computer graphics c version phần 9 potx

... surface. Figure 14-60 shows a ray-traced scene containing multiple objects and texture patterns. Reducing Object-Intersection Calculations Raysurface intersection calculations can account ... purity with the chromaticity diagram. C, . Color C, can then be represented as a combination of white light C and the spectral color C, . Thus, the dominant wavelength of C, is C, . This...

Ngày tải lên: 12/08/2014, 11:20

... focusing, deflection of the electron beam can be controlled either with electric fields or with magnetic fields. Cathode-ray tubes are now commonl!. constructed with magnetic deflection coils ... earth's surface by Tom Palmer, Cray Research Inc./NCSC; Chris Landreth, NCSC; and Dave W, NCSC. Pollutant SO, is plotted as a blue surface, acid-rain deposition is a color pla...

Ngày tải lên: 12/08/2014, 11:20

... geometric components of pictures. Additional output primitives that can be used to construct a picture include circles and other conic sections, quadric surfaces, spline curves and surfaces, polygon ... device inter- face methods is given in the Computer Graphics Interface (CGI) system. And the Computer Graphics Metafile (CGM) system specifies standards for archiv- ing and tra...

Ngày tải lên: 12/08/2014, 11:20

... where text color piramcter tc specifies an allowable color code. We can adj~~st text size by scaling theoverall dimensions (height and width) of characters or by scaling only the character width. ... a curve, ci\rcles (or markers), and text. ?hftesy of Wolfmrn hrch, Inc., The Mah of Malhtica.J Additional primitives available in graphics packages include cell arrays, c...

Ngày tải lên: 12/08/2014, 11:20

... lines arc then processed through the intersection calculations, which must solve simultaneous circle-line equations Splitting Concave Polygons We can identify a concave polygon by calculating ... Area Clipping (polygons) Curve Clipping Text Clipp~ng Line and polygon clipping routines are standard components of graphics pack- ages, but many packages accommodate curved objects, pa...

Ngày tải lên: 12/08/2014, 11:20

... Koh and Hearn ( 199 2). and Barnslev ( 199 31. Shape grammars are d~cc u5wtl In Llassner I 199 21, and particle systems are discussed in Rewes ( 198 11 A cliccus51on or phy51callu I),~wi rnoddinq ... orthographic projection is callcd a \hri :Gi13. Engineering and architectr~ral drawings commonly employ these orthographic projritions, because lengths and angles are accurately de-...

Ngày tải lên: 12/08/2014, 11:20

... track of which surface section is visible on each scan line. This works only if surfaces do not cut through or otherwise cyclically overlap each other (Fig. 13-11). If any kind of cyclic ... algorithms include Elber and Cohen (1 99 0). Franklin and Kankanhalli ( 199 01. Glassner ( 199 0). Naylor, Amanatides, and Thibault ( 199 01, and Segal ( 199 0). EXERCISES 13-1. Devel...

Ngày tải lên: 12/08/2014, 11:20

... Computa Graphics Interface (CGI), 79 Computer Graphio Metafile (CGM), 79 Concatenahon (matrix), 191 ,612-13 Concave polygon splitting, 235-37 Cone filter, 174, 175 Cone receptors, 572 Cone ... (International Commirs~on on Illumination), w Circle equation CaResian, 97 nonparametnc, 97 ,6 19 parametric. 97 ,6 19 polar, 97 Circle-generating algonthms, 97 -102...

Ngày tải lên: 12/08/2014, 11:20

... and science had to rely on expensive and cumbersome equipment, advances in computer technology have made interactive computer graphics a practical tool. Today, we find computer graphics used ... focusing, deflection of the electron beam can be controlled either with electric fields or with magnetic fields. Cathode-ray tubes are now commonl!. constructed with magnetic deflecti...

Ngày tải lên: 04/06/2014, 12:01

... selected) produces more visual variety if you have a large textured area to clone. To set the source point for cloning, simply Option-click (Alt-click) within the current document. You can ... for checking alignment. Using 3D Cameras Animating the 3D cameras is pretty straightforward. In fact, compared to other motion graphics projects motion control 3D is much less abstract. You ... o...

Ngày tải lên: 09/08/2014, 11:21