tangorsketch
M1 · in development

Tangor Sketch

Parametric driven sketching for technical layouts.

A 2D drawing program in the spirit of a CAD sketch environment: every line, arc and point is driven by constraints and named parameters. Change one dimension and the whole drawing follows. It's built for technical drawing, laser cutting and CAD sketching.

Try it in your browser See what it does

A development preview, rebuilt from the latest code. Nothing to install, and your sketches stay on your computer.

Features

Precision you can edit

Dimensions and relationships are part of the drawing, not notes on top of it.

Constraints

Geometry that holds its shape

Coincident, tangent, parallel, perpendicular, equal, symmetric, distance and angle constraints keep a sketch exactly as designed while you drag it.

Parameters

Named values and expressions

Drive dimensions from a parameter table with units (mm, in, deg), functions and conditionals, then resize a whole part by changing one number.

Export

True-scale SVG and DXF

Send drawings straight to a laser cutter or into other CAD tools at exact size.

Tools

The sketching basics

Lines, rectangles, circles, arcs, polygons and slots, plus fillet, chamfer, trim, extend and full undo/redo.

Everywhere

One engine, every screen

The core is written in Rust and compiled to WebAssembly, so the desktop app, the browser and future tablet builds share the same engine.

Open

Plain files and a command line

Sketches are saved in the readable .tangor format, and the sk tool validates, solves and exports them without the editor.

Constraint status

See what's locked down

The solver counts the degrees of freedom left in a sketch and colors every element by its state, so you can tell at a glance what still needs a dimension.

Fully constrained

Locked down by parameters, drawn in Paper White.

Under-constrained or active

Still free to move, or being edited, glows Vivid Tangerine.

Construction geometry

Alignment-only lines are dashed Muted Slate and never reach the laser.

Command line

Scriptable from day one

Check a drawing, list its parameters, or export a variant with different values, all without opening the editor.

# structure, parameters, does it solve?
$ sk validate plate.tangor
# export a 60 mm wide variant as true-scale SVG
$ sk export plate.tangor --set width=60mm -o plate-60.svg
# true-scale DXF for the laser
$ sk export plate.tangor --format dxf
Roadmap

Where it's headed

Built in milestones, each one usable on its own.

  1. M0 · SolverConstraint solver and drag benchmark, native and in WebAssembly.
  2. M1 · First usable sketcher (now)Drawing tools, parameter table, save and load, SVG and DXF export, macOS desktop and web.
  3. M2 · Laser-readyLayers, styles and fills, profile detection, kerf offset, configurations and CSV parameters.
  4. M3 · Multiple sketches and importsProjections, DXF, SVG and image references, splines, ellipses, offset, mirror and patterns.
  5. M4 · Drafting and textSheets, annotation dimensions, PDF output, and outline and single-stroke text.
  6. M5 · Scripting and tabletsGenerators and macros, version history, iOS and Android.