82 lines
2 KiB
JavaScript
82 lines
2 KiB
JavaScript
const AutoLayout = {
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nextX: 0,
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nextY: 0,
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sideLength: 1,
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turnCount: 0,
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nextXshift: 1,
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nextYshift: 0,
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timeToTurn: 0,
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getNextCoord: function (opts = {}) {
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var self = AutoLayout
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var nextX = self.nextX
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var nextY = self.nextY
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var DISTANCE_BETWEEN = 120
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self.nextX = self.nextX + DISTANCE_BETWEEN * self.nextXshift
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self.nextY = self.nextY + DISTANCE_BETWEEN * self.nextYshift
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self.timeToTurn += 1
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// if true, it's time to turn
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if (self.timeToTurn === self.sideLength) {
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self.turnCount += 1
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// if true, it's time to increase side length
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if (self.turnCount % 2 === 0) {
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self.sideLength += 1
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}
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self.timeToTurn = 0
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// going right? turn down
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if (self.nextXshift == 1 && self.nextYshift == 0) {
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self.nextXshift = 0
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self.nextYshift = 1
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}
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// going down? turn left
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else if (self.nextXshift == 0 && self.nextYshift == 1) {
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self.nextXshift = -1
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self.nextYshift = 0
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}
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// going left? turn up
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else if (self.nextXshift == -1 && self.nextYshift == 0) {
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self.nextXshift = 0
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self.nextYshift = -1
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}
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// going up? turn right
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else if (self.nextXshift == 0 && self.nextYshift == -1) {
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self.nextXshift = 1
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self.nextYshift = 0
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}
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}
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if (opts.mappings && self.coordsTaken(nextX, nextY, opts.mappings)) {
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// check if the coordinate is already taken on the current map
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return self.getNextCoord(opts)
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} else {
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return {
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x: nextX,
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y: nextY
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}
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}
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},
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coordsTaken: function (x, y, mappings) {
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if (mappings.findWhere({ xloc: x, yloc: y })) {
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return true
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} else {
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return false
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}
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},
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resetSpiral: function () {
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var self = AutoLayout
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self.nextX = 0
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self.nextY = 0
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self.nextXshift = 1
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self.nextYshift = 0
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self.sideLength = 1
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self.timeToTurn = 0
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self.turnCount = 0
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}
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}
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export default AutoLayout
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