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Frequently Asked Questions

Why should I design in 3D instead of 2D?

Frequently Asked Questions
While the common statement of "2D meets our needs" is often true, it has been proven time and time again that the use of 3D methodology for the vast majority of mechanical design tasks is much more efficient than using 2D methodology. Speed and Accuracy are the two major benefits for designing in 3D. Unlike drafting, the task of designing involves continuous changes, additions, and deletions of geometry.
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What are the advantages of 3D over 2D QCT?

FAQs
Faster patient setup and scan time with 3D QCT. 3D QCT requires the acquisition of a simple set of evenly spaced, parallel planes encompassing two vertebral bodies. 2D QCT requires gantry tilt adjustments to acquire 3 or 4 axial scans through the mid planes of 3 or 4 vertebral bodies. An implication of faster patient setup and scan time is that there is less chance of problems induced by patient motion.
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What is the difference between 3D and 2D backgrounds?

Dozens of Muslins: Photo Backgrounds
Our 3D backgrounds, approximately 10’x 18’, have painted floors which are part of the seamless muslin background itself. Our 2D backgrounds, approximately 10’ x 8’, do not have a floor. (Some of the 2D thumbnails show couples photographed full-length. In these cases we added a separate floor which is not part of the background. Photographers who wish to use a 2D background full-length will need to create their own floor.)
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Will it matter if my game is 2D or 3D?

Welcome to acsv.net, home of the acoders, games and apps dev...
No. The competition is open to both 2D and 3D games and neither game will be scored differently than the other.
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What is the difference between 2D and 3D ultrasounds?

Peek At Baby
D ultrasound is the traditional method of viewing babies in the womb before they are born. It provides helpful information regarding the growing fetus, however, does not give an outward appearance of the fetus. With the new technology of 3D ultrasound you are given the opportunity to see an image that resembles a photo and gives you more details on what your baby looks like.
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How can I stack a set of 2D arrays (images) into a 3D piddle?

PDL::FAQ - Frequently asked questions about PDL
Assuming all arrays are of the same size and in some format recognised by rpic (see PDL::IO::Pic ) you could say: use PDL::IO::Pic; @names = qw/name1.tif .... nameN.tif/; # some file names $dummy = PDL->rpic($names[0]); $cube = PDL->zeroes($dummy->type,$dummy->dims,$#names+1); # make 3D piddle for (0..$#names) {($tmp = $cube->slice(":,:,($_)")) .
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If my 2D or 3D still artwork is accepted, how should I frame it?

Art Gallery | Frequently Asked Questions: SIGGRAPH 2006
Please see Professional Presentation of Finished Work. You must present and pack your artwork safely and professionally. Glass and packing peanuts are NOT acceptable. All framing should use Plexiglas. TOP
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Are you interested in 2D or 3D data analysis?

APAS Info
I'm a junior orthopedic surgeon, planning a research project to evaluate the efficacy of a number of different cervical spine immobilization devices. As I expect you already know, when someone is involved in an accident we use certain methods to move them with the minimum amount of movement to their spine. This involves strapping them into or onto various boards, jackets and vacuum matresses, and may mean carrying them at any angle to extract them from mangled vehicles, cliffsides, etc.
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What do you use to make your cartoons (2D or 3D)?

Box of Mystery.Com - Teasing Cats since 1997
I used Flash 5 to make my 2D cartoons like "Ducktales" (at 12 frames per second,) and I used 3D Studio Max for a lot of my earlier 3D work. I'm now more proficient with Maya when it comes to 3D animation and modeling.
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How do I switch from 2D to 3D and vice versa?

Map24
You will find the 3D panel on the bottom of the map. To activate the 3D map, the panel has to be opened and you need to move the little map in the 3D panel according to your desired 3D perspective. Our interactive map needs a little moment to load all details. Tip: Look at the symbol in the upper right corner of the map: if the orange square is still moving not all details of the map have been loaded yet.
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WHAT IS THE DIFFERENCE BETWEEN 2D, 3D AND 4D IMAGING?

