SVGLoader.js 48 KB

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  1. console.warn( "THREE.SVGLoader: As part of the transition to ES6 Modules, the files in 'examples/js' have been deprecated in r117 (May 2020) and will be deleted in r124 (December 2020). You can find more information about developing using ES6 Modules in https://threejs.org/docs/index.html#manual/en/introduction/Import-via-modules." );
  2. /**
  3. * @author mrdoob / http://mrdoob.com/
  4. * @author zz85 / http://joshuakoo.com/
  5. * @author yomboprime / https://yombo.org
  6. */
  7. THREE.SVGLoader = function ( manager ) {
  8. THREE.Loader.call( this, manager );
  9. // Default dots per inch
  10. this.defaultDPI = 90;
  11. // Accepted units: 'mm', 'cm', 'in', 'pt', 'pc', 'px'
  12. this.defaultUnit = "px";
  13. };
  14. THREE.SVGLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {
  15. constructor: THREE.SVGLoader,
  16. load: function ( url, onLoad, onProgress, onError ) {
  17. var scope = this;
  18. var loader = new THREE.FileLoader( scope.manager );
  19. loader.setPath( scope.path );
  20. loader.load( url, function ( text ) {
  21. try {
  22. onLoad( scope.parse( text ) );
  23. } catch ( e ) {
  24. if ( onError ) {
  25. onError( e );
  26. } else {
  27. console.error( e );
  28. }
  29. scope.manager.itemError( url );
  30. }
  31. }, onProgress, onError );
  32. },
  33. parse: function ( text ) {
  34. var scope = this;
  35. function parseNode( node, style ) {
  36. if ( node.nodeType !== 1 ) return;
  37. var transform = getNodeTransform( node );
  38. var path = null;
  39. switch ( node.nodeName ) {
  40. case 'svg':
  41. break;
  42. case 'style':
  43. parseCSSStylesheet( node );
  44. break;
  45. case 'g':
  46. style = parseStyle( node, style );
  47. break;
  48. case 'path':
  49. style = parseStyle( node, style );
  50. if ( node.hasAttribute( 'd' ) ) path = parsePathNode( node );
  51. break;
  52. case 'rect':
  53. style = parseStyle( node, style );
  54. path = parseRectNode( node );
  55. break;
  56. case 'polygon':
  57. style = parseStyle( node, style );
  58. path = parsePolygonNode( node );
  59. break;
  60. case 'polyline':
  61. style = parseStyle( node, style );
  62. path = parsePolylineNode( node );
  63. break;
  64. case 'circle':
  65. style = parseStyle( node, style );
  66. path = parseCircleNode( node );
  67. break;
  68. case 'ellipse':
  69. style = parseStyle( node, style );
  70. path = parseEllipseNode( node );
  71. break;
  72. case 'line':
  73. style = parseStyle( node, style );
  74. path = parseLineNode( node );
  75. break;
  76. default:
  77. // console.log( node );
  78. }
  79. if ( path ) {
  80. if ( style.fill !== undefined && style.fill !== 'none' ) {
  81. path.color.setStyle( style.fill );
  82. }
  83. transformPath( path, currentTransform );
  84. paths.push( path );
  85. path.userData = { node: node, style: style };
  86. }
  87. var nodes = node.childNodes;
  88. for ( var i = 0; i < nodes.length; i ++ ) {
  89. parseNode( nodes[ i ], style );
  90. }
  91. if ( transform ) {
  92. transformStack.pop();
  93. if ( transformStack.length > 0 ) {
  94. currentTransform.copy( transformStack[ transformStack.length - 1 ] );
  95. } else {
  96. currentTransform.identity();
  97. }
  98. }
  99. }
  100. function parsePathNode( node ) {
  101. var path = new THREE.ShapePath();
  102. var point = new THREE.Vector2();
  103. var control = new THREE.Vector2();
  104. var firstPoint = new THREE.Vector2();
  105. var isFirstPoint = true;
  106. var doSetFirstPoint = false;
  107. var d = node.getAttribute( 'd' );
  108. // console.log( d );
  109. var commands = d.match( /[a-df-z][^a-df-z]*/ig );
  110. for ( var i = 0, l = commands.length; i < l; i ++ ) {
  111. var command = commands[ i ];
  112. var type = command.charAt( 0 );
  113. var data = command.substr( 1 ).trim();
  114. if ( isFirstPoint === true ) {
  115. doSetFirstPoint = true;
  116. isFirstPoint = false;
  117. }
  118. switch ( type ) {
  119. case 'M':
  120. var numbers = parseFloats( data );
  121. for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
  122. point.x = numbers[ j + 0 ];
  123. point.y = numbers[ j + 1 ];
  124. control.x = point.x;
  125. control.y = point.y;
  126. if ( j === 0 ) {
  127. path.moveTo( point.x, point.y );
  128. } else {
  129. path.lineTo( point.x, point.y );
  130. }
  131. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  132. }
  133. break;
  134. case 'H':
  135. var numbers = parseFloats( data );
  136. for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
  137. point.x = numbers[ j ];
  138. control.x = point.x;
  139. control.y = point.y;
  140. path.lineTo( point.x, point.y );
  141. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  142. }
  143. break;
  144. case 'V':
  145. var numbers = parseFloats( data );
  146. for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
  147. point.y = numbers[ j ];
  148. control.x = point.x;
  149. control.y = point.y;
  150. path.lineTo( point.x, point.y );
  151. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  152. }
  153. break;
  154. case 'L':
  155. var numbers = parseFloats( data );
  156. for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
  157. point.x = numbers[ j + 0 ];
  158. point.y = numbers[ j + 1 ];
  159. control.x = point.x;
  160. control.y = point.y;
  161. path.lineTo( point.x, point.y );
  162. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  163. }
  164. break;
  165. case 'C':
  166. var numbers = parseFloats( data );
  167. for ( var j = 0, jl = numbers.length; j < jl; j += 6 ) {
  168. path.bezierCurveTo(
  169. numbers[ j + 0 ],
  170. numbers[ j + 1 ],
  171. numbers[ j + 2 ],
  172. numbers[ j + 3 ],
  173. numbers[ j + 4 ],
  174. numbers[ j + 5 ]
  175. );
  176. control.x = numbers[ j + 2 ];
  177. control.y = numbers[ j + 3 ];
  178. point.x = numbers[ j + 4 ];
  179. point.y = numbers[ j + 5 ];
  180. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  181. }
  182. break;
  183. case 'S':
  184. var numbers = parseFloats( data );
  185. for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
  186. path.bezierCurveTo(
  187. getReflection( point.x, control.x ),
  188. getReflection( point.y, control.y ),
  189. numbers[ j + 0 ],
  190. numbers[ j + 1 ],
  191. numbers[ j + 2 ],
  192. numbers[ j + 3 ]
  193. );
  194. control.x = numbers[ j + 0 ];
  195. control.y = numbers[ j + 1 ];
  196. point.x = numbers[ j + 2 ];
  197. point.y = numbers[ j + 3 ];
  198. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  199. }
  200. break;
  201. case 'Q':
  202. var numbers = parseFloats( data );
  203. for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
  204. path.quadraticCurveTo(
