Command Help

circle-by-three-points

 

Command Name

Menu

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circle-by-three-points

Edit ribbon | Arc

a3

Click here

Description

Draws an arc defined by three points interactively in the 3D window. The first two points define the end points of the arc, and the third is a point that the arc passes through.

This command supports Command Line Coordinates. Find out more...

 

How to Use

  1. Run the command.

  2. In the Snapping toolbar, select the required snap and data selection settings.

  3. In the Current Objects toolbar, select the current object or create a new one. More...

  4. In the Current Objects toolbar, select the required Attribute Field and associated Attribute Value parameters. More....

  5. Click to define the start point of the arc.

  6. Click to define the end point of the arc.

  7. Click to define the point on the circumference

Snapping to Data

This command supports both left- (freeform) and right-click snapping. How snapping is applied depends on which of the three points is snapped.

  • If you right-click (snap) to define the start point, the arc will start at the snapped elevation, regardless of the currently active 3D section definition. If your first point is snapped:
    • Selecting the 2nd point (the arc end) with a left click will add the final point of the arc on the currently active section, potentially creating a spiral incline or decline. The third point (left or right click) will define the arc circumference, maintaining the gradual change from start to end point (which will always be on-section).
    • Snapping the 2nd point will ensure the arc will span between the two snapped points and could, potentially, be completely off-section. The third click (left or right click) will define the extent of the arc.
       
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  • If no strings object exists in memory, a new object will be created when this command is run, displaying details of the new object immediately in the Current Objects toolbar.
  • Right-click for snap; left-click for placing points without snapping.
  • If snapping is toggled on, points may be snapped using the right mouse button.
  • Iif you are using a 3-button mouse, the middle button (or the button that emulates this function) will not perform any function in relation to this command.

This command can be completed by double-clicking (or tapping) anywhere in a 3D window.
  openbook.gif (910 bytes)   Related Topics

 

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