Annotation of loncom/homework/functionplotresponse.pm, revision 1.44
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.44 ! www 4: # $Id: functionplotresponse.pm,v 1.43 2010/11/20 21:35:53 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;
1.36 www 34:
1.1 www 35: BEGIN {
1.37 www 36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
37: 'functionplotrule','functionplotruleset',
38: 'functionplotelements'));
1.1 www 39: }
40:
1.5 www 41: #
42: # There can be a number of applets on a page, each called ggbApplet_$id,
43: # where $id is the "_"-concatenated part and responseid
44: #
45:
1.1 www 46: sub geogebra_startcode {
1.3 www 47: my ($id)=@_;
1.1 www 48: return (<<ENDSTARTCODE);
1.3 www 49: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 50: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
52: ENDSTARTCODE
53: }
54:
55: sub geogebra_endcode {
1.2 www 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
57: }
58:
1.5 www 59: #
60: # This is the internal GeoGebra bytecode which defines the spline functions
61: #
1.2 www 62: sub geogebra_spline_program {
63: return (<<ENDSPLINEPROGRAM);
1.42 www 64: <param name="ggbBase64" value="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" />
1.2 www 65: ENDSPLINEPROGRAM
66: }
67:
1.5 www 68: #
69: # The standard set of parameters inside <applet>
70: #
1.2 www 71: sub geogebra_default_parameters {
1.3 www 72: my ($id)=@_;
1.2 www 73: return(<<ENDDEFAULTPARAMETERS);
74: <param name="image" value="/adm/lonIcons/lonanim.gif" />
75: <param name="boxborder" value="false" />
76: <param name="centerimage" value="true" />
1.39 www 77: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_algos.jar, geogebra_export.jar, geogebra_javascript.jar, jlatexmath.jar, jlm_greek.jar, jlm_cyrillic.jar, geogebra_properties.jar" />
78: <param name="cache_version" value="3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0" />
1.2 www 79: <param name="framePossible" value="false" />
80:
81: <param name="showResetIcon" value="false" />
82: <param name="showAnimationButton" value="false" />
83: <param name="enableRightClick" value="false" />
84: <param name="errorDialogsActive" value="true" />
85: <param name="enableLabelDrags" value="false" />
86: <param name="showMenuBar" value="false" />
87: <param name="showToolBar" value="false" />
88: <param name="showToolBarHelp" value="false" />
89: <param name="showAlgebraInput" value="false" />
90: <param name="enableShiftDragZoom" value="false" />
91: <param name="allowRescaling" value="false" />
92: <param name="enableLabelDrags" value="false" />
1.3 www 93: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 94: ENDDEFAULTPARAMETERS
1.1 www 95: }
96:
1.5 www 97: #
98: # This subroutine is called by LON-CAPA at </problem>
99: # Each applet on the page will call function ggbOnInit when it is done loading
100: # This function in turn will call the respective function registered by start_init_script
101: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
102: #
103:
1.3 www 104: sub init_script {
1.16 www 105: if ($#Apache::functionplotresponse::callscripts>=0) {
106: my $script='';
107: foreach my $id (@Apache::functionplotresponse::callscripts) {
108: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
109: }
110: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.17 www 111: ") { setTimeout('ggbInitAll()',20) }";
1.16 www 112: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 113: return (<<ENDGGBINIT);
114: <script type="text/javascript">
115: // <![CDATA[
1.16 www 116: // Function that each applet will call when loaded
117: // It will pass "its" parameter
118: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 119: function ggbOnInit(param) {
1.16 www 120: $script
121: }
122: function ggbInitAll() {
1.17 www 123: $calls
1.3 www 124: }
125: // ]]>
126: </script>
127: ENDGGBINIT
128: }
129: }
130:
1.5 www 131: #
132: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 133: # Changes the hidden fields on the web page
1.5 www 134: #
135: sub update_script {
136: my ($id)=@_;
137: return (<<ENDUPDATESCRIPT);
138: <script type="text/javascript">
139: // <![CDATA[
140: function updatePointCoordinates_$id(coordinateName) {
141: var x = document.ggbApplet_$id.getXcoord(coordinateName);
142: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 145: }
146: // ]]>
147: </script>
148: ENDUPDATESCRIPT
149: }
150:
151: #
152: # Register the above update-handler for a variable
153: #
154:
155: sub update_register {
156: my ($id,$variable)=@_;
1.6 www 157: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
158: }
159:
160: #
1.40 www 161: # Set a point coordinate variable
1.6 www 162: #
1.40 www 163: sub set_point_coordinate {
1.6 www 164: my ($id,$variable,$x,$y)=@_;
165: return (<<ENDSETVARIABLE);
1.9 www 166: document.ggbApplet_$id.evalCommand("$variable=($x,$y)");
1.40 www 167: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 168: ENDSETVARIABLE
169: }
170:
171: #
1.40 www 172: # Set a slope coordinate variable
173: #
174: sub set_slope_coordinate {
175: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname)=@_;
176: my $xvariable=$variable.'x';
177: my $yvariable=$variable.'y';
178: my $domain=$xmax-$xmin;
179: my $range=$ymax-$ymin;
180: my $xinterval=$domain/100.;
