[BACK]Return to imageresponse.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / homework

Diff for /loncom/homework/imageresponse.pm between versions 1.42 and 1.105

version 1.42, 2003/11/11 00:39:33 version 1.105, 2013/04/30 03:03:34
Line 1 Line 1
   #
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # image click response style  # image click response style
 #  #
Line 28 Line 29
 #FIXME LATER assumes multiple possible submissions but only one is possible   #FIXME LATER assumes multiple possible submissions but only one is possible 
 #currently  #currently
   
   
   =head1 NAME
   
   Apache::imageresponse
   
   =head1 SYNOPSIS
   
   Coordinates the response to clicking an image.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 SUBROUTINES
   
   =over
   
   =item start_imageresponse()
   
   =item end_imageresponse()
   
   =item start_foilgroup()
   
   =item getfoilcounts()
   
   =item whichfoils()
   
   =item prep_image()
   
   =item draw_image()
   
   =item displayfoils()
   
   =item format_prior_response()
   
   =item display_answers()
   
   =item clean_up_image()
   
   =item gradefoils()
   
   =item stringify_submission()
   
   =item get_submission()
   
   =item end_foilgroup()
   
   =item start_conceptgroup()
   
   =item end_conceptgroup()
   
   =item insert_foil()
   
   =item start_foil()
   
   =item end_foil()
   
   =item start_text()
   
   =item end_text()
   
   =item start_image()
   
   =item end_image()
   
   =item start_rectangle()
   
   =item grade_rectangle()
   
   =item end_rectangle()
   
   =item start_polygon()
   
   =item grade_polygon()
   
   =item end_polygon()
   
   =back
   
   =cut
   
   
 package Apache::imageresponse;  package Apache::imageresponse;
 use strict;  use strict;
 use Image::Magick;  use Image::Magick();
 use Apache::randomlylabel;  use Apache::randomlylabel();
   use Apache::londefdef();
 use Apache::Constants qw(:common :http);  use Apache::Constants qw(:common :http);
   use Apache::lonlocal;
   use Apache::lonnet;
   use lib '/home/httpd/lib/perl/';
   use LONCAPA;
    
   
 BEGIN {  BEGIN {
     &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));      &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
Line 42  sub start_imageresponse { Line 130  sub start_imageresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
     #when in a radiobutton response use these      #when in a radiobutton response use these
     &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));      &Apache::lonxml::register('Apache::imageresponse',
         ('foilgroup','foil','text','image','rectangle',
          'polygon','conceptgroup'));
     push (@Apache::lonxml::namespace,'imageresponse');      push (@Apache::lonxml::namespace,'imageresponse');
     my $id = &Apache::response::start_response($parstack,$safeeval);      my $id = &Apache::response::start_response($parstack,$safeeval);
       undef(%Apache::response::foilnames);
     if ($target eq 'meta') {      if ($target eq 'meta') {
  $result=&Apache::response::meta_package_write('imageresponse');   $result=&Apache::response::meta_package_write('imageresponse');
     } elsif ($target eq 'analyze') {      } elsif ($target eq 'analyze') {
  my $part_id="$Apache::inputtags::part.$id";   my $part_id="$Apache::inputtags::part.$id";
           $Apache::lonhomework::analyze{"$part_id.type"} = 'imageresponse';
  push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);   push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
    push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
         1);
       } elsif ( $target eq 'edit' ) {
    $result .= &Apache::edit::tag_start($target,$token).
       &Apache::edit::text_arg('Max Number Of Shown Foils:',
       'max',$token,'4').
       &Apache::edit::end_row().
       &Apache::edit::start_spanning_row();
       } elsif ( $target eq 'modified' ) {
    my $constructtag=
       &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
     }      }
     return $result;      return $result;
 }  }
   
 sub end_imageresponse {  sub end_imageresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     &Apache::response::end_response;  
     pop @Apache::lonxml::namespace;      my $part_id     = $Apache::inputtags::part;
       my $response_id = $Apache::inputtags::response[-1]; 
   
       pop(@Apache::lonxml::namespace);
     &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));      &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
   
     my $result;      my $result;
     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }      if ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       } elsif ($target eq 'tex'
        && $Apache::lonhomework::type eq 'exam') {
    $result=&Apache::inputtags::exam_score_line($target);
       }
   
       undef(%Apache::response::foilnames);
       
       if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
    $target eq 'tex' || $target eq 'analyze') {
           my $repetition = &Apache::response::repetition();
    &Apache::lonxml::increment_counter($repetition, 
      "$part_id.$response_id");
    if ($target eq 'analyze') {
       &Apache::lonhomework::set_bubble_lines();
    }
   
