Created
September 25, 2017 17:54
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| license: gpl-3.0 | |
| height: 600 | |
| scrolling: no | |
| border: yes |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title></title> | |
| </head> | |
| <style> | |
| .container { | |
| display: flex; | |
| } | |
| </style> | |
| <body> | |
| <div class='container'> | |
| <div class='canvas'> | |
| </div> | |
| <button onclick="add_step(true)">bigger</button> | |
| </div> | |
| <script src='https://d3js.org/d3.v4.min.js'></script> | |
| <script src='main.js'></script> | |
| </body> | |
| </html> |
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| var width = 800, | |
| height = 600; | |
| var currentX = 0, | |
| currentY = 0, | |
| step = 20; | |
| var color_scale = d3.scaleLinear() | |
| .domain([0, 1]) | |
| .range(['blue', 'red']); | |
| function generate_line() { | |
| var x0 = currentX, | |
| y0 = currentY, | |
| x1, y1; | |
| var random_value = Math.random() | |
| if (random_value < 0.25) { | |
| x1 = currentX + step; | |
| y1 = currentY + step; | |
| } else if (random_value < 0.5) { | |
| x0 = currentX + step; | |
| x1 = currentX; | |
| y1 = currentY + step; | |
| } else if (random_value < 0.75) { | |
| x0 = currentX; | |
| x1 = currentX; | |
| y0 = currentY; | |
| y1 = currentY + step; | |
| } else { | |
| x0 = currentX; | |
| x1 = currentX + step; | |
| y0 = currentY + step; | |
| y1 = currentY + step; | |
| } | |
| currentX += step; | |
| if (currentX > width) { | |
| currentX = 0; | |
| currentY += step; | |
| } | |
| return `M${x0},${y0}L${x1},${y1}`; | |
| } | |
| var canvas = d3.select('.canvas') | |
| .append('svg') | |
| .attr('width', width) | |
| .attr('height', height); | |
| function t() { | |
| canvas.append('path') | |
| .attr("d", generate_line) | |
| .attr("stroke", 'black') | |
| .attr("stroke-width", 2); | |
| }; | |
| for (i = 0; i < width*height/(step*(step - 1)); i++) | |
| t(); | |
| function generate() { | |
| currentX = 0; | |
| currentY = 0; | |
| d3.selectAll('path') | |
| .transition(200) | |
| .attr('d', generate_line) | |
| .attr('stroke', color_scale(Math.random())); | |
| } | |
| d3.interval(generate, 500); | |
| function add_step(add) { | |
| if (add) | |
| step++; | |
| else | |
| step--; | |
| }; |
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