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save_and_load.html

save_and_load.html 42 KB
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  200. .admonitionblock>table td.icon img{max-width:none}
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  201. .admonitionblock>table td.icon .title{font-weight:bold;font-family:"Open Sans","DejaVu Sans",sans-serif;text-transform:uppercase}
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    205. 

  205. .exampleblock>.content>:first-child{margin-top:0}
    206. 

  206. .exampleblock>.content>:last-child{margin-bottom:0}
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    208. 

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    209. 

  209. .sidebarblock>:last-child{margin-bottom:0}
    210. 

  210. .sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
    211. 

  211. .exampleblock>.content>:last-child>:last-child,.exampleblock>.content .olist>ol>li:last-child>:last-child,.exampleblock>.content .ulist>ul>li:last-child>:last-child,.exampleblock>.content .qlist>ol>li:last-child>:last-child,.sidebarblock>.content>:last-child>:last-child,.sidebarblock>.content .olist>ol>li:last-child>:last-child,.sidebarblock>.content .ulist>ul>li:last-child>:last-child,.sidebarblock>.content .qlist>ol>li:last-child>:last-child{margin-bottom:0}
    212. 

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    213. 

  213. .sidebarblock .literalblock pre,.sidebarblock .listingblock pre:not(.highlight),.sidebarblock .listingblock pre[class="highlight"],.sidebarblock .listingblock pre[class^="highlight "],.sidebarblock .listingblock pre.CodeRay,.sidebarblock .listingblock pre.prettyprint{background:#f2f1f1}
    214. 

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    221. 

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    223. 

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    224. 

  224. .listingblock:hover code[data-lang]:before{display:block}
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    226. 

  226. .listingblock.terminal pre .command:not([data-prompt]):before{content:"$"}
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    228. 

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    229. 

  229. table.pyhltable td.code{padding-left:.75em;padding-right:0}
    230. 

  230. pre.pygments .lineno,table.pyhltable td:not(.code){color:#999;padding-left:0;padding-right:.5em;border-right:1px solid #ddddd8}
    231. 

  231. pre.pygments .lineno{display:inline-block;margin-right:.25em}
    232. 

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    233. 

  233. .quoteblock{margin:0 1em 1.25em 1.5em;display:table}
    234. 

  234. .quoteblock>.title{margin-left:-1.5em;margin-bottom:.75em}
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    238. 

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    239. 

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    240. 

  240. .quoteblock .quoteblock{margin-left:0;margin-right:0;padding:.5em 0;border-left:3px solid rgba(0,0,0,.6)}
    241. 

  241. .quoteblock .quoteblock blockquote{padding:0 0 0 .75em}
    242. 

  242. .quoteblock .quoteblock blockquote:before{display:none}
    243. 

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    244. 

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    245. 

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    246. 

  246. .verseblock .attribution{margin-top:1.25rem;margin-left:.5ex}
    247. 

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    248. 

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    250. 

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    251. 

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    252. 

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    253. 

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    254. 

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    255. 

  255. table.tableblock,th.tableblock,td.tableblock{border:0 solid #dedede}
    256. 

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    257. 

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    260. 

  260. table.grid-rows th.tableblock,table.grid-rows td.tableblock{border-width:0 0 1px 0}
    261. 

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    262. 

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    264. 

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    265. 

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    266. 

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    267. 

  267. th.halign-right,td.halign-right{text-align:right}
    268. 

  268. th.halign-center,td.halign-center{text-align:center}
    269. 

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    270. 

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    271. 

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    272. 

  272. table thead th,table tfoot th{font-weight:bold}
    273. 

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    274. 

  274. tbody tr th,tbody tr th p,tfoot tr th,tfoot tr th p{color:rgba(0,0,0,.8);font-weight:bold}
    275. 

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    276. 

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    277. 

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    278. 

  278. ol{margin-left:1.75em}
    279. 

  279. ul li ol{margin-left:1.5em}
    280. 

  280. dl dd{margin-left:1.125em}
    281. 