181: my $yinterval=$range/200.;
182: return (<<ENDSETSVARIABLE);
183: document.ggbApplet_$id.evalCommand("$xvariable=Slider[0,$domain,$xinterval]");
184: document.ggbApplet_$id.setVisible("$xvariable", false);
185: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
186: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
187: document.ggbApplet_$id.setVisible("$yvariable", false);
188: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
189: document.ggbApplet_$id.evalCommand("$variable=($xvariable+x($pointname),$yvariable+y($pointname))");
190: document.ggbApplet_$id.setLabelVisible("$variable", false);
191: ENDSETSVARIABLE
192: }
193:
194: #
1.9 www 195: # Input field name for a coordinate variable
196: #
197:
198: sub field_name {
199: my ($id,$variable,$name)=@_;
200: return "HWVAL_$id\_$variable\_$name";
201: }
202:
203: #
204: # Generate an input field for a coordinate variable
205: #
206:
207: sub generate_input_field {
208: my ($id,$variable,$x,$y)=@_;
209: $Apache::functionplotresponse::inputfields.=
210: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
211: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
212: }
213:
214: #
1.40 www 215: # Initialize a new point coordinate variable at set a listener on it
1.6 www 216: #
1.40 www 217: sub new_point_coordinate {
1.6 www 218: my ($id,$variable,$x,$y)=@_;
1.11 www 219: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 220: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
221: }
1.11 www 222: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 223: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
224: }
1.9 www 225: &generate_input_field($id,$variable,$x,$y);
1.40 www 226: return &set_point_coordinate($id,$variable,$x,$y).&update_register($id,$variable);
227: }
228:
229: #
230: # Initialize a new slope coordinate variable at set a listener on it
231: #
232: sub new_slope_coordinate {
233: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax)=@_;
234: #
235: # $variable: name of the slope point
236: # $x, $y: coordinates of the slope point
237: # $pointname: name of the associated point point
238: # $xp $yp: coordinates of the point point
239: #
240: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
241: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
242: }
243: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
244: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
245: }
246: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
247: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
248: }
249: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
250: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
251: }
252:
253: &generate_input_field($id,$variable,$x,$y);
254: my $xrel=$x-$xp;
255: my $yrel=$y-$yp;
256: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname).&update_register($id,$variable);
1.5 www 257: }
258:
259: #
260: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
261: # It then starts the right headers
262: #
1.3 www 263: sub start_init_script {
264: my ($id)=@_;
1.16 www 265: # Add id to the list of ggbInit_$id functions that need to be called
266: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 267: # ... and open this function
1.3 www 268: return (<<ENDSTARTINIT);
269: <script type="text/javascript">
270: // <![CDATA[
1.5 www 271: // variable that will eventually be passed back to the server
272: var coordinateMap_$id = [];
1.16 www 273: // flag for not loaded yet
274: var loaded_$id=false;
1.5 www 275: // Init-function for applet
1.3 www 276: function ggbInit_$id() {
277: ENDSTARTINIT
278: }
279:
1.5 www 280: #
281: # This sets the axes inside ggbInit_$id
282: #
283:
1.4 www 284: sub axes_script {
285: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
286: return (<<ENDAXESSCRIPT);
287: // changes (xmin, xmax, ymin, ymax)
288: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
289:
290: // makes the (x,y) axis (in)visible
291: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
292: // makes the grid (in)visible
293: document.ggbApplet_$id.setGridVisible($gvisible);
294: ENDAXESSCRIPT
295: }
296:
1.14 www 297: sub axes_label {
298: my ($id,$xlabel,$ylabel)=@_;
299: unless ($xlabel || $ylabel) { return ''; }
300: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
301: if ($xlabel) {
302: $return.=(<<ENDXAXISLABELSCRIPT);
303: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
304: document.ggbApplet_$id.setVisible("Xlabel",false);
305: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
306: ENDXAXISLABELSCRIPT
307: }
308: if ($ylabel) {
309: $return.=(<<ENDYAXISLABELSCRIPT);
310: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
311: document.ggbApplet_$id.setVisible("Ylabel",false);
312: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
313: ENDYAXISLABELSCRIPT
314: }
315: return $return;
316: }
317:
1.4 www 318: sub plot_script {
1.41 www 319: my ($id,$function,$fixed,$label,$xmin,$xmax)=@_;
320: $label=~s/\W//g;
321: if (($label) && ($label!~/^[A-Za-z]/)) {
322: $label='C'.$label;
323: }
324: my $visible=0;
325: if ($label) {
326: $visible="1";
327: } else {
328: $Apache::functionplotresponse::counter++;
329: $label='C'.$Apache::functionplotresponse::counter;
330: }
1.6 www 331: if ($fixed) {
1.43 www 332: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
