Can I scale an object relative to a reference length in BricsCAD?

ByCADbrief Staff

Short Answer

Yes — in BricsCAD, you can scale an object relative to a reference length using the SCALE command and its Reference option. This is the most common professional method for resizing geometry from one known distance to another without manual ratio calculations. Limitation: locked or constrained objects may not scale as expected.

What You Need to Know Before

Warning: If the reference points are picked inaccurately, the entire object will be scaled to the wrong size. This is especially risky with annotated drawings, dimensions, or blocks containing attributes, because their displayed sizes or positions may become inconsistent after scaling.

How to Scale an Object Relative to a Reference Length

  • Command: SCALE

  • Shortcut: SC

  • Quick Steps:

    1. On the Ribbon, go to Home > Modify panel > Scale, or type SC, then select the object(s) and press Enter.
    2. Specify a base point, then type R for the Reference option.
    3. Pick the two points for the current reference length, then enter the new length or pick two points for the target length.

Variables & Settings

  • Key Setting: Reference option in the SCALE command

  • Expert Setting: Use Reference instead of typing a scale factor manually when you know the existing length and required final length. This reduces calculation errors and is the standard production workflow for resizing imported drawings or mismatched geometry.

Why it Fails

  • Cause 1 (Geometry): The wrong reference points were selected, so the scale is mathematically correct but based on the wrong distance.

  • Cause 2 (layers/Locks): Objects on locked layers may be skipped or partially affected, leaving related geometry unscaled.

  • Cause 3 (Command/Logic): Users enter a numeric scale factor instead of using Reference, which causes errors when the true ratio is unknown.

Quick Fix & Best Practice

  • Quick Fix: Run DIST first to verify the existing length, then use SCALE with the Reference option and snap exactly to endpoints.

  • Manager’s Verdict: Use this method for correcting imported survey data, vendor details, or legacy drawings with known measurement errors. Avoid it when parametric constraints, annotation scaling, or block behavior must remain tightly controlled.

FAQ

Can I scale by entering a known final length instead of a factor?
Yes, use the Reference option in SCALE.

Can I scale a block relative to a reference length in BricsCAD?
Yes, as long as the block is not restricted by other settings or workflow constraints.

Will dimensions scale correctly with the object?
Not always — dimensions may need checking depending on their associativity and annotation settings.

.

Related Posts: