Annotation of loncom/homework/functionplotresponse.pm, revision 1.58
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.58 ! www 4: # $Id: functionplotresponse.pm,v 1.57 2011/03/31 16:10:07 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_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 50: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
52: ENDSTARTCODE
53: }
54:
55: sub geogebra_endcode {
1.2 www 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
57: }
58:
1.5 www 59: #
60: # This is the internal GeoGebra bytecode which defines the spline functions
61: #
1.2 www 62: sub geogebra_spline_program {
63: return (<<ENDSPLINEPROGRAM);
1.57 www 64: <param name="ggbBase64" value="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"/>
1.2 www 65: ENDSPLINEPROGRAM
66: }
67:
1.5 www 68: #
69: # The standard set of parameters inside <applet>
70: #
1.2 www 71: sub geogebra_default_parameters {
1.3 www 72: my ($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" />
1.56 www 78: <param name="cache_version" value="3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0, 3.9.214.0" />
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)).
1.52 www 111: ") { setTimeout('ggbInitAll()',200) }";
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 {
1.48 www 164: my ($id,$variable,$x,$y,$fixed)=@_;
165: my $mult=($fixed?'a*':'');
1.6 www 166: return (<<ENDSETVARIABLE);
1.48 www 167: document.ggbApplet_$id.evalCommand("a=1");
168: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
1.40 www 169: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 170: ENDSETVARIABLE
171: }
172:
173: #
1.40 www 174: # Set a slope coordinate variable
175: #
176: sub set_slope_coordinate {
1.48 www 177: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
1.40 www 178: my $xvariable=$variable.'x';
179: my $yvariable=$variable.'y';
180: my $domain=$xmax-$xmin;
181: my $range=$ymax-$ymin;
182: my $xinterval=$domain/100.;
183: my $yinterval=$range/200.;
1.48 www 184: my $mult=($fixed?'a*':'');
1.40 www 185: return (<<ENDSETSVARIABLE);
1.48 www 186: document.ggbApplet_$id.evalCommand("a=1");
1.51 www 187: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
1.40 www 188: document.ggbApplet_$id.setVisible("$xvariable", false);
189: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
190: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
191: document.ggbApplet_$id.setVisible("$yvariable", false);
192: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
1.48 www 193: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
1.40 www 194: document.ggbApplet_$id.setLabelVisible("$variable", false);
195: ENDSETSVARIABLE
196: }
197:
198: #
1.9 www 199: # Input field name for a coordinate variable
200: #
201:
202: sub field_name {
203: my ($id,$variable,$name)=@_;
204: return "HWVAL_$id\_$variable\_$name";
205: }
206:
207: #
208: # Generate an input field for a coordinate variable
209: #
210:
211: sub generate_input_field {
212: my ($id,$variable,$x,$y)=@_;
213: $Apache::functionplotresponse::inputfields.=
214: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
215: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
216: }
217:
218: #
1.40 www 219: # Initialize a new point coordinate variable at set a listener on it
1.6 www 220: #
1.40 www 221: sub new_point_coordinate {
1.48 www 222: my ($id,$variable,$x,$y,$fixed)=@_;
1.11 www 223: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 224: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
225: }
1.11 www 226: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 227: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
228: }
1.9 www 229: &generate_input_field($id,$variable,$x,$y);
1.48 www 230: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
1.40 www 231: }
232:
233: #
234: # Initialize a new slope coordinate variable at set a listener on it
235: #
236: sub new_slope_coordinate {
1.48 www 237: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.40 www 238: #
239: # $variable: name of the slope point
240: # $x, $y: coordinates of the slope point
241: # $pointname: name of the associated point point
242: # $xp $yp: coordinates of the point point
243: #
244: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
245: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
246: }
247: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
248: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
249: }
250: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
251: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
252: }
253: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
254: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
255: }
256:
257: &generate_input_field($id,$variable,$x,$y);
258: my $xrel=$x-$xp;
259: my $yrel=$y-$yp;
1.48 www 260: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
1.5 www 261: }
262:
263: #
264: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
265: # It then starts the right headers
266: #
1.3 www 267: sub start_init_script {
268: my ($id)=@_;
1.16 www 269: # Add id to the list of ggbInit_$id functions that need to be called
270: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 271: # ... and open this function
1.3 www 272: return (<<ENDSTARTINIT);
273: <script type="text/javascript">
274: // <![CDATA[
1.5 www 275: // variable that will eventually be passed back to the server
276: var coordinateMap_$id = [];
1.16 www 277: // flag for not loaded yet
278: var loaded_$id=false;
1.5 www 279: // Init-function for applet
1.3 www 280: function ggbInit_$id() {
281: ENDSTARTINIT
