1 | ///
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2 | /// This file is part of ILNumerics Community Edition.
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3 | ///
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4 | /// ILNumerics Community Edition - high performance computing for applications.
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5 | /// Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
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6 | ///
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7 | /// ILNumerics Community Edition is free software: you can redistribute it and/or modify
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8 | /// it under the terms of the GNU General Public License version 3 as published by
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9 | /// the Free Software Foundation.
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10 | ///
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11 | /// ILNumerics Community Edition is distributed in the hope that it will be useful,
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12 | /// but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | /// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | /// GNU General Public License for more details.
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15 | ///
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16 | /// You should have received a copy of the GNU General Public License
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17 | /// along with ILNumerics Community Edition. See the file License.txt in the root
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18 | /// of your distribution package. If not, see <http://www.gnu.org/licenses/>.
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19 | ///
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20 | /// In addition this software uses the following components and/or licenses:
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21 | ///
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22 | /// =================================================================================
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23 | /// The Open Toolkit Library License
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24 | ///
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25 | /// Copyright (c) 2006 - 2009 the Open Toolkit library.
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26 | ///
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27 | /// Permission is hereby granted, free of charge, to any person obtaining a copy
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28 | /// of this software and associated documentation files (the "Software"), to deal
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29 | /// in the Software without restriction, including without limitation the rights to
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30 | /// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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31 | /// the Software, and to permit persons to whom the Software is furnished to do
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32 | /// so, subject to the following conditions:
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33 | ///
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34 | /// The above copyright notice and this permission notice shall be included in all
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35 | /// copies or substantial portions of the Software.
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36 | ///
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37 | /// =================================================================================
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38 | ///
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39 |
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40 | using System;
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41 | using System.Collections.Generic;
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42 | using System.Text;
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43 | using System.Drawing;
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44 | using System.Data;
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45 | using System.Windows.Forms;
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46 | using ILNumerics.Exceptions;
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47 | using ILNumerics.Drawing;
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48 | using System.Resources;
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49 | using OpenTK;
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50 | using OpenTK.Graphics.OpenGL;
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51 | using OpenTK.Graphics;
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52 | using OpenTK.Graphics.OpenGL.Enums;
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53 | using ILNumerics.Drawing.Graphs;
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54 | using ILNumerics.Drawing.Platform.OpenGL;
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55 | using ILNumerics.Drawing.Misc;
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56 | using ILNumerics.Misc;
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57 | using VERTEXTYPEDEF = ILNumerics.Drawing.Platform.OpenGL.ILOGLSurfaceGraph.VertexC4N3V3;
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58 |
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59 | namespace ILNumerics.Drawing.Platform.OpenGL
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60 | {
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61 | /// <summary>
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62 | /// OpenGL implementation for ILSurfaceGraph
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63 | /// </summary>
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64 | public class ILOGLSurfaceGraph : ILSurfaceGraph {
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65 |
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66 | #region attributes
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67 | protected float[] m_vertices;
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68 | protected ShadingStyles m_oldShading;
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69 | protected ILColormap m_oldColormap;
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70 | #endregion
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71 |
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72 |
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73 | #region vertex definition
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74 | /// <summary>
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75 | /// Vertex definition: 4Color, 3Normal, 3 Vertex - all float
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76 | /// </summary>
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77 | /// <remarks>CAUTION! The vertex is not usable with OpenGL via vartex arrays this way!
