drawRadarPath method
绘制边框
Implementation
drawRadarPath(Canvas canvas, List<double> value, List<double> maxList, Paint linePaint) {
Path mradarPath = Path();
double step = radarMap.radius / value.length; //每小段的长度
mradarPath.moveTo(0, -value[0] / (maxList[0] / value.length) * step);
for (int i = 1; i < value.length; i++) {
double mark = value[i] / (maxList[i] / value.length);
var deg = pi / 180 * (360 / value.length * i - 90);
mradarPath.lineTo(mark * step * cos(deg), mark * step * sin(deg));
}
mradarPath.close();
canvas.drawPath(mradarPath, linePaint);
}