如何通过 svg 绘制线性渐变圆? [英] How to draw a linear gradient circle by svg?

问题描述

这是我的代码，但不是我想要的.希望颜色分布不对称.

This is my code, but it's not what I wanted.I hope the color distribution is not symmetrical.

<svg width="300" height="300">
    <linearGradient id="linearColors" x1="0" y1="0" x2="1" y2="1">
       <stop offset="5%" stop-color="#01E400"></stop>
       <stop offset="25%" stop-color="#FEFF01"></stop>
       <stop offset="40%" stop-color="#FF7E00"></stop>
       <stop offset="60%" stop-color="#FB0300"></stop>
       <stop offset="80%" stop-color="#9B004A"></stop>
       <stop offset="100%" stop-color="#7D0022"></stop>
    </linearGradient>
   <circle r="120" cx="150" cy="150" class="external-circle" stroke-width="4" fill="none" stroke="url(#linearColors)"></circle>
</svg>

我需要这样的效果.

推荐答案

检查前:circle-drawing-with-svgs-arc-路径 ....我的解决方案很简单:我将圆分成六个圆弧，每个圆弧都有自己的线性渐变

before check: circle-drawing-with-svgs-arc-path .... my solution is simple: i divided circle into six arcs, each arc with own lineal gradient

数学解释:

角度 = 360/6 = 60

angle = 360 / 6 = 60

Math.sin(Math.PI*60/180)*120 == 103.9230

Math.sin(Math.PI*60/180)*120 == 103.9230

Math.cos(Math.PI*60/180)*120 == 60.0000

Math.cos(Math.PI*60/180)*120 == 60.0000

<svg width="300" height="300">
    <linearGradient id="linearColors1" x1="0" y1="0" x2="1" y2="1">
       <stop offset="0%" stop-color="#01E400"></stop>
       <stop offset="100%" stop-color="#FEFF01"></stop>
    </linearGradient>
    <linearGradient id="linearColors2" x1="0.5" y1="0" x2="0.5" y2="1">
       <stop offset="0%" stop-color="#FEFF01"></stop>
       <stop offset="100%" stop-color="#FF7E00"></stop>
    </linearGradient>
    <linearGradient id="linearColors3" x1="1" y1="0" x2="0" y2="1">
       <stop offset="0%" stop-color="#FF7E00"></stop>
       <stop offset="100%" stop-color="#FB0300"></stop>
    </linearGradient>
    <linearGradient id="linearColors4" x1="1" y1="1" x2="0" y2="0">
       <stop offset="0%" stop-color="#FB0300"></stop>
       <stop offset="100%" stop-color="#9B004A"></stop>
    </linearGradient>
    <linearGradient id="linearColors5" x1="0.5" y1="1" x2="0.5" y2="0">
       <stop offset="0%" stop-color="#9B004A"></stop>
       <stop offset="100%" stop-color="#7D0022"></stop>
    </linearGradient>
    <linearGradient id="linearColors6" x1="0" y1="1" x2="1" y2="0">
       <stop offset="0%" stop-color="#7D0022"></stop>
       <stop offset="100%" stop-color="#01E400"></stop>
    </linearGradient>
   <path d="M150 10 a120 120 0 0 1 103.9230 60"
        fill="none" stroke="url(#linearColors1)" stroke-width="5" />
  <path d="M253.9230 70 a120 120 0 0 1 0 120"
        fill="none" stroke="url(#linearColors2)" stroke-width="5" />
  <path d="M253.9230 190 a120 120 0 0 1 -103.9230 60"
        fill="none" stroke="url(#linearColors3)" stroke-width="5" />
  <path d="M150 250 a120 120 0 0 1 -103.9230 -60"
        fill="none" stroke="url(#linearColors4)" stroke-width="5" />
  <path d="M46.077 190 a120 120 0 0 1 0 -120"
        fill="none" stroke="url(#linearColors5)" stroke-width="5" />
  <path d="M46.077 70 a120 120 0 0 1 103.9230 -60"
        fill="none" stroke="url(#linearColors6)" stroke-width="5" />
</svg>

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