Implement an iterative version of the Ramer-Douglas-Peucker line
simplification algorithm
(https://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm),
which reduces line complexity to a limited linear deviation from the
original polyline. The ability to reason about linear deflection is the
key improvement over the previous linear implementation.
Worst case complexity is O(n^2), but expected complexity for typical
cases is O(n log n). A potentially faster alternative would be to call
out to libclipper, treating the line as a closed polygon. However, in
practice, performance of this implementation seems good enough. A
complex 3d surface operation optimizes in a few seconds, and reduces
output gcode size from about 220MB with the previous implementation to
10MB.
At the moment the user must manually modify `FirstAngle`
and `LastAngle` to obtain a new `Angle`, but since the values
are manually entered the result is not tied to any actual object
in the document.
We introduce a function `measure_two_obj_angles`
to calculate the corresponding parameters from a pair of objects
and their edges.
Currently this function is deactivated because it is intended
for testing purposes only.
This needs to be improved because at the moment it only gives
two possible angles. We should be able to get the four angles
of a two-line intersection. Maybe a new property is required
to indicate the quadrant to choose and display.
Instead of placing the entire code in the `execute` method,
we use three medthods to extract the `Start` and `End` dimension
points from different combinations of edges.
One method to get the dimension from a single object, from the edge,
either linear or circular; one method to get the dimension
from a single object, from two vertices; one method to measure
the distance between two objects, from two different vertices.
There are three classes `DimensionBase`, `LinearDimension`, and
`AngularDimension`, their properties are set only if they don't
already exist.
Provide also better documentation in the tooltips,
and use `setPropertyStatus` to hide and show the intended
properties in the property editor.
The `Support` property is not used at all except as a way to
store an object, so it should probably be removed in the future.
A single `make_dimension` handles three types of dimensions,
(1) simple linear, (2) linear linked to an object, and (3) linked
to a circular edge.
So, we provide a new function, `make_radial_dimension_obj`,
to handle the third case. In this way we can check the input
parameters much better.
We adjust the `Draft_Dimension` Gui Command accordingly.
A single `make_dimension` handles three types of dimensions,
(1) simple linear, (2) linear linked to an object, and (3) linked
to a circular edge.
So, we provide two new functions, `make_linear_dimension`
and `make_linear_dimension_obj`, to handle the first two cases.
In this way we can check the input parameters much better.
We adjust the `Draft_Dimension` Gui Command accordingly.
Previously the `make_dimension` and `make_angular_dimension`
functions were in `draftobjects/dimension.py`.
Now they are moved to `draftmake/make_dimension.py`.
The original `makeAngularDimension` function requires angles
in radians which is counterintuitive for most cases. Also
the order is `[big, small]`.
The new function `make_angular_dimension` accepts angles
in degrees, and the order is `[small, big]`. The older
function is retained for compatibility purposes.
Also perform several improvements such as PEP8 cleanup,
writing complete docstrings, type checking the input arguments,
and depreacting the older call.
The `Draft.py` module, Gui Command, unit test, and test script
are updated accordingly.
The new `ShapeName` is the name of the FreeCAD shape file containing the 3D body of the cutter.
We might want to change the source of the `ShapeName` to the name of the first Body object in the shape file, rather than the name of the file itself.
This commit just syncs with the pattern of TechDraw:
- add further patterns
- save all patterns as plain SVG (strictly following thee SVG specifications) using Inkscape 1.0
Before, the `make_label` function had a `target` parameter
that had to be a `LinkSub`, `[Part::Feature, "Edge1"]`.
However, it is easier to pass the individual components
separately using two parameters, `target_object` and `subelements`,
which can then be assembled into `[target_object, subelements]`.
The second element is optional, so it can be set to `None`,
and then the second element will be converted to an empty list,
`[target_object, []]`, as required by the Label's underlying `Target`
property.
When `LabelType` is `'Custom'`, the `Target` property
is hidden and `CustomText` is shown.
For other values of `LabelType`, `Target` is shown,
and in turn `CustomText` is hidden.
This avoids showing unused information in the property editor.
We use smaller functions to return a list of strings corresponding
to each basic value of `LabelType`. Then the final `Text` value
can be defined as a simple value, or as the concatenation
of two smaller lists, depending on the value of `LabelType`.
Since we have 8 basic values, we could return up to 8^2
combinations, but at the moment we only return 8 basic
values and 5 simple combinations, which are the ones
that make the most sense.
In the future we could define new properties, say, `LabelType2`
and `LabelType3`, to be able to combine two or three types
of strings in an arbitrary fashion. At the moment, the possible
combinations are hard coded in `LabelType`.
Instead of placing the entire code in the `execute` method,
a `return_info` function is used to return the specific string
that we wish to display depending on the `Target` object,
the `LabelType`, and subelement in `Target`, if any.
We also make the code more readable by using smaller variables,
and avoiding notations with lists of lists (`variable[0][1][6:]`).
There are three general types of properties, target, leader,
and label; so we set the 9 properties using three functions,
and provide better documentation in the tooltips
for each property.
Also perform several improvements such as PEP8 cleanup,
writing complete docstrings, type checking the input arguments,
and deprecating the older call.
Update `Draft.py`, the Gui Command, the unit test, and test script
as well.
