Annotation of loncom/homework/functionplotresponse.pm, revision 1.33
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.33 ! www 4: # $Id: functionplotresponse.pm,v 1.32 2010/11/10 22:53:32 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: $relationship,
1.33 ! www 392: &Apache::lonxml::get_param('value',$parstack,$safeeval),
! 393: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 394: )));
395: } elsif ($target eq 'edit') {
1.29 www 396: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
397: &Apache::edit::text_arg('Index:','index',
398: $token,'4').' '.
399: &Apache::edit::select_arg(&mt('Function:'),'derivative',
400: [['0','Function itself'],
401: ['1','First derivative'],
1.32 www 402: ['2','Second derivative']],$token).'<br />'.
1.30 www 403:
1.29 www 404: &Apache::edit::text_arg('(Initial) x-value:','xinitial',
1.30 www 405: $token,'4').
406: &Apache::edit::select_or_text_arg('(Initial) x-value label:','xinitiallabel',
1.32 www 407: [['start','Start of Plot']],$token,'8').'<br />'.
1.30 www 408:
409: &Apache::edit::text_arg('Optional final x-value for ranges:','xfinal',
410: $token,'4').
411: &Apache::edit::select_or_text_arg('Optional final x-value label:','xfinallabel',
1.32 www 412: [['end','End of Plot']],$token,'8').'<br />'.
1.30 www 413:
1.29 www 414: &Apache::edit::select_arg(&mt('Relationship:'),'relationship',
415: [['eq','equal'],
416: ['ne','not equal'],
417: ['ge','greater than or equal'],
418: ['gt','greater than'],
419: ['lt','less than'],
420: ['le','less than or equal']],$token).
421: $result.= &Apache::edit::select_or_text_arg('Value:','value',
422: [['undef','not defined']],$token,'4').
423: &Apache::edit::text_arg('Percent error:','percenterror',
424: $token,'4').
425: &Apache::edit::end_row();
426: } elsif ($target eq 'modified') {
427: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.30 www 428: $safeeval,'index','derivative','xinitial','xinitiallabel','xfinal','xfinallabel','relationship',
1.29 www 429: 'value','percenterror');
430: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 431: }
1.12 www 432: return $result;
433: }
434:
1.25 www 435: sub end_functionplotrule {
1.13 www 436: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
437: my $result='';
438: if ($target eq 'edit') {
439: $result=&Apache::edit::end_table();
440: }
441: return $result;
1.12 www 442: }
443:
444:
445: #
1.23 www 446: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 447: #
448: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
449: #
450: sub start_spline {
451: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 452: my $result='';
453: if ($target eq 'web') {
1.23 www 454: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 455: $Apache::functionplotresponse::counter++;
456: if ($label=~/\W/) {
1.23 www 457: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 458: }
459: $label=~s/\W//gs;
1.23 www 460: unless ($label) {
461: $label='S'.$Apache::functionplotresponse::counter;
462: } else {
463: $label='S'.$label;
464: }
1.13 www 465: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 466: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 467: }
468:
469: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
470: if ($order<2) { $order=2; }
471: if ($order>8) { $order=8; }
472: $Apache::functionplotresponse::splineorder{$label}=$order;
473:
474: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
475: unless ($x) { $x=0; }
476: $Apache::functionplotresponse::splineinitx{$label}=$x;
477:
478: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
479: unless ($y) { $y=0; }
480: $Apache::functionplotresponse::splineinity{$label}=$y;
481:
482: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
483: unless ($sx) { $sx=$order; }
484: $Apache::functionplotresponse::splinescalex{$label}=$sx;
485:
486: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
487: unless ($sy) { $sy=2; }
488: $Apache::functionplotresponse::splinescaley{$label}=$sy;
489: } elsif ($target eq 'edit') {
490: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 491: &Apache::edit::text_arg('Index:','index',
1.14 www 492: $token,'4').' '.
1.13 www 493: &Apache::edit::select_arg('Order:','order',
1.14 www 494: ['2','3','4','5','6','7','8','9'],$token).' '.
1.13 www 495: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 496: $token,'4').' '.
