/// <summary>
/// 将指定的拼图碎片与当前的拼图碎片合并。不检查两个拼图碎片是否可以被合并。
/// </summary>
/// <param name="piece">要合并的拼图碎片。</param>
public void Merge(JigsawPiece piece)
{
// 更新相邻拼图碎片信息。
foreach (JigsawPiece p in piece.neighbors)
{
p.neighbors.Remove(piece);
p.neighbors.Add(this);
}
this.neighbors.UnionWith(piece.neighbors);
this.neighbors.Remove(this);
// 更新形状。
float sum = this.shape.Weight + piece.shape.Weight;
this.offset = new Vector2((this.offset.X * this.shape.Weight + piece.offset.X * piece.shape.Weight) / sum,
(offset.Y * this.shape.Weight + piece.offset.Y * piece.shape.Weight) / sum);
this.shape.Merge(piece.shape);
// 更新路径。
GeometryGroup newGroup = SharpDXUtility.Merge(this.originalPath, piece.originalPath);
this.originalPath.Dispose();
this.originalPath = newGroup;
this.CalculateMatrix();
this.UpdatePath();
if (piece.PieceType == JigsawPieceType.Border)
{
this.pieceType = JigsawPieceType.Border;
}
piece.Dispose();
}
/// <summary>
/// 生成拼图形状。
/// </summary>
public void GererateJigsawShape()
{
// 拼图尺寸。
float width = Size.Width;
float height = Size.Height;
// 拼图碎片的尺寸。
float pWidth = width / horizontalDimension;
float pHeight = height / verticalDimension;
// 拼图碎片的随机化尺寸。
float rWidth = pWidth * randomization / 3;
float rHeight = pHeight * randomization / 3;
float x, y;
// 最后一行节点。
Vector2[] corners = new Vector2[horizontalDimension + 1];
Vector2 lastPoint = new Vector2();
// 最后一行的边凹凸性。
bool[] borders = new bool[horizontalDimension + 1];
bool lastBorder = false;
// 最后一行的随机数。
float[][] values = new float[horizontalDimension + 1][];
float[] lastValue = null;
for (int i = 0; i <= this.verticalDimension; i++)
{
for (int j = 0; j <= this.horizontalDimension; j++)
{
y = pHeight * i;
if (i > 0 && i < this.verticalDimension && rHeight != 0f)
{
y += (float)((RandomExt.NextDouble() * 2 - 1) * rHeight);
}
x = pWidth * j;
if (j > 0 && j < horizontalDimension && rWidth != 0f)
{
x += (float)((RandomExt.NextDouble() * 2 - 1) * rWidth);
}
Vector2 currentPoint = new Vector2(x, y);
if (i == 0)
{
corners[j] = currentPoint;
}
else if (j == 0)
{
lastPoint = currentPoint;
}
else
{
// 将拼图碎片放置在国际象棋盘上，每片会分别对应黑色和白色。
bool isBlack = (i + j) % 2 == 0;
Path path = new Path(corners[j], isBlack);
// 逆时针添加边。
// 顶边。
if (i == 1)
{
path.AddLine(corners[j - 1]);
}
else
{
AddBorder(path, corners[j], corners[j - 1], !borders[j], values[j]);
}
// 左边。
if (j == 1)
{
path.AddLine(lastPoint);
}
else
{
AddBorder(path, corners[j - 1], lastPoint, !lastBorder, lastValue);
}
// 底边。
if (i == verticalDimension)
{
path.AddLine(currentPoint);
}
else
{
borders[j] = RandomExt.NextBoolean();
values[j] = GenerateRandom();
AddBorder(path, lastPoint, currentPoint, borders[j], values[j]);
}
// 右边。
if (j == horizontalDimension)
{
path.AddLine(corners[j]);
}
else
{
lastBorder = RandomExt.NextBoolean();
lastValue = GenerateRandom();
AddBorder(path, currentPoint, corners[j], lastBorder, lastValue);
}
this.paths.Add(path);
// 计算形状的重心。
Vector2 c1 = SharpDXUtility.GetCenter(corners[j - 1], corners[j], lastPoint);
Vector2 c2 = SharpDXUtility.GetCenter(corners[j], lastPoint, currentPoint);
float w1 = SharpDXUtility.Area(corners[j - 1], corners[j], lastPoint);
float w2 = SharpDXUtility.Area(corners[j], lastPoint, currentPoint);
path.Weight = w1 + w2;
path.Center = new Vector2((c1.X * w1 + c2.X * w2) / path.Weight, (c1.Y * w1 + c2.Y * w2) / path.Weight);
corners[j - 1] = lastPoint;
lastPoint = currentPoint;
if (j == this.horizontalDimension)
{
corners[j] = currentPoint;
}
}
}
}
}
