Keeping it simple, what's the difference between NURBS and Polygons?

Keeping it simple, what's the difference between NURBS and Polygons?
by

1 Answer

Answer :

Really really simply, it’s the same as a difference between a bunch of line segments and a bezier curve in Illustrator, but in 3 dimensions. This is off the top of my head (it’s been a while since I’ve done hardcore graphics programming)—but a Non-Rational Bezier Spline (NURB) is a way of representing a three dimensional shape as a mathematical equation—meaning you can have a very smooth curve instead of a bunch of discrete “points” (or triangles) that you have with a polygon. NURBS are great for modeling curved surfaces—polygons are better suited for primitives or instances where you really need to mind the complexity of your model… like models for games—or at least that was important back in the 90’s. Ultimately, everything reduces to polygons when you render… just like a vector curve rasterizes into a bunch of pixels. Do that help you out?
by

Related questions

Why is the Trump team saying yes to the 3D printing of guns?

Description : Why is the Trump team saying yes to the 3D printing of guns?

Last Answer : 3D printed guns are not a thing, you can print parts of guns but not the whole thing. The closest you can get is one with all plastic parts and a metal firing pin. I don't know who would want ... and that tech has been around as long as guns have. The threat of 3d printed guns is sensationalism.

Can ZBrush be used alone? Or do I have to learn other 3D softwares like Maya or Modo?

Description : Can ZBrush be used alone? Or do I have to learn other 3D softwares like Maya or Modo?

Last Answer : That depends on what you want to do. If you just want to do sculpting, then yes, you can just get ZBrush. If you want to do more than that, like texturing, animation or actual rendering, you ... other 3D software packages, and it also has its own sculpting tools, so you do not even need zbrush.

Render full 3d Images of Eagle Cad Boards?

Description : Render full 3d Images of Eagle Cad Boards?

Last Answer : Don’t know for sure but check-out THIS. It will read and display 3-D for AutoCAD .

How do adverts near football goals appear three dimensional on television?

Description : How do adverts near football goals appear three dimensional on television?

Last Answer : They are usually digitally inserted into the picture. Same as the ads behind the batter at baseball games. There may be ads placed there by the stadium, but the TV people are going to cover them up ... of their own, unless the same sponsors that are paying for the TV time paid for the stadium ads.

What programs do people use to make images like this?

Description : What programs do people use to make images like this?

Last Answer : Blender could work. Google it.

Can you show me an example of how a three or more dimensional graph would look like?

Description : Can you show me an example of how a three or more dimensional graph would look like?

Last Answer : answer:http://www.csupomona.edu/~jcclark/classes/bio542l/essays/graphtypes.html http://74.63.141.198/help/ccdsoft%20info/image_processing_features.htm scroll down to the bottom graphs.

For those who've seen the new Clash of the Titans, what'd you think of it?

Description : For those who've seen the new Clash of the Titans, what'd you think of it?

Last Answer : Just saw it today. It’s got a couple of cliches here and it differs significantly, though. I’d say it’s a little below average.

How To Make 3D Soap Paint

Description : How To Make 3D Soap Paint

Last Answer : Materials: 6 tb Liquid starch 1 c Biodegradable soap powder Instructions: Whip ingredients with beater. Mixture may be tinted with tempura.

How to Make 3D Glasses

Description : How to Make 3D Glasses

Last Answer : How to Make 3D Glasses 3D glasses are used to enhance your movie-viewing experience. Remember the View Finder that was so popular in the eighties? The 3D glasses work the same way. While we're used ... be space properly so you can peer through them easily. You can do this on acetate paper as well.

Which 3D TV should you choose?

Description : Which 3D TV should you choose?

Last Answer : Which 3D TV should you choose? Despite the active development of 3D technology in various directions, today 3D TVs sold with special glasses are considered to be the reference ones. The principle of ... TVs are made in full accordance with the latest trends in design art and are real masterpieces.

What's the best math program to manipulate polygons?

Description : What's the best math program to manipulate polygons?

Last Answer : Have you tried Google Sketchup? It’s fun, frustrating, and free.

What type of inner structure can be used to reduce the printing time of the model in RP? a.Higher resolution b.Smaller polygons c.Lower resolution d.None of the above

Description : What type of inner structure can be used to reduce the printing time of the model in RP? a.Higher resolution b.Smaller polygons c.Lower resolution d.None of the above

Last Answer : c.Lower resolution

What type of inner structure makes the smoothest model in RP? a.Higher resolution b.Larger polygons c.Lower resolution d.None of the above

Description : What type of inner structure makes the smoothest model in RP? a.Higher resolution b.Larger polygons c.Lower resolution d.None of the above

Last Answer : a.Higher resolution

STL file converts curved surfaces into_______ a.Polygons b.Lines c.Surfaces d.None of the above

Description : STL file converts curved surfaces into_______ a.Polygons b.Lines c.Surfaces d.None of the above

