1 | // %flair:license{
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2 | // This file is part of the Flair framework distributed under the
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3 | // CECILL-C License, Version 1.0.
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4 | // %flair:license}
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5 | // created: 2013/04/08
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6 | // filename: TrajectoryGenerator2DCircle_impl.cpp
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7 | //
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8 | // author: Guillaume Sanahuja
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9 | // Copyright Heudiasyc UMR UTC/CNRS 7253
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10 | //
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11 | // version: $Id: $
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12 | //
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13 | // purpose: objet permettant la generation d'une trajectoire cercle
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14 | //
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15 | //
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16 | /*********************************************************************/
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17 |
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18 | #include "TrajectoryGenerator2DCircle_impl.h"
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19 | #include "TrajectoryGenerator2DCircle.h"
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20 | #include <cvmatrix.h>
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21 | #include <Layout.h>
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22 | #include <GroupBox.h>
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23 | #include <DoubleSpinBox.h>
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24 | #include <cmath>
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25 |
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26 | #define PI ((float)3.14159265358979323846)
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27 |
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28 | using std::string;
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29 | using namespace flair::core;
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30 | using namespace flair::gui;
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31 | using namespace flair::filter;
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32 |
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33 | TrajectoryGenerator2DCircle_impl::TrajectoryGenerator2DCircle_impl(TrajectoryGenerator2DCircle* self,const LayoutPosition* position,string name) {
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34 | first_update=true;
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35 | is_running=false;
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36 | is_finishing=false;
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37 |
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38 | //init UI
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39 | GroupBox* reglages_groupbox=new GroupBox(position,name);
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40 | T=new DoubleSpinBox(reglages_groupbox->NewRow(),"period, 0 for auto"," s",0,1,0.01);
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41 | rayon=new DoubleSpinBox(reglages_groupbox->LastRowLastCol(),"R"," m",0,1000,.1);
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42 | veloctity=new DoubleSpinBox(reglages_groupbox->LastRowLastCol(),"velocity"," m/s",-10,10,1);
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43 | acceleration=new DoubleSpinBox(reglages_groupbox->LastRowLastCol(),"acceleration (absolute)"," m/s²",0,10,.1);
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44 |
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45 | //init matrix
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46 | cvmatrix_descriptor* desc=new cvmatrix_descriptor(2,2);
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47 | desc->SetElementName(0,0,"pos.x");
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48 | desc->SetElementName(0,1,"pos.y");
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49 | desc->SetElementName(1,0,"vel.x");
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50 | desc->SetElementName(1,1,"vel.y");
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51 | output=new cvmatrix(self,desc,floatType,name);
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52 |
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53 | output->SetValue(0,0,0);
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54 | output->SetValue(0,1,0);
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55 | output->SetValue(1,0,0);
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56 | output->SetValue(1,1,0);
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57 | }
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58 |
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59 |
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60 | TrajectoryGenerator2DCircle_impl::~TrajectoryGenerator2DCircle_impl() {
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61 | delete output;
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62 | }
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63 |
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64 | void TrajectoryGenerator2DCircle_impl::StartTraj(const Vector2D &start_pos,float nb_lap) {
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65 | is_running=true;
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66 | first_update=true;
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67 | is_finishing=false;
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68 | this->nb_lap=nb_lap;
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69 |
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70 | //configure trajectory
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71 | angle_off=atan2(start_pos.y-pos_off.y,start_pos.x-pos_off.x);
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72 | CurrentTime=0;
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73 | }
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74 |
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75 | void TrajectoryGenerator2DCircle_impl::FinishTraj(void) {
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76 | if(!is_finishing) {
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77 | is_finishing=true;
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78 | FinishTime=CurrentTime;
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79 | }
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80 | }
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81 |
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82 | void TrajectoryGenerator2DCircle_impl::Update(Time time) {
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83 | float delta_t;
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84 | float theta;
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85 | float V=veloctity->Value();
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86 | float A=acceleration->Value();
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87 | float R=rayon->Value();
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88 | Vector2D v;
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89 |
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90 | if(V<0) A=-A;
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91 |
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92 | if(T->Value()==0) {
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93 | if(first_update) {
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94 | first_update=false;
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95 | previous_time=time;
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96 | return;
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97 | } else {
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98 | delta_t=(float)(time-previous_time)/1000000000.;
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99 | }
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100 | } else {
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101 | delta_t=T->Value();
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102 | }
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103 | previous_time=time;
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104 | CurrentTime+=delta_t;
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105 |
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106 | if(is_finishing && CurrentTime>FinishTime+V/A) is_running=false;
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107 |
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108 | if(is_running) {
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109 | if(R==0) {
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110 | pos.x=0;
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111 | pos.y=0;
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112 | v.x=0;
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113 | v.y=0;
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114 | } else {
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115 | if(CurrentTime<V/A) {
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116 | theta=angle_off+A/2*CurrentTime*CurrentTime/R;
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117 | pos.x=R*cos(theta);
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118 | pos.y=R*sin(theta);
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119 | v.x=-A*CurrentTime*sin(theta);
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120 | v.y=A*CurrentTime*cos(theta);
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121 | } else {
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122 | if(!is_finishing) {
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123 | theta=angle_off+V*V/(2*A*R)+(CurrentTime-V/A)*V/R;
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124 | pos.x=R*cos(theta);
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125 | pos.y=R*sin(theta);
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126 | v.x=-V*sin(theta);
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127 | v.y=V*cos(theta);
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128 | } else {
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129 | theta=angle_off+V*V/(2*A*R)+(FinishTime-V/A)*V/R-A/2*(FinishTime-CurrentTime)*(FinishTime-CurrentTime)/R+V*(CurrentTime-FinishTime)/R;
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130 | pos.x=R*cos(theta);
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131 | pos.y=R*sin(theta);
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132 | v.x=-(V+A*(FinishTime-CurrentTime))*sin(theta);
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133 | v.y=(V+A*(FinishTime-CurrentTime))*cos(theta);
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134 | }
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135 | }
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136 | }
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137 |
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138 | if(theta-angle_off>=nb_lap*2*PI-(-A/2*(V/A)*(V/A)/R+V*(V/A)/R) && nb_lap>0) {
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139 | FinishTraj();
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140 | }
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141 | } else {
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142 | v.x=0;
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143 | v.y=0;
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144 | }
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145 |
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146 | //on prend une fois pour toute les mutex et on fait des accès directs
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147 | output->GetMutex();
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148 | output->SetValueNoMutex(0,0,pos.x+pos_off.x);
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149 | output->SetValueNoMutex(0,1,pos.y+pos_off.y);
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150 | output->SetValueNoMutex(1,0,v.x+vel_off.x);
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151 | output->SetValueNoMutex(1,1,v.y+vel_off.y);
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152 | output->ReleaseMutex();
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153 |
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154 | output->SetDataTime(time);
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155 | }
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