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test.js
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test.js
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'use strict'
require('enable-mobile')
require('insert-styles')(`
canvas {
display: block;
float: left;
}
`)
let sdf = require('./')
// polyfills
Number.isInteger = Number.isInteger || function(value) {
return typeof value === 'number' &&
isFinite(value) &&
Math.floor(value) === value;
}
Math.sign = Math.sign || function(x) {
return ((x > 0) - (x < 0)) || +x;
}
let roundn = require('round-to')
let shapes = {
circle: function(r) {
var rs = roundn(r, 2);
return 'M' + rs + ',0A' + rs + ',' + rs + ' 0 1,1 0,-' + rs +
'A' + rs + ',' + rs + ' 0 0,1 ' + rs + ',0Z';
},
square: function(r) {
var rs = roundn(r, 2);
return 'M' + rs + ',' + rs + 'H-' + rs + 'V-' + rs + 'H' + rs + 'Z';
},
diamond: function(r) {
var rd = roundn(r * 1.3, 2);
return 'M' + rd + ',0L0,' + rd + 'L-' + rd + ',0L0,-' + rd + 'Z';
},
cross: function(r) {
var rc = roundn(r * 0.4, 2),
rc2 = roundn(r * 1.2, 2);
return 'M' + rc2 + ',' + rc + 'H' + rc + 'V' + rc2 + 'H-' + rc +
'V' + rc + 'H-' + rc2 + 'V-' + rc + 'H-' + rc + 'V-' + rc2 +
'H' + rc + 'V-' + rc + 'H' + rc2 + 'Z';
},
x: function(r) {
var rx = roundn(r * 0.8 / Math.sqrt(2), 2),
ne = 'l' + rx + ',' + rx,
se = 'l' + rx + ',-' + rx,
sw = 'l-' + rx + ',-' + rx,
nw = 'l-' + rx + ',' + rx;
return 'M0,' + rx + ne + se + sw + se + sw + nw + sw + nw + ne + nw + ne + 'Z';
},
'triangle-up': function(r) {
var rt = roundn(r * 2 / Math.sqrt(3), 2),
r2 = roundn(r / 2, 2),
rs = roundn(r, 2);
return 'M-' + rt + ',' + r2 + 'H' + rt + 'L0,-' + rs + 'Z';
},
'triangle-down': function(r) {
var rt = roundn(r * 2 / Math.sqrt(3), 2),
r2 = roundn(r / 2, 2),
rs = roundn(r, 2);
return 'M-' + rt + ',-' + r2 + 'H' + rt + 'L0,' + rs + 'Z';
},
'triangle-left': function(r) {
var rt = roundn(r * 2 / Math.sqrt(3), 2),
r2 = roundn(r / 2, 2),
rs = roundn(r, 2);
return 'M' + r2 + ',-' + rt + 'V' + rt + 'L-' + rs + ',0Z';
},
'triangle-right': function(r) {
var rt = roundn(r * 2 / Math.sqrt(3), 2),
r2 = roundn(r / 2, 2),
rs = roundn(r, 2);
return 'M-' + r2 + ',-' + rt + 'V' + rt + 'L' + rs + ',0Z';
},
'triangle-ne': function(r) {
var r1 = roundn(r * 0.6, 2),
r2 = roundn(r * 1.2, 2);
return 'M-' + r2 + ',-' + r1 + 'H' + r1 + 'V' + r2 + 'Z';
},
'triangle-se': function(r) {
var r1 = roundn(r * 0.6, 2),
r2 = roundn(r * 1.2, 2);
return 'M' + r1 + ',-' + r2 + 'V' + r1 + 'H-' + r2 + 'Z';
},
'triangle-sw': function(r) {
var r1 = roundn(r * 0.6, 2),
r2 = roundn(r * 1.2, 2);
return 'M' + r2 + ',' + r1 + 'H-' + r1 + 'V-' + r2 + 'Z';
},