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78 | /// We had to recognize sporadic crashs when drawing this way! Todo: ... to be investigated.</remarks>
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79 | [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)]
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80 | public struct VertexC4N3V3 {
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81 | public float CR;
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82 | public float CG;
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83 | public float CB;
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84 | public float CA;
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85 | public float Nx;
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86 | public float Ny;
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87 | public float Nz;
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88 | public float Vx;
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89 | public float Vy;
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90 | public float Vz;
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91 | }
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92 |
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93 | protected override void CreateVertices() {
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94 | ILColormap colormap = m_panel.Colormap;
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95 | if (m_vertices == null) {
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96 | m_vertices = ILMemoryPool.Pool.New<float>(m_Vertcount*10);
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97 | }
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98 | float val = 0.0f;
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99 | float minZ = m_globalClipping.ZMin, minC = (ILMath.isnullorempty(m_colors))? 0.0f : m_colors.MinValue;
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100 | float maxZ = m_globalClipping.ZMax;
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101 | bool useColorArray = !(object.Equals(m_colors,null) || m_colors.IsEmpty);
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102 | float a;
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103 | if (useColorArray)
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104 | a = colormap.Length / (m_colors.MaxValue - minC);
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105 | else {
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106 | if (maxZ - minZ != 0.0f)
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107 | a = colormap.Length / (maxZ - minZ);
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108 | else
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109 | a = 0.0f;
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110 | }
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111 | int curVertPos = 0, curVecPos = 0;
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112 | if (m_shading == ShadingStyles.Interpolate) {
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113 | #region shading interpolate
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114 | for (int r = 0; r < m_rows; r++) {
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115 | for (int c = 0; c < m_cols; c++) {
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116 | curVecPos = r + c * m_rows;
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117 | val = m_sourceArray.GetValue(r,c);
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118 | // set color values
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119 | if (useColorArray)
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120 | colormap.Map((m_colors.GetValue(curVecPos) - minC) * a, m_vertices, ref curVertPos);
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121 | else {
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122 | if (a != 0) {
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123 | colormap.Map((val - minZ) * a, m_vertices, ref curVertPos);
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124 | } else {
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125 | // plane: minz == maxz
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126 | colormap.Map(colormap.Length / 2, m_vertices, ref curVertPos);
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127 | }
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128 | }
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129 | m_vertices[curVertPos++] = m_opacity;
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130 | curVertPos += 3;
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131 | m_vertices[curVertPos++] = m_xCoords[curVecPos];
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132 | m_vertices[curVertPos++] = m_yCoords[curVecPos];
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133 | m_vertices[curVertPos++] = val;
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134 | }
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135 | }
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136 | #endregion
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137 | } else if (m_shading == ShadingStyles.Flat) {
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138 | #region shading flat
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139 | /* Consider a surface area like this:
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140 | *
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141 | * 8 - 9 -10 -11
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142 | * | / | / | / |
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143 | * 4 - 5 - 6 - 7
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144 | * | / | / | / |
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145 | * 0 - 1 - 2 - 3
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146 | *
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147 | * The rectangle surrounded by 0-1-4-5 is than colored by the
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148 | * vertex 5. This rectangle will be assembled by 2 triangles:
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149 | * 0-1-5 and 0-4-5. Therefore the color for both rectangles
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150 | * is the same and must be stored in the vertex No.5.
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151 | * The vertices can be assembled in natural order, beginning
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152 | * with 0 and approching m_vertexCount-1. The color for flat
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153 | * shading is averaged over the neighbor corners of each
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154 | * rectangle. In our Example the color stored in 5 is averaged
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155 | * over the values of the vertices 0,1,4 and 5. The first row
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156 | * and the first column are not used for the surface. However
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157 | * it may _be_ used for the wireframe grid if that is drawn with
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158 | * interpolated colors (Wireframe.Color.IsEmpty). So we must
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159 | * prepare the color for it -> here we just take the value itself.