  205. numbers[ j + 0 ],
  206. numbers[ j + 1 ],
  207. numbers[ j + 2 ],
  208. numbers[ j + 3 ]
  209. );
  210. control.x = numbers[ j + 0 ];
  211. control.y = numbers[ j + 1 ];
  212. point.x = numbers[ j + 2 ];
  213. point.y = numbers[ j + 3 ];
  214. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  215. }
  216. break;
  217. case 'T':
  218. var numbers = parseFloats( data );
  219. for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
  220. var rx = getReflection( point.x, control.x );
  221. var ry = getReflection( point.y, control.y );
  222. path.quadraticCurveTo(
  223. rx,
  224. ry,
  225. numbers[ j + 0 ],
  226. numbers[ j + 1 ]
  227. );
  228. control.x = rx;
  229. control.y = ry;
  230. point.x = numbers[ j + 0 ];
  231. point.y = numbers[ j + 1 ];
  232. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  233. }
  234. break;
  235. case 'A':
  236. var numbers = parseFloats( data );
  237. for ( var j = 0, jl = numbers.length; j < jl; j += 7 ) {
  238. var start = point.clone();
  239. point.x = numbers[ j + 5 ];
  240. point.y = numbers[ j + 6 ];
  241. control.x = point.x;
  242. control.y = point.y;
  243. parseArcCommand(
  244. path, numbers[ j ], numbers[ j + 1 ], numbers[ j + 2 ], numbers[ j + 3 ], numbers[ j + 4 ], start, point
  245. );
  246. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  247. }
  248. break;
  249. case 'm':
  250. var numbers = parseFloats( data );
  251. for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
  252. point.x += numbers[ j + 0 ];
  253. point.y += numbers[ j + 1 ];
  254. control.x = point.x;
  255. control.y = point.y;
  256. if ( j === 0 ) {
  257. path.moveTo( point.x, point.y );
  258. } else {
  259. path.lineTo( point.x, point.y );
  260. }
  261. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  262. }
  263. break;
  264. case 'h':
  265. var numbers = parseFloats( data );
  266. for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
  267. point.x += numbers[ j ];
  268. control.x = point.x;
  269. control.y = point.y;
  270. path.lineTo( point.x, point.y );
  271. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  272. }
  273. break;
  274. case 'v':
  275. var numbers = parseFloats( data );
  276. for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
  277. point.y += numbers[ j ];
  278. control.x = point.x;
  279. control.y = point.y;
  280. path.lineTo( point.x, point.y );
  281. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  282. }
  283. break;
  284. case 'l':
  285. var numbers = parseFloats( data );
  286. for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
  287. point.x += numbers[ j + 0 ];
  288. point.y += numbers[ j + 1 ];
  289. control.x = point.x;
  290. control.y = point.y;
  291. path.lineTo( point.x, point.y );
  292. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  293. }
  294. break;
  295. case 'c':
  296. var numbers = parseFloats( data );
  297. for ( var j = 0, jl = numbers.length; j < jl; j += 6 ) {
  298. path.bezierCurveTo(
  299. point.x + numbers[ j + 0 ],
  300. point.y + numbers[ j + 1 ],
  301. point.x + numbers[ j + 2 ],
  302. point.y + numbers[ j + 3 ],
  303. point.x + numbers[ j + 4 ],
  304. point.y + numbers[ j + 5 ]
  305. );
  306. control.x = point.x + numbers[ j + 2 ];
  307. control.y = point.y + numbers[ j + 3 ];
  308. point.x += numbers[ j + 4 ];
  309. point.y += numbers[ j + 5 ];
  310. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  311. }
  312. break;
  313. case 's':
  314. var numbers = parseFloats( data );
  315. for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
  316. path.bezierCurveTo(
  317. getReflection( point.x, control.x ),
  318. getReflection( point.y, control.y ),
  319. point.x + numbers[ j + 0 ],
  320. point.y + numbers[ j + 1 ],
  321. point.x + numbers[ j + 2 ],
  322. point.y + numbers[ j + 3 ]
  323. );
  324. control.x = point.x + numbers[ j + 0 ];
  325. control.y = point.y + numbers[ j + 1 ];
  326. point.x += numbers[ j + 2 ];
  327. point.y += numbers[ j + 3 ];
  328. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  329. }
  330. break;
  331. case 'q':
  332. var numbers = parseFloats( data );
  333. for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
  334. path.quadraticCurveTo(
  335. point.x + numbers[ j + 0 ],
  336. point.y + numbers[ j + 1 ],
  337. point.x + numbers[ j + 2 ],
  338. point.y + numbers[ j + 3 ]
  339. );
  340. control.x = point.x + numbers[ j + 0 ];
  341. control.y = point.y + numbers[ j + 1 ];
  342. point.x += numbers[ j + 2 ];
  343. point.y += numbers[ j + 3 ];
  344. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  345. }
  346. break;
  347. case 't':
  348. var numbers = parseFloats( data );
  349. for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
  350. var rx = getReflection( point.x, control.x );
  351. var ry = getReflection( point.y, control.y );
  352. path.quadraticCurveTo(
  353. rx,
  354. ry,
  355. point.x + numbers[ j + 0 ],
  356. point.y + numbers[ j + 1 ]
  357. );
  358. control.x = rx;
  359. control.y = ry;
  360. point.x = point.x + numbers[ j + 0 ];
  361. point.y = point.y + numbers[ j + 1 ];
  362. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  363. }
  364. break;
  365. case 'a':
  366. var numbers = parseFloats( data );
  367. for ( var j = 0, jl = numbers.length; j < jl; j += 7 ) {
  368. var start = point.clone();
  369. point.x += numbers[ j + 5 ];
  370. point.y += numbers[ j + 6 ];
  371. control.x = point.x;
  372. control.y = point.y;
  373. parseArcCommand(
  374. path, numbers[ j ], numbers[ j + 1 ], numbers[ j + 2 ], numbers[ j + 3 ], numbers[ j + 4 ], start, point
  375. );
  376. if ( j === 0 && doSetFirstPoint === true ) firstPoint.copy( point );
  377. }
  378. break;
  379. case 'Z':
  380. case 'z':
  381. path.currentPath.autoClose = true;
  382. if ( path.currentPath.curves.length > 0 ) {
  383. // Reset point to beginning of Path
  384. point.copy( firstPoint );
  385. path.currentPath.currentPoint.copy( point );
  386. isFirstPoint = true;
  387. }
  388. break;
  389. default:
  390. console.warn( command );
  391. }
  392. // console.log( type, parseFloats( data ), parseFloats( data ).length )
  393. doSetFirstPoint = false;
  394. }
  395. return path;
  396. }
  397. function parseCSSStylesheet( node ) {
  398. if ( ! node.sheet || ! node.sheet.cssRules || ! node.sheet.cssRules.length ) return;
  399. for ( var i = 0; i < node.sheet.cssRules.length; i ++ ) {
  400. var stylesheet = node.sheet.cssRules[ i ];
  401. if ( stylesheet.type !== 1 ) continue;
  402. var selectorList = stylesheet.selectorText
  403. .split( /,/gm )
  404. .filter( Boolean )
  405. .map( i => i.trim() );
