1 | #include <float.h> |
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2 | #include <QMouseEvent> |
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3 | |
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4 | #include <GL/glu.h> // Added! for gluPerspective() call. [ben 27Sep13] |
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5 | |
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6 | #include "gui/QGLViewerWidget.h" |
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7 | |
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8 | #define INERTIA_MAX 5.0f |
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9 | #define INERTIA_THRESHOLD 0.2f |
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10 | |
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11 | using namespace gmtl; |
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12 | |
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13 | static void dom2vp(const QDomElement& parent, gmtl::Vec3f& center, gmtl::Quatf& rot, float& distance) |
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14 | { |
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15 | if (parent.isNull()) |
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16 | return; |
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17 | |
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18 | center[0] = parent.attribute("centerx", "0").toFloat(); |
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19 | center[1] = parent.attribute("centery", "0").toFloat(); |
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20 | center[2] = parent.attribute("centerz", "0").toFloat(); |
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21 | rot[0] = parent.attribute("rotx", "0").toFloat(); |
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22 | rot[1] = parent.attribute("roty", "0").toFloat(); |
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23 | rot[2] = parent.attribute("rotz", "0").toFloat(); |
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24 | rot[3] = parent.attribute("rotw", "1").toFloat(); |
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25 | distance = parent.attribute("distance", "1").toFloat(); |
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26 | } |
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27 | |
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28 | static QDomElement vp2dom(QDomDocument& doc, const gmtl::Vec3f& center, const gmtl::Quatf& rot, float distance) |
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29 | { |
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30 | QDomElement cm = doc.createElement("Camera"); |
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31 | cm.setAttribute("centerx", QString::number(center[0])); |
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32 | cm.setAttribute("centery", QString::number(center[1])); |
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33 | cm.setAttribute("centerz", QString::number(center[2])); |
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34 | cm.setAttribute("rotx", QString::number(rot[0])); |
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35 | cm.setAttribute("roty", QString::number(rot[1])); |
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36 | cm.setAttribute("rotz", QString::number(rot[2])); |
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37 | cm.setAttribute("rotw", QString::number(rot[3])); |
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38 | cm.setAttribute("distance", QString::number(distance)); |
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39 | return cm; |
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40 | } |
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41 | |
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42 | QGLViewerWidget::QGLViewerWidget(QWidget* pParent, const QGLWidget* pShareWidget, Qt::WindowFlags f) : QGLWidget(pParent, pShareWidget, f) |
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43 | { |
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44 | m_bPerspective = true; |
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45 | m_fovy = 45.0f; |
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46 | m_znear = 0.01f; |
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47 | m_zfar = 100.0f; |
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48 | |
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49 | m_bInertia = true; |
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50 | m_animX = 0.0f; |
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51 | m_animY = 0.0f; |
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52 | m_bAnimating = false; |
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53 | |
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54 | m_clearColor = QColor(64, 64, 64); |
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55 | m_sceneSize = 10.0f; |
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56 | m_bGridVisible = false; |
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57 | m_bAxisVisible = false; |
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58 | m_gridSize = 10.0f; |
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59 | m_gridSubdiv = 10; |
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60 | |
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61 | viewAll(); |
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62 | |
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63 | m_timer.setInterval(30); |
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64 | connect(&m_timer, SIGNAL(timeout()), this, SLOT(timeout())); |
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65 | m_timer.start(); |
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66 | |
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67 | setFocusPolicy(Qt::StrongFocus); |
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68 | } |
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69 | |
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70 | void QGLViewerWidget::setView(const gmtl::Vec3f& center, const gmtl::Quatf& rot, float distance) |
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71 | { |
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72 | m_center = center; |
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73 | m_rot = rot; |
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74 | m_distance = distance; |
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75 | m_matrix = makeTrans<Matrix44f>(m_center) * makeRot<Matrix44f>(m_rot) * makeTrans<Matrix44f>(Vec3f(0.0f, 0.0f, m_distance)); |
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76 | invert(m_matrix); |
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77 | |
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78 | emit cameraChanged(center, rot, distance); |
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79 | } |
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80 | |
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81 | void QGLViewerWidget::init() |
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82 | { |
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83 | } |
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84 | |
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85 | void QGLViewerWidget::draw() |
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86 | { |
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87 | } |
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88 | |
