navwin.cpp

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//
// simple timing test of the nav fn planner
// 

#include <navfn/navwin.h>
#include <string.h>

namespace navfn {
NavWin::NavWin(int w, int h, const char *name)
  : Fl_Double_Window(w,h,name)
{
  nw = w;
  nh = h;
  dec = 1;
  maxval = 90*1000;
  im = NULL;
  pw = w;
  ph = h;
  pce = pne = poe = 0;
  pc = pn = po = NULL;
  pathlen = pathbuflen = 0;
  path = NULL;
}

NavWin::~NavWin()
{
}

void
NavWin::drawPot(NavFn *nav)
{
  float *pot = nav->potarr;
  COSTTYPE *cst = nav->costarr;
  int width = nav->nx;
  int height = nav->ny;

  // params
  pw = width;
  ph = height;

  // figure out decimation or expansion to fit
  dec = 1;
  inc = 1;

  if (width >= nw/2)
    {
      int ww = width; 
      while (ww > nw)
        {
          dec++;
          ww = width/dec;
        }

      int hh = height/dec;
      while (hh > nh)
        {
          dec++;
          hh = height/dec;
        }

      if (im == NULL)
        im = new uchar[nw*nh*3];


      // draw potential
      for (int i=0; i<height-dec+1; i+=dec)
        {
          float *pp = pot + i*width;
          uchar *ii = im + 3*i/dec * nw;
          for (int j=0; j<width-dec+1; j+=dec, pp+=dec)
            {
              int v;
              if (*pp > maxval)
                v = 255;
              else
                v = (int)((*pp/maxval) * 255.0);
              *ii++ = v;
              *ii++ = v;
              *ii++ = v;
            }
        }


      // draw obstacles
      for (int i=0; i<height-dec+1; i+=dec)
        {
          COSTTYPE *pp = cst + i*width;
          uchar *ii = im + 3*i/dec * nw;
          for (int j=0; j<width-dec+1; j+=dec, pp+=dec, ii+=3)
            {
              if (*pp >= COST_OBS)
                {
                  *ii =     120;
                  *(ii+1) = 60;
                  *(ii+2) = 60;
                }
            }
        }

    }

  else                          // expand
    {
      int ww = width; 
      while (ww < nw/2)
        {
          inc++;
          ww = width*inc;
        }

      int hh = height*inc;
      while (hh < nh/2)
        {
          inc++;
          hh = height*inc;
        }

      if (im == NULL)
        im = new uchar[nw*nh*3];

      for (int i=0; i<height; i++)
        {
          float *pp = pot + i*width;
          uchar *ii = im + 3*i*inc * nw;
          for (int j=0; j<width; j++, pp++)
            {
              int v;
              if (*pp > maxval)
                v = 255;
              else
                v = (int)((*pp/maxval) * 255.0);
              for (int k=0; k<inc; k++)
                {
                  uchar *iii = ii + 3*j*inc + 3*k*nw;
                  for (int kk=0; kk<inc; kk++)
                    {
                      *iii++ = v;
                      *iii++ = v;
                      *iii++ = v;
                    }
                }
            }
        }
    }


  make_current();
  fl_draw_image(im, 0,0,nw,nh);

  if (pc)
    delete [] pc;
  pce = nav->curPe;
  pc = new int[pce];
  memcpy(pc, nav->curP, pce*sizeof(int));

  if (pn)
    delete [] pn;
  pne = nav->nextPe;
  pn = new int[pne];
  memcpy(pn, nav->nextP, pne*sizeof(int));

  if (po)
    delete [] po;
  poe = nav->overPe;
  po = new int[poe];
  memcpy(po, nav->overP, poe*sizeof(int));

  // start and goal
  goal[0] = nav->goal[0];
  goal[1] = nav->goal[1];
  start[0] = nav->start[0];
  start[1] = nav->start[1];

  // path
  if (nav->npath > 0)
    {
      pathlen = nav->npath;
      if (pathbuflen < pathlen)
        {
          pathbuflen = pathlen;
          if (path) delete [] path;
          path = new int[pathbuflen];
        }
      for (int i=0; i<pathlen; i++)
        path[i] = width*(int)(nav->pathy[i])+(int)(nav->pathx[i]);
    }

  drawOverlay();

  redraw();
}


void 
NavWin::drawOverlay()
{
  if (inc == 1)                 // decimation
    {
      fl_color(255,0,0);
      if (pce > 0)
        for (int i=0; i<pce; i++)
          {
            int y = pc[i]/pw;
            int x = pc[i]%pw;
            fl_point(x/dec,y/dec);
          }
      fl_color(255,0,0);
      if (pne > 0)
        for (int i=0; i<pne; i++)
          {
            int y = pn[i]/pw;
            int x = pn[i]%pw;
            fl_point(x/dec,y/dec);
          }
      fl_color(0,255,0);
      if (poe > 0)
        for (int i=0; i<poe; i++)
          {
            int y = po[i]/pw;
            int x = po[i]%pw;
            fl_point(x/dec,y/dec);
          }
    }
  else                          // expansion
    {
      fl_color(255,0,0);
      if (pce > 0)
        for (int i=0; i<pce; i++)
          {
            int y = pc[i]/pw;
            int x = pc[i]%pw;
            fl_rect(x*inc,y*inc,inc,inc);
          }
      fl_color(255,0,0);
      if (pne > 0)
        for (int i=0; i<pne; i++)
          {
            int y = pn[i]/pw;
            int x = pn[i]%pw;
            fl_rect(x*inc,y*inc,inc,inc);
          }
      fl_color(0,255,0);
      if (poe > 0)
        for (int i=0; i<poe; i++)
          {
            int y = po[i]/pw;
            int x = po[i]%pw;
            fl_rect(x*inc,y*inc,inc,inc);
          }
    }

  // draw the goal
  fl_color(255,200,0);
  int x = goal[0];
  int y = goal[1];
  if (inc == 1)
    fl_rectf(x/dec-2,y/dec-2,5,5);      
  else
    fl_rectf(x*inc-2,y*inc-2,5,5);      

  // draw the start
  fl_color(0,255,0);
  x = start[0];
  y = start[1];
  if (inc == 1)
    fl_rectf(x/dec-2,y/dec-2,5,5);      
  else
    fl_rectf(x*inc-2,y*inc-2,5,5);      

  // draw the path
  fl_color(0,255,255);
  if (inc == 1 && pathlen > 0)  // decimation or equal pixels
    {
      int y = path[0]/pw;
      int x = path[0]%pw;
      for (int i=1; i<pathlen; i++)
        {
          int y1 = path[i]/pw;
          int x1 = path[i]%pw;
          fl_line(x/dec,y/dec,x1/dec,y1/dec);
          x = x1;
          y = y1;
        }
    }
}


void NavWin::draw()
{
  if (im)
    fl_draw_image(im, 0,0,nw,nh);
  drawOverlay();
}
};