AS the title says - when exporting closed curves (ellipses for example)
as polylines with the "Treat ellipses and splines as polylines" option,
the generated DXF file contained duplicate vertices. For example, an
ellipse polyline would have vertex1 and vertex40 which are identical in
terms of coordinates. This has caused exception upon importing.
Cause of that was that discretizer was blindly iterating through all
discretized points without checking if the first and last points are
coincident.
So, this patch adds a check for that to detect and skip the last
coincident point if it is in fact coincident during Export.
Currently if users enabled the "Treat ellipses and splines as polylines"
option in DXF export preferences and exported them, they were still
being exported as native primitives.
This was because we were reading from a wrong preferences location, UI
stored it in `BaseApp/Preferences/Mod/Draft`, but it was read from
`BaseApp/Preferences/Mod/Import`. Since the pref didn't exist, we were
taking default value which was set to `false`.
So the solution is obvious - just set it to the correct path.
"Professional CMake" book suggest the following:
"Targets should build successfully with or without compiler support for precompiled headers. It
should be considered an optimization, not a requirement. In particular, do not explicitly include a
precompile header (e.g. stdafx.h) in the source code, let CMake force-include an automatically
generated precompile header on the compiler command line instead. This is more portable across
the major compilers and is likely to be easier to maintain. It will also avoid warnings being
generated from certain code checking tools like iwyu (include what you use)."
Therefore, removed the "#include <PreCompiled.h>" from sources, also
there is no need for the "#ifdef _PreComp_" anymore
* Import: DXF importer, block and inserts overhaul
Implement support for blocks as definitions and inserts
as instances.
A BLOCK definition becomes a hidden master object in a
_BlockDefinitions group (currently a Part::Compound).
An INSERT becomes a visible App::Link that points to
that master definition.
* Import: DXF parser/importer add debug print statements
* Import: DXF importer, various improvements
- Add more code comments
- Correctly increase object count
- Improve readability of anonymous block checks
* Import: DXF (all) report anonymous blocks separately
* Import: DXF importer (App + GUI) add nested inserts support
* Import: DXF importer (GUI) fix preserving colors for inserts
* Import: DXF importer, make primitives naming more specific
* Import: DXF parser/importer remove debug print statements
* Import: DXF parser, work around DXF color index 7
* Import: DXF importer GUI, temporary debug print to show layer color data
* Import: DXF importer, fix nested inserts hierarchy
* Import: DXF importer, prefix and suffix underscores to names
To work around mangling from FreeCAD's unique name generator.
* Import: DXF importer, implement flattening blocks on import
* Revert "Import: DXF importer GUI, temporary debug print to show layer color data"
This reverts commit b6ece395c9d2b8a1e0796d6f7b0d58842a2f3686.
* Import: DXF importer, fix imported text orientation
The DXF file provides the text rotation angle in degrees.
The used rotZ function expects the angle in radians,
thus the conversion needs to be made.
Fixes: #21548
* Import: DXF importer, honour the preference to not import layouts
* Import: DXF importer, move unreferenced blocks to separate group
This provides better classification, but it has a performance hit:
we import all blocks as before, we sort them and we reparent them
to the correct group. The reparentipart with Grou.setValues()
appears to be an expensive call. Probably because internally the
FreeCAD dependency graph is modified.
* Import: DXF importer, count compound children in the report
* Import: DXF importer, cleanup defined blocks group if empty
Now for unsupported features we report on line numbers and on the entity
handle, in case that unsupported feature is a DXF entity. To avoid
flooding the output, only a maximum of 5 instances are reported with
details. The rest simply add up to the global count and are ellipsized
in the report.
Report output is now in sentence case.
* Add a test case for DXF import
* Test gui flag rather than look for import error to make gui decision
The new code is cleaner and faster and avoids any exception stuff
* Properly avoid trying to use Layer's View object in non-GUI
The code was trying to avoid this but had a Python None object rather than a null C++ pointer and so tried setting a property on None. This left an unhandled exception state which acted as a booby trap that caused the later failure of some unrelated code.
