1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4ViewParameters.cc,v 1.28 2006/09/19 16:02:31 allison Exp $ |
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28 | // GEANT4 tag $Name: geant4-08-02-patch-01 $ |
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29 | // |
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30 | // |
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31 | // John Allison 19th July 1996 |
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32 | // View parameters and options. |
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33 | |
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34 | #include "G4ViewParameters.hh" |
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35 | |
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36 | #include "G4VisManager.hh" |
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37 | #include "G4UnitsTable.hh" |
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38 | #include "G4ios.hh" |
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39 | |
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40 | G4ViewParameters::G4ViewParameters (): |
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41 | fDrawingStyle (wireframe), |
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42 | fAuxEdgeVisible (false), |
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43 | fRepStyle (polyhedron), |
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44 | fCulling (true), |
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45 | fCullInvisible (true), |
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46 | fDensityCulling (false), |
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47 | fVisibleDensity (0.01 * g / cm3), |
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48 | fCullCovered (false), |
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49 | fSection (false), |
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50 | fSectionPlane (), |
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51 | fCutawayMode (cutawayUnion), |
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52 | fCutawayPlanes (), |
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53 | fExplodeFactor (1.), |
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54 | fNoOfSides (24), |
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55 | fViewpointDirection (G4Vector3D (0., 0., 1.)), // On z-axis. |
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56 | fUpVector (G4Vector3D (0., 1., 0.)), // y-axis up. |
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57 | fFieldHalfAngle (0.), // Orthogonal projection. |
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58 | fZoomFactor (1.), |
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59 | fScaleFactor (G4Vector3D (1., 1., 1.)), |
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60 | fCurrentTargetPoint (), |
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61 | fDolly (0.), |
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62 | fLightsMoveWithCamera (false), |
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63 | fRelativeLightpointDirection (G4Vector3D (1., 1., 1.)), |
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64 | fActualLightpointDirection (G4Vector3D (1., 1., 1.)), |
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65 | fDefaultVisAttributes (), |
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66 | fDefaultTextVisAttributes (G4Colour (0., 0., 1.)), |
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67 | fDefaultMarker (), |
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68 | fGlobalMarkerScale (1.), |
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69 | fGlobalLineWidthScale (1.), |
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70 | fMarkerNotHidden (true), |
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71 | fWindowSizeHintX (600), |
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72 | fWindowSizeHintY (600), |
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73 | fAutoRefresh (false), |
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74 | fBackgroundColour (G4Colour(0.,0.,0.)) // Black |
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75 | { |
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76 | fDefaultMarker.SetScreenSize (5.); |
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77 | // Markers are 5 pixels "overall" size, i.e., diameter. |
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78 | } |
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79 | |
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80 | G4ViewParameters::~G4ViewParameters () {} |
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81 | |
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82 | void G4ViewParameters::MultiplyScaleFactor |
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83 | (const G4Vector3D& scaleFactorMultiplier) { |
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84 | fScaleFactor.setX(fScaleFactor.x() * scaleFactorMultiplier.x()); |
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85 | fScaleFactor.setY(fScaleFactor.y() * scaleFactorMultiplier.y()); |
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86 | fScaleFactor.setZ(fScaleFactor.z() * scaleFactorMultiplier.z()); |
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87 | } |
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88 | |
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89 | G4Vector3D& G4ViewParameters::GetActualLightpointDirection () { |
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90 | SetViewAndLights (fViewpointDirection); |
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91 | return fActualLightpointDirection; |
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92 | } |
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93 | |
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94 | // Useful quantities - begin snippet. |
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95 | // Here Follow functions to evaluate the above algorithms as a |
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96 | // function of the radius of the Bounding Sphere of the object being |
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97 | // viewed. Call them in the order given - for efficiency, later |
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98 | // functions depend on the results of earlier ones (Store the |
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99 | // results of earlier functions in your own temporary variables - |
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100 | // see, for example, G4OpenGLView::SetView ().) |
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101 | |
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102 | G4double G4ViewParameters::GetCameraDistance (G4double radius) const { |
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103 | G4double cameraDistance; |
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104 | if (fFieldHalfAngle == 0.) { |
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105 | cameraDistance = radius; |
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106 | } |
