version 1.1, 2001/02/07 00:29:59
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version 1.65, 2005/04/07 06:56:21
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# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# iimage click response style |
# image click response style |
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# |
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# $Id$ |
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# |
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# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
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# |
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#FIXME LATER assumes multiple possible submissions but only one is possible |
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#currently |
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package Apache::imageresponse; |
package Apache::imageresponse; |
use strict; |
use strict; |
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use Image::Magick(); |
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use Apache::randomlylabel(); |
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use Apache::londefdef(); |
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use Apache::Constants qw(:common :http); |
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use Apache::lonlocal; |
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use Apache::lonnet; |
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sub BEGIN { |
BEGIN { |
&Apache::lonxml::register('Apache::imageresponse',('imageresponse')); |
&Apache::lonxml::register('Apache::imageresponse',('imageresponse')); |
} |
} |
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sub start_imageresponse { |
sub start_imageresponse { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
#when in a radiobutton response use these |
my $result; |
&Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle')); |
#when in a radiobutton response use these |
my $id = &Apache::response::start_response($parstack,$safeeval); |
&Apache::lonxml::register('Apache::imageresponse', |
return ''; |
('foilgroup','foil','text','image','rectangle', |
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'polygon','conceptgroup')); |
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push (@Apache::lonxml::namespace,'imageresponse'); |
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my $id = &Apache::response::start_response($parstack,$safeeval); |
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undef(%Apache::response::foilnames); |
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if ($target eq 'meta') { |
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$result=&Apache::response::meta_package_write('imageresponse'); |
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} elsif ($target eq 'analyze') { |
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my $part_id="$Apache::inputtags::part.$id"; |
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push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id); |
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} |
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return $result; |
} |
} |
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sub end_imageresponse { |
sub end_imageresponse { |
&Apache::response::end_response; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
return ''; |
&Apache::response::end_response; |
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pop @Apache::lonxml::namespace; |
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&Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup')); |
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my $result; |
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if ($target eq 'edit') { $result=&Apache::edit::end_table(); } |
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undef(%Apache::response::foilnames); |
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return $result; |
} |
} |
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%Apache::response::foilgroup={}; |
%Apache::response::foilgroup=(); |
sub start_foilgroup { |
sub start_foilgroup { |
%Apache::response::foilgroup={}; |
%Apache::response::foilgroup=(); |
return ''; |
$Apache::imageresponse::conceptgroup=0; |
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&Apache::response::pushrandomnumber(); |
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return ''; |
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} |
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sub getfoilcounts { |
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my ($parstack,$safeeval)=@_; |
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my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2'); |
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# +1 since instructors will count from 1 |
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my $count = $#{ $Apache::response::foilgroup{'names'} }+1; |
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#if (&Apache::response::showallfoils()) { $max=$count; } |
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return ($count,$max); |
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} |
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sub whichfoils { |
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my ($max)=@_; |
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if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; } |
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my @names = @{ $Apache::response::foilgroup{'names'} }; |
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my @whichopt =(); |
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while ((($#whichopt+1) < $max) && ($#names > -1)) { |
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&Apache::lonxml::debug("Have $#whichopt max is $max"); |
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my $aopt; |
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# if (&Apache::response::showallfoils()) { |
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# $aopt=0; |
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# } else { |
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$aopt=int(&Math::Random::random_uniform() * ($#names+1)); |
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# } |
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&Apache::lonxml::debug("From $#names elms, picking $aopt"); |
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$aopt=splice(@names,$aopt,1); |
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&Apache::lonxml::debug("Picked $aopt"); |
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push (@whichopt,$aopt); |
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} |
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return @whichopt; |
} |
} |
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sub setrandomnumber { |
sub prep_image { |
my $rndseed=&Apache::lonnet::rndseed(); |
my ($image,$mode,$name)=@_; |
$rndseed=unpack("%32i",$rndseed); |
my $part=$Apache::inputtags::part; |
$rndseed=$rndseed |
my $respid=$Apache::inputtags::response['-1']; |
+&Apache::lonnet::numval($Apache::inputtags::part) |
my $id=&Apache::loncommon::get_cgi_id(); |
+&Apache::lonnet::numval($Apache::inputtags::response['-1']); |
my (%x,$i); |
srand($rndseed); |
$x{"cgi.$id.BGIMG"}=&Apache::lonnet::escape($image); |
return ''; |
my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"}); |
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#draws 2 xs on the image at the clicked location |
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#one in white and then one in red on top of the one in white |
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if (defined($x) && $x=~/\S/ && defined($y) && $y =~/\S/ && !&Apache::response::show_answer()) { |
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my $length = 6; |
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my $width = 1; |
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my $extrawidth = 2; |
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my $xmin=($x-$length); |
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my $xmax=($x+$length); |
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my $ymin=($y-$length); |
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my $ymax=($y+$length); |
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$x{"cgi.$id.OBJTYPE"}.='LINE:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax), |
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"FFFFFF",($width+$extrawidth))); |
