Primary Light Sources
Ambient lighting comes from all directions, while directional and positional lighting come from one source. (Image courtesy of Intergraph Computer Systems.)
![]() | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Is the BlackBerry Storm touchscreen system better than the iPhone?
- Is the BlackBerry Storm touchscreen system better than the iPhone?Why Not Vibrate?While I prefer some feedback to none at all, actually depressing a glass screen does seem like its headed for problems down the road, at least with heavy users. Why not a "vibrate" feedback similar to what my...
- Discussion threads 2008-10-08
- News to know: Clickjacking redux; SAP pricing; BlackBerry Storm; Windows 7
- Here are today's notable headlines. You can get News To Know via email alert and RSS daily: Ryan Naraine: Webcam hijack demo highlights clickjacking threat Dancho Danchev: Atrivo/Intercage's disconnection briefly disrupts spam levels Adobe posts workaround for clickjacking flaw, NoScript releases ClearClick ...
- Blog posts 2008-10-08
- Future wireless networks could be powered by "smart lighting"
- Future wireless networks could be powered by "smart lighting"No not really..As interesting as the technology sounds - it wont fly, until they get the data rates up. Even though the technology seems to be off for another 10 years - we'll still have radio communications for many, MANY years after...
- Discussion threads 2008-10-07
- Future wireless networks could be powered by "smart lighting"
- A light bulb went off in the head of researchers at Boston University about a new wireless networking technology, which was very appropriate considering that it involves, well, light bulbs. The Smart Lighting Engineering Research Center has been created to develop technology that would allow low-powered...
- Blog posts 2008-10-07
- Pioneer Elite Kuro PRO-111FD
- Pioneer markets its Elite lineup of plasma TVs to appeal to the hard-core home theater enthusiast, and that means pricing these panels above and beyond just about anything else. The enthusiast who can afford one, however, can rest assured that the 50-inch PRO-111FD performs above and beyond anything else on...
- Product reviews 2008-09-30
- How SocialText is breaking the collaboration mold
- Last evening, Ross Mayfield, co-founder of SocialText held a conference call with some of the Irregulars to run through the latest incarnation of the company's flagship product. The surprise he held up his sleeve was Signals, the Twitter for enterprise clone and the topic of much debate today. Unusually for...
- Blog posts 2008-09-30
- (Photos: The Ford Model T turns 100)
- (Photos: The Ford Model T turns 100)one correctionThe model T first ran on alcohol. John Rockefeller was making kerosene for heating and lighting, and gasoline was a useless byproduct. He was literally dumping it into a river at night.Then he realized there could be a huge market for this stuff....
- Discussion threads 2008-09-30
- Can IT spending shift from reactive to proactive?
- Can IT spending shift from reactive to proactive?Reactive to ProactiveWell it is like this:I have been in the IT field for roughly 25 years and most companies treat the IT Infrastructure worse than the mailroom. As an experienced IT Professional, the IT is one of or the very last to...
- Discussion threads 2008-09-29
- Web Button Maker (exe)
- Likno Web Button Maker is a user-friendly software for creating eye-catching and professional custom 3D Web buttons fast and easy. With this program you can design a variety of 3D Web buttons with different effects, backgrounds, and text options by customizing their dimension, text, shadow, lighting, texture and shape. Create...
- Software downloads 2008-09-29
- HP w2408h True Color Widescreen
- The $460 HP w2408h True Color Widescreen is a moderately priced 24-inch monitor with performance nearly comparable to our top-tier 24-incher, the $689 Dell UltraSharp 2408WFP. Still, this monitor lacks a few of the features that would let it compete mano a mano with its top-end counterparts. Although we saw...
- Product reviews 2008-09-26
- Seeing the light: Dell makes major commitment to LED displays
- Within the next 12 months, Dell plans to adopt displays that use light emitting diodes as a standard feature across its entire notebook product line. The first milestone in this transition will come on Dec. 15 of this year, when the company estimates that about two-thirds...
- Blog posts 2008-09-25
- Leadwerks Engine Evaluation Kit (exe)
- Leadwerks Engine features a unified lighting system with dynamic soft shadows. There is no limit to the depth and complexity of lighting interactions. Lamps can be knocked over, lights can be turned on and off at will, and dynamic day/night cycles can be used to render real-time sunsets and weather...
- Software downloads 2008-09-24
- Adobe Photoshop CS4 Extended
- After spending a few weeks working with a beta version, I've concluded that there's just enough that's better in the CS4 updates to Photoshop and Photoshop Extended--most notably, usability improvements for core features--that many people will find themselves sighing, biting the bullet, and upgrading. That bullet biting stems from Adobe's...
- Product reviews 2008-09-23
- Adobe Photoshop CS4
- After spending a few weeks working with a beta version, I've concluded that there's just enough that's better in the CS4 updates to Photoshop and Photoshop Extended--most notably, usability improvements for core features--that many people will find themselves sighing, biting the bullet, and upgrading. That bullet biting stems from Adobe's...
- Product reviews 2008-09-23
- Motorola Renegade V950 (Sprint)
- Photo gallery:Motorola V950The Motorola V950 is the fifth QChat phone that Sprint has released this year. We've seen the Sanyo Pro 200, the Sanyo Pro 700, the LG LX400, and the Samsung Z400, and now we come back to the company that pioneered push-to-talk PTT in the first place ....
- Product reviews 2008-09-22
- Let there be light: dissigno spurs off-the-grid development
- This is one of those posts that I should have written many, many weeks ago because the green technology that's involved is of a type that will have an impact on much, much more than simply a corporate IT environment. Since I'm in a do-gooder mood this evening, this is...
- Blog posts 2008-09-22
- Apple recalls iPhone power adapter
- Apple recalls iPhone power adapterHow about finishing the list"The ultracompact USB power adapters were supplied with every iPhone 3G sold in the following countries" No listRE: Apple recalls iPhone power adapterJust another messed up launch for Apple. What does that make it 6 or 7? I cant believe You Apple...
- Discussion threads 2008-09-22
- Green client tech for non-desktop environments
- Most of the time, I tend to pick up green tech information as it relates to products focused on the typical enterprise productivity worker or small business owners. Someone, like me, who probably is the only person using his or her "client" computer. But I wanted to mention a new...
- Blog posts 2008-09-20
- 3D Model Viewer (zip)
- 3D Model Viewer is dedicated to all 3D Artists who would like to check their models without inserting them in the game and loading the game engine. Support of DirectX and Wavefront OBJ Model Formats. Wavefront to DirectX format converter. Support for most common image/texture types (DDS, JPG, TGA, BMP)....
- Software downloads 2008-09-19
- Welcome to ZDNet's new Home Theater blog
- Welcome to ZDNet's new Home Theater blogInstallation, installation, installationCome on... you all know as well as me that HT installation fees can easily cost just as much, if not more than double the amount of equip. purchased. Please add this section (e.g. professional vs. DIY)RE: Welcome to ZDNet's new...
- Discussion threads 2008-09-17
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