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107 | else { |
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108 | cameraDistance = radius / std::sin (fFieldHalfAngle) - fDolly; |
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109 | } |
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110 | return cameraDistance; |
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111 | } |
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112 | |
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113 | G4double G4ViewParameters::GetNearDistance (G4double cameraDistance, |
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114 | G4double radius) const { |
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115 | const G4double small = 1.e-6 * radius; |
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116 | G4double nearDistance = cameraDistance - radius; |
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117 | if (nearDistance < small) nearDistance = small; |
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118 | return nearDistance; |
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119 | } |
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120 | |
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121 | G4double G4ViewParameters::GetFarDistance (G4double cameraDistance, |
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122 | G4double nearDistance, |
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123 | G4double radius) const { |
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124 | G4double farDistance = cameraDistance + radius; |
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125 | if (farDistance < nearDistance) farDistance = nearDistance; |
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126 | return farDistance; |
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127 | } |
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128 | |
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129 | G4double G4ViewParameters::GetFrontHalfHeight (G4double nearDistance, |
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130 | G4double radius) const { |
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131 | G4double frontHalfHeight; |
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132 | if (fFieldHalfAngle == 0.) { |
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133 | frontHalfHeight = radius / fZoomFactor; |
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134 | } |
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135 | else { |
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136 | frontHalfHeight = nearDistance * std::tan (fFieldHalfAngle) / fZoomFactor; |
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137 | } |
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138 | return frontHalfHeight; |
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139 | } |
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140 | // Useful quantities - end snippet. |
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141 | |
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142 | void G4ViewParameters::AddCutawayPlane (const G4Plane3D& cutawayPlane) { |
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143 | if (fCutawayPlanes.size () < 3 ) { |
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144 | fCutawayPlanes.push_back (cutawayPlane); |
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145 | } |
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146 | else { |
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147 | G4cout << |
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148 | "ERROR: G4ViewParameters::AddCutawayPlane:" |
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149 | "\n A maximum of 3 cutaway planes supported." << G4endl; |
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150 | } |
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151 | } |
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152 | |
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153 | void G4ViewParameters::ChangeCutawayPlane |
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154 | (size_t index, const G4Plane3D& cutawayPlane) { |
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155 | if (index >= fCutawayPlanes.size()) { |
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156 | G4cout << |
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157 | "ERROR: G4ViewParameters::ChangeCutawayPlane:" |
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158 | "\n Plane " << index << " does not exist." << G4endl; |
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159 | } else { |
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160 | fCutawayPlanes[index] = cutawayPlane; |
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161 | } |
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162 | } |
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163 | |
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164 | void G4ViewParameters::SetVisibleDensity (G4double visibleDensity) { |
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165 | const G4double reasonableMaximum = 10.0 * g / cm3; |
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166 | if (visibleDensity < 0) { |
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167 | G4cout << "G4ViewParameters::SetVisibleDensity: attempt to set negative " |
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168 | "density - ignored." << G4endl; |
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169 | } |
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170 | else { |
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171 | if (visibleDensity > reasonableMaximum) { |
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172 | G4cout << "G4ViewParameters::SetVisibleDensity: density > " |
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173 | << G4BestUnit (reasonableMaximum, "Volumic Mass") |
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174 | << " - did you mean this?" |
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175 | << G4endl; |
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176 | } |
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177 | fVisibleDensity = visibleDensity; |
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178 | } |
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179 | } |
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180 | |
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181 | G4int G4ViewParameters::SetNoOfSides (G4int nSides) { |
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182 | const G4int nSidesMin = 12; |
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183 | if (nSides < nSidesMin) { |
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184 | nSides = nSidesMin; |
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185 | G4cout << "G4ViewParameters::SetNoOfSides: attempt to set the" |
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186 | "\nnumber of sides per circle < " << nSidesMin |
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187 | << "; forced to " << nSides << G4endl; |
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188 | } |
