/// <summary>
/// 通过一组规范化的距离/方向角来构造形状上下文
/// </summary>
/// <param name="vectors">Vector2的X为规范化到[0,1]的距离参数，Y为[0,2pi]的方向角参数。</param>
public ShapeContext(Vector2[] vectors)
{
Histogram = new LogPolar2Histogram(vectors);
}
/// <summary>
/// 通过一组规范化的距离/方向角来构造形状上下文
/// </summary>
/// <param name="vectors">Vector2的X为规范化到[0,1]的距离参数，Y为[0,2pi]的方向角参数。</param>
public ShapeContext(Vector2[] vectors)
{
Histogram = new LogPolar2Histogram(vectors);
}