333: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n");
1.6 www 334: } else {
335: return "document.ggbApplet_$id.evalCommand('y=$function')";
336: }
1.4 www 337: }
338:
1.5 www 339: #
1.7 www 340: # Subroutine that generates code for spline $label based on stored information
1.6 www 341: #
342:
343: sub generate_spline {
1.40 www 344: my ($id,$label,$xmin,$xmax,$ymin,$ymax)=@_;
1.6 www 345: my $result='';
1.7 www 346: my $order=$Apache::functionplotresponse::splineorder{$label};
347: my $x=$Apache::functionplotresponse::splineinitx{$label};
348: my $y=$Apache::functionplotresponse::splineinity{$label};
349: my $sx=$Apache::functionplotresponse::splinescalex{$label};
350: my $sy=$Apache::functionplotresponse::splinescaley{$label};
351: my @coords=();
352: foreach my $i (1..$order) {
1.40 www 353: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y);
354: my $xp=$x;
1.8 www 355: $x+=$sx/(2.*($order-1));
1.7 www 356: push(@coords,$label.'P'.$i);
1.40 www 357: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax);
1.8 www 358: $x+=$sx/(2.*($order-1));
1.7 www 359: push(@coords,$label.'S'.$i);
360: }
361: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 362: return $result;
363: }
364: #
365: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 366: #
1.4 www 367: sub start_backgroundplot {
368: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
369: my $result='';
370: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
371: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.41 www 372: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.6 www 373: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
374:
1.4 www 375: unless ($function) { $function="0"; }
376: if ($target eq 'web') {
1.41 www 377: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
378: $result.=&plot_script($internalid,$function,$fixed,$label,$xmin,$xmax);
1.13 www 379: } elsif ($target eq 'edit') {
380: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
381: &Apache::edit::text_arg('Function:','function',
382: $token,'16').
1.41 www 383: &Apache::edit::text_arg('Label on Plot:','label',
384: $token,'8').
1.13 www 385: &Apache::edit::select_arg('Fixed location:','fixed',
386: ['yes','no'],$token).
387: &Apache::edit::end_row();
388: } elsif ($target eq 'modified') {
389: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.41 www 390: $safeeval,'function','label','fixed');
1.13 www 391: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
392: }
393: return $result;
1.4 www 394: }
395:
396: sub end_backgroundplot {
1.13 www 397: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
398: my $result='';
399: if ($target eq 'edit') {
400: $result=&Apache::edit::end_table();
401: }
402: return $result;
1.6 www 403: }
404:
405: #
1.25 www 406: # <functionplotrule ... />
1.12 www 407: #
1.25 www 408: sub start_functionplotrule {
1.12 www 409: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
410: my $result='';
1.24 www 411: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
412: $Apache::functionplotresponse::counter++;
413: if ($label=~/\W/) {
1.25 www 414: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 415: }
416: $label=~s/\W//gs;
417: unless ($label) {
418: $label='R'.$Apache::functionplotresponse::counter;
419: } else {
420: $label='R'.$label;
421: }
422: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 423: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 424: }
425:
426:
427: if ($target eq 'grade') {
428: # Simply remember - in order - for later
1.25 www 429: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
430: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 431: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 432: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 433: }
434: $beginninglabel=~s/\W//gs;
435: $endinglabel=~s/\W//gs;
436: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
437: $relationship=~s/\W//gs;
438: $relationship=lc($relationship);
439: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 440: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 441: $relationship='eq';
442: }
1.35 www 443: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 444: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 445: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 446: $derivative=0;
447: }
1.25 www 448: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 449: $label,
450: $derivative,
1.25 www 451: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 452: $beginninglabel,
1.25 www 453: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 454: $endinglabel,
1.35 www 455: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
456: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 457: $relationship,
1.33 www 458: &Apache::lonxml::get_param('value',$parstack,$safeeval),
459: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 460: )));
461: } elsif ($target eq 'edit') {
1.29 www 462: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 463: &Apache::edit::text_arg('Index/Name:','index',
464: $token,'10').' '.
1.35 www 465: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 466: [['0','Function itself'],
467: ['1','First derivative'],
1.42 www 468: ['2','Second derivative'],
469: ['-1','Integral']],$token).'<br />'.
