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OST - 06.04.01 Drawing Arcs (Curved Linear Segments)

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On-Screen Takeoff makes it easy to create arcs or "curved linear segments". Linear Conditions can be set to act as arcs (allow curving) by default or on a segment-by-segment basis. See the next article for details on setting a segment to allow 3-Point adjustments.

Setting a Linear Segment to a Curved Segment

One Existing Segment

Right-click on any Linear segment and select "Set as Curved Segment". This, and only this, segment can be curved.

Defaulting to Curved Segments

When creating a Linear Condition, you can configure the Condition so every segment drawn with it is automatically set to "Curved Segment". On the Linear Condition Properties Advanced Tab , place a checkmark in the "Set as Curved Segment (Default)" option, see Related articles for more information on setting up Linear Conditions.

All takeoff objects drawn with this Condition are automatically set to Curved Segments without having to right-click and assign each object as such. Follow the steps below to bend any linear segment to make it an arc.

Bending an Existing Linear Segment into an Arc

To make an arc out of any linear segment,

  • Select the segment to curve (notice the adjustment boxes on the end indicating the object is selected) (remember, if the Condition was not set to "Set as Curved Segment (Default)", right-click on the selected segment and click Set as Curved Segment)

ALT TEXT

  • Position the cursor near the box at the center of the segment (the cursor changes to a double-ended arrow)
  • Drag that double-ended arrow cursor to curve the segment

ALT TEXT

  • Release the mouse or stylus the desired curvature is achieved

This is a single, curved segment and unlike the Intelligent Curve segments demonstrated in the previous article.

Measuring Circumference Using arcs

To measure the circumference of a circular object, it is possible to draw a linear around the object using Continuous Mode (discussed in the Related article, "Drawing Linear Takeoff") which gets converted to several straighter, shorter segments or use Curved Segments to create an arc and then bend it :

Using the Zoom tool ALT TEXT, zoom into the circular object to measure

Using any Linear Condition, draw a line dissecting the circle ALT TEXT

Grab the Select Tool ALT TEXT,

Right-click the takeoff and select Set as Curved Segment

ALT TEXT

Move the cursor over the middle of the takeoff, the cursor changes from the Move ALT TEXT cursor to the arc ALT TEXT cursor

Click and drag cursor up or down to form a semi-circle

ALT TEXT

Now, grab one of the end points and drag it toward the other. You will create a near circle (there will be a tiny gap, but for estimating purposes, this should suffice).

By adjusting the end points and the center point, you can create a single-segment circle.

Note
Once a segment is set as 'curvable', you cannot place an Attachment on it (Attachments just do not fit on a curved segment, even if the segment hasn't been adjusted). If you need to place an Attachment, you must takeoff the curve using shorter, straight segments (using Intelligent Curve).

click here to view the previous article Drawing Linear TakeoffSetting a Linear Segment to a 3-Point Curveclick here to view the next article



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