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SVG Mask Example
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| license: mit | |
| height: 0 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <html lang="ja"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <meta http-equiv="content-language" content="ja"> | |
| <title>D3 circle Mask</title> | |
| <script src="//unpkg.com/d3@4.12.2/build/d3.min.js"></script> | |
| <style> | |
| body { | |
| background-image : url("p5.png"); | |
| } | |
| svg { | |
| width:100%; | |
| height: 180px; | |
| } | |
| .wrapper { | |
| float:right; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div> | |
| <div class="wrapper"> | |
| <p>mask</p> | |
| <svg id="svg3"></svg> | |
| </div> | |
| <div class="wrapper"> | |
| <p>fill-opacity:0.5</p> | |
| <svg id="svg2"></svg> | |
| </div> | |
| <div class="wrapper"> | |
| <p>default</p> | |
| <svg id="svg1"></svg> | |
| </div> | |
| </div> | |
| <script> | |
| const dataSet =[ | |
| {r:20, color:"blue"}, | |
| {r:40, color:"red"}, | |
| {r:60, color:"blue"}, | |
| ] | |
| /*default*/ | |
| const svg1 = d3.select("#svg1") | |
| svg1.selectAll("circle") | |
| .data(dataSet.reverse()) | |
| .enter() | |
| .append("circle") | |
| .attr("cx", 100) | |
| .attr("cy", 60) | |
| .attr("r", d => d.r) | |
| .attr("fill", d => d.color) | |
| /*fill-opacity:0.5*/ | |
| const svg2 = d3.select("#svg2") | |
| svg2.selectAll("circle") | |
| .data(dataSet.reverse()) | |
| .enter() | |
| .append("circle") | |
| .attr("cx", 100) | |
| .attr("cy", 60) | |
| .attr("r", d => d.r) | |
| .attr("fill", d => d.color) | |
| .attr("fill-opacity", 0.5) | |
| /*mask*/ | |
| const svg3 = d3.select("#svg3") | |
| svg3.selectAll("circle") | |
| .data(dataSet) | |
| .enter() | |
| .append("circle") | |
| .attr("cx", 100) | |
| .attr("cy", 60) | |
| .attr("r", d => d.r) | |
| .attr("fill", d => d.color) | |
| .attr("fill-opacity", 0.5) | |
| .attr("mask", (d, i) => { | |
| if(i <= 0) return null; | |
| return `url(#mask${i}`; | |
| }) | |
| //部品の定義 | |
| const defs = svg3.append("defs"); | |
| dataSet.forEach(function(d, i){ | |
| if (i <= 0) return; | |
| //defs内にmask要素を追加 | |
| const mask = defs.append("mask") | |
| .attr("id", `mask${i}`); | |
| //mask表示領域の指定 | |
| mask.append("circle") | |
| .attr("cx", 100) | |
| .attr("cy", 60) | |
| .attr("r", dataSet[i].r) | |
| .attr("fill", "white") | |
| //mask非表示領域の指定 | |
| mask.append("circle") | |
| .attr("cx", 100) | |
| .attr("cy", 60) | |
| .attr("fill", "black") | |
| .attr("r", dataSet[i-1].r) | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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