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189 | fNoOfSides = nSides; |
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190 | return fNoOfSides; |
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191 | } |
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192 | |
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193 | void G4ViewParameters::SetViewAndLights |
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194 | (const G4Vector3D& viewpointDirection) { |
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195 | |
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196 | fViewpointDirection = viewpointDirection; |
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197 | |
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198 | // If the requested viewpoint direction is parallel to the up |
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199 | // vector, the orientation of the view is undefined... |
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200 | if (fViewpointDirection.unit() * fUpVector.unit() > .9999) { |
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201 | G4cout << |
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202 | "WARNING: Viewpoint direction is very close to the up vector direction." |
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203 | "\n Consider setting the up vector to obtain definable behaviour." |
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204 | << G4endl; |
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205 | } |
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206 | |
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207 | // Move the lights too if requested... |
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208 | if (fLightsMoveWithCamera) { |
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209 | G4Vector3D zprime = fViewpointDirection.unit (); |
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210 | G4Vector3D xprime = (fUpVector.cross (zprime)).unit (); |
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211 | G4Vector3D yprime = zprime.cross (xprime); |
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212 | fActualLightpointDirection = |
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213 | fRelativeLightpointDirection.x () * xprime + |
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214 | fRelativeLightpointDirection.y () * yprime + |
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215 | fRelativeLightpointDirection.x () * zprime; |
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216 | } else { |
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217 | fActualLightpointDirection = fRelativeLightpointDirection; |
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218 | } |
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219 | } |
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220 | |
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221 | void G4ViewParameters::SetLightpointDirection |
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222 | (const G4Vector3D& lightpointDirection) { |
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223 | fRelativeLightpointDirection = lightpointDirection; |
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224 | SetViewAndLights (fViewpointDirection); |
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225 | } |
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226 | |
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227 | void G4ViewParameters::SetPan (G4double right, G4double up) { |
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228 | G4Vector3D unitRight = (fUpVector.cross (fViewpointDirection)).unit(); |
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229 | G4Vector3D unitUp = (fViewpointDirection.cross (unitRight)).unit(); |
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230 | fCurrentTargetPoint = right * unitRight + up * unitUp; |
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231 | } |
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232 | |
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233 | void G4ViewParameters::IncrementPan (G4double right, G4double up) { |
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234 | G4Vector3D unitRight = (fUpVector.cross (fViewpointDirection)).unit(); |
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235 | G4Vector3D unitUp = (fViewpointDirection.cross (unitRight)).unit(); |
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236 | fCurrentTargetPoint += right * unitRight + up * unitUp; |
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237 | } |
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238 | |
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239 | void G4ViewParameters::PrintDifferences (const G4ViewParameters& v) const { |
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240 | |
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241 | // Put performance-sensitive parameters first. |
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242 | if ( |
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243 | // This first to optimise spin, etc. |
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244 | (fViewpointDirection != v.fViewpointDirection) || |
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245 | |
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246 | // No particular order from here on. |
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247 | (fDrawingStyle != v.fDrawingStyle) || |
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248 | (fAuxEdgeVisible != v.fAuxEdgeVisible) || |
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249 | (fRepStyle != v.fRepStyle) || |
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250 | (fCulling != v.fCulling) || |
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251 | (fCullInvisible != v.fCullInvisible) || |
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252 | (fDensityCulling != v.fDensityCulling) || |
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253 | (fVisibleDensity != v.fVisibleDensity) || |
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254 | (fCullCovered != v.fCullCovered) || |
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255 | (fSection != v.fSection) || |
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256 | (fNoOfSides != v.fNoOfSides) || |
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257 | (fUpVector != v.fUpVector) || |
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258 | (fFieldHalfAngle != v.fFieldHalfAngle) || |
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259 | (fZoomFactor != v.fZoomFactor) || |
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260 | (fScaleFactor != v.fScaleFactor) || |
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261 | (fCurrentTargetPoint != v.fCurrentTargetPoint) || |
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262 | (fDolly != v.fDolly) || |
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263 | (fRelativeLightpointDirection != v.fRelativeLightpointDirection) || |
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264 | (fLightsMoveWithCamera != v.fLightsMoveWithCamera) || |