       }
       &Apache::response::end_response();
     return $result;      return $result;
 }  }
   
 %Apache::response::foilgroup=();  %Apache::response::foilgroup=();
 sub start_foilgroup {  sub start_foilgroup {
       my ($target) = @_;
     %Apache::response::foilgroup=();      %Apache::response::foilgroup=();
     $Apache::imageresponse::conceptgroup=0;      $Apache::imageresponse::conceptgroup=0;
     &Apache::response::setrandomnumber();      &Apache::response::pushrandomnumber(undef,$target);
     return '';      return '';
 }  }
   
Line 84  sub getfoilcounts { Line 212  sub getfoilcounts {
   
 sub whichfoils {  sub whichfoils {
     my ($max)=@_;      my ($max)=@_;
     if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }      my @names;
     my @names = @{ $Apache::response::foilgroup{'names'} };      if (ref($Apache::response::foilgroup{'names'}) eq 'ARRAY') {
     my @whichopt =();          @names = @{ $Apache::response::foilgroup{'names'} };
       }
       return if (!@names);
       my @whichopt;
     while ((($#whichopt+1) < $max) && ($#names > -1)) {      while ((($#whichopt+1) < $max) && ($#names > -1)) {
  &Apache::lonxml::debug("Have $#whichopt max is $max");   &Apache::lonxml::debug("Have $#whichopt max is $max");
  my $aopt;   my $aopt;
Line 98  sub whichfoils { Line 229  sub whichfoils {
  &Apache::lonxml::debug("From $#names elms, picking $aopt");   &Apache::lonxml::debug("From $#names elms, picking $aopt");
  $aopt=splice(@names,$aopt,1);   $aopt=splice(@names,$aopt,1);
  &Apache::lonxml::debug("Picked $aopt");   &Apache::lonxml::debug("Picked $aopt");
  push (@whichopt,$aopt);   push(@whichopt,$aopt);
     }      }
     return @whichopt;      return @whichopt;
 }  }
   
 sub prep_image {  sub prep_image {
     my ($image,$mode,$name)=@_;      my ($image,$mode,$name)=@_;
     my $part=$Apache::inputtags::part;  
     my $respid=$Apache::inputtags::response['-1'];      my ($x,$y)= &get_submission($name);
       &Apache::lonxml::debug("for $name drawing click at $x and $y");
       &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
   }
   
   sub draw_image {
       my ($mode,$image,$x,$y,$areas) = @_;
   
     my $id=&Apache::loncommon::get_cgi_id();      my $id=&Apache::loncommon::get_cgi_id();
     my %x;  
     $x{"cgi.$id.BGIMG"}=$image;      my (%x,$i);
     my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});      $x{"cgi.$id.BGIMG"}=&escape($image);
   
     #draws 2 xs on the image at the clicked location      #draws 2 xs on the image at the clicked location
     #one in white and then one in red on top of the one in white      #one in white and then one in red on top of the one in white
     if (defined($x) && defined($y)) {  
  $x{"cgi.$id.LINECOUNT"}=4;      if (defined($x)    && $x =~/\S/ 
    && defined($y) && $y =~/\S/ 
    && ($mode eq 'submission' || !&Apache::response::show_answer())
    && $mode ne 'answeronly') {
  my $length = 6;   my $length = 6;
  my $width = 1;   my $width = 1;
  my $extrawidth = 2;   my $extrawidth = 2;
  $x{"cgi.$id.LINE0"}=   my $xmin=($x-$length);
     join(':',(($x-$length),($y-$length),($x+$length),($y+$length),   my $xmax=($x+$length); 
       "FFFFFF",($width+$extrawidth)));   my $ymin=($y-$length);
  $x{"cgi.$id.LINE1"}=   my $ymax=($y+$length);
     join(':',(($x-$length),($y+$length),($x+$length),($y-$length),  
       "FFFFFF",($width+$extrawidth)));   $x{"cgi.$id.OBJTYPE"}.='LINE:';
  $x{"cgi.$id.LINE2"}=   $i=$x{"cgi.$id.OBJCOUNT"}++;
     join(':',(($x-$length),($y-$length),($x+$length),($y+$length),   $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
       "FF0000",($width)));        "FFFFFF",($width+$extrawidth)));
  $x{"cgi.$id.LINE3"}=   $x{"cgi.$id.OBJTYPE"}.='LINE:';
     join(':',(($x-$length),($y+$length),($x+$length),($y-$length),   $i=$x{"cgi.$id.OBJCOUNT"}++;
       "FF0000",($width)));   $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
         "FFFFFF",($width+$extrawidth)));
    $x{"cgi.$id.OBJTYPE"}.='LINE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
         "FF0000",($width)));
    $x{"cgi.$id.OBJTYPE"}.='LINE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
         "FF0000",($width)));
     }      }
     if ($mode eq 'answer') {      if ($mode eq 'answer' || $mode eq 'answeronly') {
  my $width = 1;   my $width = 1;
  my $extrawidth = 2;   my $extrawidth = 2;
  my @areas = @{ $Apache::response::foilgroup{"$name.area"} };   foreach my $area (@{ $areas }) {
  foreach my $area (@areas) {      if ($area=~/^rectangle:/) {
     my ($x1,$y1,$x2,$y2)=   $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
  ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);   $i=$x{"cgi.$id.OBJCOUNT"}++;
     my $i=$x{"cgi.$id.BOXCOUNT"}++;   my ($x1,$y1,$x2,$y2)=
     $x{"cgi.$id.BOX$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",      ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
   ($width+$extrawidth)));   $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
     $i=$x{"cgi.$id.BOXCOUNT"}++;        ($width+$extrawidth)));
     $x{"cgi.$id.BOX$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));   $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
       } elsif ($area=~/^polygon:(.*)/) {
    $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
    $x{"cgi.$id.OBJEXTRA$i"}=$1;
    $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
    $x{"cgi.$id.OBJEXTRA$i"}=$1;
       }
  }   }
     }      }
     &Apache::lonnet::appenv(%x);      &Apache::lonnet::appenv(\%x);
     return $id;      return $id;
 }  }
   