  406. for ( var j = 0; j < selectorList.length; j ++ ) {
  407. stylesheets[ selectorList[ j ] ] = Object.assign(
  408. stylesheets[ selectorList[ j ] ] || {},
  409. stylesheet.style
  410. );
  411. }
  412. }
  413. }
  414. /**
  415. * https://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
  416. * https://mortoray.com/2017/02/16/rendering-an-svg-elliptical-arc-as-bezier-curves/ Appendix: Endpoint to center arc conversion
  417. * From
  418. * rx ry x-axis-rotation large-arc-flag sweep-flag x y
  419. * To
  420. * aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation
  421. */
  422. function parseArcCommand( path, rx, ry, x_axis_rotation, large_arc_flag, sweep_flag, start, end ) {
  423. x_axis_rotation = x_axis_rotation * Math.PI / 180;
  424. // Ensure radii are positive
  425. rx = Math.abs( rx );
  426. ry = Math.abs( ry );
  427. // Compute (x1′, y1′)
  428. var dx2 = ( start.x - end.x ) / 2.0;
  429. var dy2 = ( start.y - end.y ) / 2.0;
  430. var x1p = Math.cos( x_axis_rotation ) * dx2 + Math.sin( x_axis_rotation ) * dy2;
  431. var y1p = - Math.sin( x_axis_rotation ) * dx2 + Math.cos( x_axis_rotation ) * dy2;
  432. // Compute (cx′, cy′)
  433. var rxs = rx * rx;
  434. var rys = ry * ry;
  435. var x1ps = x1p * x1p;
  436. var y1ps = y1p * y1p;
  437. // Ensure radii are large enough
  438. var cr = x1ps / rxs + y1ps / rys;
  439. if ( cr > 1 ) {
  440. // scale up rx,ry equally so cr == 1
  441. var s = Math.sqrt( cr );
  442. rx = s * rx;
  443. ry = s * ry;
  444. rxs = rx * rx;
  445. rys = ry * ry;
  446. }
  447. var dq = ( rxs * y1ps + rys * x1ps );
  448. var pq = ( rxs * rys - dq ) / dq;
  449. var q = Math.sqrt( Math.max( 0, pq ) );
  450. if ( large_arc_flag === sweep_flag ) q = - q;
  451. var cxp = q * rx * y1p / ry;
  452. var cyp = - q * ry * x1p / rx;
  453. // Step 3: Compute (cx, cy) from (cx′, cy′)
  454. var cx = Math.cos( x_axis_rotation ) * cxp - Math.sin( x_axis_rotation ) * cyp + ( start.x + end.x ) / 2;
  455. var cy = Math.sin( x_axis_rotation ) * cxp + Math.cos( x_axis_rotation ) * cyp + ( start.y + end.y ) / 2;
  456. // Step 4: Compute θ1 and Δθ
  457. var theta = svgAngle( 1, 0, ( x1p - cxp ) / rx, ( y1p - cyp ) / ry );
  458. var delta = svgAngle( ( x1p - cxp ) / rx, ( y1p - cyp ) / ry, ( - x1p - cxp ) / rx, ( - y1p - cyp ) / ry ) % ( Math.PI * 2 );
  459. path.currentPath.absellipse( cx, cy, rx, ry, theta, theta + delta, sweep_flag === 0, x_axis_rotation );
  460. }
  461. function svgAngle( ux, uy, vx, vy ) {
  462. var dot = ux * vx + uy * vy;
  463. var len = Math.sqrt( ux * ux + uy * uy ) * Math.sqrt( vx * vx + vy * vy );
  464. var ang = Math.acos( Math.max( - 1, Math.min( 1, dot / len ) ) ); // floating point precision, slightly over values appear
  465. if ( ( ux * vy - uy * vx ) < 0 ) ang = - ang;
  466. return ang;
  467. }
  468. /*
  469. * According to https://www.w3.org/TR/SVG/shapes.html#RectElementRXAttribute
  470. * rounded corner should be rendered to elliptical arc, but bezier curve does the job well enough
  471. */
  472. function parseRectNode( node ) {
  473. var x = parseFloatWithUnits( node.getAttribute( 'x' ) || 0 );
  474. var y = parseFloatWithUnits( node.getAttribute( 'y' ) || 0 );
  475. var rx = parseFloatWithUnits( node.getAttribute( 'rx' ) || 0 );
  476. var ry = parseFloatWithUnits( node.getAttribute( 'ry' ) || 0 );
  477. var w = parseFloatWithUnits( node.getAttribute( 'width' ) );
  478. var h = parseFloatWithUnits( node.getAttribute( 'height' ) );
  479. var path = new THREE.ShapePath();
  480. path.moveTo( x + 2 * rx, y );
  481. path.lineTo( x + w - 2 * rx, y );
  482. if ( rx !== 0 || ry !== 0 ) path.bezierCurveTo( x + w, y, x + w, y, x + w, y + 2 * ry );
  483. path.lineTo( x + w, y + h - 2 * ry );
  484. if ( rx !== 0 || ry !== 0 ) path.bezierCurveTo( x + w, y + h, x + w, y + h, x + w - 2 * rx, y + h );
  485. path.lineTo( x + 2 * rx, y + h );
  486. if ( rx !== 0 || ry !== 0 ) {
  487. path.bezierCurveTo( x, y + h, x, y + h, x, y + h - 2 * ry );
  488. }
  489. path.lineTo( x, y + 2 * ry );
  490. if ( rx !== 0 || ry !== 0 ) {
  491. path.bezierCurveTo( x, y, x, y, x + 2 * rx, y );
  492. }
  493. return path;
  494. }
  495. function parsePolygonNode( node ) {
  496. function iterator( match, a, b ) {
  497. var x = parseFloatWithUnits( a );
  498. var y = parseFloatWithUnits( b );
  499. if ( index === 0 ) {
  500. path.moveTo( x, y );
  501. } else {
  502. path.lineTo( x, y );
  503. }
  504. index ++;
  505. }
  506. var regex = /(-?[\d\.?]+)[,|\s](-?[\d\.?]+)/g;
  507. var path = new THREE.ShapePath();
  508. var index = 0;
  509. node.getAttribute( 'points' ).replace( regex, iterator );
  510. path.currentPath.autoClose = true;
  511. return path;
  512. }
  513. function parsePolylineNode( node ) {
  514. function iterator( match, a, b ) {
  515. var x = parseFloatWithUnits( a );
  516. var y = parseFloatWithUnits( b );
  517. if ( index === 0 ) {
  518. path.moveTo( x, y );
  519. } else {
  520. path.lineTo( x, y );
  521. }
  522. index ++;
  523. }
  524. var regex = /(-?[\d\.?]+)[,|\s](-?[\d\.?]+)/g;
  525. var path = new THREE.ShapePath();
  526. var index = 0;
  527. node.getAttribute( 'points' ).replace( regex, iterator );
  528. path.currentPath.autoClose = false;
  529. return path;
  530. }
  531. function parseCircleNode( node ) {
  532. var x = parseFloatWithUnits( node.getAttribute( 'cx' ) );
  533. var y = parseFloatWithUnits( node.getAttribute( 'cy' ) );
  534. var r = parseFloatWithUnits( node.getAttribute( 'r' ) );
  535. var subpath = new THREE.Path();
  536. subpath.absarc( x, y, r, 0, Math.PI * 2 );
  537. var path = new THREE.ShapePath();
  538. path.subPaths.push( subpath );
  539. return path;
  540. }
  541. function parseEllipseNode( node ) {
  542. var x = parseFloatWithUnits( node.getAttribute( 'cx' ) );
  543. var y = parseFloatWithUnits( node.getAttribute( 'cy' ) );
  544. var rx = parseFloatWithUnits( node.getAttribute( 'rx' ) );
  545. var ry = parseFloatWithUnits( node.getAttribute( 'ry' ) );
  546. var subpath = new THREE.Path();
  547. subpath.absellipse( x, y, rx, ry, 0, Math.PI * 2 );
  548. var path = new THREE.ShapePath();
  549. path.subPaths.push( subpath );
  550. return path;
  551. }
  552. function parseLineNode( node ) {
  553. var x1 = parseFloatWithUnits( node.getAttribute( 'x1' ) );
  554. var y1 = parseFloatWithUnits( node.getAttribute( 'y1' ) );
  555. var x2 = parseFloatWithUnits( node.getAttribute( 'x2' ) );
  556. var y2 = parseFloatWithUnits( node.getAttribute( 'y2' ) );
  557. var path = new THREE.ShapePath();
  558. path.moveTo( x1, y1 );
  559. path.lineTo( x2, y2 );
  560. path.currentPath.autoClose = false;
  561. return path;
  562. }
  563. //
  564. function parseStyle( node, style ) {
