SGI Developer Toolbox 6.1

home *** CD-ROM | disk | FTP | other *** search
/ SGI Developer Toolbox 6.1 / SGI Developer Toolbox 6.1 - Disc 4.iso / public / rayshade / Doc / Guide / camera.tex / node4_ct.html < prev next >
LaTeX Document | 1994-08-02 | 2.2 KB
open in:
MacOS 8.1 extracted |
Win98 extracted |
DOS extracted
browse contents |
view JSON data |
view as text

This file was processed as: LaTeX Document (document/latex).
Confidence	Program	Detection	Match Type	Support
`100%`	dexvert	LaTeX Document `(document/latex)`	magic	Supported
`90%`	dexvert	Hypertext Markup Language File `(text/html)`	magic	Supported
`1%`	dexvert	Text File `(text/txt)`	fallback	Supported
`100%`	file	HTML document text	default (weak)
`99%`	file	LaTeX document text	default
`98%`	file	exported SGML document text	default
`97%`	file	exported SGML document, ASCII text	default
`80%`	TrID	HyperText Markup Language with DOCTYPE	default
`19%`	TrID	HyperText Markup Language	default
`100%`	checkBytes	Printable ASCII	default
`100%`	perlTextCheck	Likely Text (Perl)	default
`100%`	siegfried	fmt/281 LaTeX (Subdocument)	default
`100%`	gt2	HTML (Hyper Text Markup Language) Datei	default
`100%`	detectItEasy	Format: plain text[LF]	default (weak)
`100%`	xdgMime	text/html	default
hex view
+--------+-------------------------+-------------------------+--------+--------+
|00000000| 3c 21 44 4f 43 54 59 50 | 45 20 48 54 4d 4c 20 50 |<!DOCTYP|E HTML P|
|00000010| 55 42 4c 49 43 20 22 2d | 2f 2f 57 33 43 2f 2f 44 |UBLIC "-|//W3C//D|
|00000020| 54 44 20 48 54 4d 4c 20 | 33 2e 32 20 46 69 6e 61 |TD HTML |3.2 Fina|
|00000030| 6c 2f 2f 65 6e 22 3e 0a | 0a 3c 21 2d 2d 43 6f 6e |l//en">.|.<!--Con|
|00000040| 76 65 72 74 65 64 20 77 | 69 74 68 20 4c 61 54 65 |verted w|ith LaTe|
|00000050| 58 32 48 54 4d 4c 20 32 | 30 32 32 20 28 52 65 6c |X2HTML 2|022 (Rel|
|00000060| 65 61 73 65 64 20 4a 61 | 6e 75 61 72 79 20 31 2c |eased Ja|nuary 1,|
|00000070| 20 32 30 32 32 29 20 2d | 2d 3e 0a 3c 48 54 4d 4c | 2022) -|->.<HTML|
|00000080| 20 6c 61 6e 67 3d 22 65 | 6e 22 3e 0a 3c 48 45 41 | lang="e|n">.<HEA|
|00000090| 44 3e 0a 3c 54 49 54 4c | 45 3e 43 6f 6e 74 65 6e |D>.<TITL|E>Conten|
|000000a0| 74 73 20 6f 66 20 44 65 | 70 74 68 20 6f 66 20 46 |ts of De|pth of F|
|000000b0| 69 65 6c 64 3c 2f 54 49 | 54 4c 45 3e 0a 0a 3c 4d |ield</TI|TLE>..<M|
|000000c0| 45 54 41 20 48 54 54 50 | 2d 45 51 55 49 56 3d 22 |ETA HTTP|-EQUIV="|
|000000d0| 43 6f 6e 74 65 6e 74 2d | 54 79 70 65 22 20 43 4f |Content-|Type" CO|
|000000e0| 4e 54 45 4e 54 3d 22 74 | 65 78 74 2f 68 74 6d 6c |NTENT="t|ext/html|
