{"id":32544,"date":"2024-11-25T16:40:42","date_gmt":"2024-11-25T08:40:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/32544\/"},"modified":"2024-11-25T16:40:42","modified_gmt":"2024-11-25T08:40:42","slug":"paper-js%e5%85%a5%e9%97%a8%e6%8c%87%e5%8d%97%ef%bc%9a%e5%8a%a8%e7%94%bb%e5%92%8c%e5%9b%be%e5%83%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/32544\/","title":{"rendered":"Paper.js\u5165\u95e8\u6307\u5357\uff1a\u52a8\u753b\u548c\u56fe\u50cf"},"content":{"rendered":"

\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u5728\u672c\u7cfb\u5217\u4e2d\uff0c\u6211\u5df2\u7ecf\u4ecb\u7ecd\u4e86 paper.js \u4e2d\u7684\u9879\u76ee\u548c\u9879\u76ee\u3001\u8def\u5f84\u548c\u51e0\u4f55\u56fe\u5f62\u4ee5\u53ca\u7528\u6237\u4ea4\u4e92\u3002\u8be5\u5e93\u8fd8\u5141\u8bb8\u60a8\u4e3a\u9879\u76ee\u4e2d\u7684\u5404\u79cd\u9879\u76ee\u5236\u4f5c\u52a8\u753b\u3002\u5982\u679c\u5c06\u5176\u4e0e\u6839\u636e\u7528\u6237\u8f93\u5165\u8fdb\u884c\u64cd\u4f5c\u7684\u80fd\u529b\u76f8\u7ed3\u5408\uff0c\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e9b\u975e\u5e38\u9177\u7684\u6548\u679c\u3002\u672c\u6559\u7a0b\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728 paper.js \u4e2d\u4e3a\u9879\u76ee\u8bbe\u7f6e\u52a8\u753b\u3002<\/p>\n

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\u52a8\u753b\u57fa\u7840\u77e5\u8bc6<\/h2>\n

Paper.js \u4e2d\u7684\u6240\u6709\u52a8\u753b\u5747\u7531 onFrame \u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u5904\u7406\u3002\u5904\u7406\u7a0b\u5e8f\u5185\u7684\u4ee3\u7801\u6bcf\u79d2\u6267\u884c\u6700\u591a 60 \u6b21\u3002\u6bcf\u6b21\u6267\u884c\u540e\u89c6\u56fe\u90fd\u4f1a\u81ea\u52a8\u91cd\u7ed8\u3002\u9010\u6e10\u6539\u53d8\u51fd\u6570\u5185\u90e8\u7684\u4e00\u4e9b\u5c5e\u6027\u53ef\u4ee5\u521b\u5efa\u4e00\u4e9b\u975e\u5e38\u597d\u7684\u6548\u679c\u3002<\/p>\n

onFrame \u5904\u7406\u51fd\u6570\u8fd8\u63a5\u6536 event \u5bf9\u8c61\u3002\u8be5\u5bf9\u8c61\u5177\u6709\u4e09\u4e2a\u5c5e\u6027\uff0c\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e0e\u52a8\u753b\u76f8\u5173\u7684\u4fe1\u606f\u3002 <\/p>\n

\u7b2c\u4e00\u4e2a\u662f event.count\uff0c\u5b83\u544a\u8bc9\u6211\u4eec\u5904\u7406\u7a0b\u5e8f\u6267\u884c\u7684\u6b21\u6570\u3002\u7b2c\u4e8c\u4e2a\u662f event.delta\uff0c\u5b83\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u81ea\u4e0a\u6b21\u6267\u884c\u5904\u7406\u7a0b\u5e8f\u4ee5\u6765\u7ecf\u8fc7\u7684\u603b\u65f6\u95f4\u3002\u7b2c\u4e09\u4e2a\u662f event.time\uff0c\u5b83\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u81ea\u7b2c\u4e00\u5e27\u4e8b\u4ef6\u4ee5\u6765\u7ecf\u8fc7\u7684\u65f6\u95f4\u3002<\/p>\n

