AutoCAD 2004 Customization Tutorial: Custom Hatch Patterns,
Part 2
June 25, 2003
Defining complex hatch patterns needs patience
and a basic knowledge of mathematics. Here you will define a
hatch pattern that consists of 12 line families. If you are not
familiar with hatch pattern definition and/or linetypes, please
read the relevant tutorial first:
►
AutoCAD 2004 Customization Tutorial: Simple Linetypes
►
AutoCAD 2004 Customization
Tutorial: Custom Hatch Patterns, Part 1
1.
Download the following files:
►
R16_complex_hatches.dwg
►
R16_pattern_sketch.dwg
Note: If you are using an earlier release of AutoCAD
download:
► R15_complex_hatches.dwg
► R16_pattern_sketch.dwg
2.
Open R16_pattern_sketch.dwg. The file contains some lines that
help us to define the hatch pattern [Figure 1].
Figure 1 -
Click on image to enlarge
Notes:
-
Every line-family is located on a unique layer.
You may isolate that layer to have a better view of the family
that you are looking for.
-
The recommended start point of each line family
is marked with a point. All the points are on layer 0. You may
remove them by freezing this layer.
-
There are 4 vertical line families. The
specifications of them are shown in the following table:
|
Family |
Angle |
x-origin |
y-origin |
x-offset |
y-offset |
Dash |
Space |
|
G01 |
90 |
0.25 |
1.25 |
0 |
2 |
0.5 |
1.5 |
|
G02 |
90 |
0.75 |
1.25 |
0 |
2 |
0.5 |
1.5 |
|
G03 |
90 |
1.25 |
0.25 |
0 |
2 |
0.5 |
1.5 |
|
G04 |
90 |
1.75 |
0.25 |
0 |
2 |
0.5 |
1.5 |
-
To locate the x-origin and y-origin coordinates
use the ID command.
-
The DIST command can be used to extract
y-offset, dash, and space values. Note that x-offset is always
equal to 0 and y-offset is the offset distance between two
adjacent lines in a family.
-
There are 4 horizontal line families. The
specifications of them are shown in the following table:
|
Family |
Angle |
x-origin |
y-origin |
x-offset |
y-offset |
Dash |
Space |
|
G05 |
0 |
0.25 |
0.25 |
0 |
2 |
0.5 |
1.5 |
|
G06 |
0 |
0.25 |
0.75 |
0 |
2 |
0.5 |
1.5 |
|
G07 |
0 |
1.25 |
1.25 |
0 |
2 |
0.5 |
1.5 |
|
G08 |
0 |
1.25 |
1.75 |
0 |
2 |
0.5 |
1.5 |
|
Family |
Angle |
x-origin |
y-origin |
x-offset |
y-offset |
Dash |
Space |
|
G09 |
45 |
0.75 |
0.75 |
0 |
1.41421 |
.707107 |
.707107 |
|
G10 |
45 |
1.75 |
0.75 |
0 |
1.41421 |
.707107 |
.707107 |
|
G11 |
135 |
1.25 |
0.75 |
0 |
1.41421 |
.707107 |
.707107 |
|
G12 |
135 |
2.25 |
0.75 |
0 |
1.41421 |
.707107 |
.707107 |
3. In
command line type Notepad and press Enter twice. The Notepad
window appears.
4. In
Notepad window enter the proper text [Figure 2].
Figure 2
5.
Save the file as "weave.pat" in AutoCAD search path.
Note: If you are not familiar with AutoCAD search path
read the following tutorial:
►
AutoCAD 2004 Customization Tutorial: Search Paths
6. In
AutoCAD open R16_complex_hatches.dwg.
7.
Fill in the shown areas with the new hatch pattern [Figure 3].
Here the hatch scale is set to 0.5.
Figure 3
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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