 sub displayfoils {  sub displayfoils {
     my ($target,@whichopt) = @_;      my ($target,@whichopt) = @_;
     my $result ='';      my $result ='';
     my $name;  
     my $temp=1;      my $temp=1;
     foreach $name (@whichopt) {      my @images;
       foreach my $name (@whichopt) {
  $result.=$Apache::response::foilgroup{"$name.text"};   $result.=$Apache::response::foilgroup{"$name.text"};
  &Apache::lonxml::debug("Text is $result");   &Apache::lonxml::debug("Text is $result");
  if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}   if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
  my $image=$Apache::response::foilgroup{"$name.image"};   my $image=$Apache::response::foilgroup{"$name.image"};
  &Apache::lonxml::debug("image is $image");   &Apache::lonxml::debug("image is $image");
  if ( $target eq 'web' && $image !~ /^http:/ ) {   if ( ($target eq 'web' || $target eq 'answer') 
     $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);       && $image !~ /^https?\:/ ) {
     if (&Apache::lonnet::repcopy($image) ne OK) {      $image=&clean_up_image($image);
  $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';  
     }  
  }   }
    push(@images,$image);
  &Apache::lonxml::debug("image is $image");   &Apache::lonxml::debug("image is $image");
  if ( &Apache::response::show_answer() ) {   if ( &Apache::response::show_answer() ) {
     if ($target eq 'tex') {      if ($target eq 'tex') {
Line 178  sub displayfoils { Line 340  sub displayfoils {
     if ($target eq 'tex') {      if ($target eq 'tex') {
  $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";   $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
     } else {      } else {
  my $id=$Apache::inputtags::response['-1'];   my $respid=$Apache::inputtags::response['-1'];
  my $token=&prep_image($image);   my $token=&prep_image($image,'submission',$name);
  my $temp=1;   my $input_id = "HWVAL_$respid:$temp";
  $result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".   my $id = $env{'form.request.prefix'}.$input_id;
     "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";   $result.='<img onclick="image_response_click(\''.$id.'\',event);"
                          src="/adm/randomlabel.png?token='.$token.'" 
                                  id="'.$id.'_imageresponse"
                                   />'.
          '<br />'.
          '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
          '<input type="hidden" name="'.$input_id.'" value="'.
          join(':',&get_submission($name)).'" />';
     }      }
  }   }
  $temp++;   $temp++;
     }      }
       if ($target eq 'web') {
           &get_prior_options(\@images,\@whichopt);
       }
       return $result;
   }
   
