Visual Servoing Platform  version 3.2.0 under development (2018-10-21)
BSpline.cpp

Describe a curve thanks to a BSpline.

/****************************************************************************
*
* This file is part of the ViSP software.
* Copyright (C) 2005 - 2017 by Inria. All rights reserved.
*
* This software is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file LICENSE.txt at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using ViSP with software that can not be combined with the GNU
* GPL, please contact Inria about acquiring a ViSP Professional
* Edition License.
*
* See http://visp.inria.fr for more information.
*
* This software was developed at:
* Inria Rennes - Bretagne Atlantique
* Campus Universitaire de Beaulieu
* 35042 Rennes Cedex
* France
*
* If you have questions regarding the use of this file, please contact
* Inria at visp@inria.fr
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Description:
* Exemple of a B-Spline curve.
*
* Authors:
* Nicolas Melchior
*
*****************************************************************************/
#include <visp3/core/vpDebug.h>
#include <visp3/core/vpBSpline.h>
#include <visp3/core/vpDisplay.h>
#include <visp3/core/vpImage.h>
#include <visp3/core/vpImagePoint.h>
#include <visp3/io/vpImageIo.h>
#ifdef VISP_HAVE_MODULE_GUI
#include <visp3/gui/vpDisplayD3D.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayGTK.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h> // Should be after #include <visp3/gui/vpDisplayOpenCV.h>
#endif
#include <cstdlib>
#include <stdlib.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/io/vpParseArgv.h>
#if defined(VISP_HAVE_X11) || defined(VISP_HAVE_GTK) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV) || \
defined(VISP_HAVE_D3D9)
// List of allowed command line options
#define GETOPTARGS "cdh"
void usage(const char *name, const char *badparam);
bool getOptions(int argc, const char **argv, bool &click_allowed, bool &display);
void usage(const char *name, const char *badparam)
{
fprintf(stdout, "\n\
Describe a curve thanks to a BSpline.\n\
\n\
SYNOPSIS\n\
%s [-c] [-d] [-h]\n", name);
fprintf(stdout, "\n\
OPTIONS: Default\n\
-c\n\
Disable the mouse click. Useful to automaze the \n\
execution of this program without humain intervention.\n\
\n\
-d \n\
Turn off the display.\n\
\n\
-h\n\
Print the help.\n");
if (badparam)
fprintf(stdout, "\nERROR: Bad parameter [%s]\n", badparam);
}
bool getOptions(int argc, const char **argv, bool &click_allowed, bool &display)
{
const char *optarg_;
int c;
while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {
switch (c) {
case 'c':
click_allowed = false;
break;
case 'd':
display = false;
break;
case 'h':
usage(argv[0], NULL);
return false;
break;
default:
usage(argv[0], optarg_);
return false;
break;
}
}
if ((c == 1) || (c == -1)) {
// standalone param or error
usage(argv[0], NULL);
std::cerr << "ERROR: " << std::endl;
std::cerr << " Bad argument " << optarg_ << std::endl << std::endl;
return false;
}
return true;
}
int main(int argc, const char **argv)
{
try {
bool opt_click_allowed = true;
bool opt_display = true;
// Read the command line options
if (getOptions(argc, argv, opt_click_allowed, opt_display) == false) {
exit(-1);
}
// Declare an image, this is a gray level image (unsigned char)
// it size is not defined yet, it will be defined when the image will
// read on the disk
// We open a window using either X11, GTK or GDI.