D 4D Ultrasound in Oklahoma
D, 3D and 4D are trademarked terminology used in the industry to distinguish the different types of pictures and videos that can be provided. D ultrasounds are the traditional black & white ultrasounds you have probably seen before. The pictures show the skeletal structure (outline) of the baby. You also get to see the baby moving in 2D! This is the type of ultrasound that was probably used for your diagnostic ultrasound.
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How do I draw 2D controls over my 3D rendering?

OpenGL FAQ / 9 Transformations
The basic strategy is to set up a 2D projection for drawing controls. You can do this either on top of your 3D rendering or in overlay planes. If you do so on top of a 3D rendering, you'll need to redraw the controls at the end of every frame (immediately before swapping buffers). If you draw into the overlay planes, you only need to redraw the controls if you're updating them. To set up a 2D projection, you need to change the Projection matrix.
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When should I use 2D radiographic imaging (2D) and when Computed Tomography (3D)?

FAQs - phoenix|x-ray
We recommend 2D solutions for the inspection of large batches, since 2D inspection is usually faster and can easily be automated. For failure analysis and quality control, Computed Tomography, possibly in combination with high- resolution 2D inspection solutions, is the method of choice for they provide optimal spatial information at highest possible resolution and contrast.
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I came to see a film in 3D, but it was only screening in 2D, why don't you show a 3D version?

IMAX Sydney | Frequently Asked Questions (FAQ)
A 2D film is shot using one roll of film and one lens (as is common in traditional cinema). A 3D film is shot using two rolls of film and two lenses (corresponding to the left and right eye). If a film was not shot in 3D it cannot be screened as a 3D film. Some of the film screening at the theatre were only ever made as 2D films, so that although the theatre can show 3D films it does not mean all films can be screened in 3D.
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Can I do 2D in OpenGL?

Forum FAQ - GameDev.Net Discussion Forums
Yes. Using an orthogonal projection. You can use glOrtho for this. A more detailed answer to the question was posted by Dwarf with Axe here.
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What is Java 2D?

Java Foundation Classes (JFC)
With Java 2D, developers can render, manipulate, and transform complex 2D images and text. Java 2D enables the creation of richer-looking components and applications.
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Why are Line of Muskets and Lightning War 2D and not 3D?

FAQ for Tower Games
For our online strategy games of the American Civil War and WWII, if we were to use small 3D images of the infantry, cavalry, artillery, tanks, mortars, etc, you would not be able to see the battlefield. All computer games that attempt to present a battle using 3D graphics have this problem. If you zoom out to see the battlefield, the troops become smudges, and can hardly be seen. If you zoom right in, and can see the 3D graphics, you can't see the battlefield.
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Q2: My doctor has a 2D ultrasound machine. How is 3D / 4D imaging different?

Geddes Keepsake ultrasounds - 3d ultrasound 4d ultrasound pi...
A2: The differences vary dramatically. Most doctors who complete ultrasound examinations in their offices use older 2D ultrasound imaging equipment purchased several years ago. In some cases the technology is 10 to 15 years old or older. With every new advancement in ultrasound imaging technology, the limitations of the older 2D technology become more apparent. Older 2D technology cannot provide the imaging clarity and resolution of newer 2D, 3D and 4D technology.
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Can I submit a 2D concept and then my 3D model of that concept?

Blizzard Fan Art Contest Guidelines
If you want to submit a 2D Concept of your 3D artwork as well ? go for it! Make sure you inform us in the "comments" section when you are submitting it. Note ? you will have to fill out the submission form for each submission.
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How can I convert the 2D Working Drawings into 3D CAD drawings?