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89 | void QGLViewerWidget::idle() |
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90 | { |
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91 | } |
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92 | |
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93 | void QGLViewerWidget::stop() |
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94 | { |
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95 | m_pivotCenter = m_center; |
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96 | m_pivotRot = m_rot; |
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97 | m_pivotDistance = m_distance; |
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98 | m_pivotOrthoScale = m_orthoScale; |
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99 | m_animX = 0.0f; |
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100 | m_animY = 0.0f; |
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101 | m_bAnimating = false; |
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102 | } |
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103 | |
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104 | void QGLViewerWidget::centerView() |
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105 | { |
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106 | stop(); |
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107 | m_center = Vec3f(0.0f, 0.0f, 0.0f); |
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108 | m_rot = Quatf(); |
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109 | m_distance = 0.0f; |
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110 | m_orthoScale = 0.25f; |
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111 | setView(m_center, m_rot, m_distance); |
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112 | updateGL(); |
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113 | } |
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114 | |
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115 | void QGLViewerWidget::viewAll() |
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116 | { |
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117 | stop(); |
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118 | m_center = Vec3f(0.0f, 0.0f, 0.0f); |
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119 | if (m_bPerspective) |
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120 | m_distance = m_sceneSize * 0.5f; |
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121 | else |
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122 | m_distance = 0.0f; |
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123 | m_orthoScale = 0.25f; |
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124 | setView(m_center, m_rot, m_distance); |
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125 | updateGL(); |
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126 | } |
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127 | |
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128 | void QGLViewerWidget::drawGrid() |
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129 | { |
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130 | if (m_gridSubdiv == 0) |
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131 | return; |
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132 | |
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133 | glPushAttrib(GL_ALL_ATTRIB_BITS); |
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134 | glDisable(GL_TEXTURE_2D); |
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135 | glDisable(GL_LIGHTING); |
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136 | glDisable(GL_BLEND); |
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137 | glEnable(GL_DEPTH_TEST); |
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138 | glLineWidth(1.0f); |
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139 | glColor4f(0.5f, 0.5f, 0.5f, 1.0f); |
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140 | glBegin(GL_LINES); |
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141 | for (int x=0; x<m_gridSubdiv+1; ++x) |
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142 | { |
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143 | glVertex3f(-m_gridSize/2.0f+m_gridSize/m_gridSubdiv*x, 0.0f, -m_gridSize/2.0f); |
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144 | glVertex3f(-m_gridSize/2.0f+m_gridSize/m_gridSubdiv*x, 0.0f, m_gridSize/2.0f); |
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145 | } |
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146 | for (int y=0; y<m_gridSubdiv+1; ++y) |
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147 | { |
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148 | glVertex3f(-m_gridSize/2.0f, 0.0f, -m_gridSize/2.0f+m_gridSize/m_gridSubdiv*y); |
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149 | glVertex3f( m_gridSize/2.0f, 0.0f, -m_gridSize/2.0f+m_gridSize/m_gridSubdiv*y); |
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150 | } |
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151 | glEnd(); |
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152 | glPopAttrib(); |
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153 | } |
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154 | |
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155 | void QGLViewerWidget::drawAxis() |
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156 | { |
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157 | glPushAttrib(GL_ALL_ATTRIB_BITS); |
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158 | glDisable(GL_TEXTURE_2D); |
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159 | glDisable(GL_LIGHTING); |
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160 | glDisable(GL_BLEND); |
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161 | glEnable(GL_DEPTH_TEST); |
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162 | glLineWidth(3.0f); |
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163 | glColor4f(1.0f, 0.0f, 0.0f, 1.0f); |
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164 | glBegin(GL_LINES); |
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165 | glVertex3f(0.0f, 0.0f, 0.0f); |
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166 | glVertex3f(m_gridSize*0.6f, 0.0f, 0.0f); |
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167 | glEnd(); |
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168 | glColor4f(0.0f, 1.0f, 0.0f, 1.0f); |
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169 | glBegin(GL_LINES); |
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170 | glVertex3f(0.0f, 0.0f, 0.0f); |
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171 | glVertex3f(0.0f, m_gridSize*0.6f, 0.0f); |
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172 | glEnd(); |
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173 | glColor4f(0.0f, 0.0f, 1.0f, 1.0f); |
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174 | glBegin(GL_LINES); |
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175 | glVertex3f(0.0f, 0.0f, 0.0f); |
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176 | glVertex3f(0.0f, 0.0f, m_gridSize*0.6f); |
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177 | glEnd(); |
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178 | glPopAttrib(); |
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179 | } |
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180 | |
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181 | void QGLViewerWidget::initializeGL() |
