1 | /* -*-c++-*- osgVisual - Copyright (C) 2009-2011 Torben Dannhauer |
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2 | * |
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3 | * This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under |
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4 | * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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5 | * (at your option) any later version. The full license is in LICENSE file |
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6 | * included with this distribution, and on the openscenegraph.org website. |
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7 | * |
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8 | * osgVisual requires for some proprietary modules a license from the correspondig manufacturer. |
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9 | * You have to aquire licenses for all used proprietary modules. |
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10 | * |
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11 | * This library is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * OpenSceneGraph Public License for more details. |
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15 | */ |
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16 | |
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17 | #include "rampedEllipsoidTechnique.h" |
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18 | |
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19 | |
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20 | rampedEllipsoidTechnique::rampedEllipsoidTechnique() |
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21 | { |
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22 | _height = 0.0; |
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23 | _rampWidthFactor = 0.4; // 10% of ROI is ramp. |
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24 | } |
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25 | |
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26 | rampedEllipsoidTechnique::~rampedEllipsoidTechnique() |
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27 | { |
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28 | } |
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29 | |
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30 | void rampedEllipsoidTechnique::modifyHeightfield(region& modificationROI, osg::HeightField* h, region tileExtends) |
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31 | { |
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32 | OSG_NOTIFY( osg::ALWAYS ) << "rampedEllipsoidTechnique::modifyHeightfield()" << std::endl; |
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33 | //OSG_NOTIFY( osg::ALWAYS ) << "LAT: " << tileExtends._lat_min << " | " << tileExtends._lat_max << std::endl; |
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34 | //OSG_NOTIFY( osg::ALWAYS ) << "LON: " << tileExtends._lon_min << " | " << tileExtends._lon_max << std::endl; |
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35 | |
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36 | // Determine modificationROI without ramp |
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37 | double deltaLatPerSide = modificationROI.delta_lat() * _rampWidthFactor / 2.0; |
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38 | double deltaLonPerSide = modificationROI.delta_lon() * _rampWidthFactor / 2.0; |
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39 | region coreROI = modificationROI; |
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40 | coreROI._lat_min+=deltaLatPerSide; |
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41 | coreROI._lat_max-=deltaLatPerSide; |
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42 | coreROI._lon_min+=deltaLonPerSide; |
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43 | coreROI._lon_max-=deltaLonPerSide; |
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44 | |
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45 | // Calculate colum start/end and row start/end of affected vertices |
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46 | int Y_start=0, Y_startRamp=0, Y_startCore=0, Y_endCore=0, Y_endRamp=0, Y_end=h->getNumRows(); // Lat |
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47 | int X_start=0, X_startRamp=0, X_startCore=0, X_endCore=0, X_endRamp=0, X_end=h->getNumColumns(); // Lon |
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48 | |
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49 | // Lat |
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50 | Y_startRamp = round((modificationROI._lat_min-tileExtends._lat_min) / h->getYInterval()); |
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51 | Y_startCore = round((coreROI._lat_min-tileExtends._lat_min) / h->getYInterval()); |
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52 | Y_endCore = round((coreROI._lat_max-tileExtends._lat_min) / h->getYInterval()); |
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53 | Y_endRamp = round((modificationROI._lat_max-tileExtends._lat_min) / h->getYInterval()); |
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54 | |
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55 | clampValue(Y_startRamp, Y_start, Y_end); |
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56 | clampValue(Y_startCore, Y_start, Y_end); |
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57 | clampValue(Y_endCore, Y_start, Y_end); |
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58 | clampValue(Y_endRamp, Y_start, Y_end); |
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59 | OSG_NOTIFY( osg::ALWAYS ) << "Y_startRamp:" << Y_startRamp << " Y_startCore:" << Y_startCore << " Y_endCore:" << Y_endCore << " Y_endRamp:" << Y_endRamp << std::endl; |
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60 | |
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61 | // Lon |
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62 | X_startRamp = round((modificationROI._lon_min-tileExtends._lon_min) / h->getXInterval()); |
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63 | X_startCore = round((coreROI._lon_min-tileExtends._lon_min) / h->getXInterval()); |
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64 | X_endCore = round((coreROI._lon_max-tileExtends._lon_min) / h->getXInterval()); |
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65 | X_endRamp = round((modificationROI._lon_max-tileExtends._lon_min) / h->getXInterval()); |
