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/**

* @author mrdoob / http://mrdoob.com/

* @author zz85 / http://joshuakoo.com/

* @author yomboprime / https://yombo.org

THREE.SVGLoader = function ( manager ) {

this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;

};

THREE.SVGLoader.prototype = {

constructor: THREE.SVGLoader,

load: function ( url, onLoad, onProgress, onError ) {

var scope = this;

var loader = new THREE.FileLoader( scope.manager );

loader.setPath( scope.path );

loader.load( url, function ( text ) {

onLoad( scope.parse( text ) );

}, onProgress, onError );

setPath: function ( value ) {

this.path = value;

return this;

parse: function ( text ) {

function parseNode( node, style ) {

if ( node.nodeType !== 1 ) return;

var transform = getNodeTransform( node );

var transforms = getNodeTransform( node );

var i = 0;

do {

var path = null;

switch ( node.nodeName ) {

case 'svg':

break;

case 'g':

style = parseStyle( node, style );

break;

case 'path':

style = parseStyle( node, style );

if ( node.hasAttribute( 'd' ) && isVisible( style ) ) path = parsePathNode( node, style );

break;

case 'rect':

style = parseStyle( node, style );

if ( isVisible( style ) ) path = parseRectNode( node, style );

break;

case 'polygon':

style = parseStyle( node, style );

if ( isVisible( style ) ) path = parsePolygonNode( node, style );

break;

case 'polyline':

style = parseStyle( node, style );

if ( isVisible( style ) ) path = parsePolylineNode( node, style );

break;

case 'circle':

style = parseStyle( node, style );

if ( isVisible( style ) ) path = parseCircleNode( node, style );

break;

case 'ellipse':

style = parseStyle( node, style );

if ( isVisible( style ) ) path = parseEllipseNode( node, style );

break;

case 'line':

style = parseStyle( node, style );

if ( isVisible( style ) ) path = parseLineNode( node, style );

break;

default:

console.log( node );

}

if ( path ) {

transformPath( path, currentTransform );

paths.push( path );

}

var nodes = node.childNodes;

for ( var i = 0; i < nodes.length; i ++ ) {

parseNode( nodes[ i ], style );

}

if ( transform ) {

if ( transforms ) {

transform = transforms[i];

currentTransform.copy( transformStack.pop() );

}

i++;

}

while (transforms && i < transforms.length)

}

function parsePathNode( node, style ) {

var path = new THREE.ShapePath();

path.color.setStyle( style.fill );

var point = new THREE.Vector2();

var control = new THREE.Vector2();

var firstPoint = new THREE.Vector2();

var isFirstPoint = true;

已保存差异

原始文本

打开文件

/**
 * @author mrdoob / http://mrdoob.com/
 * @author zz85 / http://joshuakoo.com/
 * @author yomboprime / https://yombo.org
 */

THREE.SVGLoader = function ( manager ) {

this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;

};

THREE.SVGLoader.prototype = {

constructor: THREE.SVGLoader,

load: function ( url, onLoad, onProgress, onError ) {

var scope = this;

var loader = new THREE.FileLoader( scope.manager );
		loader.setPath( scope.path );
		loader.load( url, function ( text ) {

onLoad( scope.parse( text ) );

}, onProgress, onError );

setPath: function ( value ) {

this.path = value;
		return this;

parse: function ( text ) {

function parseNode( node, style ) {

if ( node.nodeType !== 1 ) return;

var transform = getNodeTransform( node );

var path = null;

switch ( node.nodeName ) {

case 'svg':
					break;

case 'g':
					style = parseStyle( node, style );
					break;

case 'path':
					style = parseStyle( node, style );
					if ( node.hasAttribute( 'd' ) && isVisible( style ) ) path = parsePathNode( node, style );
					break;

case 'rect':
					style = parseStyle( node, style );
					if ( isVisible( style ) ) path = parseRectNode( node, style );
					break;

case 'polygon':
					style = parseStyle( node, style );
					if ( isVisible( style ) ) path = parsePolygonNode( node, style );
					break;

case 'polyline':
					style = parseStyle( node, style );
					if ( isVisible( style ) ) path = parsePolylineNode( node, style );
					break;

case 'circle':
					style = parseStyle( node, style );
					if ( isVisible( style ) ) path = parseCircleNode( node, style );
					break;

case 'ellipse':
					style = parseStyle( node, style );
					if ( isVisible( style ) ) path = parseEllipseNode( node, style );
					break;

case 'line':
					style = parseStyle( node, style );
					if ( isVisible( style ) ) path = parseLineNode( node, style );
					break;

default:
					console.log( node );

}

if ( path ) {

transformPath( path, currentTransform );

paths.push( path );

}

var nodes = node.childNodes;

for ( var i = 0; i < nodes.length; i ++ ) {

parseNode( nodes[ i ], style );

}

if ( transform ) {

currentTransform.copy( transformStack.pop() );