1.44 ! www 470: &Apache::edit::text_arg('Initial x-value:','xinitial',
1.35 www 471: $token,'8').
1.44 ! www 472: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
! 473: [['start','Start of Plot'],
! 474: ['end','End of Plot']],$token,'8').'<br />'.
1.30 www 475:
1.44 ! www 476: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
1.35 www 477: $token,'8').
1.44 ! www 478: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
1.32 www 479: [['end','End of Plot']],$token,'8').'<br />'.
1.44 ! www 480: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
1.35 www 481: $token,'8').
1.44 ! www 482: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
1.35 www 483: $token,'8').'<br />'.
1.38 www 484: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 485: [['eq','equal'],
486: ['ne','not equal'],
487: ['ge','greater than or equal'],
488: ['gt','greater than'],
489: ['lt','less than'],
490: ['le','less than or equal']],$token).
491: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.35 www 492: [['undef','not defined']],$token,'8').
1.29 www 493: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 494: $token,'8').
1.29 www 495: &Apache::edit::end_row();
496: } elsif ($target eq 'modified') {
497: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 498: $safeeval,'index','derivativeorder',
499: 'xinitial','xinitiallabel','xfinal','xfinallabel',
500: 'minimumlength','maximumlength',
501: 'relationship','value','percenterror');
1.29 www 502: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 503: }
1.12 www 504: return $result;
505: }
506:
1.25 www 507: sub end_functionplotrule {
1.13 www 508: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
509: my $result='';
510: if ($target eq 'edit') {
511: $result=&Apache::edit::end_table();
512: }
513: return $result;
1.12 www 514: }
515:
516:
517: #
1.23 www 518: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 519: #
520: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
521: #
522: sub start_spline {
523: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 524: my $result='';
525: if ($target eq 'web') {
1.23 www 526: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 527: $Apache::functionplotresponse::counter++;
528: if ($label=~/\W/) {
1.23 www 529: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 530: }
531: $label=~s/\W//gs;
1.23 www 532: unless ($label) {
533: $label='S'.$Apache::functionplotresponse::counter;
534: } else {
535: $label='S'.$label;
536: }
1.13 www 537: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 538: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 539: }
540:
541: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
542: if ($order<2) { $order=2; }
543: if ($order>8) { $order=8; }
544: $Apache::functionplotresponse::splineorder{$label}=$order;
545:
546: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
547: unless ($x) { $x=0; }
548: $Apache::functionplotresponse::splineinitx{$label}=$x;
549:
550: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
551: unless ($y) { $y=0; }
552: $Apache::functionplotresponse::splineinity{$label}=$y;
553:
554: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
555: unless ($sx) { $sx=$order; }
556: $Apache::functionplotresponse::splinescalex{$label}=$sx;
557:
558: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
559: unless ($sy) { $sy=2; }
560: $Apache::functionplotresponse::splinescaley{$label}=$sy;
561: } elsif ($target eq 'edit') {
562: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 563: &Apache::edit::text_arg('Index:','index',
1.14 www 564: $token,'4').' '.
1.13 www 565: &Apache::edit::select_arg('Order:','order',
1.44 ! www 566: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 567: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 568: $token,'4').' '.
1.13 www 569: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 570: $token,'4').' '.
1.13 www 571: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 572: $token,'4').' '.
1.13 www 573: &Apache::edit::text_arg('Scale y:','scaley',
574: $token,'4').
575: &Apache::edit::end_row();
576: } elsif ($target eq 'modified') {
577: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 578: $safeeval,'index','order','initx','inity',
1.13 www 579: 'scalex','scaley');
580: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
581: }
582: return $result;
1.6 www 583: }
584:
585: sub end_spline {
1.13 www 586: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
587: my $result='';
588: if ($target eq 'edit') {
589: $result=&Apache::edit::end_table();
590: }
591: return $result;
1.4 www 592: }
593:
1.3 www 594: sub end_init_script {
595: return (<<ENDENDINIT);
596: }
597: // ]]>
598: </script>
599: ENDENDINIT
600: }
601:
1.10 www 602: #
603: # Storing and restoring spline coordinates from part answers
604: #
605: sub decode_previous_answer {
606: my ($answer)=@_;
607: foreach my $coordinate (split(/\,/,$answer)) {
608: my ($key,$value)=split(/\=/,$coordinate);
609: $Apache::functionplotresponse::previous{$key}=$value;
610: }
611: }
612:
613: sub get_answer_from_form_fields {
614: my ($id)=@_;
615: my $answer='';
616: my %coords=();
617: foreach my $field (keys(%env)) {
618: if ($field=~/^form\.HWVAL\_$id/) {
619: $field=~/^form\.(.*)$/;
620: $coords{$1}=$env{$field};
621: }
622: }
623: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
624: return ($answer,%coords);
625: }
626:
1.15 www 627: #
628: # The following functions calculate the cubic-hermite splines server-side
629: #
630:
631: sub cubic_hermite {
632: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 633: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
634: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 635: }
636:
637: #
638: # d/dt(...)