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66 | |
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67 | clampValue(X_startRamp, X_start, X_end); |
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68 | clampValue(X_startCore, X_start, X_end); |
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69 | clampValue(X_endCore, X_start, X_end); |
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70 | clampValue(X_endRamp, X_start, X_end); |
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71 | OSG_NOTIFY( osg::ALWAYS ) << "X_startRamp:" << X_startRamp << " X_startCore:" << X_startCore << " X_endCore:" << X_endCore << " X_endRamp:" << X_endRamp << std::endl; |
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72 | |
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73 | // Modify height value of affected vertices in the core ROI |
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74 | for(int x=X_startRamp;x<X_endRamp;x++) |
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75 | { |
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76 | for(int y=Y_startRamp;y<Y_endRamp;y++) |
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77 | { |
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78 | // Calculate vertex position in global coordinate system (lat/lon) |
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79 | double vertex_lat = y*h->getYInterval()+tileExtends._lat_min; |
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80 | double vertex_lon = x*h->getXInterval()+tileExtends._lon_min; |
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81 | // Calculate vertex delta h: h_dest - h_org |
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82 | double height_org = h->getHeight(x,y); |
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83 | double delta_h = _height - height_org; |
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84 | // preset offsetvalue to max and let every region try to lower it... |
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85 | double destination_height = std::numeric_limits<double>::max(); |
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86 | |
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87 | // Calculate vertex height according to the region it is in. |
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88 | if( Y_startCore<=y && y<Y_endCore && X_startCore<=x && x<X_endCore ) // If vertex is inside core: Apply final height |
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89 | { |
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90 | if(_height<destination_height) |
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91 | destination_height = _height; |
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92 | } |
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93 | if(Y_startRamp<=y && y<Y_startCore) // Vertex is inside Y start ramp |
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94 | { |
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95 | double delta_s = abs(modificationROI._lat_min-vertex_lat); |
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96 | double gradient = delta_h/deltaLatPerSide; |
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97 | double dest = delta_s*gradient + height_org; |
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98 | if(dest<destination_height) |
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99 | destination_height = dest; |
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100 | } |
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101 | if(X_startRamp<=x && x<X_startCore) // Vertex is inside X start ramp |
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102 | { |
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103 | double delta_s = abs(modificationROI._lon_min-vertex_lon); |
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104 | double gradient = delta_h/deltaLonPerSide; |
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105 | double dest = delta_s*gradient + height_org; |
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106 | if(dest<destination_height) |
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107 | destination_height = dest; |
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108 | } |
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109 | if(Y_endCore<=y && y<Y_endRamp) // Vertex is inside Y end ramp |
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110 | { |
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111 | double delta_s = abs(modificationROI._lat_max-vertex_lat); |
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112 | double gradient = delta_h/deltaLatPerSide; |
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113 | double dest = delta_s*gradient + height_org; |
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114 | if(dest<destination_height) |
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115 | destination_height = dest; |
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116 | } |
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117 | if (X_endCore<=x && x<X_endRamp) // Vertex is inside X end ramp |
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118 | { |
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119 | double delta_s = abs(modificationROI._lon_max-vertex_lon); |
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120 | double gradient = delta_h/deltaLonPerSide; |
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121 | double dest = delta_s*gradient + height_org; |
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122 | if(dest<destination_height) |
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123 | destination_height = dest; |
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124 | } |
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125 | |
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126 | // Set height to calculated value |
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127 | OSG_NOTIFY( osg::ALWAYS ) << "rampedEllipsoidTechnique: destination_height=" << destination_height << std::endl; |
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128 | h->setHeight( x, y, destination_height); |
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129 | } |
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130 | } |
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131 | } |
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132 | |
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