/// <summary>
/// 生成指定个数的随机数。
/// </summary>
/// <returns>生成的随机数数组。</returns>
private float[] GenerateRandom()
{
if (randomCount == 0)
{
return(null);
}
float[] randoms = new float[randomCount];
for (int i = 0; i < randomCount; i++)
{
randoms[i] = RandomExt.NextSingle();
}
return(randoms);
}
/// <summary>
/// 将拼图碎片在给定范围内随机分布。
/// </summary>
/// <param name="rect">碎片的分布矩形。</param>
/// <param name="rotatable">是否允许旋转拼图碎片。</param>
public void SpreadPieces(RectangleF rect, bool rotatable)
{
foreach (JigsawPiece p in this)
{
if (rotatable)
{
p.Rotate = RandomExt.Next(4) * 90;
}
RectangleF bounds = p.Bounds;
float x = RandomExt.NextSingle() * (rect.Width - bounds.Width) + rect.X - bounds.X + p.Offset.X;
float y = RandomExt.NextSingle() * (rect.Height - bounds.Height) + rect.Y - bounds.Y + p.Offset.Y;
p.Offset = new Vector2(x, y);
}
}