639: #
640:
641: sub ddt_cubic_hermite {
642: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 643: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
644: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 645: }
646:
647: #
648: # d^2/dt^2(...)
649: #
650:
651: sub d2dt2_cubic_hermite {
652: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 653: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
654: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 655: }
656:
657: #
1.18 www 658: # Array index calculation
659: #
660: sub array_index {
661: my ($xmin,$xmax,$x)=@_;
1.38 www 662: if ($x ne '') {
663: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
664: } else {
665: return undef;
666: }
1.20 www 667: }
668:
669: #
1.18 www 670: # Populate the arrays
671: #
672:
673: sub populate_arrays {
674: my ($id,$xmin,$xmax)=@_;
1.26 www 675: for (my $i=0; $i<=400; $i++) {
1.35 www 676: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 677: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 678: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 679: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 680: }
1.19 www 681: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 682: # Run over all splines in response
683: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 684: my $xiold=-1;
1.18 www 685: # Run over all points in spline
1.19 www 686: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 687: my $ni=$i+1;
688: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
689: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
690: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
691: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
692: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
693: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
694: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
695: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
696: # Run in small steps over spline parameter
1.26 www 697: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 698: my $xreal=&cubic_hermite($t,@xparms);
699: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 700: if ($xi<$xiold) { return 'no_func'; }
1.26 www 701: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.19 www 702: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
1.18 www 703: $xiold=$xi;
1.35 www 704: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 705: # Function value
1.30 www 706: my $funcval=&cubic_hermite($t,@yparms);
707: $Apache::functionplotresponse::func[$xi]=$funcval;
708: if (defined($funcval)) {
709: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
710: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
711: }
712: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
713: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
714: }
715: }
1.28 www 716: # Chain rule
1.22 www 717: # dy/dx=dy/dt/(dx/dt)
718: my $dxdt=&ddt_cubic_hermite($t,@xparms);
719: if ($dxdt) {
720: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 721: # Second derivative
1.28 www 722: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 723: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
724: ($dxdt*$dxdt*$dxdt);
1.22 www 725: }
1.18 www 726: }
727: }
728: }
729: }
730: }
731:
732: #
1.37 www 733: # Implementation of <functionplotresponse>
1.15 www 734: #
735:
1.1 www 736: sub start_functionplotresponse {
737: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
738: my $result='';
1.6 www 739: # To remember the splines - somehow, they need to come last
740: undef %Apache::functionplotresponse::splineorder;
741: undef %Apache::functionplotresponse::splineinitx;
742: undef %Apache::functionplotresponse::splineinity;
743: undef %Apache::functionplotresponse::splinescalex;
744: undef %Apache::functionplotresponse::splinescaley;
1.10 www 745: # Remember input fields, etc
746: undef %Apache::functionplotresponse::previous;
1.9 www 747: $Apache::functionplotresponse::inputfields='';
1.6 www 748: $Apache::functionplotresponse::counter=0;
1.24 www 749: # Remember rules
1.25 www 750: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 751: # Remember failed rules
752: if ($target eq 'grade') {
753: undef @Apache::functionplotresponse::failedrules;
754: }
755: # Delete previous awards
756: undef $Apache::functionplotresponse::awarddetail;
1.10 www 757: # Part and ID
758: my $partid=$Apache::inputtags::part;
759: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 760: # Internal ID to mark the applet and its coordinates
1.10 www 761: my $internalid = $partid.'_'.$id;
762: # Previous answer
763: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
764:
1.6 www 765: # Parameters of <functionplotresponse>
1.41 www 766: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 767: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
768: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
769: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 770: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
771: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 772: if ($target eq 'edit') {
773: $result.=&Apache::edit::start_table($token)
774: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
775: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 776: .&Apache::edit::deletelist($target,$token).' '
777: .&Apache::edit::insertlist($target,$token)
1.12 www 778: .'</span></td>'
779: ."<td> "
780: .&Apache::edit::end_row()
781: .&Apache::edit::start_spanning_row()
782: ."\n";
1.14 www 783: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
784: $token,'6').' '.
785: &Apache::edit::text_arg('Minimum x-value:','xmin',
786: $token,'4').' '.
1.12 www 787: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 788: $token,'4').' '.
1.12 www 789: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 790: ['yes','no'],$token).'<br />'.
