1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | #include <stdlib.h> |
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3 | #include <stdio.h> |
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4 | |
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5 | #include <GL/glew.h> |
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6 | #include <GL/gl.h> |
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7 | |
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8 | #include "Grid.h" |
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9 | #include "Trace.h" |
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10 | |
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11 | #define NUMDIGITS 6 |
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12 | #define GRID_TICK 0.05 |
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13 | |
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14 | Grid::Grid() : |
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15 | xAxis("X"), |
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16 | yAxis("Y"), |
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17 | zAxis("Z"), |
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18 | _axisColor(1.0f, 1.0f, 1.0f, 1.0f), |
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19 | _majorColor(1.0f, 1.0f, 1.0f, 1.0f), |
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20 | _minorColor(0.5f, 0.5f, 0.5f, 1.0f), |
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21 | _font(NULL), |
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22 | _visible(false) |
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23 | { |
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24 | } |
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25 | |
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26 | Grid::~Grid() |
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27 | { |
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28 | } |
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29 | |
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30 | void Grid::render() |
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31 | { |
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32 | glPushAttrib(GL_ENABLE_BIT); |
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33 | |
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34 | glEnable(GL_DEPTH_TEST); |
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35 | glDisable(GL_TEXTURE_2D); |
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36 | glEnable(GL_BLEND); |
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37 | #ifdef notdef |
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38 | glEnable(GL_LINE_SMOOTH); |
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39 | #endif |
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40 | |
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41 | glMatrixMode(GL_MODELVIEW); |
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42 | glPushMatrix(); |
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43 | |
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44 | double xDataRange = xAxis.dataMax() - xAxis.dataMin(); |
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45 | double yDataRange = yAxis.dataMax() - yAxis.dataMin(); |
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46 | double zDataRange = zAxis.dataMax() - zAxis.dataMin(); |
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47 | |
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48 | double paspectX = 1.0f; |
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49 | double paspectY = yDataRange / xDataRange; |
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50 | double paspectZ = zDataRange / xDataRange; |
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51 | |
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52 | double xscale = xAxis.range() / xDataRange; |
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53 | double yscale = yAxis.range() / xDataRange; |
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54 | double zscale = zAxis.range() / xDataRange; |
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55 | |
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56 | double xoffset = (xAxis.min() - xAxis.dataMin()) * xAxis.scale(); |
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57 | double yoffset = (yAxis.min() - yAxis.dataMin()) * yAxis.scale(); |
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58 | double zoffset = (zAxis.min() - zAxis.dataMin()) * zAxis.scale(); |
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59 | |
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60 | TRACE("Axis ranges: %g %g %g\n", xAxis.range(), yAxis.range(), zAxis.range()); |
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61 | TRACE("Axis scales: %g %g %g\n", xAxis.scale(), yAxis.scale(), zAxis.scale()); |
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62 | TRACE("Axis min/max: %g,%g %g,%g %g,%g\n", |
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63 | xAxis.min(), xAxis.max(), |
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64 | yAxis.min(), yAxis.max(), |
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65 | zAxis.min(), zAxis.max()); |
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66 | TRACE("Axis vmin/vmax: %g,%g %g,%g %g,%g\n", |
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67 | xAxis.dataMin(), xAxis.dataMax(), |
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68 | yAxis.dataMin(), yAxis.dataMax(), |
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69 | zAxis.dataMin(), zAxis.dataMax()); |
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70 | TRACE("paspect: %g %g %g\n", paspectX, paspectY, paspectZ); |
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71 | TRACE("scale: %g %g %g\n", xscale, yscale, zscale); |
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72 | |
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73 | glTranslatef(-0.5f * paspectX, -0.5f * paspectY, -0.5f * paspectZ); |
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74 | glScalef(xscale, yscale, zscale); |
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75 | glTranslatef(xoffset, yoffset, zoffset); |
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76 | |
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77 | glLineWidth(2.0f); |
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78 | glColor4f(_axisColor.red, _axisColor.green, _axisColor.blue, |
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79 | _axisColor.alpha); |
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80 | |
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81 | glBegin(GL_LINES); |
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82 | { |
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83 | glVertex3f(0.0f, 0.0f, 0.0f); |
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84 | glVertex3f(1.0f + GRID_TICK, 0.0f, 0.0f); |
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85 | glVertex3f(0.0f, 0.0f, 0.0f); |
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86 | glVertex3f(0.0f, 1.0f + GRID_TICK, 0.0f); |