   sub get_prior_options {
       my ($currimages,$curropt) = @_;
       return unless((ref($curropt) eq 'ARRAY') && 
                     (ref($currimages) eq 'ARRAY'));
       my $part = $Apache::inputtags::part;
       my $respid   = $Apache::inputtags::response[-1];
       foreach my $i (1..$Apache::lonhomework::history{'version'}) {
           my $partprefix = "$i:resource.$part";
           my $sub_key = "$partprefix.$respid.submission";
           next if (!exists($Apache::lonhomework::history{$sub_key}));
           my $type_key = "$partprefix.type";
           my @whichopt = ();
           my @images = ();
           if ($Apache::lonhomework::history{$type_key} eq 'randomizetry') {
               my $order_key = "$partprefix.$respid.foilorder";
               @whichopt = &Apache::lonnet::str2array($Apache::lonhomework::history{$order_key});
               if (@whichopt > 0) {
                   foreach my $name (@whichopt) {
                       my $image=$Apache::response::foilgroup{"$name.image"};
                       if ($image !~ /^https?\:/ ) {
                           $image=&clean_up_image($image);
                       }
                       push(@images,$image);
                   }
               }
           } else {
               @whichopt = @{$curropt};
               @images = @{$currimages};
           }
           my $submission;
           if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
               (($env{'form.grade_username'} eq $env{'user.name'}) &&
                ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
               $submission = $Apache::lonhomework::history{$sub_key};
           } else {
               unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
                       ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
                   $submission = $Apache::lonhomework::history{$sub_key};
               }
           }
           my $output =  &format_prior_response('grade',$submission,
                                                [\@images,\@whichopt]);
           if (defined($output)) {
               $Apache::inputtags::submission_display{$sub_key} = $output;
           }
       }
   }
   
   sub format_prior_response {
       my ($mode,$answer,$other_data) = @_;
       
       my $result;
   
       # make a copy of the data in the refs
       my @images = @{ $other_data->[0] };
       my @foils = @{ $other_data->[1] };
       foreach my $name (@foils) {
    my $image = pop(@images);
    my ($x,$y) = &get_submission($name,$answer);
    my $token = &draw_image('submission',$image,$x,$y);
    $result .=
       '<img class="LC_prior_image"
                     src="/adm/randomlabel.png?token='.$token.'" /><br />';
       }
     return $result;      return $result;
 }  }
   
   sub display_answers {
       my ($target,$whichopt)=@_;
   
       my $result=&Apache::response::answer_header('imageresponse');
       foreach my $name (@$whichopt) {
    my $image=$Apache::response::foilgroup{"$name.image"};
    &Apache::lonxml::debug("image is $image");
    if ( ($target eq 'web' || $target eq 'answer')
        && $image !~ /^https?\:/ ) {
       $image = &clean_up_image($image);
    } 
    my $token=&prep_image($image,'answeronly',$name);
   
    $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
       }
       $result.=&Apache::response::answer_footer('imageresponse');
       return $result;
   }
   
   sub clean_up_image {
       my ($image)=@_;
       if ($image =~ /\s*<img\s*/) {
    ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
    if ($image !~ /^https?\:/) {
       $image=&Apache::lonnet::hreflocation('',$image);
    }
    if (!$image) {
       $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
    }
       } else {
    $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
    &Apache::lonxml::debug("repcopying: $image");
    if (&Apache::lonnet::repcopy($image) ne 'ok') {
       $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
    }
       }
       return $image;
   }
   
 sub gradefoils {  sub gradefoils {
     my (@whichopt) = @_;      my (@whichopt) = @_;
     my $x;  
     my $y;      my $partid = $Apache::inputtags::part;
     my $result;      my $id     = $Apache::inputtags::response['-1'];
     my $id=$Apache::inputtags::response['-1'];  
       if ($Apache::lonhomework::type eq 'exam') {
    &Apache::response::scored_response($partid,$id);
    return;
       }
       
