NeoGeoSolver

This project provdes a geometric constraint solver for CAD systems as a set of reusable C# components.

Prerequisites

• .NET 7

Optional

• Docker

Getting started

# clone repo
$ git clone https://github.com/TrevorDArcyEvans/NeoGeoSolver.NET.git

# build
$ cd NeoGeoSolver.NET
$ dotnet restore
$ dotnet build

# run tests
$ dotnet test

# run UI
$ cd NeoGeoSolver.NET.UI.Web
$ dotnet run

open NeoGeoSolver.NET

Docker

$ docker build -t neo-geo-solver .
$ docker run -p 5051:80 neo-geo-solver

open NeoGeoSolver.NET

Supported constraints

• arc circle concentric
• arcs concentric
• arc radius
• arcs equal radius
• arc circle equal radius
• points coincident
• points distance
• points horizontal
• points vertical
• point on arc
• point on circle
• point to line distance
• point to point vertical distance
• point to point horizontal distance
• point to line vertical distance
• point to line horizontal distance
• point on midpoint of a line
• point on midpoint of an arc
• point on a quadrant point of a circle
  • +x (parameter = 0)
  • +y (parameter = 1)
  • -x (parameter = 2)
  • -y (parameter = 3)
• circles concentric
• circle diameter
• circles equal diameter
• lines collinear
• line length
• lines equal length
• line tangent to arc
• line tangent to circle
• angle (between two lines)
• line horizontal
• line vertical
• lines parallel
• lines perpendicular
• equal value (might be useful?)

Unsupported constraints

all done for the moment

Further work

• change arc definition to centre-radius-start_angle-end_angle
• implement unsupported constraints
• remove unused constraints
  • tangent (use line-entity distance with zero distance)
  • point on (use point-entity distance with zero distance)
  • points angle
• remove unused entities
  • function (no docs + not normally used in CAD)
  • spline (no docs + not normally used in CAD)
  • ellipse + ellipsearc (not normally used in CAD)
• more unit tests for solver
  • multiple constraints
• portable UI aka test harness
• support Docker
• document solver internals

Further information

• Geometric constraint solving - Wikipedia
• Sketchpad
• A Geometric Constraint Solver
• Modelling of Geometric Constraints in CAD-Applications
• Interactive 2D Constraint-Based Geometric Construction System
• Geometric Sketch Constraint Solving with User Feedback
• OpenCSM: An Open-Source Constructive Solid Modeler for MDAO
• SolveSpace - parametric 3d CAD
• Geometric Constraint Solving
• imuli/geosolver-python
• SketchSolve.NET

Acknowledgements

This repository was forked from BimCAD which in turn was forked from NoteCAD; which I suspect was based on geosolver-python