282: }
283:
1.5 www 284: #
285: # This sets the axes inside ggbInit_$id
286: #
287:
1.4 www 288: sub axes_script {
289: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
290: return (<<ENDAXESSCRIPT);
291: // changes (xmin, xmax, ymin, ymax)
292: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
293:
294: // makes the (x,y) axis (in)visible
295: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
296: // makes the grid (in)visible
297: document.ggbApplet_$id.setGridVisible($gvisible);
298: ENDAXESSCRIPT
299: }
300:
1.14 www 301: sub axes_label {
1.45 www 302: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
1.14 www 303: unless ($xlabel || $ylabel) { return ''; }
304: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
305: if ($xlabel) {
1.45 www 306: if (($ymin<0) && ($ymax>0)) {
1.14 www 307: $return.=(<<ENDXAXISLABELSCRIPT);
308: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
309: document.ggbApplet_$id.setVisible("Xlabel",false);
310: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
311: ENDXAXISLABELSCRIPT
1.45 www 312: } else {
313: $return.=(<<ENDXOFFAXISLABEL);
314: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
315: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
316: ENDXOFFAXISLABEL
317: }
1.14 www 318: }
319: if ($ylabel) {
1.45 www 320: if (($xmin<0) && ($xmax>0)) {
1.14 www 321: $return.=(<<ENDYAXISLABELSCRIPT);
322: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
323: document.ggbApplet_$id.setVisible("Ylabel",false);
324: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
325: ENDYAXISLABELSCRIPT
1.45 www 326: } else {
327: $return.=(<<ENDYOFFAXISLABEL);
328: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
329: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
330: ENDYOFFAXISLABEL
331: }
1.14 www 332: }
333: return $return;
334: }
335:
1.58 ! www 336: #
! 337: # Subroutine to produce background and answer plots
! 338: #
! 339:
1.4 www 340: sub plot_script {
1.47 www 341: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
1.41 www 342: $label=~s/\W//g;
343: if (($label) && ($label!~/^[A-Za-z]/)) {
344: $label='C'.$label;
345: }
346: my $visible=0;
347: if ($label) {
348: $visible="1";
349: } else {
350: $Apache::functionplotresponse::counter++;
351: $label='C'.$Apache::functionplotresponse::counter;
352: }
1.46 www 353: my $rc=0;
354: my $gc=0;
355: my $bc=0;
356: if ($color) {
357: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
358: $rc=hex($rh);
359: $gc=hex($gh);
360: $bc=hex($bh);
361: }
1.6 www 362: if ($fixed) {
1.43 www 363: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
1.46 www 364: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
1.47 www 365: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
366: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
1.6 www 367: } else {
1.46 www 368: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
1.6 www 369: }
1.4 www 370: }
371:
1.5 www 372: #
1.58 ! www 373: # Answer spline display
! 374: #
! 375: # points: x,y,slope_x,slope_y
! 376:
! 377: sub answer_spline_script {
! 378: my ($id,@points)=@_;
! 379: my $order=int(($#points+1)/4);
! 380: if ($order<2) { $order=2; }
! 381: if ($order>8) { $order=8; }
! 382: $Apache::functionplotresponse::counter++;
! 383: my $label='C'.$Apache::functionplotresponse::counter;
! 384: }
! 385:
! 386: #
1.7 www 387: # Subroutine that generates code for spline $label based on stored information
1.6 www 388: #
389:
390: sub generate_spline {
1.48 www 391: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.6 www 392: my $result='';
1.7 www 393: my $order=$Apache::functionplotresponse::splineorder{$label};
394: my $x=$Apache::functionplotresponse::splineinitx{$label};
395: my $y=$Apache::functionplotresponse::splineinity{$label};
396: my $sx=$Apache::functionplotresponse::splinescalex{$label};
397: my $sy=$Apache::functionplotresponse::splinescaley{$label};
398: my @coords=();
399: foreach my $i (1..$order) {
1.48 www 400: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
1.40 www 401: my $xp=$x;
1.8 www 402: $x+=$sx/(2.*($order-1));
1.7 www 403: push(@coords,$label.'P'.$i);
1.48 www 404: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
1.8 www 405: $x+=$sx/(2.*($order-1));
1.7 www 406: push(@coords,$label.'S'.$i);
407: }
408: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 409: return $result;
410: }
411: #
412: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 413: #
1.4 www 414: sub start_backgroundplot {
415: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
416: my $result='';
417: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
418: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.47 www 419: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
420: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
1.41 www 421: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.46 www 422: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
423: $color=~s/[^a-fA-F0-9]//gs;
424: unless (length($color)==6) { $color=''; }
1.6 www 425: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
426:
1.4 www 427: unless ($function) { $function="0"; }
428: if ($target eq 'web') {
1.41 www 429: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
1.47 www 430: unless (defined($xinitial)) { $xinitial=$xmin; }
431: unless (defined($xfinal)) { $xfinal=$xmax; }
432: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
1.13 www 433: } elsif ($target eq 'edit') {
434: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
435: &Apache::edit::text_arg('Function:','function',
436: $token,'16').