       my @results;
     my $temp=1;      my $temp=1;
       my %response;
     foreach my $name (@whichopt) {      foreach my $name (@whichopt) {
  $x=$ENV{"form.HWVAL_$id:$temp.x"};   my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
  $y=$ENV{"form.HWVAL_$id:$temp.y"};   $response{$name} = $env{"form.HWVAL_$id:$temp"};
  &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");   &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
  if (defined($x) && defined($y) &&          my @areas; 
     defined(@{ $Apache::response::foilgroup{"$name.area"} })) {          if (ref($Apache::response::foilgroup{"$name.area"}) eq 'ARRAY') {
     my @areas = @{ $Apache::response::foilgroup{"$name.area"} };              @areas = @{ $Apache::response::foilgroup{"$name.area"} };
           }
    if (defined($x) && defined($y) && @areas) {
     my $grade="INCORRECT";      my $grade="INCORRECT";
     foreach my $area (@areas) {      foreach my $area (@areas) {
  &Apache::lonxml::debug("Area is $area for $name");   &Apache::lonxml::debug("Area is $area for $name");
Line 211  sub gradefoils { Line 498  sub gradefoils {
  &Apache::lonxml::debug("Area of type $1");   &Apache::lonxml::debug("Area of type $1");
  if ($1 eq 'rectangle') {   if ($1 eq 'rectangle') {
     $grade=&grade_rectangle($area,$x,$y);      $grade=&grade_rectangle($area,$x,$y);
    } elsif ($1 eq 'polygon') {
       $grade=&grade_polygon($area,$x,$y);
  } else {   } else {
     &Apache::lonxml::error("Unknown area style $area");      &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
  }   }
  &Apache::lonxml::debug("Area said $grade");   &Apache::lonxml::debug("Area said $grade");
  if ($grade eq 'APPROX_ANS') { last; }   if ($grade eq 'APPROX_ANS') { last; }
     }      }
     &Apache::lonxml::debug("Foil was $grade");      &Apache::lonxml::debug("Foil was $grade");
     if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }      push(@results, $grade)
     if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }   } else {
     &Apache::lonxml::debug("Question is $result");      push(@results, 'MISSING_ANSWER')
     $temp++;  
  }   }
    $temp++;
       }
       if ($Apache::lonhomework::type eq 'randomizetry') {
           $Apache::lonhomework::results{"resource.$partid.$id.foilorder"} = &Apache::lonnet::array2str(@whichopt);
       }
       my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
       &Apache::lonxml::debug("Question is $result");
   
       my $part=$Apache::inputtags::part;
       my %previous=
    &Apache::response::check_for_previous(&stringify_submission(\%response),
         $part,$id);
       if ($result) { 
    if ($Apache::lonhomework::type eq 'survey') { 
               $result='SUBMITTED';
           } elsif ($Apache::lonhomework::type eq 'surveycred') { 
               $result='SUBMITTED_CREDIT'; 
           } elsif ($Apache::lonhomework::type eq 'anonsurvey') { 
               $result='ANONYMOUS'; 
           } elsif ($Apache::lonhomework::type eq 'anonsurveycred') { 
               $result='ANONYMOUS_CREDIT'; 
           }
       }
   
       &Apache::response::handle_previous(\%previous,$result);
       $Apache::lonhomework::results{"resource.$part.$id.submission"}=
    &stringify_submission(\%response);
       $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
       return;
   }
   
   sub stringify_submission {
       my ($response) = @_;
       return &Apache::lonnet::hash2str(%{ $response });
   }
   
   sub get_submission {
       my ($name,$string) = @_;
   
       if (!defined($string)) {
    my $part=$Apache::inputtags::part;
    my $respid=$Apache::inputtags::response['-1'];
           my $newvariation;
           if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') ||
               ($Apache::lonhomework::type eq 'randomizetry')) &&
               ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
               if ($env{'form.'.$part.'.rndseed'} ne
                   $Apache::lonhomework::history{"resource.$part.rndseed"}) {
                   $newvariation = 1;
               }
           }
           unless ($newvariation) {
               if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
                   (($env{'form.grade_username'} eq $env{'user.name'}) &&
                    ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
                   $string =
                       $Apache::lonhomework::history{"resource.$part.$respid.submission"};
               } else {
                   unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
                           ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
                       $string =
                           $Apache::lonhomework::history{"resource.$part.$respid.submission"};
                   }
               }
           }
       }
   
       if ($string !~ /=/) {
    return split(':',$string);
       } else {
    my %response = &Apache::lonnet::str2hash($string);
    return split(':',$response{$name});
     }      }
     $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";  
     $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;  
     return '';  
 }  }
   
 sub end_foilgroup {  sub end_foilgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     my @whichopt;      my (@images,@whichopt);
   
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
  $target eq 'analyze') {   $target eq 'analyze' || $target eq 'answer') {
   
  my ($count,$max) = &getfoilcounts($parstack,$safeeval);   my ($count,$max) = &getfoilcounts($parstack,$safeeval);
  if ($count>$max) { $count=$max }   if ($count>$max) { $count=$max }
  &Apache::lonxml::debug("Count is $count from $max");   &Apache::lonxml::debug("Count is $count from $max");
   
