Annotation of loncom/homework/imageresponse.pm, revision 1.62
1.58 albertel 1:
1.12 albertel 2: # The LearningOnline Network with CAPA
1.14 albertel 3: # image click response style
4: #
1.62 ! albertel 5: # $Id: imageresponse.pm,v 1.61 2005/01/31 23:09:55 albertel Exp $
1.14 albertel 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
1.25 www 29: #FIXME LATER assumes multiple possible submissions but only one is possible
30: #currently
1.3 albertel 31:
1.1 albertel 32: package Apache::imageresponse;
33: use strict;
1.51 albertel 34: use Image::Magick();
35: use Apache::randomlylabel();
36: use Apache::londefdef();
1.40 albertel 37: use Apache::Constants qw(:common :http);
1.51 albertel 38: use Apache::lonlocal;
1.1 albertel 39:
1.16 harris41 40: BEGIN {
1.36 albertel 41: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
1.1 albertel 42: }
43:
44: sub start_imageresponse {
1.36 albertel 45: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
46: my $result;
47: #when in a radiobutton response use these
1.43 albertel 48: &Apache::lonxml::register('Apache::imageresponse',
49: ('foilgroup','foil','text','image','rectangle',
50: 'polygon','conceptgroup'));
1.36 albertel 51: push (@Apache::lonxml::namespace,'imageresponse');
52: my $id = &Apache::response::start_response($parstack,$safeeval);
1.51 albertel 53: undef(%Apache::response::foilnames);
1.36 albertel 54: if ($target eq 'meta') {
55: $result=&Apache::response::meta_package_write('imageresponse');
1.37 albertel 56: } elsif ($target eq 'analyze') {
57: my $part_id="$Apache::inputtags::part.$id";
58: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
1.36 albertel 59: }
60: return $result;
1.1 albertel 61: }
62:
63: sub end_imageresponse {
1.30 albertel 64: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
65: &Apache::response::end_response;
66: pop @Apache::lonxml::namespace;
67: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
68: my $result;
69: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1.51 albertel 70: undef(%Apache::response::foilnames);
1.30 albertel 71: return $result;
1.1 albertel 72: }
73:
1.20 albertel 74: %Apache::response::foilgroup=();
1.1 albertel 75: sub start_foilgroup {
1.36 albertel 76: %Apache::response::foilgroup=();
77: $Apache::imageresponse::conceptgroup=0;
1.53 albertel 78: &Apache::response::pushrandomnumber();
1.36 albertel 79: return '';
1.1 albertel 80: }
81:
1.2 albertel 82: sub getfoilcounts {
1.36 albertel 83: my ($parstack,$safeeval)=@_;
1.12 albertel 84:
1.36 albertel 85: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
86: # +1 since instructors will count from 1
87: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
1.56 albertel 88: #if (&Apache::response::showallfoils()) { $max=$count; }
1.36 albertel 89: return ($count,$max);
1.2 albertel 90: }
91:
92: sub whichfoils {
1.36 albertel 93: my ($max)=@_;
94: if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
95: my @names = @{ $Apache::response::foilgroup{'names'} };
96: my @whichopt =();
97: while ((($#whichopt+1) < $max) && ($#names > -1)) {
98: &Apache::lonxml::debug("Have $#whichopt max is $max");
99: my $aopt;
1.56 albertel 100: # if (&Apache::response::showallfoils()) {
101: # $aopt=0;
102: # } else {
1.36 albertel 103: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
1.56 albertel 104: # }
1.36 albertel 105: &Apache::lonxml::debug("From $#names elms, picking $aopt");
106: $aopt=splice(@names,$aopt,1);
107: &Apache::lonxml::debug("Picked $aopt");
108: push (@whichopt,$aopt);
109: }
110: return @whichopt;
1.2 albertel 111: }
112:
1.40 albertel 113: sub prep_image {
1.42 albertel 114: my ($image,$mode,$name)=@_;
1.40 albertel 115: my $part=$Apache::inputtags::part;
1.41 albertel 116: my $respid=$Apache::inputtags::response['-1'];
117: my $id=&Apache::loncommon::get_cgi_id();
1.49 albertel 118: my (%x,$i);
1.47 albertel 119: $x{"cgi.$id.BGIMG"}=&Apache::lonnet::escape($image);
1.41 albertel 120: my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
1.40 albertel 121: #draws 2 xs on the image at the clicked location
122: #one in white and then one in red on top of the one in white
1.58 albertel 123: if (defined($x) && $x=~/\S/ && defined($y) && $y =~/\S/ && !&Apache::response::show_answer()) {
1.40 albertel 124: my $length = 6;
125: my $width = 1;
126: my $extrawidth = 2;
1.48 albertel 127: my $xmin=($x-$length);
128: my $xmax=($x+$length);
129: my $ymin=($y-$length);
130: my $ymax=($y+$length);