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265 | (fDefaultVisAttributes != v.fDefaultVisAttributes) || |
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266 | (fDefaultTextVisAttributes != v.fDefaultTextVisAttributes) || |
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267 | (fDefaultMarker != v.fDefaultMarker) || |
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268 | (fGlobalMarkerScale != v.fGlobalMarkerScale) || |
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269 | (fGlobalLineWidthScale != v.fGlobalLineWidthScale) || |
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270 | (fMarkerNotHidden != v.fMarkerNotHidden) || |
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271 | (fWindowSizeHintX != v.fWindowSizeHintX) || |
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272 | (fWindowSizeHintY != v.fWindowSizeHintY) || |
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273 | (fXGeometryString != v.fXGeometryString) || |
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274 | (fAutoRefresh != v.fAutoRefresh) || |
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275 | (fBackgroundColour != v.fBackgroundColour)) |
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276 | G4cout << "Difference in 1st batch." << G4endl; |
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277 | |
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278 | if (fSection) { |
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279 | if (!(fSectionPlane == v.fSectionPlane)) |
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280 | G4cout << "Difference in section planes batch." << G4endl; |
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281 | } |
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282 | |
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283 | if (IsCutaway()) { |
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284 | if (fCutawayPlanes.size () != v.fCutawayPlanes.size ()) { |
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285 | G4cout << "Difference in no of cutaway planes." << G4endl; |
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286 | } |
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287 | else { |
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288 | for (size_t i = 0; i < fCutawayPlanes.size (); i++) { |
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289 | if (!(fCutawayPlanes[i] == v.fCutawayPlanes[i])) |
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290 | G4cout << "Difference in cutaway plane no. " << i << G4endl; |
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291 | } |
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292 | } |
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293 | } |
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294 | |
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295 | if (IsExplode()) { |
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296 | if (fExplodeFactor != v.fExplodeFactor) |
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297 | G4cout << "Difference in explode factor." << G4endl; |
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298 | if (fExplodeCentre != v.fExplodeCentre) |
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299 | G4cout << "Difference in explode centre." << G4endl; |
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300 | } |
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301 | } |
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302 | |
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303 | std::ostream& operator << (std::ostream& os, |
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304 | const G4ViewParameters::DrawingStyle& style) { |
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305 | switch (style) { |
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306 | case G4ViewParameters::wireframe: |
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307 | os << "wireframe"; break; |
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308 | case G4ViewParameters::hlr: |
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309 | os << "hlr - hidden lines removed"; break; |
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310 | case G4ViewParameters::hsr: |
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311 | os << "hsr - hidden surfaces removed"; break; |
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312 | case G4ViewParameters::hlhsr: |
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313 | os << "hlhsr - hidden line, hidden surface removed"; break; |
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314 | default: os << "unrecognised"; break; |
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315 | } |
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316 | return os; |
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317 | } |
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318 | |
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319 | std::ostream& operator << (std::ostream& os, const G4ViewParameters& v) { |
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320 | os << "View parameters and options:"; |
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321 | |
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322 | os << "\n Drawing style: " << v.fDrawingStyle; |
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323 | |
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324 | os << "\n Auxiliary edges: "; |
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325 | if (!v.fAuxEdgeVisible) os << "in"; |
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326 | os << "visible"; |
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327 | |
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328 | os << "\n Representation style: "; |
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329 | switch (v.fRepStyle) { |
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330 | case G4ViewParameters::polyhedron: |
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331 | os << "polyhedron"; break; |
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332 | case G4ViewParameters::nurbs: |
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333 | os << "nurbs"; break; |
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334 | default: os << "unrecognised"; break; |
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335 | } |
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336 | |
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337 | os << "\n Culling: "; |
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338 | if (v.fCulling) os << "on"; |
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339 | else os << "off"; |
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340 | |
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341 | os << "\n Culling invisible objects: "; |
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342 | if (v.fCullInvisible) os << "on"; |
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343 | else os << "off"; |
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344 | |
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345 | os << "\n Density culling: "; |