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$x{"cgi.$id.OBJTYPE"}.='LINE:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin), |
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"FFFFFF",($width+$extrawidth))); |
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$x{"cgi.$id.OBJTYPE"}.='LINE:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax), |
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"FF0000",($width))); |
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$x{"cgi.$id.OBJTYPE"}.='LINE:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin), |
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"FF0000",($width))); |
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} |
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if ($mode eq 'answer') { |
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my $width = 1; |
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my $extrawidth = 2; |
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my @areas = @{ $Apache::response::foilgroup{"$name.area"} }; |
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foreach my $area (@areas) { |
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if ($area=~/^rectangle:/) { |
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$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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my ($x1,$y1,$x2,$y2)= |
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($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/); |
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$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF", |
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($width+$extrawidth))); |
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$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width)); |
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} elsif ($area=~/^polygon:(.*)/) { |
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$x{"cgi.$id.OBJTYPE"}.='POLYGON:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth))); |
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$x{"cgi.$id.OBJEXTRA$i"}=$1; |
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$x{"cgi.$id.OBJTYPE"}.='POLYGON:'; |
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$i=$x{"cgi.$id.OBJCOUNT"}++; |
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$x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width)); |
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$x{"cgi.$id.OBJEXTRA$i"}=$1; |
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} |
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} |
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} |
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&Apache::lonnet::appenv(%x); |
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return $id; |
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} |
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sub displayfoils { |
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my ($target,@whichopt) = @_; |
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my $result =''; |
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my $name; |
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my $temp=1; |
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foreach $name (@whichopt) { |
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$result.=$Apache::response::foilgroup{"$name.text"}; |
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&Apache::lonxml::debug("Text is $result"); |
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if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";} |
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my $image=$Apache::response::foilgroup{"$name.image"}; |
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&Apache::lonxml::debug("image is $image"); |
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if ( $target eq 'web' && $image !~ /^http:/ ) { |
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$image=&clean_up_image($image); |
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} |
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&Apache::lonxml::debug("image is $image"); |
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if ( &Apache::response::show_answer() ) { |
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if ($target eq 'tex') { |
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$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n"; |
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} else { |
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my $token=&prep_image($image,'answer',$name); |
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$result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n"; |
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} |
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} else { |
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if ($target eq 'tex') { |
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$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n"; |
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} else { |
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my $id=$Apache::inputtags::response['-1']; |
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my $token=&prep_image($image); |
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my $temp=1; |
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$result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ". |
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"src=\"/adm/randomlabel.png?token=$token\" /><br />\n"; |
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} |
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} |
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$temp++; |
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} |
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return $result; |
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} |
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sub clean_up_image { |
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my ($image)=@_; |
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if ($image =~ /\s*<img\s*/) { |
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($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i); |
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if ($image !~ /^http:/) { |
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$image=&Apache::lonnet::hreflocation('',$image); |
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} |
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if (!$image) { |
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$image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif'; |
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} |
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} else { |
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$image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image); |
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if (&Apache::lonnet::repcopy($image) ne 'ok') { |
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$image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif'; |
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} |
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} |
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return $image; |
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} |
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sub gradefoils { |
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my (@whichopt) = @_; |
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my $x; |
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my $y; |
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my $result; |
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my $id=$Apache::inputtags::response['-1']; |
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my $temp=1; |
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foreach my $name (@whichopt) { |
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$x=$env{"form.HWVAL_$id:$temp.x"}; |
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$y=$env{"form.HWVAL_$id:$temp.y"}; |
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&Apache::lonxml::debug("Got a x of $x and a y of $y for $name"); |
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if (defined($x) && defined($y) && |
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defined(@{ $Apache::response::foilgroup{"$name.area"} })) { |
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my @areas = @{ $Apache::response::foilgroup{"$name.area"} }; |