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182 | { |
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183 | init(); |
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184 | } |
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185 | |
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186 | void QGLViewerWidget::paintGL() |
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187 | { |
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188 | glViewport(0, 0, width(), height()); |
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189 | |
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190 | glClearColor((float)m_clearColor.red() / 255.0f, |
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191 | (float)m_clearColor.green() / 255.0f, |
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192 | (float)m_clearColor.blue() / 255.0f, |
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193 | 1.0f); |
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194 | |
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195 | glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
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196 | |
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197 | glMatrixMode(GL_PROJECTION); |
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198 | glLoadIdentity(); |
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199 | |
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200 | float aspect = 1.0f; |
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201 | if (height() > 0) |
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202 | aspect = (float)width()/height(); |
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203 | if (m_bPerspective) |
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204 | gluPerspective(m_fovy, aspect, m_znear, m_zfar); |
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205 | else |
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206 | { |
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207 | float size = m_sceneSize * m_orthoScale; |
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208 | glOrtho(-size*aspect, size*aspect, -size, size, -m_sceneSize*4.0f, m_sceneSize*4.0f); |
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209 | } |
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210 | |
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211 | glMatrixMode(GL_MODELVIEW); |
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212 | glLoadMatrixf(m_matrix.getData()); |
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213 | |
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214 | glEnable(GL_LIGHTING); |
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215 | glEnable(GL_LIGHT0); |
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216 | Vec3f pos = Vec3f(1.0f, 1.0f, 1.0f); |
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217 | if (!isnan(m_rot[0])) |
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218 | pos = m_rot * pos; |
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219 | GLfloat lposition[] = { pos[0], pos[1], pos[2], 0.0f }; |
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220 | GLfloat lambient[] = { 0.1f, 0.1f, 0.1f, 1.0f }; |
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221 | GLfloat ldiffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f }; |
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222 | glLightfv(GL_LIGHT0, GL_POSITION, lposition); |
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223 | glLightfv(GL_LIGHT0, GL_AMBIENT, lambient); |
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224 | glLightfv(GL_LIGHT0, GL_DIFFUSE, ldiffuse); |
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225 | |
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226 | glEnable(GL_DEPTH_TEST); |
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227 | glEnable(GL_COLOR_MATERIAL); |
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228 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
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229 | |
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230 | draw(); |
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231 | |
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232 | glDisable(GL_LIGHTING); |
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233 | |
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234 | if (m_bGridVisible) |
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235 | drawGrid(); |
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236 | |
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237 | if (m_bAxisVisible) |
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238 | drawAxis(); |
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239 | |
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240 | glFlush(); |
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241 | } |
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242 | |
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243 | void QGLViewerWidget::mousePressEvent(QMouseEvent* pEvent) |
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244 | { |
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245 | m_timer.stop(); |
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246 | |
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247 | stop(); |
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248 | |
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249 | m_lastMousePos = pEvent->pos(); |
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250 | m_lastTime = QTime::currentTime(); |
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251 | |
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252 | setMouseTracking(true); |
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253 | } |
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254 | |
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255 | void QGLViewerWidget::mouseMoveEvent(QMouseEvent* pEvent) |
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256 | { |
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257 | if (m_bPerspective && (pEvent->buttons() & Qt::LeftButton)) |
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258 | { |
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259 | float delta = (float)m_lastTime.msecsTo(QTime::currentTime()) / 1000.0f; |
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260 | float deltaX = ((float)(pEvent->x()-m_lastMousePos.x())/width()*90.0f) / 180.0f * Math::PI; |
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261 | float deltaY = ((float)(pEvent->y()-m_lastMousePos.y())/height()*90.0f) / 180.0f * Math::PI; |
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262 | if (delta != 0.0f && (fabs(deltaX / delta) > INERTIA_THRESHOLD || fabs(deltaY / delta) > INERTIA_THRESHOLD)) |
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263 | { |
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264 | m_animX = deltaX / delta; |
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265 | m_animY = deltaY / delta; |
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266 | float length = sqrt(m_animX*m_animX+m_animY*m_animY); |
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267 | if (length > INERTIA_MAX) |
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268 | { |
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269 | m_animX = m_animX / length * INERTIA_MAX; |
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270 | m_animY = m_animY / length * INERTIA_MAX; |