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87 | glVertex3f(0.0f, 0.0f, 0.0f); |
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88 | glVertex3f(0.0f, 0.0f, 1.0f + GRID_TICK); |
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89 | } |
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90 | glEnd(); |
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91 | |
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92 | glLineWidth(1.0f); |
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93 | glColor4f(_majorColor.red, _majorColor.green, _majorColor.blue, |
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94 | _majorColor.alpha); |
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95 | |
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96 | glBegin(GL_LINES); |
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97 | { |
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98 | bool result; |
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99 | TickIter iter; |
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100 | |
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101 | for (result = xAxis.firstMajor(iter); result; result = iter.next()) { |
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102 | float x; |
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103 | x = xAxis.map(iter.getValue()); |
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104 | glVertex3f(x, 0.0f, 0.0f); |
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105 | glVertex3f(x, 1.0f, 0.0f); |
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106 | glVertex3f(x, 0.0f, 0.0f); |
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107 | glVertex3f(x, 0.0f, 1.0f + GRID_TICK); |
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108 | } |
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109 | for (result = yAxis.firstMajor(iter); result; result = iter.next()) { |
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110 | float y; |
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111 | y = yAxis.map(iter.getValue()); |
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112 | glVertex3f(0.0f, y, 0.0f); |
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113 | glVertex3f(1.0f + GRID_TICK, y, 0.0f); |
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114 | glVertex3f(0.0f, y, 0.0f); |
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115 | glVertex3f(0.0f, y, 1.0f); |
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116 | } |
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117 | for (result = zAxis.firstMajor(iter); result; result = iter.next()) { |
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118 | float z; |
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119 | z = zAxis.map(iter.getValue()); |
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120 | glVertex3f(0.0f, 0.0f, z); |
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121 | glVertex3f(0.0f, 1.0f, z); |
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122 | glVertex3f(0.0f, 0.0f, z); |
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123 | glVertex3f(1.0f + GRID_TICK, 0.0f, z); |
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124 | } |
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125 | } |
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126 | glEnd(); |
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127 | |
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128 | // Set minor line color |
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129 | glColor4f(_minorColor.red, _minorColor.green, _minorColor.blue, |
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130 | _minorColor.alpha); |
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131 | |
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132 | glBegin(GL_LINES); |
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133 | { |
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134 | bool result; |
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135 | TickIter iter; |
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136 | |
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137 | for (result = xAxis.firstMinor(iter); result; result = iter.next()) { |
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138 | float x; |
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139 | x = xAxis.map(iter.getValue()); |
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140 | glVertex3f(x, 0.0f, 0.0f); |
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141 | glVertex3f(x, 1.0f, 0.0f); |
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142 | glVertex3f(x, 0.0f, 0.0f); |
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143 | glVertex3f(x, 0.0f, 1.0f); |
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144 | } |
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145 | for (result = yAxis.firstMinor(iter); result; result = iter.next()) { |
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146 | float y; |
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147 | y = yAxis.map(iter.getValue()); |
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148 | glVertex3f(0.0f, y, 0.0f); |
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149 | glVertex3f(1.0f, y, 0.0f); |
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150 | glVertex3f(0.0f, y, 0.0f); |
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151 | glVertex3f(0.0f, y, 1.0f); |
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152 | } |
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153 | for (result = zAxis.firstMinor(iter); result; result = iter.next()) { |
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154 | float z; |
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155 | z = zAxis.map(iter.getValue()); |
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156 | glVertex3f(0.0f, 0.0f, z); |
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157 | glVertex3f(0.0f, 1.0f, z); |
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158 | glVertex3f(0.0f, 0.0f, z); |
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159 | glVertex3f(1.0f, 0.0f, z); |
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160 | } |
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161 | } |
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162 | glEnd(); |
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163 | |
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164 | if (_font != NULL) { |
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165 | double mv[16], prjm[16]; |
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166 | int viewport[4]; |
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167 | double wx, wy, wz; |
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168 | bool result; |
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169 | TickIter iter; |
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170 | |
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171 | glGetDoublev(GL_MODELVIEW_MATRIX, mv); |
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172 | glGetDoublev(GL_PROJECTION_MATRIX, prjm); |