Last Answer : a.Polygons

The polygons are scaled by applying the following transformation. a.X’=x * Sx + Xf(1-Sx) & Y’=y * Sy + Yf(1-Sy) b.X’=x * Sx + Xf(1+Sx) & Y’=y * Sy + Yf(1+Sy c.X’=x * Sx + Xf(1-Sx) & Y’=y * Sy – Yf(1-Sy) d.X’=x * Sx * Xf(1-Sx) & Y’=y * Sy * Yf(1-Sy)

Description : The polygons are scaled by applying the following transformation. a.X’=x * Sx + Xf(1-Sx) & Y’=y * Sy + Yf(1-Sy) b.X’=x * Sx + Xf(1+Sx) & Y’=y * Sy + Yf(1+Sy c.X’=x * Sx + Xf(1-Sx) & Y’=y * Sy – Yf(1-Sy) d.X’=x * Sx * Xf(1-Sx) & Y’=y * Sy * Yf(1-Sy)

Last Answer : a.X’=x * Sx + Xf(1-Sx) & Y’=y * Sy + Yf(1-Sy)

Polygons are translated by adding to the coordinate positionof each vertex and the current attribute setting. a.Straight line path b.Translation vector c.Differences d.Only b

Description : Polygons are translated by adding to the coordinate positionof each vertex and the current attribute setting. a.Straight line path b.Translation vector c.Differences d.Only b

Last Answer : d.Only b

In which of the following figures, you find two polygons on the same base and between the same parallels ? -Maths 9th

Description : In which of the following figures, you find two polygons on the same base and between the same parallels ? -Maths 9th

Last Answer : (d) In figures (a), (b) and (c) there are two polygons on the same base but they are not between the same parallels. In figure (d), there are two polygons (PQRA and BQRS) on the same base and between the same parallels .

In which of the following figures, you find two polygons on the same base and between the same parallels ? -Maths 9th

Description : In which of the following figures, you find two polygons on the same base and between the same parallels ? -Maths 9th

Last Answer : (d) In figures (a), (b) and (c) there are two polygons on the same base but they are not between the same parallels. In figure (d), there are two polygons (PQRA and BQRS) on the same base and between the same parallels .

How many regular polygons have integer values for their interior angles?

Description : How many regular polygons have integer values for their interior angles?

Last Answer : If the interior angle of a regular polygon is an integer, then so is the exterior angle.For a regular polygon, the exterior angles are all the same and can be calculated as 360° number of sides; for ... 180, 360 sides (not really met, so you can look up the names if you are really interested).

What The sum of the interior angles of a polygons is 7200 degrees how many sides does it have?

Description : What The sum of the interior angles of a polygons is 7200 degrees how many sides does it have?

Last Answer : It will have (7200+360)/180 = 42 sides

What polygons cannot be used to create a pure tessellation?

Description : What polygons cannot be used to create a pure tessellation?

Last Answer : Feel Free to Answer

What is a solid with two bases that are parallel and identical polygons?

Description : What is a solid with two bases that are parallel and identical polygons?

Last Answer : It is a polygonal prism.

Define convex and concave polygons.

Description : Define convex and concave polygons.

Last Answer : Convex Polygon: It is a polygon in which if you take any two positions of polygon then all the points on the line segment joining these two points fall within the polygon itself. Concave ... points on the line segment joining these two points does not fall entirely within the polygon.

Which of the following graphic primitives are considered as the basic building blocks of computer graphics ? (a) Points (b) Lines (c) Polylines (d) Polygons Codes : (A) (a) only (B) (a) and (b) (C) (a), (b) and (c) (D) (a), (b), (c) and (d)

Description : Which of the following graphic primitives are considered as the basic building blocks of computer graphics ? (a) Points (b) Lines (c) Polylines (d) Polygons Codes : (A) (a) only (B) (a) and (b) (C) (a), (b) and (c) (D) (a), (b), (c) and (d)

Last Answer : Answer: B

Figure P shows how a point on a circle traces a path when it is rolled on the ground. The point in which of the polygons shown in the options creates the path in Figure Q?

Description : Figure P shows how a point on a circle traces a path when it is rolled on the ground. The point in which of the polygons shown in the options creates the path in Figure Q?  

Last Answer : D 

Do you have any simple tricks for keeping rings on fingers?

Description : Do you have any simple tricks for keeping rings on fingers?

Last Answer : Get ring guards that make them fit more tightly.

Keeping Your Resume Simple?

Description : Keeping Your Resume Simple?

Last Answer : Finding a new job can be one of the most infuriating things you do. Losing a job can be stressful, but finding a new one can be even worse. This is why it pays off to have a fantastic resume ... list your achievements and keep it as simple as you possibly can so that it does not look too cluttered.

What is the difference between dry aging beef and just keeping in my fridge?

Description : What is the difference between dry aging beef and just keeping in my fridge?

Last Answer : Here’s how it is done ! Yes you can do it at home, but you must start with prime or choice beef and take the steps to process the meat.