  565. style = Object.assign( {}, style ); // clone style
  566. var stylesheetStyles = {};
  567. if ( node.hasAttribute( 'class' ) ) {
  568. var classSelectors = node.getAttribute( 'class' )
  569. .split( /\s/ )
  570. .filter( Boolean )
  571. .map( i => i.trim() );
  572. for ( var i = 0; i < classSelectors.length; i ++ ) {
  573. stylesheetStyles = Object.assign( stylesheetStyles, stylesheets[ '.' + classSelectors[ i ] ] );
  574. }
  575. }
  576. if ( node.hasAttribute( 'id' ) ) {
  577. stylesheetStyles = Object.assign( stylesheetStyles, stylesheets[ '#' + node.getAttribute( 'id' ) ] );
  578. }
  579. function addStyle( svgName, jsName, adjustFunction ) {
  580. if ( adjustFunction === undefined ) adjustFunction = function copy( v ) {
  581. return v;
  582. };
  583. if ( node.hasAttribute( svgName ) ) style[ jsName ] = adjustFunction( node.getAttribute( svgName ) );
  584. if ( stylesheetStyles[ svgName ] ) style[ jsName ] = adjustFunction( stylesheetStyles[ svgName ] );
  585. if ( node.style && node.style[ svgName ] !== '' ) style[ jsName ] = adjustFunction( node.style[ svgName ] );
  586. }
  587. function clamp( v ) {
  588. return Math.max( 0, Math.min( 1, parseFloatWithUnits( v ) ) );
  589. }
  590. function positive( v ) {
  591. return Math.max( 0, parseFloatWithUnits( v ) );
  592. }
  593. addStyle( 'fill', 'fill' );
  594. addStyle( 'fill-opacity', 'fillOpacity', clamp );
  595. addStyle( 'opacity', 'opacity', clamp );
  596. addStyle( 'stroke', 'stroke' );
  597. addStyle( 'stroke-opacity', 'strokeOpacity', clamp );
  598. addStyle( 'stroke-width', 'strokeWidth', positive );
  599. addStyle( 'stroke-linejoin', 'strokeLineJoin' );
  600. addStyle( 'stroke-linecap', 'strokeLineCap' );
  601. addStyle( 'stroke-miterlimit', 'strokeMiterLimit', positive );
  602. addStyle( 'visibility', 'visibility' );
  603. return style;
  604. }
  605. // http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes
  606. function getReflection( a, b ) {
  607. return a - ( b - a );
  608. }
  609. function parseFloats( string ) {
  610. var array = string.split( /[\s,]+|(?=\s?[+\-])/ );
  611. for ( var i = 0; i < array.length; i ++ ) {
  612. var number = array[ i ];
  613. // Handle values like 48.6037.7.8
  614. // TODO Find a regex for this
  615. if ( number.indexOf( '.' ) !== number.lastIndexOf( '.' ) ) {
  616. var split = number.split( '.' );
  617. for ( var s = 2; s < split.length; s ++ ) {
  618. array.splice( i + s - 1, 0, '0.' + split[ s ] );
  619. }
  620. }
  621. array[ i ] = parseFloatWithUnits( number );
  622. }
  623. return array;
  624. }
  625. // Units
  626. var units = [ 'mm', 'cm', 'in', 'pt', 'pc', 'px' ];
  627. // Conversion: [ fromUnit ][ toUnit ] (-1 means dpi dependent)
  628. var unitConversion = {
  629. "mm": {
  630. "mm": 1,
  631. "cm": 0.1,
  632. "in": 1 / 25.4,
  633. "pt": 72 / 25.4,
  634. "pc": 6 / 25.4,
  635. "px": - 1
  636. },
  637. "cm": {
  638. "mm": 10,
  639. "cm": 1,
  640. "in": 1 / 2.54,
  641. "pt": 72 / 2.54,
  642. "pc": 6 / 2.54,
  643. "px": - 1
  644. },
  645. "in": {
  646. "mm": 25.4,
  647. "cm": 2.54,
  648. "in": 1,
  649. "pt": 72,
  650. "pc": 6,
  651. "px": - 1
  652. },
  653. "pt": {
  654. "mm": 25.4 / 72,
  655. "cm": 2.54 / 72,
  656. "in": 1 / 72,
  657. "pt": 1,
  658. "pc": 6 / 72,
  659. "px": - 1
  660. },
  661. "pc": {
  662. "mm": 25.4 / 6,
  663. "cm": 2.54 / 6,
  664. "in": 1 / 6,
  665. "pt": 72 / 6,
  666. "pc": 1,
  667. "px": - 1
  668. },
  669. "px": {
  670. "px": 1
  671. }
  672. };
  673. function parseFloatWithUnits( string ) {
  674. var theUnit = "px";
  675. if ( typeof string === 'string' || string instanceof String ) {
  676. for ( var i = 0, n = units.length; i < n; i ++ ) {
  677. var u = units[ i ];
  678. if ( string.endsWith( u ) ) {
  679. theUnit = u;
  680. string = string.substring( 0, string.length - u.length );
  681. break;
  682. }
  683. }
  684. }
  685. var scale = undefined;
  686. if ( theUnit === "px" && scope.defaultUnit !== "px" ) {
  687. // Conversion scale from pixels to inches, then to default units
  688. scale = unitConversion[ "in" ][ scope.defaultUnit ] / scope.defaultDPI;
  689. } else {
  690. scale = unitConversion[ theUnit ][ scope.defaultUnit ];
  691. if ( scale < 0 ) {
  692. // Conversion scale to pixels
  693. scale = unitConversion[ theUnit ][ "in" ] * scope.defaultDPI;
  694. }
  695. }
  696. return scale * parseFloat( string );
  697. }
  698. // Transforms
  699. function getNodeTransform( node ) {
  700. if ( ! node.hasAttribute( 'transform' ) ) {
  701. return null;
  702. }
  703. var transform = parseNodeTransform( node );
  704. if ( transformStack.length > 0 ) {
  705. transform.premultiply( transformStack[ transformStack.length - 1 ] );
  706. }
  707. currentTransform.copy( transform );
  708. transformStack.push( transform );
  709. return transform;
  710. }
  711. function parseNodeTransform( node ) {
  712. var transform = new THREE.Matrix3();
  713. var currentTransform = tempTransform0;
  714. var transformsTexts = node.getAttribute( 'transform' ).split( ')' );
  715. for ( var tIndex = transformsTexts.length - 1; tIndex >= 0; tIndex -- ) {
  716. var transformText = transformsTexts[ tIndex ].trim();
  717. if ( transformText === '' ) continue;
  718. var openParPos = transformText.indexOf( '(' );
  719. var closeParPos = transformText.length;
  720. if ( openParPos > 0 && openParPos < closeParPos ) {
  721. var transformType = transformText.substr( 0, openParPos );
  722. var array = parseFloats( transformText.substr( openParPos + 1, closeParPos - openParPos - 1 ) );
  723. currentTransform.identity();
  724. switch ( transformType ) {
  725. case "translate":
  726. if ( array.length >= 1 ) {
  727. var tx = array[ 0 ];
  728. var ty = tx;
  729. if ( array.length >= 2 ) {
  730. ty = array[ 1 ];
  731. }
  732. currentTransform.translate( tx, ty );
  733. }
  734. break;
  735. case "rotate":
  736. if ( array.length >= 1 ) {
  737. var angle = 0;
  738. var cx = 0;
  739. var cy = 0;
  740. // Angle
  741. angle = - array[ 0 ] * Math.PI / 180;
  742. if ( array.length >= 3 ) {
  743. // Center x, y
  744. cx = array[ 1 ];
  745. cy = array[ 2 ];
  746. }
  747. // Rotate around center (cx, cy)
  748. tempTransform1.identity().translate( - cx, - cy );
  749. tempTransform2.identity().rotate( angle );
  750. tempTransform3.multiplyMatrices( tempTransform2, tempTransform1 );
  751. tempTransform1.identity().translate( cx, cy );
  752. currentTransform.multiplyMatrices( tempTransform1, tempTransform3 );
  753. }
  754. break;
  755. case "scale":
  756. if ( array.length >= 1 ) {
  757. var scaleX = array[ 0 ];
  758. var scaleY = scaleX;
  759. if ( array.length >= 2 ) {
  760. scaleY = array[ 1 ];