}

function parsePathNode( node, style ) {

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );

var point = new THREE.Vector2();
			var control = new THREE.Vector2();

var firstPoint = new THREE.Vector2();
			var isFirstPoint = true;
			var doSetFirstPoint = false;

var d = node.getAttribute( 'd' );

// console.log( d );

var commands = d.match( /[a-df-z][^a-df-z]*/ig );

for ( var i = 0, l = commands.length; i < l; i ++ ) {

var command = commands[ i ];

var type = command.charAt( 0 );
				var data = command.substr( 1 ).trim();

if ( isFirstPoint ) {
					doSetFirstPoint = true;
				}
				isFirstPoint = false;

switch ( type ) {

case 'M':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
							point.x = numbers[ j + 0 ];
							point.y = numbers[ j + 1 ];
							control.x = point.x;
							control.y = point.y;
							if ( j === 0 ) {
								path.moveTo( point.x, point.y );
							} else {
								path.lineTo( point.x, point.y );
							}
						}
						break;

case 'H':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
							point.x = numbers[ j ];
							control.x = point.x;
							control.y = point.y;
							path.lineTo( point.x, point.y );
						}
						break;

case 'V':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
							point.y = numbers[ j ];
							control.x = point.x;
							control.y = point.y;
							path.lineTo( point.x, point.y );
						}
						break;

case 'L':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
							point.x = numbers[ j + 0 ];
							point.y = numbers[ j + 1 ];
							control.x = point.x;
							control.y = point.y;
							path.lineTo( point.x, point.y );
						}
						break;

case 'C':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 6 ) {
							path.bezierCurveTo(
								numbers[ j + 0 ],
								numbers[ j + 1 ],
								numbers[ j + 2 ],
								numbers[ j + 3 ],
								numbers[ j + 4 ],
								numbers[ j + 5 ]
							);
							control.x = numbers[ j + 2 ];
							control.y = numbers[ j + 3 ];
							point.x = numbers[ j + 4 ];
							point.y = numbers[ j + 5 ];
						}
						break;

case 'S':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
							path.bezierCurveTo(
								getReflection( point.x, control.x ),
								getReflection( point.y, control.y ),
								numbers[ j + 0 ],
								numbers[ j + 1 ],
								numbers[ j + 2 ],
								numbers[ j + 3 ]
							);
							control.x = numbers[ j + 0 ];
							control.y = numbers[ j + 1 ];
							point.x = numbers[ j + 2 ];
							point.y = numbers[ j + 3 ];
						}
						break;

case 'Q':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
							path.quadraticCurveTo(
								numbers[ j + 0 ],
								numbers[ j + 1 ],
								numbers[ j + 2 ],
								numbers[ j + 3 ]
							);
							control.x = numbers[ j + 0 ];
							control.y = numbers[ j + 1 ];
							point.x = numbers[ j + 2 ];
							point.y = numbers[ j + 3 ];
						}
						break;

case 'T':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
							var rx = getReflection( point.x, control.x );
							var ry = getReflection( point.y, control.y );
							path.quadraticCurveTo(
								rx,
								ry,
								numbers[ j + 0 ],
								numbers[ j + 1 ]
							);
							control.x = rx;
							control.y = ry;
							point.x = numbers[ j + 0 ];
							point.y = numbers[ j + 1 ];
						}
						break;

case 'A':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 7 ) {
							var start = point.clone();
							point.x = numbers[ j + 5 ];
							point.y = numbers[ j + 6 ];
							control.x = point.x;
							control.y = point.y;
							parseArcCommand(
								path, numbers[ j ], numbers[ j + 1 ], numbers[ j + 2 ], numbers[ j + 3 ], numbers[ j + 4 ], start, point
							);
						}
						break;

case 'm':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
							point.x += numbers[ j + 0 ];
							point.y += numbers[ j + 1 ];
							control.x = point.x;
							control.y = point.y;
							if ( j === 0 ) {
								path.moveTo( point.x, point.y );
							} else {
								path.lineTo( point.x, point.y );
							}
						}
						break;

case 'h':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
							point.x += numbers[ j ];
							control.x = point.x;
							control.y = point.y;
							path.lineTo( point.x, point.y );
						}
						break;

case 'v':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j ++ ) {
							point.y += numbers[ j ];
							control.x = point.x;
							control.y = point.y;
							path.lineTo( point.x, point.y );
						}
						break;

case 'l':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
							point.x += numbers[ j + 0 ];
							point.y += numbers[ j + 1 ];
							control.x = point.x;
							control.y = point.y;
							path.lineTo( point.x, point.y );
						}
						break;

case 'c':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 6 ) {
							path.bezierCurveTo(
								point.x + numbers[ j + 0 ],
								point.y + numbers[ j + 1 ],
								point.x + numbers[ j + 2 ],
								point.y + numbers[ j + 3 ],
								point.x + numbers[ j + 4 ],
								point.y + numbers[ j + 5 ]
							);
							control.x = point.x + numbers[ j + 2 ];
							control.y = point.y + numbers[ j + 3 ];
							point.x += numbers[ j + 4 ];
							point.y += numbers[ j + 5 ];
						}
						break;

