Create arcs with different values

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Arcs can be drawn in quite a variety of ways. And

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a provides a number of methods to accommodate the parameters needed

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to accurately define an arc.

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After completing this video, you will be able to

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create arcs in multiple directions.

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Open the arcs drawing provided in the data set

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arcs can be defined by using a combination of start point

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in point, center point

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arc length radius or tangential direction. We'll look at a few of these methods.

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This drawing shows some walls with a couple of openings that represent doorways.

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The doors are shown as vertical green poly lines but the door swing arcs are missing.

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The first method we'll demonstrate creates an

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arc using the start center and end points

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on the ribbons home tab, click the arc drop down and choose start center end,

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click the start point at the upper end of the

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left hand door for the center point of the arc.

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Pick the other end of the door, the lower end of the green vertical poly line.

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When you begin dragging the arcs in point,

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you notice that the arc is dragging in the opposite

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direction that we need for the arc to be drawn.

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This is because all arcs are drawn in a counterclockwise direction.

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By default,

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you can override this direction by pressing

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the control key while dragging the endpoint,

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hold the control key down and click the opposite side of the door opening

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the wall opening.

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On the right shows a double door opening that will have opposing door swings next.

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We'll look at the start end direction method again on the ribbon,

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choose the arc drop down and this time choose

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start end direction for the left hand door.

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Click the start point at the top end of the door

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for the end point,

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click the node in the middle of the door opening

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the angle that the arc will be drawn

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is specified by the direction that is tangent from the start point.

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Having Ortho or polo tracking turned on can

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be beneficial in establishing this tangent direction,

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drag the cursor to the right perpendicular to the door and

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click to establish the arc for the opposing arc swing.

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We'll use the arc continue method

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again on the ribbon, click the drop down and choose continue.

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The continue method starts a new arc from and tangent to

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the previously drawn arc or line.

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This method only prompts for an end point because the start point and direction

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are determined from the end of the last door swing that was drawn,

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click the end point at the bottom of the right hand door

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on the ribbons view tab click those store view dropdown and choose patio

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on the ribbons home tab again,

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click the arc drop down

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and this time choose center start length

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for this arc.

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We need its center point to be at the intersection of the horizontal wall

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and the yellow center line.

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So we'll pick that intersection for the arc's start point.

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We'll pick the top end point

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of the right hand vertical yellow line and specify the size of the arc

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based on the distance or the cord length between the two vertical yellow lines.

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The wide variety of methods available for creating such a basic geometric shape as

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an arc make it possible to create them in virtually any design situation.