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int nb_proj;
double screen_width;
double screen_height;
double rect_width = 0;
double rect_height = 0;
double rect_top_left_x = 0;
double rect_top_left_y = 0;
int Win1;
// des points que je vais afficher
std::vector<CvPoint2D64d> * the_points;
// mon main...
// (en fait mon application openGL est appellée par un autre code, c pr ça que c pas un main)
int start(std::vector<CvPoint2D64d> * points, int nb_projectors, double screen_width, double screen_height)
{
// initialize the global variables
nb_proj = nb_projectors;
::screen_width = screen_width;
::screen_height = screen_height;
the_points = new std::vector<CvPoint2D64d> (*points);
// g mis n'importe quoi ici...
int arg1 = 1;
char * arg2 = "window";
glutInit(&arg1, &arg2);
glutInitWindowSize(640, 480);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
Win1 = glutCreateWindow("Display Wall Simlator");
glShadeModel(GL_FLAT);
glutReshapeFunc(Reshape);
glutDisplayFunc(Draw);
glutKeyboardFunc(myGlutKeyboard);
glutMouseFunc(myGlutMouse);
printf("press 'H' for help\n");
glutMainLoop();
return 0;
}
////////////////////////////////////////////////////////////////////////////
void Reshape(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45, float(width)/float(height), 1, 5000);
glMatrixMode(GL_MODELVIEW);
glutPostRedisplay();
}
////////////////////////////////////////////////////////////////////////////
void Draw()
{
glClearColor(.65, .65, .65, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0, 0, 3200, 0, 0, 0, 0, 1, 0);
glTranslated(-screen_width/2, screen_height/2, 0);
glColor4f(0.0f, 1.0f, 0.0f, 0.0f);
int i = 0;
for (i = 0; i < nb_proj; i++)
{
glBegin(GL_LINE_LOOP);
for (int j = 0; j < 4; j++)
glVertex2d(the_points->at(j + 4*i).x, -the_points->at(j + 4*i).y);
glEnd();
}
glColor4f(0.0f, 0.0f, 1.0f, 0.0f);
glBegin(GL_LINE_LOOP);
glVertex2d(0, 0);
glVertex2d(screen_width, 0);
glVertex2d(screen_width, -screen_height);
glVertex2d(0, -screen_height);
glEnd();
printf("DRAW : rect_top_left_x = %g, rect_top_left_y = %g\n", rect_top_left_x, rect_top_left_y);
printf("\trect_width = %g, rect_height = %g\n\n", rect_width, rect_height);
glColor4f(1.0f, 0.0f, 0.0f, 0.0f);
glTranslated(rect_top_left_x, rect_top_left_y, 0);
glBegin(GL_LINE_LOOP); // GL_LINE_LOOP
glVertex2d(0, 0);
glVertex2d(rect_width, 0);
glVertex2d(rect_width, -rect_height);
glVertex2d(0, -rect_height);
glEnd();
glutSwapBuffers();
}
void myGlutKeyboard(unsigned char key, int x, int y)
{
switch (key)
{
// move the center of the rectangle
case 's':
rect_top_left_x--;
glutPostRedisplay();
break;
case 'd':
rect_top_left_x++;
glutPostRedisplay();
break;
// etc...
default:
break;
}
glutPostRedisplay();
}
void myGlutMouse(int button, int button_state, int x, int y )
{
double ox, oy, oz;
double projectionMatrix[16], modelviewMatrix[16];
int viewport[4];
glGetDoublev(GL_PROJECTION_MATRIX, projectionMatrix);
glGetDoublev(GL_MODELVIEW_MATRIX, modelviewMatrix);
glGetIntegerv(GL_VIEWPORT, viewport);
double wy = viewport[3] - y; //le depth buffer est inversé en y
//par rapport à ce que l'on voit à l'écran
double wx = x;
double wz;
glReadPixels((int)wx, (int)wy, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &wz);
gluUnProject(wx, wy, wz, modelviewMatrix, projectionMatrix, viewport, &ox, &oy, &oz);
printf("ox = %g, oy = %g, oz = %g\n", ox, oy, oz);
if (button == GLUT_LEFT_BUTTON && button_state == GLUT_DOWN)
{
rect_top_left_x = ox;
rect_top_left_y = oy;
}
if (button == GLUT_LEFT_BUTTON && button_state == GLUT_UP)
{
rect_width = fabs(ox - rect_top_left_x);
rect_height = fabs(oy - rect_top_left_y);
}
printf("MOUSE : rect_top_left_x = %g, rect_top_left_y = %g\n", rect_top_left_x, rect_top_left_y);
printf("\trect_width = %g, rect_height = %g\n\n", rect_width, rect_height);
glutPostRedisplay();
} |
