NT8 - Fill Region

[mk77ch]

Hello,

What is the best way in NT8 onRender to fill a region with 4 data points between 2 lines?

Thank you

[NinjaTrader_ChelseaB]

Hello mk77ch,

This would depend on the type of shape you are wanting.

The easist way would be to use RenderTarget.FillRectangle().

http://ninjatrader.com/support/helpGuides/nt8/en-us/onrender.htm

If you need a non-rectangular shape, you may want to use RenderTarget.FillGeometry().

Below is a link to a 3rd party site that shows an example of this.

http://stackoverflow.com/questions/27289470/draw-and-fill-polygon-using-float-points-sharpdx

[mk77ch]

Hi Chelsea,

Thank you very much for your reply.
I would need the FillGeometry example.
Did you post the correct link for the 3rd party site?
The link points to the Ninjatrader Help files.

Best regards,
Mike

[NinjaTrader_ChelseaB]

Hi Mike,

My clipboard is acting up today.

The correct link is below.

http://stackoverflow.com/questions/27289470/draw-and-fill-polygon-using-float-points-sharpdx

[mk77ch]

Thank you Chelsea,

in case somebody needs a working example to use in onRender, here is a snippet.
My sample fills a trapezoid between two lines (4 data points):

SharpDX.Direct2D1.PathGeometry geo = new SharpDX.Direct2D1.PathGeometry(RenderTarget.Factory);
SharpDX.Direct2D1.GeometrySink snk;

SharpDX.Vector2[] vec = new SharpDX.Vector2[4];

vec[0] = new SharpDX.Vector2(x1, y1);
vec[1] = new SharpDX.Vector2(x2, y3);
vec[2] = new SharpDX.Vector2(x2, y4);
vec[3] = new SharpDX.Vector2(x1, y2);

snk = geo.Open();
snk.BeginFigure(vec[0], new SharpDX.Direct2D1.FigureBegin());
snk.AddLines(new SharpDX.Vector2[] { vec[1], vec[2], vec[3] });
snk.EndFigure(new SharpDX.Direct2D1.FigureEnd());
snk.Close();

RenderTarget.FillGeometry(geo, geoBrush);

geo.Dispose();
snk.Dispose();

Cheers,
Mike