  761. }
  762. currentTransform.scale( scaleX, scaleY );
  763. }
  764. break;
  765. case "skewX":
  766. if ( array.length === 1 ) {
  767. currentTransform.set(
  768. 1, Math.tan( array[ 0 ] * Math.PI / 180 ), 0,
  769. 0, 1, 0,
  770. 0, 0, 1
  771. );
  772. }
  773. break;
  774. case "skewY":
  775. if ( array.length === 1 ) {
  776. currentTransform.set(
  777. 1, 0, 0,
  778. Math.tan( array[ 0 ] * Math.PI / 180 ), 1, 0,
  779. 0, 0, 1
  780. );
  781. }
  782. break;
  783. case "matrix":
  784. if ( array.length === 6 ) {
  785. currentTransform.set(
  786. array[ 0 ], array[ 2 ], array[ 4 ],
  787. array[ 1 ], array[ 3 ], array[ 5 ],
  788. 0, 0, 1
  789. );
  790. }
  791. break;
  792. }
  793. }
  794. transform.premultiply( currentTransform );
  795. }
  796. return transform;
  797. }
  798. function transformPath( path, m ) {
  799. function transfVec2( v2 ) {
  800. tempV3.set( v2.x, v2.y, 1 ).applyMatrix3( m );
  801. v2.set( tempV3.x, tempV3.y );
  802. }
  803. var isRotated = isTransformRotated( m );
  804. var subPaths = path.subPaths;
  805. for ( var i = 0, n = subPaths.length; i < n; i ++ ) {
  806. var subPath = subPaths[ i ];
  807. var curves = subPath.curves;
  808. for ( var j = 0; j < curves.length; j ++ ) {
  809. var curve = curves[ j ];
  810. if ( curve.isLineCurve ) {
  811. transfVec2( curve.v1 );
  812. transfVec2( curve.v2 );
  813. } else if ( curve.isCubicBezierCurve ) {
  814. transfVec2( curve.v0 );
  815. transfVec2( curve.v1 );
  816. transfVec2( curve.v2 );
  817. transfVec2( curve.v3 );
  818. } else if ( curve.isQuadraticBezierCurve ) {
  819. transfVec2( curve.v0 );
  820. transfVec2( curve.v1 );
  821. transfVec2( curve.v2 );
  822. } else if ( curve.isEllipseCurve ) {
  823. if ( isRotated ) {
  824. console.warn( "SVGLoader: Elliptic arc or ellipse rotation or skewing is not implemented." );
  825. }
  826. tempV2.set( curve.aX, curve.aY );
  827. transfVec2( tempV2 );
  828. curve.aX = tempV2.x;
  829. curve.aY = tempV2.y;
  830. curve.xRadius *= getTransformScaleX( m );
  831. curve.yRadius *= getTransformScaleY( m );
  832. }
  833. }
  834. }
  835. }
  836. function isTransformRotated( m ) {
  837. return m.elements[ 1 ] !== 0 || m.elements[ 3 ] !== 0;
  838. }
  839. function getTransformScaleX( m ) {
  840. var te = m.elements;
  841. return Math.sqrt( te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] );
  842. }
  843. function getTransformScaleY( m ) {
  844. var te = m.elements;
  845. return Math.sqrt( te[ 3 ] * te[ 3 ] + te[ 4 ] * te[ 4 ] );
  846. }
  847. //
  848. var paths = [];
  849. var stylesheets = {};
  850. var transformStack = [];
  851. var tempTransform0 = new THREE.Matrix3();
  852. var tempTransform1 = new THREE.Matrix3();
  853. var tempTransform2 = new THREE.Matrix3();
  854. var tempTransform3 = new THREE.Matrix3();
  855. var tempV2 = new THREE.Vector2();
  856. var tempV3 = new THREE.Vector3();
  857. var currentTransform = new THREE.Matrix3();
  858. var xml = new DOMParser().parseFromString( text, 'image/svg+xml' ); // application/xml
  859. parseNode( xml.documentElement, {
  860. fill: '#000',
  861. fillOpacity: 1,
  862. strokeOpacity: 1,
  863. strokeWidth: 1,
  864. strokeLineJoin: 'miter',
  865. strokeLineCap: 'butt',
  866. strokeMiterLimit: 4
  867. } );
  868. var data = { paths: paths, xml: xml.documentElement };
  869. // console.log( paths );
  870. return data;
  871. }
  872. } );
  873. THREE.SVGLoader.getStrokeStyle = function ( width, color, lineJoin, lineCap, miterLimit ) {
  874. // Param width: Stroke width
  875. // Param color: As returned by THREE.Color.getStyle()
  876. // Param lineJoin: One of "round", "bevel", "miter" or "miter-limit"
  877. // Param lineCap: One of "round", "square" or "butt"
  878. // Param miterLimit: Maximum join length, in multiples of the "width" parameter (join is truncated if it exceeds that distance)
  879. // Returns style object
  880. width = width !== undefined ? width : 1;
  881. color = color !== undefined ? color : '#000';
  882. lineJoin = lineJoin !== undefined ? lineJoin : 'miter';
  883. lineCap = lineCap !== undefined ? lineCap : 'butt';
  884. miterLimit = miterLimit !== undefined ? miterLimit : 4;
  885. return {
  886. strokeColor: color,
  887. strokeWidth: width,
  888. strokeLineJoin: lineJoin,
  889. strokeLineCap: lineCap,
  890. strokeMiterLimit: miterLimit
  891. };
  892. };
  893. THREE.SVGLoader.pointsToStroke = function ( points, style, arcDivisions, minDistance ) {
  894. // Generates a stroke with some witdh around the given path.
  895. // The path can be open or closed (last point equals to first point)
  896. // Param points: Array of Vector2D (the path). Minimum 2 points.
  897. // Param style: Object with SVG properties as returned by SVGLoader.getStrokeStyle(), or SVGLoader.parse() in the path.userData.style object
  898. // Params arcDivisions: Arc divisions for round joins and endcaps. (Optional)
  899. // Param minDistance: Points closer to this distance will be merged. (Optional)
  900. // Returns BufferGeometry with stroke triangles (In plane z = 0). UV coordinates are generated ('u' along path. 'v' across it, from left to right)
  901. var vertices = [];
  902. var normals = [];
  903. var uvs = [];
  904. if ( THREE.SVGLoader.pointsToStrokeWithBuffers( points, style, arcDivisions, minDistance, vertices, normals, uvs ) === 0 ) {
  905. return null;
  906. }
  907. var geometry = new THREE.BufferGeometry();
  908. geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
  909. geometry.setAttribute( 'normal', new THREE.Float32BufferAttribute( normals, 3 ) );
  910. geometry.setAttribute( 'uv', new THREE.Float32BufferAttribute( uvs, 2 ) );
  911. return geometry;
  912. };
  913. THREE.SVGLoader.pointsToStrokeWithBuffers = function () {
  914. var tempV2_1 = new THREE.Vector2();
  915. var tempV2_2 = new THREE.Vector2();
  916. var tempV2_3 = new THREE.Vector2();
  917. var tempV2_4 = new THREE.Vector2();
  918. var tempV2_5 = new THREE.Vector2();
  919. var tempV2_6 = new THREE.Vector2();
  920. var tempV2_7 = new THREE.Vector2();
  921. var lastPointL = new THREE.Vector2();
  922. var lastPointR = new THREE.Vector2();
  923. var point0L = new THREE.Vector2();
  924. var point0R = new THREE.Vector2();
  925. var currentPointL = new THREE.Vector2();
  926. var currentPointR = new THREE.Vector2();
  927. var nextPointL = new THREE.Vector2();
  928. var nextPointR = new THREE.Vector2();
  929. var innerPoint = new THREE.Vector2();
  930. var outerPoint = new THREE.Vector2();
  931. return function ( points, style, arcDivisions, minDistance, vertices, normals, uvs, vertexOffset ) {
  932. // This function can be called to update existing arrays or buffers.
