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wolfspider/SVGParse.swift

Created September 30, 2017 21:39
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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xmlns="http://www.w3.org/2000/svg"
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stroke-width="5.0"
stroke-opacity="1.0"
stroke-linejoin="round"
stroke-linecap="butt"
stroke="rgb(0,0,0)"
fill="none"
d=" M 735.537,200.684 738.279,203.425 739.443,204.586 739.459,204.603 739.647,204.790 743.932,200.428 743.915,200.412 742.750,199.251 740.002,196.517 738.594,203.130 739.763,204.288 739.779,204.304 739.968,204.491 " />
</g>
</g>
</svg>
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jessetext.svg
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SVGParse.swift
//: Playground - noun: a place where people can play
import SpriteKit
import PlaygroundSupport
import Foundation
let fileURL = Bundle.main.url(forResource: "blurplain", withExtension: "svg")
let content = try String(contentsOf: fileURL!, encoding: String.Encoding.utf8)
let frame = CGRect(x: 0, y: 0, width: 1024, height: 768)
//Set up the view and show the scene
let view = SKView(frame: frame)
var scene = SKScene(size: frame.size)
scene.scaleMode = SKSceneScaleMode.aspectFit
let midPoint = CGPoint(x: frame.width / 6 , y: frame.height )
var path = CGMutablePath()
var compositePath = CGMutablePath()
var pathPointX:Float = 0.0
var pathPointY:Float = 0.0
var qpathPointCX:Float = 0.0
var qpathPointCY:Float = 0.0
var qpathPointX:Float = 0.0
var qpathPointY:Float = 0.0
var cpoint = CGPoint()
var mpoint = CGPoint()
var qswitch:Bool = false
var qswitch2:Bool = false
var qswitch3:Bool = false
class ParserBase : NSObject, XMLParserDelegate {
var currentElement:String = ""
var foundCharacters = ""
weak var parent:ParserBase? = nil
func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
currentElement = elementName
}
func parser(_ parser: XMLParser, foundCharacters string: String) {
self.foundCharacters += string
}
}
class SVG : ParserBase {
var id = ""
var groups = [Group]()
override func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
print("processing <\(elementName)> tag from SVG")
if elementName == "svg" {
if let id = String?(attributeDict["id"]!) {
self.id = id
print(id)
}
}
if elementName == "g" {
let group = Group()
self.groups.append(group)
parser.delegate = group
group.parent = self
}
}
}
class Group : ParserBase {
var path = ""
override func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
print("processing <\(elementName)> tag from Group")
if elementName == "path" {
if let d = String?(attributeDict["d"]!) {
self.path.append(d)
}
parser.delegate = self
}
foundCharacters = ""
}
}
let xmlData = content.data(using: String.Encoding.utf8)
let parser = XMLParser(data: xmlData!)
let svg = SVG()
parser.delegate = svg
parser.parse()
var commandBuffer:String = ""
var commandWindow:Bool = false
func closePath()
{
path.addPath(compositePath)
compositePath = CGMutablePath()
commandWindow = false
//print("path closed")
}
func moveTo (_ point: String)
{
//let pathShape = shapeArray[0]
let coords = point.characters.split(separator: ",")
if(commandWindow == false)
{
pathPointX += (String(coords[0]) as NSString).floatValue
pathPointY += (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(pathPointX)
mpoint.y = CGFloat(pathPointY)
compositePath.move(to: mpoint)
//print("Move To:")
//print(mpoint)
//print(pathPointX,pathPointY)
commandWindow = true
}
else
{
pathPointX += (String(coords[0]) as NSString).floatValue
pathPointY += (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(pathPointX)
mpoint.y = CGFloat(pathPointY)
compositePath.addLine(to: mpoint)
//print(mpoint)
//print("Move To Draw Line:")
//print(pathPointX,pathPointY)
}
}
func moveToAbsolute (_ point: String)
{
//let pathShape = shapeArray[0]
let coords = point.characters.split(separator: ",")
if(commandWindow == false)
{
pathPointX = (String(coords[0]) as NSString).floatValue
pathPointY = (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(pathPointX)
mpoint.y = CGFloat(pathPointY)
compositePath.move(to: mpoint)
