将 hatch 原点移动靠近 hatch 边界以提高性能

如何将 hatch 原点移动靠近 hatch 边界以提高性能

问题： 如何将 hatch 原点移动靠近 hatch 边界以提高性能 (CADNET-1340)。

提示： 要做到这一点，从图纸中获取 CadHatch 实体，使用 Point2D 设置所需的点，计算距离，并在 CadHatchPatternData 中为 X 和 Y 设置 LineBasePoint。

示例：

foreach (CadBaseEntity entity in cadImage.Entities)
{
    if (entity.TypeName == CadEntityTypeName.HATCH)
    {
        CadHatch hatch = (CadHatch)entity;

        if (hatch.PatternDefinitions.Count > 0)
        {
            Point2D firstPoint = new Point2D(hatch.PatternDefinitions[0].LineBasePoint.X, hatch.PatternDefinitions[0].LineBasePoint.Y);

            if (hatch.BoundaryPaths[0].BoundaryPath[0].GetType() == typeof(CadPolylineBoundaryPath))
            {
                CadPolylineBoundaryPath polyline = (CadPolylineBoundaryPath)(hatch.BoundaryPaths[0].BoundaryPath[0]);
                firstPoint = polyline.Vertices[0];
            }
            else
            {
                CadEdgeBoundaryPath edgePath = (CadEdgeBoundaryPath)(hatch.BoundaryPaths[0].BoundaryPath[0]);

                if (edgePath.Objects[0].GetType() == typeof(CadBoundaryPathLine))
                {
                    CadBoundaryPathLine line = (CadBoundaryPathLine)edgePath.Objects[0];
                    firstPoint = line.FirstPoint;
                }

                if (edgePath.Objects[0].GetType() == typeof(CadBoundaryPathCircularArc))
                {
                    // TODO
                }

                if (edgePath.Objects[0].GetType() == typeof(CadBoundaryPathCircularEllipse))
                {
                    // TODO
                }

                if (edgePath.Objects[0].GetType() == typeof(CadBoundaryPathSpline))
                {
                    // TODO
                }
            }


            bool requiresShift = false;
            double distanceX = 0, distanceY = 0;

            if (Math.Abs(hatch.PatternDefinitions[0].LineBasePoint.X - firstPoint.X) > 20000
                || Math.Abs(hatch.PatternDefinitions[0].LineBasePoint.Y - firstPoint.Y) > 20000)
            {
                requiresShift = true;
                distanceX = hatch.PatternDefinitions[0].LineBasePoint.X - firstPoint.X;
                distanceY = hatch.PatternDefinitions[0].LineBasePoint.Y - firstPoint.Y;
            }

            if (requiresShift)
            {
                foreach (CadHatchPatternData d in hatch.PatternDefinitions)
                {
                    d.LineBasePoint.X -= distanceX;
                    d.LineBasePoint.Y -= distanceY;
                }
            }
        }
    }
}