2011
Table Of Contents
- Contents
- Get Information
- The User Interface
- Start and Save Drawings
- Control the Drawing Views
- Organize Drawings and Layouts
- Create and Modify Objects
- Control the Properties of 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
- Select Objects
- Correct Mistakes
- Erase Objects
- Cut, Copy, and Paste with the Clipboard
- Modify Objects
- Modify Complex Objects
- Add Constraints to Geometry
- Define and Reference Blocks
- Work with 3D Models
- Create 3D Models
- Overview of 3D Modeling
- Create Solids and Surfaces from Lines and Curves
- Create Solids
- Create Surfaces
- Create Meshes
- Create Wireframe Models
- Add 3D Thickness to Objects
- Modify 3D Models
- Create Sections and 2D Drawings from 3D Models
- Create 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
- Specify Settings for Plotting
- Save Plot Settings as Named Page Setups
- Reuse Named Page Setups
- Specify Page Setup Settings
- Select a Printer or Plotter for a Layout
- Select a Paper Size for a Layout
- Determine the Drawing Orientation of 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
- Print or Plot Drawings
- 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
- Specify Settings for Plotting
- Share Data Between Files
- Reference Other Drawing Files
- Work with Data in Other Formats
- Collaborate with Others
- Render Drawings
- Draw 2D Isometric Views
- Add Lighting to Your Model
- Materials and Textures
- Render 3D Objects for Realism
- Glossary
- Index
This directional light distribution information is stored in a photometric data
file in the IES format using the IES LM-63-1991 standard file format for
photometric data. You can load photometric data files provided by various
manufacturers under the Photometric Web panel in the Properties Inspector
palette for the light. The light icon represents the photometric web you select.
A light that uses a photometric web can be added to a drawing by entering
the commands WEBLIGHT and FREEWEB at the command prompt. The
WEBLIGHT command creates a targeted weblight, whereas the FREEWEB
command creates a weblight without an explicit target.
To describe the directional distribution of the light emitted by a source,
AutoCAD for Mac approximates the source by a point light placed at its
photometric center. With this approximation, the distribution is characterized
as a function of the outgoing direction only. The luminous intensity of the
source for a predetermined set of horizontal and vertical angles is provided,
and the system can compute the luminous intensity along an arbitrary
direction by interpolation.
NOTE Web distribution is used only in rendered images. Weblights are
approximated as point lights in the viewport.
NOTE You can control the size of a web glyph from Tools menu > Options >
Drafting > Light Glyph Settings. Some web glyphs may appear very small on screen
and may need to be adjusted.
Goniometric Diagrams
Photometric data is often depicted using a goniometric diagram.
968 | Chapter 36 Add Lighting to Your Model