Annotation of loncom/homework/functionplotresponse.pm, revision 1.32
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.32 ! www 4: # $Id: functionplotresponse.pm,v 1.31 2010/11/10 22:41:29 www Exp $
1.1 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::functionplotresponse;
30: use strict;
31: use Apache::response();
32: use Apache::lonlocal;
33: use Apache::lonnet;
34:
35: BEGIN {
1.25 www 36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline','functionplotrule'));
1.1 www 37: }
38:
1.5 www 39: #
40: # There can be a number of applets on a page, each called ggbApplet_$id,
41: # where $id is the "_"-concatenated part and responseid
42: #
43:
1.1 www 44: sub geogebra_startcode {
1.3 www 45: my ($id)=@_;
1.1 www 46: return (<<ENDSTARTCODE);
1.3 www 47: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.1 www 48: codebase="/adm/geogebra/" width="714" height="447" MAYSCRIPT>
49: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
50: ENDSTARTCODE
51: }
52:
53: sub geogebra_endcode {
1.2 www 54: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
55: }
56:
1.5 www 57: #
58: # This is the internal GeoGebra bytecode which defines the spline functions
59: #
1.2 www 60: sub geogebra_spline_program {
61: return (<<ENDSPLINEPROGRAM);
62: <param name="ggbBase64" value="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"/>
63: ENDSPLINEPROGRAM
64: }
65:
1.5 www 66: #
67: # The standard set of parameters inside <applet>
68: #
1.2 www 69: sub geogebra_default_parameters {
1.3 www 70: my ($id)=@_;
1.2 www 71: return(<<ENDDEFAULTPARAMETERS);
72: <param name="image" value="/adm/lonIcons/lonanim.gif" />
73: <param name="boxborder" value="false" />
74: <param name="centerimage" value="true" />
75: <param name="java_arguments" value="-Xmx512m" />
76: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_properties.jar" />
77: <param name="cache_version" value="3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0" />
78: <param name="framePossible" value="false" />
79:
80: <param name="showResetIcon" value="false" />
81: <param name="showAnimationButton" value="false" />
82: <param name="enableRightClick" value="false" />
83: <param name="errorDialogsActive" value="true" />
84: <param name="enableLabelDrags" value="false" />
85: <param name="showMenuBar" value="false" />
86: <param name="showToolBar" value="false" />
87: <param name="showToolBarHelp" value="false" />
88: <param name="showAlgebraInput" value="false" />
89: <param name="enableShiftDragZoom" value="false" />
90: <param name="allowRescaling" value="false" />
91: <param name="enableLabelDrags" value="false" />
1.3 www 92: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 93: ENDDEFAULTPARAMETERS
1.1 www 94: }
95:
1.5 www 96: #
97: # This subroutine is called by LON-CAPA at </problem>
98: # Each applet on the page will call function ggbOnInit when it is done loading
99: # This function in turn will call the respective function registered by start_init_script
100: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
101: #
102:
1.3 www 103: sub init_script {
1.16 www 104: if ($#Apache::functionplotresponse::callscripts>=0) {
105: my $script='';
106: foreach my $id (@Apache::functionplotresponse::callscripts) {
107: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
108: }
109: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.17 www 110: ") { setTimeout('ggbInitAll()',20) }";
1.16 www 111: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 112: return (<<ENDGGBINIT);
113: <script type="text/javascript">
114: // <![CDATA[
1.16 www 115: // Function that each applet will call when loaded
116: // It will pass "its" parameter
117: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 118: function ggbOnInit(param) {
1.16 www 119: $script
120: }
121: function ggbInitAll() {
1.17 www 122: $calls
1.3 www 123: }
124: // ]]>
125: </script>
126: ENDGGBINIT
127: }
128: }
129:
1.5 www 130: #
131: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 132: # Changes the hidden fields on the web page
1.5 www 133: #
134: sub update_script {
135: my ($id)=@_;
136: return (<<ENDUPDATESCRIPT);
137: <script type="text/javascript">
138: // <![CDATA[
139: function updatePointCoordinates_$id(coordinateName) {
140: var x = document.ggbApplet_$id.getXcoord(coordinateName);