|000000f0| 3b 20 63 68 61 72 73 65 | 74 3d 75 74 66 2d 38 22 |; charse|t=utf-8"|
|00000100| 3e 0a 3c 4d 45 54 41 20 | 4e 41 4d 45 3d 22 76 69 |>.<META |NAME="vi|
|00000110| 65 77 70 6f 72 74 22 20 | 43 4f 4e 54 45 4e 54 3d |ewport" |CONTENT=|
|00000120| 22 77 69 64 74 68 3d 64 | 65 76 69 63 65 2d 77 69 |"width=d|evice-wi|
|00000130| 64 74 68 2c 20 69 6e 69 | 74 69 61 6c 2d 73 63 61 |dth, ini|tial-sca|
|00000140| 6c 65 3d 31 2e 30 22 3e | 0a 3c 4d 45 54 41 20 4e |le=1.0">|.<META N|
|00000150| 41 4d 45 3d 22 47 65 6e | 65 72 61 74 6f 72 22 20 |AME="Gen|erator" |
|00000160| 43 4f 4e 54 45 4e 54 3d | 22 4c 61 54 65 58 32 48 |CONTENT=|"LaTeX2H|
|00000170| 54 4d 4c 20 76 32 30 32 | 32 22 3e 0a 0a 3c 4c 49 |TML v202|2">..<LI|
|00000180| 4e 4b 20 52 45 4c 3d 22 | 53 54 59 4c 45 53 48 45 |NK REL="|STYLESHE|
|00000190| 45 54 22 20 48 52 45 46 | 3d 22 63 61 6d 65 72 61 |ET" HREF|="camera|
|000001a0| 2e 63 73 73 22 3e 0a 0a | 3c 4c 49 4e 4b 20 52 45 |.css">..|<LINK RE|
|000001b0| 4c 3d 22 6e 65 78 74 22 | 20 48 52 45 46 3d 22 6e |L="next"| HREF="n|
|000001c0| 6f 64 65 35 5f 6d 6e 2e | 68 74 6d 6c 22 3e 0a 3c |ode5_mn.|html">.<|
|000001d0| 4c 49 4e 4b 20 52 45 4c | 3d 22 70 72 65 76 69 6f |LINK REL|="previo|
|000001e0| 75 73 22 20 48 52 45 46 | 3d 22 6e 6f 64 65 33 5f |us" HREF|="node3_|
|000001f0| 6d 6e 2e 68 74 6d 6c 22 | 3e 0a 3c 4c 49 4e 4b 20 |mn.html"|>.<LINK |
|00000200| 52 45 4c 3d 22 75 70 22 | 20 48 52 45 46 3d 22 6e |REL="up"| HREF="n|
|00000210| 6f 64 65 31 5f 6d 6e 2e | 68 74 6d 6c 22 3e 0a 3c |ode1_mn.|html">.<|
|00000220| 4c 49 4e 4b 20 52 45 4c | 3d 22 6e 65 78 74 22 20 |LINK REL|="next" |
|00000230| 48 52 45 46 3d 22 6e 6f | 64 65 35 5f 6d 6e 2e 68 |HREF="no|de5_mn.h|
|00000240| 74 6d 6c 22 3e 0a 3c 2f | 48 45 41 44 3e 0a 20 0a |tml">.</|HEAD>. .|
|00000250| 3c 42 4f 44 59 20 62 67 | 63 6f 6c 6f 72 3d 22 23 |<BODY bg|color="#|
|00000260| 66 66 66 66 66 66 22 20 | 74 65 78 74 3d 22 23 30 |ffffff" |text="#0|
|00000270| 30 30 30 30 30 22 20 6c | 69 6e 6b 3d 22 23 39 39 |00000" l|ink="#99|
|00000280| 34 34 45 45 22 20 76 6c | 69 6e 6b 3d 22 23 30 30 |44EE" vl|ink="#00|
|00000290| 30 30 66 66 22 20 61 6c | 69 6e 6b 3d 22 23 30 30 |00ff" al|ink="#00|
|000002a0| 66 66 30 30 22 3e 0a 0a | 3c 48 31 3e 3c 41 20 49 |ff00">..|<H1><A I|
|000002b0| 44 3d 22 53 45 43 54 49 | 4f 4e 30 30 31 33 30 30 |D="SECTI|ON001300|
|000002c0| 30 30 30 30 30 30 30 30 | 30 30 30 30 30 30 22 3e |00000000|000000">|
|000002d0| 0a 44 65 70 74 68 20 6f | 66 20 46 69 65 6c 64 3c |.Depth o|f Field<|
