Visual Servoing Platform  version 3.2.0 under development (2018-08-16)
tutorial-ibvs-4pts-plotter-gain-adaptive.cpp
#include <visp3/gui/vpPlot.h>
#include <visp3/robot/vpSimulatorCamera.h>
#include <visp3/visual_features/vpFeatureBuilder.h>
#include <visp3/vs/vpServo.h>
int main()
{
try {
vpHomogeneousMatrix cdMo(0, 0, 0.75, 0, 0, 0);
vpHomogeneousMatrix cMo(0.15, -0.1, 1., vpMath::rad(10), vpMath::rad(-10), vpMath::rad(50));
vpPoint point[4];
point[0].setWorldCoordinates(-0.1, -0.1, 0);
point[1].setWorldCoordinates(0.1, -0.1, 0);
point[2].setWorldCoordinates(0.1, 0.1, 0);
point[3].setWorldCoordinates(-0.1, 0.1, 0);
vpServo task;
vpAdaptiveGain lambda(4, 0.4, 30);
task.setLambda(lambda);
vpFeaturePoint p[4], pd[4];
for (unsigned int i = 0; i < 4; i++) {
point[i].track(cdMo);
vpFeatureBuilder::create(pd[i], point[i]);
point[i].track(cMo);
vpFeatureBuilder::create(p[i], point[i]);
task.addFeature(p[i], pd[i]);
}
robot.setSamplingTime(0.040);
robot.getPosition(wMc);
wMo = wMc * cMo;
#ifdef VISP_HAVE_DISPLAY
vpPlot plotter(2, 250 * 2, 500, 100, 200, "Real time curves plotter");
plotter.setTitle(0, "Visual features error");
plotter.setTitle(1, "Camera velocities");
plotter.initGraph(0, 8);
plotter.initGraph(1, 6);
plotter.setLegend(0, 0, "x1");
plotter.setLegend(0, 1, "y1");
plotter.setLegend(0, 2, "x2");
plotter.setLegend(0, 3, "y2");
plotter.setLegend(0, 4, "x3");
plotter.setLegend(0, 5, "y3");
plotter.setLegend(0, 6, "x4");
plotter.setLegend(0, 7, "y4");
plotter.setLegend(1, 0, "v_x");
plotter.setLegend(1, 1, "v_y");
plotter.setLegend(1, 2, "v_z");
plotter.setLegend(1, 3, "w_x");
plotter.setLegend(1, 4, "w_y");
plotter.setLegend(1, 5, "w_z");
#endif
unsigned int iter = 0;
while (1) {
robot.getPosition(wMc);
cMo = wMc.inverse() * wMo;
for (unsigned int i = 0; i < 4; i++) {
point[i].track(cMo);
vpFeatureBuilder::create(p[i], point[i]);
}
#ifdef VISP_HAVE_DISPLAY
plotter.plot(0, iter, task.getError());
plotter.plot(1, iter, v);
#endif
if ((task.getError()).sumSquare() < 0.0001)
break;
iter++;
}
std::cout << "Convergence in " << iter << " iterations" << std::endl;
task.kill();
#ifdef VISP_HAVE_DISPLAY
plotter.saveData(0, "error.dat");
plotter.saveData(1, "vc.dat");
#endif
} catch (const vpException &e) {
std::cout << "Catch an exception: " << e << std::endl;
}
}