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160 | */
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161 | // first row: no color average
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162 | for (int c = 0; c < m_cols; c++) {
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163 | val = m_sourceArray.GetValue(0,c);
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164 | if (useColorArray)
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165 | colormap.Map((m_colors.GetValue(0,c) - minC) * a, m_vertices,ref curVertPos);
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166 | else
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167 | colormap.Map((val - minZ) * a, m_vertices,ref curVertPos);
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168 | m_vertices[curVertPos++] = m_opacity;
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169 | curVertPos += 3;
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170 | m_vertices[curVertPos++] = m_xCoords[m_rows*c];
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171 | m_vertices[curVertPos++] = m_yCoords[m_rows*c];
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172 | m_vertices[curVertPos++] = val;
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173 | }
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174 | for (int r = 1; r < m_rows; r++) {
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175 | val = m_sourceArray.GetValue(r,0);
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176 | if (useColorArray)
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177 | colormap.Map((m_colors.GetValue(r) - minC) * a, m_vertices,ref curVertPos);
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178 | else
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179 | colormap.Map((val - minZ) * a, m_vertices,ref curVertPos);
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180 | m_vertices[curVertPos++] = m_opacity;
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181 | curVertPos += 3;
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182 | m_vertices[curVertPos++] = m_xCoords[r];
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183 | m_vertices[curVertPos++] = m_yCoords[r];
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184 | m_vertices[curVertPos++] = val;
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185 | // next columns: average color over precomputed corners
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186 | for (int c = 1; c < m_cols; c++) {
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187 | curVecPos = r + c * m_rows;
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188 | val = m_sourceArray.GetValue(r,c);
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189 | val += m_sourceArray.GetValue(r-1,c);
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190 | val += m_sourceArray.GetValue(r,c-1);
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191 | val += m_sourceArray.GetValue(r-1,c-1);
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192 | val /= 4;
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193 | if (useColorArray)
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194 | colormap.Map((m_colors.GetValue(curVecPos) - minC) * a, m_vertices,ref curVertPos);
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195 | else
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196 | colormap.Map((val - minZ) * a, m_vertices,ref curVertPos);
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197 | m_vertices[curVertPos++] = m_opacity;
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198 | curVertPos += 3;
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199 | m_vertices[curVertPos++] = m_xCoords[curVecPos];
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200 | m_vertices[curVertPos++] = m_yCoords[curVecPos];
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201 | m_vertices[curVertPos++] = m_sourceArray.GetValue(r,c);
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202 | }
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203 | }
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204 | #endregion
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205 | m_oldColormap = colormap;
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206 | }
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207 | #region create normals
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208 | // todo: depends on lighting enabled or not...!
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209 | // reset vertices pointer and start all over
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210 | curVertPos = 0; float nx,ny,nz;
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211 | for (int r = 0; r < m_rows; r++) {
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212 | for (int c = 0; c < m_cols; c++) {
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213 | nx= m_vertices[curVertPos+7];
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214 | ny= m_vertices[curVertPos+8];
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215 | nz= m_vertices[curVertPos+9];
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216 | if (c > 0) {
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217 | nx += m_vertices[curVertPos-3];
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218 | ny += m_vertices[curVertPos-2];
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219 | nz += m_vertices[curVertPos-1];
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220 | }
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221 | if (c < m_cols-1) {
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222 | nx += m_vertices[curVertPos+17];
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223 | ny += m_vertices[curVertPos+18];
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224 | nz += m_vertices[curVertPos+19];
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225 | }
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226 | if (r > 0 && r < m_rows) {
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227 | nx += m_vertices[curVertPos-m_cols*10+10];
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228 | ny += m_vertices[curVertPos-m_cols*10+11];
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229 | nz += m_vertices[curVertPos-m_cols*10+12];
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230 | }
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231 | if (r < m_rows - 1) {
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232 | nx += m_vertices[curVertPos+m_cols*10+10];
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233 | ny += m_vertices[curVertPos+m_cols*10+11];
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234 | nz += m_vertices[curVertPos+m_cols*10+12];
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235 | }
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236 | // normalize
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237 | float len = (float)Math.Sqrt(nx*nx+ny*ny+nz*nz);
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238 | m_vertices[curVertPos+4] = nx / len;
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239 | m_vertices[curVertPos+5] = ny / len;
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240 | m_vertices[curVertPos+6] = nz / len;
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241 | curVertPos+=10;
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242 | }
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243 | }
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244 | #endregion
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245 | m_oldShading = m_shading;
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246 | m_vertexReady = true;
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247 | }
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248 |
