Materializr 1.7.3

A smoothness release: fewer freezes, a friendlier touch interface, and a new windowing layer underneath on every platform.

Added

• Drag and drop (desktop). Drop a project file on the window to open it in its own tab. STEP, IGES, BREP, SVG and DXF files import into the current project, STL opens its options dialog, and PNG / JPG / BMP images become reference images. In sketch mode only SVG is accepted.
• Deleting a sketch can be undone.
• Redo button next to Undo in the touch layout.

Changed

• New windowing layer. Materializr now runs on SDL3 on every platform. You shouldn't notice anything except that window resizing is smoother and iOS 27 devices launch the app again.
• Number pad on every numeric field in touch mode. Extrude, Push/Pull, Fillet, Chamfer, Shell, patterns, threads, planes, Revolve, Scale and more now use the in-app pad instead of the full keyboard, and a typed leading zero no longer applies a live zero-distance operation. The pad gained an AC key, and floating dialogs keep themselves on screen so the pad is reachable.
• Open shows progress. Opening a project from File or Open Recent now has a progress bar and no longer locks up the window while the history rebuilds.
• Cleaner menus and history on touch. Desktop shortcut hints (Ctrl+S, Alt+F4) no longer appear on touch devices, and long History rows end in an ellipsis with the full text in the tooltip.
• A new rectangle's History step now reads "Rectangle 25.00 x 22.00 mm" instead of naming its first automatic constraint.

Fixed

• Push/Pull on complex sketches no longer freezes. The first preview runs in the background, so a sketch along a curved face no longer stalls the app for tens of seconds. A very large cut (a multi-body model with hundreds of small regions) dropped from over five minutes to about a second, and now produces the correct result.
• The first click in a sketch no longer freezes the app. Region detection is done off the main thread.
• Extrude with a near-zero distance is refused instead of building a degenerate solid that took about 40 seconds to display.
• Slow Extrude drags no longer stall.
• STL export no longer produces cracked meshes where bodies touch or on extruded splines.
• Sketch Offset no longer leaves tiny slivers at near-tangent junctions.
• Picking ignores edges hidden behind a nearer face.
• Window resize on Wayland keeps redrawing while you drag, instead of freezing until you let go.
• Android idles at about 10% CPU instead of 83%.
• The Fillet / Chamfer panel showed a literal "Radius (%s)"; it now shows the unit.
• Closing a tab with unsaved changes no longer asks about "opening another project".
• Windows: fixed a build break caused by a stray system header.