Cadjitsu 1.3.0

Cadjitsu 1.3 turns photos into parts: put a photo on a plane, correct its lens and perspective, and trace the part into a sketch at true size. It also brings Revolve and Shell, and the everyday sketch tools Trim, Extend, Fillet, Slot and Polygon. AI agents can now do all of it too: they see the photo with a millimetre grid, trace it and add your caliper measurements.

Downloads

File	For
Cadjitsu-1.3.0-macOS.dmg	macOS 15 (Sequoia) or later on Apple Silicon
Cadjitsu-1.3.0-Linux-x86_64.tar.gz	64-bit Linux with X11 and OpenGL

macOS:

1. Open the dmg and drag Cadjitsu onto Applications.
2. The app is ad-hoc signed, so clear the quarantine flag once:
   xattr -dr com.apple.quarantine /Applications/Cadjitsu.app
3. Open Cadjitsu.

Linux:

1. Unpack it: tar xzf Cadjitsu-1.3.0-Linux-x86_64.tar.gz
2. Run Cadjitsu-1.3.0-Linux-x86_64/cadjitsu.

It brings its own Qt and OpenCASCADE; the system only provides X11 and OpenGL. On Debian or Ubuntu, if something is missing: sudo apt install libgl1 libegl1 libxkbcommon-x11-0 libxcb-cursor0.

What's new in 1.3

Reverse engineering from photos

• Canvas (SOLID > INSERT, or File): a picture on an origin plane, construction plane or planar face, see-through under your sketch. It is saved in the design, sits in the browser's Canvases folder, and every change is one undo step.
• Calibrate: click two marks a known distance apart (a ruler, a coin, a caliper's jaws) and type the real distance.
• Correct Lens: click along a few edges that are straight in reality; the barrel or pincushion bend of a phone or wide-angle lens is measured and taken out. A preview shows the straightened photo.
• Correct Perspective: lay the part on a sheet of paper, click the sheet's corners and type its size (A4 by default); the photo becomes a true top view at scale.
• Trace Canvas (SKETCH > CREATE): hover the part and its outline previews, fitted with lines, arcs and circles, holes included; click to add it with horizontal, vertical and tangent constraints. Type a sensitivity to take in more or less.
• Views (SOLID > INSERT): pictures from the front, the right side and the top, set up on XZ, YZ and XY at one scale from a single measured size, lined up as a projection. It warns when the views disagree.

Solids

• Revolve: turn profiles about a sketch line, an edge or an axis; one side, symmetric or two sides; new body, join, cut or intersect.
• Shell: hollow a body to an even wall, removing the faces you pick (or with a closed void); inside or outside. It warns when walls are thinner than two extrusion lines.

Sketch

• Trim (T): click or drag across pieces to cut them back to the nearest crossings. Text moves to Shift+T.
• Extend: run a line or arc on to the next curve.
• Fillet: round a corner with a tangent arc; the lines' dimensions still measure to the sharp corner.
• Slot and Polygon (inscribed, or across flats for nut traps; Space switches).

AI agents (MCP)

• revolve, shell, sketch_trim, sketch_extend, sketch_fillet, and slot / regular_polygon sketch entities.
• Photos: insert_canvas, calibrate_canvas, canvas_perspective, canvas_lens, insert_views.
• canvas_image shows the agent the picture with a labelled millimetre grid (or zoomed on a detail), trace_canvas traces a part from a point inside it, and sketch_dimension sets measured sizes. Sketch curves list their point ids.