|000002e0| 2f 41 3e 0a 3c 2f 48 31 | 3e 0a 0a 3c 50 3e 0a 55 |/A>.</H1|>..<P>.U|
|000002f0| 6e 64 65 72 20 6d 61 6e | 79 20 63 69 72 63 75 6d |nder man|y circum|
|00000300| 73 74 61 6e 63 65 73 2c | 0a 69 74 20 69 73 20 64 |stances,|.it is d|
|00000310| 65 73 69 72 61 62 6c 65 | 20 74 6f 20 72 65 6e 64 |esirable| to rend|
|00000320| 65 72 0a 6f 62 6a 65 63 | 74 73 20 69 6e 20 74 68 |er.objec|ts in th|
|00000330| 65 20 69 6d 61 67 65 20 | 73 75 63 68 20 74 68 61 |e image |such tha|
|00000340| 74 20 74 68 65 79 20 61 | 72 65 20 69 6e 20 73 68 |t they a|re in sh|
|00000350| 61 72 70 0a 66 6f 63 75 | 73 20 6f 6e 20 74 68 65 |arp.focu|s on the|
|00000360| 20 69 6d 61 67 65 20 70 | 6c 61 6e 65 2e 20 20 54 | image p|lane.  T|
|00000370| 68 69 73 20 69 73 20 61 | 63 68 69 65 76 65 64 20 |his is a|chieved |
|00000380| 62 79 20 75 73 69 6e 67 | 20 74 68 65 20 64 65 66 |by using| the def|
|00000390| 61 75 6c 74 0a 60 60 70 | 69 6e 68 6f 6c 65 27 20 |ault.``p|inhole' |
|000003a0| 63 61 6d 65 72 61 2e 20 | 20 49 6e 20 74 68 69 73 |camera. | In this|
|000003b0| 20 6d 6f 64 65 2c 20 74 | 68 65 20 63 61 6d 65 72 | mode, t|he camer|
|000003c0| 61 27 73 20 61 70 65 72 | 74 75 72 65 20 69 73 20 |a's aper|ture is |
|000003d0| 61 20 73 69 6e 67 6c 65 | 0a 70 6f 69 6e 74 2c 20 |a single|.point, |
|000003e0| 61 6e 64 20 61 6c 6c 20 | 6c 69 67 68 74 20 72 61 |and all |light ra|
|000003f0| 79 73 20 61 72 65 20 66 | 6f 63 75 73 65 64 20 6f |ys are f|ocused o|
|00000400| 6e 20 74 68 65 20 69 6d | 61 67 65 20 70 6c 61 6e |n the im|age plan|
|00000410| 65 2e 0a 0a 3c 50 3e 0a | 41 6c 74 65 72 6e 61 74 |e...<P>.|Alternat|
|00000420| 69 76 65 6c 79 2c 20 6f | 6e 65 20 6d 61 79 20 77 |ively, o|ne may w|
|00000430| 69 64 65 6e 20 74 68 65 | 20 61 70 65 72 74 75 72 |iden the| apertur|
|00000440| 65 20 69 6e 20 6f 72 64 | 65 72 20 74 6f 0a 73 69 |e in ord|er to.si|
|00000450| 6d 75 6c 61 74 65 20 64 | 65 70 74 68 20 6f 66 20 |mulate d|epth of |
|00000460| 66 69 65 6c 64 2e 20 49 | 6e 20 74 68 69 73 20 63 |field. I|n this c|
|00000470| 61 73 65 2c 20 72 61 79 | 73 20 61 72 65 20 63 61 |ase, ray|s are ca|
|00000480| 73 74 20 66 72 6f 6d 20 | 76 61 72 69 6f 75 73 20 |st from |various |
|00000490| 70 6c 61 63 65 73 20 6f | 6e 0a 74 68 65 20 61 70 |places o|n.the ap|
|000004a0| 65 72 74 75 72 65 20 64 | 69 73 6b 20 74 6f 77 61 |erture d|isk towa|
|000004b0| 72 64 73 20 61 20 70 6f | 69 6e 74 20 77 68 6f 73 |rds a po|int whos|
|000004c0| 65 20 64 69 73 74 61 6e | 63 65 20 66 72 6f 6d 20 |e distan|ce from |
|000004d0| 74 68 65 0a 63 61 6d 65 | 72 61 20 69 73 20 65 71 |the.came|ra is eq|
