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// Module for array conversion
SVG.Array = function(array, fallback) {
array = (array || []).valueOf()
/* if array is empty and fallback is provided, use fallback */
if (array.length == 0 && fallback)
array = fallback.valueOf()
/* parse array */
this.value = this.parse(array)
}
SVG.extend(SVG.Array, {
// Make array morphable
morph: function(array) {
this.destination = this.parse(array)
/* normalize length of arrays */
if (this.value.length != this.destination.length) {
var lastValue = this.value[this.value.length - 1]
, lastDestination = this.destination[this.destination.length - 1]
while(this.value.length > this.destination.length)
this.destination.push(lastDestination)
while(this.value.length < this.destination.length)
this.value.push(lastValue)
}
return this
}
// Clean up any duplicate points
, settle: function() {
var i, seen = []
/* find all unique values */
for (i = this.value.length - 1; i >= 0; i--)
if (seen.indexOf(this.value[i]) == -1)
seen.push(this.value[i])
/* set new value */
return this.value = seen
}
// Get morphed array at given position
, at: function(pos) {
/* make sure a destination is defined */
if (!this.destination) return this
/* generate morphed array */
for (var i = 0, il = this.value.length, array = []; i < il; i++)
array.push(this.value[i] + (this.destination[i] - this.value[i]) * pos)
return new SVG.Array(array)
}
// Convert array to string
, toString: function() {
return this.value.join(' ')
}
// Real value
, valueOf: function() {
return this.value
}
// Parse whitespace separated string
, parse: function(array) {
array = array.valueOf()
/* if already is an array, no need to parse it */
if (Array.isArray(array)) return array
return this.split(array)
}
// Strip unnecessary whitespace
, split: function(string) {
return string.replace(/\s+/g, ' ').replace(/^\s+|\s+$/g,'').split(' ')
}
})
// Poly points array
SVG.PointArray = function() {
this.constructor.apply(this, arguments)
}
// Inherit from SVG.Array
SVG.PointArray.prototype = new SVG.Array
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(' ')
}
// 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
, parse: function(array) {
array = array.valueOf()
/* if already is an array, no need to parse it */
if (Array.isArray(array)) return array
/* split points */
array = this.split(array)
/* parse points */
for (var i = 0, il = array.length, p, points = []; i < il; i++) {
p = array[i].split(',')
points.push([parseFloat(p[0]), parseFloat(p[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 */
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, box = this.bbox()
/* recalculate position of all points according to new size */
for (i = this.value.length - 1; i >= 0; i--) {
this.value[i][0] = ((this.value[i][0] - box.x) * width) / box.width + box.x
this.value[i][1] = ((this.value[i][1] - box.y) * height) / box.height + box.x
}
return this
}
// Get bounding box of points
, bbox: function() {
if (this.value.length == 0)
return { x: 0, y: 0, width: 0, height: 0 }
var i
, x = this.value[0][0]
, y = this.value[0][1]
, box = { x: x, y: y }
/* find position */
for (i = this.value.length - 1; i >= 0; i--) {
if (this.value[i][0] < box.x)
box.x = this.value[i][0]
if (this.value[i][1] < box.y)
box.y = this.value[i][1]
if (this.value[i][0] > x)
x = this.value[i][0]
if (this.value[i][1] > y)
y = this.value[i][1]
}
/* calculate size */
box.width = x - box.x
box.height = y - box.y
return box
}
})
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