Change Log

All notable changes to this project will be documented in this file.

[Unreleased]

[0.5.0] - 2022-04-26

Added

• Added support for Mac OS X (Monterey 12.3) 3b4103bf2e01f3e7175adcf0f1bed5a429bad361

• Added the Support Module: pyslm.support 9ee1f6668b56e76137c3dade178dc837460fc056 0f6e29815a5d6a65789d27c49131d49486415d31

  • Added generic abstract class support.SupportStructure for providing the generic infrastructure for defining support structures (e.g. block, grid, tree) and common methods

  • Introduced Various Classes - BaseSupportGenerator and BlockSupportGenerator for Generating BlockSupports

  • Introduced support.geometry.extrudeFace method for extruding block faces with variable height

  • Introduced method support.geometry.triangualtePolygonFromPaths to triangulate polygons generated in the Support Module

  • Introduced a method support.render.projectHeightMap for projecting height/depth maps using OpenGL to calculate the depth map for projecting supports

  • Introduced classes GridBlockSupport, GridBlockSupportGenerator and associating mapping function for generating polygon truss grid supports

  • Introduced classes for identifying and generating conforming support volume

  • Self-intersecting support volumes are generated via the pycork library e438bef493553b18dd1ee5031a226d04b63a5c67

• Added point delay and jump speed in pyslm.geometry and these are used in calculations performed in pyslm.analysis 55cc7e79c9e6f1f5f8b25d38dd6a48639b422fd2

Fixed

• Fix pyslm.analysis tools to use jump speed and jump delay parameters 3bce788b5362062755e0fb7f17757b4174d1e877

• Fixed plotSequential showing an invalid scan vector at the end of the contour scanning c46ae70980ac652d30ce7e3a2aa6667246752744

• Fixed the offsetting applied to contour/border scans. An overall offset is not applied if a contour scan is not used 40fb789164aa76e25222e1c822e3462eb1c6fd82

• Updated compatability for Python 3.9 01f79a6dcfb9625d05e3d12a5b1901d32324c7ca

• Updated examples 639e042575e019d3b3d6f3a6272cb5f140f45606

Changed

• Added soft dependency for PyQt5 in the dependencies needed for support generation 2ced797da62f9b8099c8c9f30c4ff7c6677b2b6d

[0.4.0] - 2021-07-23

Added

• Added example_laser_iterator.py for demonstrating the basic use of the iterator class 0f26f4a4aa33d80769d9713157e8b675cb48a862

• Added example_parametric_study.py for showing how create a design of experiment study 54dfca913b23ad71b025f5eec646f5f896b605b8

• Added fixGeometry option added to repair polygons generated following slicing

• Added various modes for polygon line simplification - including absolute and ‘line’ based on the mean edge length in the polygon. 4e6bf23cccb4ac091d44381649a11288ce495033

• Added a simplification tolerance based on relative or absolute tolerance for contours 078cc554bba4c22ce1a36f682b401fb72d59f335

• Added a method visualise.plotSequential to plot LayerGeometry in sequential order with jump vectors 4a0cd56c21e35ee09ec8afdc408471e8211d057d

• Added an option to modify order of scanning for hatch and contour scan vectors using Hatching.scanContourFirst property. 1120ee5b041dd0cdc9eb35f507d4ba13aa9ff02e

• Added a sort method - UnidirectionalSort class, that simply provides a pass through method to not modify scan vectors 0f2304f5f58612ca619e3f94276d38b6d85fe5e8

• Added a sort method - FlipSort class, that flips the scan vectors 6d4c77984a25d80e9c4061860416fd75804a476f

• Added an Iterator Module (analysis/iterator.py) for processing through the LayerScan Geometry. Various supporting classes are used for efficiently parsing across the Layer and associated Layer Geometries. This includes several classes including

  • (Iterator - base class

  • LayerGeometryIterator - Iterate across LayerGeometrys

  • ScanVectorIterator - Iterate across individual Scan Vectors

  • ScanIterator- Incremental position at a fixed time

• Added property Part.extents, Part.getProjectedHull and Part.getProjectedArea 4d8747fa3083c2005df8ddf6817db2f4102b84f2

• Method for visualising convex polygons from Shapely or ClipperLib, using Matplotlib.patches. This cannot be visualise polygons with holes - these are treated as boundaries 1bbf60298c634ea918d354f45c979aff3f4bedcc

Changed

• Contour scan vectors are scanned following hatch vectors by default 1120ee5b041dd0cdc9eb35f507d4ba13aa9ff02e

Fixed

• ModelValidator uses LayerGeometry’s Model Id is used for finding the associated Model 76587c58b7240822ea3b6314a404137af3342509

• Contour offset is correctly generated 8b37f5a37520b5abbace9f24e629826a3326e8bb

• (BUG FIX) Final scan vector is correctly flipped e935217f13dceda55f1f514f7c8cbdac852024df

• (BUG FIX) Remove debugging messages during Layer Generation fe9c31dacc8ce95d09999acd7ef83db4ff70669f

[0.3.0] - 2021-02-20

Added

• Added BaseHatcher.boundaryBoundingBox() to obtain the bounding box of a collection of polygons - returned internally from PyClipper