|000004e0| 75 61 6c 20 74 6f 20 74 | 68 65 0a 3c 45 4d 3e 66 |ual to t|he.<EM>f|
|000004f0| 6f 63 75 73 20 64 69 73 | 74 61 6e 63 65 3c 2f 45 |ocus dis|tance</E|
|00000500| 4d 3e 2e 20 20 4f 62 6a | 65 63 74 73 20 74 68 61 |M>.  Obj|ects tha|
|00000510| 74 20 6c 61 79 20 69 6e | 20 74 68 65 20 66 6f 63 |t lay in| the foc|
|00000520| 61 6c 20 70 6c 61 6e 65 | 20 77 69 6c 6c 20 62 65 |al plane| will be|
|00000530| 0a 69 6e 20 73 68 61 72 | 70 20 66 6f 63 75 73 2e |.in shar|p focus.|
|00000540| 20 20 54 68 65 20 66 61 | 72 74 68 65 72 20 61 6e |  The fa|rther an|
|00000550| 20 6f 62 6a 65 63 74 20 | 69 73 20 66 72 6f 6d 20 | object |is from |
|00000560| 74 68 65 20 69 6d 61 67 | 65 20 70 6c 61 6e 65 2c |the imag|e plane,|
|00000570| 0a 74 68 65 20 6d 6f 72 | 65 20 6f 75 74 2d 6f 66 |.the mor|e out-of|
|00000580| 2d 66 6f 63 75 73 20 69 | 74 20 77 69 6c 6c 20 61 |-focus i|t will a|
|00000590| 70 70 65 61 72 20 74 6f | 20 62 65 2e 0a 41 20 77 |ppear to| be..A w|
|000005a0| 69 64 65 72 20 61 70 65 | 72 74 75 72 65 20 77 69 |ider ape|rture wi|
|000005b0| 6c 6c 20 6c 65 61 64 20 | 74 6f 20 61 20 67 72 65 |ll lead |to a gre|
|000005c0| 61 74 65 72 20 62 6c 75 | 72 72 69 6e 67 20 6f 66 |ater blu|rring of|
|000005d0| 0a 6f 62 6a 65 63 74 73 | 20 74 68 61 74 20 64 6f |.objects| that do|
|000005e0| 20 6e 6f 74 20 6c 61 79 | 20 69 6e 20 74 68 65 20 | not lay| in the |
|000005f0| 66 6f 63 61 6c 20 70 6c | 61 6e 65 2e 0a 57 68 65 |focal pl|ane..Whe|
|00000600| 6e 20 75 73 69 6e 67 20 | 61 20 6e 6f 6e 2d 7a 65 |n using |a non-ze|
|00000610| 72 6f 20 61 70 65 72 74 | 75 72 65 20 72 61 64 69 |ro apert|ure radi|
|00000620| 75 73 2c 20 69 74 20 69 | 73 20 62 65 73 74 20 74 |us, it i|s best t|
|00000630| 6f 20 75 73 65 20 6a 69 | 74 74 65 72 65 64 0a 73 |o use ji|ttered.s|
|00000640| 61 6d 70 6c 69 6e 67 20 | 69 6e 20 6f 72 64 65 72 |ampling |in order|
|00000650| 20 74 6f 20 72 65 64 75 | 63 65 20 61 6c 69 61 73 | to redu|ce alias|
|00000660| 69 6e 67 2e 0a 0a 3c 50 | 3e 0a 3c 42 52 3e 0a 3c |ing...<P|>.<BR>.<|
|00000670| 49 4d 47 0a 20 20 53 54 | 59 4c 45 3d 22 68 65 69 |IMG.  ST|YLE="hei|
|00000680| 67 68 74 3a 20 32 2e 33 | 38 65 78 3b 20 76 65 72 |ght: 2.3|8ex; ver|
|00000690| 74 69 63 61 6c 2d 61 6c | 69 67 6e 3a 20 31 37 36 |tical-al|ign: 176|
|000006a0| 2e 34 30 65 78 3b 20 22 | 20 53 52 43 3d 22 69 6d |.40ex; "| SRC="im|
|000006b0| 67 35 2e 70 6e 67 22 0a | 20 41 4c 54 3d 22 5c 62 |g5.png".| ALT="\b|
|000006c0| 65 67 69 6e 7b 64 65 66 | 6b 65 79 7d 7b 61 70 65 |egin{def|key}{ape|