141: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 142: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 144: }
145: // ]]>
146: </script>
147: ENDUPDATESCRIPT
148: }
149:
150: #
151: # Register the above update-handler for a variable
152: #
153:
154: sub update_register {
155: my ($id,$variable)=@_;
1.6 www 156: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
157: }
158:
159: #
160: # Set a coordinate variable
161: #
162: sub set_coordinate {
163: my ($id,$variable,$x,$y)=@_;
164: return (<<ENDSETVARIABLE);
1.9 www 165: document.ggbApplet_$id.evalCommand("$variable=($x,$y)");
1.6 www 166: ENDSETVARIABLE
167: }
168:
169: #
1.9 www 170: # Input field name for a coordinate variable
171: #
172:
173: sub field_name {
174: my ($id,$variable,$name)=@_;
175: return "HWVAL_$id\_$variable\_$name";
176: }
177:
178: #
179: # Generate an input field for a coordinate variable
180: #
181:
182: sub generate_input_field {
183: my ($id,$variable,$x,$y)=@_;
184: $Apache::functionplotresponse::inputfields.=
185: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
186: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
187: }
188:
189: #
1.6 www 190: # Initialize a new coordinate variable at set a listener on it
191: #
192: sub new_coordinate {
193: my ($id,$variable,$x,$y)=@_;
1.11 www 194: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 195: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
196: }
1.11 www 197: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 198: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
199: }
1.9 www 200: &generate_input_field($id,$variable,$x,$y);
1.6 www 201: return &set_coordinate($id,$variable,$x,$y).&update_register($id,$variable);
1.5 www 202: }
203:
204: #
205: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
206: # It then starts the right headers
207: #
1.3 www 208: sub start_init_script {
209: my ($id)=@_;
1.16 www 210: # Add id to the list of ggbInit_$id functions that need to be called
211: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 212: # ... and open this function
1.3 www 213: return (<<ENDSTARTINIT);
214: <script type="text/javascript">
215: // <![CDATA[
1.5 www 216: // variable that will eventually be passed back to the server
217: var coordinateMap_$id = [];
1.16 www 218: // flag for not loaded yet
219: var loaded_$id=false;
1.5 www 220: // Init-function for applet
1.3 www 221: function ggbInit_$id() {
222: ENDSTARTINIT
223: }
224:
1.5 www 225: #
226: # This sets the axes inside ggbInit_$id
227: #
228:
1.4 www 229: sub axes_script {
230: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
231: return (<<ENDAXESSCRIPT);
232: // changes (xmin, xmax, ymin, ymax)
233: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
234:
235: // makes the (x,y) axis (in)visible
236: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
237: // makes the grid (in)visible
238: document.ggbApplet_$id.setGridVisible($gvisible);
239: ENDAXESSCRIPT
240: }
241:
1.14 www 242: sub axes_label {
243: my ($id,$xlabel,$ylabel)=@_;
244: unless ($xlabel || $ylabel) { return ''; }
245: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
246: if ($xlabel) {
247: $return.=(<<ENDXAXISLABELSCRIPT);
248: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
249: document.ggbApplet_$id.setVisible("Xlabel",false);
250: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
251: ENDXAXISLABELSCRIPT
252: }
253: if ($ylabel) {
254: $return.=(<<ENDYAXISLABELSCRIPT);
255: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
256: document.ggbApplet_$id.setVisible("Ylabel",false);
257: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
258: ENDYAXISLABELSCRIPT
259: }
260: return $return;
261: }
262:
1.4 www 263: sub plot_script {
1.6 www 264: my ($id,$function,$fixed)=@_;
265: if ($fixed) {
266: # Use stupid trick to nail this to a location
1.14 www 267: # Oddly, it seems like only one plot cannot be nailed to a location
268: # Non-nailed-down plots apparently get overwritten
1.6 www 269: return (<<ENDPLOTSCRIPT);
270: document.ggbApplet_$id.evalCommand("a=1");
271: document.ggbApplet_$id.setVisible("a",false);
272: // This MUST be a DEPENDENT OBJECT in order to be locked down:
273: document.ggbApplet_$id.evalCommand("y=a*($function)");
1.4 www 274: ENDPLOTSCRIPT
1.6 www 275: } else {
276: return "document.ggbApplet_$id.evalCommand('y=$function')";
277: }
1.4 www 278: }
279:
1.5 www 280: #