131:
1.49 albertel 132: $x{"cgi.$id.OBJTYPE"}.='LINE:';
133: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 134: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49 albertel 135: "FFFFFF",($width+$extrawidth)));
136: $x{"cgi.$id.OBJTYPE"}.='LINE:';
137: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 138: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49 albertel 139: "FFFFFF",($width+$extrawidth)));
140: $x{"cgi.$id.OBJTYPE"}.='LINE:';
141: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 142: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49 albertel 143: "FF0000",($width)));
144: $x{"cgi.$id.OBJTYPE"}.='LINE:';
145: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 146: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49 albertel 147: "FF0000",($width)));
1.40 albertel 148: }
1.42 albertel 149: if ($mode eq 'answer') {
150: my $width = 1;
151: my $extrawidth = 2;
152: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
153: foreach my $area (@areas) {
1.43 albertel 154: if ($area=~/^rectangle:/) {
1.49 albertel 155: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
156: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.43 albertel 157: my ($x1,$y1,$x2,$y2)=
158: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.49 albertel 159: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
1.43 albertel 160: ($width+$extrawidth)));
1.49 albertel 161: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
162: $i=$x{"cgi.$id.OBJCOUNT"}++;
163: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
1.43 albertel 164: } elsif ($area=~/^polygon:(.*)/) {
1.49 albertel 165: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
166: $i=$x{"cgi.$id.OBJCOUNT"}++;
167: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
168: $x{"cgi.$id.OBJEXTRA$i"}=$1;
169: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
170: $i=$x{"cgi.$id.OBJCOUNT"}++;
171: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
172: $x{"cgi.$id.OBJEXTRA$i"}=$1;
1.43 albertel 173: }
1.42 albertel 174: }
175: }
1.41 albertel 176: &Apache::lonnet::appenv(%x);
177: return $id;
1.40 albertel 178: }
179:
1.2 albertel 180: sub displayfoils {
1.36 albertel 181: my ($target,@whichopt) = @_;
182: my $result ='';
183: my $name;
184: my $temp=1;
185: foreach $name (@whichopt) {
186: $result.=$Apache::response::foilgroup{"$name.text"};
187: &Apache::lonxml::debug("Text is $result");
188: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
189: my $image=$Apache::response::foilgroup{"$name.image"};
190: &Apache::lonxml::debug("image is $image");
1.40 albertel 191: if ( $target eq 'web' && $image !~ /^http:/ ) {
1.47 albertel 192: $image=&clean_up_image($image);
193: }
1.40 albertel 194: &Apache::lonxml::debug("image is $image");
1.36 albertel 195: if ( &Apache::response::show_answer() ) {
196: if ($target eq 'tex') {
197: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
198: } else {
1.42 albertel 199: my $token=&prep_image($image,'answer',$name);
1.40 albertel 200: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36 albertel 201: }
202: } else {
203: if ($target eq 'tex') {
204: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
205: } else {
1.40 albertel 206: my $id=$Apache::inputtags::response['-1'];
207: my $token=&prep_image($image);
208: my $temp=1;
209: $result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
210: "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36 albertel 211: }
212: }
213: $temp++;
214: }
215: return $result;
1.47 albertel 216: }
217:
218: sub clean_up_image {
219: my ($image)=@_;
220: if ($image =~ /\s*<img\s*/) {
1.50 albertel 221: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
1.47 albertel 222: if ($image !~ /^http:/) {
223: $image=&Apache::lonnet::hreflocation('',$image);
224: }
225: if (!$image) {
226: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
227: }
228: } else {
229: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
230: if (&Apache::lonnet::repcopy($image) ne OK) {
231: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
232: }
233: }
234: return $image;
1.2 albertel 235: }
236:
1.3 albertel 237: sub gradefoils {
1.36 albertel 238: my (@whichopt) = @_;
239: my $x;
240: my $y;
241: my $result;
242: my $id=$Apache::inputtags::response['-1'];
243: my $temp=1;
244: foreach my $name (@whichopt) {
245: $x=$ENV{"form.HWVAL_$id:$temp.x"};
246: $y=$ENV{"form.HWVAL_$id:$temp.y"};
247: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
