2012
Table Of Contents
- Contents
- Welcome to Autodesk Navisworks Simulate 2012
- What Is New in This Release?
- How to Get Assistance
- Installation
- Quick Start to Stand-Alone Installation
- Prepare for Installation
- Install and Run Autodesk Navisworks Simulate 2012
- Move to Autodesk Navisworks from a Previous Release
- Install Autodesk Navisworks for Multiple Users
- Quick Start to Network Administration and Deployment
- Set Up a Deployment
- Installation Troubleshooting
- General Installation Issues
- How can I check my graphics card driver to see if it needs to be updated?
- How do I switch my license from stand-alone to network or network to stand-alone?
- When performing a Typical installation, what gets installed?
- Why should I specify the Project Folder and Site Folder?
- How do I share the Autodesk Navisworks settings on a site and project basis?
- How do I change which exporter plugins are installed?
- How do I register and activate Autodesk Navisworks?
- When should I reinstall the product instead of repairing it?
- When I uninstall my software, what files are left on my system?
- Deployment Issues
- Is there a checklist I can refer to when performing a deployment?
- Where should deployments be located?
- Where can I check if service packs are available for my software?
- How do I choose between 32-bit and 64-bit deployments?
- What are information channels?
- What are additional deployment configuration options?
- Licensing Issues
- Networking Issues
- Where do I find my server name?
- If I choose to create a log file, what kind of information does the log file contain?
- What is an administrative image (MSI) file?
- What is the impact of selecting all products to be included in the administrative image?
- How should I configure a network license server for a firewall
- Uninstall and Maintenance Issues
- General Installation Issues
- Quick Start to Stand-Alone Installation
- Quick Start
- Start and Quit Autodesk Navisworks
- Automatically Save and Recover Autodesk Navisworks Files
- Command Line Options
- The User Interface
- Navigation with the Wheel Button
- Autodesk Navisworks Options
- Location Options
- Graphics System
- Display Units
- Profiles
- Search Directories
- Gizmos
- Work with Files
- Native File Formats
- Compatible CAD Applications
- Use File Readers
- 3DS File Reader
- ASCII Laser Scan File Reader
- Bentley AutoPLANT File Reader
- CIS/2 File Reader
- DWG/DXF File Reader
- DWF/DWFx File Reader
- DGN File Reader
- Faro Scan File Reader
- FBX File Reader
- IFC File Reader
- IGES File Reader
- Inventor File Reader
- JTOpen File Reader
- Leica Scan File Reader
- MAN File Reader
- Parasolid File Reader
- PDS File Reader
- Pro/ENGINEER File Reader
- Riegl Scan File Reader
- RVM File Reader
- SAT File Reader
- SketchUp SKP File Reader
- STEP File Reader
- STL File Reader
- VRML File Reader
- Z+F Scan File Reader
- Use File Exporters
- Manage Files
- View Scene Statistics
- Explore Your Model
- Control Model Appearance and Render Quality
- Review Your Model
- Use Viewpoints and Sectioning Modes
- Record and Play Animations
- Work Within a Team
- Share Data
- Animate Objects
- Create Photorealistic Visualizations
- Simulate Construction Scheduling
- Use the Autodesk Vault Add-In
- Reference
- Animation Export Dialog Box
- Appearance Profiler Dialog Box
- Background Settings Dialog Box
- Collision Dialog Box
- Convert Object Properties Dialog Box
- Culling Options Dialog Box
- Customize Dialog Box
- Default Collision Dialog Box
- Edit Key Frame Dialog Box
- Edit Link Dialog Box
- Edit Viewpoint Dialog Box
- Export Rendered Image Dialog Box
- File Options Dialog Box
- Units and Transform Dialog Box
- Image Export Dialog Box
- InfoCenter Settings Dialog Box
- New Link Dialog Box
- Options Editor Dialog Box
- Publish Dialog Box
- Piranesi EPix Dialog Box
- QTVR Object Movie Settings Dialog Box
- Section Plane Settings Dialog Box
- Glossary
- Index
Soft Shadows
Presenter includes shadows generated from pre-calculated, shadow maps
for each shadow-casting light source. The use of shadow maps enables rapid
rendering of shadows with soft or graduated edges. The shadow resolution
can be controlled to balance performance and image quality.
Soft shadows are only suitable for use with small models, and are disabled by
default. For large models, the generation of the shadow maps can use excessive
amounts of time and memory. Soft shadows generated for large models are
often too vague and dispersed without using an excessively high resolution,
which uses even more memory and time.
Physically Accurate Lights
By default, Presenter uses lights with unitless, or empirical intensities. These
are physically meaningless, and are just chosen to give a visually pleasing
result. Presenter can also use physically accurate intensities. These are defined
in real-world units such as Candela, Lumen, or Lux. However, once you start
using lights with real-world intensities, you start to produce images with a
real-world variation in luminance values.
By default, Presenter uses lights whose intensity remains constant as you
move further from the light. In the real-world intensity is reduced proportional
to the inverse square of the distance from the light. Changing a light’s Fall
Off parameter to Inverse Square Law will more accurately model a light’s
fall off in intensity. However, once you start using lights with real-world fall
off, you start to produce images with a real-world variation in luminance
values.
In the real world, the human eye is capable of resolving images in extremely
varied lighting conditions, ranging from bright sunshine reflecting off snow
to a room lit only by a single candle. In computer graphics, however, you
need to produce an image on a display device which has a very limited range
of luminance values. Therefore, it is necessary to compress the range of
luminance values found in a real-world scene into the displayable range in
such a way as to produce a realistic looking image.
Photography, of course, has exactly the same problem. If a photographer (or
camera) does not take into account the light levels in a scene before calculating
the exposure of the shot, the likely result will be an image which is either
over-exposed (everything is too bright) or under-exposed (everything is too
dark). A professional photographer will also use different speeds of film for
574 | Chapter 13 Create Photorealistic Visualizations