Untitled Document
Working Drawings are used for construction, and as such, need not be in 3D. However, should you require to derive say, a 3D AutoCAD model from EcoHouse-Plans Working Drawings draughted in 2D, you may have to "Morganize" them! ;) Morganization" is a term invented by our CAD collaborator and one of the true unsung heroes of CADD (i.e. Computer Aided Draughting and Design), Mr. Mark T. Morgan. A man of profound understanding and ingenuity at anything to do with CADD, Mr.
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QUESTION: Can I get regular flat 2D prints made from film taken with a 3D camera?

CLIK 3D - Frequently Asked Questions
Yes. Just take your negative to your local photo lab and have them print one of the multiple images into a standard print.
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How did you manage to make the game behave like it was 3D if it was only a 2D game?

The Supernatural Olympics - FAQ
Math formulas, science, and more math formulas. All of my art-related formulas are here. They aren't as complex as they seem, even to get the 3D effects using a formula as simple as multiplying fractions, something a 4th-grader could do. There are several variants of the color-averaging formula originally discovered to do anti-aliasing and transparency in MSPaint since the program didn't allow it (and pretty much still doesn't as of mid-2006).
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Why does the 2D map not scroll in the same way as the 3D map?

Road Angel Navigator FAQ's - Customer Technical Support - Sp...
When attempting to locate a destination using only the Postcode it will only let me enter in 5 digits. For example, I am trying to navigate to NN12 8UP and can only enter NN12 8 I have entered a route but the Road Angel Navigator will not tell me what to do until I have started moving.
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Are the conduction or valence band nonparabolicities implemented in 1D, 2D or 3D?

FAQ
No, unfortunately not yet. The Schr?dinger equation cannot be discretized in real space with them (only with k2 and 4). Even if it is inconsistent they are included into the density of states (MODULE densities, MODULE deriv_densities) for the purpose of calculating the charge density while solving the Schr?dinger equation unmodified with the parabolic effective mass approximation.
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What is the difference between 2D, 2 _D and 3D contouring?

FlashCut CNC - Windows CNC Software and CNC Controls
Dimensions, means that you are cutting out a part with features all at the same depth. This is common for engraving, Laser cutting, plasma cutting, etc. The FlashCut DXF Import automates this very easily. Dimensions means you are cutting a part that has multiple flat features at varying depths. When it is being cut, the Z axis positions itself to a depth and the X and Y interpolate on that plane to cut the feature.
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What is the difference between 2D, 2½D, and 3D CAD?

Unimatic Engineers - Support & FAQs
As you move through the spectrum from 2D to 2½D to 3D you can create more complex parts. There are different CAM software needs for each one. See a side by side comparison and explanation on the Software Overview page.
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gt; Why are 2d Maps for Eve better than 3d in-Game maps?

Eve Strategic Maps | Frequently Asked Questions
The logical grouping of some regions in EvE don't show the strategic value. A case from the demo map is that part of Querious is actually in Delve and has no connection to Querious. The Eve Strategic Map of Delve includes the Querious systems. Since the in-game map is actually 3D, there are many regions where either the 2D map shows overlaps in systems, that appear connected, but are not (or) the 3D map requires a lot of twisting and turning.
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Our designers prefer to work in 2D. Why do we need 3D?

Support • Cadsoft Solutions Limited • 2D/3D CAD So...
Concepts does not force you into a specific modeling practice. You may create your entire concept in 2D, 3D wireframe, surfaces, or solids. Or combinations of the above are very typical. However there advantages to 3D that designers can take advantage of when needed. For example mass properties, interference checks for form and fit studies, automatic drawing generation with precise hidden line removal, photo realistic rendering, and sterolithography prototypes.
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Are elective 2D and 3D ultrasounds covered by Insurance?

Peek At Baby
Currently insurance companies do not cover elective ultrasound. Since this is an elective procedure and no diagnostic information is available, you will need to pay the cost of the ultrasound as an out of pocket expense. We accept cash, cashier's checks, and major credit cards. Gifts certificates will also be available for purchase.
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