1.14 www 791: &Apache::edit::text_arg('Label y-axis:','ylabel',
792: $token,'6').' '.
1.12 www 793: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 794: $token,'4').' '.
1.12 www 795: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 796: $token,'4').' '.
1.12 www 797: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 798: ['yes','no'],$token).'<br />'.
1.12 www 799: &Apache::edit::select_arg('Grid visible:','gridvisible',
800: ['yes','no'],$token).
801: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
802: } elsif ($target eq 'modified') {
803: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 804: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.12 www 805: 'xaxisvisible','yaxisvisible','gridvisible');
806: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 807:
1.12 www 808: } elsif ($target eq 'meta') {
1.10 www 809: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 810: } elsif (($target eq 'answer') &&
811: ($env{'form.answer_output_mode'} ne 'tex') &&
812: ($Apache::lonhomework::viewgrades == 'F')) {
813: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
814: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
815: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
816: {'only_body' => 1,
817: 'bgcolor' => '#FFFFFF',
818: 'js_ready' => 1,});
819: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
820: $uname =~s/\W//g;
821: $udom =~s/\W//g;
822: my $function_name =
823: join('_','LONCAPA_scriptvars',$uname,$udom,
824: $env{'form.counter'},$Apache::lonxml::curdepth);
825: my $rules_var ="<script type=\"text/javascript\">
826: // <![CDATA[
827: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
828: $Apache::functionplotresponse::ruleslog.
829: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
830: // ]]>
831: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
832: &Apache::lonxml::add_script_result($rules_var);
833: }
834:
1.1 www 835: return $result;
836: }
837:
1.25 www 838: sub compare_rel {
1.26 www 839: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 840: # is the real value undefined?
1.26 www 841: unless (defined($realval)) {
1.36 www 842: # the real value is not defined
1.26 www 843: if ($relationship eq 'eq') {
844: if ($value eq 'undef') {
845: return 1;
846: } else {
847: return 0;
848: }
849: } elsif ($relationship eq 'ne') {
850: if ($value eq 'undef') {
851: return 0;
852: } else {
853: return 1;
854: }
855: } else {
856: return 0;
857: }
858: }
859:
1.36 www 860: # is the expected value undefined?
861: if ($value eq 'undef') {
862: # but by now we know that the real value is defined
863: return 0;
864: }
865:
866: # both are defined.
1.26 www 867: if ($relationship eq 'gt') {
868: return ($realval>$value);
869: } elsif ($relationship eq 'ge') {
870: return ($realval>$value-$tol);
871: } elsif ($relationship eq 'lt') {
872: return ($realval<$value);
873: } elsif ($relationship eq 'le') {
874: return ($realval<$value+$tol);
875: } elsif ($relationship eq 'ne') {
876: return (abs($value-$realval)>$tol);
877: } else {
878: return (abs($value-$realval)<$tol);
879: }
1.25 www 880: return 0;
881: }
882:
1.35 www 883: sub addlog {
884: my ($text)=@_;
885: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
886: }
887:
888: sub actualval {
889: my ($i,$xmin,$xmax)=@_;
890: return $xmin+$i/400.*($xmax-$xmin);
891: }
892:
1.25 www 893: sub functionplotrulecheck {
1.33 www 894: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
895:
1.35 www 896: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 897: =split(/\:/,$rule);
1.33 www 898: $percent=($percent>0?$percent:5);
1.35 www 899: &addlog("=================");
1.42 www 900: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.30 www 901: my $li=0;
902: my $lh=400;
903:
1.31 www 904: # Special case: the upper boundary was not defined
905: # and needs to be set to the value where
906: # the condition is not true anymore => set flag
907:
908: my $findupper=0;
909: if (($xfinal eq '')
910: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
911: && ($xfinallabel)) {
912: $findupper=1;
913: }
914:
1.25 www 915: # if a hard value is set for the boundaries, it overrides the label
1.30 www 916: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
917: $li=&array_index($xmin,$xmax,$xinitial);
918: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
919: }
920: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
921: $lh=&array_index($xmin,$xmax,$xfinal);
922: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 923: }
1.31 www 924: # if the label is defined, use it
1.25 www 925: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 926: &addlog("Using lower label $xinitiallabel");
1.30 www 927: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
928: } else {
929: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 930: }
1.31 www 931: unless ($findupper) {
932: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 933: &addlog("Using upper label $xfinallabel");
1.33 www 934: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 935: } else {
936: $lh=&array_index($xmin,$xmax,$xfinal);
937: }
1.25 www 938: }
939: # Basic sanity checks
1.30 www 940: if ($li<0) { $li=0; }
941: if ($lh>400) { $lh=400; }
1.38 www 942: if (($li>$lh) || (!defined($lh))) {
1.30 www 943: $lh=$li;
1.25 www 944: }
1.31 www 945:
1.35 www 946: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