1.47 www 437: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
438: $token,'8').
439: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
440: $token,'8').
1.41 www 441: &Apache::edit::text_arg('Label on Plot:','label',
442: $token,'8').
1.46 www 443: &Apache::edit::text_arg('Color (hex code):','color',
444: $token,'8').
1.13 www 445: &Apache::edit::select_arg('Fixed location:','fixed',
446: ['yes','no'],$token).
447: &Apache::edit::end_row();
448: } elsif ($target eq 'modified') {
449: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.47 www 450: $safeeval,'function','label','xinitial','xfinal','color','fixed');
1.13 www 451: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
452: }
453: return $result;
1.4 www 454: }
455:
456: sub end_backgroundplot {
1.13 www 457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
458: my $result='';
459: if ($target eq 'edit') {
460: $result=&Apache::edit::end_table();
461: }
462: return $result;
1.6 www 463: }
464:
465: #
1.25 www 466: # <functionplotrule ... />
1.12 www 467: #
1.25 www 468: sub start_functionplotrule {
1.12 www 469: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
470: my $result='';
1.24 www 471: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
472: $Apache::functionplotresponse::counter++;
473: if ($label=~/\W/) {
1.25 www 474: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 475: }
476: $label=~s/\W//gs;
477: unless ($label) {
478: $label='R'.$Apache::functionplotresponse::counter;
479: } else {
480: $label='R'.$label;
481: }
482: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 483: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 484: }
485:
486:
487: if ($target eq 'grade') {
488: # Simply remember - in order - for later
1.25 www 489: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
490: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 491: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 492: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 493: }
494: $beginninglabel=~s/\W//gs;
495: $endinglabel=~s/\W//gs;
496: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
497: $relationship=~s/\W//gs;
498: $relationship=lc($relationship);
499: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 500: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 501: $relationship='eq';
502: }
1.35 www 503: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 504: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 505: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 506: $derivative=0;
507: }
1.25 www 508: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 509: $label,
510: $derivative,
1.25 www 511: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 512: $beginninglabel,
1.25 www 513: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 514: $endinglabel,
1.35 www 515: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
516: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 517: $relationship,
1.33 www 518: &Apache::lonxml::get_param('value',$parstack,$safeeval),
519: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 520: )));
521: } elsif ($target eq 'edit') {
1.29 www 522: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 523: &Apache::edit::text_arg('Index/Name:','index',
524: $token,'10').' '.
1.35 www 525: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 526: [['0','Function itself'],
527: ['1','First derivative'],
1.42 www 528: ['2','Second derivative'],
529: ['-1','Integral']],$token).'<br />'.
1.44 www 530: &Apache::edit::text_arg('Initial x-value:','xinitial',
1.35 www 531: $token,'8').
1.44 www 532: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
533: [['start','Start of Plot'],
534: ['end','End of Plot']],$token,'8').'<br />'.
1.30 www 535:
1.44 www 536: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
1.35 www 537: $token,'8').
1.44 www 538: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
1.32 www 539: [['end','End of Plot']],$token,'8').'<br />'.
1.44 www 540: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
1.35 www 541: $token,'8').
1.44 www 542: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
1.35 www 543: $token,'8').'<br />'.
1.38 www 544: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 545: [['eq','equal'],
546: ['ne','not equal'],
547: ['ge','greater than or equal'],
548: ['gt','greater than'],
549: ['lt','less than'],
550: ['le','less than or equal']],$token).
551: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.35 www 552: [['undef','not defined']],$token,'8').
1.29 www 553: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 554: $token,'8').
