2004
Table Of Contents
- Contents
- Chapter 1 - Find the Information You Need
- Part 1 - The User Interface
- Part 2 - Start, Organize, and Save a Drawing
- Part 3 - Control the Drawing Views
- Part 4 - Create and Modify Objects
- Chapter 14 - Control the Properties of Objects
- Chapter 15 - Use Precision Tools
- Chapter 16 - Draw Geometric Objects
- Chapter 17 - Change Existing Objects
- Part 5 - Hatches, Notes, and Dimensions
- Chapter 18 - Hatches, Fills, and Wipeouts
- Chapter 19 - Notes and Labels
- Chapter 20 - Dimensions and Tolerances
- Part 6 - Create Layouts and Plot Drawings
- Chapter 21 - Create Layouts
- Chapter 22 - Plot Drawings
- Part 7 - Share Data Between Drawings and Applications
- Chapter 23 - Reference Other Drawing Files (Xrefs)
- Chapter 24 - Link and Embed Data (OLE)
- Chapter 25 - Work with Data in Other Formats
- Chapter 26 - Access External Databases
- Overview of Using AutoCAD with External Databases
- Access a Database from Within AutoCAD
- Link Database Records to Graphical Objects
- Use Labels to Display Database Information in the Drawing
- Use Queries to Filter Database Information
- Share Link and Label Templates and Queries with Other Users
- Work with Links in Files from Earlier Releases
- Part 8 - Work with Other People and Organizations
- Chapter 27 - Protect and Sign Drawings
- Chapter 28 - Use the Internet to Share Drawings
- Chapter 29 - Insert and View Markups
- Chapter 30 - Publish Drawing Sets
- Part 9 - Create Realistic Images and Graphics
- Glossary
- Index
316 | Chapter 16 Draw Geometric Objects
To create a solid from the intersection of two or more other solids
1 From the Modify menu, choose Solids Editing ➤ Intersect.
2 Select the objects to intersect.
Create and Insert Symbols (Blocks)
A block is one or more objects combined to create a single object. Blocks help
you reuse objects in the same drawing or in other drawings.
Overview of Blocks
You can use several methods to create blocks:
■ Combine objects to create a block definition in your current drawing.
■ Create a drawing file and later insert it as a block in other drawings.
■ Create a drawing file with several related block definitions to serve as a
block library.
A block can be composed of objects drawn on several layers with various
colors, linetypes, and lineweight properties. Although a block is always
inserted on the current layer, the block reference preserves information
about the original layer, color, and linetype properties of the objects that are
contained in the block. You can control whether objects in a block retain
their original properties or inherit their properties from the current layer,
color, linetype, or lineweight settings.
You can use
PURGE to remove unused block definitions from a drawing.
How Blocks Are Stored and Referenced
To understand the operations, commands, and options that are available
with blocks, it is important to understand how blocks are stored and refer-
enced in a drawing. Central to working with blocks is understanding block
definition tables.
Every drawing file has an invisible data area called the block definition table.
The block definition table stores all block definitions, which consist of all
information associated with the block. It is these block definitions that are
referenced when you insert blocks in your drawing.
The following illustrations are conceptual representations of three drawing
files. Each rectangle represents a separate drawing file and is divided into two
parts: the smaller part represents the block definition table, and the larger
part represents the objects in a drawing.