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var Grid = (function(){
var Grid = function(opt){
var horizontal = this.horizontal = []
var vertical = this.vertical = []
var x, xmin, xmax
var y, ymin, ymax
var dx = opt.strokeWidth + opt.side
var dy = dx
var i
var s
opt = this.opt = defaults(opt, {
bg: "#ffffff",
stroke: "#000000",
strokeWidth: 2,
side: 10,
delay: 0,
shuffleDelay: false,
randomizeDelay: false,
duration: 500,
width: 300,
height: 300,
halign: "left",
valign: "top",
snap: null,
})
if (typeof opt.stroke == 'string') opt.stroke = [opt.stroke]
if (typeof opt.delay == 'string') opt.delay = [opt.delay]
if (opt.snap) {
s = this.snap = opt.snap
} else {
s = this.snap = Snap(opt.width, opt.height)
s.attr({ viewBox: "0 0 " + opt.width + " " + opt.height })
}
switch (opt.halign) {
case "right":
ymin = opt.height % dy
ymax = opt.height + 1
break
default:
case "left":
ymin = 0
ymax = opt.height
break
}
switch (opt.valign) {
case "bottom":
xmin = opt.width % dx
xmax = opt.width + 1
break
default:
case "top":
xmin = 0
xmax = opt.width
break
}
this.bg = s.rect(0, 0, "100%", "100%").attr({ fill: opt.bg })
this.pos = {
dx: dx, xmin: xmin, xmax: xmax,
dy: dy, ymin: ymin, ymax: ymax,
}
for (i = 0, x = xmin; x < xmax; x += dx, i++) {
vertical.push( s.path().attr({
strokeWidth: opt.strokeWidth,
stroke: opt.stroke[ i % opt.stroke.length ],
}) )
}
for (i = 0, y = ymin; y < ymax; y += dy, i++) {
horizontal.push( s.path().attr({
strokeWidth: opt.strokeWidth,
stroke: opt.stroke[ i % opt.stroke.length ],
}) )
}
}
Grid.prototype.animate = function(opt, cb){
opt = defaults(opt, {
h: "right",
v: "down",
})
var duration = this.opt.duration
var height = this.opt.height, width = this.opt.width
var x = this.pos.xmin, y = this.pos.ymin
var right = opt.h == "right"
var down = opt.v == "down"
this.vertical.forEach(function(p, i){
var start_path, end_path
if (down) {
start_path = vpath( x, 0, 0 )
end_path = vpath( x, 0, height )
}
else {
start_path = vpath( x, height, 0 )
end_path = vpath( x, height, -height )
}
var delay = this.opt.randomizeDelay
? choice(this.opt.delay)
: this.opt.delay[i % this.opt.delay.length]
p.attr({ d: start_path })
setTimeout(function(){
p.animate({ d: end_path }, duration)
}, delay)
x += this.pos.dx
}.bind(this))
this.horizontal.forEach(function(p, i){
var start_path, end_path
if (right) {
start_path = hpath( 0, y, 0 )
end_path = hpath( 0, y, width )
}
else {
start_path = hpath( width, y, 0 )
end_path = hpath( width, y, -width )
}
var delay
if (this.opt.shuffleDelay) {
delay = randrange.apply(null, this.opt.delay)
}
else if (this.opt.randomizeDelay) {
delay = choice(this.opt.delay)
}
else {
delay = this.opt.delay[i % this.opt.delay.length]
}
p.attr({ d: start_path })
setTimeout(function(){
p.animate({ d: end_path }, duration)
}, delay)
y += this.pos.dy
}.bind(this))
var max_delay = Math.max.apply(Math, this.opt.delay)
cb && setTimeout(cb, this.opt.duration + max_delay + 20)
}
function hpath (x, y, w) {
return "M" + x + " " + y + "h" + w
}
function vpath (x, y, w) {
return "M" + x + " " + y + "v" + w
}
return Grid
})()
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