1.29 www 555: &Apache::edit::end_row();
556: } elsif ($target eq 'modified') {
1.54 www 557: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
1.53 www 558: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
559: }
1.54 www 560: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
1.53 www 561: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
562: }
1.29 www 563: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 564: $safeeval,'index','derivativeorder',
565: 'xinitial','xinitiallabel','xfinal','xfinallabel',
566: 'minimumlength','maximumlength',
567: 'relationship','value','percenterror');
1.29 www 568: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 569: }
1.12 www 570: return $result;
571: }
572:
1.25 www 573: sub end_functionplotrule {
1.13 www 574: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
575: my $result='';
576: if ($target eq 'edit') {
577: $result=&Apache::edit::end_table();
578: }
579: return $result;
1.12 www 580: }
581:
582:
583: #
1.23 www 584: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 585: #
586: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
587: #
588: sub start_spline {
589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 590: my $result='';
591: if ($target eq 'web') {
1.23 www 592: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 593: $Apache::functionplotresponse::counter++;
594: if ($label=~/\W/) {
1.23 www 595: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 596: }
597: $label=~s/\W//gs;
1.23 www 598: unless ($label) {
599: $label='S'.$Apache::functionplotresponse::counter;
600: } else {
601: $label='S'.$label;
602: }
1.13 www 603: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 604: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 605: }
606:
607: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
608: if ($order<2) { $order=2; }
609: if ($order>8) { $order=8; }
610: $Apache::functionplotresponse::splineorder{$label}=$order;
611:
612: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
613: unless ($x) { $x=0; }
614: $Apache::functionplotresponse::splineinitx{$label}=$x;
615:
616: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
617: unless ($y) { $y=0; }
618: $Apache::functionplotresponse::splineinity{$label}=$y;
619:
620: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
621: unless ($sx) { $sx=$order; }
622: $Apache::functionplotresponse::splinescalex{$label}=$sx;
623:
624: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
625: unless ($sy) { $sy=2; }
626: $Apache::functionplotresponse::splinescaley{$label}=$sy;
627: } elsif ($target eq 'edit') {
628: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 629: &Apache::edit::text_arg('Index:','index',
1.14 www 630: $token,'4').' '.
1.13 www 631: &Apache::edit::select_arg('Order:','order',
1.44 www 632: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 633: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 634: $token,'4').' '.
1.13 www 635: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 636: $token,'4').' '.
1.13 www 637: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 638: $token,'4').' '.
1.13 www 639: &Apache::edit::text_arg('Scale y:','scaley',
640: $token,'4').
641: &Apache::edit::end_row();
642: } elsif ($target eq 'modified') {
643: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 644: $safeeval,'index','order','initx','inity',
1.13 www 645: 'scalex','scaley');
646: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
647: }
648: return $result;
1.6 www 649: }
650:
651: sub end_spline {
1.13 www 652: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
653: my $result='';
654: if ($target eq 'edit') {
655: $result=&Apache::edit::end_table();
656: }
657: return $result;
1.4 www 658: }
659:
1.3 www 660: sub end_init_script {
661: return (<<ENDENDINIT);
662: }
663: // ]]>
664: </script>
665: ENDENDINIT
666: }
667:
1.10 www 668: #
669: # Storing and restoring spline coordinates from part answers
670: #
671: sub decode_previous_answer {
672: my ($answer)=@_;
673: foreach my $coordinate (split(/\,/,$answer)) {
674: my ($key,$value)=split(/\=/,$coordinate);
675: $Apache::functionplotresponse::previous{$key}=$value;
676: }
677: }
678:
679: sub get_answer_from_form_fields {
680: my ($id)=@_;
681: my $answer='';
682: my %coords=();
683: foreach my $field (keys(%env)) {
684: if ($field=~/^form\.HWVAL\_$id/) {
685: $field=~/^form\.(.*)$/;
686: $coords{$1}=$env{$field};
687: }
688: }
689: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
690: return ($answer,%coords);
691: }
692:
1.15 www 693: #
694: # The following functions calculate the cubic-hermite splines server-side
695: #
696:
697: sub cubic_hermite {
698: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 699: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
700: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 701: }
702:
703: #
704: # d/dt(...)
705: #
706:
707: sub ddt_cubic_hermite {
708: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 709: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
710: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 711: }
712:
713: #
714: # d^2/dt^2(...)