  281. dl dd:last-child,dl dd:last-child>:last-child{margin-bottom:0}
    282. 

  282. ol>li p,ul>li p,ul dd,ol dd,.olist .olist,.ulist .ulist,.ulist .olist,.olist .ulist{margin-bottom:.625em}
    283. 

  283. ul.unstyled,ol.unnumbered,ul.checklist,ul.none{list-style-type:none}
    284. 

  284. ul.unstyled,ol.unnumbered,ul.checklist{margin-left:.625em}
    285. 

  285. ul.checklist li>p:first-child>.fa-square-o:first-child,ul.checklist li>p:first-child>.fa-check-square-o:first-child{width:1em;font-size:.85em}
    286. 

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    287. 

  287. ul.inline{margin:0 auto .625em auto;margin-left:-1.375em;margin-right:0;padding:0;list-style:none;overflow:hidden}
    288. 

  288. ul.inline>li{list-style:none;float:left;margin-left:1.375em;display:block}
    289. 

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    290. 

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    291. 

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    292. 

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    293. 

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    294. 

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    295. 

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    296. 

  296. ol.upperroman{list-style-type:upper-roman}
    297. 

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    298. 

  298. .hdlist>table,.colist>table{border:0;background:none}
    299. 

  299. .hdlist>table>tbody>tr,.colist>table>tbody>tr{background:none}
    300. 

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    301. 

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    307. 

  307. .imageblock.right,.imageblock[style*="float: right"]{margin:.25em 0 1.25em .625em}
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    309. 

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    310. 

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    311. 

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    312. 

  312. .image.left{margin-right:.625em}
    313. 

  313. .image.right{margin-left:.625em}
    314. 

  314. a.image{text-decoration:none;display:inline-block}
    315. 

  315. a.image object{pointer-events:none}
    316. 

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    317. 

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    318. 

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    319. 

  319. #footnotes{padding-top:.75em;padding-bottom:.75em;margin-bottom:.625em}
    320. 

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    325. 

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    326. 

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    332. 

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    334. 

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    335. 

  335. .black{color:#000}
    336. 

  336. .black-background{background-color:#000}
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  337. .blue{color:#0000bf}
    338. 

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    340. 

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    341. 

  341. .gray{color:#606060}
    342. 

  342. .gray-background{background-color:#7d7d7d}
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  343. .green{color:#006000}
    344. 

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    346. 

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    348. 

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  351. .olive{color:#606000}
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  353. .purple{color:#600060}
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  355. .red{color:#bf0000}
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    357. 

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    358. 

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    359. 

  359. .teal{color:#006060}
    360. 

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  361. .white{color:#bfbfbf}
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    363. 

  363. .yellow{color:#bfbf00}
    364. 

  364. .yellow-background{background-color:#fafa00}
    365. 

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    368. 

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  371. .admonitionblock td.icon .icon-important:before{content:"\f06a";color:#bf0000}
    372. 

  372. .conum[data-value]{display:inline-block;color:#fff!important;background-color:rgba(0,0,0,.8);-webkit-border-radius:100px;border-radius:100px;text-align:center;font-size:.75em;width:1.67em;height:1.67em;line-height:1.67em;font-family:"Open Sans","DejaVu Sans",sans-serif;font-style:normal;font-weight:bold}
    373. 

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  375. .conum[data-value]:after{content:attr(data-value)}
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    377. 

  377. b.conum *{color:inherit!important}
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  378. .conum:not([data-value]):empty{display:none}
    379. 

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    380. 

  380. h1,h2,p,td.content,span.alt{letter-spacing:-.01em}
    381. 

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    383. 

  383. p{margin-bottom:1.25rem}
    384. 

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    385. 

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    386. 

  386. .print-only{display:none!important}
    387. 

  387. @media print{@page{margin:1.25cm .75cm}
    388. 

  388. *{-webkit-box-shadow:none!important;box-shadow:none!important;text-shadow:none!important}
    389. 

  389. a{color:inherit!important;text-decoration:underline!important}
    390. 

