/// <summary>
/// 获取矩形属性
/// </summary>
public static RectangleData GetRectangleData(this Database db, ObjectId id)
{
RectangleData data = new RectangleData();
if (db.IsRectangle(id))
{
PLineData plinedata = db.GetPLineData(id);
for (int i = 0; i < 4; i++)
{
Vector3d vec1 = plinedata.Vectors[i];
Vector3d vec2 = plinedata.Vectors[(i + 1) % 4];
if (vec1 == new Vector3d(1, 0, 0) && vec2 == new Vector3d(0, 1, 0))
{
data.IsClockWise = false;
data.BasePointIndex = i;
data.BasePoint = plinedata.VertexPoints[i];
}
else if (vec1 == new Vector3d(0, 1, 0) && vec2 == new Vector3d(1, 0, 0))
{
data.IsClockWise = true;
data.BasePointIndex = i;
data.BasePoint = plinedata.VertexPoints[i];
}
}
Point3d p0 = plinedata.VertexPoints[0];
Point3d p2 = plinedata.VertexPoints[2];
data.Width = Math.Abs(p2.X - p0.X);
data.Height = Math.Abs(p2.Y - p0.Y);
}
return(data);
}
/// <summary>
/// 修改矩形宽度
/// </summary>
public static void SetRectangleWidth(this Database db, ObjectId id, double newWidth)
{
if (db.IsRectangle(id))
{
RectangleData data = db.GetRectangleData(id);
int baseIndex = data.BasePointIndex;
Point3d basePoint = data.BasePoint;
bool clockWise = data.IsClockWise;
double width = data.Width;
double height = data.Height;
using (Transaction trans = db.TransactionManager.StartTransaction())
{
// 打开块表
BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
// 打开块表记录
BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead);
// 获取图形对象
Entity ent = trans.GetObject(id, OpenMode.ForWrite) as Entity;
if (ent.GetType() == typeof(Polyline))
{
Polyline pline = ent as Polyline;
btr.UpgradeOpen();
pline.SetPointAt(baseIndex, new Point2d(basePoint.X - newWidth / 2, basePoint.Y));
if (clockWise)
{
pline.SetPointAt((baseIndex + 1) % 4, new Point2d(basePoint.X - newWidth / 2, basePoint.Y + height));
pline.SetPointAt((baseIndex + 2) % 4, new Point2d(basePoint.X + width + newWidth / 2, basePoint.Y + height));
pline.SetPointAt((baseIndex + 3) % 4, new Point2d(basePoint.X + width + newWidth / 2, basePoint.Y));
}
else
{
pline.SetPointAt((baseIndex + 1) % 4, new Point2d(basePoint.X + width + newWidth / 2, basePoint.Y));
pline.SetPointAt((baseIndex + 2) % 4, new Point2d(basePoint.X + width + newWidth / 2, basePoint.Y + height));
pline.SetPointAt((baseIndex + 3) % 4, new Point2d(basePoint.X - newWidth / 2, basePoint.Y + height));
}
btr.DowngradeOpen();
}
trans.Commit();
}
}
}