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249 |
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250 | #endregion
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251 |
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252 | #region constructor
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253 | internal ILOGLSurfaceGraph(ILOGLPanel panel, ILArray<float> X,
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254 | ILArray<float> Y, ILArray<float> Z, ILArray<float> C,
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255 | ILClippingData clippingContainer)
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256 | : base(panel,X,Y,Z,C,clippingContainer) {
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257 | m_indexReady = false;
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258 | m_vertexReady = false;
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259 | }
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260 |
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261 | #endregion
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262 |
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263 | #region abstract interface
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264 | /// <summary>
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265 | /// Dispose off this graph's vertices
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266 | /// </summary>
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267 | public override void Dispose() {
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268 | base.Dispose();
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269 | if (m_vertices != null) {
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270 | ILMemoryPool.Pool.Free<float>(m_vertices);
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271 | }
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272 | }
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273 | /// <summary>
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274 | /// Draw the graph
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275 | /// </summary>
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276 | public override void Draw(ILRenderProperties p) {
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277 | GL.BlendFunc (BlendingFactorSrc.SrcAlpha,
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278 | BlendingFactorDest.OneMinusSrcAlpha);
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279 | ILLineProperties wireprops = m_wireLines;
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280 | ILOGLPanel.SetupLineStyle(wireprops);
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281 | unsafe {
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282 | fixed (float* pVertices = m_vertices) {
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283 | // populate vertex array to GL
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284 | GL.InterleavedArrays(InterleavedArrayFormat.C4fN3fV3f
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285 | ,0,(IntPtr)pVertices);
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286 | // general setup shading & transparency
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287 | if (m_shading == ShadingStyles.Interpolate) {
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288 | GL.ShadeModel(ShadingModel.Smooth);
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289 | //GL.Disable(EnableCap.DepthTest);
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290 | } else {
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291 | GL.ShadeModel(ShadingModel.Flat);
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292 | //if (m_opacity < 1.0f)
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293 | //else
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294 | // GL.Enable(EnableCap.DepthTest);
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295 | }
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296 | GL.Enable(EnableCap.DepthTest);
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297 |
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298 |
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299 | if (m_opacity == 1.0f && m_shading == ShadingStyles.Interpolate) {
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300 | #region no transpareny
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301 | GL.Disable(EnableCap.Blend);
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302 | GL.Enable(EnableCap.DepthTest);
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303 | fixed (UInt32* pGridIndices = m_gridIndices)
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304 | fixed (UInt32* pIndices = m_indices) {
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305 | UInt32* pGridIndWalk = pGridIndices;
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306 | // first surface strip
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307 | if (m_filled) {
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308 | GL.DrawElements(BeginMode.TriangleStrip,m_stripesLen,
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309 | DrawElementsType.UnsignedInt,
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310 | (IntPtr)pIndices);
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311 | }
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312 | // first grid strip
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313 | if (m_wireLines.Visible) {
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314 | if (!wireprops.Color.IsEmpty) {
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315 | // if a color was specified, use it for wireframes!
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316 | GL.DisableClientState(EnableCap.ColorArray);
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317 | //GL.Color3(wireprops.ForeColor); // color for grid lines
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318 | }
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319 | GL.DrawElements(BeginMode.Lines,
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320 | m_gridStripsLen + m_gridStripsLenOnce, // 2*(m_cols-1),
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321 | DrawElementsType.UnsignedInt,
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322 | (IntPtr)pGridIndWalk);
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323 | pGridIndWalk += (m_gridStripsLen + m_gridStripsLenOnce);
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324 | if (!wireprops.Color.IsEmpty) {
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325 | GL.EnableClientState(EnableCap.ColorArray);
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326 | }
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327 | }
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328 | for (int i = 1; i < m_stripesCount; i++) {
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329 | // subsequent surface strips
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330 | if (m_filled) {
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331 | GL.DrawElements(BeginMode.TriangleStrip,
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332 | m_stripesLen,
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333 | DrawElementsType.UnsignedInt,
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334 | (IntPtr)(pIndices+i*m_stripesLen));
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335 | }
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336 | // subsequent grid strips
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337 | if (m_wireLines.Visible) {
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338 | GL.Disable(EnableCap.Blend);
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339 | if (!wireprops.Color.IsEmpty) {
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340 | // if a color was specified, use it for wireframes!