  390. a.bare,a[href^="#"],a[href^="mailto:"]{text-decoration:none!important}
    391. 

  391. a[href^="http:"]:not(.bare):after,a[href^="https:"]:not(.bare):after{content:"(" attr(href) ")";display:inline-block;font-size:.875em;padding-left:.25em}
    392. 

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    393. 

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    394. 

  394. thead{display:table-header-group}
    395. 

  395. svg{max-width:100%}
    396. 

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    397. 

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    398. 

  398. #toc,.sidebarblock,.exampleblock>.content{background:none!important}
    399. 

  399. #toc{border-bottom:1px solid #ddddd8!important;padding-bottom:0!important}
    400. 

  400. .sect1{padding-bottom:0!important}
    401. 

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    402. 

  402. #header>h1:first-child{margin-top:1.25rem}
    403. 

  403. body.book #header{text-align:center}
    404. 

  404. body.book #header>h1:first-child{border:0!important;margin:2.5em 0 1em 0}
    405. 

  405. body.book #header .details{border:0!important;display:block;padding:0!important}
    406. 

  406. body.book #header .details span:first-child{margin-left:0!important}
    407. 

  407. body.book #header .details br{display:block}
    408. 

  408. body.book #header .details br+span:before{content:none!important}
    409. 

  409. body.book #toc{border:0!important;text-align:left!important;padding:0!important;margin:0!important}
    410. 

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    411. 

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    412. 

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    413. 

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    414. 

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    415. 

  415. .print-only{display:block!important}
    416. 

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    417. 

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    418. 

  418. </style>
    419. 

  419. <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.5.0/css/font-awesome.min.css">
    420. 

  420. <style>
    421. 

  421. /* Stylesheet for CodeRay to match GitHub theme | MIT License | http://foundation.zurb.com */
    422. 

  422. /*pre.CodeRay {background-color:#f7f7f8;}*/
    423. 

  423. .CodeRay .line-numbers{border-right:1px solid #d8d8d8;padding:0 0.5em 0 .25em}
    424. 

  424. .CodeRay span.line-numbers{display:inline-block;margin-right:.5em;color:rgba(0,0,0,.3)}
    425. 

  425. .CodeRay .line-numbers strong{color:rgba(0,0,0,.4)}
    426. 

  426. table.CodeRay{border-collapse:separate;border-spacing:0;margin-bottom:0;border:0;background:none}
    427. 

  427. table.CodeRay td{vertical-align: top;line-height:1.45}
    428. 

  428. table.CodeRay td.line-numbers{text-align:right}
    429. 

  429. table.CodeRay td.line-numbers>pre{padding:0;color:rgba(0,0,0,.3)}
    430. 

  430. table.CodeRay td.code{padding:0 0 0 .5em}
    431. 

  431. table.CodeRay td.code>pre{padding:0}
    432. 

  432. .CodeRay .debug{color:#fff !important;background:#000080 !important}
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  433. .CodeRay .annotation{color:#007}
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  434. .CodeRay .attribute-name{color:#000080}
    435. 

  435. .CodeRay .attribute-value{color:#700}
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  437. .CodeRay .comment{color:#998;font-style:italic}
    438. 

  438. .CodeRay .char{color:#04d}
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    440. 

  440. .CodeRay .char .delimiter{color:#039}
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  441. .CodeRay .class{color:#458;font-weight:bold}
    442. 

  442. .CodeRay .complex{color:#a08}
    443. 

  443. .CodeRay .constant,.CodeRay .predefined-constant{color:#008080}
    444. 

  444. .CodeRay .color{color:#099}
    445. 

  445. .CodeRay .class-variable{color:#369}
    446. 

  446. .CodeRay .decorator{color:#b0b}
    447. 

  447. .CodeRay .definition{color:#099}
    448. 

  448. .CodeRay .delimiter{color:#000}
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  449. .CodeRay .doc{color:#970}
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  450. .CodeRay .doctype{color:#34b}
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  451. .CodeRay .doc-string{color:#d42}
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  452. .CodeRay .escape{color:#666}
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  453. .CodeRay .entity{color:#800}
    454. 

