2011
Table Of Contents
- Contents
- Get Information
- The User Interface
- Start and Save Drawings
- Control the Drawing Views
- Organize Drawings and Layouts
- Create Single-View Drawings (Model Space)
- Create Multiple-View Drawing Layouts (Paper Space)
- Create and Modify Objects
- Control the Properties of Objects
- Work with Object Properties
- Work with Layers
- Work with Colors
- Work with Linetypes
- Control Lineweights
- Control the Display Properties of Certain Objects
- Use Precision Tools
- Use Coordinates and Coordinate Systems (UCS)
- Use Dynamic Input
- Snap to Locations on Objects (Object Snaps)
- Restrict Cursor Movement
- Combine or Offset Points and Coordinates
- Specify Distances
- Extract Geometric Information from Objects
- Use a Calculator
- Draw Geometric Objects
- Change Existing Objects
- Add Constraints to Geometry
- Control the Properties of Objects
- Define and Reference Blocks
- Work with Blocks
- Create and Modify Blocks
- Add Behaviors to Blocks (Dynamic Blocks)
- Overview of Dynamic Blocks
- Quick Start to Creating Dynamic Blocks
- Create and Edit Dynamic Blocks
- Add Action Parameters to Dynamic Blocks
- Work with 3D Models
- Annotate Drawings
- Work with Annotations
- Hatches, Fills, and Wipeouts
- Notes and Labels
- Tables
- Dimensions and Tolerances
- Understand Basic Concepts of Dimensioning
- Use Dimension Styles
- Set the Scale for Dimensions
- Create Dimensions
- Modify Existing Dimensions
- Add Geometric Tolerances
- Plot and Publish Drawings
- Prepare Drawings for Plotting and Publishing
- Quick Start to Saving Settings for Plotting and Publishing
- Specify Page Setup Settings
- Overview of Page Setup Settings
- Select a Printer or Plotter for a Layout
- Select a Paper Size for a Layout
- Set the Plot Area of a Layout
- Adjust the Plot Offset of a Layout
- Set the Plot Scale for a Layout
- Set the Lineweight Scale for a Layout
- Select a Plot Style Table for a Layout
- Set Shaded Viewport and Plot Options for a Layout
- Determine the Drawing Orientation of a Layout
- Use the Layout Wizard to Specify Layout Settings
- Import PCP or PC2 Settings into a Layout
- Create and Use Named Page Setups
- Plot Drawings
- Quick Start to Plotting
- Overview of Plotting
- Use a Page Setup to Specify Plot Settings
- Select a Printer or Plotter
- Specify the Area to Plot
- Set Paper Size
- Position the Drawing on the Paper
- Control How Objects Are Plotted
- Preview a Plot
- Plot Files to Other Formats
- Publish Drawings
- Prepare Drawings for Plotting and Publishing
- Share Data Between Files
- Reference Other Drawing Files
- Link and Embed Data (OLE)
- Work with Data in Other Formats
- Import Other File Formats
- Attach Files as Underlays
- Attach Raster Image Files
- Use Drawings from Different Versions and Applications
- Access External Databases
- Collaborate with Others
- Protect and Sign Drawings
- Use the Internet for Collaboration
- Use Markups for Design Review
- Render Drawings
- Glossary
- Index
Evaluating Expressions
CAL evaluates expressions according to standard mathematical rules of
precedence.
Mathematical operators in order of precedence
OperationOperator
Groups expressions( )
Indicates numeric exponent^
Multiplies and divides numbers*, /
Adds and subtracts numbers+, -
Calculating Points
You can use CAL whenever you need to calculate a point or a number within
a command.
For example, you enter (mid+cen)/2 to specify a point halfway between the
midpoint of a line and the center of a circle.
The following example uses CAL as a construction tool. It locates a center
point for a new circle, and then calculates one fifth of the radius of an existing
circle.
Here is the command prompr sequence:
Command: circle
Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: 'cal
>> Expression: (mid+cen)/2
>> Select entity for MID snap: Select the notch line (1)
>> Select entity for CEN snap: Select the large circle (2)
Diameter/<Radius>: 'cal
>> Expression: 1/5*rad
>> Select circle, arc or polyline segment for RAD function: Select the large circle
(3)
Calculate Mathematical Expressions in a Dialog Box
You can also enter and evaluate mathematical expressions in a dialog box
using the following format: =expression<Alt+Enter>.
470 | Chapter 15 Use Precision Tools