///
///    This file is part of ILNumerics Community Edition.
///
///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
///
///    ILNumerics Community Edition is free software: you can redistribute it and/or modify
///    it under the terms of the GNU General Public License version 3 as published by
///    the Free Software Foundation.
///
///    ILNumerics Community Edition is distributed in the hope that it will be useful,
///    but WITHOUT ANY WARRANTY; without even the implied warranty of
///    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
///    GNU General Public License for more details.
///
///    You should have received a copy of the GNU General Public License
///    along with ILNumerics Community Edition. See the file License.txt in the root
///    of your distribution package. If not, see <http://www.gnu.org/licenses/>.
///
///    In addition this software uses the following components and/or licenses: 
///
///    =================================================================================
///    The Open Toolkit Library License
///    
///    Copyright (c) 2006 - 2009 the Open Toolkit library.
///    
///    Permission is hereby granted, free of charge, to any person obtaining a copy
///    of this software and associated documentation files (the "Software"), to deal
///    in the Software without restriction, including without limitation the rights to 
///    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
///    the Software, and to permit persons to whom the Software is furnished to do
///    so, subject to the following conditions:
///
///    The above copyright notice and this permission notice shall be included in all
///    copies or substantial portions of the Software.
///
///    =================================================================================
///    

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing; 
using ILNumerics.Drawing; 
using ILNumerics.Drawing.Interfaces; 

namespace ILNumerics.Drawing.Graphs {
    /// <summary>
    /// Surface graph
    /// </summary>
    public abstract class ILSurfaceGraph : ILFilledGraph, IILLegendRenderer, IILPanelConfigurator {

        #region attributes
        protected ShadingStyles m_shading;
        #endregion

        #region properties
        /// <summary>
        /// determine, how the color for surface tiles will be drawn
        /// </summary>
        /// <remarks>Interpolated will interpolate the color for the 
        /// tiles between all corner data points. Flat will draw the area of the 
        /// tile in a single color. The color than reflects the average value of 
        /// all corner data points.</remarks>
        public ShadingStyles Shading {
            get {
                return m_shading; 
            }
            set {
                m_shading = value; 
                OnChanged("Shading"); 
            }
        }
        #endregion

        #region constructor
        /// <summary>
        /// construct new surface graph, provide all 3 coordinates
        /// </summary>
        /// <param name="panel">panel this graph is to be hosted in</param>
        /// <param name="X">X coordinates</param>
        /// <param name="Y">Y coordinates</param>
        /// <param name="Z">Z coordinates</param>
        /// <param name="C">Color values</param>
        /// <param name="clippingContainer"></param>
        public ILSurfaceGraph(ILPanel panel, ILArray<float> X, ILArray<float> Y,
                               ILArray<float> Z, ILArray<float> C, ILClippingData clippingContainer)
            : base(panel, X, Y, Z, C, clippingContainer) {
            using (ILScope.Enter(X, Y, Z, C)) {
                m_graphType = GraphType.Surf;
                m_wireLines.Width = 1;
                m_wireLines.Antialiasing = false;
                m_wireLines.Color = System.Drawing.Color.Blue;
                m_opacity = 0.84f;
            }
        }
        #endregion

        #region ILFilledGraph overloads 
        /// <summary>
        /// create indices for ILSurfaceGraph triangles 
        /// </summary>
        /// <remarks>If possible, the indices will assemble triangle strips. If not -
        /// the base implementation will be used to create individual triangles.</remarks>
        protected override void CreateIndices() {
            if (m_opacity == 1.0f &&  m_shading == ShadingStyles.Interpolate) {
                #region no transparency
                // simple case: DepthTest on, we can do fast drawing
                // with low number on indices needed (triangle strips)
                checkVertexIndicesLength(m_cols * 2,m_rows-1); 
                int pos1 = 0, pos2 = m_cols, posI = 0; 
                while (posI < m_indicesCount) {
                    m_indices[posI++] = (uint)pos2++; 
                    m_indices[posI++] = (uint)pos1++;
                }
                #endregion
                if (m_wireLines.Visible) {
                    #region looking from front
                    posI = 0; 
                    System.Diagnostics.Debug.WriteLine("CosPhi > 0 & SinPhi > 0 (grid front)");
                    checkGridIndicesLength((m_cols-1) * 4 + 2,m_rows-1); 
                    pos1 = m_Vertcount-m_cols; 
                    pos2 = m_Vertcount-m_cols;
                    // first row is special:
                    for (int c = m_cols-1; c-->0;) {
                        m_gridIndices[posI++] = (uint)pos1++; 
                        m_gridIndices[posI++] = (uint)pos1; 
                    }
                    pos1 -= 2*m_cols-1; 
                    for (int r = m_rows-1; r-->0;) {
                        // first column is special: 
                        m_gridIndices[posI++] = (uint)pos2; 
                        m_gridIndices[posI++] = (uint)pos1; 
                        for (int c = m_cols-1; c-->0;) {
                            m_gridIndices[posI++] = (uint)pos1++; 
                            m_gridIndices[posI++] = (uint)pos1; 
                            m_gridIndices[posI++] = (uint)++pos2; 
                            m_gridIndices[posI++] = (uint)pos1; 
                        }
                        pos1 -= (m_cols * 2 - 1); 
                        pos2 -= (m_cols * 2 - 1);
                    }
                    #endregion
                }
            } else {
                // create regular individual triangles 
                base.CreateIndices();
            }
        }
        public override bool Is3DGraph() {
            return true;
        }

        #endregion

        #region IILLegendRenderer
        public abstract void DrawToLegend(ILRenderProperties p, Rectangle sampleRect, Rectangle labelRect);
        public Size LabelSize { get { return m_label.Size; } }
        #endregion 

        #region IILPanelConfigurator
        public void ConfigurePanel(ILPanel panel) {
            panel.InteractiveMode = InteractiveModes.Rotating;
            panel.DefaultView.Set(5.8f, 1.17f, panel.DefaultView.Distance); 
        }

        #endregion
    }
}