1.13 www 497: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 498: $token,'4').' '.
1.13 www 499: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 500: $token,'4').' '.
1.13 www 501: &Apache::edit::text_arg('Scale y:','scaley',
502: $token,'4').
503: &Apache::edit::end_row();
504: } elsif ($target eq 'modified') {
505: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 506: $safeeval,'index','order','initx','inity',
1.13 www 507: 'scalex','scaley');
508: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
509: }
510: return $result;
1.6 www 511: }
512:
513: sub end_spline {
1.13 www 514: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
515: my $result='';
516: if ($target eq 'edit') {
517: $result=&Apache::edit::end_table();
518: }
519: return $result;
1.4 www 520: }
521:
1.3 www 522: sub end_init_script {
523: return (<<ENDENDINIT);
524: }
525: // ]]>
526: </script>
527: ENDENDINIT
528: }
529:
1.10 www 530: #
531: # Storing and restoring spline coordinates from part answers
532: #
533: sub decode_previous_answer {
534: my ($answer)=@_;
535: foreach my $coordinate (split(/\,/,$answer)) {
536: my ($key,$value)=split(/\=/,$coordinate);
537: $Apache::functionplotresponse::previous{$key}=$value;
538: }
539: }
540:
541: sub get_answer_from_form_fields {
542: my ($id)=@_;
543: my $answer='';
544: my %coords=();
545: foreach my $field (keys(%env)) {
546: if ($field=~/^form\.HWVAL\_$id/) {
547: $field=~/^form\.(.*)$/;
548: $coords{$1}=$env{$field};
549: }
550: }
551: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
552: return ($answer,%coords);
553: }
554:
1.15 www 555: #
556: # The following functions calculate the cubic-hermite splines server-side
557: #
558:
559: sub cubic_hermite {
560: my ($t,$p1,$s1,$p2,$s2)=@_;
561: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 5.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
562: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 5.*($t*$t*$t-$t*$t) *($s2-$p2);
563: }
564:
565: #
566: # d/dt(...)
567: #
568:
569: sub ddt_cubic_hermite {
570: my ($t,$p1,$s1,$p2,$s2)=@_;
571: return (6.*$t*$t-6.*$t) *$p1 + 5.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
572: (-6.*$t*$t+6.*$t)*$p2 + 5.*(3.*$t*$t-2.*$t) *($s2-$p2);
573: }
574:
575: #
576: # d^2/dt^2(...)
577: #
578:
579: sub d2dt2_cubic_hermite {
580: my ($t,$p1,$s1,$p2,$s2)=@_;
581: return (12.*$t-6.) *$p1 + 5.*(6.*$t-4.)*($s1-$p1)+
582: (-12.*$t+6.)*$p2 + 5.*(6.*$t-2.)*($s2-$p2);
583: }
584:
585: #
1.18 www 586: # Array index calculation
587: #
588: sub array_index {
589: my ($xmin,$xmax,$x)=@_;
1.26 www 590: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
1.20 www 591: }
592:
593: #
1.18 www 594: # Populate the arrays
595: #
596:
597: sub populate_arrays {
598: my ($id,$xmin,$xmax)=@_;
1.26 www 599: for (my $i=0; $i<=400; $i++) {
1.19 www 600: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 601: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 602: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 603: }
1.19 www 604: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 605: # Run over all splines in response
606: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 607: my $xiold=-1;
1.18 www 608: # Run over all points in spline
1.19 www 609: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 610: my $ni=$i+1;
611: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
612: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
613: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
614: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
615: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
616: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
617: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
618: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
619: # Run in small steps over spline parameter
1.26 www 620: for (my $t=0; $t<=1; $t+=0.0001) {
1.18 www 621: my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms));
1.19 www 622: if ($xi<$xiold) { return 'no_func'; }
1.26 www 623: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.19 www 624: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
1.18 www 625: $xiold=$xi;
1.22 www 626: # Function value
1.30 www 627: my $funcval=&cubic_hermite($t,@yparms);
628: $Apache::functionplotresponse::func[$xi]=$funcval;
629: if (defined($funcval)) {
