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rectangles optical illusion (grids)
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| license: mit |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font-family: Helvetica; | |
| font-size: 20px; | |
| } | |
| rect { | |
| fill: none; | |
| opacity: .3; | |
| stroke: black; | |
| stroke-width: 1; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v4.js"></script> | |
| <script src="http://romsson.github.io/d3-gridding/build/d3-gridding.js"></script> | |
| <script> | |
| var width = 400, | |
| height = 400; | |
| // params to play with | |
| var n = 1, | |
| data = d3.range(n), | |
| max_depth = 10; | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| var root_params = { | |
| "size": [width, height], | |
| "offset": [0, 0], | |
| "mode": "grid", | |
| "padding": 0 | |
| }; | |
| function generate_layout(params, data = d3.range(16), depth = 0) { | |
| var gridding = d3.gridding() | |
| .params(params); | |
| var griddingData = gridding(data); | |
| draw(griddingData); | |
| griddingData.forEach(function(d) { | |
| if(depth < max_depth) { | |
| var node_params = { | |
| "size": [d.width, d.height], | |
| "offset": [d.x, d.y], | |
| "mode": "grid", | |
| "margin": 5 | |
| }; | |
| var data = d3.range(1); | |
| gridding.params(node_params); | |
| var griddingData = gridding(data); | |
| generate_layout(node_params, data, depth+1); | |
| } | |
| }); | |
| } | |
| function draw(griddingData) { | |
| var id = Math.floor(Math.random(100) * 10000000000); | |
| var squares = svg.selectAll("#square_" + id) | |
| .data(griddingData, function(d) { return d; }); | |
| squares.enter().append("rect") | |
| .attr("class", "square") | |
| .attr("id", "square_" + id) | |
| .style("opacity", 1) | |
| .style("stroke", "black") | |
| .style("stroke-width", 2) | |
| .attr("width", function(d) { return d.width; }) | |
| .attr("height", function(d) { return d.height; }) | |
| .attr("transform", function(d) { | |
| return "translate(" + d.x + "," + d.y + ")"; | |
| }); | |
| } | |
| generate_layout(root_params); | |
| </script> | |
| </body> |
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