248: if (defined($x) && defined($y) &&
249: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
250: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
251: my $grade="INCORRECT";
252: foreach my $area (@areas) {
253: &Apache::lonxml::debug("Area is $area for $name");
254: $area =~ m/([a-z]*):/;
255: &Apache::lonxml::debug("Area of type $1");
256: if ($1 eq 'rectangle') {
257: $grade=&grade_rectangle($area,$x,$y);
1.43 albertel 258: } elsif ($1 eq 'polygon') {
259: $grade=&grade_polygon($area,$x,$y);
1.36 albertel 260: } else {
261: &Apache::lonxml::error("Unknown area style $area");
262: }
263: &Apache::lonxml::debug("Area said $grade");
264: if ($grade eq 'APPROX_ANS') { last; }
265: }
266: &Apache::lonxml::debug("Foil was $grade");
267: if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
268: if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
269: &Apache::lonxml::debug("Question is $result");
270: $temp++;
1.9 albertel 271: }
1.36 albertel 272: }
1.60 albertel 273: my $responsestr="$x:$y";
274: my $part=$Apache::inputtags::part;
275: my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
1.56 albertel 276: if ($result
277: && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
1.60 albertel 278: &Apache::response::handle_previous(\%previous,$result);
279: $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
280: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
1.36 albertel 281: return '';
1.3 albertel 282: }
283:
1.1 albertel 284: sub end_foilgroup {
1.36 albertel 285: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
286: my $result='';
287: my @whichopt;
1.38 albertel 288: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
289: $target eq 'analyze') {
1.36 albertel 290: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
291: if ($count>$max) { $count=$max }
292: &Apache::lonxml::debug("Count is $count from $max");
293: @whichopt = &whichfoils($max);
294: if ($target eq 'web' || $target eq 'tex') {
295: $result=&displayfoils($target,@whichopt);
296: } elsif ($target eq 'grade') {
297: if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
1.37 albertel 298: } elsif ( $target eq 'analyze') {
299: &Apache::response::analyze_store_foilgroup(\@whichopt,
300: ['text','image','area']);
301: }
1.36 albertel 302: } elsif ($target eq 'edit') {
303: $result=&Apache::edit::end_table();
304: }
1.53 albertel 305: &Apache::response::poprandomnumber();
1.36 albertel 306: return $result;
1.1 albertel 307: }
308:
309: sub start_conceptgroup {
1.36 albertel 310: $Apache::imageresponse::conceptgroup=1;
311: %Apache::response::conceptgroup=();
312: return '';
1.1 albertel 313: }
314:
315: sub end_conceptgroup {
1.36 albertel 316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
317: $Apache::imageresponse::conceptgroup=0;
318: my $result;
1.37 albertel 319: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
320: $target eq 'analyze') {
321: &Apache::response::pick_foil_for_concept($target,
322: ['area','text','image'],
323: \%Apache::hint::image,
324: $parstack,$safeeval);
1.36 albertel 325: } elsif ($target eq 'edit') {
326: $result=&Apache::edit::end_table();
327: }
328: return $result;
1.31 albertel 329: }
330:
331: sub insert_foil {
332: return '
333: <foil>
334: <image></image>
335: <text></text>
336: <rectangle></rectangle>
337: </foil>
338: ';
1.1 albertel 339: }
340:
1.12 albertel 341: $Apache::imageresponse::curname='';
1.1 albertel 342: sub start_foil {
1.36 albertel 343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.37 albertel 344: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
345: $target eq 'analyze') {
1.36 albertel 346: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
1.59 albertel 347: if (!$name) {
348: &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
349: $name=$Apache::lonxml::curdepth;
350: }
1.51 albertel 351: if (defined($Apache::response::foilnames{$name})) {
352: &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
353: }
1.52 albertel 354: $Apache::response::foilnames{$name}++;
1.36 albertel 355: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 356: #&& !&Apache::response::showallfoils()
357: ) {
1.36 albertel 358: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
359: } else {
360: push(@{ $Apache::response::foilgroup{'names'} }, $name);
361: }
362: $Apache::imageresponse::curname=$name;
363: }
364: return '';
1.1 albertel 365: }
366:
367: sub end_foil {