  @whichopt = &whichfoils($max);   @whichopt = &whichfoils($max);
   
  if ($target eq 'web' || $target eq 'tex') {   if ($target eq 'web' || $target eq 'tex') {
     $result=&displayfoils($target,@whichopt);      $result=&displayfoils($target,@whichopt);
               if ($Apache::lonhomework::type eq 'randomizetry') {
                   if ($target eq 'web') {
                       &get_prior_options(\@images,\@whichopt);
                   }
               }
       $Apache::lonxml::post_evaluate=0;
  } elsif ($target eq 'grade') {   } elsif ($target eq 'grade') {
     if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }      if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
  } elsif ( $target eq 'analyze') {   } elsif ( $target eq 'analyze') {
     &Apache::response::analyze_store_foilgroup(\@whichopt,      &Apache::response::analyze_store_foilgroup(\@whichopt,
       ['text','image','area']);        ['text','image','area']);
    } elsif ($target eq 'answer'
    && $env{'form.answer_output_mode'} ne 'tex') {
       $result=&display_answers($target,\@whichopt);
  }   }
   
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result=&Apache::edit::end_table();   $result=&Apache::edit::end_table();
     }      }
       &Apache::response::poprandomnumber();
     return $result;      return $result;
 }  }
   
Line 288  sub insert_foil { Line 660  sub insert_foil {
 $Apache::imageresponse::curname='';  $Apache::imageresponse::curname='';
 sub start_foil {  sub start_foil {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
  $target eq 'analyze') {   $target eq 'analyze' || $target eq 'answer') {
  my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
  if ($name eq '') { $name=$Apache::lonxml::curdepth; }   if ($name eq "") {
       &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
       $name=$Apache::lonxml::curdepth;
    }
    if (defined($Apache::response::foilnames{$name})) {
       &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
                                         ,'<b><tt>'.$name.'</tt></b>'));
    }
    $Apache::response::foilnames{$name}++;
  if ( $Apache::imageresponse::conceptgroup   if ( $Apache::imageresponse::conceptgroup
      && !&Apache::response::showallfoils()) {       && !&Apache::response::showallfoils()
        ) {
     push(@{ $Apache::response::conceptgroup{'names'} }, $name);      push(@{ $Apache::response::conceptgroup{'names'} }, $name);
  } else {   } else {
     push(@{ $Apache::response::foilgroup{'names'} }, $name);      push(@{ $Apache::response::foilgroup{'names'} }, $name);
  }   }
  $Apache::imageresponse::curname=$name;   $Apache::imageresponse::curname=$name;
     }      } elsif ($target eq 'edit') {
     return '';   $result  = &Apache::edit::tag_start($target,$token);
    $result .= &Apache::edit::text_arg('Name:','name',$token);
    $result .= &Apache::edit::end_row().
       &Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'name');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       } 
       return $result;;
 }  }
   
 sub end_foil {  sub end_foil {
Line 315  sub end_foil { Line 706  sub end_foil {
 sub start_text {  sub start_text {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {       if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
    || $target eq 'answer') { 
  &Apache::lonxml::startredirection;    &Apache::lonxml::startredirection; 
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  my $descr=&Apache::lonxml::get_all_text('/text',$parser);   my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
  $result=&Apache::edit::tag_start($target,$token,'Task Description').   $result=&Apache::edit::tag_start($target,$token,'Task Description').
     &Apache::edit::editfield($token->[1],$descr,'Text',60,2).      &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
     &Apache::edit::end_row();      &Apache::edit::end_row();
Line 331  sub start_text { Line 723  sub start_text {
 sub end_text {  sub end_text {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
    || $target eq 'answer') {
  my $name = $Apache::imageresponse::curname;   my $name = $Apache::imageresponse::curname;
  if ( $Apache::imageresponse::conceptgroup   if ( $Apache::imageresponse::conceptgroup
      && !&Apache::response::showallfoils() ) {       && !&Apache::response::showallfoils()
        ) {
     $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;      $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
  } else {   } else {
     $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;      $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
Line 348  sub end_text { Line 742  sub end_text {
 sub start_image {  sub start_image {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {       my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
       if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
    || $target eq 'answer') { 
  &Apache::lonxml::startredirection;    &Apache::lonxml::startredirection; 
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);   my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
  $Apache::edit::bgimgsrc=$bgimg;   $Apache::edit::bgimgsrc=$bgimg;
  $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;   $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
   
