It is often useful to display a bitmap in the background when working with a model. To import a bitmap, the user first selects File|Import|Bitmap... The same dialog box can be displayed by selecting Edit|Edit Bitmaps... The Import/Edit Bitmap dialog box will be displayed. The user clicks the Select Image button to select the bitmap to import. If a World (*.wld) file with the same file name as the selected bitmap exists, it will be read and used to specify the location of the bitmap. The user may also click the Import World File button to select a World file to read. The format of world files is described at the following URL.
http://support.esri.com/index.cfm?fa=knowledgebase.techarticles.articleShow&d=16106
The user can also specify the location of the bitmap without using a World file. To specify the location of the bitmap the user clicks on the bitmap several times. For each point the user clicks, a dialog box will appear in which the user must specify the real world locations of the pixels that were clicked. The data will be entered in the table to the left of the image. To delete one of these points, delete one or more of the values for the point. If any of the values for a point is missing, it will be ignored. The user must enter at least three points before importing the bitmap can be completed. The user also must specify a name for the image and whether the image will be visible from the top, front, or side of the model. By default, the image will be visible. However, the user can hide it by unchecking the "Visible" check box.
Bitmaps can be in bmp, jpeg or png formats. However, with computers using the Windows-2000 operating system, GDI+ must be installed to use jpeg images. GDI+ is not required on Windows XP or Linux because support for jpegs is built into the operating system on those platforms. GDI+ can be downloaded from the following Microsoft web site. http://www.microsoft.com/downloads/details.aspx?familyid=6A63AB9C-DF12-4D41-933C-BE590FEAA05A
GDI+ is distributed as a self-extracting compressed file. The dll it contains needs to be put in a location where GoPhast can find it before starting the program. The location where GoPhast is installed is a good place to put it.
See also: “Show or Hide Bitmaps Dialog Box” on page 32.