case 's':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
							path.bezierCurveTo(
								getReflection( point.x, control.x ),
								getReflection( point.y, control.y ),
								point.x + numbers[ j + 0 ],
								point.y + numbers[ j + 1 ],
								point.x + numbers[ j + 2 ],
								point.y + numbers[ j + 3 ]
							);
							control.x = point.x + numbers[ j + 0 ];
							control.y = point.y + numbers[ j + 1 ];
							point.x += numbers[ j + 2 ];
							point.y += numbers[ j + 3 ];
						}
						break;

case 'q':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 4 ) {
							path.quadraticCurveTo(
								point.x + numbers[ j + 0 ],
								point.y + numbers[ j + 1 ],
								point.x + numbers[ j + 2 ],
								point.y + numbers[ j + 3 ]
							);
							control.x = point.x + numbers[ j + 0 ];
							control.y = point.y + numbers[ j + 1 ];
							point.x += numbers[ j + 2 ];
							point.y += numbers[ j + 3 ];
						}
						break;

case 't':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 2 ) {
							var rx = getReflection( point.x, control.x );
							var ry = getReflection( point.y, control.y );
							path.quadraticCurveTo(
								rx,
								ry,
								point.x + numbers[ j + 0 ],
								point.y + numbers[ j + 1 ]
							);
							control.x = rx;
							control.y = ry;
							point.x = point.x + numbers[ j + 0 ];
							point.y = point.y + numbers[ j + 1 ];
						}
						break;

case 'a':
						var numbers = parseFloats( data );
						for ( var j = 0, jl = numbers.length; j < jl; j += 7 ) {
							var start = point.clone();
							point.x += numbers[ j + 5 ];
							point.y += numbers[ j + 6 ];
							control.x = point.x;
							control.y = point.y;
							parseArcCommand(
								path, numbers[ j ], numbers[ j + 1 ], numbers[ j + 2 ], numbers[ j + 3 ], numbers[ j + 4 ], start, point
							);
						}
						break;

case 'Z':
					case 'z':
						path.currentPath.autoClose = true;
						if ( path.currentPath.curves.length > 0 ) {
							// Reset point to beginning of Path
							point.copy( firstPoint );
							path.currentPath.currentPoint.copy( point );
							isFirstPoint = true;
						}
						break;

default:
						console.warn( command );

}

// console.log( type, parseFloats( data ), parseFloats( data ).length  )

if ( doSetFirstPoint ) {

firstPoint.copy( point );

doSetFirstPoint = false;

}
			}

return path;

}

/**
		 * https://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
		 * https://mortoray.com/2017/02/16/rendering-an-svg-elliptical-arc-as-bezier-curves/ Appendix: Endpoint to center arc conversion
		 * From
		 * rx ry x-axis-rotation large-arc-flag sweep-flag x y
		 * To
		 * aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation
		 */

function parseArcCommand( path, rx, ry, x_axis_rotation, large_arc_flag, sweep_flag, start, end ) {

x_axis_rotation = x_axis_rotation * Math.PI / 180;

// Ensure radii are positive
			rx = Math.abs( rx );
			ry = Math.abs( ry );

// Compute (x1′, y1′)
			var dx2 = ( start.x - end.x ) / 2.0;
			var dy2 = ( start.y - end.y ) / 2.0;
			var x1p = Math.cos( x_axis_rotation ) * dx2 + Math.sin( x_axis_rotation ) * dy2;
			var y1p = - Math.sin( x_axis_rotation ) * dx2 + Math.cos( x_axis_rotation ) * dy2;

// Compute (cx′, cy′)
			var rxs = rx * rx;
			var rys = ry * ry;
			var x1ps = x1p * x1p;
			var y1ps = y1p * y1p;

// Ensure radii are large enough
			var cr = x1ps / rxs + y1ps / rys;

if ( cr > 1 ) {

// scale up rx,ry equally so cr == 1
				var s = Math.sqrt( cr );
				rx = s * rx;
				ry = s * ry;
				rxs = rx * rx;
				rys = ry * ry;

}

var dq = ( rxs * y1ps + rys * x1ps );
			var pq = ( rxs * rys - dq ) / dq;
			var q = Math.sqrt( Math.max( 0, pq ) );
			if ( large_arc_flag === sweep_flag ) q = - q;
			var cxp = q * rx * y1p / ry;
			var cyp = - q * ry * x1p / rx;

// Step 3: Compute (cx, cy) from (cx′, cy′)
			var cx = Math.cos( x_axis_rotation ) * cxp - Math.sin( x_axis_rotation ) * cyp + ( start.x + end.x ) / 2;
			var cy = Math.sin( x_axis_rotation ) * cxp + Math.cos( x_axis_rotation ) * cyp + ( start.y + end.y ) / 2;