1.26 albertel 368: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
369: my $result;
370: if ($target eq 'edit') {
371: $result=&Apache::edit::end_table();
372: }
373: return $result;
1.1 albertel 374: }
375:
376: sub start_text {
1.36 albertel 377: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
378: my $result='';
1.37 albertel 379: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.36 albertel 380: &Apache::lonxml::startredirection;
381: } elsif ($target eq 'edit') {
382: my $descr=&Apache::lonxml::get_all_text('/text',$parser);
383: $result=&Apache::edit::tag_start($target,$token,'Task Description').
384: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
385: &Apache::edit::end_row();
386: } elsif ($target eq "modified") {
1.39 albertel 387: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
1.36 albertel 388: }
389: return $result;
1.1 albertel 390: }
391:
392: sub end_text {
1.36 albertel 393: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
394: my $result;
1.37 albertel 395: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.36 albertel 396: my $name = $Apache::imageresponse::curname;
397: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 398: #&& !&Apache::response::showallfoils()
399: ) {
1.36 albertel 400: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
401: } else {
402: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
403: }
404: } elsif ($target eq 'edit') {
405: $result=&Apache::edit::end_table();
406: }
407: return $result;
1.1 albertel 408: }
409:
410: sub start_image {
1.36 albertel 411: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
412: my $result='';
1.37 albertel 413: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.36 albertel 414: &Apache::lonxml::startredirection;
415: } elsif ($target eq 'edit') {
416: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
417: $Apache::edit::bgimgsrc=$bgimg;
418: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
419:
420: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
421: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
422: $result.=&Apache::edit::browse(undef,'textnode').' ';
423: $result.=&Apache::edit::search(undef,'textnode').
424: &Apache::edit::end_row();
425: } elsif ($target eq "modified") {
1.39 albertel 426: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
1.36 albertel 427: }
428: return $result;
1.1 albertel 429: }
430:
431: sub end_image {
1.36 albertel 432: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
433: my $result;
434: my $name = $Apache::imageresponse::curname;
435: if ($target eq 'web') {
1.62 ! albertel 436: my $image = &Apache::lonxml::endredirection();
1.36 albertel 437: &Apache::lonxml::debug("original image is $image");
1.37 albertel 438: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 439: #&& !&Apache::response::showallfoils()
440: ) {
1.37 albertel 441: $Apache::response::conceptgroup{"$name.image"} = $image;
442: } else {
443: $Apache::response::foilgroup{"$name.image"} = $image;
444: }
445: } elsif ($target eq 'analyze') {
1.62 ! albertel 446: my $image = &Apache::lonxml::endredirection();
1.36 albertel 447: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 448: #&& !&Apache::response::showallfoils()
449: ) {
1.36 albertel 450: $Apache::response::conceptgroup{"$name.image"} = $image;
451: } else {
452: $Apache::response::foilgroup{"$name.image"} = $image;
453: }
454: } elsif ($target eq 'edit') {
455: $result=&Apache::edit::end_table();
456: } elsif ($target eq 'tex') {
1.62 ! albertel 457: my $src = &Apache::lonxml::endredirection();
! 458: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
! 459: my ($height_param,$width_param)=
! 460: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
! 461: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
1.36 albertel 462: }
463: return $result;
1.1 albertel 464: }
465:
466: sub start_rectangle {
1.36 albertel 467: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
468: my $result='';
1.38 albertel 469: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
470: $target eq 'analyze') {
1.36 albertel 471: &Apache::lonxml::startredirection;
472: } elsif ($target eq 'edit') {
473: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
474: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
475: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
1.44 albertel 476: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
1.36 albertel 477: &Apache::edit::end_row();
478: } elsif ($target eq "modified") {
