c# - 通过 sharpdx API 绘制和填充具有 4 个顶点(二维位置)的多边形

Question

我有 4 个浮点(2D 中的位置)，我想在 2D 中绘制并填充一个多边形(在这 4 个位置有顶点)。

我如何使用 sharpdx 做到这一点？

Answer 1

我找到了如何绘制和填充多边形。我使用了 RenderTarget 对象的 drawGeometry 和 fillGeometry 方法。

如何初始化directx就不说了

    PathGeometry geo1;
    GeometrySink sink1;

        FactoryD2D factory = new FactoryD2D();
        var dpi = factory.DesktopDpi;
        RenderTarget renderTarget;

        renderTarget = new RenderTarget(factory, backBuffer, new RenderTargetProperties()
        {
            DpiX = dpi.Width,
            DpiY = dpi.Height,
            MinLevel = SharpDX.Direct2D1.FeatureLevel.Level_DEFAULT,
            PixelFormat = new SharpDX.Direct2D1.PixelFormat(Format.Unknown, AlphaMode.Ignore),
            Type = RenderTargetType.Hardware,
            Usage = RenderTargetUsage.None
        });

        // and after all initialization

            pta[0] = new SharpDX.Vector2(pts[4].X, pts[4].Y);
            pta[1] = new SharpDX.Vector2(pts[5].X, pts[5].Y);
            pta[2] = new SharpDX.Vector2(pts[6].X, pts[6].Y);
            pta[3] = new SharpDX.Vector2(pts[7].X, pts[7].Y);

            geo1 = new PathGeometry(factory);
            sink1 = geo1.Open();
            sink1.BeginFigure(pta[0], new FigureBegin());
            sink1.AddLines(new SharpDX.Vector2[] { pta[1], pta[2], pta[3] });
            sink1.EndFigure(new FigureEnd());
            sink1.Close();

        Color penColor = Color.Black;
        SolidColorBrush penBrush = new SolidColorBrush(g, new SharpDX.Color(penColor.R, penColor.G, penColor.B));
        Color color = AddColor(pt, zmin, zmax);
        SolidColorBrush aBrush = new SolidColorBrush(g, new SharpDX.Color(color.R, color.G, color.B));

            renderTarget.DrawGeometry(geo1, penBrush);
            renderTarget.FillGeometry(geo1, aBrush);
            geo1.Dispose();
            sink1.Dispose();

您可以添加其他 geos 和水槽，以便在其上添加更多形状

希望这对像我一样迷路并拼命寻找答案的人有所帮助