// Step 4: Compute θ1 and Δθ
			var theta = svgAngle( 1, 0, ( x1p - cxp ) / rx, ( y1p - cyp ) / ry );
			var delta = svgAngle( ( x1p - cxp ) / rx, ( y1p - cyp ) / ry, ( - x1p - cxp ) / rx, ( - y1p - cyp ) / ry ) % ( Math.PI * 2 );

path.currentPath.absellipse( cx, cy, rx, ry, theta, theta + delta, sweep_flag === 0, x_axis_rotation );

}

function svgAngle( ux, uy, vx, vy ) {

var dot = ux * vx + uy * vy;
			var len = Math.sqrt( ux * ux + uy * uy ) *  Math.sqrt( vx * vx + vy * vy );
			var ang = Math.acos( Math.max( -1, Math.min( 1, dot / len ) ) ); // floating point precision, slightly over values appear
			if ( ( ux * vy - uy * vx ) < 0 ) ang = - ang;
			return ang;

}

/*
		* According to https://www.w3.org/TR/SVG/shapes.html#RectElementRXAttribute
		* rounded corner should be rendered to elliptical arc, but bezier curve does the job well enough
		*/
		function parseRectNode( node, style ) {

var x = parseFloat( node.getAttribute( 'x' ) || 0 );
			var y = parseFloat( node.getAttribute( 'y' ) || 0 );
			var rx = parseFloat( node.getAttribute( 'rx' ) || 0 );
			var ry = parseFloat( node.getAttribute( 'ry' ) || 0 );
			var w = parseFloat( node.getAttribute( 'width' ) );
			var h = parseFloat( node.getAttribute( 'height' ) );

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );
			path.moveTo( x + 2 * rx, y );
			path.lineTo( x + w - 2 * rx, y );
			if ( rx !== 0 || ry !== 0 ) path.bezierCurveTo( x + w, y, x + w, y, x + w, y + 2 * ry );
			path.lineTo( x + w, y + h - 2 * ry );
			if ( rx !== 0 || ry !== 0 ) path.bezierCurveTo( x + w, y + h, x + w, y + h, x + w - 2 * rx, y + h );
			path.lineTo( x + 2 * rx, y + h );

if ( rx !== 0 || ry !== 0 ) {

path.bezierCurveTo( x, y + h, x, y + h, x, y + h - 2 * ry );

}

path.lineTo( x, y + 2 * ry );

if ( rx !== 0 || ry !== 0 ) {

path.bezierCurveTo( x, y, x, y, x + 2 * rx, y );

}

return path;

}

function parsePolygonNode( node, style ) {

function iterator( match, a, b ) {

var x = parseFloat( a );
				var y = parseFloat( b );

if ( index === 0 ) {
					path.moveTo( x, y );
				} else {
					path.lineTo( x, y );
				}

index ++;

}

var regex = /(-?[\d\.?]+)[,|\s](-?[\d\.?]+)/g;

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );

var index = 0;

node.getAttribute( 'points' ).replace(regex, iterator);

path.currentPath.autoClose = true;

return path;

}

function parsePolylineNode( node, style ) {

function iterator( match, a, b ) {

var x = parseFloat( a );
				var y = parseFloat( b );

if ( index === 0 ) {
					path.moveTo( x, y );
				} else {
					path.lineTo( x, y );
				}

index ++;

}

var regex = /(-?[\d\.?]+)[,|\s](-?[\d\.?]+)/g;

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );

var index = 0;

node.getAttribute( 'points' ).replace(regex, iterator);

path.currentPath.autoClose = false;

return path;

}

function parseCircleNode( node, style ) {

var x = parseFloat( node.getAttribute( 'cx' ) );
			var y = parseFloat( node.getAttribute( 'cy' ) );
			var r = parseFloat( node.getAttribute( 'r' ) );

var subpath = new THREE.Path();
			subpath.absarc( x, y, r, 0, Math.PI * 2 );

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );
			path.subPaths.push( subpath );

return path;

}

function parseEllipseNode( node, style ) {

var x = parseFloat( node.getAttribute( 'cx' ) );
			var y = parseFloat( node.getAttribute( 'cy' ) );
			var rx = parseFloat( node.getAttribute( 'rx' ) );
			var ry = parseFloat( node.getAttribute( 'ry' ) );

var subpath = new THREE.Path();
			subpath.absellipse( x, y, rx, ry, 0, Math.PI * 2 );

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );
			path.subPaths.push( subpath );

return path;

}

function parseLineNode( node, style ) {

var x1 = parseFloat( node.getAttribute( 'x1' ) );
			var y1 = parseFloat( node.getAttribute( 'y1' ) );
			var x2 = parseFloat( node.getAttribute( 'x2' ) );
			var y2 = parseFloat( node.getAttribute( 'y2' ) );

var path = new THREE.ShapePath();
			path.moveTo( x1, y1 );
			path.lineTo( x2, y2 );
			path.currentPath.autoClose = false;

return path;

}

function parseStyle( node, style ) {

style = Object.assign( {}, style ); // clone style

if ( node.hasAttribute( 'fill' ) ) style.fill = node.getAttribute( 'fill' );
			if ( node.style.fill !== '' ) style.fill = node.style.fill;

return style;