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341 | GL.DisableClientState(EnableCap.ColorArray);
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342 | //GL.Color3(wireprops.ForeColor); // color for grid lines
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343 | }
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344 | GL.DrawElements(BeginMode.Lines,
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345 | m_gridStripsLen,
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346 | DrawElementsType.UnsignedInt,
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347 | (IntPtr)(pGridIndWalk));
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348 | pGridIndWalk += m_gridStripsLen;
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349 | if (!wireprops.Color.IsEmpty) {
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350 | GL.EnableClientState(EnableCap.ColorArray);
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351 | }
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352 | }
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353 | }
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354 | GL.Finish();
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355 | }
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356 | #endregion
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357 | } else {
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358 | #region transparency or flat shading
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359 | GL.Enable(EnableCap.Blend);
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360 | fixed (UInt32* pGridIndices = m_gridIndices)
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361 | fixed (UInt32* pIndices = m_indices) {
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362 | UInt32* pGridIndWalk = pGridIndices;
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363 | // first surface strip
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364 | if (m_filled) {
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365 | GL.DrawElements(BeginMode.Triangles,m_stripesLen,
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366 | DrawElementsType.UnsignedInt,
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367 | (IntPtr)pIndices);
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368 | }
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369 | // first grid strip
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370 | if (m_wireLines.Visible) {
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371 | GL.Disable(EnableCap.Blend);
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372 | if (!wireprops.Color.IsEmpty) {
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373 | // if a color was specified, use it for wireframes!
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374 | GL.DisableClientState(EnableCap.ColorArray);
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375 | GL.Color3(m_wireLines.Color);
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376 | }
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377 | GL.DrawElements(BeginMode.Lines,
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378 | m_gridStripsLen + m_gridStripsLenOnce,
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379 | DrawElementsType.UnsignedInt,
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380 | (IntPtr)pGridIndWalk);
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381 | pGridIndWalk += m_gridStripsLen + m_gridStripsLenOnce;
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382 | if (!wireprops.Color.IsEmpty) {
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383 | // if a color was specified, use it for wireframes!
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384 | GL.EnableClientState(EnableCap.ColorArray);
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385 | }
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386 | GL.Enable(EnableCap.Blend);
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387 | }
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388 | for (int i = 1; i < m_stripesCount; i++) {
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389 | // subsequent surface strips
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390 | if (m_filled) {
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391 | GL.DrawElements(BeginMode.Triangles,
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392 | m_stripesLen,
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393 | DrawElementsType.UnsignedInt,
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394 | (IntPtr)(pIndices+i*m_stripesLen));
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395 | }
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396 | // subsequent grid strips
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397 | if (m_wireLines.Visible) {
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398 | GL.Disable(EnableCap.Blend);
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399 | if (!wireprops.Color.IsEmpty) {
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400 | // if a color was specified, use it for wireframes!