  454. .CodeRay .error{color:#808}
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  455. .CodeRay .exception{color:inherit}
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  456. .CodeRay .filename{color:#099}
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  457. .CodeRay .function{color:#900;font-weight:bold}
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  458. .CodeRay .global-variable{color:#008080}
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  459. .CodeRay .hex{color:#058}
    460. 

  460. .CodeRay .integer,.CodeRay .float{color:#099}
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  461. .CodeRay .include{color:#555}
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  462. .CodeRay .inline{color:#000}
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  463. .CodeRay .inline .inline{background:#ccc}
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  464. .CodeRay .inline .inline .inline{background:#bbb}
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  465. .CodeRay .inline .inline-delimiter{color:#d14}
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  466. .CodeRay .inline-delimiter{color:#d14}
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  467. .CodeRay .important{color:#555;font-weight:bold}
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  468. .CodeRay .interpreted{color:#b2b}
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  469. .CodeRay .instance-variable{color:#008080}
    470. 

  470. .CodeRay .label{color:#970}
    471. 

  471. .CodeRay .local-variable{color:#963}
    472. 

  472. .CodeRay .octal{color:#40e}
    473. 

  473. .CodeRay .predefined{color:#369}
    474. 

  474. .CodeRay .preprocessor{color:#579}
    475. 

  475. .CodeRay .pseudo-class{color:#555}
    476. 

  476. .CodeRay .directive{font-weight:bold}
    477. 

  477. .CodeRay .type{font-weight:bold}
    478. 

  478. .CodeRay .predefined-type{color:inherit}
    479. 

  479. .CodeRay .reserved,.CodeRay .keyword {color:#000;font-weight:bold}
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  480. .CodeRay .key{color:#808}
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  481. .CodeRay .key .delimiter{color:#606}
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  482. .CodeRay .key .char{color:#80f}
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  488. .CodeRay .regexp .function{color:#404;font-weight:bold}
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  491. .CodeRay .string .content{color:#d14}
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  492. .CodeRay .string .char{color:#d14}
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  493. .CodeRay .string .delimiter{color:#d14}
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  494. .CodeRay .shell{color:#d14}
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  495. .CodeRay .shell .delimiter{color:#d14}
    496. 

  496. .CodeRay .symbol{color:#990073}
    497. 

  497. .CodeRay .symbol .content{color:#a60}
    498. 

  498. .CodeRay .symbol .delimiter{color:#630}
    499. 

  499. .CodeRay .tag{color:#008080}
    500. 

  500. .CodeRay .tag-special{color:#d70}
    501. 

  501. .CodeRay .variable{color:#036}
    502. 

  502. .CodeRay .insert{background:#afa}
    503. 

  503. .CodeRay .delete{background:#faa}
    504. 

  504. .CodeRay .change{color:#aaf;background:#007}
    505. 

  505. .CodeRay .head{color:#f8f;background:#505}
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  506. .CodeRay .insert .insert{color:#080}
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  507. .CodeRay .delete .delete{color:#800}
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  508. .CodeRay .change .change{color:#66f}
    509. 

  509. .CodeRay .head .head{color:#f4f}
    510. 

  510. </style>
    511. 

  511. </head>
    512. 

  512. <body class="article toc2 toc-left">
    513. 

  513. <div id="header">
    514. 

  514. <h1>Saving and Loading Games (.j3o)</h1>
    515. 

  515. <div id="toc" class="toc2">
    516. 

  516. <div id="toctitle">Table of Contents</div>
    517. 

  517. <ul class="sectlevel1">
    518. 

  518. <li><a href="#sample-code">Sample Code</a></li>
    519. 

  519. <li><a href="#saving-a-node">Saving a Node</a></li>
    520. 

  520. </ul>
    521. 

  521. </div>
    522. 

  522. </div>
    523. 

  523. <div id="content">
    524. 