630: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
631: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
632: }
633: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
634: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
635: }
636: }
1.28 www 637: # Chain rule
1.22 www 638: # dy/dx=dy/dt/(dx/dt)
639: my $dxdt=&ddt_cubic_hermite($t,@xparms);
640: if ($dxdt) {
641: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
642: }
1.28 www 643: # Faa di Bruno
644: # d^2y/dx^2=(d^2y/dt^2)/(dx/dt)^2+(dy/dt)/(d^2x/dt^2)
1.22 www 645: my $d2xdt2=&d2dt2_cubic_hermite($t,@xparms);
1.28 www 646: if (($dxdt) && ($d2xdt2)) {
647: $Apache::functionplotresponse::d2funcdx2[$xi]=
648: &d2dt2_cubic_hermite($t,@yparms)/($dxdt*$dxdt)
649: +&ddt_cubic_hermite($t,@yparms)/$d2xdt2;
1.22 www 650: }
1.18 www 651: }
652: }
653: }
654: }
655: }
656:
657: #
1.15 www 658: # Implentation of <functionplotresponse>
659: #
660:
1.1 www 661: sub start_functionplotresponse {
662: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
663: my $result='';
1.6 www 664: # To remember the splines - somehow, they need to come last
665: undef %Apache::functionplotresponse::splineorder;
666: undef %Apache::functionplotresponse::splineinitx;
667: undef %Apache::functionplotresponse::splineinity;
668: undef %Apache::functionplotresponse::splinescalex;
669: undef %Apache::functionplotresponse::splinescaley;
1.10 www 670: # Remember input fields, etc
671: undef %Apache::functionplotresponse::previous;
1.9 www 672: $Apache::functionplotresponse::inputfields='';
1.6 www 673: $Apache::functionplotresponse::counter=0;
1.24 www 674: # Remember rules
1.25 www 675: undef @Apache::functionplotresponse::functionplotrules;
1.10 www 676: # Part and ID
677: my $partid=$Apache::inputtags::part;
678: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 679: # Internal ID to mark the applet and its coordinates
1.10 www 680: my $internalid = $partid.'_'.$id;
681: # Previous answer
682: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
683:
1.6 www 684: # Parameters of <functionplotresponse>
1.3 www 685: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval);
1.18 www 686: $xmin=(defined($xmin)?$xmin:-10);
1.3 www 687: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval);
1.18 www 688: $xmax=(defined($xmax)?$xmax:10);
1.3 www 689: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval);
1.18 www 690: $ymin=(defined($ymin)?$ymin:-10);
1.3 www 691: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval);
1.18 www 692: $ymax=(defined($ymax)?$ymax:10);
1.25 www 693: if ($xmax<=$xmin) {
694: &Apache::lonxml::warning('Maximum x-value needs to be larger than minimum value.');
695: $xmax=$xmin+20;
696: }
697: if ($ymax<=$ymin) {
698: &Apache::lonxml::warning('Maximum y-value needs to be larger than minimum value.');
699: $ymax=$ymin+20;
700: }
1.6 www 701: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
702: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
703: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 704: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
705: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 706: if ($target eq 'edit') {
707: $result.=&Apache::edit::start_table($token)
708: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
709: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
710: .&Apache::edit::deletelist($target,$token)
711: .'</span></td>'
712: ."<td> "
713: .&Apache::edit::end_row()
714: .&Apache::edit::start_spanning_row()
715: ."\n";
1.14 www 716: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
717: $token,'6').' '.
718: &Apache::edit::text_arg('Minimum x-value:','xmin',
719: $token,'4').' '.
1.12 www 720: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 721: $token,'4').' '.
1.12 www 722: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 723: ['yes','no'],$token).'<br />'.
1.14 www 724: &Apache::edit::text_arg('Label y-axis:','ylabel',
725: $token,'6').' '.
1.12 www 726: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 727: $token,'4').' '.
1.12 www 728: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 729: $token,'4').' '.
1.12 www 730: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 731: ['yes','no'],$token).'<br />'.
1.12 www 732: &Apache::edit::select_arg('Grid visible:','gridvisible',
733: ['yes','no'],$token).
