Objectives of Chapter 5

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Christopher C. Leoanrd

• Objectives of Chapter 5
• Once the chapter has been completed, a students
  abilities should include
• Creating objects using basic drawing commands
• Arc and its options
• Boundary
• Circle, Donut, Ellipse, Point
• Multi-Line, Polyline, Spline, Xline, Ray
• Using editing tools to create geometric
  constructions
• Dividing, Measuring, and Ogee curves

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Christopher C. Leoanrd

• Methods of selecting draw commands
• Pull-down menu
• Tool Bar
• Command name typed at command line
• Command alias typed at command line
• C circle command
• L line command
• A arc command

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Christopher C. Leoanrd

• Arc Command
• Arcs are created in the counter-clockwise
  rotation
• The 3 point Arc may be created in either
  direction

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Christopher C. Leoanrd

• Arc Command
• 3 point
• 3 points are selected on the circumference of the
  circle

b
a
c
1
3
2
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Christopher C. Leoanrd

• Arc Command
• Start, Center, End
• Selection begins with a Start point on the
  circumference.
• Then select the Senter point of the arc
• Finally, select the End point on the
  circumference counter-clockwise from the start
  point

Center
Start
End
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Christopher C. Leoanrd

• Arc Command
• Start, Center, Angle
• Select the Start point and Center locations.
• Type the value for the Angle in for
  counter-clockwise arc creation

Center
Angle 135º
Start
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Christopher C. Leoanrd

• Arc Command
• Start, Center, Length of Chord
• Select the Start and Center points
• The length of chord is a linear distance from the
  Start point to the End point based on the arcs
  radius

Center
Start
Length is 1.50 in
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Christopher C. Leoanrd

• Arc Command
• Start, End, Angle
• Select the Start Point and then the End point of
  the Arc
• The Angle value is then input for
  counter-clockwise Arc

End
Start
Angle 150º
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Christopher C. Leoanrd

• Arc Command
• Start, End, Direction
• Select Start and End Points
• Drag for the direction of Arc
• Caution Radius of Arc is not known while
  dragging

Dragging for Direction
Start
End
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Christopher C. Leoanrd

• Arc Command
• Start, End, Radius
• Select Start point and End point of Arc
• Radius is then input
• radius Minor Arc
• - radius Major Arc

End
Start
Radius 2.00
End
Start
Radius -1.50
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Christopher C. Leoanrd

• Arc Command
• Center, Start, End
• Similar to Start, Center, End (Just switched
  order)
• Center, Start, Angle
• Similar to Start, Center, Angle (Just switched
  order)
• Center, Start, Length
• Similar to Start Center Length (Just switched
  order)

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Christopher C. Leoanrd

• Arc Command
• Continue
• Continues from the last drawn arc
• Arcs are drawn tangent to the previous arc

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Christopher C. Leoanrd

• Boundary Command
• Advanced Polyline Construction
• Generates a polyline boundary from any closed
  shape
• Speeds up the polyline creation process (over the
  PEDIT Join)
• Always create a separate layer for the boundary
  for easier drawing management

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Christopher C. Leoanrd

• Boundary Command

Make sure there are no gaps in any of the objects
Pick a point inside object to create polyline
Shapes inside the outer object will also be
created as polylines
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Christopher C. Leoanrd

• Circle Command
• 2 point 3 point
• Create a circle by selecting 2 or 3 points on the
  circumference of the circle

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Christopher C. Leoanrd

• Circle Command
• Circle TTR (Tangent, Tangent, Radius)
• Create an arc tangent to a line and another arc
• use Trim command to remove the excess part of the
  circle

Select Tangent points on both objects
Start with a line and Arc
Circle Radius 1.00
Use Trim command Select all objects as cutting
edges
All Trimmed up!
Select these points to Trim
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Christopher C. Leoanrd

• Circle Command
• Circle TTT
• Creates a Circle Tangent to 3 objects
• Red dots are the tangent selection points

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Christopher C. Leoanrd

• Quadrant Snap vs. Tangent Snap
• Quadrant snaps are only located at 0, 90, 180,
  270 degrees
• Tangent snaps are infinite around a circle
• If unsure where location point falls, then use
  tangent

Quadrant Snap Locations
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Christopher C. Leoanrd

• Donut Command
• Creates a filled circle
• Created by setting inside and outside radius
  values
• Placed by center of Donut

Inside Radius 0 Outside Radius 1.00
Inside Radius 0.50 Outside Radius 1.00
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Christopher C. Leoanrd

• Ellipse Command
• Center and Radius
• Create by selecting the center, then the 2 radius
  distance for the major and minor Axis
• Axis Endpoints
• Select the endpoints of the major axis first, and
  then select the radius distance for the minor axis

Center and Radius points
Axis Endpoint selections
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Christopher C. Leoanrd

• Ellipse Command
• Rotated Ellipse
• Created by selecting endpoints
• The first axis defined is now used as an axis of
  rotation that rotates the ellipse into a third
  dimension

Rotated 45º
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Christopher C. Leoanrd