  933. // Accepts same parameters as pointsToStroke, plus the buffers and optional offset.
  934. // Param vertexOffset: Offset vertices to start writing in the buffers (3 elements/vertex for vertices and normals, and 2 elements/vertex for uvs)
  935. // Returns number of written vertices / normals / uvs pairs
  936. // if 'vertices' parameter is undefined no triangles will be generated, but the returned vertices count will still be valid (useful to preallocate the buffers)
  937. // 'normals' and 'uvs' buffers are optional
  938. arcDivisions = arcDivisions !== undefined ? arcDivisions : 12;
  939. minDistance = minDistance !== undefined ? minDistance : 0.001;
  940. vertexOffset = vertexOffset !== undefined ? vertexOffset : 0;
  941. // First ensure there are no duplicated points
  942. points = removeDuplicatedPoints( points );
  943. var numPoints = points.length;
  944. if ( numPoints < 2 ) return 0;
  945. var isClosed = points[ 0 ].equals( points[ numPoints - 1 ] );
  946. var currentPoint;
  947. var previousPoint = points[ 0 ];
  948. var nextPoint;
  949. var strokeWidth2 = style.strokeWidth / 2;
  950. var deltaU = 1 / ( numPoints - 1 );
  951. var u0 = 0;
  952. var innerSideModified;
  953. var joinIsOnLeftSide;
  954. var isMiter;
  955. var initialJoinIsOnLeftSide = false;
  956. var numVertices = 0;
  957. var currentCoordinate = vertexOffset * 3;
  958. var currentCoordinateUV = vertexOffset * 2;
  959. // Get initial left and right stroke points
  960. getNormal( points[ 0 ], points[ 1 ], tempV2_1 ).multiplyScalar( strokeWidth2 );
  961. lastPointL.copy( points[ 0 ] ).sub( tempV2_1 );
  962. lastPointR.copy( points[ 0 ] ).add( tempV2_1 );
  963. point0L.copy( lastPointL );
  964. point0R.copy( lastPointR );
  965. for ( var iPoint = 1; iPoint < numPoints; iPoint ++ ) {
  966. currentPoint = points[ iPoint ];
  967. // Get next point
  968. if ( iPoint === numPoints - 1 ) {
  969. if ( isClosed ) {
  970. // Skip duplicated initial point
  971. nextPoint = points[ 1 ];
  972. } else nextPoint = undefined;
  973. } else {
  974. nextPoint = points[ iPoint + 1 ];
  975. }
  976. // Normal of previous segment in tempV2_1
  977. var normal1 = tempV2_1;
  978. getNormal( previousPoint, currentPoint, normal1 );
  979. tempV2_3.copy( normal1 ).multiplyScalar( strokeWidth2 );
  980. currentPointL.copy( currentPoint ).sub( tempV2_3 );
  981. currentPointR.copy( currentPoint ).add( tempV2_3 );
  982. var u1 = u0 + deltaU;
  983. innerSideModified = false;
  984. if ( nextPoint !== undefined ) {
  985. // Normal of next segment in tempV2_2
  986. getNormal( currentPoint, nextPoint, tempV2_2 );
  987. tempV2_3.copy( tempV2_2 ).multiplyScalar( strokeWidth2 );
  988. nextPointL.copy( currentPoint ).sub( tempV2_3 );
  989. nextPointR.copy( currentPoint ).add( tempV2_3 );
  990. joinIsOnLeftSide = true;
  991. tempV2_3.subVectors( nextPoint, previousPoint );
  992. if ( normal1.dot( tempV2_3 ) < 0 ) {
  993. joinIsOnLeftSide = false;
  994. }
  995. if ( iPoint === 1 ) initialJoinIsOnLeftSide = joinIsOnLeftSide;
  996. tempV2_3.subVectors( nextPoint, currentPoint );
  997. tempV2_3.normalize();
  998. var dot = Math.abs( normal1.dot( tempV2_3 ) );
  999. // If path is straight, don't create join
  1000. if ( dot !== 0 ) {
  1001. // Compute inner and outer segment intersections
  1002. var miterSide = strokeWidth2 / dot;
  1003. tempV2_3.multiplyScalar( - miterSide );
  1004. tempV2_4.subVectors( currentPoint, previousPoint );
  1005. tempV2_5.copy( tempV2_4 ).setLength( miterSide ).add( tempV2_3 );
  1006. innerPoint.copy( tempV2_5 ).negate();
  1007. var miterLength2 = tempV2_5.length();
  1008. var segmentLengthPrev = tempV2_4.length();
  1009. tempV2_4.divideScalar( segmentLengthPrev );
  1010. tempV2_6.subVectors( nextPoint, currentPoint );
  1011. var segmentLengthNext = tempV2_6.length();
  1012. tempV2_6.divideScalar( segmentLengthNext );
  1013. // Check that previous and next segments doesn't overlap with the innerPoint of intersection
  1014. if ( tempV2_4.dot( innerPoint ) < segmentLengthPrev && tempV2_6.dot( innerPoint ) < segmentLengthNext ) {
  1015. innerSideModified = true;
  1016. }
  1017. outerPoint.copy( tempV2_5 ).add( currentPoint );
  1018. innerPoint.add( currentPoint );
  1019. isMiter = false;
  1020. if ( innerSideModified ) {
  1021. if ( joinIsOnLeftSide ) {
  1022. nextPointR.copy( innerPoint );
  1023. currentPointR.copy( innerPoint );
  1024. } else {
  1025. nextPointL.copy( innerPoint );
  1026. currentPointL.copy( innerPoint );
  1027. }
  1028. } else {
  1029. // The segment triangles are generated here if there was overlapping
  1030. makeSegmentTriangles();
  1031. }
  1032. switch ( style.strokeLineJoin ) {
  1033. case 'bevel':
  1034. makeSegmentWithBevelJoin( joinIsOnLeftSide, innerSideModified, u1 );
  1035. break;
  1036. case 'round':
  1037. // Segment triangles
  1038. createSegmentTrianglesWithMiddleSection( joinIsOnLeftSide, innerSideModified );
  1039. // Join triangles
  1040. if ( joinIsOnLeftSide ) {
  1041. makeCircularSector( currentPoint, currentPointL, nextPointL, u1, 0 );
  1042. } else {
  1043. makeCircularSector( currentPoint, nextPointR, currentPointR, u1, 1 );
  1044. }
  1045. break;
  1046. case 'miter':
  1047. case 'miter-clip':
  1048. default:
  1049. var miterFraction = ( strokeWidth2 * style.strokeMiterLimit ) / miterLength2;
  1050. if ( miterFraction < 1 ) {
  1051. // The join miter length exceeds the miter limit
  1052. if ( style.strokeLineJoin !== 'miter-clip' ) {
  1053. makeSegmentWithBevelJoin( joinIsOnLeftSide, innerSideModified, u1 );
  1054. break;
  1055. } else {