}

function isVisible( style ) {

return style.fill !== 'none' && style.fill !== 'transparent';

}

// http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes

function getReflection( a, b ) {

return a - ( b - a );

}

function parseFloats( string ) {

var array = string.split( /[\s,]+|(?=\s?[+\-])/ );

for ( var i = 0; i < array.length; i ++ ) {

var number = array[ i ];

// Handle values like 48.6037.7.8
				// TODO Find a regex for this

if ( number.indexOf( '.' ) !== number.lastIndexOf( '.' ) ) {

var split = number.split( '.' );

for ( var s = 2; s < split.length; s ++ ) {

array.splice( i + s - 1, 0, '0.' + split[ s ] );

}

array[ i ] = parseFloat( number );

}

return array;

}

function getNodeTransform( node ) {

if ( ! node.hasAttribute( 'transform' ) ) {
				return null;
			}

var transform = parseTransformNode( node );

if ( transform ) {

if ( transformStack.length > 0 ) {
					transform.premultiply( transformStack[ transformStack.length - 1 ] );
				}

currentTransform.copy( transform );
				transformStack.push( transform );

}

return transform;

}

function parseTransformNode( node ) {

var transformAttr = node.getAttribute( 'transform' );
			var transform = null;
			var openParPos = transformAttr.indexOf( "(" );
			var closeParPos = transformAttr.indexOf( ")" );

if ( openParPos > 0 && openParPos < closeParPos ) {

var transformType = transformAttr.substr( 0, openParPos );

var array = parseFloats( transformAttr.substr( openParPos + 1, closeParPos - openParPos - 1 ) );

switch ( transformType ) {

case "translate":

if ( array.length >= 1 ) {

transform = new THREE.Matrix3();

var tx = array[ 0 ];
							var ty = tx;

if ( array.length >= 2 ) {

ty = array[ 1 ];

}

transform.translate( tx, ty );

}

break;

case "rotate":

if ( array.length >= 1 ) {

var angle = 0;
							var cx = 0;
							var cy = 0;

transform = new THREE.Matrix3();

// Angle
							angle = - array[ 0 ] * Math.PI / 180;

if ( array.length >= 3 ) {

// Center x, y
								cx = array[ 1 ];
								cy = array[ 2 ];

}

// Rotate around center (cx, cy)
							tempTransform1.identity().translate( -cx, -cy );
							tempTransform2.identity().rotate( angle );
							tempTransform3.multiplyMatrices( tempTransform2, tempTransform1 );
							tempTransform1.identity().translate( cx, cy );
							transform.multiplyMatrices( tempTransform1, tempTransform3 );

}

break;

case "scale":

if ( array.length >= 1 ) {

transform = new THREE.Matrix3();

var scaleX = array[ 0 ];
							var scaleY = scaleX;

if ( array.length >= 2 ) {
								scaleY = array[ 1 ];
							}

transform.scale( scaleX, scaleY );

}

break;

case "skewX":

if ( array.length === 1 ) {

transform = new THREE.Matrix3();

transform.set(
								1, Math.tan( array[ 0 ] * Math.PI / 180 ), 0,
								0, 1, 0,
								0, 0, 1
							);

}

break;

case "skewY":

if ( array.length === 1 ) {

transform = new THREE.Matrix3();

transform.set(
								1, 0, 0,
								Math.tan( array[ 0 ] * Math.PI / 180 ), 1, 0,
								0, 0, 1
							);

}

break;

case "matrix":

if ( array.length === 6 ) {

transform = new THREE.Matrix3();

transform.set(
								array[ 0 ], array[ 2 ], array[ 4 ],
								array[ 1 ], array[ 3 ], array[ 5 ],
								0, 0, 1
							);

}

break;
				}

}

return transform;

}

function transformPath( path, m ) {

function transfVec2( v2 ) {

tempV3.set( v2.x, v2.y, 1 ).applyMatrix3( m );

v2.set( tempV3.x, tempV3.y );

}

var isRotated = isTransformRotated( m );

var tempV2 = new THREE.Vector2();
			var tempV3 = new THREE.Vector3();

var subPaths = path.subPaths;

for ( var i = 0, n = subPaths.length; i < n; i++ ) {

var subPath = subPaths[ i ];
				var curves = subPath.curves;

for ( var j = 0; j < curves.length; j++ ) {

var curve = curves[ j ];

if ( curve.isLineCurve ) {

transfVec2( curve.v1 );
						transfVec2( curve.v2 );

} else if ( curve.isCubicBezierCurve ) {

transfVec2( curve.v0 );
						transfVec2( curve.v1 );
						transfVec2( curve.v2 );
						transfVec2( curve.v3 );

} else if ( curve.isQuadraticBezierCurve ) {

transfVec2( curve.v0 );
						transfVec2( curve.v1 );
						transfVec2( curve.v2 );