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my $grade="INCORRECT"; |
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foreach my $area (@areas) { |
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&Apache::lonxml::debug("Area is $area for $name"); |
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$area =~ m/([a-z]*):/; |
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&Apache::lonxml::debug("Area of type $1"); |
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if ($1 eq 'rectangle') { |
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$grade=&grade_rectangle($area,$x,$y); |
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} elsif ($1 eq 'polygon') { |
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$grade=&grade_polygon($area,$x,$y); |
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} else { |
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&Apache::lonxml::error("Unknown area style $area"); |
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} |
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&Apache::lonxml::debug("Area said $grade"); |
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if ($grade eq 'APPROX_ANS') { last; } |
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} |
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&Apache::lonxml::debug("Foil was $grade"); |
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if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; } |
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if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; } |
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&Apache::lonxml::debug("Question is $result"); |
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$temp++; |
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} |
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} |
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my $responsestr="$x:$y"; |
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my $part=$Apache::inputtags::part; |
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my %previous=&Apache::response::check_for_previous($responsestr,$part,$id); |
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if ($result |
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&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; } |
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&Apache::response::handle_previous(\%previous,$result); |
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$Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr; |
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$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result; |
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return ''; |
} |
} |
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sub end_foilgroup { |
sub end_foilgroup { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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my $result=''; |
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my @whichopt; |
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if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || |
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$target eq 'analyze') { |
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my ($count,$max) = &getfoilcounts($parstack,$safeeval); |
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if ($count>$max) { $count=$max } |
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&Apache::lonxml::debug("Count is $count from $max"); |
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@whichopt = &whichfoils($max); |
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if ($target eq 'web' || $target eq 'tex') { |
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$result=&displayfoils($target,@whichopt); |
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} elsif ($target eq 'grade') { |
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if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); } |
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} elsif ( $target eq 'analyze') { |
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&Apache::response::analyze_store_foilgroup(\@whichopt, |
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['text','image','area']); |
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} |
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} elsif ($target eq 'edit') { |
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$result=&Apache::edit::end_table(); |
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} |
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&Apache::response::poprandomnumber(); |
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return $result; |
} |
} |
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sub start_conceptgroup { |
sub start_conceptgroup { |
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$Apache::imageresponse::conceptgroup=1; |
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%Apache::response::conceptgroup=(); |
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return ''; |
} |
} |
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sub end_conceptgroup { |
sub end_conceptgroup { |
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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$Apache::imageresponse::conceptgroup=0; |
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my $result; |
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if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || |
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$target eq 'analyze') { |
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&Apache::response::pick_foil_for_concept($target, |
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['area','text','image'], |
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\%Apache::hint::image, |
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$parstack,$safeeval); |
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} elsif ($target eq 'edit') { |
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$result=&Apache::edit::end_table(); |
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} |
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return $result; |
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} |
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sub insert_foil { |
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return ' |
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<foil> |
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<image></image> |
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<text></text> |
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<rectangle></rectangle> |
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</foil> |
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'; |
} |
} |
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$Apache::imageresponse::curname=''; |
$Apache::imageresponse::curname=''; |
sub start_foil { |
sub start_foil { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
if ($target eq 'web' || $target eq 'grade') { |
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || |
my $args =''; |
$target eq 'analyze') { |
if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; } |
my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval); |
my $name = &Apache::run::run("{$args;".'return $name}',$safeeval); |
if (!$name) { |
push @{ $Apache::response::foilgroup{'names'} }, $name; |
&Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction."); |
$Apache::imageresponse::curname=$name; |
$name=$Apache::lonxml::curdepth; |
} |
} |
return ''; |
if (defined($Apache::response::foilnames{$name})) { |
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&Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name)); |
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} |
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$Apache::response::foilnames{$name}++; |
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if ( $Apache::imageresponse::conceptgroup |
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#&& !&Apache::response::showallfoils() |
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) { |
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push(@{ $Apache::response::conceptgroup{'names'} }, $name); |
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} else { |
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push(@{ $Apache::response::foilgroup{'names'} }, $name); |
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} |
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$Apache::imageresponse::curname=$name; |