'triangle-nw': function(r) {
var r1 = roundn(r * 0.6, 2),
r2 = roundn(r * 1.2, 2);
return 'M-' + r1 + ',' + r2 + 'V-' + r1 + 'H' + r2 + 'Z';
},
pentagon: function(r) {
var x1 = roundn(r * 0.951, 2),
x2 = roundn(r * 0.588, 2),
y0 = roundn(-r, 2),
y1 = roundn(r * -0.309, 2),
y2 = roundn(r * 0.809, 2);
return 'M' + x1 + ',' + y1 + 'L' + x2 + ',' + y2 + 'H-' + x2 +
'L-' + x1 + ',' + y1 + 'L0,' + y0 + 'Z';
},
hexagon: function(r) {
var y0 = roundn(r, 2),
y1 = roundn(r / 2, 2),
x = roundn(r * Math.sqrt(3) / 2, 2);
return 'M' + x + ',-' + y1 + 'V' + y1 + 'L0,' + y0 +
'L-' + x + ',' + y1 + 'V-' + y1 + 'L0,-' + y0 + 'Z';
},
hexagon2: function(r) {
var x0 = roundn(r, 2),
x1 = roundn(r / 2, 2),
y = roundn(r * Math.sqrt(3) / 2, 2);
return 'M-' + x1 + ',' + y + 'H' + x1 + 'L' + x0 +
',0L' + x1 + ',-' + y + 'H-' + x1 + 'L-' + x0 + ',0Z';
},
octagon: function(r) {
var a = roundn(r * 0.924, 2),
b = roundn(r * 0.383, 2);
return 'M-' + b + ',-' + a + 'H' + b + 'L' + a + ',-' + b + 'V' + b +
'L' + b + ',' + a + 'H-' + b + 'L-' + a + ',' + b + 'V-' + b + 'Z';
},
star: function(r) {
var rs = r * 1.4,
x1 = roundn(rs * 0.225, 2),
x2 = roundn(rs * 0.951, 2),
x3 = roundn(rs * 0.363, 2),
x4 = roundn(rs * 0.588, 2),
y0 = roundn(-rs, 2),
y1 = roundn(rs * -0.309, 2),
y3 = roundn(rs * 0.118, 2),
y4 = roundn(rs * 0.809, 2),
y5 = roundn(rs * 0.382, 2);
return 'M' + x1 + ',' + y1 + 'H' + x2 + 'L' + x3 + ',' + y3 +
'L' + x4 + ',' + y4 + 'L0,' + y5 + 'L-' + x4 + ',' + y4 +
'L-' + x3 + ',' + y3 + 'L-' + x2 + ',' + y1 + 'H-' + x1 +
'L0,' + y0 + 'Z';
},
hexagram: function(r) {
var y = roundn(r * 0.66, 2),
x1 = roundn(r * 0.38, 2),
x2 = roundn(r * 0.76, 2);
return 'M-' + x2 + ',0l-' + x1 + ',-' + y + 'h' + x2 +
'l' + x1 + ',-' + y + 'l' + x1 + ',' + y + 'h' + x2 +
'l-' + x1 + ',' + y + 'l' + x1 + ',' + y + 'h-' + x2 +
'l-' + x1 + ',' + y + 'l-' + x1 + ',-' + y + 'h-' + x2 + 'Z';
},
'star-triangle-up': function(r) {
var x = roundn(r * Math.sqrt(3) * 0.8, 2),
y1 = roundn(r * 0.8, 2),
y2 = roundn(r * 1.6, 2),
rc = roundn(r * 4, 2),
aPart = 'A ' + rc + ',' + rc + ' 0 0 1 ';
return 'M-' + x + ',' + y1 + aPart + x + ',' + y1 +
aPart + '0,-' + y2 + aPart + '-' + x + ',' + y1 + 'Z';
},
'star-triangle-down': function(r) {
var x = roundn(r * Math.sqrt(3) * 0.8, 2),
y1 = roundn(r * 0.8, 2),
y2 = roundn(r * 1.6, 2),
rc = roundn(r * 4, 2),
aPart = 'A ' + rc + ',' + rc + ' 0 0 1 ';
return 'M' + x + ',-' + y1 + aPart + '-' + x + ',-' + y1 +
aPart + '0,' + y2 + aPart + x + ',-' + y1 + 'Z';
},
'star-square': function(r) {
var rp = roundn(r * 1.1, 2),
rc = roundn(r * 2, 2),
aPart = 'A ' + rc + ',' + rc + ' 0 0 1 ';
return 'M-' + rp + ',-' + rp + aPart + '-' + rp + ',' + rp +