947: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
948: if ($findupper) {
949: &addlog("Looking for label $xfinallabel");
950: }
1.33 www 951: my $tol=$percent*($ymax-$ymin)/100;
952: if ($xmax>$xmin) {
953: if ($derivative==2) {
954: $tol=4.*$tol/($xmax-$xmin);
955: } elsif ($derivative==1) {
956: $tol=2.*$tol/($xmax-$xmin);
1.42 www 957: } elsif ($derivative==-1) {
958: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 959: }
1.27 www 960: }
1.42 www 961: my $integral=0;
962: my $binwidth=($xmax-$xmin)/400.;
963: if (($derivative<0) && (!$findupper)) {
964: # definite integral, calculate over whole length
965: &addlog("Calculating definite integral");
966: for (my $i=$li; $i<=$lh; $i++) {
967: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
968: }
969: unless (&compare_rel($relationship,$value,$integral,$tol)) {
970: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
971: &addlog("Rule $label failed.");
972: my $hintlabel=$label;
973: $hintlabel=~s/^R//;
974: push(@Apache::functionplotresponse::failedrules,$hintlabel);
975: &addlog("Set hint condition $hintlabel");
976: return 0;
977: }
978: } else {
979: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 980: my $val;
981: if ($derivative==2) {
1.27 www 982: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 983: } elsif ($derivative==1) {
1.27 www 984: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 985: } elsif ($derivative==-1) {
986: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
987: $val=$integral;
1.25 www 988: } else {
1.27 www 989: $val=$Apache::functionplotresponse::func[$i];
1.25 www 990: }
1.31 www 991: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 992: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 993: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 994: if (($findupper) && ($i>$li)) {
1.35 www 995: # check for minimum and maximum lengths
996: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
997: if ($minimumlength) {
998: if ($length<$minimumlength) {
999: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1000: return 0;
1001: }
1002: }
1003: if ($maximumlength) {
1004: if ($length>$maximumlength) {
1005: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1006: return 0;
1007: }
1008: }
1.31 www 1009: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1010: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1011: return 1;
1012: } else {
1.35 www 1013: &addlog("Rule $label failed.");
1.37 www 1014: my $hintlabel=$label;
1015: $hintlabel=~s/^R//;
1016: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1017: &addlog("Set hint condition $hintlabel");
1.31 www 1018: return 0;
1019: }
1020: }
1.42 www 1021: }
1.25 www 1022: }
1.35 www 1023: &addlog("Rule $label passed.");
1.27 www 1024: return 1;
1.24 www 1025: }
1026:
1.37 www 1027: sub start_functionplotruleset {
1028: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1029: if ($target eq 'edit') {
1030: return &Apache::edit::start_table($token).
1031: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1032: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1033: .&Apache::edit::deletelist($target,$token).' '.
1034: &Apache::edit::insertlist($target,$token)
1035: .'</span></td>'
1036: ."<td> "
1037: .&Apache::edit::end_row()
1038: .&Apache::edit::start_spanning_row()
1039: ."\n";
1040: }
1041: }
1.3 www 1042:
1.37 www 1043: sub end_functionplotruleset {
1044: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1045: my $id=$Apache::inputtags::response[-1];
1046: my $partid=$Apache::inputtags::part;
1047: my $internalid = $partid.'_'.$id;
1048:
1049: if ($target eq 'edit' ) {
1050: return &Apache::edit::end_table();
1051: } elsif ($target eq 'grade'
1.10 www 1052: && &Apache::response::submitted()
1053: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1054: #
1055: # Actually grade
1056: #
1.41 www 1057: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1058:
1.24 www 1059: my $ad='';
1.30 www 1060: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1061: $Apache::functionplotresponse::ruleslog='';
1.30 www 1062: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1063: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.18 www 1064: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
1.21 www 1065: $ad='NOT_FUNCTION';
1.18 www 1066: } else {
1.35 www 1067: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1068: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1069: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1070: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1071:
1.24 www 1072: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1073: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.33 www 1074: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
1.24 www 1075: $ad='INCORRECT';
1076: last;
1077: }
1078: }
1079: # If it's not wrong, it's correct
1080: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1081: }
1.37 www 1082: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1083: &addlog("Assigned award detail: $ad");
1084: # Store for later to be assigned at end_functionplotresponse
1085: $Apache::functionplotresponse::awarddetail=$ad;
1086: }
1087: }
1088:
1089:
1090: sub end_functionplotresponse {
1091: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1092: &Apache::response::end_response;
1093:
1094: my $result;
1095: my $id=$Apache::inputtags::response[-1];
