circleToRect method

bool circleToRect(DFRect other)

圆形和矩形重叠

Implementation

bool circleToRect(DFRect other) {
  /// 矩形不重叠，不用判断圆形了
  if (!toRect().overlaps(other)) {
    return false;
  }

  /// 排除矩形包含了圆形
  if (other.right >= this.center.x + this.radius &&
      other.left <= this.center.x - this.radius &&
      other.top <= this.center.y - this.radius &&
      other.bottom >= this.center.y + this.radius) {
    return true;
  }

  /// 顶点
  final points = [
    DFPosition(other.left, other.top),
    DFPosition(other.right, other.top),
    DFPosition(other.right, other.bottom),
    DFPosition(other.left, other.bottom),
    DFPosition(other.left, other.top),
  ];

  /// print(other.toString());
  for (var i = 0; i < points.length - 1; i++) {
    final distance = DFUtil.getNearestDistance(points[i], points[i + 1], this.center);

    /// print((distance).toString());
    if (DFUtil.fixDouble4(distance) <= this.radius) {
      return true;
    }
  }
  return false;
}