|000006d0| 72 74 75 72 65 7d 7b 7b | 5c 65 6d 20 72 61 64 69 |rture}{{|\em radi|
|000006e0| 75 73 7d 7d 0a 55 73 65 | 20 61 6e 20 61 70 65 72 |us}}.Use| an aper|
|000006f0| 74 75 72 65 20 77 69 74 | 68 20 74 68 65 20 67 69 |ture wit|h the gi|
|00000700| 76 65 6e 20 7b 5c 65 6d | 20 72 61 64 69 75 73 7d |ven {\em| radius}|
|00000710| 2e 0a 5c 65 6e 64 7b 64 | 65 66 6b 65 79 7d 22 3e |..\end{d|efkey}">|
|00000720| 0a 3c 42 52 3e 0a 54 68 | 65 20 64 65 66 61 75 6c |.<BR>.Th|e defaul|
|00000730| 74 20 72 61 64 69 75 73 | 20 69 73 20 7a 65 72 6f |t radius| is zero|
|00000740| 2c 20 72 65 73 75 6c 74 | 69 6e 67 20 69 6e 20 61 |, result|ing in a|
|00000750| 20 70 69 6e 68 6f 6c 65 | 20 63 61 6d 65 72 61 20 | pinhole| camera |
|00000760| 6d 6f 64 65 6c 2e 0a 0a | 3c 50 3e 0a 3c 42 52 3e |model...|<P>.<BR>|
|00000770| 0a 3c 49 4d 47 0a 20 20 | 53 54 59 4c 45 3d 22 68 |.<IMG.  |STYLE="h|
|00000780| 65 69 67 68 74 3a 20 32 | 2e 31 30 65 78 3b 20 76 |eight: 2|.10ex; v|
|00000790| 65 72 74 69 63 61 6c 2d | 61 6c 69 67 6e 3a 20 31 |ertical-|align: 1|
|000007a0| 37 36 2e 36 38 65 78 3b | 20 22 20 53 52 43 3d 22 |76.68ex;| " SRC="|
|000007b0| 69 6d 67 36 2e 70 6e 67 | 22 0a 20 41 4c 54 3d 22 |img6.png|". ALT="|
|000007c0| 5c 62 65 67 69 6e 7b 64 | 65 66 6b 65 79 7d 7b 66 |\begin{d|efkey}{f|
|000007d0| 6f 63 61 6c 64 69 73 74 | 7d 7b 7b 5c 65 6d 20 64 |ocaldist|}{{\em d|
|000007e0| 69 73 74 61 6e 63 65 7d | 7d 0a 53 65 74 20 74 68 |istance}|}.Set th|
|000007f0| 65 20 66 6f 63 61 6c 20 | 70 6c 61 6e 65 20 74 6f |e focal |plane to|
|00000800| 20 62 65 20 7b 5c 65 6d | 20 64 69 73 74 61 6e 63 | be {\em| distanc|
|00000810| 65 7d 20 75 6e 69 74 73 | 20 66 72 6f 6d 20 74 68 |e} units| from th|
|00000820| 65 20 63 61 6d 65 72 61 | 2e 0a 5c 65 6e 64 7b 64 |e camera|..\end{d|
|00000830| 65 66 6b 65 79 7d 22 3e | 0a 3c 42 52 3e 0a 42 79 |efkey}">|.<BR>.By|
|00000840| 20 64 65 66 61 75 6c 74 | 2c 20 74 68 65 20 66 6f | default|, the fo|
|00000850| 63 61 6c 20 64 69 73 74 | 61 6e 63 65 20 69 73 20 |cal dist|ance is |
|00000860| 65 71 75 61 6c 20 74 6f | 20 74 68 65 20 64 69 73 |equal to| the dis|
|00000870| 74 61 6e 63 65 20 66 72 | 6f 6d 20 74 68 65 0a 63 |tance fr|om the.c|
|00000880| 61 6d 65 72 61 20 74 6f | 20 74 68 65 20 6c 6f 6f |amera to| the loo|
|00000890| 6b 20 70 6f 69 6e 74 2e | 0a 0a 3c 50 3e 0a 0a 3c |k point.|..<P>..<|
|000008a0| 48 52 3e 0a 0a 3c 2f 42 | 4f 44 59 3e 0a 3c 2f 48 |HR>..</B|ODY>.</H|
|000008b0| 54 4d 4c 3e 0a          |                         |TML>.   |        |
+--------+-------------------------+-------------------------+--------+--------+