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DataDisplay/Common/DrawingHelper.cs

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+using SkiaSharp;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DataDisplay.Common
+{
+  public class DrawingHelper
+  {
+    private DrawingHelper()
+    {
+    }
+    public static void DrawIsoTriangle(SKCanvas canvas, SKPoint origin, int length, SKPaint paintStroke, SKPaint paintFill)
+    {
+      SKPath path = new SKPath();
+
+      float lengthF = (float)length;
+      float hLength = lengthF / 2f;
+      float height = (float)Math.Sqrt(Math.Pow(lengthF, 2) - Math.Pow(hLength, 2));
+
+      height/=1.15f;               // reduce the height by 15%
+
+      path.MoveTo(origin.X, origin.Y);
+      path.LineTo(origin.X - hLength, origin.Y + height);
+      path.LineTo(origin.X + hLength, origin.Y + height);
+      path.LineTo(origin.X, origin.Y);
+      path.Close();
+      canvas.DrawPath(path, paintStroke);
+      canvas.DrawPath(path, paintFill);
+    }
+  }
+}