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CMU ARC 48568 - AutoCAD 2D Tutorial

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AutoCAD 2D Tutorial - 131 - Chapter 15 PolylinesAutoCAD 2D Tutorial - 132 - Pline Command 15.1 A polyline is a connected sequence of line segments created as a single object. You can create straight line segments, arc segments, or a combination of the two. 1. Choose Draw, Polyline. or 2. Pick the Pline icon. 3. Type PLINE at the command prompt Command : PLINE or PL 4. Pick A point on the drawing to start the polyline From point:(select) 5. Type One of the following options Arc/Close/Halfwidth/Length/Undo/Width/<endpoint of line>: or 6. Pick A point to continue drawing Arc/Close/Halfwidth/Length/Undo/Width/<endpoint of line>: (pick point) Polyline as one segmentAutoCAD 2D Tutorial - 133 - PLINE options: Arc Toggles to arc mode and you receive the follow ing:Angle/CEnter/CLose/Direction/Halfwidth/ Line/ Radius /Second Pt/Undo/Width/<endpt of arc>: Close Closes a polyline as it does in the line command. Halfwidth Specifies the halfwidth of the next polyline seg ments. Can be tapered. Length Specifies the length to be added to the polyline in the current direction. Undo Undoes the previous pline segment as with the line command. Width Specifies the width of the next polyline segments. Can be tapered. Polyline with arcs Polyline with width .125 Tapered width polyline Tapered width arc polylineAutoCAD 2D Tutorial - 134 - Editing Polylines 15.2 1. Choose Modify, Polyline. or 2. Pick the Pedit icon from the Modify II toolbar. 3. Type PEDIT at the command prompt Command: PEDIT 4. Pick Pick a polyline to edit Select Polyline: (pick) 5. Type One of the following options:Close/Join/ Width/Edit vertex/Fit Curve/Spline/Curve/ Decurve/Undo/eXit Close Closes open polyline segments Join Connects polylines, lines, and arcs to existing polylines. Width Changes the width for all polyline segments. Fit curve Creates curved arc segments around pline vertices at the direction you specify. Spline Curve Creates a curve through control points on a polyline. Decurve Straightens curved segments. Edit Vertex Displays the following Edit Vertex Options: Polyline width change Splined PolylineAutoCAD 2D Tutorial - 135 - Editing Multiple Polylines 1. Type the PEDIT at the command prompt. Command: PEDIT Select polyline or [Multiple]: M Pick multiple polylines to edit.AutoCAD 2D Tutorial - 136 - Editing Vertex Options 3.3 1. Type One of the following vertex options: Next/Previous/Break/Insert/Move/Regen/Straighten/ Tan gent/Width/eXit <N>: Next Moves the X to the next vertex Previous Moves the X to the previous vertex Break Remembers the currently marked vertex and allows you to move to another vertex. You can then remove the segments between these vertices. Closed plines will open. Insert Adds a new vertex after the currently marked vertex. Move Moves the location of the currently marked vertex. Regen Regenerates the pline. Used with the width option. Straighten Remembers the currently marked vertex and allows you to move to another vertex. You can then replace the segments between these vertices with a straight one. Tangent Attaches a tangent direction to the current vertex for later use in curve fitting. Width Changes starting and ending widths for the segment following the marked vertex. eXit Exits from editing vertices.AutoCAD 2D Tutorial - 137 - Explode Command 15.4 1. Choose Modify, Explode. or 2. Pick the Explode icon. 3. Type EXPLODE at the command prompt. Command: EXPLODE or 4. Pick The object to explode. Select objects: (pick) Polyline before explode Polyline (line) after explodeAutoCAD 2D Tutorial - 138 - Turning Lines into Polylines 15.5 Use the PEDIT command to pick lines. AutoCAD will ask if you want to turn these lines into polylines. You can then use the JOIN option under PEDIT to join additional lines to the polyline. 1. Command: pedit Select polyline or [Multiple]: pick line Object selected is not a polyline Do you want to turn it into one? <Y> Enter an option [Close/Join/Width/Edit vertex/Fit/Spline/Decurve/Ltype gen/Undo]: j TIP: • Lines and Arcs must have a common endpoint to join them


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