我試圖創建繪製幾何圖形的筆刷。一切工作正常,直到我試圖添加Dashing的形狀。當筆具有DashStyle而非Null時,StreamGeometry不會被柵格化
我發現當我使用Geometry.Parse創建幾何時,虛線顯示正確,但是當我直接使用StreamGeometryContext創建它時,沒有任何東西被渲染。
這是我使用的代碼:
private void RenderGeometryAndSetAsBackground()
{
Point startPoint = new Point(3505961.52400725, 3281436.57325874);
Point[] points = new Point[] {
new Point(3503831.75515445,3278705.9649394),
new Point(3503905.74802898,3278449.37713916),
new Point(3507242.57331039,3276518.41148474),
new Point(3507700.6914325,3276536.23547958),
new Point(3510146.73449577,3277964.12812859),
new Point(3509498.96473447,3278678.60178448),
new Point(3507412.1889951,3277215.64022219),
new Point(3504326.22698001,3278682.85514017),
new Point(3506053.34789057,3281390.66371786)};
string geom = "M3505961.52400725,3281436.57325874L3503831.75515445,3278705.9649394 3503905.74802898,3278449.37713916 3507242.57331039,3276518.41148474 3507700.6914325,3276536.23547958 3510146.73449577,3277964.12812859 3509498.96473447,3278678.60178448 3507412.1889951,3277215.64022219 3504326.22698001,3278682.85514017 3506053.34789057,3281390.66371786";
//Geometry geometry = StreamGeometry.Parse(geom);
StreamGeometry geometry = new StreamGeometry();
using (StreamGeometryContext sgc = geometry.Open())
{
sgc.BeginFigure(startPoint, false, true);
foreach (Point p in points)
{
sgc.LineTo(p, true, true);
}
}
Pen pen = new Pen(Brushes.Yellow, 3);
pen.DashStyle = new DashStyle(new double[] { 30, 30 }, 0);
//GeometryDrawing gd = new GeometryDrawing(null, pen, path.RenderedGeometry);
GeometryDrawing gd = new GeometryDrawing(null, pen, geometry);
DrawingBrush drawingBrush = new DrawingBrush(gd);
DrawingBrush tile = drawingBrush.Clone();
tile.Viewbox = new Rect(0.5, 0, 0.25, 0.25);
RenderTargetBitmap rtb = new RenderTargetBitmap(256, 256, 96, 96, PixelFormats.Pbgra32);
var drawingVisual = new DrawingVisual();
using (DrawingContext context = drawingVisual.RenderOpen())
{
context.DrawRectangle(tile, null, new Rect(0, 0, 256, 256));
}
rtb.Render(drawingVisual);
ImageBrush bgBrush = new ImageBrush(rtb);
Background = bgBrush;
}
當這樣做的方式,沒有什麼是越來越繪製。如果我不使用衝刺(或將衝刺設置爲空),它可以正常工作。如果我使用StreamGeometry.Parse(geom)
並保持速度,它也可以。
試圖撥打sgc.Close()
沒有幫助。目前我唯一的解決方法是調用:
geometry = Geometry.Parse(geometry.ToString());
這是不是很不錯...
我缺少什麼?