1.7 www 281: # Subroutine that generates code for spline $label based on stored information
1.6 www 282: #
283:
284: sub generate_spline {
285: my ($id,$label)=@_;
286: my $result='';
1.7 www 287: my $order=$Apache::functionplotresponse::splineorder{$label};
288: my $x=$Apache::functionplotresponse::splineinitx{$label};
289: my $y=$Apache::functionplotresponse::splineinity{$label};
290: my $sx=$Apache::functionplotresponse::splinescalex{$label};
291: my $sy=$Apache::functionplotresponse::splinescaley{$label};
292: my @coords=();
293: foreach my $i (1..$order) {
294: $result.=&new_coordinate($id,$label.'P'.$i,$x,$y);
1.8 www 295: $x+=$sx/(2.*($order-1));
1.7 www 296: push(@coords,$label.'P'.$i);
297: $result.=&new_coordinate($id,$label.'S'.$i,$x,$y+$sy);
1.8 www 298: $x+=$sx/(2.*($order-1));
1.7 www 299: push(@coords,$label.'S'.$i);
300: }
301: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 302: return $result;
303: }
304: #
305: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 306: #
1.4 www 307: sub start_backgroundplot {
308: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
309: my $result='';
310: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
311: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.6 www 312: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
313:
1.4 www 314: unless ($function) { $function="0"; }
315: if ($target eq 'web') {
1.6 www 316: $result.=&plot_script($internalid,$function,$fixed);
1.13 www 317: } elsif ($target eq 'edit') {
318: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
319: &Apache::edit::text_arg('Function:','function',
320: $token,'16').
321: &Apache::edit::select_arg('Fixed location:','fixed',
322: ['yes','no'],$token).
323: &Apache::edit::end_row();
324: } elsif ($target eq 'modified') {
325: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
326: $safeeval,'function','fixed');
327: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
328: }
329: return $result;
1.4 www 330: }
331:
332: sub end_backgroundplot {
1.13 www 333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
334: my $result='';
335: if ($target eq 'edit') {
336: $result=&Apache::edit::end_table();
337: }
338: return $result;
1.6 www 339: }
340:
341: #
1.25 www 342: # <functionplotrule ... />
1.12 www 343: #
1.25 www 344: sub start_functionplotrule {
1.12 www 345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
346: my $result='';
1.24 www 347: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
348: $Apache::functionplotresponse::counter++;
349: if ($label=~/\W/) {
1.25 www 350: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 351: }
352: $label=~s/\W//gs;
353: unless ($label) {
354: $label='R'.$Apache::functionplotresponse::counter;
355: } else {
356: $label='R'.$label;
357: }
358: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 359: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 360: }
361:
362:
363: if ($target eq 'grade') {
364: # Simply remember - in order - for later
1.25 www 365: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
366: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 367: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 368: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 369: }
370: $beginninglabel=~s/\W//gs;
371: $endinglabel=~s/\W//gs;
372: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
373: $relationship=~s/\W//gs;
374: $relationship=lc($relationship);
375: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 376: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 377: $relationship='eq';
378: }
379: my $derivative=&Apache::lonxml::get_param('derivative',$parstack,$safeeval);
380: unless (($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 381: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 382: $derivative=0;
383: }
1.25 www 384: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 385: $label,
386: $derivative,
1.25 www 387: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 388: $beginninglabel,
1.25 www 389: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 390: $endinglabel,
391: $relationship,
392: &Apache::lonxml::get_param('value',$parstack,$safeeval)
393: )));
394: } elsif ($target eq 'edit') {
1.29 www 395: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
396: &Apache::edit::text_arg('Index:','index',
397: $token,'4').' '.
