我如何创建一个这样的形状显示在网页上?
我不想使用图像，因为它们在缩放时会变得模糊
我尝试用CSS:
.tear { 显示:inline-block; 变换:旋转(-30度); 边框:5px纯绿色; 宽度:50 px; 身高:100 px; border-top-left-radius: 50%; border-bottom-left-radius: 50%; border-bottom-right-radius: 50%; ｝ < div class = "扯" > < / div >
结果真是搞砸了。
然后我尝试用SVG:
<svg viewBox="0 100 100"> <多边形点="50,0 100,70 50,100 0,70"/> < / svg >
它确实有了形状，但底部没有弯曲。
有没有一种方法来创建这个形状，以便它可以在HTML页面中使用?
当前回答
我还在用户Ana Tudor使用CSS和盒影风格和参数方程制作的Codepen上发现了这一点。非常简单，代码非常少。许多浏览器都支持CSS3框影样式:
body { background-color: black; } .tear { position: absolute; top: 50%; left: 50%; margin: -0.125em; width: 0.25em; height: 0.25em; border-radius: 50%; box-shadow: 0em -5em red, 0.00118em -4.97592em #ff1800, 0.00937em -4.90393em #ff3000, 0.03125em -4.7847em #ff4800, 0.07283em -4.6194em #ff6000, 0.13915em -4.40961em #ff7800, 0.23408em -4.15735em #ff8f00, 0.36em -3.86505em #ffa700, 0.51777em -3.53553em #ffbf00, 0.70654em -3.17197em gold, 0.92382em -2.77785em #ffef00, 1.16547em -2.35698em #f7ff00, 1.42582em -1.91342em #dfff00, 1.69789em -1.45142em #c7ff00, 1.97361em -0.97545em #afff00, 2.2441em -0.49009em #97ff00, 2.5em 0.0em #80ff00, 2.73182em 0.49009em #68ff00, 2.93032em 0.97545em #50ff00, 3.08681em 1.45142em #38ff00, 3.19358em 1.91342em #20ff00, 3.24414em 2.35698em #08ff00, 3.23352em 2.77785em #00ff10, 3.15851em 3.17197em #00ff28, 3.01777em 3.53553em #00ff40, 2.81196em 3.86505em #00ff58, 2.54377em 4.15735em #00ff70, 2.21783em 4.40961em #00ff87, 1.84059em 4.6194em #00ff9f, 1.42017em 4.7847em #00ffb7, 0.96608em 4.90393em #00ffcf, 0.48891em 4.97592em #00ffe7, 0.0em 5em cyan, -0.48891em 4.97592em #00e7ff, -0.96608em 4.90393em #00cfff, -1.42017em 4.7847em #00b7ff, -1.84059em 4.6194em #009fff, -2.21783em 4.40961em #0087ff, -2.54377em 4.15735em #0070ff, -2.81196em 3.86505em #0058ff, -3.01777em 3.53553em #0040ff, -3.15851em 3.17197em #0028ff, -3.23352em 2.77785em #0010ff, -3.24414em 2.35698em #0800ff, -3.19358em 1.91342em #2000ff, -3.08681em 1.45142em #3800ff, -2.93032em 0.97545em #5000ff, -2.73182em 0.49009em #6800ff, -2.5em 0.0em #7f00ff, -2.2441em -0.49009em #9700ff, -1.97361em -0.97545em #af00ff, -1.69789em -1.45142em #c700ff, -1.42582em -1.91342em #df00ff, -1.16547em -2.35698em #f700ff, -0.92382em -2.77785em #ff00ef, -0.70654em -3.17197em #ff00d7, -0.51777em -3.53553em #ff00bf, -0.36em -3.86505em #ff00a7, -0.23408em -4.15735em #ff008f, -0.13915em -4.40961em #ff0078, -0.07283em -4.6194em #ff0060, -0.03125em -4.7847em #ff0048, -0.00937em -4.90393em #ff0030, -0.00118em -4.97592em #ff0018; } <div class="tear"></div>
其他回答
我还在用户Ana Tudor使用CSS和盒影风格和参数方程制作的Codepen上发现了这一点。非常简单，代码非常少。许多浏览器都支持CSS3框影样式:
body { background-color: black; } .tear { position: absolute; top: 50%; left: 50%; margin: -0.125em; width: 0.25em; height: 0.25em; border-radius: 50%; box-shadow: 0em -5em red, 0.00118em -4.97592em #ff1800, 0.00937em -4.90393em #ff3000, 0.03125em -4.7847em #ff4800, 0.07283em -4.6194em #ff6000, 0.13915em -4.40961em #ff7800, 0.23408em -4.15735em #ff8f00, 0.36em -3.86505em #ffa700, 0.51777em -3.53553em #ffbf00, 0.70654em -3.17197em gold, 0.92382em -2.77785em #ffef00, 1.16547em -2.35698em #f7ff00, 1.42582em -1.91342em #dfff00, 1.69789em -1.45142em #c7ff00, 1.97361em -0.97545em #afff00, 2.2441em -0.49009em #97ff00, 2.5em 0.0em #80ff00, 