How to round the corners of a shape in BricsCAD?

ByCADbrief Staff

Short Answer

Yes — in BricsCAD, you can round the corners of a shape using the FILLET command, which is the fastest and most common professional method for 2D geometry. Set a fillet radius, then select two connected edges or use the Polyline option for an entire closed shape. It only works cleanly when the geometry can intersect properly.

What You Need to Know Before

Warning: If your shape has gaps, overlapping segments, or is not a true polyline, filleting may fail or create unexpected trimmed results. A very large radius can also make corners impossible to fillet if adjacent segments are too short.

How to Round the Corners in BricsCAD

  • Command: FILLET

  • Shortcut: F

  • Quick Steps:

    1. On the Ribbon > Home tab > Modify panel, click Fillet, or type FILLET.
    2. Type R to set the Radius option, then enter the required corner radius.
    3. For a closed polyline shape, type P for Polyline and select the shape to round all corners at once.

Variables & Settings

  • Key Setting: Radius
    Set the fillet radius before selecting objects. If the radius is too large relative to the segment lengths, BricsCAD may reject the fillet or alter the shape in an unintended way.

Why it Fails

  • Cause 1 (Geometry): The segments are too short, not connected, or the radius is larger than the corner can physically support.

  • Cause 2 (layers/Locks): The object is on a locked layer, so BricsCAD cannot modify or trim the geometry.

  • Cause 3 (Command/Logic): You selected separate lines expecting all corners to update automatically, but the Polyline option only works on a true polyline, not loose segments.

Quick Fix & Best Practice

  • Quick Fix: Use PEDIT to join the shape into a closed polyline first, then run FILLET with the Polyline option.
  • Manager’s Verdict: Use FILLET for standard 2D drafting because it is fast, predictable, and easy to edit later. Avoid it on messy imported geometry until you clean and join the segments.

FAQ

Can I round all corners of a rectangle at once in BricsCAD?
Yes, use FILLET with the Polyline option on a closed rectangle polyline.

Why does FILLET say the radius is too large?
Because the selected segments are too short or the corner geometry cannot accommodate that radius.

Can I fillet 3D solids the same way?
No, 3D solids typically use different solid-editing tools rather than the 2D FILLET workflow.

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