| public TransformPoint ( Point point ) : Point | ||
| point | Point | |
| Результат | Point | |
/// <summary>
/// Calculates the bounding rectangle of subsequent vertices after being transformed by a matrix.
/// </summary>
public Rectangle BoundsAfterTransformation(Matrix matrix, int atIndex, int numVertices)
{
if (atIndex < 0 || atIndex + numVertices > _numVertices)
{
throw new IndexOutOfRangeException("Invalid vertex index");
}
if (numVertices == 0)
return null;
float minX = float.MaxValue;
float maxX = float.MinValue;
float minY = float.MaxValue;
float maxY = float.MinValue;
int endIndex = atIndex + numVertices;
if (matrix != null)
{
for (int i = atIndex; i < endIndex; ++i)
{
Vector2 position = _vertices[i].Position;
Point transformedPoint = matrix.TransformPoint(position.X, position.Y);
float tfX = transformedPoint.X;
float tfY = transformedPoint.Y;
minX = Math.Min(minX, tfX);
maxX = Math.Max(maxX, tfX);
minY = Math.Min(minY, tfY);
maxY = Math.Max(maxY, tfY);
}
}
else
{
for (int i = atIndex; i < endIndex; ++i)
{
Vector2 position = _vertices[i].Position;
minX = Math.Min(minX, position.X);
maxX = Math.Max(maxX, position.X);
minY = Math.Min(minY, position.Y);
maxY = Math.Max(maxY, position.Y);
}
}
return new Rectangle(minX, minY, maxX - minX, maxY - minY);
}