• Added a simplifyBoundaries() in hatching/utils.py to simplify polygons (shapely and raw coordinate boundaries using scikit image) -hatching.generateExposurePoints() now generates for ContourGeometry

• Added ModelValidator class in pyslm.geometry.utils to verify the input of build files generated prior to exporting in libSLM - e75b486c090b4ead712d2ddb950577e058c419e6

• Added example_exporting_multilayer.py showing how to export a multi-layer build using libSLM - 52090085fd52336e2cc2181ff886a8aebbdca1ef

• Added example_custom_island_hatcher.py showing a method to create customised island scan

• Added a HexagonIsland Class to demonstrate custom implementation of island regions

• Added example_build_time_analysis.py to show the processes of estimating build-time

• Added example_custom_sinusoidal_hatching.py for showing custom hatch-infills - c7c1a4304dd4f2a4cdf0286385ccb68d3968ba5e

• Added a method BaseHatcher.clipContourLines for clipping open scan paths to fill a region

• Added an analysis method utility getBuildStyleById to find the BuildStyle given a model id and build style id

• Added a method in plotLayer to visualise the scan vector properties (e.g. length)

• Added properties for geometry class to be compatible with libSLM 0.2.2 - providing multi-laser compatibility

• Added the method Part.getTrimeshSlice to get a trimesh.Path2D slice from the geometry - bb2ebb9c4514a05cc1728c810deef7fc6c3239e4

• Added a method to find the ‘inverse’ projection of support faces

• Added visualise.visualiseOverhang for showing overhang regions

• Added geometry.utils.ModelValidator for validating the build inputs (layers, models) when exporting to a machine build file

• Added a .gitignore file - 498d9116dd9d91698695669d5d1309a7941e0dd9

Changed

• Internally generateHatching() and hatch() in subclasses of BaseHatcher to generate the internal hatch geometry to use multiple boundaries to ensure that the subregion generation sorting covers the global region.

• Internally BaseHatcher.boundaryBoundingBox() is called instead of BaseHatcher.polygonBoundingBox()

• Removed the for loop which previously iterate across boundaries.

• Updated IslandHatcher to use this behaviour

• Updated BaseHatcher to use static members where possible

• Analysis method analysis.getLayerTime requires a Model list

• Analysis methods use point exposure time and distance using analysis.getLayerTime

• Removed debug messages when visualising layers

• Fixed import of submodules in PySLM - 66f48fd9929d244b836583f24c087602cdc31a96

Fixed

• Fixed LaserMode, LaserType Enums to be compatible with libSLM - 52090085fd52336e2cc2181ff886a8aebbdca1ef

• Jump distance between LayerGeometry is accounted for in the Analysis Submodule

• Fixed visualisation of PointGeometry exposures - 135bed81bb57b867f2499311bacd7ad2d7aa67d9

• Updated Documentation across the project

[0.2.1] - 2020-06-19

Fixed

• Fixed the setup.py source tarball to include the PyClipper extensions.

[0.2.0] - 2020-06-17

Development branch of PySLM with new features.

Added

• Added transformations to the Part class so that these can be translated, rotated, scaled efficiently on demand

  • Updates on the geometry are cached when geometry method is called.

  • Method included to drop the part to the platform

• Added an enhanced version and higher performance of generated clippable island regions.

  • Introduced InnerHatchRegion in the hatching submodule

  • Introduce IslandHatcher which re-implements the Island/Checkerboard Scan Strategy

• Added a method to alternate adjacent scan vectors in the hatching module

• Added a method to generateExposurePoint method in the hatching submodule to create exposure points from scan vectors

• Added a Geometry Submodule in pyslm.geometry

  • libSLM Python Extension Library is used if available

  • A set of native compatible Python classes are available if libSLM is not available

  • Classes include:

    • Layer

    • LayerGeometry

    • Model

    • BuildStyle

    • Header

    • HatchGeometry, ContourGeometry, PointsGeometry

• Added an Analysis Module in pyslm.analysis:

  • Total length of all the scan vectors across a layer

  • Total jump length between scan vectors across all vectors

  • Total scan time across a layer

• Added a method to generate bitmap slices from a single image is included in Part

• Added a Visualise Submodule in pyslm.visualise

  • Introduced a method to visualise a collection of shapely polygons

  • Introduced a method to generate a heatmap based on a set of exposure points in a layer

  • Introduced an updated method to plot layerGeometry

    • Plot scan order

    • Plot arrow direction

    • Plot the layers correctly in 3D

• Introduced several new examples:

  • 3D slicing example - example_3d.py

  • Multi-threading example - example_3d_multithread.py

  • Island hatching example using new implementation - example_island_hatcher.py

  • Bitmap slicing of parts - example_bitmap_slice.py

  • A heat-map/exposure map visualisation - example_heatmap.py

Changed

• Part.getVectorSlice method by default returns a list of coord paths

• Part.getVectorSlice now returns a list of Shapely.geometry.Polygon if optional argument is passed

• hatching.IslandHatcher in the previous release is changed to BasicIslandHatcher

Fixed

• Further changes and improvements to the overall documentation.

• Updated requirements.txt to ensure documentation can correctly build on readthedocs

[0.1.0] - 2020-05-08

The first release of PySLM in its distributed packaged form via PyPi. This release includes basic slicing and hatching using a custom version of PyClipper built internally using setuptools.