aPart + rp + ',' + rp + aPart + rp + ',-' + rp +
aPart + '-' + rp + ',-' + rp + 'Z';
},
'star-diamond': function(r) {
var rp = roundn(r * 1.4, 2),
rc = roundn(r * 1.9, 2),
aPart = 'A ' + rc + ',' + rc + ' 0 0 1 ';
return 'M-' + rp + ',0' + aPart + '0,' + rp +
aPart + rp + ',0' + aPart + '0,-' + rp +
aPart + '-' + rp + ',0' + 'Z';
},
'diamond-tall': function(r) {
var x = roundn(r * 0.7, 2),
y = roundn(r * 1.4, 2);
return 'M0,' + y + 'L' + x + ',0L0,-' + y + 'L-' + x + ',0Z';
},
'diamond-wide': function(r) {
var x = roundn(r * 1.4, 2),
y = roundn(r * 0.7, 2);
return 'M0,' + y + 'L' + x + ',0L0,-' + y + 'L-' + x + ',0Z';
},
hourglass: function(r) {
var rs = roundn(r, 2);
return 'M' + rs + ',' + rs + 'H-' + rs + 'L' + rs + ',-' + rs + 'H-' + rs + 'Z';
},
bowtie: function(r) {
var rs = roundn(r, 2);
return 'M' + rs + ',' + rs + 'V-' + rs + 'L-' + rs + ',' + rs + 'V-' + rs + 'Z';
},
'circle-cross': function(r) {
var rs = roundn(r, 2);
return 'M0,' + rs + 'V-' + rs + 'M' + rs + ',0H-' + rs +
'M' + rs + ',0A' + rs + ',' + rs + ' 0 1,1 0,-' + rs +
'A' + rs + ',' + rs + ' 0 0,1 ' + rs + ',0Z';
},
'circle-x': function(r) {
var rs = roundn(r, 2),
rc = roundn(r / Math.sqrt(2), 2);
return 'M' + rc + ',' + rc + 'L-' + rc + ',-' + rc +
'M' + rc + ',-' + rc + 'L-' + rc + ',' + rc +
'M' + rs + ',0A' + rs + ',' + rs + ' 0 1,1 0,-' + rs +
'A' + rs + ',' + rs + ' 0 0,1 ' + rs + ',0Z';
},
'square-cross': function(r) {
var rs = roundn(r, 2);
return 'M0,' + rs + 'V-' + rs + 'M' + rs + ',0H-' + rs +
'M' + rs + ',' + rs + 'H-' + rs + 'V-' + rs + 'H' + rs + 'Z';
},
'square-x': function(r) {
var rs = roundn(r, 2);
return 'M' + rs + ',' + rs + 'L-' + rs + ',-' + rs +
'M' + rs + ',-' + rs + 'L-' + rs + ',' + rs +
'M' + rs + ',' + rs + 'H-' + rs + 'V-' + rs + 'H' + rs + 'Z';
},
'diamond-cross': function(r) {
var rd = roundn(r * 1.3, 2);
return 'M' + rd + ',0L0,' + rd + 'L-' + rd + ',0L0,-' + rd + 'Z' +
'M0,-' + rd + 'V' + rd + 'M-' + rd + ',0H' + rd;
},
'diamond-x': function(r) {
var rd = roundn(r * 1.3, 2),
r2 = roundn(r * 0.65, 2);
return 'M' + rd + ',0L0,' + rd + 'L-' + rd + ',0L0,-' + rd + 'Z' +
'M-' + r2 + ',-' + r2 + 'L' + r2 + ',' + r2 +
'M-' + r2 + ',' + r2 + 'L' + r2 + ',-' + r2;
},
'cross-thin': function(r) {
var rc = roundn(r * 1.4, 2);
return 'M0,' + rc + 'V-' + rc + 'M' + rc + ',0H-' + rc;
},
'x-thin': function(r) {
var rx = roundn(r, 2);
return 'M' + rx + ',' + rx + 'L-' + rx + ',-' + rx +
'M' + rx + ',-' + rx + 'L-' + rx + ',' + rx;
},
asterisk: function(r) {
var rc = roundn(r * 1.2, 2);
var rs = roundn(r * 0.85, 2);
return 'M0,' + rc + 'V-' + rc + 'M' + rc + ',0H-' + rc +