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346 | if (v.fDensityCulling) { |
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347 | os << "on - invisible if density less than " |
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348 | << v.fVisibleDensity / (1. * g / cm3) << " g cm^-3"; |
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349 | } |
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350 | else os << "off"; |
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351 | |
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352 | os << "\n Culling daughters covered by opaque mothers: "; |
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353 | if (v.fCullCovered) os << "on"; |
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354 | else os << "off"; |
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355 | |
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356 | os << "\n Section flag: "; |
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357 | if (v.fSection) os << "true, section/cut plane: " << v.fSectionPlane; |
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358 | else os << "false"; |
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359 | |
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360 | if (v.IsCutaway()) { |
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361 | os << "\n Cutaway planes: "; |
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362 | for (size_t i = 0; i < v.fCutawayPlanes.size (); i++) { |
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363 | os << ' ' << v.fCutawayPlanes[i]; |
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364 | } |
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365 | } |
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366 | else { |
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367 | os << "\n No cutaway planes"; |
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368 | } |
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369 | |
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370 | os << "\n Explode factor: " << v.fExplodeFactor |
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371 | << " about centre: " << v.fExplodeCentre; |
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372 | |
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373 | os << "\n No. of sides used in circle polygon approximation: " |
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374 | << v.fNoOfSides; |
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375 | |
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376 | os << "\n Viewpoint direction: " << v.fViewpointDirection; |
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377 | |
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378 | os << "\n Up vector: " << v.fUpVector; |
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379 | |
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380 | os << "\n Field half angle: " << v.fFieldHalfAngle; |
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381 | |
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382 | os << "\n Zoom factor: " << v.fZoomFactor; |
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383 | |
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384 | os << "\n Scale factor: " << v.fScaleFactor; |
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385 | |
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386 | os << "\n Current target point: " << v.fCurrentTargetPoint; |
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387 | |
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388 | os << "\n Dolly distance: " << v.fDolly; |
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389 | |
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390 | os << "\n Light "; |
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391 | if (v.fLightsMoveWithCamera) os << "moves"; |
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392 | else os << "does not move"; |
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393 | os << " with camera"; |
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394 | |
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395 | os << "\n Relative lightpoint direction: " |
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396 | << v.fRelativeLightpointDirection; |
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397 | |
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398 | os << "\n Actual lightpoint direction: " |
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399 | << v.fActualLightpointDirection; |
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400 | |
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401 | os << "\n Derived parameters for standard view of object of unit radius:"; |
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402 | G4ViewParameters tempVP = v; |
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403 | tempVP.fDolly = 0.; |
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404 | tempVP.fZoomFactor = 1.; |
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405 | const G4double radius = 1.; |
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406 | const G4double cameraDistance = tempVP.GetCameraDistance (radius); |
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407 | const G4double nearDistance = |
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408 | tempVP.GetNearDistance (cameraDistance, radius); |
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409 | const G4double farDistance = |
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410 | tempVP.GetFarDistance (cameraDistance, nearDistance, radius); |
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411 | const G4double right = tempVP.GetFrontHalfHeight (nearDistance, radius); |
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412 | os << "\n Camera distance: " << cameraDistance; |
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413 | os << "\n Near distance: " << nearDistance; |
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414 | os << "\n Far distance: " << farDistance; |
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415 | os << "\n Front half height: " << right; |
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416 | |
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417 | os << "\n Default VisAttributes:\n " << v.fDefaultVisAttributes; |
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418 | |
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419 | os << "\n Default TextVisAttributes:\n " << v.fDefaultTextVisAttributes; |
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420 | |
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421 | os << "\n Default marker: " << v.fDefaultMarker; |
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422 | |
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423 | os << "\n Global marker scale: " << v.fGlobalMarkerScale; |
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424 | |
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425 | os << "\n Global lineWidth scale: " << v.fGlobalLineWidthScale; |
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426 | |