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* De-lint, remove wong "unsupported" message
Hidden layers have been supported for a while but still generated an import note about this being unsupported.
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Every basic data type is stored in Base module, color is standing out as
one that does not. Moving it to Base opens possibilities to integrate it
better with the rest of FreeCAD.
* Fix double-import on exception in ImportGUI.readDXF
The python code has a try/catch block intended to detect if the ImportGUI module is present and if so use its readDXF method, otherwise use Import.readDXF.
The block was incorrectly structured so that Import.readDXF would also be called if ImportGUI.readDXF raised an exception, causing the DXF file contents to be loaded twice into the drawing (at least, up to the point where the exception occurred)
* Make ImpExpDxfRead::MakeLayer use centralized accessor for Draft module
The importer class already had a method to find the python Draft module, but MakeLayer was doing the work itself. Now it uses the centralized accessor, which has also been improved to generate a message if the module can't be loaded.
* Give compounded objects names related to the containing layer name
If "Use Layers" is set and also "Group layers into blocks" the names of the generated compound objects will be based on the name of the containing layer.
If "Use Layers" is not set this will not occur because in general objects from several layers would be compounded together.
Fixes (partially) #16068, the remaining fix is likely just an explanation of the interaction of the options.
closes#13597
* Use correct (new) property name OverrideShapeAppearanceChildren
This corrects a bug created by commit 495a96a which renamed the layer property "OverrideShapeColorChildren" to "OverrideShapeAppearanceChildren" but missed this particular reference to the property by its old name.
The code here called PyObject_SetAttrString which, due to the wrong attribute name, set an expection state in the Python engine, ultimately causing the next attempt at importing a module to fail, with various consequences depending on why the module is being imported.
* Wrap PyObject_SetAttrString and PyObject_GetAttrString with error-checkers
In DEBUG compiles these methods are wrapped to report errors which can occur if the property cannot be referenced.
* Make some error-printers static instead of const
They don't need the CDxfRead object to work
* Display exceptions raised by ReadEntity
Although the DXF reader has an ignore-errors flag, it should still report any errors it encounters. The flag is deemed to mean that, after an error, the reader should continue to try to read the file rather than quitting on the first error.
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* Place objects in layer all at once rather than one at a time.
This reduces (by a factor of the number of objects in the layer) the number of times that the layer contents are traversed to set the properties of the contained objects.
This means the layer insertion of O(n) rather then O(n^2) on the number of objects.
Also remove a loop invariant in view_layer so the chidren are not traversed if colours or appearnces are not inherited from the layer.
Fixes#15732
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Fixes#11873 this was the primary goal of these changes
Fixes (partially) #11874 the parts of a polyline are combined as a
compound object (shape) but it would be preferable for them to be made
into a wire (if possible)
Fixes#11872 Objects in a block definition are now kept separately
until the block is inserted, in which case the inserted objects are
subject to all the other options regarding combining.
Fixes (partially, review required) #11871 Text and dimensions are now
kept as part of the block definition and are placed in the drawing when
the block is inserted but this code has not been extensively tested.
Affects #11875, custom types are not made, but the labels now reflect
the object types rather than all being "Shapennn"
This leaves the importer options handling in a bit of a mess that needs
cleanup eventually, but this can be a new issue.
This includes some importer flags that have no corresponding options
(e.g. import frozen layers), some flags not yet implemented, some
flags not yet even declared in the code because their implementation
is further off (import hatch outlines), and some suggested future
options (import SOLIDs as faces)
Centralize the calculation of the OCS for entities as they're read
from the DXF. Most of the entities don't use this yet, but some of
them roll their own crude Normal Vector handling. Because the new
code takes priority over the old for reading the normal vector, such
code will always see (0, 0, 1) as the extrusion direction.
