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AutoCAD Tutorial

AutoCAD 3D Modeling: Wireframe Models, Part 2

July 29, 2003


Wireframe models can be used in creating surfaces and solids. Here we will build the Wireframe model of a tent. In a later tutorial you will cover the tent with surfaces. If you are not familiar with Wireframe models read the following tutorial:

AutoCAD 3D Modeling: Wireframe Models, Part 1


Figure 1 - Click on image to enlarge

Notes:

  • This tutorial is designed for AutoCAD 2004 though might be applicable for other releases.
  • In this tutorial user entries are in boldface.
  • The 8 symbol is equivalent to pressing Enter.

1. Download r16_wireframe_tent.dwg.

Note: If you are using AutoCAD 2002 or an earlier release download r15_wireframe_tent.dwg.

2. Draw a 9060 rectangle. Locate the lower left corner of the rectangle on origin [Figure 2].


Figure 2

3. Connect the midpoint of vertical sides with a line segment [Figure 3].


Figure 3

4. Move the new line 60 units along Z axis.

Command: m 8
MOVE
Select objects: 1 found
Select objects:
8
Specify base point or displacement:
0,0,608
Specify second point of displacement or <use first point as displacement>:
8

5. Rotate the UCS +90 degrees about X axis.

Note: For more information on UCS read the following tutorial:
AutoCAD 3D Modeling: User Coordinate System

6. Invoke PLAN to view the new XY plane.

Note: For more information on 3D display tools read the following tutorial:
AutoCAD 3D Modeling: 3D Views

7. Copy the line 5 units in negative Y direction [Figure 4].


Figure 4

8. Build an arc on the horizontal lines. Use 3 points method [Figure 5].


Figure 5

9. Erase both auxiliary lines.

10. Rotate UCS +90 degrees about Y axis.

11. Set the view as shown on figure 6.


Figure 6

12. Draw a line segment from origin to the left endpoint of the arc [Figure 7].


Figure 7

13. Invoke PLAN to view the XY plane of the current UCS.

14. Offset the diagonal line 3 units to the right [Figure 8].


Figure 8

15. Build an arc on the diagonal lines with 3 Points method [Figure 9].


Figure 9

16. Erase the auxiliary lines.

17. Create a mirror copy of the arc based on a vertical line that passes through the midpoint of the horizontal line [Figure 10].


Figure 10

18. Click Zoom-Previous button to activate the previous view [Figure 11].


Figure 11

19. Copy the arcs to the other corners of the base rectangle [Figure 12].


Figure 12

20. Enable WCS.

21. Switch to POLES layer.

22. Draw a circle as follows [Figure 13]:

Command: c 8
CIRCLE
Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: 0,30
8
Specify radius of circle or [Diameter]: 2
8


Figure 13

23. Copy the circle 60 units along the Z axis.

24. Draw a 60 unit vertical line from one of the quadrants of the circle [Figure 14]:

Command: l 8
LINE
Specify first point: qua
8
of
Specify next point or [Undo]:
@0,0,608
Specify next point or [Undo]:
8


Figure 14

25. Copy the line on the rest of quadrants [Figure 15]. You may zoom into the drawing to avoid any mistakes.


Figure 15 - Click on image to enlarge

26. Copy circles and vertical lines to the other side of the tent [Figure 16].


Figure 16 - Click on image to enlarge


About the Author

Alireza Parsai is the founder of cadpanel.com. He is a mechanical engineer with more than 12 years experience with AutoCAD. Alireza is an Autodesk Authorized Author, the AutoCAD consultant for Al Khawarizmi Institute, a contributing editor for Augiworld magazine, a writer for CAD Digest, an instructor for AUGI Training Program, and an elected speaker for Autodesk University 2002. He has written 7 books in Farsi, 3 booklets in English, and more than 30 articles for different magazines and newsletters. You can reach him at alireza.parsai@cadpanel.com or visit his website www.cadpanel.com

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