} else if ( curve.isEllipseCurve ) {

if ( isRotated ) {
							console.warn( "SVGLoader: Elliptic arc or ellipse rotation or skewing is not implemented." );
						}

tempV2.set( curve.aX, curve.aY );
						transfVec2( tempV2 );
						curve.aX = tempV2.x;
						curve.aY = tempV2.y;

curve.xRadius *= getTransformScaleX( m );
						curve.yRadius *= getTransformScaleY( m );

}

function isTransformRotated( m ) {
			return m.elements[ 1 ] !== 0 || m.elements[ 3 ] !== 0;
		}

function getTransformScaleX( m ) {
			var te = m.elements;
			return Math.sqrt( te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] )
		}

function getTransformScaleY( m ) {
			var te = m.elements;
			return Math.sqrt( te[ 3 ] * te[ 3 ] + te[ 4 ] * te[ 4 ] )
		}

console.log( 'THREE.SVGLoader' );

var paths = [];

var transformStack = [];

var tempTransform1 = new THREE.Matrix3();
		var tempTransform2 = new THREE.Matrix3();
		var tempTransform3 = new THREE.Matrix3();

var currentTransform = new THREE.Matrix3();

console.time( 'THREE.SVGLoader: DOMParser' );

var xml = new DOMParser().parseFromString( text, 'image/svg+xml' ); // application/xml

console.timeEnd( 'THREE.SVGLoader: DOMParser' );

console.time( 'THREE.SVGLoader: Parse' );

parseNode( xml.documentElement, { fill: '#000' } );

// console.log( paths );

console.timeEnd( 'THREE.SVGLoader: Parse' );

return paths;

}

};

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打开文件

/**
 * @author mrdoob / http://mrdoob.com/
 * @author zz85 / http://joshuakoo.com/
 * @author yomboprime / https://yombo.org
 */

THREE.SVGLoader = function ( manager ) {

this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;

};

THREE.SVGLoader.prototype = {

constructor: THREE.SVGLoader,

load: function ( url, onLoad, onProgress, onError ) {

var scope = this;

var loader = new THREE.FileLoader( scope.manager );
		loader.setPath( scope.path );
		loader.load( url, function ( text ) {

onLoad( scope.parse( text ) );

}, onProgress, onError );

setPath: function ( value ) {

this.path = value;
		return this;

parse: function ( text ) {

function parseNode( node, style ) {

if ( node.nodeType !== 1 ) return;

var transforms = getNodeTransform( node );
			var i = 0;
			do {
				var path = null;

switch ( node.nodeName ) {

case 'svg':
						break;

case 'g':
						style = parseStyle( node, style );
						break;

case 'path':
						style = parseStyle( node, style );
						if ( node.hasAttribute( 'd' ) && isVisible( style ) ) path = parsePathNode( node, style );
						break;

case 'rect':
						style = parseStyle( node, style );
						if ( isVisible( style ) ) path = parseRectNode( node, style );
						break;

case 'polygon':
						style = parseStyle( node, style );
						if ( isVisible( style ) ) path = parsePolygonNode( node, style );
						break;

case 'polyline':
						style = parseStyle( node, style );
						if ( isVisible( style ) ) path = parsePolylineNode( node, style );
						break;

case 'circle':
						style = parseStyle( node, style );
						if ( isVisible( style ) ) path = parseCircleNode( node, style );
						break;

case 'ellipse':
						style = parseStyle( node, style );
						if ( isVisible( style ) ) path = parseEllipseNode( node, style );
						break;

case 'line':
						style = parseStyle( node, style );
						if ( isVisible( style ) ) path = parseLineNode( node, style );
						break;

default:
						console.log( node );

}

if ( path ) {

transformPath( path, currentTransform );

paths.push( path );

}

var nodes = node.childNodes;

for ( var i = 0; i < nodes.length; i ++ ) {

parseNode( nodes[ i ], style );

}

if ( transforms ) {
					transform = transforms[i];	
					currentTransform.copy( transformStack.pop() );
				}
				i++;
			}
			while (transforms && i < transforms.length)
		}

function parsePathNode( node, style ) {

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );

var point = new THREE.Vector2();
			var control = new THREE.Vector2();

var firstPoint = new THREE.Vector2();
			var isFirstPoint = true;
			var doSetFirstPoint = false;

var d = node.getAttribute( 'd' );

// console.log( d );

var commands = d.match( /[a-df-z][^a-df-z]*/ig );

for ( var i = 0, l = commands.length; i < l; i ++ ) {

var command = commands[ i ];

var type = command.charAt( 0 );
				var data = command.substr( 1 ).trim();

if ( isFirstPoint ) {
					doSetFirstPoint = true;
				}
				isFirstPoint = false;

switch ( type ) {

default:
						console.warn( command );

}

// console.log( type, parseFloats( data ), parseFloats( data ).length  )

if ( doSetFirstPoint ) {

firstPoint.copy( point );

doSetFirstPoint = false;

}
			}

return path;

}

function parseArcCommand( path, rx, ry, x_axis_rotation, large_arc_flag, sweep_flag, start, end ) {

x_axis_rotation = x_axis_rotation * Math.PI / 180;