  524. <div id="preamble">
    525. 

  525. <div class="sectionbody">
    526. 

  526. <div class="paragraph">
    527. 

  527. <p>Spatials (that is Nodes and Geometries) can contain audio and light nodes, particle emitters, controls, and user data (player score, health, inventory, etc). For your game distribution, you must convert all original models to a faster binary format. You save individual Spatials as well as scenes using <code>com.jme3.export.binary.BinaryExporter</code>.</p>
    528. 

  528. </div>
    529. 

  529. <div class="paragraph">
    530. 

  530. <p>The jMonkeyEngine&#8217;s binary file format is called <code>.j3o</code>. You can convert, view and edit .j3o files and their materials in the jMonkeyEngine <a href="sdk.html">SDK</a> and compose scenes (this does not include editing meshes). For the conversion, you can either use the BinaryExporters, or a context menu in the SDK.</p>
    531. 

  531. </div>
    532. 

  532. <div class="paragraph">
    533. 

  533. <p><code>com.jme3.export.Savable</code><a href="spatial.html">spatial&#8217;s user data</a>“</p>
    534. 

  534. </div>
    535. 

  535. <div class="paragraph">
    536. 

  536. <p>There is also a com.jme3.export.xml.XMLExporter and com.jme3.export.xml.XMLImporter that similarly converts jme3 spatials to an XML format. But you wouldn&#8217;t use that to load models at runtime (quite slow).</p>
    537. 

  537. </div>
    538. 

  538. </div>
    539. 

  539. </div>
    540. 

  540. <div class="sect1">
    541. 

  541. <h2 id="sample-code">Sample Code</h2>
    542. 

  542. <div class="sectionbody">
    543. 

  543. <div class="ulist">
    544. 

  544. <ul>
    545. 

  545. <li>
    546. 

  546. <p><a href="https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/tools/TestSaveGame.java">TestSaveGame.java</a></p>
    547. 

  547. </li>
    548. 

  548. </ul>
    549. 

  549. </div>
    550. 

  550. </div>
    551. 

  551. </div>
    552. 

  552. <div class="sect1">
    553. 

  553. <h2 id="saving-a-node">Saving a Node</h2>
    554. 

  554. <div class="sectionbody">
    555. 

  555. <div class="paragraph">
    556. 

  556. <p>The following example overrides <code>stop()</code> in SimpleApplication to save the rootNode to a file when the user quits the application. The saved rootNode is a normal .j3o binary file that you can open in the <a href="sdk.html">SDK</a>.</p>
    557. 

  557. </div>
    558. 

  558. <div class="paragraph">
    559. 

  559. <p><code>assets</code></p>
    560. 

  560. </div>
    561. 

  561. <div class="listingblock">
    562. 

  562. <div class="content">
    563. 

  563. <pre class="CodeRay highlight"><code data-lang="java">  <span class="comment">/* This is called when the user quits the app. */</span>
    564. 

  564.   <span class="annotation">@Override</span>
    565. 

  565.   <span class="directive">public</span> <span class="type">void</span> stop() {
    566. 

  566.     <span class="predefined-type">String</span> userHome = <span class="predefined-type">System</span>.getProperty(<span class="string"><span class="delimiter">&quot;</span><span class="content">user.home</span><span class="delimiter">&quot;</span></span>);
    567. 

  567.     BinaryExporter exporter = BinaryExporter.getInstance();
    568. 

  568.     <span class="predefined-type">File</span> file = <span class="keyword">new</span> <span class="predefined-type">File</span>(userHome+<span class="string"><span class="delimiter">&quot;</span><span class="content">/Models/</span><span class="delimiter">&quot;</span></span>+<span class="string"><span class="delimiter">&quot;</span><span class="content">MyModel.j3o</span><span class="delimiter">&quot;</span></span>);
    569. 

  569.     <span class="keyword">try</span> {
    570. 

  570.       exporter.save(rootNode, file);
    571. 

  571.     } <span class="keyword">catch</span> (<span class="exception">IOException</span> ex) {
    572. 

