884 Index
4-, 23
6-, 23
8-, 23
k-, 24
Nerve cells
in eye, 295
Newell-Newell-Sancha visible surface
algorithm, 265, 266, 269, 292
Newton-Raphson method, 286, 287, 544,
552, 553, 558, 559, 560, 562, 563,
566, 567, 568, 569, 570, 572, 579, 583,
594, 615, 617, 624, 637, 638, 672,
744
interval analysis version of, 744
overview of, 539
Nicholl-Lee-Nicholl line clipping, 70, 81
Node
in FEM, 746
Nondegenerate
planar cubic curve, 457
Nondestructive testing, 182
Nonluminous object, 295
Nonuniform rational B-spline surface,
513
Normal
induced, 239, 240
inward-pointing, 239
outward-pointing, 239
Normal curvature, 525, 651
Normal vector field, 462
relatively parallel, 462
Normalized device coordinates, 5, 121
Normals test, 232, 238
NTSC, 301
Numerically controlled machine, 162
Numerical stability, 467, 531, 539, 578
NURBS
history of term, 534
NURBS curve, 378, 433, 434, 435, 531, 599,
600
advantages of, 467
derivatives of, 438
disadvantages of, 467
evaluation of, 438
local control of, 436
local convex hull property, 436
order of, 433
projective invariance of, 436
properties of, 436
variation diminishing property, 436
NURBS surface, 221, 474, 513, 531, 599, 600,
645
evaluation of, 515
local control of, 514
local convex hull property, 514
partial derivatives of, 515
projective invariance of, 514
properties of, 513
Nyquist frequency, 790
Nyquist limit, 45
O
Object of revolution, 474
Object precision algorithm, 264
Object reconstruction, 139, 140
Oblique parallel projection, 133
Oblique view, 133
Octonion, 756
Octree, 185, 205, 362, 594
Octree visible surface algorithm, 266,
283
Offset, 638
geodesic, 638
Offset curve, 177, 638, 646
approximation of, 643
of space curve, 643
planar, 640, 641
rational, 644
Offset surface, 177, 186, 520, 638, 644,
646, 681
approximation of, 645
One-point perspective, 118
One-sided power function, 404
Op mode, 9
Opacity, 360
OpenGL, v, 11, 14, 15, 64, 138, 293,
340
Optic nerve, 295
Orbit, 798
Ordered edge list fill algorithm, 51
Ordering
induced, 240
Orientation
induced, 240
induced by normal, 239
of polygon, 239
Oriented bounding box, 573
Oriented polygon, 239
Origin
of view plane, 5