398: &Apache::edit::select_arg(&mt('Function:'),'derivative',
399: [['0','Function itself'],
400: ['1','First derivative'],
1.32 ! www 401: ['2','Second derivative']],$token).'<br />'.
1.30 www 402:
1.29 www 403: &Apache::edit::text_arg('(Initial) x-value:','xinitial',
1.30 www 404: $token,'4').
405: &Apache::edit::select_or_text_arg('(Initial) x-value label:','xinitiallabel',
1.32 ! www 406: [['start','Start of Plot']],$token,'8').'<br />'.
1.30 www 407:
408: &Apache::edit::text_arg('Optional final x-value for ranges:','xfinal',
409: $token,'4').
410: &Apache::edit::select_or_text_arg('Optional final x-value label:','xfinallabel',
1.32 ! www 411: [['end','End of Plot']],$token,'8').'<br />'.
1.30 www 412:
1.29 www 413: &Apache::edit::select_arg(&mt('Relationship:'),'relationship',
414: [['eq','equal'],
415: ['ne','not equal'],
416: ['ge','greater than or equal'],
417: ['gt','greater than'],
418: ['lt','less than'],
419: ['le','less than or equal']],$token).
420: $result.= &Apache::edit::select_or_text_arg('Value:','value',
421: [['undef','not defined']],$token,'4').
422: &Apache::edit::text_arg('Percent error:','percenterror',
423: $token,'4').
424: &Apache::edit::end_row();
425: } elsif ($target eq 'modified') {
426: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.30 www 427: $safeeval,'index','derivative','xinitial','xinitiallabel','xfinal','xfinallabel','relationship',
1.29 www 428: 'value','percenterror');
429: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 430: }
1.12 www 431: return $result;
432: }
433:
1.25 www 434: sub end_functionplotrule {
1.13 www 435: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
436: my $result='';
437: if ($target eq 'edit') {
438: $result=&Apache::edit::end_table();
439: }
440: return $result;
1.12 www 441: }
442:
443:
444: #
1.23 www 445: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 446: #
447: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
448: #
449: sub start_spline {
450: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 451: my $result='';
452: if ($target eq 'web') {
1.23 www 453: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 454: $Apache::functionplotresponse::counter++;
455: if ($label=~/\W/) {
1.23 www 456: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 457: }
458: $label=~s/\W//gs;
1.23 www 459: unless ($label) {
460: $label='S'.$Apache::functionplotresponse::counter;
461: } else {
462: $label='S'.$label;
463: }
1.13 www 464: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 465: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 466: }
467:
468: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
469: if ($order<2) { $order=2; }
470: if ($order>8) { $order=8; }
471: $Apache::functionplotresponse::splineorder{$label}=$order;
472:
473: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
474: unless ($x) { $x=0; }
475: $Apache::functionplotresponse::splineinitx{$label}=$x;
476:
477: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
478: unless ($y) { $y=0; }
479: $Apache::functionplotresponse::splineinity{$label}=$y;
480:
481: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
482: unless ($sx) { $sx=$order; }
483: $Apache::functionplotresponse::splinescalex{$label}=$sx;
484:
485: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
486: unless ($sy) { $sy=2; }
487: $Apache::functionplotresponse::splinescaley{$label}=$sy;
488: } elsif ($target eq 'edit') {
489: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 490: &Apache::edit::text_arg('Index:','index',
1.14 www 491: $token,'4').' '.
1.13 www 492: &Apache::edit::select_arg('Order:','order',
1.14 www 493: ['2','3','4','5','6','7','8','9'],$token).' '.
1.13 www 494: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 495: $token,'4').' '.
1.13 www 496: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 497: $token,'4').' '.
1.13 www 498: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 499: $token,'4').' '.
1.13 www 500: &Apache::edit::text_arg('Scale y:','scaley',
501: $token,'4').
