Using the CAD Drawings
A CAD Drawing shown in the Showbook Application Window
In Showbook, a vector picture is defined as a CAD Drawing. This definition distinguishes it from a Showbook Image. Both Images and Drawings are termed pictures in the Windows operating system. However, a Drawing is really a vector picture consisting of objects, while an Image is a bitmap of pixel dots making a picture. This subtle difference comes to play as the drawing is resized on the screen. Vector Drawings have no loss of detail when resized on the screen or printer, while Images loose quality when resized. Furthermore, Drawings contain highly accurate dimensional information. Building dimensions or maps are very accurate in the Drawing window and if you print a drawing the printout can be scaled with a ruler to determine dimensions.
About the Drawings
All of the CAD drawings were created in Cadrail, a full featured CAD program for drawing railroads.
Showbook has many different options that allow you to define how much of your drawing appears on the screen and what information to show on the drawing. There are several ways of magnifying or reducing the size of the drawing on the screen and the exact view that appears in your view window. Move the drawing within the Showbook application window using the scroll bars on the right and bottom of the window. You may enlarge or reduce the size using the Zoom functions on the Drawing Tool Bar. You will also find options for changing your view of the drawing on the VIEW menu found on the Main Menu Bar.
One of the most important concepts in CAD is that the x, y, z coordinate grid system you draw within represents full size in real life. This coordinate grid is then mathematically resized by
Showbook to fit on the computer screen. You may position and resize the drawing on the screen any way you like, at any time. Only the visible image changes size on the screen, the overall mathematical drawing remains infinite in size. You can view any part of the drawing space or coordinate system through the application window on the computer screen. In the computer, instead of you moving around in space, the drawing is moved past a fixed window (the computer screen). This is similar to the way a word processing program may show a page of paper on the Windows screen.
When a Drawing is show in the reader, the Drawing Tools on the Main Tool Bar will become visible. You can change the size of the drawing on the screen with the Zoom buttons on the Drawing Tool Bar (see below). You can make the layers in the drawing visible and invisible with the Layers tool bar (see below).
The Drawing Tool Bar
Zoom In Fence
Select Zoom In Fence from the Top Tool bar or from View on the Main Menu bar to magnify the drawing view.
To use Zoom In Fence:
Zoom In or Out
Zoom to Last View
Switch back to your last drawing view using the Zoom Last feature (only valid if you have previously Zoomed In). Zoom Last may be selected from the Top Tool bar or from View on the Main Menu bar.
Show All Objects
When Show All Object is selected , Showbook will change the drawing size to show all the objects in the drawing (the entire drawing limits).
Layer and Styles Tool Bar
You can modify the visible Layers in a drawing using the Properties Tool bar.
Activate the tool bar by clicking on the Layer and Styles Display on the Top Tool bar.
You can select individual Layers to appear on the drawing screen using the Visible property on the Properties Tool bar. Furthermore you can Freeze individual Layers in the drawing using the Freeze property on the Properties Tool bar. The Visible and Freeze properties are selected on the Properties Tool bar by clicking on the V column or F column for that Layer.
Printing a Drawing
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