  572.       <span class="predefined-type">Logger</span>.getLogger(Main.class.getName()).log(<span class="predefined-type">Level</span>.SEVERE, <span class="string"><span class="delimiter">&quot;</span><span class="content">Error: Failed to save game!</span><span class="delimiter">&quot;</span></span>, ex);
    573. 

  573.     }
    574. 

  574.     <span class="local-variable">super</span>.stop(); <span class="comment">// continue quitting the game</span>
    575. 

  575.   }----
    576. 

  576. 

  577. == Loading a Node
    578. 

  578. 

  579. The following example overrides <span class="error">`</span>simpleInitApp()<span class="error">`</span> in SimpleApplication to load <span class="error">`</span>Models/MyModel.j3o<span class="error">`</span> when the game is initialized.
    580. 

  580. 

  581. 

  582. [source,java]
    583. 

  583. ----  <span class="annotation">@Override</span>
    584. 

  584.   <span class="directive">public</span> <span class="type">void</span> simpleInitApp() {
    585. 

  585.      <span class="predefined-type">String</span> userHome = <span class="predefined-type">System</span>.getProperty(<span class="string"><span class="delimiter">&quot;</span><span class="content">user.home</span><span class="delimiter">&quot;</span></span>);
    586. 

  586.      assetManager.registerLocator(userHome, FileLocator.class);
    587. 

  587.      Node loadedNode = (Node)assetManager.loadModel(<span class="string"><span class="delimiter">&quot;</span><span class="content">Models/MyModel.j3o</span><span class="delimiter">&quot;</span></span>);
    588. 

  588.      loadedNode.setName(<span class="string"><span class="delimiter">&quot;</span><span class="content">loaded node</span><span class="delimiter">&quot;</span></span>);
    589. 

  589.      rootNode.attachChild(loadedNode);
    590. 

  590.   }
    591. 

  591.    ----
    592. 

  592. <span class="error">–</span>
    593. 

  593. 

  594. 

  595. 

  596. == Custom Savable <span class="predefined-type">Class</span>
    597. 

  597. 

  598. JME<span class="string"><span class="delimiter">'</span><span class="content">s BinaryExporter can write standard Java objects (String, ArrayList, buffers, etc), JME objects (Savables, such as Material), and primitive data types (int, float, etc). If you are using any custom class together with a Spatial, then the custom class must implement the `com.jme3.export.Savable` interface. There are two common cases where this is relevant:
    599. 

  599. 

  600. 

  601. *  The Spatial is carrying any &lt;&lt;jme3/advanced/custom_controls#,Custom Controls&gt;&gt;. +
    602. 

  602. Example: You used something like `mySpatial.addControl(myControl);`
    603. 

  603. *  The Spatial</span><span class="delimiter">'</span></span>s user data can contain a custom Java object. +
    604. 

  604. Example: You used something like <span class="error">`</span>mySpatial.setUserData(<span class="error">“</span>inventory, myInventory);<span class="error">`</span>
    605. 

  605. 

  606. If your custom classes (the user data or the Controls) <span class="keyword">do</span> not implement Savable, then the BinaryImporter/BinaryExporter cannot save the Spatial!
    607. 

  607. 

  608. 

  609. So every time you create a custom <span class="predefined-type">Control</span> or custom user data <span class="type">class</span>, <span class="class">remember</span> to implement Savable:
    610. 

  610. 

  611. 

  612. [source,java]</code></pre>
    613. 

  613. </div>
    614. 

  614. </div>
    615. 

  615. <div class="paragraph">
    616. 

  616. <p>import com.jme3.export.InputCapsule;
    617. 

  617. import com.jme3.export.JmeExporter;
    618. 

  618. import com.jme3.export.JmeImporter;
    619. 

  619. import com.jme3.export.OutputCapsule;
    620. 

  620. import com.jme3.export.Savable;
    621. 

  621. import com.jme3.material.Material;
    622. 

  622. import java.io.IOException;</p>
    623. 

