Mouse up and down to change the hue. Left and right to change the saturation and lightness.
Last active
November 25, 2015 03:16
HSL Grid
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<html> | |
<head> | |
<title>HSL Grid</title> | |
</head> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
<script> | |
var width = 500, | |
height = 500; | |
var scale = { | |
x: d3.scale.ordinal().rangeRoundBands([0, width]), | |
y: d3.scale.ordinal().rangeRoundBands([height, 0]), | |
h: d3.scale.linear().range([0, 50]), | |
s: d3.scale.sqrt().range([0, 1]), | |
l: d3.scale.sqrt().range([0, 1]), | |
mouse: { | |
x: d3.scale.linear() | |
.domain([0, width]) | |
.range([0, 1]), | |
y: d3.scale.linear() | |
.domain([height, 0]) | |
.range([50, 360]) | |
} | |
}; | |
var canvas = d3.select("body").append("canvas") | |
.attr("width", width) | |
.attr("height", height); | |
var context = canvas.node().getContext("2d"); | |
var cells = { x: 20, y: 20 }; | |
cells.data = d3.range(cells.x * cells.y) | |
.map(function(i) { | |
var x = i % cells.x, | |
y = Math.floor(i / cells.x); | |
return { x, y }; | |
}); | |
scale.x.domain(cells.data.map(function(d) { return d.x; })); | |
scale.y.domain(cells.data.map(function(d) { return d.y; })); | |
scale.h.domain([0, cells.x * cells.y]); | |
scale.s.domain([0, cells.x]); | |
scale.l.domain([0, cells.y]); | |
draw(cells); | |
canvas.on("mousemove", function() { | |
var mouse = d3.mouse(this); | |
draw(cells, { | |
x: mouse[0], | |
y: mouse[1] | |
}); | |
}); | |
function draw(cells, mouse) { | |
if (mouse === undefined) mouse = {x: 0, y: 0}; | |
scale.h.range([ | |
scale.mouse.y(mouse.y) - 50, | |
scale.mouse.y(mouse.y) | |
]); | |
scale.s.range([scale.mouse.x(mouse.x), 1]); | |
scale.l.range([scale.mouse.x(mouse.x), 1]); | |
cells.data.forEach(function(cell) { | |
var x = scale.x(cell.x), | |
y = scale.y(cell.y), | |
dx = scale.x.rangeBand(), | |
dy = scale.y.rangeBand(), | |
h = scale.h(cell.x * cell.y), | |
s = scale.s(cell.x), | |
l = scale.l(cell.y), | |
hsl = d3.hsl(h, s, l); | |
context.fillStyle = hsl.rgb().toString(); | |
context.fillRect(x, y, dx, dy); | |
}); | |
} | |
d3.select(self.frameElement) | |
.style("width", width + "px") | |
.style("height", height + "px"); | |
</script> | |
</body> | |
</html> |
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