2013
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)
- Work with Layouts in a Project
- Create and Modify Objects
- Control the Properties of Objects
- Use Precision Tools
- Work with the User Coordinate System (UCS)
- Enter Coordinates to Specify Points
- 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
- Create Objects
- Select and Modify Objects
- Select Objects
- Correct Mistakes
- Erase Objects
- Cut, Copy, and Paste with the Clipboard
- Modify 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 Drawings from 3D Models
- Create 3D Models
- Annotate Drawings
- Work with Annotations
- Overview of Annotations
- Scale Annotations
- Overview of Scaling Annotations
- Set Annotation Scale
- Create Annotative Objects
- Display Annotative Objects
- Add and Modify Scale Representations
- Set Orientation for Annotations
- Hatches, Fills, and Wipeouts
- Notes and Labels
- Overview of Notes and Labels
- Create Text
- Create Leaders
- Use Fields in Text
- Work with Text Styles
- Change Text
- Check Spelling
- Format Multiline Text at the Command Prompt
- 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
- Work with Annotations
- 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
- Named Page Setups with Projects
- 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
- Publish Drawings
- Specify Settings for Plotting
- Share Data Between Files
- Reference Other Drawing Files
- Work with Data in Other Formats
- Import Other File Formats
- Attach PDF Files as Underlays
- Attach Raster Image Files
- Export Drawings to Other File Formats
- Use Drawings from Different Versions and Applications
- Collaborate with Others
- Render Drawings
- Draw 2D Isometric Views
- Add Lighting to Your Model
- Materials and Textures
- Render 3D Objects for Realism
- Glossary
- Index
Sun and Sky Simulation
The sun is a light that simulates the effect of sunlight and can be used to show
how the shadows cast by a structure affect the surrounding area.
Sun and sky are the primary sources of natural illumination in AutoCAD.
Whereas the rays of the sun are parallel and of a yellowish hue, the light cast
from the atmosphere comes from all directions and is distinctly bluish in
color. When the LIGHTINGUNITS system variable is set to photometric, more
sun properties are available.
When the workflow is photometric (the LIGHTINGUNITS system variable is
set to 1 or 2) the sun properties have more properties available and are rendered
using a more physically accurate sunlight model. The sun color is disabled for
the photometric sun; the color is computed automatically based on the time,
date, and location specified in the drawing. The color is determined based on
the position in the sky. When the workflow is generic or standard lighting
(the LIGHTINGUNITS system variable is set to 0), the additional sun and sky
properties are unavailable.
The properties of the sun can be modified by using the Properties Inspector
(PROPERTIES command).
The rays of the sun are parallel and have the same intensity at any distance.
Shadows can be on or off. To improve performance, turn off shadows when
you don’t need them. All settings for the sun except geographic location are
saved per viewport, not per drawing. Geographic location is saved per drawing.
The angle of the light from the sun is controlled by the geographic location
you specify for your model and by the date and time of day. These are
properties of the sun and can be changed in the Properties Inspector. The time
zone used is based on the location, but you can adjust it independently
(TIMEZONE system variable).
Incorporate Luminaire Objects
A luminaire object is a helper object that assembles a set of objects into a light
fixture.
A luminaire object groups and manages the components of a light as a whole.
Light fixtures can be represented by embedding photometric lights in blocks
that also contain geometry. A luminaire object assembles a set of light objects
into a light fixture.
Add Lighting to Your Model | 735