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173 | glGetIntegerv(GL_VIEWPORT, viewport); |
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174 | |
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175 | _font->begin(); |
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176 | if (gluProject(1.2, 0.0, 0.0, mv, prjm, viewport, &wx, &wy, &wz)) { |
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177 | glLoadIdentity(); |
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178 | glTranslatef((int) wx, viewport[3] - (int) wy, 0); |
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179 | const char *name = xAxis.name(); |
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180 | if (name == NULL) { |
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181 | name = "???"; |
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182 | } |
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183 | _font->draw(name); |
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184 | } |
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185 | |
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186 | if (gluProject(0.0, 1.2, 0.0, mv, prjm, viewport, &wx, &wy, &wz)) { |
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187 | glLoadIdentity(); |
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188 | glTranslatef((int) wx, viewport[3] - (int)wy, 0); |
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189 | const char *name = yAxis.name(); |
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190 | if (name == NULL) { |
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191 | name = "???"; |
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192 | } |
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193 | _font->draw(name); |
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194 | } |
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195 | |
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196 | if (gluProject(0.0, 0.0, 1.2, mv, prjm, viewport, &wx, &wy, &wz)) { |
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197 | glLoadIdentity(); |
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198 | glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f); |
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199 | const char *name = zAxis.name(); |
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200 | if (name == NULL) { |
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201 | name = "???"; |
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202 | } |
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203 | _font->draw(name); |
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204 | } |
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205 | |
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206 | glColor4f(1.0f, 1.0f, 0.0f, 1.0f); |
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207 | |
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208 | for (result = xAxis.firstMajor(iter); result; result = iter.next()) { |
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209 | float x; |
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210 | x = xAxis.map(iter.getValue()); |
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211 | if (gluProject(x, 0.0f, 1.06f, mv, prjm, viewport, &wx, &wy, &wz)) { |
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212 | char buff[20]; |
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213 | glLoadIdentity(); |
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214 | glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f); |
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215 | sprintf(buff, "%.*g", NUMDIGITS, iter.getValue()); |
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216 | _font->draw(buff); |
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217 | } |
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218 | } |
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219 | for (result = yAxis.firstMajor(iter); result; result = iter.next()) { |
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220 | float y; |
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221 | y = yAxis.map(iter.getValue()); |
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222 | if (gluProject(1.06f, y, 0.0f, mv, prjm, viewport, &wx, &wy, &wz)) { |
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223 | char buff[20]; |
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224 | glLoadIdentity(); |
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225 | glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f); |
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226 | sprintf(buff, "%.*g", NUMDIGITS, iter.getValue()); |
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227 | _font->draw(buff); |
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228 | } |
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229 | } |
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230 | for (result = zAxis.firstMajor(iter); result; result = iter.next()) { |
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231 | float z; |
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232 | z = zAxis.map(iter.getValue()); |
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233 | if (gluProject(1.06f, 0.0f, z, mv, prjm, viewport, &wx, &wy, &wz)) { |
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234 | char buff[20]; |
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235 | glLoadIdentity(); |
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236 | glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f); |
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237 | sprintf(buff, "%.*g", NUMDIGITS, iter.getValue()); |
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238 | _font->draw(buff); |
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239 | } |
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240 | } |
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241 | _font->end(); |
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242 | }; |
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243 | |
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244 | glPopMatrix(); |
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245 | glPopAttrib(); |
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246 | } |
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247 | |
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248 | void Grid::setFont(R2Fonts *font) |
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249 | { |
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250 | // if (font == _font) return; |
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251 | // if (font) font->addRef(); |
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252 | // if (_font) _font->unrefDelete(); |
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253 | |
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254 | _font = font; |
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255 | } |
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256 | |
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