planex2d

About

  • Installation
    • Optional packages
  • API conventions
    • Chaining and copies
    • Reading the arguments
    • Points
    • Planes
    • Angles and units
    • Queries
    • Errors and warnings
  • How planex2d is tested
    • Tests written by hand
    • Agentic testing
    • Fuzz tests
  • Building and contributing
    • Requirements
    • Build
    • Tests
    • Contributing
  • How AI is used in this project
    • Development
    • Documentation
    • Testing
  • License and notices
    • Eigen 3.4.0
      • Licenses of the Eigen files planex2d compiles
    • pybind11
    • Taskflow 4.1.0
    • Libraries planex2d uses but does not include
    • Packages planex2d imports when they are installed
    • Data files under other licenses
  • Roadmap
    • Installation
    • Kernel
    • Sketch
    • Constraints
    • Measuring
    • OpenCASCADE
    • Files and integrations
    • Experimental

Core

  • Basics
    • Objects
      • Objects in planex2d
      • Lines and arcs
      • Splines
      • Wires and faces
      • Faces, shapes and compounds
    • In space
      • The plane in 3D
      • Moving, rotating, mirroring, scaling
    • Data
      • Names and colors
      • Units
      • Tolerances
    • 3D
      • Pad and Pocket
  • Plotting
    • General
      • matplotlib
      • plotly
      • SVG
      • Marking edges
      • In 3D
    • Sketches
      • Sketch plots
    • Measurements and fields
      • Measurements
      • Fields
    • Everything at a glance
  • Quick sketch
    • Drawing
      • Sketch or QuickSketch
      • Lines and arcs
      • Circles and rectangles
      • Slots, keyholes and polygons
      • Splines
      • Several loops
    • References
      • To, from and until
      • Parallel, perpendicular, angle
      • Tangents
      • Arcs from references
      • Choosing between solutions
      • Construction elements and points
      • Automatic ids
    • Editing
      • Fillets and chamfers
      • Extending edges
      • Offsets
      • Trimming and splitting
      • Symmetry
    • Placement
      • Placing a sketch
    • Design
      • Parametric design
    • Everything at a glance
  • Constraint sketches
    • Constraining
      • Drawing with constraints
      • Converting sketches
      • Constraints and dimensions
      • Fully, under- and over-constrained
    • Changing the design
      • Changing dimensions
      • Expressions: design rules
      • Formulas: a dipstick for a tank
    • More geometry
      • Symmetry and patterns
      • Splines
      • Trim, split and project
      • Offsets and profiles revisited
    • Beyond drawings
      • Mechanisms: the sketch as a solver
  • Booleans
    • Two faces
      • Three operations
      • Union
      • Difference and intersection
      • Names are kept
    • Many faces at once
      • A perforated sheet
      • A Reuleaux triangle
      • A stress test
    • Faces and wires
      • A truss from its member center lines
      • Glued, the members stay separate
      • Overlapping stretches are kept once
    • Splitting and trimming
      • A segmented ring
      • Trimming a blank
      • Closed cutters punch holes
      • Wires
      • Cutters from 3D
      • The rules
    • Traces and pads
      • Check
      • Pads and drills
    • Everything at a glance
  • Measuring
    • Measurements
      • Areas, centroids and second moments
      • Boxes, crossings and open ends
      • Distances and clearances
      • Inside or outside
      • Dimensions in a sketch
    • Analysis
      • Part analysis
    • Everything at a glance
  • Files
    • DXF
      • A gasket drawing
      • Polylines with arcs
      • Units
      • Gaps
    • STEP and BREP
    • SVG
    • shapely
    • KiCad
    • gmsh
  • Defeaturing and simplification
    • Small gaps
      • A square that does not close
      • On export and when reading
    • Small edges
      • A step of 10⁻⁵
      • On export
    • Collinear lines
      • A bottom in four pieces
    • Fitting arcs
      • A measured bore
      • Tolerance
      • On export
    • Fitting splines
      • An ellipse from 128 segments
      • Arcs first
    • The steps, in order
  • Comparison with other libraries
    • Union of many discs
    • Union of traces
    • Merging split edges
    • Nearly coincident edges
    • Gluing many faces

Integrations

  • OpenCASCADE
    • Export
      • To OCC shapes
      • Export options
      • Splines as arcs
    • Modeling
      • A C-clamp, step by step
      • Sketching on and projecting 3D geometry
      • Lofting sections
      • Lofts with guide curves
    • Everything at a glance
  • netgen and NGSolve
    • Getting started
      • Coming from netgen's WorkPlane
      • Naming and marking
      • Identifications
    • Meshing and fields
      • Meshing a face
      • Fields and cuts
      • Solids and meshes in the webgui
      • Field solvers as measurements
      • From level sets
  • gmsh and FEniCSx
    • A minimal example
    • A trimmed resistor
    • The mesh
    • The resistance
    • Drawing the result
    • More
  • shapely
    • A minimal example
    • To shapely
    • Predicates and distances
    • From shapely and back to arcs
    • Line strings
  • SciPy
    • A minimal example
    • A dimension from a requirement
    • Optimizing a cold plate
    • Fitting a sketch to measured points
    • At a glance
    • In 3D
  • PyTorch
    • A minimal example
    • The plate and its two measurements
    • The baseline: COBYLA from the regular grid
    • 40 layouts that fill the space
    • The surrogate
    • Search the model, solve the winners
    • Polish the winner
    • More
    • In 3D
  • KiCad
    • A minimal example
    • A real board
    • Both copper layers
    • What the board looks like
    • Copper per net
    • A clearance check
    • The board in 3D
    • Writing a board
    • Boards from other programs
  • NumPy
    • A minimal example
    • Arrays in
    • Arrays out
    • A million points at once
    • More

Examples

  • Machines and vehicles
    • Toy plane
    • Model rocket
    • Rear wing with DRS
    • Suspension kinematics
    • Excavator arm
    • Spur gears under load
    • Planetary gearbox
    • Wankel engine
    • Idler plate
  • Mechanisms
    • Four-bar linkage
    • Hood hinge
    • Jansen linkage
    • Straight-line linkages
    • Geneva drive
    • Cycloidal drive
    • Belt drives
    • Drilling a square hole
  • Physics
    • Isospectral drums
    • Boat stability
    • Flow through sand
    • Solar shading
  • Fields and simulation
    • Surface magnet motor
    • Heat sink
    • Hilbert heater
    • Parallelogram flexure
    • Vivaldi antenna
    • Patch antenna
    • Voronoi bone
    • Lens ray tracing
    • Airplane windows
  • Manufacturing
    • Gear cutting
    • Pocket milling
    • A slicer for 3D printing
    • Laser-cut box
    • Stencil lettering
  • Geometry and design
    • Penrose tiling
    • Rose window
    • Path planning
    • The moving sofa
    • Prince Rupert's cube
    • The coastline paradox
    • Drawing a logo

Experimental

  • Deformable shapes
    • Displacements and topology changes
      • Moving the hole up
      • What happens at a topology change
      • Results
    • Displacements from NGSolve
      • A harmonic extension
      • In motion

API

  • API reference
    • Geometry
      • Edges and wires
      • Faces, shapes and compounds
      • Planes
    • Sketches
      • Constraints and dimensions
      • References
    • Boolean operations and transformations
    • Selections and views
    • Files and other libraries
    • OpenCASCADE and netgen
    • Plotting
    • Measurements
    • Units, settings and warnings
    • Experimental
planex2d
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