502: &Apache::edit::end_row();
503: } elsif ($target eq 'modified') {
504: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 505: $safeeval,'index','order','initx','inity',
1.13 www 506: 'scalex','scaley');
507: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
508: }
509: return $result;
1.6 www 510: }
511:
512: sub end_spline {
1.13 www 513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
514: my $result='';
515: if ($target eq 'edit') {
516: $result=&Apache::edit::end_table();
517: }
518: return $result;
1.4 www 519: }
520:
1.3 www 521: sub end_init_script {
522: return (<<ENDENDINIT);
523: }
524: // ]]>
525: </script>
526: ENDENDINIT
527: }
528:
1.10 www 529: #
530: # Storing and restoring spline coordinates from part answers
531: #
532: sub decode_previous_answer {
533: my ($answer)=@_;
534: foreach my $coordinate (split(/\,/,$answer)) {
535: my ($key,$value)=split(/\=/,$coordinate);
536: $Apache::functionplotresponse::previous{$key}=$value;
537: }
538: }
539:
540: sub get_answer_from_form_fields {
541: my ($id)=@_;
542: my $answer='';
543: my %coords=();
544: foreach my $field (keys(%env)) {
545: if ($field=~/^form\.HWVAL\_$id/) {
546: $field=~/^form\.(.*)$/;
547: $coords{$1}=$env{$field};
548: }
549: }
550: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
551: return ($answer,%coords);
552: }
553:
1.15 www 554: #
555: # The following functions calculate the cubic-hermite splines server-side
556: #
557:
558: sub cubic_hermite {
559: my ($t,$p1,$s1,$p2,$s2)=@_;
560: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 5.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
561: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 5.*($t*$t*$t-$t*$t) *($s2-$p2);
562: }
563:
564: #
565: # d/dt(...)
566: #
567:
568: sub ddt_cubic_hermite {
569: my ($t,$p1,$s1,$p2,$s2)=@_;
570: return (6.*$t*$t-6.*$t) *$p1 + 5.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
571: (-6.*$t*$t+6.*$t)*$p2 + 5.*(3.*$t*$t-2.*$t) *($s2-$p2);
572: }
573:
574: #
575: # d^2/dt^2(...)
576: #
577:
578: sub d2dt2_cubic_hermite {
579: my ($t,$p1,$s1,$p2,$s2)=@_;
580: return (12.*$t-6.) *$p1 + 5.*(6.*$t-4.)*($s1-$p1)+
581: (-12.*$t+6.)*$p2 + 5.*(6.*$t-2.)*($s2-$p2);
582: }
583:
584: #
1.18 www 585: # Array index calculation
586: #
587: sub array_index {
588: my ($xmin,$xmax,$x)=@_;
1.26 www 589: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
1.20 www 590: }
591:
592: #
1.18 www 593: # Populate the arrays
594: #
595:
596: sub populate_arrays {
597: my ($id,$xmin,$xmax)=@_;
1.26 www 598: for (my $i=0; $i<=400; $i++) {
1.19 www 599: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 600: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 601: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 602: }
1.19 www 603: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 604: # Run over all splines in response
605: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 606: my $xiold=-1;
1.18 www 607: # Run over all points in spline
1.19 www 608: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 609: my $ni=$i+1;
610: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
611: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
612: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
613: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
614: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
615: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
616: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
617: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
618: # Run in small steps over spline parameter
1.26 www 619: for (my $t=0; $t<=1; $t+=0.0001) {
1.18 www 620: my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms));
1.19 www 621: if ($xi<$xiold) { return 'no_func'; }
1.26 www 622: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.19 www 623: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
1.18 www 624: $xiold=$xi;
1.22 www 625: # Function value
1.30 www 626: my $funcval=&cubic_hermite($t,@yparms);
627: $Apache::functionplotresponse::func[$xi]=$funcval;
628: if (defined($funcval)) {
629: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
630: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
631: }
632: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
633: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
634: }
635: }
1.28 www 636: # Chain rule
1.22 www 637: # dy/dx=dy/dt/(dx/dt)
638: my $dxdt=&ddt_cubic_hermite($t,@xparms);
639: if ($dxdt) {
640: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
641: }
1.28 www 642: # Faa di Bruno
643: # d^2y/dx^2=(d^2y/dt^2)/(dx/dt)^2+(dy/dt)/(d^2x/dt^2)
1.22 www 644: my $d2xdt2=&d2dt2_cubic_hermite($t,@xparms);
1.28 www 645: if (($dxdt) && ($d2xdt2)) {
646: $Apache::functionplotresponse::d2funcdx2[$xi]=