#ifdef VISP_HAVE_MODULE_GUI
#if defined VISP_HAVE_X11
vpDisplayX display;
#elif defined VISP_HAVE_GTK
vpDisplayGTK display;
#elif defined VISP_HAVE_GDI
vpDisplayGDI display;
#elif defined VISP_HAVE_OPENCV
vpDisplayOpenCV display;
#elif defined VISP_HAVE_D3D9
vpDisplayD3D display;
#endif
if (opt_display) {
// Display size is automatically defined by the image (I) size
display.init(I, 100, 100, "Display image");
}
#endif
vpBSpline bSpline;
std::list<double> knots;
knots.push_back(0);
knots.push_back(0);
knots.push_back(0);
knots.push_back(1);
knots.push_back(2);
knots.push_back(3);
knots.push_back(4);
knots.push_back(4);
knots.push_back(5);
knots.push_back(5);
knots.push_back(5);
std::list<vpImagePoint> controlPoints;
pt.set_ij(50, 300);
controlPoints.push_back(pt);
pt.set_ij(100, 130);
controlPoints.push_back(pt);
pt.set_ij(150, 400);
controlPoints.push_back(pt);
pt.set_ij(200, 370);
controlPoints.push_back(pt);
pt.set_ij(250, 120);
controlPoints.push_back(pt);
pt.set_ij(300, 250);
controlPoints.push_back(pt);
pt.set_ij(350, 200);
controlPoints.push_back(pt);
pt.set_ij(400, 300);
controlPoints.push_back(pt);
bSpline.set_p(2);
bSpline.set_knots(knots);
bSpline.set_controlPoints(controlPoints);
std::cout << "The parameters are :" << std::endl;
std::cout << "p : " << bSpline.get_p() << std::endl;
std::cout << "" << std::endl;
std::cout << "The knot vector :" << std::endl;
std::list<double> knots_cur;
bSpline.get_knots(knots_cur);
unsigned int i_display = 0;
for (std::list<double>::const_iterator it = knots_cur.begin(); it != knots_cur.end(); ++it, ++i_display) {
std::cout << i_display << " ---> " << *it << std::endl;
}
std::cout << "The control points are :" << std::endl;
std::list<vpImagePoint> controlPoints_cur;
bSpline.get_controlPoints(controlPoints_cur);
i_display = 0;
for (std::list<vpImagePoint>::const_iterator it = controlPoints_cur.begin(); it != controlPoints_cur.end();
++it, ++i_display) {
std::cout << i_display << " ---> " << *it << std::endl;
}
unsigned int i = bSpline.findSpan(5 / 2.0);
std::cout << "The knot interval number for the value u = 5/2 is : " << i << std::endl;
vpBasisFunction *N = NULL;
N = bSpline.computeBasisFuns(5 / 2.0);
std::cout << "The nonvanishing basis functions N(u=5/2) are :" << std::endl;
for (unsigned int j = 0; j < bSpline.get_p() + 1; j++)
std::cout << N[j].value << std::endl;
vpBasisFunction **N2 = NULL;
N2 = bSpline.computeDersBasisFuns(5 / 2.0, 2);
std::cout << "The first derivatives of the basis functions N'(u=5/2) are :" << std::endl;
for (unsigned int j = 0; j < bSpline.get_p() + 1; j++)
std::cout << N2[1][j].value << std::endl;
std::cout << "The second derivatives of the basis functions N''(u=5/2) are :" << std::endl;
for (unsigned int j = 0; j < bSpline.get_p() + 1; j++)
std::cout << N2[2][j].value << std::endl;
if (opt_display && opt_click_allowed) {
double u = 0.0;
while (u <= 5) {
pt = bSpline.computeCurvePoint(u);
u += 0.01;
}
for (std::list<vpImagePoint>::const_iterator it = controlPoints.begin(); it != controlPoints.end(); ++it) {
}
}
if (N != NULL)
delete[] N;
if (N2 != NULL) {
for (unsigned int j = 0; j <= 2; j++)
delete[] N2[j];
delete[] N2;
}
return EXIT_SUCCESS;
} catch (const vpException &e) {
std::cout << "Catch an exception: " << e << std::endl;
return EXIT_FAILURE;
}
}
#else
int main()
{
std::cout << "You do not have X11, GTK, or OpenCV, or GDI (Graphical Device Interface) functionalities to display images..." << std::endl;
std::cout << "Tip if you are on a unix-like system:" << std::endl;
std::cout << "- Install X11, configure again ViSP using cmake and build again this example" << std::endl;
std::cout << "Tip if you are on a windows-like system:" << std::endl;
std::cout << "- Install GDI, configure again ViSP using cmake and build again this example" << std::endl;
return EXIT_SUCCESS;
}
#endif