715: #
716:
717: sub d2dt2_cubic_hermite {
718: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 719: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
720: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 721: }
722:
723: #
1.18 www 724: # Array index calculation
725: #
726: sub array_index {
727: my ($xmin,$xmax,$x)=@_;
1.38 www 728: if ($x ne '') {
729: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
730: } else {
731: return undef;
732: }
1.20 www 733: }
734:
735: #
1.18 www 736: # Populate the arrays
737: #
738:
739: sub populate_arrays {
740: my ($id,$xmin,$xmax)=@_;
1.26 www 741: for (my $i=0; $i<=400; $i++) {
1.35 www 742: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 743: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 744: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 745: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 746: }
1.19 www 747: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 748: # Run over all splines in response
749: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 750: my $xiold=-1;
1.18 www 751: # Run over all points in spline
1.19 www 752: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 753: my $ni=$i+1;
754: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
755: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
756: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
757: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
758: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
759: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
760: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
761: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
762: # Run in small steps over spline parameter
1.26 www 763: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 764: my $xreal=&cubic_hermite($t,@xparms);
765: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 766: if ($xi<$xiold) { return 'no_func'; }
1.26 www 767: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.19 www 768: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
1.18 www 769: $xiold=$xi;
1.35 www 770: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 771: # Function value
1.30 www 772: my $funcval=&cubic_hermite($t,@yparms);
773: $Apache::functionplotresponse::func[$xi]=$funcval;
774: if (defined($funcval)) {
775: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
776: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
777: }
778: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
779: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
780: }
781: }
1.28 www 782: # Chain rule
1.22 www 783: # dy/dx=dy/dt/(dx/dt)
784: my $dxdt=&ddt_cubic_hermite($t,@xparms);
785: if ($dxdt) {
786: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 787: # Second derivative
1.28 www 788: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 789: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
790: ($dxdt*$dxdt*$dxdt);
1.22 www 791: }
1.18 www 792: }
793: }
794: }
795: }
796: }
797:
798: #
1.37 www 799: # Implementation of <functionplotresponse>
1.15 www 800: #
801:
1.1 www 802: sub start_functionplotresponse {
803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
804: my $result='';
1.6 www 805: # To remember the splines - somehow, they need to come last
806: undef %Apache::functionplotresponse::splineorder;
807: undef %Apache::functionplotresponse::splineinitx;
808: undef %Apache::functionplotresponse::splineinity;
809: undef %Apache::functionplotresponse::splinescalex;
810: undef %Apache::functionplotresponse::splinescaley;
1.10 www 811: # Remember input fields, etc
812: undef %Apache::functionplotresponse::previous;
1.9 www 813: $Apache::functionplotresponse::inputfields='';
1.6 www 814: $Apache::functionplotresponse::counter=0;
1.24 www 815: # Remember rules
1.25 www 816: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 817: # Remember failed rules
818: if ($target eq 'grade') {
819: undef @Apache::functionplotresponse::failedrules;
820: }
821: # Delete previous awards
822: undef $Apache::functionplotresponse::awarddetail;
1.10 www 823: # Part and ID
824: my $partid=$Apache::inputtags::part;
825: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 826: # Internal ID to mark the applet and its coordinates
1.10 www 827: my $internalid = $partid.'_'.$id;
828: # Previous answer
829: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
830:
1.6 www 831: # Parameters of <functionplotresponse>
1.41 www 832: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 833: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
834: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
835: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 836: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
837: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 838: if ($target eq 'edit') {
839: $result.=&Apache::edit::start_table($token)
840: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
841: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 842: .&Apache::edit::deletelist($target,$token).' '
1.50 www 843: .&Apache::edit::insertlist($target,$token).' '
844: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1.12 www 845: .'</span></td>'
846: ."<td> "
847: .&Apache::edit::end_row()
848: .&Apache::edit::start_spanning_row()
849: ."\n";
1.14 www 850: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
851: $token,'6').' '.
852: &Apache::edit::text_arg('Minimum x-value:','xmin',
853: $token,'4').' '.
1.12 www 854: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 855: $token,'4').' '.
1.12 www 856: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 857: ['yes','no'],$token).'<br />'.
1.14 www 858: &Apache::edit::text_arg('Label y-axis:','ylabel',
859: $token,'6').' '.
1.12 www 860: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 861: $token,'4').' '.
1.12 www 862: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 863: $token,'4').' '.
1.12 www 864: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 865: ['yes','no'],$token).'<br />'.
1.12 www 866: &Apache::edit::select_arg('Grid visible:','gridvisible',
1.47 www 867: ['yes','no'],$token).'<br />'.
1.58 ! www 868: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1.47 www 869: 'answerdisplay',$token,'50');
870:
1.12 www 871: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
872: } elsif ($target eq 'modified') {
873: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 874: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.47 www 875: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1.12 www 876: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 877:
1.12 www 878: } elsif ($target eq 'meta') {
1.10 www 879: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 880: } elsif (($target eq 'answer') &&
881: ($env{'form.answer_output_mode'} ne 'tex') &&
882: ($Apache::lonhomework::viewgrades == 'F')) {
883: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
884: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
885: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
886: {'only_body' => 1,
887: 'bgcolor' => '#FFFFFF',
888: 'js_ready' => 1,});
889: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
890: $uname =~s/\W//g;
891: $udom =~s/\W//g;
892: my $function_name =
893: join('_','LONCAPA_scriptvars',$uname,$udom,
894: $env{'form.counter'},$Apache::lonxml::curdepth);
895: my $rules_var ="<script type=\"text/javascript\">
896: // <![CDATA[
897: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
898: $Apache::functionplotresponse::ruleslog.