• Multiline Command
• Parallel line segments grouped together
• 16 parallel segments can be grouped
• Line color, linetypes, and space between lines
  can be set
• Multiline editor will assist in cleaning up
  corners and intersections of lines

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Christopher C. Leoanrd

• Multiline Command
• Creation of a multiline is like drawing a line
  Pick 2 endpoints to create it
• The default line has 2 parallel segments 1 inch
  apart
• Justification relates to the placement of the
  line to the point you pick.
• Top of the multiline
• Zero - center of the multiline
• Bottom of the multiline

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Christopher C. Leoanrd

• Multiline Style Command
• Used to set up the characteristics of a multiline
• Multiline styles can be saved with unique names
• Element Properties
• Sets up color, linetype, and offsetdistances of
  the multiline
• Multiline Properties
• Controls the end cap features
• Allows the multiline to be filled in

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Christopher C. Leoanrd

• Multiline Style Command
• Element Properties
• Window shows current status
• Select line to modify or adda new line
• All offset distances are basedfrom center of the
  multiline(current window shows a 1 space
  between the line0.5 above and -0.5 below the
  center of the multiline)

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Christopher C. Leoanrd

• Multiline Style Command
• Multiline Properties
• Controls how each of the ends of the multiline
  are capped
• Line Straight line top to bottom
• Outer arc Creates arc connecting outer
  segments
• Inner arc Creates arc connecting inner segments
• Angle Sets the angle for the line option
• Fill is used to color the entire multiline

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Christopher C. Leoanrd

• Multiline Editing Command
• Edits the junction points betweenthe
  intersections of multilines
• Column 1 - Cross style intersections
• Column 2 - T style intersections
• Column 3 - Corner maker,insert point, remove
  point
• Column 4 - Break segment, break line, weld line
• Note Stretch and Break commands cannot be used
  on multilines

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Christopher C. Leoanrd

• Point Command
• Locate a point on a drawing for later reference
• Works with OSNAP options nearest node
• Input x,y,z or pick location
• Default dot is hard to see - Use Point style
  to change the size and style of the point image

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Christopher C. Leoanrd

• Dividing an Object into Equal Segments
• Divide Command
• Divides an entity into equal segments
• Select entity to divide
• Enter the number of equal segmentsdesired
• Set Point style to another style other than
  default dot
• Use OSNAP node to select points

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Christopher C. Leoanrd

• Setting off Equal Distances
• Measure command
• Locates points based on the input distance
• Points are started from the closest endpoint that
  is used to select the line
• Set Point style to another style other than
  default dot
• Use OSNAP node to select points

Measure distance .50 in
Last segment not .50 in long
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Christopher C. Leoanrd

• Polyline Command
• Creates a multisided closed shape
• Located by the center and radius
• or
• Located by edges of polygon
• Polygon may be inscribed or circumscribed about a
  circle (Remember inscribed is inside!)

Center - radius
Edge points
Circumscribed Polygon Polygon is outside Like a
bolt headRadius is to the middle of segment
Inscribed Polygon Polygon is insideRadius is to
the corner
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Christopher C. Leoanrd

• Ray Command
• Creates a line that is fixed on one end and
  infinite in one direction
• When a ray is broken, one segment turns into a
  line and the other remains a Ray, which is
  infinite in one direction.

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Christopher C. Leoanrd

• Rectangle Command
• Creates a rectangular object based on 2 opposite
  corner points
• Use relative coordinates _at_distltang or _at_X,Y for
  second point
• Rectangle options
• Fillet - fillets the corners based on input
  radius
• Chamfer - chamfers the ends based on chamfer
  distances
• Width - changes width of lines

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Christopher C. Leoanrd

• Spline Command
• Construct a smooth curve given a sequence of
  points
• The accuracy of the curve given a tolerance range
  can be changed

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Christopher C. Leoanrd

• Xline Command
• Creates a construction line that project
  infinitely in 2 directions.
• Use them to help project orthographic views
• Locate a starting point
• Options
• Horizontal - forces line creation to a horizontal
  line
• Vertical - forces line creation to a vertical
  line
• Angular - forces line creation based on angle
  input
• Bisect - bisects an angle with an Xline
• Offset - offset new Xline from existing Xline

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Christopher C. Leoanrd

• Ogee or Reverse Curve Construction
• Start with 2 connected parallel lines ab cd
• Divide the diagonal line into 4 places

CD
CD
AB
AB
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Christopher C. Leoanrd

• Ogee or Reverse Curve Construction
• Create a perpendicular line to the diagonal and
  move it to the divided points to create line XY
• Create another line the same way and place it at
  point Z
• Draw the vertical lines from the intersection of
  the parallel and diagonal lines

CD
X
Z
Y
AB
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Christopher C. Leoanrd

• Ogee or Reverse Curve Construction
• Create circles based on the intersection and the
  radius is to the node point on the diagonal
• The trim the circles to create the Ogee

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Christopher C. Leoanrd

• Express Tools for Drawing
• Wipeout command (wipeout)
• Eliminates all objects that are within the entity
  mask (created like a polyline)
• Revcloud (revcloud)
• Creates a revision cloud that is made of a series
  of arcs that are connected like a polyline