//print("Move To Absolute:")
//print(mpoint)
//print(pathPointX,pathPointY)
commandWindow = true
}
else
{
pathPointX = (String(coords[0]) as NSString).floatValue
pathPointY = (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(pathPointX)
mpoint.y = CGFloat(pathPointY)
compositePath.addLine(to: mpoint)
//print(mpoint)
//print("Move To Draw Line:")
//print(pathPointX,pathPointY)
}
}
func quadCurve (_ point: String)
{
//these things come in 3s
let coords = point.characters.split(separator: ",")
if(qswitch == false && qswitch2 == false && qswitch3 == false){
qpathPointCX = pathPointX
qpathPointCY = pathPointY
qpathPointCX += (String(coords[0]) as NSString).floatValue
qpathPointCY += (String(coords[1]) as NSString).floatValue
qswitch = true
return
}
if(qswitch2 == false && qswitch == true && qswitch3 == false){
qpathPointX = pathPointX
qpathPointY = pathPointY
qpathPointX += (String(coords[0]) as NSString).floatValue
qpathPointY += (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(qpathPointX)
mpoint.y = CGFloat(qpathPointY)
cpoint.x = CGFloat(qpathPointCX)
cpoint.y = CGFloat(qpathPointCY)
//print("quadcurve:")
//print(pathPointX,pathPointY,qpathPointCX,qpathPointCY,qpathPointX,qpathPointY)
compositePath.addQuadCurve(to: mpoint, control: cpoint)
qswitch2 = true
return
}
if(qswitch == true && qswitch2 == true && qswitch3 == false){
qpathPointCX = qpathPointX + (String(coords[0]) as NSString).floatValue
qpathPointCY = qpathPointY + (String(coords[1]) as NSString).floatValue
qswitch3 = true
return
}
if(qswitch == true && qswitch2 == true && qswitch3 == true){
qpathPointX = qpathPointX + (String(coords[0]) as NSString).floatValue
qpathPointY = qpathPointY + (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(qpathPointX)
mpoint.y = CGFloat(qpathPointY)
cpoint.x = CGFloat(qpathPointCX)
cpoint.y = CGFloat(qpathPointCY)
compositePath.addQuadCurve(to: mpoint, control: cpoint)
qswitch3 = false
pathPointX = qpathPointX
pathPointY = qpathPointY
return
}
}
func drawLine (_ point: String)
{
let coords = point.characters.split(separator: ",")
pathPointX += (String(coords[0]) as NSString).floatValue
pathPointY += (String(coords[1]) as NSString).floatValue
mpoint.x = CGFloat(pathPointX)
mpoint.y = CGFloat(pathPointY)
compositePath.addLine(to: mpoint)
commandWindow = false
qswitch = false
qswitch2 = false
qswitch3 = false
}
func getDescription (_ descriptorValue: String.CharacterView)
{
//print(String(descriptorValue))
let command = String(descriptorValue)
let commandList = ["c","C","h","H","l","L","m","M","q","Q","s","S","t","T","z","Z"]
if(commandBuffer != "" && !commandList.contains(command))
{
//print("Command Buffer is "+commandBuffer)
switch commandBuffer {
case "MoveTo":moveTo(command)
case "MoveToAbsolute":moveToAbsolute(command)
case "QuadCurve":quadCurve(command)
case "DrawLine":drawLine(command)
default: break
}
}
switch command {
case "c": break
case "C": break
case "h": break
case "H": break
case "l": commandBuffer = "DrawLine"
case "L": break
case "m": commandBuffer = "MoveTo"
case "M": commandBuffer = "MoveToAbsolute"
closePath()
case "q": commandBuffer = "QuadCurve"
case "Q": break
case "s": break
case "S": break
case "t": break
case "T": break
case "z": closePath()
case "Z": break
default: break
}
}
for group in svg.groups {
//This should have a some way to describe yes we have a path
//print("group path = \(group.path)")
let pathSplit = group.path.characters.split(separator: " ")
pathSplit.forEach { getDescription($0) }
}
closePath()
let effect = SKEffectNode()
var shape = SKShapeNode.init(path: path)
path = CGMutablePath()
shape.isAntialiased = true
shape.setScale(CGFloat(0.8))
shape.strokeColor = .black
//shape.fillColor = .cyan
shape.yScale = -shape.yScale
shape.position = midPoint
effect.addChild(shape)
let blurFilter = CIFilter(name:"CIGaussianBlur",
withInputParameters: ["inputRadius": 1])
effect.filter = blurFilter
scene.addChild(effect)
scene.backgroundColor = .white
view.presentScene(scene)
PlaygroundSupport.PlaygroundPage.current.liveView = view
PlaygroundPage.current.needsIndefiniteExecution = true
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