Laserity：Blender 导入导出插件

Find the flat parts in a Blender scene, arrange them on sheets, and export them as SVG ready for a laser cutter or engraver. Model your project however you like — Laserity works out which objects are actually cuttable from sheet material, measures each one's thickness, flattens it to a 2D outline with its holes, and packs the results onto sheets you can tune by hand.

Output is tuned for LightBurn: each stock thickness lands on its own cut layer and engraving on another, so an import arrives already separated and you only have to set power and speed.

The workflow

Everything lives in the 3D Viewport sidebar (N) under the Laserity tab.

• Scan Scene. Every object that qualifies appears in a list with its measured thickness. Objects that do not qualify are listed with the reason, so nothing disappears silently.
• Choose what to cut. Untick parts you do not want; set a quantity for parts you need more than one of.
• Set the sheet. Pick a bed or stock size, and the margin kept clear at the edges and the spacing kept between parts.
• Arrange. Auto Nest packs everything; Open Nesting Editor gives you a window to move things by hand.
• Export SVG. One file per sheet, in millimetres.

What counts as a flat part

A part is a slab: geometry whose vertices sit almost entirely on two parallel planes a short distance apart. That test catches the panels, ribs and gussets people actually laser-cut, while rejecting solids.

• Orientation does not matter. Measurement happens in world space, so an object tumbled to an arbitrary angle is measured exactly like an axis-aligned one.
• Modifiers are applied first. A plate with boolean holes exports with its holes.
• Rejections are explained. Skipped Objects lists each rejected object with its reason — too thick, not slab-like enough, too chunky to be sheet material, or too small — so you can adjust either the model or the thresholds.
• Two tracing strategies. Top Faces traces the boundary of the faces on the slab's upper plane, giving the exact profile of the material at full thickness. Section slices the solid at mid-thickness instead, which tolerates chamfered or otherwise non-planar top surfaces. Auto tries the first and falls back to the second.

Parts whose thicknesses fall within a configurable tolerance are treated as the same stock. Stock thicknesses never share a sheet — they are physically different pieces of material — so each gets its own run of sheets and its own colour.

The nesting editor

Open Nesting Editor opens a separate window showing every sheet side by side, with one spare empty sheet at the end. Drag a part onto the spare to start a new sheet; empty sheets close themselves up again.

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