  $result=&Apache::edit::tag_start($target,$token,'Clickable Image').   $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
     &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);      &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
  $result.=&Apache::edit::browse(undef,'textnode').' ';   $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
  $result.=&Apache::edit::search(undef,'textnode').   $result.=&Apache::edit::search(undef,'textnode').
     &Apache::edit::end_row();      &Apache::edit::end_row();
     } elsif ($target eq "modified") {      } elsif ($target eq "modified") {
Line 370  sub end_image { Line 766  sub end_image {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
     my $name = $Apache::imageresponse::curname;      my $name = $Apache::imageresponse::curname;
     if ($target eq 'web') {      if ($target eq 'web' || $target eq 'answer') {
  my $image = &Apache::lonxml::endredirection;   my $image = &Apache::lonxml::endredirection();
  &Apache::lonxml::debug("original image is $image");   &Apache::lonxml::debug("original image is $image");
  if ( $Apache::imageresponse::conceptgroup   if ( $Apache::imageresponse::conceptgroup
      && !&Apache::response::showallfoils()) {       && !&Apache::response::showallfoils()
        ) {
     $Apache::response::conceptgroup{"$name.image"} = $image;      $Apache::response::conceptgroup{"$name.image"} = $image;
  } else {   } else {
     $Apache::response::foilgroup{"$name.image"} = $image;      $Apache::response::foilgroup{"$name.image"} = $image;
  }   }
     } elsif ($target eq 'analyze') {      } elsif ($target eq 'analyze') {
  my $image = &Apache::lonxml::endredirection;   my $image = &Apache::lonxml::endredirection();
  if ( $Apache::imageresponse::conceptgroup   if ( $Apache::imageresponse::conceptgroup
      && !&Apache::response::showallfoils()) {       && !&Apache::response::showallfoils()
        ) {
     $Apache::response::conceptgroup{"$name.image"} = $image;      $Apache::response::conceptgroup{"$name.image"} = $image;
  } else {   } else {
     $Apache::response::foilgroup{"$name.image"} = $image;      $Apache::response::foilgroup{"$name.image"} = $image;
Line 390  sub end_image { Line 788  sub end_image {
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result=&Apache::edit::end_table();   $result=&Apache::edit::end_table();
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $src = &Apache::lonxml::endredirection;   my $src = &Apache::lonxml::endredirection();
  $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);  
  my $width_param = '';   #  There may be all sorts of whitespace on fore and aft:
  my $height_param = '';  
  my $scaling = .3;   $src =~ s/\s+$//s;
  my $image = Image::Magick->new;   $src =~ s/^\s+//s;
  my $current_figure = $image->Read($src);  
  $width_param = $image->Get('width') * $scaling;;   #
  $height_param = $image->Get('height') * $scaling;;   #  Gnuplot e.g. just generates the latex to put inplace.
  undef $image;   #
  my $epssrc = $src;   my $graphinclude;
  $epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;   if ($src =~ /^%DYNAMICIMAGE/) {
  if (not -e $epssrc) {      # This is needed because the newline is not always passed -> tex.
     my $localfile = $epssrc;      # At present we don't care about the sizing info.
     $localfile =~ s/.*(\/res)/$1/;  
     my $file;      my ($commentline, $restofstuff) = split(/\n/, $src);
     my $path;      $graphinclude = $src;
     if ($localfile =~ m!(.*)/([^/]*)$!) {      $graphinclude =~ s/^$commentline//;
  $file = $2;   } elsif (!($src =~ /\\/)) {
  $path = $1.'/';       my ($path,$file) = &Apache::londefdef::get_eps_image($src);
     }      my ($height_param,$width_param)=
     my $signal_eps = 0;   &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
     my @content_directory = &Apache::lonnet::dirlist($path);      $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
     for (my $iy=0;$iy<=$#content_directory;$iy++) {  
  my @tempo_array = split(/&/,$content_directory[$iy]);  
  $content_directory[$iy] = $tempo_array[0];  
  if ($file eq $tempo_array[0]) {  
     $signal_eps = 1;  
     last;  
  }  
     }  
     if ($signal_eps) {  
  my $eps_file = &Apache::lonnet::getfile($localfile);  
     } else {  
  $localfile = $src;  
  $localfile =~ s/.*(\/res)/$1/;  
  my $as = &Apache::lonnet::getfile($src);        
     }  
  }  
  my $file;  
  my $path;  
  if ($src =~ m!(.*)/([^/]*)$!) {  
     $file = $2;  
     $path = $1.'/';   
  }  
  my $newsrc = $src;  
  $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;  
  $file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;  
  #do we have any specified size of the picture?  
  my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);   
  my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);   
  my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);  
  if ($TeXwidth ne '') {   
     $width_param = $TeXwidth;   
  } elsif ($TeXheight ne '') {   
     $width_param = $TeXheight/$height_param*$width_param;  
  } elsif ($width ne '') {  
     $width_param = $width*$scaling;        
  }  
  #where can we find the picture?  
  if (-e $newsrc) {  
     if ($path) {  
  $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';  
     }  
  } else {   } else {
     my $temp_file;      $graphinclude = $src;   # Already fully formed.
     my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";  
     $temp_file = Apache::File->new('>>'.$filename);   
     print $temp_file "$src\n";  
     $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';  
  }   }
    $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
     }       } 
     return $result;      return $result;
 }  }
Line 469  sub start_rectangle { Line 823  sub start_rectangle {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
  $target eq 'analyze') {    $target eq 'analyze' || $target eq 'answer') { 
  &Apache::lonxml::startredirection;    &Apache::lonxml::startredirection; 
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);   my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
  $result=&Apache::edit::tag_start($target,$token,'Rectangle').   $result=&Apache::edit::tag_start($target,$token,'Rectangle').
     &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).      &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
     &Apache::edit::entercoordpair(undef,'textnode').      &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
     &Apache::edit::end_row();      &Apache::edit::end_row();
     } elsif ($target eq "modified") {      } elsif ($target eq "modified") {
    &Apache::edit::deletecoorddata();
  $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);   $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
     }      }
     return $result;      return $result;
Line 486  sub start_rectangle { Line 841  sub start_rectangle {
 sub grade_rectangle {  sub grade_rectangle {
     my ($spec,$x,$y) = @_;      my ($spec,$x,$y) = @_;
     &Apache::lonxml::debug("Spec is $spec");      &Apache::lonxml::debug("Spec is $spec");
     $spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;      my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
     my $x1=$1;  
     my $y1=$2;  
     my $x2=$3;  
     my $y2=$4;  
     &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");      &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
     if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }      if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
     if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }      if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
Line 504  sub end_rectangle { Line 855  sub end_rectangle {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
  $target eq 'analyze') {   $target eq 'analyze' || $target eq 'answer') {
  my $name = $Apache::imageresponse::curname;   my $name = $Apache::imageresponse::curname;
  my $area = &Apache::lonxml::endredirection;   my $area = &Apache::lonxml::endredirection;
    $area=~s/\s//g;
  &Apache::lonxml::debug("out is $area for $name");   &Apache::lonxml::debug("out is $area for $name");
  if ( $Apache::imageresponse::conceptgroup   if ( $Apache::imageresponse::conceptgroup
      && !&Apache::response::showallfoils()) {       && !&Apache::response::showallfoils()
        ) {
     push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";      push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
  } else {   } else {
     push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";      push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
  }   }
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result=&Apache::edit::end_table();   $result=&Apache::edit::end_table();
       }
       return $result;
   }
   
