SvgPoint.cs :  » GUI » SharpVectorGraphics » SharpVectors » Dom » Svg » C# / CSharp Open Source

using System;

namespace SharpVectors.Dom.Svg{
  /// <summary>
  /// Many of the SVG DOM interfaces refer to objects of class SvgPoint.
  /// An SvgPoint is an (x,y) coordinate pair. When used in matrix 
  /// operations, an SvgPoint is treated as a vector of the form:  
  ///     [x]
  ///     [y]
  ///     [1]
  /// </summary>
  /// <developer>niklas@protocol7.com</developer>
  /// <developer>kevin@kevlindev.com</developer>
  /// <completed>100</completed>
  public class SvgPoint : ISvgPoint
  {
    #region Fields
    private double x;
    private double y;
    #endregion
    
    #region Constructor
    public SvgPoint(double x, double y)
    {
      this.x = x;
      this.y = y;
    }
    #endregion

        #region ISvgPoint Interface
    public float X
    {
      get { return (float) x; }
      set { x = value; }
    }

    public float Y
    {
      get { return (float) y; }
      set { y = value; }
    }

    public ISvgPoint MatrixTransform(ISvgMatrix matrix)
    {
      return new SvgPoint(
                matrix.A*x + matrix.C*y + matrix.E,
                matrix.B*x + matrix.D*y + matrix.F
            );
    }
    #endregion

        #region Additional operators
        public SvgPoint lerp(SvgPoint that, double percent) 

        {
            return new SvgPoint(
                this.x + (that.x - this.x)*percent,
                this.y + (that.y - this.y)*percent
            );
        }

        public static SvgPoint operator+(SvgPoint a, SvgPoint b)
        {
            return new SvgPoint(
                a.x + b.x,
                a.y + b.y
            );
        }

        public static SvgPoint operator-(SvgPoint a, SvgPoint b)
        {
            return new SvgPoint(
                a.x - b.x,
                a.y - b.y
            );
        }

        public static SvgPoint operator*(SvgPoint a, double scalar)
        {
            return new SvgPoint(
                a.x * scalar,
                a.y * scalar
            );
        }

        public static SvgPoint operator*(double scalar, SvgPoint a)
        {
            return new SvgPoint(
                scalar * a.x,
                scalar * a.y
            );
        }
        
        public static SvgPoint operator/(SvgPoint a, double scalar)
        {
            return new SvgPoint(
                a.x / scalar,
                a.y / scalar
                );
        }

        public static SvgPoint operator/(double scalar, SvgPoint a)
        {
            return new SvgPoint(
                scalar / a.x,
                scalar / a.y
                );
        }
        #endregion
  }
}