Lecture 3 Drawing Basic Shapes

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Lecture 3Drawing Basic Shapes

• Professor Dr. Miguel Alonso Jr.

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Outline

• Dragmode
• Drawing Circles
• Drawing Arcs
• Drawing Ellipses
• Regular Polygons
• Drawing Rectangles
• Drawing Donuts and Solid Circles
• Using the Revision Cloud

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Dragmode

• Dragmode affects the visibility of the
  rubberband, a stretch line that extends from the
  crosshairs during certain drawing commands
• Dragmode -gt ON,OFF,Auto

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Drawing Circles

• Type C or Circle
• Four Ways of Drawing a circle
• Center Radius (default)
• 3 point
• 2 point
• Tan Tan Radius
• Tan Tan Tan

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Exercise

• 1. Start a new drawing using one of your
  templates.
• 2. Set the circlerad system variable to 0.
• 3. Use the Center, Radius option of the circle
  command to draw a circle similar to the one
• shown in Figure 4-3.
• 4. Use the Center, Diameter option of the circle
  command to draw the circle shown in
• Figure 4-4.
• 5. Draw two vertical parallel lines 10 units
  apart. Use the 2 Points option of the circle
• command to draw a circle tangent to the two
  lines.
• 6. Use the 3 Points option of the circle command
  to draw the circle shown in Figure 4-6.
• 7. Use the Tan, Tan, Radius option of the circle
  command to draw the circles shown in
• Figure 4-7.
• 8. Use the Tan, Tan, Tan option to draw circles
  tangent to existing objects, as in Figure 4-8.
• 9. Set circlerad to .5 and draw circles using
  each circle command option. Compare the
• prompts with those from the first circles drawn
  in this exercise.
• 10. Save the drawing as EX4-1.

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Drawing Arcs

• Type A or Arc
• Three Point Arc
• Start, Center, End (1st point, C, end point)
• Start, Center, Angle (1st point, C, A)
• Start, Center, Length (1st point, C, L)
• Start, End, Angle ( 1st point, E, A)
• Start, End, Direction (1st , E, D)
• Start, End, Radius (1st, E, R)

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• Variations
• Center, Start, End
• Center, Start, Angle
• Center, Start, Length
• Continue from a previously drawn arc
• Arc, -gt Enter, or space bar

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Exercises

• 1. Start a new drawing using one of your
  templates.
• 2. Use the 3 Points option of the ARC command to
  draw arcs similar to the one shown in
• Figure 4-10.
• 3. Use the Start, Center, End option of the ARC
  command to draw the arc shown in
• Figure 4-11.
• 4. Use the Start, Center, Angle option of the ARC
  command to draw the arcs shown in
• Figure 4-12.
• 5. Use the Start, Center, Length option of the
  ARC command to draw the arcs shown in
• Figure 4-13.
• 6. Save the drawing as EX4-2.

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• 1. Start a new drawing using one of your
  templates.
• 2. Use the Start, End, Angle option of the ARC
  command to draw arcs similar to those
• shown in Figure 4-14.
• 3. Use the Start, End, Direction option of the
  ARC command to draw the arcs shown in
• Figure 4-15.
• 4. Use the Start, End, Radius option of the ARC
  command to draw the arcs shown in
• Figure 4-16.
• 5. Save the drawing as EX4-3.

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• 1. Start a new drawing using one of your
  templates.
• 2. Use the Center, Start, End option of the ARC
  command to draw the arc shown in
• Figure 4-17.
• 3. Use the Center, Start, Angle option of the ARC
  command to draw arcs similar to those
• shown in Figure 4-18.
• 4. Use the Center, Start, Length option of the
  ARC command to draw arcs similar to those
• shown in Figure 4-19.
• 5. Use the ARC command and the Continue option to
  draw the arcs shown in Figure 4-20.
• 6. Use the ARC command and the Continue option as
  described in the textbook to draw an
• arc connected to a previously drawn line, as
  shown in Figure 4-21.
• 7. Save the drawing as EX4-4.

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• 1. Start a new drawing using one of your
  templates.
• 2. Use the Center option of the ELLIPSE command
  to draw the ellipse shown in Figure 4-23.
• 3. Use the Center and Rotation options of the
  ELLIPSE command to draw ellipses similar to
• those in Figure 4-24.
• 4. Use the Axis, End option of the ELLIPSE
  command to draw the ellipses shown in
• Figure 4-25.
• 5. Save the drawing as EX4-5.

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Ellipses and Elliptical Arcs

• Type Ellipse
• Center (C, Ep 1, Ep2)
• Rotation
• Axis, End
• Elliptical Arcs
• Ellipse -gt Arc
• Parameter option (P)
• Included angle option (I)

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• 1. Start a new drawing using one of your
  templates.
• 2. Use the Arc option of the ELLIPSE command to
  draw the following elliptical arcs
• A. Use axis endpoints, a second axis distance, a
  0 start angle, and a 90 end angle to
• create an elliptical arc similar to the one in
  Figure 4-26.
• B. Use the same options as in the previous
  instructions to draw a 0 to 180 arc, a 0 to
• 270 arc, and a 90 to 270 arc, similar to the
  examples in Figure 4-26.
• C. Use the Parameter option to draw an elliptical
  arc of your own design.
• D. Use the Rotation option to rotate an
  elliptical arc 45 about its axis.
• E. Use the Included angle option to draw an
  elliptical arc with a 180 included angle and
• another with a 90 included angle.
• F. Use the Center option to draw an elliptical
  arc of your own design.
• 3. Save the drawing as EX4-6.

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Drawing Regular Polygons

• Type Polygon
• Specify sides

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Drawing Rectangles

• Rectang
• Width (W)
• Chamfered (C)
• Fillet (F)
• Area (after first point, then A)
• Dimensions (after first point, D)
• Rotation (after fist point, R)

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Donuts and Solid Circles

• Type Donut
• Fill (on or off)

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Revision Cloud

• Type revcloud
• Arc length,
• Convert object
• Style

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Drawing Problems

• Homework Finish Exercises
• Drawing Problems (To be handed in)
• 5
• 6
• 9
• 10
• Extra Credit, Drawing Problem 2