1.44 albertel 479: &Apache::edit::deletecoorddata();
1.39 albertel 480: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
1.36 albertel 481: }
482: return $result;
1.1 albertel 483: }
484:
1.3 albertel 485: sub grade_rectangle {
1.36 albertel 486: my ($spec,$x,$y) = @_;
487: &Apache::lonxml::debug("Spec is $spec");
1.43 albertel 488: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.36 albertel 489: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
490: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
491: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
492: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
493: return 'APPROX_ANS';
494: }
495: return 'INCORRECT';
1.3 albertel 496: }
497:
1.1 albertel 498: sub end_rectangle {
1.36 albertel 499: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
500: my $result;
1.38 albertel 501: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
502: $target eq 'analyze') {
1.36 albertel 503: my $name = $Apache::imageresponse::curname;
504: my $area = &Apache::lonxml::endredirection;
1.54 albertel 505: $area=~s/\s//g;
1.36 albertel 506: &Apache::lonxml::debug("out is $area for $name");
507: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 508: #&& !&Apache::response::showallfoils()
509: ) {
1.36 albertel 510: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
511: } else {
512: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
1.43 albertel 513: }
514: } elsif ($target eq 'edit') {
515: $result=&Apache::edit::end_table();
516: }
517: return $result;
518: }
519:
520: sub start_polygon {
521: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
522: my $result='';
523: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
524: $target eq 'analyze') {
525: &Apache::lonxml::startredirection;
526: } elsif ($target eq 'edit') {
527: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser);
528: $result=&Apache::edit::tag_start($target,$token,'Polygon').
529: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
1.44 albertel 530: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
1.43 albertel 531: &Apache::edit::end_row();
532: } elsif ($target eq "modified") {
533: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
534: }
535: return $result;
536: }
537:
538: sub grade_polygon {
539: my ($spec,$x,$y) = @_;
540: &Apache::lonxml::debug("Spec is $spec");
541: $spec=~s/^polygon://;
542: my @polygon;
543: foreach my $coord (split('-',$spec)) {
544: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
545: &Apache::lonxml::debug("x $x y $y");
546: push @polygon, {'x'=>$x,'y'=>$y};
547: }
548: #make end point start point
549: push @polygon, $polygon[0];
550: # cribbed from
551: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
552: my $crossing = 0; # the crossing number counter
553:
554: # loop through all edges of the polygon
555: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
556: if ((($polygon[$i]->{'y'} <= $y)
557: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
558: ||
559: (($polygon[$i]->{'y'} > $y)
560: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
561: # compute the actual edge-ray intersect x-coordinate
562: my $vt = ($y - $polygon[$i]->{'y'})
563: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
564: if ($x < $polygon[$i]->{'x'} + $vt *
565: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
566: $crossing++; # a valid crossing of y=P.y right of P.x
567: }
568: }
569: }
570:
571: # 0 if even (out), and 1 if odd (in)
572: if ($crossing%2) {
573: return 'APPROX_ANS';
574: } else {
575: return 'INCORRECT';
576: }
577: }
578:
579: sub end_polygon {
580: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
581: my $result;
582: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
583: $target eq 'analyze') {
584: my $name = $Apache::imageresponse::curname;
585: my $area = &Apache::lonxml::endredirection;
1.48 albertel 586: $area=~s/\s*//g;
1.43 albertel 587: &Apache::lonxml::debug("out is $area for $name");
588: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 589: #&& !&Apache::response::showallfoils()
590: ) {
1.43 albertel 591: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
592: } else {
593: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
1.36 albertel 594: }
595: } elsif ($target eq 'edit') {
596: $result=&Apache::edit::end_table();
597: }
598: return $result;
1.1 albertel 599: }
600: 1;
601: __END__
602:
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