A simple implementation of fog of war using a grid (built from a voronoi diagram using a grid of data). Mouseover the darkened region to reveal the data (or lack of data) underneath.
Last active
March 19, 2025 04:14
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Fog of War II
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Fog of War with Grid</title> | |
| <style> | |
| </style> | |
| </head> | |
| <body> | |
| <svg width="500" height="500" /> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.16/d3.min.js" charset="utf-8" type="text/javascript"></script> | |
| <script type="text/javascript"> | |
| vertices = [[162, 332], [182, 299], [141, 292], [158, 264], [141, 408], [160, 400], [177, 430], [151, 442], [155, 425], [134, 430], [126, 447], [139, 466], [160, 471], [167, 447], [182, 466], [192, 442], [187, 413], [173, 403], [168, 425], [153, 413], [179, 275], [163, 292], [134, 270], [143, 315], [177, 320], [163, 311], [162, 281], [182, 255], [141, 226], [156, 235], [173, 207], [187, 230], [204, 194], [165, 189], [145, 201], [158, 167], [190, 165], [206, 145], [179, 153], [204, 114], [221, 138], [243, 112], [248, 139], [177, 122], [179, 99], [196, 82], [219, 90], [240, 75], [218, 61], [228, 53], [211, 34], [197, 51], [179, 65], [155, 70], [165, 85], [134, 80], [124, 58], [153, 44], [173, 34], [192, 27], [156, 19], [119, 32], [128, 17], [138, 36], [100, 58], [112, 73], [100, 92], [78, 100], [83, 78], [61, 63], [80, 44], [100, 26], [60, 39], [43, 71], [34, 54], [32, 90], [53, 104], [60, 82], [66, 99], [247, 94], [187, 180], [221, 168]]; | |
| voronoi = d3.geom.voronoi() | |
| .x(function (d) {return d[0]}) | |
| .y(function (d) {return d[1]}) | |
| .clipExtent([[0,0],[500,500]]) | |
| basemap = []; | |
| d3.range(20).forEach(function (d) { | |
| d3.range(20).forEach(function (p) { | |
| basemap.push([d * 25, p * 25]) | |
| }) | |
| }) | |
| d3.select("svg").selectAll("circle") | |
| .data(vertices) | |
| .enter() | |
| .append("circle") | |
| .attr("cx", function (d) {return d[0]}) | |
| .attr("cy", function (d) {return d[1]}) | |
| .style("fill", "#001276") | |
| .attr("r", 2); | |
| d3.select("svg").selectAll("path") | |
| .data(voronoi(basemap)) | |
| .enter() | |
| .append("path") | |
| .attr("d", function (d) {return "M" + d.join("L") + "Z"; }) | |
| .style("fill", "#001276") | |
| .style("stroke", "#001276") | |
| .on("mouseover", defog) | |
| function defog(d) { | |
| d3.select(this) | |
| .transition() | |
| .duration(1000) | |
| .style("opacity", 0) | |
| } | |
| </script> | |
| </body> | |
| </html> |
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