\u60a8\u53ef\u4ee5\u5728\u5904\u7406\u7a0b\u5e8f\u4e2d\u4e3a\u8bb8\u591a\u5c5e\u6027\u8bbe\u7f6e\u52a8\u753b\u3002\u5728\u6211\u4eec\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u5c06\u65cb\u8f6c\u4e09\u4e2a\u77e9\u5f62\u5e76\u66f4\u6539\u4e2d\u5fc3\u77e9\u5f62\u7684\u8272\u8c03\u3002\u8003\u8651\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n

var rectA = new Path.Rectangle({\n  point: [300, 100],\n  size: [200, 150],\n  strokeColor: 'yellow',\n  strokeWidth: 10\n});\n\nvar rectB = rectA.clone();\nrectB.strokeColor = 'orange';\nrectB.scale(0.8);\nvar rectC = rectA.clone();\nrectC.strokeColor = 'black';\nrectC.scale(1.2);\n\nfunction onFrame(event) {\n  rectA.strokeColor.hue += 10 * event.delta;\n  rectA.rotate(2);\n  rectB.rotate(2);\n  rectC.rotate(2);\n}\n<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4ece\u4e0a\u9762\u7684\u4ee3\u7801\u7247\u6bb5\u53ef\u4ee5\u660e\u663e\u770b\u51fa\uff0c\u4e3a\u77e9\u5f62\u8bbe\u7f6e\u52a8\u753b\u6240\u9700\u7684\u5b9e\u9645\u4ee3\u7801\u975e\u5e38\u5c11\u3002\u5bf9\u4e8e\u77e9\u5f62 A\uff0c\u6211\u4eec\u5728\u6bcf\u6b21\u6267\u884c onFrame \u5904\u7406\u7a0b\u5e8f\u65f6\u5c06\u8272\u8c03\u589e\u52a0 10 \u500d event.delta\u3002 event.delta \u7684\u503c\u4e00\u822c\u4f1a\u63a5\u8fd1 0.01\u3002\u5982\u679c\u6211\u6ca1\u6709\u5c06\u5176\u503c\u4e58\u4ee5 10\uff0c\u5219\u9700\u8981\u5f88\u957f\u65f6\u95f4\u624d\u80fd\u6ce8\u610f\u5230\u989c\u8272\u7684\u53d8\u5316\u3002 <\/p>\n
\u6bcf\u6b21\u6267\u884c\u4ee3\u7801\u65f6\uff0c\u6211\u90fd\u4f1a\u5c06\u6bcf\u4e2a\u77e9\u5f62\u65cb\u8f6c 2 \u5ea6\u3002\u5982\u679c\u6211\u4eec\u4f7f\u7528\u503c event.time \u6765\u65cb\u8f6c\u77e9\u5f62\uff0c\u4e00\u6bb5\u65f6\u95f4\u540e\u65cb\u8f6c\u4f1a\u53d8\u5f97\u975e\u5e38\u5feb\u3002<\/p>\n
\u60a8\u8fd8\u53ef\u4ee5\u4e3a\u5404\u4e2a\u7247\u6bb5\u8bbe\u7f6e\u52a8\u753b\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u4e3a\u6574\u4e2a\u8def\u5f84\u6216\u9879\u76ee\u8bbe\u7f6e\u52a8\u753b\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u672c\u8eab\u975e\u5e38\u7b80\u5355\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 path.segments \u8fd4\u56de\u6784\u6210\u8def\u5f84\u7684\u6240\u6709\u6bb5\u7684\u6570\u7ec4\u3002\u53ef\u4ee5\u901a\u8fc7\u63d0\u4f9b index \u503c\u6765\u8bbf\u95ee\u5404\u4e2a\u6bb5\u3002\u5728\u8fdb\u4e00\u6b65\u8ba8\u8bba\u4e4b\u524d\uff0c\u6211\u5e0c\u671b\u60a8\u770b\u4e00\u4e0b\u4e0b\u9762\u7684\u4ee3\u7801\u3002<\/p>\n