647: &d2dt2_cubic_hermite($t,@yparms)/($dxdt*$dxdt)
648: +&ddt_cubic_hermite($t,@yparms)/$d2xdt2;
1.22 www 649: }
1.18 www 650: }
651: }
652: }
653: }
654: }
655:
656: #
1.15 www 657: # Implentation of <functionplotresponse>
658: #
659:
1.1 www 660: sub start_functionplotresponse {
661: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
662: my $result='';
1.6 www 663: # To remember the splines - somehow, they need to come last
664: undef %Apache::functionplotresponse::splineorder;
665: undef %Apache::functionplotresponse::splineinitx;
666: undef %Apache::functionplotresponse::splineinity;
667: undef %Apache::functionplotresponse::splinescalex;
668: undef %Apache::functionplotresponse::splinescaley;
1.10 www 669: # Remember input fields, etc
670: undef %Apache::functionplotresponse::previous;
1.9 www 671: $Apache::functionplotresponse::inputfields='';
1.6 www 672: $Apache::functionplotresponse::counter=0;
1.24 www 673: # Remember rules
1.25 www 674: undef @Apache::functionplotresponse::functionplotrules;
1.10 www 675: # Part and ID
676: my $partid=$Apache::inputtags::part;
677: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 678: # Internal ID to mark the applet and its coordinates
1.10 www 679: my $internalid = $partid.'_'.$id;
680: # Previous answer
681: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
682:
1.6 www 683: # Parameters of <functionplotresponse>
1.3 www 684: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval);
1.18 www 685: $xmin=(defined($xmin)?$xmin:-10);
1.3 www 686: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval);
1.18 www 687: $xmax=(defined($xmax)?$xmax:10);
1.3 www 688: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval);
1.18 www 689: $ymin=(defined($ymin)?$ymin:-10);
1.3 www 690: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval);
1.18 www 691: $ymax=(defined($ymax)?$ymax:10);
1.25 www 692: if ($xmax<=$xmin) {
693: &Apache::lonxml::warning('Maximum x-value needs to be larger than minimum value.');
694: $xmax=$xmin+20;
695: }
696: if ($ymax<=$ymin) {
697: &Apache::lonxml::warning('Maximum y-value needs to be larger than minimum value.');
698: $ymax=$ymin+20;
699: }
1.6 www 700: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
701: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
702: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 703: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
704: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 705: if ($target eq 'edit') {
706: $result.=&Apache::edit::start_table($token)
707: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
708: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
709: .&Apache::edit::deletelist($target,$token)
710: .'</span></td>'
711: ."<td> "
712: .&Apache::edit::end_row()
713: .&Apache::edit::start_spanning_row()
714: ."\n";
1.14 www 715: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
716: $token,'6').' '.
717: &Apache::edit::text_arg('Minimum x-value:','xmin',
718: $token,'4').' '.
1.12 www 719: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 720: $token,'4').' '.
1.12 www 721: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 ! www 722: ['yes','no'],$token).'<br />'.
1.14 www 723: &Apache::edit::text_arg('Label y-axis:','ylabel',
724: $token,'6').' '.
1.12 www 725: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 726: $token,'4').' '.
1.12 www 727: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 728: $token,'4').' '.
1.12 www 729: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 ! www 730: ['yes','no'],$token).'<br />'.
1.12 www 731: &Apache::edit::select_arg('Grid visible:','gridvisible',
732: ['yes','no'],$token).
733: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
734: } elsif ($target eq 'modified') {
735: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 736: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.12 www 737: 'xaxisvisible','yaxisvisible','gridvisible');
738: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 739:
1.12 www 740: } elsif ($target eq 'meta') {
1.10 www 741: $result=&Apache::response::meta_package_write('functionplotresponse');
1.12 www 742: } elsif ($target eq 'web') {
1.5 www 743: # paste in the update routine to receive stuff back from the applet
744: $result.=&update_script($internalid);
745: # start the initscript for this applet
1.3 www 746: $result.=&start_init_script($internalid);
1.5 www 747: # put the axis commands inside
1.4 www 748: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.14 www 749: $result.=&axes_label($internalid,$xlabel,$ylabel);
1.5 www 750: # init script is left open
1.1 www 751: }
752: return $result;
753: }
754:
1.25 www 755: sub compare_rel {
1.26 www 756: my ($relationship,$value,$realval,$tol)=@_;
757: # is the real value defined?
