java 任意形状_用任意形状的笔画

我在WPF中解决了这个问题 . 我想要一个可以用曲线和孔做复杂形状的解决方案 . 我得到的最接近的是在原始形状上使用GetFlattenedPathGeometry，它将曲线转换为线段，然后运行上述方法 . 这是一个冗余的计算，但结合平行四边形，然后在起点和终点“压印”原始形状导致最终几何中的几何形状相对较少 .

public Geometry translateGeo(Geometry baseGeo, Point translate)

{

// sweeps a geometry linearly from current location through vector

Debug.WriteLine("Translating Geometry");

Debug.WriteLine("Original Outline Verticies: " + CountVerticies(baseGeo.GetFlattenedPathGeometry()));

Geometry sweptPathGeo = baseGeo.Clone();

Geometry capGeo = baseGeo.Clone();

capGeo.Transform = new TranslateTransform(translate.X, translate.Y);

sweptPathGeo = new CombinedGeometry(GeometryCombineMode.Union, sweptPathGeo, capGeo);

sweptPathGeo = sweptPathGeo.GetFlattenedPathGeometry();

geometry = sweptPathGeo.Clone();

PathGeometry pathGeo = baseGeo.GetFlattenedPathGeometry();

foreach (PathFigure figure in pathGeo.Figures)

{

Point startPoint = figure.StartPoint;

//Debug.WriteLine(startPoint.X + ", " + startPoint.Y);

foreach (PathSegment segment in figure.Segments)

{

PolyLineSegment polySegment = segment as PolyLineSegment;

if (polySegment != null)

{

foreach (Point point in polySegment.Points)

{

sweptPathGeo = new CombinedGeometry(GeometryCombineMode.Union, sweptPathGeo, getShadow(startPoint, point, translate));

startPoint = point;

}

}

LineSegment lineSegment = segment as LineSegment;

if (lineSegment != null)

{

sweptPathGeo = new CombinedGeometry(GeometryCombineMode.Union, sweptPathGeo, getShadow(startPoint, lineSegment.Point, translate));

startPoint = lineSegment.Point;

}

}

}

//sweptPathGeo = sweptPathGeo.GetOutlinedPathGeometry();

Debug.WriteLine("Finale Outline Verticies: " + CountVerticies(sweptPathGeo.GetFlattenedPathGeometry()));

return sweptPathGeo;

}

public Geometry getShadow(Point startPoint, Point endPoint, Point translate)

{

PointCollection points = new PointCollection();

points.Add(startPoint);

points.Add(endPoint);

points.Add(new Point(endPoint.X + translate.X, endPoint.Y + translate.Y));

points.Add(new Point(startPoint.X + translate.X, startPoint.Y + translate.Y));

points.Add(startPoint);

Polygon poly = new Polygon();

poly.Points = points;

poly.Arrange(geometry.Bounds);

poly.Measure(geometry.Bounds.Size);

PathGeometry returnGeo = poly.RenderedGeometry.GetOutlinedPathGeometry();

return returnGeo;

//foreach (Point point in points) Debug.WriteLine(point.X + ", " + point.Y);

}

private int CountVerticies(PathGeometry geo)

{

int verticies = 0;

foreach (PathFigure figure in geo.Figures)

{

Point startPoint = figure.StartPoint;

verticies += 1;

foreach (PathSegment segment in figure.Segments)

{

PolyLineSegment polySegment = segment as PolyLineSegment;

if (polySegment != null) verticies += polySegment.Points.Count;

LineSegment lineSegment = segment as LineSegment;

if (lineSegment != null) verticies += 1;

}

}

return verticies;

}

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