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} |
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return ''; |
} |
} |
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sub end_foil { |
sub end_foil { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
return ''; |
my $result; |
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if ($target eq 'edit') { |
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$result=&Apache::edit::end_table(); |
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} |
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return $result; |
} |
} |
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sub start_text { |
sub start_text { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
if ($target eq 'web') { |
my $result=''; |
$Apache::lonxml::redirection--; |
if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { |
} |
&Apache::lonxml::startredirection; |
return ''; |
} elsif ($target eq 'edit') { |
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my $descr=&Apache::lonxml::get_all_text('/text',$parser); |
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$result=&Apache::edit::tag_start($target,$token,'Task Description'). |
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&Apache::edit::editfield($token->[1],$descr,'Text',60,2). |
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&Apache::edit::end_row(); |
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} elsif ($target eq "modified") { |
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$result=$token->[4].&Apache::edit::modifiedfield('/text',$parser); |
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} |
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return $result; |
} |
} |
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sub end_text { |
sub end_text { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
if ($target eq 'web') { |
my $result; |
my $name = $Apache::imageresponse::curname; |
if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { |
$Apache::response::foilgroup{"$name.text"} = $Apache::lonxml::outputstack; |
my $name = $Apache::imageresponse::curname; |
if ($target eq 'web' ) { |
if ( $Apache::imageresponse::conceptgroup |
$Apache::lonxml::redirection++; |
#&& !&Apache::response::showallfoils() |
if ($Apache::lonxml::redirection == 1) { |
) { |
$Apache::lonxml::outputstack=''; |
$Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection; |
} |
} else { |
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$Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection; |
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} |
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} elsif ($target eq 'edit') { |
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$result=&Apache::edit::end_table(); |
} |
} |
} |
return $result; |
return ''; |
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} |
} |
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sub start_image { |
sub start_image { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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my $result=''; |
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if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { |
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&Apache::lonxml::startredirection; |
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} elsif ($target eq 'edit') { |
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my $bgimg=&Apache::lonxml::get_all_text('/image',$parser); |
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$Apache::edit::bgimgsrc=$bgimg; |
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$Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth; |
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|
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$result=&Apache::edit::tag_start($target,$token,'Clickable Image'). |
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&Apache::edit::editline($token->[1],$bgimg,'Image Source File',40); |
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$result.=&Apache::edit::browse(undef,'textnode').' '; |
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$result.=&Apache::edit::search(undef,'textnode'). |
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&Apache::edit::end_row(); |
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} elsif ($target eq "modified") { |
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$result=$token->[4].&Apache::edit::modifiedfield('/image',$parser); |
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} |
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return $result; |
} |
} |
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sub end_image { |
sub end_image { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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my $result; |
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my $name = $Apache::imageresponse::curname; |
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if ($target eq 'web') { |
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my $image = &Apache::lonxml::endredirection(); |
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&Apache::lonxml::debug("original image is $image"); |
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if ( $Apache::imageresponse::conceptgroup |
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#&& !&Apache::response::showallfoils() |
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) { |
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$Apache::response::conceptgroup{"$name.image"} = $image; |
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} else { |
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$Apache::response::foilgroup{"$name.image"} = $image; |
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} |
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} elsif ($target eq 'analyze') { |
|
my $image = &Apache::lonxml::endredirection(); |
|
if ( $Apache::imageresponse::conceptgroup |
|
#&& !&Apache::response::showallfoils() |
|
) { |
|
$Apache::response::conceptgroup{"$name.image"} = $image; |
|
} else { |
|
$Apache::response::foilgroup{"$name.image"} = $image; |
|
} |
|
} elsif ($target eq 'edit') { |
|
$result=&Apache::edit::end_table(); |
|
} elsif ($target eq 'tex') { |
|
my $src = &Apache::lonxml::endredirection(); |
|
my ($path,$file) = &Apache::londefdef::get_eps_image($src); |
|
my ($height_param,$width_param)= |
|
&Apache::londefdef::image_size($src,0.3,$parstack,$safeeval); |
|
$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} '; |
|
} |
|
return $result; |
} |
} |
|
|
sub start_rectangle { |
sub start_rectangle { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
my $result=''; |
|
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || |
|
$target eq 'analyze') { |
|
&Apache::lonxml::startredirection; |
|
} elsif ($target eq 'edit') { |
|
my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser); |
|
$result=&Apache::edit::tag_start($target,$token,'Rectangle'). |
|
&Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40). |
|
&Apache::edit::entercoord(undef,'textnode',undef,undef,'box'). |
|
&Apache::edit::end_row(); |
|
} elsif ($target eq "modified") { |
|
&Apache::edit::deletecoorddata(); |
|
$result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser); |
|
} |
|
return $result; |
|
} |
|
|
|
sub grade_rectangle { |
|
my ($spec,$x,$y) = @_; |
|
&Apache::lonxml::debug("Spec is $spec"); |
|
my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/); |
|
&Apache::lonxml::debug("Point $x1,$y1,$x2,$y2"); |
|
if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; } |
|
if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; } |
|
if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) { |
|
return 'APPROX_ANS'; |
|
} |
|
return 'INCORRECT'; |
} |
} |
|
|
sub end_rectangle { |
sub end_rectangle { |
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
|
my $result; |
|
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || |
|
$target eq 'analyze') { |
|
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"} },"rectangle:$area"; |
|
} else { |
|
push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area"; |
|
} |
|
} elsif ($target eq 'edit') { |
|
$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' || |
|
$target eq 'analyze') { |
|
&Apache::lonxml::startredirection; |
|
} elsif ($target eq 'edit') { |
|
my $coords=&Apache::lonxml::get_all_text('/polygon',$parser); |
|
$result=&Apache::edit::tag_start($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') { |
|
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; |
} |
} |
1; |
1; |
__END__ |
__END__ |