758: unless (defined($realval)) {
759: if ($relationship eq 'eq') {
760: if ($value eq 'undef') {
761: return 1;
762: } else {
763: return 0;
764: }
765: } elsif ($relationship eq 'ne') {
766: if ($value eq 'undef') {
767: return 0;
768: } else {
769: return 1;
770: }
771: } else {
772: return 0;
773: }
774: }
775:
776: # it is defined.
777: if ($relationship eq 'gt') {
778: return ($realval>$value);
779: } elsif ($relationship eq 'ge') {
780: return ($realval>$value-$tol);
781: } elsif ($relationship eq 'lt') {
782: return ($realval<$value);
783: } elsif ($relationship eq 'le') {
784: return ($realval<$value+$tol);
785: } elsif ($relationship eq 'ne') {
786: return (abs($value-$realval)>$tol);
787: } else {
788: return (abs($value-$realval)<$tol);
789: }
1.25 www 790: return 0;
791: }
792:
793: sub functionplotrulecheck {
794: my ($rule,$xmin,$xmax,$tolfunc,$toldfdx,$told2fdx2)=@_;
1.32 ! www 795: # &Apache::lonnet::logthis("Rule $rule TolFunc $tolfunc TolDfDx $toldfdx TolD2fDx2 $told2fdx2");
1.25 www 796: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$relationship,$value)
797: =split(/\:/,$rule);
1.30 www 798:
799: my $li=0;
800: my $lh=400;
801:
1.31 www 802: # Special case: the upper boundary was not defined
803: # and needs to be set to the value where
804: # the condition is not true anymore => set flag
805:
806: my $findupper=0;
807: if (($xfinal eq '')
808: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
809: && ($xfinallabel)) {
810: $findupper=1;
811: }
812:
1.25 www 813: # if a hard value is set for the boundaries, it overrides the label
1.30 www 814: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
815: $li=&array_index($xmin,$xmax,$xinitial);
816: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
817: }
818: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
819: $lh=&array_index($xmin,$xmax,$xfinal);
820: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 821: }
1.31 www 822: # if the label is defined, use it
1.25 www 823: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.30 www 824: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
825: } else {
826: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 827: }
1.31 www 828: unless ($findupper) {
829: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
830: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel};
831: } else {
832: $lh=&array_index($xmin,$xmax,$xfinal);
833: }
1.25 www 834: }
835: # Basic sanity checks
1.30 www 836: if ($li<0) { $li=0; }
837: if ($lh>400) { $lh=400; }
838: if ($li>$lh) {
839: $lh=$li;
1.25 www 840: }
1.31 www 841:
1.32 ! www 842: # &Apache::lonnet::logthis("Init $xinitial=$li Final $xfinal=$lh Findupper: $findupper");
1.27 www 843: my $tol=$tolfunc;
844: if ($derivative==2) {
845: $tol=$told2fdx2;
846: } elsif ($derivative==1) {
847: $tol=$toldfdx;
848: }
849: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 850: my $val;
851: if ($derivative==2) {
1.27 www 852: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 853: } elsif ($derivative==1) {
1.27 www 854: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.25 www 855: } else {
1.27 www 856: $val=$Apache::functionplotresponse::func[$i];
1.25 www 857: }
1.31 www 858: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.32 ! www 859: # &Apache::lonnet::logthis("Condition false $findupper at $i with $val");
1.31 www 860: if (($findupper) && ($i>$li)) {
861: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.32 ! www 862: # &Apache::lonnet::logthis("Setting $xfinallabel to $i");
1.31 www 863: return 1;
864: } else {
865: return 0;
866: }
867: }
1.25 www 868: }
1.27 www 869: return 1;
1.24 www 870: }
871:
1.1 www 872: sub end_functionplotresponse {
873: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
874: &Apache::response::end_response;
1.3 www 875:
1.1 www 876: my $result;
1.10 www 877: my $id=$Apache::inputtags::response[-1];
878: my $partid=$Apache::inputtags::part;
879: my $internalid = $partid.'_'.$id;
1.3 www 880:
1.12 www 881: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1.10 www 882: if ($target eq 'grade'
883: && &Apache::response::submitted()
884: && $Apache::lonhomework::type eq 'exam') {
885:
1.27 www 886: &Apache::response::scored_response($partid,$id);
1.10 www 887:
888: } elsif ($target eq 'grade'
889: && &Apache::response::submitted()
890: && $Apache::lonhomework::type ne 'exam') {
891: my ($response,%coords)=&get_answer_from_form_fields($internalid);
892: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1.12 www 893: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
894: #
895: # Actually grade
896: #
1.18 www 897: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval);
898: $xmin=(defined($xmin)?$xmin:-10);
899: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval);
900: $xmax=(defined($xmax)?$xmax:10);
1.25 www 901: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval);
902: $ymin=(defined($ymin)?$ymin:-10);
903: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval);
904: $ymax=(defined($ymax)?$ymax:10);
1.27 www 905:
906: my $percent=&Apache::lonxml::get_param('percenterror',$parstack,$safeeval);
907: $percent=(defined($percent)?$percent:5);
908:
909: my $tolfunc=$percent*($ymax-$ymin)/100.;
1.25 www 910: my $toldfdx=1;
911: my $told2fdx2=1;
912: if ($xmax>$xmin) {
913: $toldfdx=$tolfunc/($xmax-$xmin);
914: $told2fdx2=$toldfdx/($xmax-$xmin);
915: }
916:
1.24 www 917: my $ad='';
1.30 www 918: undef %Apache::functionplotresponse::functionplotrulelabels;
919: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
920: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.18 www 921: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
1.21 www 922: $ad='NOT_FUNCTION';
1.18 www 923: } else {
1.24 www 924: # We have a function that we can actually grade, go through the spline rules.
1.25 www 925: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
926: unless (&functionplotrulecheck($rule,$xmin,$xmax,$tolfunc,$toldfdx,$told2fdx2)) {
1.24 www 927: $ad='INCORRECT';
928: last;
929: }
930: }
931: # If it's not wrong, it's correct
932: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 933: }
1.20 www 934:
1.12 www 935: #
936: # Store grading info
937: #
938: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
939: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 940: } elsif ($target eq 'web') {
1.6 www 941: # Now is the time to render all of the stored splines
942: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
943: $result.=&generate_spline($internalid,$label);
944: }
1.5 www 945: # close the init script
1.3 www 946: $result.=&end_init_script();
1.17 www 947: # register all splines in this response
948: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
949: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
950: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
951: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
952: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
953: }
1.9 www 954: # generate the input fields
955: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 956: # actually start the <applet>-tag
1.3 www 957: $result.=&geogebra_startcode($internalid);
1.5 www 958: # load the spline bytecode
1.3 www 959: $result.=&geogebra_spline_program();
1.5 www 960: # set default parameters
1.3 www 961: $result.=&geogebra_default_parameters($internalid);
1.5 www 962: # close the <applet>-tag
1.1 www 963: $result.=&geogebra_endcode();
964: }
965: return $result;
966: }
967:
968: 1;
969:
970: __END__
971:
972: =head1 NAME
973:
974: Apache::functionplotresponse.pm;
975:
976: =head1 SYNOPSIS
977:
978: Handles tags associated with accepting function plots.
979:
980: This is part of the LearningOnline Network with CAPA project
981: described at http://www.lon-capa.org.
982:
983: =head1 HANDLER SUBROUTINE
984:
985: start_functionplotresponse()
986:
987: =head1 OTHER SUBROUTINES
988:
989: =over
990:
991: =item end_functionplotresponse()
992:
993: =back
994:
995: =cut
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