  1056. // Segment triangles
  1057. createSegmentTrianglesWithMiddleSection( joinIsOnLeftSide, innerSideModified );
  1058. // Miter-clip join triangles
  1059. if ( joinIsOnLeftSide ) {
  1060. tempV2_6.subVectors( outerPoint, currentPointL ).multiplyScalar( miterFraction ).add( currentPointL );
  1061. tempV2_7.subVectors( outerPoint, nextPointL ).multiplyScalar( miterFraction ).add( nextPointL );
  1062. addVertex( currentPointL, u1, 0 );
  1063. addVertex( tempV2_6, u1, 0 );
  1064. addVertex( currentPoint, u1, 0.5 );
  1065. addVertex( currentPoint, u1, 0.5 );
  1066. addVertex( tempV2_6, u1, 0 );
  1067. addVertex( tempV2_7, u1, 0 );
  1068. addVertex( currentPoint, u1, 0.5 );
  1069. addVertex( tempV2_7, u1, 0 );
  1070. addVertex( nextPointL, u1, 0 );
  1071. } else {
  1072. tempV2_6.subVectors( outerPoint, currentPointR ).multiplyScalar( miterFraction ).add( currentPointR );
  1073. tempV2_7.subVectors( outerPoint, nextPointR ).multiplyScalar( miterFraction ).add( nextPointR );
  1074. addVertex( currentPointR, u1, 1 );
  1075. addVertex( tempV2_6, u1, 1 );
  1076. addVertex( currentPoint, u1, 0.5 );
  1077. addVertex( currentPoint, u1, 0.5 );
  1078. addVertex( tempV2_6, u1, 1 );
  1079. addVertex( tempV2_7, u1, 1 );
  1080. addVertex( currentPoint, u1, 0.5 );
  1081. addVertex( tempV2_7, u1, 1 );
  1082. addVertex( nextPointR, u1, 1 );
  1083. }
  1084. }
  1085. } else {
  1086. // Miter join segment triangles
  1087. if ( innerSideModified ) {
  1088. // Optimized segment + join triangles
  1089. if ( joinIsOnLeftSide ) {
  1090. addVertex( lastPointR, u0, 1 );
  1091. addVertex( lastPointL, u0, 0 );
  1092. addVertex( outerPoint, u1, 0 );
  1093. addVertex( lastPointR, u0, 1 );
  1094. addVertex( outerPoint, u1, 0 );
  1095. addVertex( innerPoint, u1, 1 );
  1096. } else {
  1097. addVertex( lastPointR, u0, 1 );
  1098. addVertex( lastPointL, u0, 0 );
  1099. addVertex( outerPoint, u1, 1 );
  1100. addVertex( lastPointL, u0, 0 );
  1101. addVertex( innerPoint, u1, 0 );
  1102. addVertex( outerPoint, u1, 1 );
  1103. }
  1104. if ( joinIsOnLeftSide ) {
  1105. nextPointL.copy( outerPoint );
  1106. } else {
  1107. nextPointR.copy( outerPoint );
  1108. }
  1109. } else {
  1110. // Add extra miter join triangles
  1111. if ( joinIsOnLeftSide ) {
  1112. addVertex( currentPointL, u1, 0 );
  1113. addVertex( outerPoint, u1, 0 );
  1114. addVertex( currentPoint, u1, 0.5 );
  1115. addVertex( currentPoint, u1, 0.5 );
  1116. addVertex( outerPoint, u1, 0 );
  1117. addVertex( nextPointL, u1, 0 );
  1118. } else {
  1119. addVertex( currentPointR, u1, 1 );
  1120. addVertex( outerPoint, u1, 1 );
  1121. addVertex( currentPoint, u1, 0.5 );
  1122. addVertex( currentPoint, u1, 0.5 );
  1123. addVertex( outerPoint, u1, 1 );
  1124. addVertex( nextPointR, u1, 1 );
  1125. }
  1126. }
  1127. isMiter = true;
  1128. }
  1129. break;
  1130. }
  1131. } else {
  1132. // The segment triangles are generated here when two consecutive points are collinear
  1133. makeSegmentTriangles();
  1134. }
  1135. } else {
  1136. // The segment triangles are generated here if it is the ending segment
  1137. makeSegmentTriangles();
  1138. }
  1139. if ( ! isClosed && iPoint === numPoints - 1 ) {
  1140. // Start line endcap
  1141. addCapGeometry( points[ 0 ], point0L, point0R, joinIsOnLeftSide, true, u0 );
  1142. }
  1143. // Increment loop variables
  1144. u0 = u1;
  1145. previousPoint = currentPoint;
  1146. lastPointL.copy( nextPointL );
  1147. lastPointR.copy( nextPointR );
  1148. }
  1149. if ( ! isClosed ) {
  1150. // Ending line endcap
  1151. addCapGeometry( currentPoint, currentPointL, currentPointR, joinIsOnLeftSide, false, u1 );
  1152. } else if ( innerSideModified && vertices ) {
  1153. // Modify path first segment vertices to adjust to the segments inner and outer intersections
  1154. var lastOuter = outerPoint;
  1155. var lastInner = innerPoint;
  1156. if ( initialJoinIsOnLeftSide !== joinIsOnLeftSide ) {
  1157. lastOuter = innerPoint;
  1158. lastInner = outerPoint;
  1159. }
  1160. if ( joinIsOnLeftSide ) {
  1161. if ( isMiter || initialJoinIsOnLeftSide ) {
  1162. lastInner.toArray( vertices, 0 * 3 );
  1163. lastInner.toArray( vertices, 3 * 3 );
  1164. if ( isMiter ) {
  1165. lastOuter.toArray( vertices, 1 * 3 );
  1166. }
  1167. }
  1168. } else {
  1169. if ( isMiter || ! initialJoinIsOnLeftSide ) {
  1170. lastInner.toArray( vertices, 1 * 3 );
  1171. lastInner.toArray( vertices, 3 * 3 );
  1172. if ( isMiter ) {
  1173. lastOuter.toArray( vertices, 0 * 3 );
  1174. }
  1175. }
  1176. }
  1177. }
  1178. return numVertices;
  1179. // -- End of algorithm
  1180. // -- Functions
  1181. function getNormal( p1, p2, result ) {
  1182. result.subVectors( p2, p1 );
  1183. return result.set( - result.y, result.x ).normalize();
  1184. }
  1185. function addVertex( position, u, v ) {
  1186. if ( vertices ) {
  1187. vertices[ currentCoordinate ] = position.x;
  1188. vertices[ currentCoordinate + 1 ] = position.y;
  1189. vertices[ currentCoordinate + 2 ] = 0;
  1190. if ( normals ) {
  1191. normals[ currentCoordinate ] = 0;
  1192. normals[ currentCoordinate + 1 ] = 0;
  1193. normals[ currentCoordinate + 2 ] = 1;
  1194. }
  1195. currentCoordinate += 3;
  1196. if ( uvs ) {
  1197. uvs[ currentCoordinateUV ] = u;
  1198. uvs[ currentCoordinateUV + 1 ] = v;
  1199. currentCoordinateUV += 2;
  1200. }
  1201. }
  1202. numVertices += 3;
  1203. }
  1204. function makeCircularSector( center, p1, p2, u, v ) {
  1205. // param p1, p2: Points in the circle arc.
  1206. // p1 and p2 are in clockwise direction.