   sub start_polygon {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result='';
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze' || $target eq 'answer') { 
    &Apache::lonxml::startredirection; 
       } elsif ($target eq 'edit') {
    my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
    $result=&Apache::edit::tag_start($target,$token,'Polygon').
       &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
       &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
       &Apache::edit::end_row();
       } elsif ($target eq "modified") {
    $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
       }
       return $result;
   }
   
   sub grade_polygon {
       my ($spec,$x,$y) = @_;
       &Apache::lonxml::debug("Spec is $spec");
       $spec=~s/^polygon://;
       my @polygon;
       foreach my $coord (split('-',$spec)) {
    my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
    &Apache::lonxml::debug("x $x y $y");
    push @polygon, {'x'=>$x,'y'=>$y};
       }
       #make end point start point
       push @polygon, $polygon[0];
       # cribbed from
       # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
       my $crossing = 0;    # the crossing number counter
   
       # loop through all edges of the polygon
       for (my $i=0; $i<$#polygon; $i++) {    # edge from V[i] to V[i+1]
    if ((($polygon[$i]->{'y'} <= $y)
        && ($polygon[$i+1]->{'y'} > $y))    # an upward crossing
       || 
       (($polygon[$i]->{'y'} > $y) 
        && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
       # compute the actual edge-ray intersect x-coordinate
               my $vt = ($y - $polygon[$i]->{'y'}) 
    / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
               if ($x < $polygon[$i]->{'x'} + $vt * 
    ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
                   $crossing++;   # a valid crossing of y=P.y right of P.x
       }
    }
       }
   
       # 0 if even (out), and 1 if odd (in)
       if ($crossing%2) {
    return 'APPROX_ANS';
       } else {
    return 'INCORRECT';
       }
   }
   
   sub end_polygon {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze' || $target eq 'answer') {
    my $name = $Apache::imageresponse::curname;
    my $area = &Apache::lonxml::endredirection;
    $area=~s/\s*//g;
    &Apache::lonxml::debug("out is $area for $name");
    if ( $Apache::imageresponse::conceptgroup
        && !&Apache::response::showallfoils()
        ) {
       push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
    } else {
       push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
     }      }
     return $result;      return $result;
 }  }
Removed from v.1.42  
changed lines
  Added in v.1.105

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
500 Internal Server Error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.