source: branches/HeuristicLab.Problems.GaussianProcessTuning/ILNumerics.2.14.4735.573/Drawing/Misc/ILGraphComparer.cs @ 11826

///
///    This file is part of ILNumerics Community Edition.
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///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
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using System;
using System.Collections.Generic;
using System.Text;
using ILNumerics.Drawing.Graphs; 

namespace ILNumerics.Drawing.Misc {
    public class ILGraphComparer : IComparer<ILGraph> {

        ILCamera m_camera;

        public ILCamera Camera {
            get { return m_camera; }
            set { m_camera = value; }
        } 

        public ILGraphComparer () {}



        #region IComparer<ILGraph> Member

        /// <summary>
        /// sort graphs regarding their Z order 
        /// </summary>
        /// <param name="x">first graph</param>
        /// <param name="y">second graph</param>
        /// <returns></returns>
        public int Compare(ILGraph x, ILGraph y) {
            if (m_camera.LooksFromTop)
                return Comparer<float>.Default.Compare(x.Limits.CenterF.Z,y.Limits.CenterF.Z); 
            else     
                return Comparer<float>.Default.Compare(y.Limits.CenterF.Z,x.Limits.CenterF.Z); 
            // if finer control over sorting is needed, try the following code instead! 
            //ILPoint3Df cent1 = x.Limits.CenterF; 
            //ILPoint3Df cent2 = y.Limits.CenterF; 
            //float distX = cent1.X - m_camera.X; 
            //float distY = cent1.Y - m_camera.Y; 
            //float distZ = cent1.Z - m_camera.Z; 
            //float dist1 = distX * distX + distY * distY + distZ * distZ; 
            //distX = cent2.X - m_camera.X;
            //distY = cent2.Y - m_camera.Y;
            //distZ = cent2.Z - m_camera.Z;
            //float dist2 = distX * distX + distY * distY + distZ * distZ; 
            //if (dist2 > dist1) {
            //    return 1; 
            //} else if (dist2 == dist1) {
            //    return 0; 
            //} else 
            //    return -1; 
        }
        #endregion
    }
}