899: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
900: // ]]>
901: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
902: &Apache::lonxml::add_script_result($rules_var);
903: }
904:
1.1 www 905: return $result;
906: }
907:
1.25 www 908: sub compare_rel {
1.26 www 909: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 910: # is the real value undefined?
1.26 www 911: unless (defined($realval)) {
1.36 www 912: # the real value is not defined
1.26 www 913: if ($relationship eq 'eq') {
914: if ($value eq 'undef') {
915: return 1;
916: } else {
917: return 0;
918: }
919: } elsif ($relationship eq 'ne') {
920: if ($value eq 'undef') {
921: return 0;
922: } else {
923: return 1;
924: }
925: } else {
926: return 0;
927: }
928: }
929:
1.36 www 930: # is the expected value undefined?
931: if ($value eq 'undef') {
932: # but by now we know that the real value is defined
933: return 0;
934: }
935:
936: # both are defined.
1.26 www 937: if ($relationship eq 'gt') {
938: return ($realval>$value);
939: } elsif ($relationship eq 'ge') {
940: return ($realval>$value-$tol);
941: } elsif ($relationship eq 'lt') {
942: return ($realval<$value);
943: } elsif ($relationship eq 'le') {
944: return ($realval<$value+$tol);
945: } elsif ($relationship eq 'ne') {
946: return (abs($value-$realval)>$tol);
947: } else {
948: return (abs($value-$realval)<$tol);
949: }
1.25 www 950: return 0;
951: }
952:
1.35 www 953: sub addlog {
954: my ($text)=@_;
955: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
956: }
957:
958: sub actualval {
959: my ($i,$xmin,$xmax)=@_;
960: return $xmin+$i/400.*($xmax-$xmin);
961: }
962:
1.25 www 963: sub functionplotrulecheck {
1.33 www 964: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
965:
1.35 www 966: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 967: =split(/\:/,$rule);
1.33 www 968: $percent=($percent>0?$percent:5);
1.35 www 969: &addlog("=================");
1.42 www 970: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.49 www 971: if ((defined($minimumlength)) || (defined($maximumlength))) {
972: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
973: }
1.30 www 974: my $li=0;
975: my $lh=400;
976:
1.31 www 977: # Special case: the upper boundary was not defined
978: # and needs to be set to the value where
979: # the condition is not true anymore => set flag
980:
981: my $findupper=0;
982: if (($xfinal eq '')
983: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
984: && ($xfinallabel)) {
985: $findupper=1;
986: }
987:
1.25 www 988: # if a hard value is set for the boundaries, it overrides the label
1.30 www 989: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
990: $li=&array_index($xmin,$xmax,$xinitial);
991: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
992: }
993: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
994: $lh=&array_index($xmin,$xmax,$xfinal);
995: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 996: }
1.31 www 997: # if the label is defined, use it
1.25 www 998: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 999: &addlog("Using lower label $xinitiallabel");
1.30 www 1000: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1001: } else {
1002: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 1003: }
1.31 www 1004: unless ($findupper) {
1005: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 1006: &addlog("Using upper label $xfinallabel");
1.33 www 1007: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 1008: } else {
1009: $lh=&array_index($xmin,$xmax,$xfinal);
1010: }
1.25 www 1011: }
1012: # Basic sanity checks
1.30 www 1013: if ($li<0) { $li=0; }
1014: if ($lh>400) { $lh=400; }
1.38 www 1015: if (($li>$lh) || (!defined($lh))) {
1.30 www 1016: $lh=$li;
1.25 www 1017: }
1.31 www 1018:
1.35 www 1019: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1020: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1021: if ($findupper) {
1022: &addlog("Looking for label $xfinallabel");
1023: }
1.33 www 1024: my $tol=$percent*($ymax-$ymin)/100;
1025: if ($xmax>$xmin) {
1026: if ($derivative==2) {
1027: $tol=4.*$tol/($xmax-$xmin);
1028: } elsif ($derivative==1) {
1029: $tol=2.*$tol/($xmax-$xmin);
1.42 www 1030: } elsif ($derivative==-1) {
1031: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 1032: }
1.27 www 1033: }
1.42 www 1034: my $integral=0;
1035: my $binwidth=($xmax-$xmin)/400.;
1036: if (($derivative<0) && (!$findupper)) {
1037: # definite integral, calculate over whole length
1038: &addlog("Calculating definite integral");
1039: for (my $i=$li; $i<=$lh; $i++) {
1040: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1041: }
1042: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1043: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1044: &addlog("Rule $label failed.");
1045: my $hintlabel=$label;
1046: $hintlabel=~s/^R//;
1047: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1048: &addlog("Set hint condition $hintlabel");
1049: return 0;
1050: }
1051: } else {
1052: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 1053: my $val;
1054: if ($derivative==2) {
1.27 www 1055: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 1056: } elsif ($derivative==1) {
1.27 www 1057: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 1058: } elsif ($derivative==-1) {
1059: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1060: $val=$integral;
1.25 www 1061: } else {
1.27 www 1062: $val=$Apache::functionplotresponse::func[$i];
1.25 www 1063: }
1.31 www 1064: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 1065: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 1066: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 1067: if (($findupper) && ($i>$li)) {
1.49 www 1068: # Check lengths