'M' + rs + ',' + rs + 'L-' + rs + ',-' + rs +
'M' + rs + ',-' + rs + 'L-' + rs + ',' + rs;
},
hash: function(r) {
var r1 = roundn(r / 2, 2),
r2 = roundn(r, 2);
return 'M' + r1 + ',' + r2 + 'V-' + r2 +
'm-' + r2 + ',0V' + r2 +
'M' + r2 + ',' + r1 + 'H-' + r2 +
'm0,-' + r2 + 'H' + r2;
},
'y-up': function(r) {
var x = roundn(r * 1.2, 2),
y0 = roundn(r * 1.6, 2),
y1 = roundn(r * 0.8, 2);
return 'M-' + x + ',' + y1 + 'L0,0M' + x + ',' + y1 + 'L0,0M0,-' + y0 + 'L0,0';
},
'y-down': function(r) {
var x = roundn(r * 1.2, 2),
y0 = roundn(r * 1.6, 2),
y1 = roundn(r * 0.8, 2);
return 'M-' + x + ',-' + y1 + 'L0,0M' + x + ',-' + y1 + 'L0,0M0,' + y0 + 'L0,0';
},
'y-left': function(r) {
var y = roundn(r * 1.2, 2),
x0 = roundn(r * 1.6, 2),
x1 = roundn(r * 0.8, 2);
return 'M' + x1 + ',' + y + 'L0,0M' + x1 + ',-' + y + 'L0,0M-' + x0 + ',0L0,0';
},
'y-right': function(r) {
var y = roundn(r * 1.2, 2),
x0 = roundn(r * 1.6, 2),
x1 = roundn(r * 0.8, 2);
return 'M-' + x1 + ',' + y + 'L0,0M-' + x1 + ',-' + y + 'L0,0M' + x0 + ',0L0,0';
},
'line-ew': function(r) {
var rc = roundn(r * 1.4, 2);
return 'M' + rc + ',0H-' + rc;
},
'line-ns': function(r) {
var rc = roundn(r * 1.4, 2);
return 'M0,' + rc + 'V-' + rc;
},
'line-ne': function(r) {
var rx = roundn(r, 2);
return 'M' + rx + ',-' + rx + 'L-' + rx + ',' + rx;
},
'line-nw': function(r) {
var rx = roundn(r, 2);
return 'M' + rx + ',' + rx + 'L-' + rx + ',-' + rx;
},
};
for (let name in shapes) {
let path = shapes[name](10) + shapes.circle(1)
// if (name != 'triangle-left') continue
showPath(path)
showSdf(sdf(path, {w: 77, h: 77, viewBox: [-10, -10, 10, 10], stroke: -2}))
}
function showPath (path) {
let cnv = document.body.appendChild(document.createElement('canvas'))
let ctx = cnv.getContext('2d')
let w = cnv.width = 77
let h = cnv.height = 77
ctx.fillStyle = 'black'
ctx.fillRect(0,0,w,h)
ctx.fillStyle = 'rgb(0,100,100)'
ctx.strokeStyle = 'white'
ctx.lineWidth = 2
ctx.translate(77/2, 77/2)
// IE fix
if (!window.Path2D) return;
let path2d = new Path2D(path)
// ctx.fill(path2d)
ctx.stroke(path2d)
ctx.setTransform(1, 0, 0, 1, 0, 0);
}
function showSdf (arr) {
let dim = Math.sqrt(arr.length)
let cnv = document.body.appendChild(document.createElement('canvas'))
let ctx = cnv.getContext('2d')
let w = cnv.width = dim
let h = cnv.height = dim
let iData = ctx.createImageData(w, h) //new ImageData(w, h)
let data = iData.data
for (let i = 0; i < w; i++) {
for (let j = 0; j < h; j++) {
data[i*w*4 + j*4 + 0] = arr[i*w + j] * 255
data[i*w*4 + j*4 + 1] = arr[i*w + j] * 255
data[i*w*4 + j*4 + 2] = arr[i*w + j] * 255
data[i*w*4 + j*4 + 3] = 255
}
}
ctx.putImageData(iData, 0, 0)
}