Two new properties, `ExpandProfile` (length) and `ExpandProfileStepOver` (percent) added for new feature.
New feature converts the normal single offset profile into a compound profile containing multiple increasing/decreasing offsets.
The new feature clears a each layer completely before stepping down to the next layer.
Adjust sorting procedure in PathAreaOp due to `ExpandProfile` modifications to open edges code.
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.
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.
The Path Simulator was designed to handle canned cycle drilling operations, G81, G82, and G83, but it expects the industry standard continuous uninterrupted set of G8x commands until the operation is completed. A recent change to the Path Drilling operation adds commands that cancel each G8x command immediately after that command is used. This confuses the Path Simulation function and leads to visual artifacts when the simulation is performed.
G-code standards say that canned cycle cancellation can be accomplished by a specific G80 command or by any motion command in the set G0, G1, G2, or G3. This PR modifies PathSimulationGui.py to add recognition for canned cycle cancellation and resets the simulator to treat the next G8x command as the first element of a new series of canned cycles operations rather than a continuation of the previous series.
Reduce cumulative error by holding onto the original point in a sequence
of linear optimizations. In testing, this fixes artifacts I have seen on
very finely sampled paths with very gradual curvature.
Further improvements are needed for this optimization, but at least this
change avoids a regression over the status quo.
Slightly clean up the code by separating linear segment optimization
from gcode generation. While the current optimization is not very
effective once there is any kind of meshing noise, having a single
method performing the optimization will make it easier to tweak
tolerances or strategies.
Extend the work from #3496 to allow the safe optimization of more
complex step transitions.
- Use the actual safePDC path for short step transitions and breaks,
currently up to 2 cutter diameters. This value is chosen to cover
basically all typical end step-overs, including those with heavy skew.
Extending this much further (up to the break even point for a retract &
rapid) will need some careful thinking for multi pass paths.
- Coordinate offset tolerances with per-operation tessellation
tolerances, to avoid tessellation artifacts messing up paths by
causing false retracts. Such retracts can cause entire steps near
vertical areas to be falsely skipped, which would cause a major
deviation from the target model. By considering per-job tolerances, we
allow users to safely save computational resources by computing roughing
operations with lower precision, or selectively increase precision for
finish passes.
- Refine the default tessellation tolerance to GeometryTolerance / 4.
This makes sure that the job GeometryTolerance is respected by
operation defaults.
Improvements now identify cases where selected faces create a closed loop that creates an internal closed wire to not be processed.
Remove unnecessary comments.
Add debug statements.
The 0.25 constant used might need to be modified later. Or, the entire `_makeIntersectionTags()` method might need to be improved if other micro-edge use cases cause failure.
Meshing tolerance settings for 3d surface operations were ignored since
switching to directly using facets from the view tesselation. On complex
3d shapes, this could cause serious meshing artifacts in the generated
paths, serious enough to show up even in path previews.
Additionally, there were occasionally segfaults when a model was not
viewed and thus implicitly tessellated before starting an OCL operation.
This patch switches from using view tessellations to explicitly calling
`tessellate()`. While this is usually more expensive than using the
existing view tessellation, recent changes to parallelize tessellation
have reduced this additional cost significantly.
Note that this diff only restores the use of LinearDeflection, since
that is the main thing we care about in OCL use cases. Angular
deflection is still ignored, but I think this is a good thing for this
case since a highly refined mesh in tiny but heavily curved areas below
the linear deflection threshold just adds unnecessary cost. If there is
agreement on this point, then we can remove the preference for
AngularDeflection from the UI in a follow-up.
This feature allows the user to import base geometry from an existing operation in the same Job. The imported geometry is still passed through the shape type filter as if it were manually selected in the viewport.
Path: Post-test updates
Avoid spurious diffs from inadvertent newline changes by letting git
normalize newlines in the path module as well, just as a list of other
modules including Draft already do.
This effectively standardizes all checked-in code to Unix newlines, but
checkouts might use CRLF if that is the user preference.
New option allows access to previously inaccessible faces.
Corrected property label names in UI panel, and added `Face Region` option to boundary shape list.