1069: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1070: # Successfully found a new label, set it
1.31 www 1071: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1072: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1073: return 1;
1074: } else {
1.35 www 1075: &addlog("Rule $label failed.");
1.49 www 1076: &setfailed($label);
1.31 www 1077: return 0;
1078: }
1079: }
1.42 www 1080: }
1.25 www 1081: }
1.49 www 1082: # Corner case where this makes sense: using start or stop as defined labels
1083: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1.35 www 1084: &addlog("Rule $label passed.");
1.27 www 1085: return 1;
1.24 www 1086: }
1087:
1.49 www 1088: #
1089: # check for minimum and maximum lengths
1090: #
1091:
1092: sub checklength {
1093: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1094: unless (($minimumlength) || ($maximumlength)) { return 1; }
1095: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1096: if ($minimumlength) {
1097: if ($length<$minimumlength) {
1098: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1099: &setfailed($label);
1100: return 0;
1101: }
1102: }
1103: if ($maximumlength) {
1104: if ($length>$maximumlength) {
1105: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1106: &setfailed($label);
1107: return 0;
1108: }
1109: }
1110: return 1;
1111: }
1112:
1113: sub setfailed {
1114: my ($label)=@_;
1115: my $hintlabel=$label;
1116: $hintlabel=~s/^R//;
1117: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1118: &addlog("Set hint condition $hintlabel");
1119: }
1120:
1.37 www 1121: sub start_functionplotruleset {
1122: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1123: if ($target eq 'edit') {
1124: return &Apache::edit::start_table($token).
1125: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1126: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1127: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1128: &Apache::edit::insertlist($target,$token).' '
1129: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1.37 www 1130: .'</span></td>'
1131: ."<td> "
1132: .&Apache::edit::end_row()
1133: .&Apache::edit::start_spanning_row()
1134: ."\n";
1135: }
1136: }
1.3 www 1137:
1.37 www 1138: sub end_functionplotruleset {
1139: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1140: my $id=$Apache::inputtags::response[-1];
1141: my $partid=$Apache::inputtags::part;
1142: my $internalid = $partid.'_'.$id;
1143:
1144: if ($target eq 'edit' ) {
1145: return &Apache::edit::end_table();
1146: } elsif ($target eq 'grade'
1.10 www 1147: && &Apache::response::submitted()
1148: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1149: #
1150: # Actually grade
1151: #
1.41 www 1152: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1153:
1.24 www 1154: my $ad='';
1.30 www 1155: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1156: $Apache::functionplotresponse::ruleslog='';
1.30 www 1157: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1158: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.18 www 1159: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
1.21 www 1160: $ad='NOT_FUNCTION';
1.18 www 1161: } else {
1.35 www 1162: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1163: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1164: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1165: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1166:
1.24 www 1167: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1168: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.33 www 1169: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
1.24 www 1170: $ad='INCORRECT';
1171: last;
1172: }
1173: }
1174: # If it's not wrong, it's correct
1175: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1176: }
1.37 www 1177: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1178: &addlog("Assigned award detail: $ad");
1179: # Store for later to be assigned at end_functionplotresponse
1180: $Apache::functionplotresponse::awarddetail=$ad;
1181: }
1182: }
1183:
1184:
1185: sub end_functionplotresponse {
1186: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1187: &Apache::response::end_response;
1188:
1189: my $result;
1190: my $id=$Apache::inputtags::response[-1];
1191: my $partid=$Apache::inputtags::part;
1192: my $internalid = $partid.'_'.$id;
1.20 www 1193:
1.37 www 1194: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1195: if ($target eq 'grade'
1196: && &Apache::response::submitted()
1197: && $Apache::lonhomework::type eq 'exam') {
1198:
1199: &Apache::response::scored_response($partid,$id);
1200:
1201: } elsif ($target eq 'grade'
1202: && &Apache::response::submitted()
1203: && $Apache::lonhomework::type ne 'exam') {
1204: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1205: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1206: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1207: #
1208: # Assign grade
1209: #
1210: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1211: #
1212: # Store grading info
1213: #
1214: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1215: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1216: } elsif ($target eq 'web') {
1.37 www 1217: undef @Apache::functionplotresponse::failedrules;
1218: }
1219: return $result;
1220: }
1221:
1222: sub end_functionplotelements {
1223: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1224: my $result='';
1225: my $id=$Apache::inputtags::response[-1];
1226: my $partid=$Apache::inputtags::part;
1227: my $internalid = $partid.'_'.$id;
1228: if ($target eq 'edit' ) {
1229: $result=&Apache::edit::end_table();
1230: } elsif ($target eq 'web') {
1.47 www 1231: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1232:
1233: # Are we in show answer mode?