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427 | os << "\n Marker "; |
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428 | if (v.fMarkerNotHidden) os << "not "; |
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429 | os << "hidden by surfaces."; |
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430 | |
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431 | os << "\n Window size hint: " |
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432 | << v.fWindowSizeHintX << 'x'<< v.fWindowSizeHintX; |
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433 | |
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434 | os << "\n X geometry string: " << v.fXGeometryString; |
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435 | |
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436 | os << "\n Auto refresh: "; |
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437 | if (v.fAutoRefresh) os << "true"; |
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438 | else os << "false"; |
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439 | |
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440 | os << "\n Background colour: " << v.fBackgroundColour; |
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441 | |
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442 | return os; |
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443 | } |
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444 | |
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445 | G4bool G4ViewParameters::operator != (const G4ViewParameters& v) const { |
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446 | |
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447 | // Put performance-sensitive parameters first. |
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448 | if ( |
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449 | // This first to optimise spin, etc. |
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450 | (fViewpointDirection != v.fViewpointDirection) || |
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451 | |
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452 | // No particular order from here on. |
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453 | (fDrawingStyle != v.fDrawingStyle) || |
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454 | (fAuxEdgeVisible != v.fAuxEdgeVisible) || |
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455 | (fRepStyle != v.fRepStyle) || |
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456 | (fCulling != v.fCulling) || |
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457 | (fCullInvisible != v.fCullInvisible) || |
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458 | (fDensityCulling != v.fDensityCulling) || |
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459 | (fCullCovered != v.fCullCovered) || |
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460 | (fSection != v.fSection) || |
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461 | (IsCutaway() != v.IsCutaway()) || |
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462 | (IsExplode() != v.IsExplode()) || |
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463 | (fNoOfSides != v.fNoOfSides) || |
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464 | (fUpVector != v.fUpVector) || |
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465 | (fFieldHalfAngle != v.fFieldHalfAngle) || |
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466 | (fZoomFactor != v.fZoomFactor) || |
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467 | (fScaleFactor != v.fScaleFactor) || |
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468 | (fCurrentTargetPoint != v.fCurrentTargetPoint) || |
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469 | (fDolly != v.fDolly) || |
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470 | (fRelativeLightpointDirection != v.fRelativeLightpointDirection) || |
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471 | (fLightsMoveWithCamera != v.fLightsMoveWithCamera) || |
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472 | (fDefaultVisAttributes != v.fDefaultVisAttributes) || |
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473 | (fDefaultTextVisAttributes != v.fDefaultTextVisAttributes) || |
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474 | (fDefaultMarker != v.fDefaultMarker) || |
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475 | (fGlobalMarkerScale != v.fGlobalMarkerScale) || |
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476 | (fGlobalLineWidthScale != v.fGlobalLineWidthScale) || |
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477 | (fMarkerNotHidden != v.fMarkerNotHidden) || |
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478 | (fWindowSizeHintX != v.fWindowSizeHintX) || |
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479 | (fWindowSizeHintY != v.fWindowSizeHintY) || |
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480 | (fXGeometryString != v.fXGeometryString) || |
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481 | (fAutoRefresh != v.fAutoRefresh) || |
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482 | (fBackgroundColour != v.fBackgroundColour)) |
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483 | return true; |
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484 | |
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485 | if (fDensityCulling && |
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486 | (fVisibleDensity != v.fVisibleDensity)) return true; |
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487 | |
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488 | if (fSection && |
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489 | (!(fSectionPlane == v.fSectionPlane))) return true; |
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490 | |
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491 | if (IsCutaway()) { |
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492 | if (fCutawayPlanes.size () != v.fCutawayPlanes.size ()) |
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493 | return true; |
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494 | else { |
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495 | for (size_t i = 0; i < fCutawayPlanes.size (); i++) { |
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496 | if (!(fCutawayPlanes[i] == v.fCutawayPlanes[i])) return true; |
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497 | } |
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498 | } |
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499 | } |
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500 | |
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501 | if (IsExplode() && |
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502 | (fExplodeFactor != v.fExplodeFactor) || |
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503 | (fExplodeCentre != v.fExplodeCentre)) return true; |
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504 | |
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505 | return false; |
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506 | } |
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