  623. </div>
    624. 

  624. <div class="paragraph">
    625. 

  625. <p>public class MyCustomClass implements Savable {
    626. 

  626.     private int      someIntValue;   // some custom user data
    627. 

  627.     private float    someFloatValue; // some custom user data
    628. 

  628.     private Material someJmeObject;  // some custom user data</p>
    629. 

  629. </div>
    630. 

  630. <div class="literalblock">
    631. 

  631. <div class="content">
    632. 

  632. <pre>...
    633. 

  633. // your other code...
    634. 

  634. ...</pre>
    635. 

  635. </div>
    636. 

  636. </div>
    637. 

  637. <div class="literalblock">
    638. 

  638. <div class="content">
    639. 

  639. <pre>public void write(JmeExporter ex) throws IOException {
    640. 

  640.     OutputCapsule capsule = ex.getCapsule(this);
    641. 

  641.     capsule.write(someIntValue,   "someIntValue",   1);
    642. 

  642.     capsule.write(someFloatValue, "someFloatValue", 0f);
    643. 

  643.     capsule.write(someJmeObject,  "someJmeObject",  new Material());
    644. 

  644. }</pre>
    645. 

  645. </div>
    646. 

  646. </div>
    647. 

  647. <div class="literalblock">
    648. 

  648. <div class="content">
    649. 

  649. <pre>    public void read(JmeImporter im) throws IOException {
    650. 

  650.         InputCapsule capsule = im.getCapsule(this);
    651. 

  651.         someIntValue   = capsule.readInt(    "someIntValue",   1);
    652. 

  652.         someFloatValue = capsule.readFloat(  "someFloatValue", 0f);
    653. 

  653.         someJmeObject  = capsule.readSavable("someJmeObject",  new Material());
    654. 

  654.     }
    655. 

  655. }</pre>
    656. 

  656. </div>
    657. 

  657. </div>
    658. 

  658. <div class="listingblock">
    659. 

  659. <div class="content">
    660. 

  660. <pre>To make a custom class savable:
    661. 

  661. 

  662. 

  663. .  Implement `Savable` and add the `write()` and `read()` methods as shown in the example above.
    664. 

  664. .  Do the following for each non-temporary class field:
    665. 

  665. **  Add one line that `write()`s the data to the JmeExport output capsule.
    666. 

  666. ***  Specify the variable to save, give it a String name (can be the same as the variable name), and specify a default value.
    667. 

  667. 

  668. **  Add one line that `read…()`s the data to the JmeImport input capsule.
    669. 

  669. ***  On the left side of the assignment, specify the class field that you are restoring
    670. 

  670. ***  On the right side, use the appropriate `capsule.read…()` method for the data type. Specify the String name of the variable (must be the same as you used in the `write() method`), and again specify a default value.
    671. 

  671. 

  672. 

  673. 

  674. 

  675. 

  676. &lt;tags&gt;&lt;tag target="convert" /&gt;&lt;tag target="j3o" /&gt;&lt;tag target="models" /&gt;&lt;tag target="load" /&gt;&lt;tag target="save" /&gt;&lt;tag target="documentation" /&gt;&lt;tag target="serialization" /&gt;&lt;tag target="import" /&gt;&lt;tag target="export" /&gt;&lt;tag target="spatial" /&gt;&lt;tag target="node" /&gt;&lt;tag target="mesh" /&gt;&lt;tag target="geometry" /&gt;&lt;tag target="scenegraph" /&gt;&lt;tag target="sdk" /&gt;&lt;/tags&gt;</pre>
    677. 

  677. </div>
    678. 

  678. </div>
    679. 

  679. </div>
    680. 

  680. </div>
    681. 

  681. </div>
    682. 

  682. <div id="footer">
    683. 

  683. <div id="footer-text">
    684. 

  684. Last updated 2016-05-21 23:44:18 UTC
    685. 

  685. </div>
    686. 

  686. </div>
    687. 

  687. </body>
    688. 

  688. </html>
    689.