vue实现几何线条流动的效果

实现几何线条流动效果，可以在线条的绘制中加入一些特殊的计算方式，使线条绘制的轨迹变得更加复杂和有规律。下面是一个基于Vue的几何线条流动效果的实现方法：

<template>
  <canvas ref="canvas"></canvas>
</template>

<script>
export default {
  data() {
    return {
      points: [],
      color: 'rgba(255, 255, 255, 0.8)',
      lineWidth: 1,
      maxDistance: 100,
      lineDistance: 30,
      speed: 0.05
    };
  },
  mounted() {
    this.canvas = this.$refs.canvas;
    this.context = this.canvas.getContext('2d');

    this.initPoints();
    this.interval = setInterval(this.draw, 30);
  },
  beforeDestroy() {
    clearInterval(this.interval);
  },
  methods: {
    initPoints() {
      const { width, height } = this.canvas;
      const rows = Math.floor(height / this.lineDistance) + 1;
      const cols = Math.floor(width / this.lineDistance) + 1;
      for (let r = 0; r < rows; r++) {
        for (let c = 0; c < cols; c++) {
          const x = c * this.lineDistance;
          const y = r * this.lineDistance;
          const angle = Math.random() * Math.PI * 2;
          const distance = Math.random() * this.maxDistance;
          this.points.push({ x, y, angle, distance });
        }
      }
    },
    draw() {
      const { width, height } = this.canvas;
      this.context.clearRect(0, 0, width, height);
      this.context.save();
      this.context.lineWidth = this.lineWidth;
      this.context.strokeStyle = this.color;
      for (const point of this.points) {
        point.angle += this.speed;
        const x = point.x + Math.cos(point.angle) * point.distance;
        const y = point.y + Math.sin(point.angle) * point.distance;
        if (x >= 0 && x <= width && y >= 0 && y <= height) {
          this.context.beginPath();
          this.context.moveTo(point.x, point.y);
          this.context.lineTo(x, y);
          this.context.stroke();
        } else {
          point.angle = Math.random() * Math.PI * 2;
          point.distance = Math.random() * this.maxDistance;
        }
      }
      this.context.restore();
    }
  }
};
</script>

这段代码会在画布上绘制一些随机的点，每个点会随机生成一个角度和一个距离。在绘制时，每个点的角度会不断增加，通过计算得到一个新的位置，并在原位置和新位置之间绘制一条线条。如果新位置超出了画布的范围，则重新生成一个随机的角度和距离。通过调整`maxDistance`、`lineDistance`和`speed`等参数，可以生成不同形状和运动规律的几何线条流动效果。