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地球儀 - ドロップシャドウエフェクト
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| html, body { | |
| margin: 0px; | |
| padding: 0px; | |
| } | |
| </style> | |
| <body> | |
| <svg> | |
| <defs> | |
| <filter id="drop-shadow" width="150%" height="150%"> | |
| <feGaussianBlur in="SourceAlpha" result="blur" stdDeviation="2"></feGaussianBlur> | |
| <feOffset result="offsetBlur" dx="4" dy="4"></feOffset><feBlend in="SourceGraphic" in2="offsetBlur" mode="normal"></feBlend> | |
| </filter> | |
| </defs> | |
| </svg> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script> | |
| <script> | |
| (function(){ | |
| "use strict"; | |
| var w = 960; | |
| var h = 500; | |
| var svg = d3.select("svg").attr("width", w).attr("height", h); | |
| var projection90 = d3.geo.orthographic() | |
| .scale(245) | |
| .rotate([0,0,0]) | |
| .translate([w / 2, h / 2]) | |
| .clipAngle(90); | |
| var projection180 = d3.geo.orthographic() | |
| .scale(245) | |
| .rotate([0,0,0]) | |
| .translate([w / 2, h / 2]) | |
| .clipAngle(180); | |
| var frontPath = d3.geo.path().projection(projection90); | |
| var backPath = d3.geo.path().projection(projection180); | |
| d3.json("https://gist.githubusercontent.com/shimizu/97c156f7f9137586f784/raw/4be1053346fa88d448c2290c49689634c8102b0a/Landmasses.geojson", function(geojson){ | |
| var stage = svg.append("svg:g"); | |
| var backMap = stage.append("svg:path") | |
| .attr({ | |
| "d":function(){ return backPath(geojson)}, | |
| "fill-opacity":1, | |
| "fill":"gray", | |
| "stroke":"none", | |
| }); | |
| var frontMap = stage.append("svg:path") | |
| .attr({ | |
| "d":function(){ return frontPath(geojson)}, | |
| "fill-opacity":1, | |
| "fill":"blue", | |
| "stroke":"none", | |
| "filter": "url(#drop-shadow)" | |
| }); | |
| // Reference from http://bl.ocks.org/mbostock/6738360 | |
| var m0, o0; | |
| var update = function(){ | |
| backMap.attr("d", function(){ return backPath(geojson)}); | |
| frontMap.attr("d", function(){ return frontPath(geojson)}); | |
| } | |
| var mousedown = function () { | |
| m0 = [d3.event.pageX, d3.event.pageY]; | |
| o0 = projection90.rotate(); | |
| d3.event.preventDefault(); | |
| } | |
| var mousemove = function () { | |
| if (m0) { | |
| var m1 = [d3.event.pageX, d3.event.pageY]; | |
| var o1 = [o0[0] + (m1[0] - m0[0]) / 6, o0[1] + (m0[1] - m1[1]) / 6]; | |
| o1[1] = o1[1] > 30 ? 30 : | |
| o1[1] < -30 ? -30 : | |
| o1[1]; | |
| projection90.rotate(o1); | |
| projection180.rotate(o1); | |
| update(); | |
| } | |
| } | |
| var mouseup = function () { | |
| if (m0) { | |
| mousemove(); | |
| m0 = null; | |
| } | |
| } | |
| d3.select(window) | |
| .on("mousemove", mousemove) | |
| .on("mouseup", mouseup); | |
| svg.on("mousedown", mousedown); | |
| }); | |
| })(); | |
| </script> | |
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