State the characteristics and key features of a NURBS curve.
What will be an ideal response?
This is the kind of spline that is used in most surface modeling tools. Mathematically, a non-uniform rational B-spline (NURBS) curve is a derivative of the B-spline curve. It has two additional characteristics: It is non-uniform and rational. Unlike the uniform B-spline, in which a uniform parameter domain defines each spline segment, the parameter domain of a non-uniform B-spline need not be uniform. Because of the non-uniform characteristic, different levels of continuity between the spline segments can be attained, unequal spacing between the knot points is allowed, and the spline can more accurately interpolate among a set of given points. With a rational form, the curve can better represent conic shapes. To the designer, one major advantage of using NURBS mathematics is that you can trim a curve at any point and the curve will retain its original shape.
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What is the difference between primary and secondary users? The text gives an example of a ticket agent being a primary user of a reservation system and the ticket buyer being the secondary user. Name four examples of systems that have primary and secondary users.
What will be an ideal response?
_______________ is an old UNIX program that uses port 513, works similarly to Telnet, but offers the extra benefit of allowing you to configure it to log in automatically.
Fill in the blank(s) with the appropriate word(s).
#define SQUARE(x) x * xval = SQUARE(num1 + num2); results in the equivalent statement ____.
A. val = num1 + (num2 * num1 + num2); B. val = (num1 + num2 * num1) + num2; C. val = (num1 + num2) * (num1 + num2); D. val = num1 + num2 * num1 + num2;
Keeping type on one layer makes it much easier to modify and change its position within the image.
Answer the following statement true (T) or false (F)