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// Poly points array
SVG.PointArray = function (array, fallback) {
SVG.Array.call(this, array, fallback || [[0, 0]])
}
// Inherit from SVG.Array
SVG.PointArray.prototype = new SVG.Array()
SVG.PointArray.prototype.constructor = SVG.PointArray
SVG.extend(SVG.PointArray, {
// Convert array to string
toString: function () {
// convert to a poly point string
for (var i = 0, il = this.value.length, array = []; i < il; i++) {
array.push(this.value[i].join(','))
}
return array.join(' ')
},
toArray: function () {
return this.value.reduce(function (prev, curr) {
return [].concat.call(prev, curr)
}, [])
},
// Convert array to line object
toLine: function () {
return {
x1: this.value[0][0],
y1: this.value[0][1],
x2: this.value[1][0],
y2: this.value[1][1]
}
},
// Get morphed array at given position
at: function (pos) {
// make sure a destination is defined
if (!this.destination) return this
// generate morphed point string
for (var i = 0, il = this.value.length, array = []; i < il; i++) {
array.push([
this.value[i][0] + (this.destination[i][0] - this.value[i][0]) * pos,
this.value[i][1] + (this.destination[i][1] - this.value[i][1]) * pos
])
}
return new SVG.PointArray(array)
},
// Parse point string and flat array
parse: function (array) {
var points = []
array = array.valueOf()
// if it is an array
if (Array.isArray(array)) {
// and it is not flat, there is no need to parse it
if (Array.isArray(array[0])) {
return array
}
} else { // Else, it is considered as a string
// parse points
array = array.trim().split(SVG.regex.delimiter).map(parseFloat)
}
// validate points - https://svgwg.org/svg2-draft/shapes.html#DataTypePoints
// Odd number of coordinates is an error. In such cases, drop the last odd coordinate.
if (array.length % 2 !== 0) array.pop()
// wrap points in two-tuples and parse points as floats
for (var i = 0, len = array.length; i < len; i = i + 2) {
points.push([ array[i], array[i + 1] ])
}
return points
},
// Move point string
move: function (x, y) {
var box = this.bbox()
// get relative offset
x -= box.x
y -= box.y
// move every point
if (!isNaN(x) && !isNaN(y)) {
for (var i = this.value.length - 1; i >= 0; i--) {
this.value[i] = [this.value[i][0] + x, this.value[i][1] + y]
}
}
return this
},
// Resize poly string
size: function (width, height) {
var i
var box = this.bbox()
// recalculate position of all points according to new size
for (i = this.value.length - 1; i >= 0; i--) {
if (box.width) this.value[i][0] = ((this.value[i][0] - box.x) * width) / box.width + box.x
if (box.height) this.value[i][1] = ((this.value[i][1] - box.y) * height) / box.height + box.y
}
return this
},
// Get bounding box of points
bbox: function () {
var maxX = -Infinity
var maxY = -Infinity
var minX = Infinity
var minY = Infinity
this.value.forEach(function (el) {
maxX = Math.max(el[0], maxX)
maxY = Math.max(el[1], maxY)
minX = Math.min(el[0], minX)
minY = Math.min(el[1], minY)
})
return {x: minX, y: minY, width: maxX - minX, height: maxY - minY}
}
})
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