var aSquare = new Path.RegularPolygon(new Point(550, 200), 4, 100);\naSquare.fillColor = 'pink';\naSquare.fullySelected = true;\n\nfunction onFrame(event) {\n  for (var i = 0; i \n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528 Path.RegularPolygon(center, Sides, radius) \u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u6b63\u65b9\u5f62\u3002 sides \u53c2\u6570\u786e\u5b9a\u591a\u8fb9\u5f62\u7684\u8fb9\u6570\u3002 radius \u53c2\u6570\u51b3\u5b9a\u591a\u8fb9\u5f62\u7684\u5927\u5c0f\u3002\u6211\u8fd8\u5c06 completelySelected \u5c5e\u6027\u8bbe\u7f6e\u4e3a true\uff0c\u4ee5\u4fbf\u60a8\u53ef\u4ee5\u770b\u5230\u5404\u4e2a\u70b9\u3002<\/p>\n<p>\u5728 onFrame \u5904\u7406\u7a0b\u5e8f\u5185\uff0c\u6211\u4f7f\u7528 for \u5faa\u73af\u8fed\u4ee3\u6240\u6709\u6bb5\uff0c\u5e76\u5c06\u5b83\u4eec\u7684 x \u5750\u6807\u8bbe\u7f6e\u4e3a\u7b49\u4e8e\u57fa\u4e8e\u5176\u7d22\u5f15\u8ba1\u7b97\u7684\u503c\u3002\u5728 Math.sin() \u51fd\u6570\u5185\u4f7f\u7528 event.time \u51fd\u6570\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u4e0e\u6781\u503c\u76f8\u5173\u7684\u95ee\u9898\uff0c\u56e0\u4e3a Math.sin() \u7684\u503c\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u4e0e\u6781\u503c\u76f8\u5173\u7684\u95ee\u9898\u3002 sin() \u51fd\u6570\u5c06\u59cb\u7ec8\u4f4d\u4e8e -1 \u548c 1 \u4e4b\u95f4\u3002<\/p>\n<p>\u4ee5\u4e0b\u6f14\u793a\u663e\u793a\u4e86\u6211\u4eec\u7684\u52a8\u753b\u6b63\u65b9\u5f62\uff0c\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u5b83\u4e0d\u518d\u662f\u6b63\u65b9\u5f62\uff0c\u8fd9\u8981\u5f52\u529f\u4e8e\u6211\u4eec\u7684 onFrame \u5904\u7406\u7a0b\u5e8f\u4e2d\u7684\u4ee3\u7801\u3002\u6211\u5efa\u8bae\u60a8\u5c1d\u8bd5\u4e3a\u591a\u8fb9\u5f62\u6784\u9020\u51fd\u6570\u4ee5\u53ca sin \u51fd\u6570\u7684\u53c2\u6570\u5c1d\u8bd5\u4e0d\u540c\u7684\u503c\uff0c\u770b\u770b\u5b83\u4eec\u5982\u4f55\u5f71\u54cd\u6f14\u793a\u4e2d\u7684\u6700\u7ec8\u52a8\u753b\u3002\n<iframe src=\"%E2%80%9Chttps:\/\/codepen.io\/Shokeen\/full\/zqVKpM%E2%80%9D%E5%AE%BD%E5%BA%A6=%E2%80%9C850%E2%80%9D%E9%AB%98%E5%BA%A6=%E2%80%9C450%E2%80%9Dframeborder=%E2%80%9C0%E2%80%9D%E5%8A%A0%E8%BD%BD=%E2%80%9Clazy%E2%80%9D\"><\/iframe><\/p><h2>\u56fe\u50cf\u57fa\u7840\u77e5\u8bc6<\/h2>\n<p>Paper.js \u4e2d\u7684\u56fe\u50cf\u79f0\u4e3a\u6805\u683c\u3002\u60a8\u53ef\u4ee5\u50cf\u4efb\u4f55\u5176\u4ed6\u9879\u76ee\u4e00\u6837\u53d8\u6362\u548c\u79fb\u52a8\u5b83\u4eec\u3002\u8981\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u56fe\u50cf\uff0c\u60a8\u9996\u5148\u5fc5\u987b\u4f7f\u7528\u5e38\u7528\u7684 img \u6807\u7b7e\u5c06\u5176\u6dfb\u52a0\u5230\u7f51\u9875\u7684\u6807\u8bb0\u4e2d\uff0c\u5e76\u4e3a\u5176\u6307\u5b9a id\u3002\u8fd9\u4e2a id \u968f\u540e\u88ab\u4f20\u9012\u7ed9 new Raster(id) \u6784\u9020\u51fd\u6570\u3002<\/p>\n<p>\u8bf7\u8bb0\u4f4f\uff0c\u60a8\u6b63\u5728\u4f7f\u7528\u7684\u56fe\u50cf\u9700\u8981\u5df2\u52a0\u8f7d\uff0c\u5e76\u4e14\u5e94\u6258\u7ba1\u5728\u4e0e\u60a8\u7684\u9879\u76ee\u76f8\u540c\u7684\u7f51\u7ad9\u4e0a\u3002\u4f7f\u7528\u5176\u4ed6\u57df\u4e0a\u6258\u7ba1\u7684\u56fe\u50cf\u5c06\u5bfc\u81f4\u5b89\u5168\u9519\u8bef\u3002\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u64cd\u4f5c\u4ee5\u4e0b\u56fe\u50cf\uff1a<\/p>\n<p><img src=\"https:\/\/img.php.cn\/upload\/article\/000\/465\/014\/169370310676905.jpg\" alt=\"Paper.js\u5165\u95e8\u6307\u5357\uff1a\u52a8\u753b\u548c\u56fe\u50cf\"><\/p><p>\u8981\u8bbf\u95ee\u4e0a\u56fe\u4e2d\u5404\u4e2a\u50cf\u7d20\u7684\u989c\u8272\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 \u6805\u683c\u3002 getPixel(x, y) \u51fd\u6570\uff0c\u5176\u4e2d x \u548c y \u662f\u50cf\u7d20\u7684\u5750\u6807\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u751f\u6210 7*7 \u50cf\u7d20\u7684\u6b63\u65b9\u5f62\uff0c\u586b\u5145\u4f4d\u4e8e\u5de6\u4e0a\u89d2\u7684\u50cf\u7d20\u7684\u989c\u8272\uff1a<\/p>\n<pre class=\"brush:javascript;toolbal:false;\">var raster = new Raster('landscape');\nvar gridSize = 8;\nvar rectSize = 7;\n\nraster.on('load', function() {  \n  raster.size = new Size(80, 40);\n\n  for (var y = 0; y \n<p>\u52a0\u8f7d\u6805\u683c\u540e\uff0c\u6211\u4eec\u5c06\u5176\u5927\u5c0f\u8c03\u6574\u4e3a 80*40\u3002\u50cf\u7d20\u3002\u5728\u5d4c\u5957\u7684 for \u5faa\u73af\u5185\uff0c\u6211\u4eec\u904d\u5386\u8be5\u6805\u683c\u7684\u5404\u4e2a\u50cf\u7d20\u5e76\u521b\u5efa 7*7 \u7684\u6b63\u65b9\u5f62\u3002\u589e\u52a0\u6805\u683c\u7684\u5927\u5c0f\u4f1a\u7ed9\u6211\u4eec\u5e26\u6765\u66f4\u597d\u7684\u7ed3\u679c\uff0c\u4f46\u6267\u884c\u901f\u5ea6\u4f1a\u66f4\u6162\u3002\u8fd9\u662f\u6700\u7ec8\u7ed3\u679c\uff0c\u8c03\u6574\u540e\u7684\u5149\u6805\u5728\u5de6\u4e0a\u89d2\u53ef\u89c1\uff1a<\/p>\n<iframe