layerling 1.57.0

• Tinkercad look, and darker grid lines your way: Settings → Appearance has a "Tinkercad look" button that sets the work area as Tinkercad shows it - white ground, a pale blue millimetre grid with a darker line every centimetre, black edge lines, light from above with soft shadows - with the values @prmod3d measured; everything stays adjustable. Under Workplane the darker grid line now comes every 5 or every 10 grid steps and can have a colour of its own, which the centre cross and the plate border take too. The centre cross and the border are drawn as narrow bands on the plate, so they are stronger and grow as you zoom in. Suggested by @prmod3d in #143.
• Typed colour values are kept: In the colour fields of the settings a typed hex value only counted once the field lost focus, and a click outside closed the picker before that - the value was lost. Enter now takes it, and closing the picker keeps it. Reported by @prmod3d in #143.
• The sketch's area under the grid has a colour setting, and the colours clearer names: In sketch mode the sheet under the grid kept its yellowish colour whatever was set - "Sketch background" only coloured the window round it, and "Sketch like work area" could not reach it either. It has a setting of its own now, "Sketch: area under the grid", which "Sketch like work area" and the Tinkercad look set too. And the colour settings say which area they mean: "Window background" and "Workplane under the grid", likewise for the sketch. Reported by @prmod3d in #143.
• Loft: twist and tilt: The loft can now turn its section evenly about the vertical on the way up (up to 360° either way), so the sides wind round, and tilt its top end about both horizontal axes (up to 45°), the sections in between tilting by their share. The highest point stays at the set height, and a tilt too steep for the height gives way. It stays an exact body - built through sections a few degrees apart, like a twisted extrusion - so edges can be filleted and STEP keeps it. The MCP bridge takes loftTwist, loftTiltX and loftTiltZ. Suggested by @prmod3d in #205.
• Point or comma in the section position: The section view's position field, and the radius of a corner fillet or chamfer in a sketch, were number fields, which read the decimal mark by the browser's language - a German browser refused "12.5". They are text fields now, read like every other measure: point or comma, fractions and sums. Reported by @AkiraNorthstar in #210.
• Chrome no longer takes the start page for German: The hidden copy of the welcome guide that search engines and link previews read held its German half in plain text; marked not to be translated, it still counted when Chrome guessed the page's language, and Chrome set to always translate German translated the page on every load. The German half now sits in <noscript>, which programs without JavaScript read as text and a browser never draws. Reported by @gogades in #191.
• Capsule with one smaller end: The capsule can now be narrower at one end, a belt guard round two pulleys of different size: under Properties "Small End (Diameter)" sets the small end, and "Centre Distance" how far apart the two arcs' centres are. The large end keeps the capsule's width, the sides run as tangents to both arcs, and changing the small end keeps the centre distance. It stays an exact body, so edges can be filleted and STEP keeps it. The MCP bridge takes slotEndRatio. Suggested by @nz-pilgrim in #206.
• An SVG comes in as a sketch, with Tinkercad's fill modes: An imported SVG was a fixed mesh. It now comes in as a sketch body: its outlines become sketch lines and Bézier curves - quadratic curves and arcs turned into cubic ones - so the body is exact, edges can be filleted, STEP keeps the curves, and the points can be edited in sketch mode. Every extruded sketch body, an SVG among them, has its fill in the properties: Area, Stroke Outside, Stroke Inside or Stroke Centred, with the line width and the corners, and Silhouette (No Holes) leaves out every outline lying inside another. Silhouette with an outside stroke is a cookie cutter from one SVG. The body is built again where it stands; the Silhouette switch is in the sketch's Stroke panel too. An SVG with more than 2500 lines and curves, or one the CAD kernel builds differently from the drawing, still comes in as a mesh. The MCP bridge sets the fill with stroke and silhouette on layerling_update_object. Suggested by @AkiraNorthstar in #197.
• SVG import and export read the right way round: An imported SVG lay mirrored top to bottom on the plate - lettering read upside down and backwards from above - and the SVG export of the top view was mirrored the same way, so a design exported and imported again looked right. Both now read as the top view shows the plate, the drawing's top at the back. An SVG in a design saved before keeps lying as it did.