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401 | GL.DisableClientState(EnableCap.ColorArray);
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402 | GL.Color3(m_wireLines.Color);
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403 | }
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404 | GL.DrawElements(BeginMode.Lines,
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405 | m_gridStripsLen,
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406 | DrawElementsType.UnsignedInt,
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407 | (IntPtr)(pGridIndWalk));
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408 | if (!wireprops.Color.IsEmpty) {
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409 | GL.EnableClientState(EnableCap.ColorArray);
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410 | }
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411 | GL.Enable(EnableCap.Blend);
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412 | pGridIndWalk += m_gridStripsLen;
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413 | }
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414 | }
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415 | GL.Finish();
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416 | }
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417 | #endregion
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418 | }
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419 | }
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420 | }
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421 | //GL.Disable(EnableCap.Lighting);
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422 | //GL.PopMatrix();
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423 | }
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424 | /// <summary>
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425 | /// Ensures the recreation of the graph if neccessary
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426 | /// </summary>
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427 | public override void Invalidate() {
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428 | if (m_panel == null) return;
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429 | if (Math.Floor(m_panel.Camera.Phi / (Math.PI / 4.0)) != m_oldSubQuadrant) {
|
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430 | //must only recalculate indices, and only if the camera subquadrant has changed
|
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431 | m_indexReady = false;
|
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432 | m_isReady = false;
|
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433 | }
|
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434 | if (m_oldShading != m_shading) {
|
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435 | m_indexReady = false;
|
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436 | m_vertexReady = false;
|
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437 | m_isReady = false;
|
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438 | }
|
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439 | if (m_oldColormap != m_panel.Colormap) {
|
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440 | m_vertexReady = false;
|
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441 | m_isReady = false;
|
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442 | }
|
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443 | }
|
---|
444 | public override void DrawToLegend(ILRenderProperties p, Rectangle sampleRect, Rectangle labelRect) {
|
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445 | if (m_filled) {
|
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446 | // draw inner filled area
|
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447 | GL.ShadeModel(ShadingModel.Smooth);
|
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448 | GL.Begin(BeginMode.TriangleStrip);
|
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449 | GL.Color3(m_panel.Colormap[m_panel.Colormap.Length-1]);
|
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450 | GL.Vertex2(sampleRect.X,sampleRect.Y + sampleRect.Height);
|
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451 | GL.Color3(m_panel.Colormap[(int)(m_panel.Colormap.Length/2)]);
|
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452 | GL.Vertex2(sampleRect.X,sampleRect.Y);
|
---|
453 | GL.Vertex2(sampleRect.X+sampleRect.Width,sampleRect.Y + sampleRect.Height);
|
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454 | GL.Color3(m_panel.Colormap[0]);
|
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455 | GL.Vertex2(sampleRect.X+sampleRect.Width,sampleRect.Y);
|
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456 | GL.End();
|
---|
457 | }
|
---|
458 | if (m_wireLines.Visible) {
|
---|
459 | ILNumerics.Drawing.Platform.OpenGL.ILOGLPanel.SetupLineStyle(m_wireLines);
|
---|
460 | GL.Begin(BeginMode.LineStrip);
|
---|
461 | GL.Vertex2(sampleRect.X,sampleRect.Y);
|
---|
462 | GL.Vertex2(sampleRect.X+sampleRect.Width,sampleRect.Y);
|
---|
463 | GL.Vertex2(sampleRect.X+sampleRect.Width,sampleRect.Y + sampleRect.Height);
|
---|
464 | GL.Vertex2(sampleRect.X,sampleRect.Y + sampleRect.Height);
|
---|
465 | GL.Vertex2(sampleRect.X,sampleRect.Y);
|
---|
466 | GL.End();
|
---|
467 | }
|
---|
468 | m_label.m_position.X = labelRect.X + labelRect.Width / 2;
|
---|
469 | m_label.m_position.Y = labelRect.Y + labelRect.Height / 2;
|
---|
470 | m_label.Anchor = new PointF(.5f,0); // = TickLabelAlign.center | TickLabelAlign.vertCenter;
|
---|
471 | m_label.Draw(p);
|
---|
472 | }
|
---|
473 | #endregion
|
---|
474 |
|
---|
475 | #region helper function
|
---|
476 |
|
---|
477 | protected override void m_globalClipping_Changed(object sender, ClippingChangedEventArgs e) {
|
---|
478 | base.m_globalClipping_Changed(sender, e);
|
---|
479 | m_vertexReady = false;
|
---|
480 | m_indexReady = false;
|
---|
481 | Configure();
|
---|
482 | }
|
---|
483 |
|
---|
484 | #endregion
|
---|
485 | }
|
---|
486 | }
|
---|