AutoCAD 2004 Customization Tutorial: Raster
Images Slide Shows
By Alireza Parsai,
June 9, 2003
Raster images are created based on pixels rather than
Geometrical objects. Windows Paint and Photoshop are two famous
applications that create Raster images. Some famous Raster
formats are BMP, JPEG, TIFF, TGA, PNG, PCX, and GIF. AutoCAD
RENDER command is also capable to create Raster images based on
3D models.
To view raster images in slide shows you should use the
following AutoLISP statement in your script file:
(c:replay filename type [<xoff> <yoff> <xsize> <ysize>])
filename: The name of the Raster image file.
type: The type of the Raster image file (e.g. "BMP",
"GIF", etc.)
[<xoff> …]: The location and size of the image in pixels. This
section is optional.
The following tutorial shows you how to create Raster images
with RENDER command and then build a slide show.
If you are not familiar with AutoCAD slides and/or scripts read
any of the the relevant tutorial listed below before proceeding:
1. Download the following AutoCAD 2004 drawings:
►
r16_3d_house.dwg
►
r16_3d_part.dwg
►
r16_3d_plate.dwg
If you are using an earlier version of AutoCAD, download the
following files:
►
r15_3d_house.dwg
►
r15_3d_part.dwg
►
r15_3d_plate.dwg
2. Open r16_3d_house.dwg in AutoCAD [Figure 1].
Figure 1 -
Click on image to enlarge
3. Invoke RENDER command. A rendered image of the house appears
in drawing environment [Figure 2].
Figure 2 -
Click on image to enlarge
4. Invoke SAVEIMG command. The Save Image dialog box
appears [Figure 3].
Figure 3
5. Write down the values for X-offset, Y-offset, X-size, and
Y-size. The values that you get may be different with what you
see in figure 3. The size of the image depends on the resolution
of your screen and settings of AutoCAD window.
6. Click OK. The Image File dialog box appears [Figure
4].
Figure 4 -
Click on image to enlarge
7. Save the file as "r16_3d_house.bmp" in AutoCAD search path.
Note: If you are not familiar with AutoCAD Search Path
please read the following tutorial:
8. Repeat the steps 2 to 7 for "r16_3d_part.dwg" and
"r16_3d_plate.dwg". Now the following Raster images are created:
► r16_3d_house.bmp
► r16_3d_part.bmp
► r16_3d_plate.bmp
9. In command line type Notepad and then press Enter twice. The
Notepad window appears.
10. In Notepad window enter the text shown in Figure 5.
Figure 5
11. Save the file as "raster.scr" in AutoCAD search path.
12. Start a new drawing.
13. In command line type SCR. The Select Script File
dialog box appears [Figure 6].
Figure 6 -
Click on image to enlarge
14. Locate and open "raster.scr". The slide show begins. Figure
7 shows one sample image.
Figure 7-
Click on image to enlarge
15. Press Esc to end the show.
16. Invoke REGEN to remove the image from screen.
Note: You may mix raster images with AutoCAD
slides in a slide show. Figure 8 shows a sample script file.
Figure 8
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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