void G308_Geometry::stopPicking() {
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glFlush();
hits = glRenderMode(GL_RENDER);
//printf(" Back to render, %d hits ", hits);
if (hits != 0){
processHits2(hits,selectBuf,0);
}
else sel_vrt=-1; // clear clicks
}
void TPinterface::performPicking2(int x, int y)
{
// Sets the buffer to be used for selection and activate selection mode
glSelectBuffer (BUFSIZE, selectBuf);
glRenderMode(GL_SELECT);
// Initialize the picking name stack
glInitNames();
// The process of picking manipulates the projection matrix
// so we will be activating, saving and manipulating it
glMatrixMode(GL_PROJECTION);
//store current projmatrix to restore easily in the end with a pop
glPushMatrix ();
//get the actual projection matrix values on an array of our own to multiply with pick matrix later
GLfloat projmat[16];
glGetFloatv(GL_PROJECTION_MATRIX,projmat);
// reset projection matrix
glLoadIdentity();
// get current viewport and use it as reference for
// setting a small picking window of 5x5 pixels around mouse coordinates for picking
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
// this is multiplied in the projection matrix
gluPickMatrix ((GLdouble) x, (GLdouble) (CGFapplication::height - y), 5.0, 5.0, viewport);
// multiply the projection matrix stored in our array to ensure same conditions as in normal render
glMultMatrixf(projmat);
// force scene drawing under this mode
// only the names of objects that fall in the 5x5 window will actually be stored in the buffer
scene->display();
// restore original projection matrix
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
glFlush();
// revert to render mode, get the picking results and process them
GLint hits;
hits = glRenderMode(GL_RENDER);
processHits2(hits, selectBuf);
}
