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DataDisplay/Common/PointMapping.cs

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+using SkiaSharp;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace DataDisplay.Common
+{
+  public class PointMapping
+  {
+    public PointMapping(double width,double height,double xDataExtent,double xDataExtentMin,double yDataExtent,double yDataExtentMin,double xMarginExtent=0.00,double yMarginExtent=0.00)
+    {
+      Width=width;
+      Height=height;
+      XMargin=xMarginExtent;
+      YMargin=yMarginExtent;
+      XDataExtent=xDataExtent;
+      XDataExtentMin=xDataExtentMin;
+      YDataExtent=yDataExtent;
+      YDataExtentMin=yDataExtentMin;
+      XScalingFactor=(Width-(XMargin*2))/(XDataExtent-XDataExtentMin);
+      YScalingFactor=(Height-(YMargin*2))/(YDataExtent-YDataExtentMin);
+    }
+// MapPoint will both scale the given point and translate the given point from an upper left origin system to a bottom left origin system
+    public SKPoint MapPoint(SKPoint sourcePoint)
+    {
+      SKPoint mappedPoint=new SKPoint((float)((sourcePoint.X-XDataExtentMin)*XScalingFactor),(float)(Height-((sourcePoint.Y-YDataExtentMin)*YScalingFactor)));
+      mappedPoint.X+=(float)XMargin;   // offset by the xMargin
+      mappedPoint.Y-=(float)YMargin;   // offset by the yMargin
+      return mappedPoint;
+    }
+// TranslatePoint will only translate the given point from an upper left origin system to a bottom left origin system
+    public SKPoint TranslatePoint(SKPoint sourcePoint)
+    {
+      SKPoint mappedPoint=new SKPoint((float)sourcePoint.X,(float)(Height-sourcePoint.Y-1));
+      return mappedPoint;
+    }
+    public double Width{get;private set;}
+    public double Height{get;private set;}
+    public double XDataExtent{get;private set;}
+    public double XDataExtentMin{get;private set;}
+    public double XRange{get{return XDataExtent-XDataExtentMin;}}
+    public double YDataExtent{get;private set;}
+    public double YDataExtentMin{get;private set;}
+    public double YRange{get{return YDataExtent-YDataExtentMin;}}
+    public double XMargin{get;private set;}
+    public double YMargin{get;private set;}
+    public double XScalingFactor{get;private set;}
+    public double YScalingFactor{get;private set;}
+  }
+}