734: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
735: } elsif ($target eq 'modified') {
736: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 737: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.12 www 738: 'xaxisvisible','yaxisvisible','gridvisible');
739: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 740:
1.12 www 741: } elsif ($target eq 'meta') {
1.10 www 742: $result=&Apache::response::meta_package_write('functionplotresponse');
1.12 www 743: } elsif ($target eq 'web') {
1.5 www 744: # paste in the update routine to receive stuff back from the applet
745: $result.=&update_script($internalid);
746: # start the initscript for this applet
1.3 www 747: $result.=&start_init_script($internalid);
1.5 www 748: # put the axis commands inside
1.4 www 749: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.14 www 750: $result.=&axes_label($internalid,$xlabel,$ylabel);
1.5 www 751: # init script is left open
1.1 www 752: }
753: return $result;
754: }
755:
1.25 www 756: sub compare_rel {
1.26 www 757: my ($relationship,$value,$realval,$tol)=@_;
758: # is the real value defined?
759: unless (defined($realval)) {
760: if ($relationship eq 'eq') {
761: if ($value eq 'undef') {
762: return 1;
763: } else {
764: return 0;
765: }
766: } elsif ($relationship eq 'ne') {
767: if ($value eq 'undef') {
768: return 0;
769: } else {
770: return 1;
771: }
772: } else {
773: return 0;
774: }
775: }
776:
777: # it is defined.
778: if ($relationship eq 'gt') {
779: return ($realval>$value);
780: } elsif ($relationship eq 'ge') {
781: return ($realval>$value-$tol);
782: } elsif ($relationship eq 'lt') {
783: return ($realval<$value);
784: } elsif ($relationship eq 'le') {
785: return ($realval<$value+$tol);
786: } elsif ($relationship eq 'ne') {
787: return (abs($value-$realval)>$tol);
788: } else {
789: return (abs($value-$realval)<$tol);
790: }
1.25 www 791: return 0;
792: }
793:
794: sub functionplotrulecheck {
1.33 ! www 795: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
! 796:
! 797: # &Apache::lonnet::logthis("Rule $rule $xmin $xmax $ymin $ymax");
! 798:
! 799: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$relationship,$value,$percent)
1.25 www 800: =split(/\:/,$rule);
1.33 ! www 801: $percent=($percent>0?$percent:5);
1.30 www 802:
803: my $li=0;
804: my $lh=400;
805:
1.31 www 806: # Special case: the upper boundary was not defined
807: # and needs to be set to the value where
808: # the condition is not true anymore => set flag
809:
810: my $findupper=0;
811: if (($xfinal eq '')
812: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
813: && ($xfinallabel)) {
814: $findupper=1;
815: }
816:
1.25 www 817: # if a hard value is set for the boundaries, it overrides the label
1.30 www 818: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
819: $li=&array_index($xmin,$xmax,$xinitial);
820: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
821: }
822: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
823: $lh=&array_index($xmin,$xmax,$xfinal);
824: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 825: }
1.31 www 826: # if the label is defined, use it
1.25 www 827: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.30 www 828: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
829: } else {
830: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 831: }
1.31 www 832: unless ($findupper) {
833: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.33 ! www 834: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 835: } else {
836: $lh=&array_index($xmin,$xmax,$xfinal);
837: }
1.25 www 838: }
839: # Basic sanity checks
1.30 www 840: if ($li<0) { $li=0; }
841: if ($lh>400) { $lh=400; }
842: if ($li>$lh) {
843: $lh=$li;
1.25 www 844: }
1.31 www 845:
1.32 www 846: # &Apache::lonnet::logthis("Init $xinitial=$li Final $xfinal=$lh Findupper: $findupper");
1.33 ! www 847: my $tol=$percent*($ymax-$ymin)/100;
! 848: if ($xmax>$xmin) {
! 849: if ($derivative==2) {
! 850: $tol=4.*$tol/($xmax-$xmin);
! 851: } elsif ($derivative==1) {
! 852: $tol=2.*$tol/($xmax-$xmin);
! 853: }
1.27 www 854: }
855: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 856: my $val;
857: if ($derivative==2) {
1.27 www 858: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 859: } elsif ($derivative==1) {
1.27 www 860: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.25 www 861: } else {
1.27 www 862: $val=$Apache::functionplotresponse::func[$i];
1.25 www 863: }