src=\"%E2%80%9Chttps:\/\/codepen.io\/Shokeen\/full\/BKEvLR%E2%80%9D%E5%AE%BD%E5%BA%A6=%E2%80%9C850%E2%80%9D%E9%AB%98%E5%BA%A6=%E2%80%9C450%E2%80%9Dframeborder=%E2%80%9C0%E2%80%9D%E5%8A%A0%E8%BD%BD=%E2%80%9Clazy%E2%80%9D\"><\/iframe><p>\u5982\u679c\u8981\u9690\u85cf\u8c03\u6574\u5927\u5c0f\u540e\u7684\u6805\u683c\uff0c\u53ef\u4ee5\u5c06 raster.visible \u5c5e\u6027\u8bbe\u7f6e\u4e3a false\u3002\u60a8\u8fd8\u53ef\u4ee5\u64cd\u7eb5\u751f\u6210\u7684\u65b9\u5757\u7684\u989c\u8272\u3002\u4f8b\u5982\uff0c\u8981\u589e\u52a0\u6240\u6709\u65b9\u5757\u4e2d\u7684\u7ea2\u8272\u5206\u91cf\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u884c\uff1a<\/p>\n<pre class=\"brush:javascript;toolbal:false;\">path.fillColor = color + new Color(0.4,0,0);\n<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6700\u7ec8\u7ed3\u679c\u5c06\u662f\uff1a<\/p>\n
\u5149\u6805\u5316\u9879\u76ee<\/h2>\n
\u867d\u7136 Paper.js \u662f\u4e00\u4e2a\u77e2\u91cf\u56fe\u5f62\u5e93\uff0c\u4f46\u5b83\u8fd8\u5141\u8bb8\u60a8\u4ece\u73b0\u6709\u9879\u76ee\u521b\u5efa\u5149\u6805\u3002\u4e3a\u6b64\uff0c\u60a8\u5fc5\u987b\u4f7f\u7528 item.rasterize() \u65b9\u6cd5\u3002\u5149\u6805\u5316\u540e\uff0c\u539f\u59cb\u9879\u76ee\u672c\u8eab\u4e0d\u4f1a\u4ece\u9879\u76ee\u4e2d\u5220\u9664\u3002\u60a8\u8fd8\u53ef\u4ee5\u9009\u62e9\u6307\u5b9a\u5149\u6805\u7684\u5206\u8fa8\u7387\uff08\u4ee5\u6bcf\u82f1\u5bf8\u50cf\u7d20\u4e3a\u5355\u4f4d\uff09\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u4ee5\u4e0d\u540c\u7684\u5206\u8fa8\u7387\u4ece\u591a\u8fb9\u5f62\u521b\u5efa\u4e24\u4e2a\u6805\u683c\uff1a<\/p>\n
var aDodecagon = new Path.RegularPolygon(new Point(150, 180), 12, 30);\naDodecagon.fillColor = '#CCAAFC';\n  \nvar dodecRasterA = aDodecagon.rasterize();\ndodecRasterA.position.x += 250;\n  \nvar dodecRasterB = aDodecagon.rasterize(150);\ndodecRasterB.position.x += 500;\n  \naDodecagon.scale(3);\ndodecRasterA.scale(3);\ndodecRasterB.scale(3);\n<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0e\u4e2d\u95f4\u7684\u76f8\u6bd4\uff0c\u6700\u53f3\u8fb9\u7684\u5206\u8fa8\u7387\u66f4\u9ad8\u7684\u591a\u8fb9\u5f62\u4ecd\u7136\u5f88\u6e05\u6670\u3002\u6700\u7ec8\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
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