1234: my $showanswer=&Apache::response::show_answer();
1235: if ($showanswer) {
1236: # Render answerdisplay
1237: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1238: if ($answerdisplay=~/\S/s) {
1239: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1.58 ! www 1240: my @components=split(/\s*\:\s*/,$plot);
! 1241: if ($#components<3) {
! 1242: # Just a simple plot
! 1243: my ($func,$xl,$xh)=@components;
! 1244: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
! 1245: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
! 1246: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
! 1247: } else {
! 1248: # This is a spline
! 1249: $result.=&answer_spline_script(@components);
! 1250: }
1.47 www 1251: }
1252: }
1253: }
1.48 www 1254: my $fixed=0;
1255: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1.6 www 1256: # Now is the time to render all of the stored splines
1257: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.48 www 1258: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1.6 www 1259: }
1.5 www 1260: # close the init script
1.3 www 1261: $result.=&end_init_script();
1.17 www 1262: # register all splines in this response
1263: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1264: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1265: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1266: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1267: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1268: }
1.9 www 1269: # generate the input fields
1270: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1271: # actually start the <applet>-tag
1.3 www 1272: $result.=&geogebra_startcode($internalid);
1.5 www 1273: # load the spline bytecode
1.3 www 1274: $result.=&geogebra_spline_program();
1.5 www 1275: # set default parameters
1.3 www 1276: $result.=&geogebra_default_parameters($internalid);
1.5 www 1277: # close the <applet>-tag
1.1 www 1278: $result.=&geogebra_endcode();
1279: }
1280: return $result;
1281: }
1282:
1.41 www 1283: sub boundaries {
1284: my ($parstack,$safeeval,$level)=@_;
1285: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1286: $xmin=(defined($xmin)?$xmin:-10);
1287: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1288: $xmax=(defined($xmax)?$xmax:10);
1289: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1290: $ymin=(defined($ymin)?$ymin:-10);
1291: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1292: $ymax=(defined($ymax)?$ymax:10);
1293: if ($xmax<=$xmin) {
1294: $xmax=$xmin+20;
1295: }
1296: if ($ymax<=$ymin) {
1297: $ymax=$ymin+20;
1298: }
1299: return ($xmin,$xmax,$ymin,$ymax);
1300: }
1301:
1.37 www 1302: sub start_functionplotelements {
1303: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1304: my $result='';
1305: my $id=$Apache::inputtags::response[-1];
1306: my $partid=$Apache::inputtags::part;
1307: my $internalid = $partid.'_'.$id;
1308:
1309: if ($target eq 'edit') {
1310: return &Apache::edit::start_table($token).
1311: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1312: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1313: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1314: &Apache::edit::insertlist($target,$token).' '
1315: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
1.37 www 1316: .'</span></td>'
1317: ."<td> "
1318: .&Apache::edit::end_row()
1319: .&Apache::edit::start_spanning_row()
1320: ."\n";
1321: } elsif ($target eq 'web') {
1.41 www 1322: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1323: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1324: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1325: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1326: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1327: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1328:
1329:
1330: # paste in the update routine to receive stuff back from the applet
1331: $result.=&update_script($internalid);
1332: # start the initscript for this applet
1333: $result.=&start_init_script($internalid);
1334: # put the axis commands inside
1335: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.45 www 1336: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
1.37 www 1337: # init script is left open
1338: }
1339: return $result;
1340: }
1341:
1.1 www 1342: 1;
1343:
1344: __END__
1345:
1346: =head1 NAME
1347:
1348: Apache::functionplotresponse.pm;
1349:
1350: =head1 SYNOPSIS
1351:
1352: Handles tags associated with accepting function plots.
1353:
1354: This is part of the LearningOnline Network with CAPA project
1355: described at http://www.lon-capa.org.
1356:
1357: =head1 HANDLER SUBROUTINE
1358:
1359: start_functionplotresponse()
1360:
1361: =head1 OTHER SUBROUTINES
1362:
1363: =over
1364:
1365: =item end_functionplotresponse()
1366:
1367: =back
1368:
1369: =cut
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