval>() at 1\nslotTrigger() at -1\nopenFiles(args = , createNew = true) at scripts/autostart.js:209\nmain() at scripts/autostart.js:796\n<global>() at scripts/autostart.js:834"
Warning:  RScriptHandlerEcma::eval: script engine exception:  "TypeError: Result of expression 'RS.getIdealThreadCount' [undefined] is not a function."
Warning:  "<anonymous>(uiFile = 'scripts/Widgets/ViewportWidget/ViewportWidgetQt.ui', graphicsSceneClass = undefined) at /home/ice/w/qcad/qcad/scripts/Widgets/ViewportWidget/ViewportWidget.js:172\n<anonymous>(viewports = [object Object], uiFile = undefined, graphicsSceneClass = undefined) at /home/ice/w/qcad/qcad/scripts/Widgets/ViewportWidget/ViewportWidget.js:75\n<anonymous>() at /home/ice/w/qcad/qcad/scripts/File/OpenFile/../NewFile/NewFile.js:248\n<anonymous>() at /home/ice/w/qcad/qcad/scripts/File/OpenFile/../NewFile/NewFile.js:109\n<eval>() at 1\nslotTrigger() at -1\nopenFiles(args = , createNew = true) at scripts/autostart.js:209\nmain() at scripts/autostart.js:796\n<global>() at scripts/autostart.js:834"
Warning:  At least one uncaught exception:
Warning:  "<anonymous>(uiFile = 'scripts/Widgets/ViewportWidget/ViewportWidgetQt.ui', graphicsSceneClass = undefined) at /home/ice/w/qcad/qcad/scripts/Widgets/ViewportWidget/ViewportWidget.js:172\n<anonymous>(viewports = [object Object], uiFile = undefined, graphicsSceneClass = undefined) at /home/ice/w/qcad/qcad/scripts/Widgets/ViewportWidget/ViewportWidget.js:75\n<anonymous>() at /home/ice/w/qcad/qcad/scripts/File/OpenFile/../NewFile/NewFile.js:248\n<anonymous>() at /home/ice/w/qcad/qcad/scripts/File/OpenFile/../NewFile/NewFile.js:109\n<eval>() at 1\nslotTrigger() at -1\nopenFiles(args = , createNew = true) at scripts/autostart.js:209\nmain() at scripts/autostart.js:796\n<global>() at scripts/autostart.js:834"
17:14:39: Debug:    "<global>() at 172"

Then QCAD exits (does not start). As far as I remember, release was fine.

 1802 QCAD (main)Bug ReportLow Startpoint indication disapears for some entities while ...Closed
Task Description

Having a multi selection and at least one ‘older’ arc the startpoint indication in red of some entities might disappear.

Entities that suffer from this are:
Other arcs

Only the ‘oldest’ arc in selection will have a startpoit indication.
Multi selection of ‘newer’ entities from the list above will not if an ‘older’ arc is part of the selection.
Deselecting de ‘older’ arcs will reveal the startpoints up to the ‘oldest’ arc.

In the file provided entities where drew in order from left to right.
Select all and start deseleting arcs from the left.

The behaviour is affected by changing the draw order property and a save/close/open.
In the second file the rightmost arc was set to draw order 7, the same as the 4th was.
After save/close/open it is renumbered to 8 and the behaviour is different as in the firts file.


 582 QCAD (main)Bug ReportLow Standard font from QCad2.2 has to be explicitly set bac ...Closed
Task Description


If you open an old qcad drawing thats DXF and edit text, the popup window shows “Main Font” as empty.

If you do not set the font and complete the edit, it will change the font from the standard to what looks like an Arial font.

If you set the font as “standard” during the edit, each time in future you open the editor it does at least have standard selected.

Ie if no font is specified in drawing, should it not select “standard”?


 530 QCAD (main)Bug ReportMedium sporadic unwanted close of QCad Closed
Task Description

Using the move and scale tools, QCad sometimes (reason unknown so far) crashes in RC4 (never seen that in RC2).

 160 ECMAScriptBug ReportMedium SplitIntoEqualParts.js: Uncaught exception Closed
Task Description
Uncaught exception at scripts/Modify/SplitIntoEqualParts/SplitIntoEqualParts.js:174: Error: :-1:-1: REntity: Argument 0 is not of type REntity *REntity *.
<native>(RLineEntityPointer(0xb73b4c8)) at -1
<anonymous>(op = RAddObjectsOperation(0xb733790), argLine = RLineEntityPointer(0xb73b4c8)) at scripts/Modify/SplitIntoEqualParts/SplitIntoEqualParts.js:174
<anonymous>(op = RAddObjectsOperation(0xb733790)) at scripts/Modify/SplitIntoEqualParts/SplitIntoEqualParts.js:111
<anonymous>(true) at scripts/Modify/SplitIntoEqualParts/SplitIntoEqualParts.js:95
<anonymous>() at /home/martin/workspace/rsframework/scripts/Modify/../EAction.js:1150
<anonymous>() at scripts/Modify/SplitIntoEqualParts/SplitIntoEqualParts.js:73
<global>() at -1
174	        line.copyAttributesFrom(argLine);

qsdb> argLine
 613 QCAD (main)Bug ReportLow Split entities: wrong interpretation of start angle inp ...Closed
Task Description

Split entities: start angle must be entered in degrees * 1rad (converted from degrees to rad twice)


 1141 QCAD (main)Feature RequestLow Split command on Ellipse and Spline curve Closed
Task Description

Would it be possible to use the Split command on Ellipse or on Spline curve?

Now it works on lines, arcs and circles only.......

 926 QCAD (main)Feature RequestLow Splines: break up at point Closed
1 Task Description

Break up spline at given point, break out segment, etc.

1407QCAD (main)Feature RequestLowSplines: add support for knot weights, start-, end tang...Assigned
Task Description

Attached DWG/DXF files are incorrectly read by QCAD.
They contain splines drawn using ZWCAD and saved as DWG/DXF version 2000.
Above splines are polylines created with autolisp routine which converts spline to polyline, so you can see how splines should actually be drawn.

First spline is created with fit points: 2,2 4,4 6,2
Then copied and applied weight of 2 on central control point.
Then copied again and applied weight of 0.5 on central control point.

Second spline is created with fit points: 6,2 8,4 10,2 with vertical start and end tangent.
Then copied and applied fit tolerance of 1 for fit points.

Third spline is created with fit points: 10,2 12,4 14,2 with horizontal start and end tangent.

Fourth and fifth spline are correctly drawn by QCAD.

Link to bitmap (converted to png) export:
External Link

QCAD version:
Date: Mar 17 2016
Qt version: 4.8.4
Compiler version: gcc 4.4.3
Build Date: Mar 17 2016
Architecture: x86_64
OS: Linux
OS version: Unknown

1107QCAD (main)Feature RequestLowSplines: add / remove control points of existing spline...Assigned
Task Description

Tools to add control points to existing splines and remove control points.

 1918 QCAD (main)Bug ReportLow Splines whit control points of order 1 and 4 not select ...Closed
Task Description

Set up a spline with control points let’s say of the order 3.
Clone it 3 times with some offset in x&y.
Edit the degree property and set 1ste to 1, 2nd to 2, aso
Draw select partially from right to left.
Those of the order 1 and 4 aren’t selected.


 1945 QCAD (main)Bug ReportLow Splines saved incorrectly Closed
Task Description

Closed splines (Control points) are saved as “not closed” with a new knot (when DXF is closed and re-opened).
Is this behavious intended ?

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