  1207. tempV2_1.copy( p1 ).sub( center ).normalize();
  1208. tempV2_2.copy( p2 ).sub( center ).normalize();
  1209. var angle = Math.PI;
  1210. var dot = tempV2_1.dot( tempV2_2 );
  1211. if ( Math.abs( dot ) < 1 ) angle = Math.abs( Math.acos( dot ) );
  1212. angle /= arcDivisions;
  1213. tempV2_3.copy( p1 );
  1214. for ( var i = 0, il = arcDivisions - 1; i < il; i ++ ) {
  1215. tempV2_4.copy( tempV2_3 ).rotateAround( center, angle );
  1216. addVertex( tempV2_3, u, v );
  1217. addVertex( tempV2_4, u, v );
  1218. addVertex( center, u, 0.5 );
  1219. tempV2_3.copy( tempV2_4 );
  1220. }
  1221. addVertex( tempV2_4, u, v );
  1222. addVertex( p2, u, v );
  1223. addVertex( center, u, 0.5 );
  1224. }
  1225. function makeSegmentTriangles() {
  1226. addVertex( lastPointR, u0, 1 );
  1227. addVertex( lastPointL, u0, 0 );
  1228. addVertex( currentPointL, u1, 0 );
  1229. addVertex( lastPointR, u0, 1 );
  1230. addVertex( currentPointL, u1, 1 );
  1231. addVertex( currentPointR, u1, 0 );
  1232. }
  1233. function makeSegmentWithBevelJoin( joinIsOnLeftSide, innerSideModified, u ) {
  1234. if ( innerSideModified ) {
  1235. // Optimized segment + bevel triangles
  1236. if ( joinIsOnLeftSide ) {
  1237. // Path segments triangles
  1238. addVertex( lastPointR, u0, 1 );
  1239. addVertex( lastPointL, u0, 0 );
  1240. addVertex( currentPointL, u1, 0 );
  1241. addVertex( lastPointR, u0, 1 );
  1242. addVertex( currentPointL, u1, 0 );
  1243. addVertex( innerPoint, u1, 1 );
  1244. // Bevel join triangle
  1245. addVertex( currentPointL, u, 0 );
  1246. addVertex( nextPointL, u, 0 );
  1247. addVertex( innerPoint, u, 0.5 );
  1248. } else {
  1249. // Path segments triangles
  1250. addVertex( lastPointR, u0, 1 );
  1251. addVertex( lastPointL, u0, 0 );
  1252. addVertex( currentPointR, u1, 1 );
  1253. addVertex( lastPointL, u0, 0 );
  1254. addVertex( innerPoint, u1, 0 );
  1255. addVertex( currentPointR, u1, 1 );
  1256. // Bevel join triangle
  1257. addVertex( currentPointR, u, 1 );
  1258. addVertex( nextPointR, u, 0 );
  1259. addVertex( innerPoint, u, 0.5 );
  1260. }
  1261. } else {
  1262. // Bevel join triangle. The segment triangles are done in the main loop
  1263. if ( joinIsOnLeftSide ) {
  1264. addVertex( currentPointL, u, 0 );
  1265. addVertex( nextPointL, u, 0 );
  1266. addVertex( currentPoint, u, 0.5 );
  1267. } else {
  1268. addVertex( currentPointR, u, 1 );
  1269. addVertex( nextPointR, u, 0 );
  1270. addVertex( currentPoint, u, 0.5 );
  1271. }
  1272. }
  1273. }
  1274. function createSegmentTrianglesWithMiddleSection( joinIsOnLeftSide, innerSideModified ) {
  1275. if ( innerSideModified ) {
  1276. if ( joinIsOnLeftSide ) {
  1277. addVertex( lastPointR, u0, 1 );
  1278. addVertex( lastPointL, u0, 0 );
  1279. addVertex( currentPointL, u1, 0 );
  1280. addVertex( lastPointR, u0, 1 );
  1281. addVertex( currentPointL, u1, 0 );
  1282. addVertex( innerPoint, u1, 1 );
  1283. addVertex( currentPointL, u0, 0 );
  1284. addVertex( currentPoint, u1, 0.5 );
  1285. addVertex( innerPoint, u1, 1 );
  1286. addVertex( currentPoint, u1, 0.5 );
  1287. addVertex( nextPointL, u0, 0 );
  1288. addVertex( innerPoint, u1, 1 );
  1289. } else {
  1290. addVertex( lastPointR, u0, 1 );
  1291. addVertex( lastPointL, u0, 0 );
  1292. addVertex( currentPointR, u1, 1 );
  1293. addVertex( lastPointL, u0, 0 );
  1294. addVertex( innerPoint, u1, 0 );
  1295. addVertex( currentPointR, u1, 1 );
  1296. addVertex( currentPointR, u0, 1 );
  1297. addVertex( innerPoint, u1, 0 );
  1298. addVertex( currentPoint, u1, 0.5 );
  1299. addVertex( currentPoint, u1, 0.5 );
  1300. addVertex( innerPoint, u1, 0 );
  1301. addVertex( nextPointR, u0, 1 );
  1302. }
  1303. }
  1304. }
  1305. function addCapGeometry( center, p1, p2, joinIsOnLeftSide, start, u ) {
  1306. // param center: End point of the path
  1307. // param p1, p2: Left and right cap points
  1308. switch ( style.strokeLineCap ) {
  1309. case 'round':
  1310. if ( start ) {
  1311. makeCircularSector( center, p2, p1, u, 0.5 );
  1312. } else {
  1313. makeCircularSector( center, p1, p2, u, 0.5 );
  1314. }
  1315. break;
  1316. case 'square':
  1317. if ( start ) {
  1318. tempV2_1.subVectors( p1, center );
  1319. tempV2_2.set( tempV2_1.y, - tempV2_1.x );
  1320. tempV2_3.addVectors( tempV2_1, tempV2_2 ).add( center );
  1321. tempV2_4.subVectors( tempV2_2, tempV2_1 ).add( center );
  1322. // Modify already existing vertices
  1323. if ( joinIsOnLeftSide ) {
  1324. tempV2_3.toArray( vertices, 1 * 3 );
  1325. tempV2_4.toArray( vertices, 0 * 3 );
  1326. tempV2_4.toArray( vertices, 3 * 3 );
  1327. } else {
  1328. tempV2_3.toArray( vertices, 1 * 3 );
  1329. tempV2_3.toArray( vertices, 3 * 3 );
  1330. tempV2_4.toArray( vertices, 0 * 3 );
  1331. }
  1332. } else {
  1333. tempV2_1.subVectors( p2, center );
  1334. tempV2_2.set( tempV2_1.y, - tempV2_1.x );
  1335. tempV2_3.addVectors( tempV2_1, tempV2_2 ).add( center );
  1336. tempV2_4.subVectors( tempV2_2, tempV2_1 ).add( center );
  1337. var vl = vertices.length;
  1338. // Modify already existing vertices
  1339. if ( joinIsOnLeftSide ) {
  1340. tempV2_3.toArray( vertices, vl - 1 * 3 );
  1341. tempV2_4.toArray( vertices, vl - 2 * 3 );
  1342. tempV2_4.toArray( vertices, vl - 4 * 3 );
  1343. } else {
  1344. tempV2_3.toArray( vertices, vl - 2 * 3 );
  1345. tempV2_4.toArray( vertices, vl - 1 * 3 );
  1346. tempV2_4.toArray( vertices, vl - 4 * 3 );
  1347. }
  1348. }
  1349. break;
  1350. case 'butt':
  1351. default:
  1352. // Nothing to do here
  1353. break;
  1354. }
  1355. }
  1356. function removeDuplicatedPoints( points ) {
  1357. // Creates a new array if necessary with duplicated points removed.
  1358. // This does not remove duplicated initial and ending points of a closed path.
  1359. var dupPoints = false;
  1360. for ( var i = 1, n = points.length - 1; i < n; i ++ ) {
  1361. if ( points[ i ].distanceTo( points[ i + 1 ] ) < minDistance ) {
  1362. dupPoints = true;
  1363. break;
  1364. }
  1365. }
  1366. if ( ! dupPoints ) return points;
  1367. var newPoints = [];
  1368. newPoints.push( points[ 0 ] );
  1369. for ( var i = 1, n = points.length - 1; i < n; i ++ ) {
  1370. if ( points[ i ].distanceTo( points[ i + 1 ] ) >= minDistance ) {
  1371. newPoints.push( points[ i ] );
  1372. }
  1373. }
  1374. newPoints.push( points[ points.length - 1 ] );
  1375. return newPoints;
  1376. }
  1377. };
  1378. }();