Construct Bisector Angle in MicroStation - External Angle

Construct Bisector Angle tool bisects the (smaller) angle between two lines. Is there a tool that bisects the external (larger) angle between those lines?

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  • Hi,

    an alternative to Conors's advice is to place SmartLine (or simple line) and to use AccuDraw properly: To define second point, if you will change AccuDraw mode to polar, rotate a compass by one leg and use AccuDraw cacluclator to divide the angle by half, you will receive the same result. If you are familiar with AccuDraw, it can be easier and done in one step. Otherwise the workflow proposed by Conor is simplier.

    With regards,

      Jan

  • OMG I love accudraw!

    I'm trying this out right now! .. duh couldnt do it.. how about a video  say with Jing...

    Lorys

    Started msnt work 1990 - Retired  Nov 2022 ( oh boy am I old )

    But was long time user V8iss10 (8.11.09.919) dabbler CE  update 16 (10.16.00.80) 

    MicroStation user since 1990 Melbourne Australia.
    click link to PM me 

  • Hi Lorys,

    1. Start SmartLine placing, place the firtst point.
    2. Change AccuDraw mode to polar [Space].
    3. Rotate AccuDraw Compass. I used quick rotation [RE], but also element rotation [RE] should work.
    4. Snap to the second leg, so the angle displayed is the angle between legs.
    5. If required, move focus to the angle textbox [Tab].
    6. Use AccuDraw calculator [/ at numerci keyborad] to divide the angle in half.
    7. Voila, the correct bisector is there, just place the second point.

    [Edited] Click on the image, it's the animated GIF, but it's not played by default.

    With regards,

      Jan

  • Thank you all for your answers. I have been using workarounds you are describing until now, but I am looking for an easier way to do it. I have to bisect the external angle many times over again and again and could save a lot of time if I had the right tool.

    I am sure there is a way to do this by writing a macro, can anyone point me in the right direction? Also, it seems like it would be possible for Bentley to add that option to the existing tool.

  • With accudraw, you can bisect an external angle using only the Construct Angle Bisector command.

    Try this:

    1. Pick Construct Angle Bisector command

    2. Snap to the angle point and type "O" to set accudraw origin.

    3. Snap to other end of first line and then type "RQ" and "Enter" to rotate accudraw compass and smart lock to this axis

    4. Move cursor back past the origin point and enter 1st data point

    5. Snap to angle point and enter 2nd data point

    6. Snap to end other end of second line and then type "RQ" and "Enter" to rotate accudraw compass and smart lock to this axis

    7. Move cursor back past the origin point and enter 3rd data point

    (See example video below)

    HTH,

    Ron

Reply
  • With accudraw, you can bisect an external angle using only the Construct Angle Bisector command.

    Try this:

    1. Pick Construct Angle Bisector command

    2. Snap to the angle point and type "O" to set accudraw origin.

    3. Snap to other end of first line and then type "RQ" and "Enter" to rotate accudraw compass and smart lock to this axis

    4. Move cursor back past the origin point and enter 1st data point

    5. Snap to angle point and enter 2nd data point

    6. Snap to end other end of second line and then type "RQ" and "Enter" to rotate accudraw compass and smart lock to this axis

    7. Move cursor back past the origin point and enter 3rd data point

    (See example video below)

    HTH,

    Ron

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