2.73182em 0.49009em #68ff00, 2.93032em 0.97545em #50ff00, 3.08681em 1.45142em #38ff00, 3.19358em 1.91342em #20ff00, 3.24414em 2.35698em #08ff00, 3.23352em 2.77785em #00ff10, 3.15851em 3.17197em #00ff28, 3.01777em 3.53553em #00ff40, 2.81196em 3.86505em #00ff58, 2.54377em 4.15735em #00ff70, 2.21783em 4.40961em #00ff87, 1.84059em 4.6194em #00ff9f, 1.42017em 4.7847em #00ffb7, 0.96608em 4.90393em #00ffcf, 0.48891em 4.97592em #00ffe7, 0.0em 5em cyan, -0.48891em 4.97592em #00e7ff, -0.96608em 4.90393em #00cfff, -1.42017em 4.7847em #00b7ff, -1.84059em 4.6194em #009fff, -2.21783em 4.40961em #0087ff, -2.54377em 4.15735em #0070ff, -2.81196em 3.86505em #0058ff, -3.01777em 3.53553em #0040ff, -3.15851em 3.17197em #0028ff, -3.23352em 2.77785em #0010ff, -3.24414em 2.35698em #0800ff, -3.19358em 1.91342em #2000ff, -3.08681em 1.45142em #3800ff, -2.93032em 0.97545em #5000ff, -2.73182em 0.49009em #6800ff, -2.5em 0.0em #7f00ff, -2.2441em -0.49009em #9700ff, -1.97361em -0.97545em #af00ff, -1.69789em -1.45142em #c700ff, -1.42582em -1.91342em #df00ff, -1.16547em -2.35698em #f700ff, -0.92382em -2.77785em #ff00ef, -0.70654em -3.17197em #ff00d7, -0.51777em -3.53553em #ff00bf, -0.36em -3.86505em #ff00a7, -0.23408em -4.15735em #ff008f, -0.13915em -4.40961em #ff0078, -0.07283em -4.6194em #ff0060, -0.03125em -4.7847em #ff0048, -0.00937em -4.90393em #ff0030, -0.00118em -4.97592em #ff0018; } <div class="tear"></div>
使用SVG很容易做到这一点，只需使用一个图像转换资源，如http://image.online-convert.com/convert-to-svg，它被用来创建以下内容:
<?xml version="1.0" standalone="no"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd"> <svg version="1.0" xmlns="http://www.w3.org/2000/svg" width="213.000000pt" height="300.000000pt" viewBox="0 0 213.000000 300.000000" preserveAspectRatio="xMidYMid meet"> <metadata> Created by potrace 1.12, written by Peter Selinger 2001-2015 </metadata> <g transform="translate(0.000000,300.000000) scale(0.100000,-0.100000)" fill="#000000" stroke="none"> <path d="M1035 2944 c-143 -250 -231 -380 -508 -752 -347 -465 -432 -616 -493 -882 -91 -394 10 -753 285 -1013 508 -479 1334 -361 1677 240 126 221 165 494 105 726 -66 254 -178 452 -609 1076 -96 140 -226 335 -288 435 -155 249 -135 229 -169 170z m85 -212 c40 -69 192 -298 543 -818 268 -396 354 -593 364 -835 12 -281 -82 -509 -296 -714 -103 -99 -236 -173 -396 -221 -82 -25 -105 -27 -260 -28 -148 -1 -181 2 -255 22 -348 96 -611 357 -691 689 -41 167 -25 392 41 587 62 185 154 334 444 716 177 235 320 444 402 592 27 49 51 88 54 88 3 0 25 -35 50 -78z"/> </g> </svg>
在我看来，这种形状需要光滑的曲线，以确保曲线的连续性。
问题中的Drop:
对于刚才提到的下落，
平滑曲线不能被使用，因为控制点不会有相同的长度。但我们仍然需要使控制点与之前的控制点完全相反(180度)，以确保曲线的完全连续性。下图说明了这一点:
注:红色曲线和蓝色曲线是两条不同的二次曲线。
Stroke-linejoin ="斜接"，用于尖顶部分。 由于这个形状只使用连续的c命令，我们可以省略它。
这是最后一个片段:
<svg height="300px" width="300px" viewBox="0 0 12 16"> <path fill="#FFF" stroke="black" stroke-width="0.5" stroke-linejoin="miter" d="M 6 1 c -2 3 -5 5 -5 9 . 0 7 10 7 10 0 0 -4 -3 -6 -5 -9z" /> < / svg >
不过说实话，公认答案的曲线并不完全连续。
用于IE 5-8 (VML)
只能在IE 5-8下运行。VML使用的命令与SVG不同。如。它用v表示相对三次贝塞尔。
注意:这段代码也不能在IE 5-8中运行。您需要创建一个html文件，并直接在浏览器中运行它。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<style> v\:* { behavior: url(#default#VML); }
</style >
</head>
<body>
<div style="width:240; height:320;">