1096: my $partid=$Apache::inputtags::part;
1097: my $internalid = $partid.'_'.$id;
1.20 www 1098:
1.37 www 1099: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1100: if ($target eq 'grade'
1101: && &Apache::response::submitted()
1102: && $Apache::lonhomework::type eq 'exam') {
1103:
1104: &Apache::response::scored_response($partid,$id);
1105:
1106: } elsif ($target eq 'grade'
1107: && &Apache::response::submitted()
1108: && $Apache::lonhomework::type ne 'exam') {
1109: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1110: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1111: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1112: #
1113: # Assign grade
1114: #
1115: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1116: #
1117: # Store grading info
1118: #
1119: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1120: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1121: } elsif ($target eq 'web') {
1.37 www 1122: undef @Apache::functionplotresponse::failedrules;
1123: }
1124: return $result;
1125: }
1126:
1127: sub end_functionplotelements {
1128: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1129: my $result='';
1130: my $id=$Apache::inputtags::response[-1];
1131: my $partid=$Apache::inputtags::part;
1132: my $internalid = $partid.'_'.$id;
1133: if ($target eq 'edit' ) {
1134: $result=&Apache::edit::end_table();
1135: } elsif ($target eq 'web') {
1.6 www 1136: # Now is the time to render all of the stored splines
1.41 www 1137: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.6 www 1138: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.40 www 1139: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax);
1.6 www 1140: }
1.5 www 1141: # close the init script
1.3 www 1142: $result.=&end_init_script();
1.17 www 1143: # register all splines in this response
1144: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1145: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1146: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1147: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1148: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1149: }
1.9 www 1150: # generate the input fields
1151: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1152: # actually start the <applet>-tag
1.3 www 1153: $result.=&geogebra_startcode($internalid);
1.5 www 1154: # load the spline bytecode
1.3 www 1155: $result.=&geogebra_spline_program();
1.5 www 1156: # set default parameters
1.3 www 1157: $result.=&geogebra_default_parameters($internalid);
1.5 www 1158: # close the <applet>-tag
1.1 www 1159: $result.=&geogebra_endcode();
1160: }
1161: return $result;
1162: }
1163:
1.41 www 1164: sub boundaries {
1165: my ($parstack,$safeeval,$level)=@_;
1166: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1167: $xmin=(defined($xmin)?$xmin:-10);
1168: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1169: $xmax=(defined($xmax)?$xmax:10);
1170: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1171: $ymin=(defined($ymin)?$ymin:-10);
1172: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1173: $ymax=(defined($ymax)?$ymax:10);
1174: if ($xmax<=$xmin) {
1175: $xmax=$xmin+20;
1176: }
1177: if ($ymax<=$ymin) {
1178: $ymax=$ymin+20;
1179: }
1180: return ($xmin,$xmax,$ymin,$ymax);
1181: }
1182:
1.37 www 1183: sub start_functionplotelements {
1184: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1185: my $result='';
1186: my $id=$Apache::inputtags::response[-1];
1187: my $partid=$Apache::inputtags::part;
1188: my $internalid = $partid.'_'.$id;
1189:
1190: if ($target eq 'edit') {
1191: return &Apache::edit::start_table($token).
1192: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1193: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1194: .&Apache::edit::deletelist($target,$token).' '.
1195: &Apache::edit::insertlist($target,$token)
1196: .'</span></td>'
1197: ."<td> "
1198: .&Apache::edit::end_row()
1199: .&Apache::edit::start_spanning_row()
1200: ."\n";
1201: } elsif ($target eq 'web') {
1.41 www 1202: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1203: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1204: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1205: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1206: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1207: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1208:
1209:
1210: # paste in the update routine to receive stuff back from the applet
1211: $result.=&update_script($internalid);
1212: # start the initscript for this applet
1213: $result.=&start_init_script($internalid);
1214: # put the axis commands inside
1215: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1216: $result.=&axes_label($internalid,$xlabel,$ylabel);
1217: # init script is left open
1218: }
1219: return $result;
1220: }
1221:
1.1 www 1222: 1;
1223:
1224: __END__
1225:
1226: =head1 NAME
1227:
1228: Apache::functionplotresponse.pm;
1229:
1230: =head1 SYNOPSIS
1231:
1232: Handles tags associated with accepting function plots.
1233:
1234: This is part of the LearningOnline Network with CAPA project
1235: described at http://www.lon-capa.org.
1236:
1237: =head1 HANDLER SUBROUTINE
1238:
1239: start_functionplotresponse()
1240:
1241: =head1 OTHER SUBROUTINES
1242:
1243: =over
1244:
1245: =item end_functionplotresponse()
1246:
1247: =back
1248:
1249: =cut
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