1.31 www 864: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.33 ! www 865: # &Apache::lonnet::logthis("Condition false $findupper at $i with $val tol:$tol from $value");
1.31 www 866: if (($findupper) && ($i>$li)) {
867: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.32 www 868: # &Apache::lonnet::logthis("Setting $xfinallabel to $i");
1.31 www 869: return 1;
870: } else {
871: return 0;
872: }
873: }
1.25 www 874: }
1.27 www 875: return 1;
1.24 www 876: }
877:
1.1 www 878: sub end_functionplotresponse {
879: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
880: &Apache::response::end_response;
1.3 www 881:
1.1 www 882: my $result;
1.10 www 883: my $id=$Apache::inputtags::response[-1];
884: my $partid=$Apache::inputtags::part;
885: my $internalid = $partid.'_'.$id;
1.3 www 886:
1.12 www 887: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1.10 www 888: if ($target eq 'grade'
889: && &Apache::response::submitted()
890: && $Apache::lonhomework::type eq 'exam') {
891:
1.27 www 892: &Apache::response::scored_response($partid,$id);
1.10 www 893:
894: } elsif ($target eq 'grade'
895: && &Apache::response::submitted()
896: && $Apache::lonhomework::type ne 'exam') {
897: my ($response,%coords)=&get_answer_from_form_fields($internalid);
898: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1.12 www 899: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
900: #
901: # Actually grade
902: #
1.18 www 903: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval);
904: $xmin=(defined($xmin)?$xmin:-10);
905: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval);
906: $xmax=(defined($xmax)?$xmax:10);
1.25 www 907: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval);
908: $ymin=(defined($ymin)?$ymin:-10);
909: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval);
910: $ymax=(defined($ymax)?$ymax:10);
1.27 www 911:
1.24 www 912: my $ad='';
1.30 www 913: undef %Apache::functionplotresponse::functionplotrulelabels;
914: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
915: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.18 www 916: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
1.21 www 917: $ad='NOT_FUNCTION';
1.18 www 918: } else {
1.24 www 919: # We have a function that we can actually grade, go through the spline rules.
1.25 www 920: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.33 ! www 921: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
1.24 www 922: $ad='INCORRECT';
923: last;
924: }
925: }
926: # If it's not wrong, it's correct
927: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 928: }
1.20 www 929:
1.12 www 930: #
931: # Store grading info
932: #
933: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
934: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 935: } elsif ($target eq 'web') {
1.6 www 936: # Now is the time to render all of the stored splines
937: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
938: $result.=&generate_spline($internalid,$label);
939: }
1.5 www 940: # close the init script
1.3 www 941: $result.=&end_init_script();
1.17 www 942: # register all splines in this response
943: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
944: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
945: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
946: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
947: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
948: }
1.9 www 949: # generate the input fields
950: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 951: # actually start the <applet>-tag
1.3 www 952: $result.=&geogebra_startcode($internalid);
1.5 www 953: # load the spline bytecode
1.3 www 954: $result.=&geogebra_spline_program();
1.5 www 955: # set default parameters
1.3 www 956: $result.=&geogebra_default_parameters($internalid);
1.5 www 957: # close the <applet>-tag
1.1 www 958: $result.=&geogebra_endcode();
959: }
960: return $result;
961: }
962:
963: 1;
964:
965: __END__
966:
967: =head1 NAME
968:
969: Apache::functionplotresponse.pm;
970:
971: =head1 SYNOPSIS
972:
973: Handles tags associated with accepting function plots.
974:
975: This is part of the LearningOnline Network with CAPA project
976: described at http://www.lon-capa.org.
977:
978: =head1 HANDLER SUBROUTINE
979:
980: start_functionplotresponse()
981:
982: =head1 OTHER SUBROUTINES
983:
984: =over
985:
986: =item end_functionplotresponse()
987:
988: =back
989:
990: =cut
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