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271 | } |
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272 | } |
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273 | else |
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274 | { |
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275 | m_animX = 0.0f; |
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276 | m_animY = 0.0f; |
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277 | } |
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278 | m_rot = m_pivotRot * make<Quatf>(AxisAnglef(-deltaX, Vec3f(0.0f, 1.0f, 0.0f))) * |
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279 | make<Quatf>(AxisAnglef(-deltaY, Vec3f(1.0f, 0.0f, 0.0f))); |
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280 | } |
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281 | else if (pEvent->buttons() & Qt::MidButton || |
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282 | (!m_bPerspective && pEvent->buttons() & Qt::LeftButton)) |
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283 | { |
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284 | float deltaX = (float)(pEvent->x()-m_lastMousePos.x())/width(); |
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285 | float deltaY = (float)(pEvent->y()-m_lastMousePos.y())/height(); |
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286 | Vec3f panX = m_rot * Vec3f(-deltaX, 0.0f, 0.0f); |
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287 | Vec3f panY = m_rot * Vec3f(0.0f, deltaY, 0.0f); |
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288 | m_center = m_pivotCenter + panX + panY; |
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289 | } |
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290 | else if (m_bPerspective && (pEvent->buttons() & Qt::RightButton)) |
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291 | { |
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292 | if (m_distance > 0.0f) |
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293 | { |
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294 | m_distance = m_pivotDistance - m_pivotDistance * (float)(pEvent->y()-m_lastMousePos.y())/height() * 1.0f; |
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295 | if (m_distance < m_znear*2.0f) |
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296 | m_distance = m_znear*2.0f; |
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297 | } |
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298 | } |
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299 | else if (!m_bPerspective && (pEvent->buttons() & Qt::RightButton)) |
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300 | { |
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301 | m_orthoScale = m_pivotOrthoScale - m_pivotOrthoScale * (float)(pEvent->y()-m_lastMousePos.y())/height() * 1.0f; |
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302 | if (m_orthoScale < 0.01f) |
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303 | m_orthoScale = 0.01f; |
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304 | } |
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305 | |
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306 | setView(m_center, m_rot, m_distance); |
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307 | m_lastTime = QTime::currentTime(); |
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308 | |
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309 | updateGL(); |
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310 | } |
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311 | |
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312 | void QGLViewerWidget::mouseReleaseEvent(QMouseEvent* pEvent) |
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313 | { |
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314 | Q_UNUSED(pEvent); |
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315 | |
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316 | if (m_lastTime.msecsTo(QTime::currentTime()) > 50 || !m_bInertia) |
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317 | { |
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318 | m_animX = 0.0f; |
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319 | m_animY = 0.0f; |
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320 | m_bAnimating = false; |
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321 | } |
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322 | if (m_animX != 0.0f || m_animY != 0.0f) |
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323 | m_bAnimating = true; |
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324 | |
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325 | setMouseTracking(false); |
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326 | |
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327 | m_timer.start(); |
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328 | } |
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329 | |
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330 | void QGLViewerWidget::wheelEvent(QWheelEvent* pEvent) |
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331 | { |
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332 | if (m_bPerspective) |
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333 | { |
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334 | if (pEvent->delta() > 0.0f) |
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335 | setView(m_center, m_rot, m_distance * 1.1f); |
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336 | else |
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337 | setView(m_center, m_rot, m_distance / 1.1f); |
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338 | } |
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339 | else |
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340 | { |
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341 | if (pEvent->delta() > 0.0f) |
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342 | m_orthoScale *= 1.1f; |
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343 | else |
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344 | m_orthoScale /= 1.1f; |
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345 | if (m_orthoScale < 0.01f) |
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346 | m_orthoScale = 0.01f; |
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347 | } |
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348 | |
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349 | updateGL(); |
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350 | } |
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351 | |
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352 | void QGLViewerWidget::keyReleaseEvent(QKeyEvent* pEvent) |
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353 | { |
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354 | QGLWidget::keyReleaseEvent(pEvent); |
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355 | |
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356 | switch (pEvent->key()) |
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357 | { |
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358 | case Qt::Key_A: |
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359 | setAxisVisible(!m_bAxisVisible); |
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360 | updateGL(); |
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361 | break; |
