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In this workshop, AutoCAD expert and author Scott Onstott teaches you how to build intelligence into drawing objects so that the symbols used in your drawings carry meaning beyond simple geometric representations. Learn how to embed manufacturer, model, and pricing data into commonly used blocks; create invisible attributes that embed data in geometry without it appearing in the drawing area; and use field codes to display information from the AutoCAD database inside text objects. Plus, discover how to format, edit, and extract attribute data for use in external spreadsheets and/or for display within tables in AutoCAD drawings.
Fields are connected to the drawing database. So, whenever the database changes, the fields have the potential to be updated. You will change shape of two rooms and learn the methods for updating fields displaying floor areas. Open the Office 9 project file. Note that Room 100 has an 81.3 square foot area. Let's enlarge this room and see what happens to the field. Toggle on the area layer. (audio playing) Use the Stretch command (audio playing) and click a crossing window down here.
(audio playing) So that you select the boundaries of this edge of the room. (audio playing) Part of the desk is selected but it won't be stretched because it's part of this group. Click an arbitrary point to begin the stretch. Turn on Ortho, move the mouse to the left, and type 3 feet enter. The field hasn't updated yet. The reason is the drawing needs to be regenerated.
Type (audio playing) regen (audio playing) and press Enter. That's all there is to it. The field shows a new value because the magenta polyline is larger now and it's getting that value right off of the object properties of this particular object. (audio playing) Let's go over here to the opposite side of the office. Let's say we want to stretch this as well. Stretch, make a crossing window like this.
Enter. Click some arbitrary point and toggle off Ortho. Stretch it down some arbitrary distance and you'll see that this behaves differently. (audio playing) This magenta outline didn't follow the shape of the existing walls. And that's because it's a region and regions cannot be stretched. Let's delete this. And then, zoom in here and regen.
This field's association has been broken because the object that it was referring to has been deleted. Let's go ahead and create a new region in this space. To do so we need to turn on the header layer. (audio playing) We need to also turn off the furniture (audio playing) and the door layer. (audio playing) Let's set the area layer current and turn off the tags layer.
(audio playing) It looks like we also have some work to do down here by fixing the header. I'll erase that (audio playing) Make the header layer current. (audio playing) And then draw a line from the center of this circle to the center of this circle. I'll then trim and press Enter to select all of the edges as cutting edges. And then click this point (audio playing) and this point to trim the line away.
(audio playing) Now the room is closed and we should be able to recreate a region object here with a boundary command. Select the area layer and make it current. Use the boundary command. Press Enter and click inside the room. (audio playing) Press Enter and yes, we do want to create a region. (audio playing) Okay. Let's turn on all the layers. Click the layer slide out and click this tool to turn all layers on (audio playing) and then lets turn off (audio playing) the header layer (audio playing) so that this object (audio playing) is the region. Okay.
Zoom in here. Double-click on this text, double-click on (audio playing) the field. And we get warned, the object referenced by the field has been erased. Well, we know that. Click OK. And then, scroll down (audio playing) and click (audio playing) object. Reacquire (audio playing) the object by clicking this magenta region (audio playing) Go to Additional Format (audio playing) and change the conversion factor to 1 over 144.
OK and OK. In this lesson, you learned how to update a field by changing the shape of a room and regenerating the drawing. You also learned how associate a new object's properties with an existing field.
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