<v:shape coordorigin="0 0" coordsize="12 16" fillcolor="white" strokecolor="black" strokewidth="1"
strokeweight="5" style="width:240; height:320"
path="M 6 1 v -2 3 -5 5 -5 9
0 7 10 7 10 0
0 -4 -3 -6 -5 -9 x e">
</v:shape>
</div>
</body>
</html>
下面是四个逐步简化的SVG泪滴形状:
<svg viewbox="-20 -20 180 180"> <g stroke="black" fill="none"> <path transform="translate(0)" d="M 0 0 C 0 10 10 17 10 27 C 10 40 -10 40 -10 27 C -10 17 0 10 0 0 Z"/> <path transform="translate(40)" d="M 0 0 C 0 16 15 25 5 34 Q 0 38 -5 34 C -15 25 0 16 0 0 Z"/> <path transform="translate(80)" d="M 0 0 C 0 10 18 36 0 36 S 0 10 0 0 Z"/> <path transform="translate(120)" d="M 0 0 Q 18 36 0 36 T 0 0 Z"/> <g stroke-width="0.25" stroke="red"> <g transform="translate(0)"> <ellipse rx="1" ry="1" cx="0" cy="0" /> <ellipse rx="1" ry="1" cx="0" cy="10"/> <ellipse rx="1" ry="1" cx="10" cy="17"/> <ellipse rx="1" ry="1" cx="10" cy="27"/> <ellipse rx="1" ry="1" cx="10" cy="40"/> <ellipse rx="1" ry="1" cx="-10" cy="40"/> <ellipse rx="1" ry="1" cx="-10" cy="27"/> <ellipse rx="1" ry="1" cx="-10" cy="17"/> <line x1="0" y1="0" x2="0" y2="10"/> <line x1="10" y1="17" x2="10" y2="40"/> <line x1="-10" y1="40" x2="-10" y2="17"/> </g> <g transform="translate(40)"> <ellipse rx="1" ry="1" cx="0" cy="0" /> <ellipse rx="1" ry="1" cx="0" cy="16"/> <ellipse rx="1" ry="1" cx="15" cy="25"/> <ellipse rx="1" ry="1" cx="5" cy="34"/> <ellipse rx="1" ry="1" cx="0" cy="38"/> <ellipse rx="1" ry="1" cx="-5" cy="34"/> <ellipse rx="1" ry="1" cx="-15" cy="25"/> <line x1="0" y1="0" x2="0" y2="16"/> <line x1="15" y1="25" x2="0" y2="38"/> <line x1="0" y1="38" x2="-15" y2="25"/> </g> <g transform="translate(80)"> <ellipse rx="1" ry="1" cx="0" cy="0" /> <ellipse rx="1" ry="1" cx="0" cy="10"/> <ellipse rx="1" ry="1" cx="18" cy="36"/> <ellipse rx="1" ry="1" cx="0" cy="36"/> <ellipse rx="1" ry="1" cx="-18" cy="36" stroke="gray"/> <line x1="0" y1="0" x2="0" y2="10"/> <line x1="18" y1="36" x2="0" y2="36"/> <line x1="0" y1="36" x2="-18" y2="36" stroke="gray" stroke-dasharray="0.5"/> </g> <g transform="translate(120)"> <ellipse rx="1" ry="1" cx="0" cy="0" /> <ellipse rx="1" ry="1" cx="18" cy="36"/> <ellipse rx="1" ry="1" cx="0" cy="36"/> <ellipse rx="1" ry="1" cx="-18" cy="36" stroke="gray"/> <line x1="18" y1="36" x2="0" y2="36"/> <line x1="0" y1="36" x2="-18" y2="36" stroke="gray" stroke-dasharray="0.5"/> </g> </g> </g> <g font-size="6" transform="translate(-1.5,-4)"> <text x="-10" y="-8"># of unique points:</text> <text transform="translate( 0)">8</text> <text transform="translate( 40)">7</text> <text transform="translate( 80)">4</text> <text transform="translate(120)">3</text> </g> </svg>
我个人会使用SVG。您可以在大多数矢量图形软件中创建svg。我建议:
之 草图 Adobe Illustrator
我在下面做了一个，这是在Illustrator中绘制你的形状。
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="223.14px" height="319.008px" viewBox="0 0 223.14 319.008" enable-background="new 0 0 223.14 319.008" xml:space="preserve"> <path fill="none" stroke="#000000" stroke-width="12" stroke-miterlimit="10" d="M111.57,13.291c0,0,57.179,86.984,72.719,108.819 c30.359,42.66,41.005,114.694,1.626,154.074c-20.464,20.463-47.533,30.293-74.344,29.488h-0.002 c-26.811,0.805-53.88-9.025-74.344-29.488C-2.154,236.804,8.492,164.77,38.851,122.11C54.391,100.275,111.57,13.291,111.57,13.291z" /> </svg>