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362 | case Qt::Key_G: |
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363 | setGridVisible(!m_bGridVisible); |
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364 | updateGL(); |
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365 | break; |
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366 | case Qt::Key_R: |
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367 | viewAll(); |
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368 | break; |
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369 | default: |
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370 | return; |
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371 | } |
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372 | } |
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373 | |
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374 | void QGLViewerWidget::timeout() |
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375 | { |
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376 | if (m_bAnimating) |
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377 | { |
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378 | float delta = (float)m_lastTime.msecsTo(QTime::currentTime()) / 1000.0f; |
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379 | Quatf deltaRot = |
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380 | make<Quatf>(AxisAnglef(-m_animX*delta, Vec3f(0.0f, 1.0f, 0.0f))) * |
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381 | make<Quatf>(AxisAnglef(-m_animY*delta, Vec3f(1.0f, 0.0f, 0.0f))); |
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382 | Quatf rot = m_rot * deltaRot; |
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383 | if (!isnan(rot[0])) |
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384 | setView(m_center, rot, m_distance); |
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385 | m_lastTime = QTime::currentTime(); |
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386 | } |
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387 | |
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388 | idle(); |
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389 | |
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390 | if (m_bAnimating) |
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391 | updateGL(); |
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392 | } |
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393 | |
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394 | void QGLViewerWidget::initFromDOMElement(const QDomElement& element) |
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395 | { |
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396 | if (!element.isNull()) |
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397 | { |
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398 | QDomElement camera = element.firstChildElement("Camera"); |
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399 | dom2vp(camera, m_center, m_rot, m_distance); |
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400 | m_bPerspective = (element.attribute("perspective", "true")=="true"); |
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401 | m_fovy = element.attribute("fovy", QString::number(45.0f)).toFloat(); |
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402 | m_orthoScale = element.attribute("orthoScale", QString::number(0.25f)).toFloat(); |
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403 | m_znear = element.attribute("near", QString::number(0.01f)).toFloat(); |
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404 | m_zfar = element.attribute("far", QString::number(100.0f)).toFloat(); |
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405 | m_bInertia = (element.attribute("inertia", "true")=="true"); |
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406 | m_clearColor = QColor(element.attribute("clearColor", QColor(64, 64, 64).name())); |
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407 | m_bGridVisible = (element.attribute("grid", "true")=="true"); |
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408 | m_bAxisVisible = (element.attribute("axis", "true")=="true"); |
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409 | m_sceneSize = element.attribute("sceneSize", QString::number(10.0f)).toFloat(); |
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410 | if (!parentWidget()) |
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411 | { |
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412 | move(element.attribute("x", QString::number(x())).toInt(), element.attribute("y", QString::number(y())).toInt()); |
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413 | resize(element.attribute("width", QString::number(width())).toInt(), element.attribute("height", QString::number(height())).toInt()); |
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414 | } |
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415 | setView(m_center, m_rot, m_distance); |
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416 | stop(); |
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417 | } |
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418 | } |
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419 | |
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420 | QDomElement QGLViewerWidget::domElement(const QString& name, QDomDocument& doc) const |
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421 | { |
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422 | QDomElement de = doc.createElement(name); |
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423 | de.appendChild(vp2dom(doc, m_center, m_rot, m_distance)); |
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424 | de.setAttribute("perspective", m_bPerspective?"true":"false"); |
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425 | de.setAttribute("fovy", m_fovy); |
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426 | de.setAttribute("orthoScale", m_orthoScale); |
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427 | de.setAttribute("near", m_znear); |
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428 | de.setAttribute("far", m_zfar); |
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429 | de.setAttribute("inertia", m_bInertia?"true":"false"); |
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430 | de.setAttribute("clearColor", m_clearColor.name()); |
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431 | de.setAttribute("grid", m_bGridVisible?"true":"false"); |
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432 | de.setAttribute("axis", m_bAxisVisible?"true":"false"); |
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433 | de.setAttribute("sceneSize", m_sceneSize); |
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434 | if (!parentWidget()) |
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435 | { |
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436 | de.setAttribute("x", x()); |
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437 | de.setAttribute("y", y()); |
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438 | de.setAttribute("width", width()); |
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439 | de.setAttribute("height", height()); |
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440 | } |
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441 | return de; |
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442 | } |
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