// Ensure radii are positive
			rx = Math.abs( rx );
			ry = Math.abs( ry );

// Compute (cx′, cy′)
			var rxs = rx * rx;
			var rys = ry * ry;
			var x1ps = x1p * x1p;
			var y1ps = y1p * y1p;

// Ensure radii are large enough
			var cr = x1ps / rxs + y1ps / rys;

if ( cr > 1 ) {

// scale up rx,ry equally so cr == 1
				var s = Math.sqrt( cr );
				rx = s * rx;
				ry = s * ry;
				rxs = rx * rx;
				rys = ry * ry;

}

path.currentPath.absellipse( cx, cy, rx, ry, theta, theta + delta, sweep_flag === 0, x_axis_rotation );

}

function svgAngle( ux, uy, vx, vy ) {

}

if ( rx !== 0 || ry !== 0 ) {

path.bezierCurveTo( x, y + h, x, y + h, x, y + h - 2 * ry );

}

path.lineTo( x, y + 2 * ry );

if ( rx !== 0 || ry !== 0 ) {

path.bezierCurveTo( x, y, x, y, x + 2 * rx, y );

}

return path;

}

function parsePolygonNode( node, style ) {

function iterator( match, a, b ) {

var x = parseFloat( a );
				var y = parseFloat( b );

if ( index === 0 ) {
					path.moveTo( x, y );
				} else {
					path.lineTo( x, y );
				}

index ++;

}

var regex = /(-?[\d\.?]+)[,|\s](-?[\d\.?]+)/g;

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );

var index = 0;

node.getAttribute( 'points' ).replace(regex, iterator);

path.currentPath.autoClose = true;

return path;

}

function parsePolylineNode( node, style ) {

function iterator( match, a, b ) {

var x = parseFloat( a );
				var y = parseFloat( b );

if ( index === 0 ) {
					path.moveTo( x, y );
				} else {
					path.lineTo( x, y );
				}

index ++;

}

var regex = /(-?[\d\.?]+)[,|\s](-?[\d\.?]+)/g;

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );

var index = 0;

node.getAttribute( 'points' ).replace(regex, iterator);

path.currentPath.autoClose = false;

return path;

}

function parseCircleNode( node, style ) {

var x = parseFloat( node.getAttribute( 'cx' ) );
			var y = parseFloat( node.getAttribute( 'cy' ) );
			var r = parseFloat( node.getAttribute( 'r' ) );

var subpath = new THREE.Path();
			subpath.absarc( x, y, r, 0, Math.PI * 2 );

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );
			path.subPaths.push( subpath );

return path;

}

function parseEllipseNode( node, style ) {

var subpath = new THREE.Path();
			subpath.absellipse( x, y, rx, ry, 0, Math.PI * 2 );

var path = new THREE.ShapePath();
			path.color.setStyle( style.fill );
			path.subPaths.push( subpath );

return path;

}

function parseLineNode( node, style ) {

var path = new THREE.ShapePath();
			path.moveTo( x1, y1 );
			path.lineTo( x2, y2 );
			path.currentPath.autoClose = false;

return path;

}

function parseStyle( node, style ) {

style = Object.assign( {}, style ); // clone style

if ( node.hasAttribute( 'fill' ) ) style.fill = node.getAttribute( 'fill' );
			if ( node.style.fill !== '' ) style.fill = node.style.fill;

return style;

}

function isVisible( style ) {

return style.fill !== 'none' && style.fill !== 'transparent';

}

// http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes

function getReflection( a, b ) {

return a - ( b - a );

}

function parseFloats( string ) {

var array = string.split( /[\s,]+|(?=\s?[+\-])/ );

for ( var i = 0; i < array.length; i ++ ) {

var number = array[ i ];

// Handle values like 48.6037.7.8
				// TODO Find a regex for this

if ( number.indexOf( '.' ) !== number.lastIndexOf( '.' ) ) {

var split = number.split( '.' );

for ( var s = 2; s < split.length; s ++ ) {

array.splice( i + s - 1, 0, '0.' + split[ s ] );

}

array[ i ] = parseFloat( number );

}

return array;

}

function getNodeTransform( node ) {

if ( ! node.hasAttribute( 'transform' ) ) {
				return null;
			}

var transforms = parseTransformNode( node );

if ( transforms ) {
				for (i = 0; i < transforms.length; i++) {
					transform = transforms[i];
					if ( transformStack.length > 0 ) {
						transform.premultiply( transformStack[ transformStack.length - 1 ] );
					}

currentTransform.copy( transform );
					transformStack.push( transform );
				}
			}

return transforms;

