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AutoCAD Tutorial

AutoCAD 2005: Boundary Hatch Enhancements

March 17, 2004

There are several enhancements in AutoCAD 2005 drawing and editing tools. For example the Copy command is now creates multiple copies by default. The following tutorial demonstrates the new enhancements in the BHATCH command.

Note: This tutorial is designed for AutoCAD 2005.

1. Download and then open 2005_Hatch.dwg. The file displays the top view of a chair [Figure 1].

Figure 1

2. Open the list of layers from the Layers toolbar and thaw the "New Elements" layer [Figure 2].

Figure 2

3. A circle appears in the middle of the drawing. Invoke the TRIM command (choose Modify > Trim). Select the circle as the cutting edge. Press Enter and select the hatch to trim it. As you see in AutoCAD 2005 you can trim hatches with respect to a cutting edge [Figure 3].

Figure 3

4. The hatch remains associative with its boundary. For example move the circle 3 units to the left the hatch is modified respectively [Figure 4].

Figure 4

5. Invoke the BHATCH command (choose Draw > Hatch). The Boundary Hatch dialog box appears. From the list of predefined hatch patterns select Solid. From the list of colors in the Swatch list select Magenta. Notice that there is a new option for the hatch draw order on the right side of the dialog box. Make sure that "Send behind boundary" is selected [Figure 5].

Figure 5

6. Click the Pick Points button. Pick a point inside the uppermost closed area. Press Enter and then click OK to place the hatch in the area [Figure 6].

Figure 6

7. Repeat the BHATCH command. Click the Advanced tab. Notice the new Gap Tolerance option that allows you to hatch open areas [Figure 7]. Make sure that the value is set to 1. This option affects the HPGAPTOL system variable. You can assign values between 0 and 5000 to this system variable.

Figure 7

8. Click the Hatch tab. Click the Pick Points button. Pick a point in the upper open area of the drawing. A message appears on the screen [Figure 8].

Figure 8

9. Click Yes. Press Enter and then OK. The hatch appears in the area [Figure 9].

Figure 9

10. Close the file without saving.

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, and an instructor for AUGI Training Program. He has written 8 books in Farsi, 3 booklets in English, and more than 100 articles for different magazines and newsletters. You can reach Alireza at alireza.parsai@cadpanel.com or visit his website www.cadpanel.com.  

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