}

function parseTransformNode( node ) {

var transformAttr = node.getAttribute( 'transform' );			
			var SearchPos = 0;
			var openParPos = transformAttr.indexOf( "(" , SearchPos);
			var closeParPos = transformAttr.indexOf( ")" );

var transforms = [];
			while ( openParPos > 0 && openParPos < closeParPos ) {
				var transform = null;
				var transformType = transformAttr.substr(SearchPos, openParPos-SearchPos).trim();

var array = parseFloats( transformAttr.substr( openParPos + 1, closeParPos - openParPos - 1 ) );

switch ( transformType ) {

case "translate":

if ( array.length >= 1 ) {

transform = new THREE.Matrix3();

var tx = array[ 0 ];
							var ty = tx;

if ( array.length >= 2 ) {

ty = array[ 1 ];

}

transform.translate( tx, ty );

}

break;

case "rotate":

if ( array.length >= 1 ) {

var angle = 0;
							var cx = 0;
							var cy = 0;

transform = new THREE.Matrix3();

// Angle
							angle = - array[ 0 ] * Math.PI / 180;

if ( array.length >= 3 ) {

// Center x, y
								cx = array[ 1 ];
								cy = array[ 2 ];

}

break;

case "scale":

if ( array.length >= 1 ) {

transform = new THREE.Matrix3();

var scaleX = array[ 0 ];
							var scaleY = scaleX;

if ( array.length >= 2 ) {
								scaleY = array[ 1 ];
							}

transform.scale( scaleX, scaleY );

}

break;

case "skewX":

if ( array.length === 1 ) {

transform = new THREE.Matrix3();

transform.set(
								1, Math.tan( array[ 0 ] * Math.PI / 180 ), 0,
								0, 1, 0,
								0, 0, 1
							);

}

break;

case "skewY":

if ( array.length === 1 ) {

transform = new THREE.Matrix3();

transform.set(
								1, 0, 0,
								Math.tan( array[ 0 ] * Math.PI / 180 ), 1, 0,
								0, 0, 1
							);

}

break;

case "matrix":

if ( array.length === 6 ) {

transform = new THREE.Matrix3();

transform.set(
								array[ 0 ], array[ 2 ], array[ 4 ],
								array[ 1 ], array[ 3 ], array[ 5 ],
								0, 0, 1
							);

}

break;
				}
				if (transform)
					transforms.push(transform);
				var SearchPos = closeParPos + 1;
				var openParPos = transformAttr.indexOf( "(" , SearchPos);
				var closeParPos = transformAttr.indexOf( ")", SearchPos);		
			}

return transforms;

}

function transformPath( path, m ) {

function transfVec2( v2 ) {

tempV3.set( v2.x, v2.y, 1 ).applyMatrix3( m );

v2.set( tempV3.x, tempV3.y );

}

var isRotated = isTransformRotated( m );

var tempV2 = new THREE.Vector2();
			var tempV3 = new THREE.Vector3();

var subPaths = path.subPaths;

for ( var i = 0, n = subPaths.length; i < n; i++ ) {

var subPath = subPaths[ i ];
				var curves = subPath.curves;

for ( var j = 0; j < curves.length; j++ ) {

var curve = curves[ j ];

if ( curve.isLineCurve ) {

transfVec2( curve.v1 );
						transfVec2( curve.v2 );

} else if ( curve.isCubicBezierCurve ) {

transfVec2( curve.v0 );
						transfVec2( curve.v1 );
						transfVec2( curve.v2 );
						transfVec2( curve.v3 );

} else if ( curve.isQuadraticBezierCurve ) {

transfVec2( curve.v0 );
						transfVec2( curve.v1 );
						transfVec2( curve.v2 );

} else if ( curve.isEllipseCurve ) {

if ( isRotated ) {
							console.warn( "SVGLoader: Elliptic arc or ellipse rotation or skewing is not implemented." );
						}

tempV2.set( curve.aX, curve.aY );
						transfVec2( tempV2 );
						curve.aX = tempV2.x;
						curve.aY = tempV2.y;

curve.xRadius *= getTransformScaleX( m );
						curve.yRadius *= getTransformScaleY( m );

}

function isTransformRotated( m ) {
			return m.elements[ 1 ] !== 0 || m.elements[ 3 ] !== 0;
		}

function getTransformScaleX( m ) {
			var te = m.elements;
			return Math.sqrt( te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] )
		}

function getTransformScaleY( m ) {
			var te = m.elements;
			return Math.sqrt( te[ 3 ] * te[ 3 ] + te[ 4 ] * te[ 4 ] )
		}

console.log( 'THREE.SVGLoader' );

var paths = [];

var transformStack = [];

var tempTransform1 = new THREE.Matrix3();
		var tempTransform2 = new THREE.Matrix3();
		var tempTransform3 = new THREE.Matrix3();

var currentTransform = new THREE.Matrix3();

console.time( 'THREE.SVGLoader: DOMParser' );

var xml = new DOMParser().parseFromString( text, 'image/svg+xml' ); // application/xml

console.timeEnd( 'THREE.SVGLoader: DOMParser' );

console.time( 'THREE.SVGLoader: Parse' );

parseNode( xml.documentElement, { fill: '#000' } );

// console.log( paths );

console.timeEnd( 'THREE.SVGLoader: Parse' );

return paths;

}

};