Annotation of loncom/homework/functionplotresponse.pm, revision 1.67
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.67 ! www 4: # $Id: functionplotresponse.pm,v 1.66 2011/10/14 00:40:24 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;
1.65 www 34: use Apache::run;
1.36 www 35:
1.1 www 36: BEGIN {
1.37 www 37: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
38: 'functionplotrule','functionplotruleset',
39: 'functionplotelements'));
1.1 www 40: }
41:
1.5 www 42: #
43: # There can be a number of applets on a page, each called ggbApplet_$id,
44: # where $id is the "_"-concatenated part and responseid
45: #
46:
1.1 www 47: sub geogebra_startcode {
1.3 www 48: my ($id)=@_;
1.1 www 49: return (<<ENDSTARTCODE);
1.3 www 50: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 51: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 52: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
53: ENDSTARTCODE
54: }
55:
56: sub geogebra_endcode {
1.2 www 57: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
58: }
59:
1.5 www 60: #
61: # This is the internal GeoGebra bytecode which defines the spline functions
62: #
1.2 www 63: sub geogebra_spline_program {
64: return (<<ENDSPLINEPROGRAM);
1.57 www 65: <param name="ggbBase64" value="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"/>
1.2 www 66: ENDSPLINEPROGRAM
67: }
68:
1.5 www 69: #
70: # The standard set of parameters inside <applet>
71: #
1.2 www 72: sub geogebra_default_parameters {
1.3 www 73: my ($id)=@_;
1.2 www 74: return(<<ENDDEFAULTPARAMETERS);
75: <param name="image" value="/adm/lonIcons/lonanim.gif" />
76: <param name="boxborder" value="false" />
77: <param name="centerimage" value="true" />
1.62 www 78: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_algos.jar, geogebra_javascript.jar, geogebra_properties.jar, jlatexmath.jar, jlm_cyrillic.jar, jlm_greek.jar" />
79: <param name="cache_version" value="3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0" />
1.2 www 80: <param name="framePossible" value="false" />
81:
82: <param name="showResetIcon" value="false" />
83: <param name="showAnimationButton" value="false" />
84: <param name="enableRightClick" value="false" />
85: <param name="errorDialogsActive" value="true" />
86: <param name="enableLabelDrags" value="false" />
87: <param name="showMenuBar" value="false" />
88: <param name="showToolBar" value="false" />
89: <param name="showToolBarHelp" value="false" />
90: <param name="showAlgebraInput" value="false" />
91: <param name="enableShiftDragZoom" value="false" />
92: <param name="allowRescaling" value="false" />
93: <param name="enableLabelDrags" value="false" />
1.3 www 94: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 95: ENDDEFAULTPARAMETERS
1.1 www 96: }
97:
1.5 www 98: #
99: # This subroutine is called by LON-CAPA at </problem>
100: # Each applet on the page will call function ggbOnInit when it is done loading
101: # This function in turn will call the respective function registered by start_init_script
102: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
103: #
104:
1.3 www 105: sub init_script {
1.16 www 106: if ($#Apache::functionplotresponse::callscripts>=0) {
107: my $script='';
108: foreach my $id (@Apache::functionplotresponse::callscripts) {
109: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
110: }
111: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.52 www 112: ") { setTimeout('ggbInitAll()',200) }";
1.16 www 113: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 114: return (<<ENDGGBINIT);
115: <script type="text/javascript">
116: // <![CDATA[
1.16 www 117: // Function that each applet will call when loaded
118: // It will pass "its" parameter
119: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 120: function ggbOnInit(param) {
1.16 www 121: $script
122: }
123: function ggbInitAll() {
1.17 www 124: $calls
1.3 www 125: }
126: // ]]>
127: </script>
128: ENDGGBINIT
129: }
130: }
131:
1.5 www 132: #
133: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 134: # Changes the hidden fields on the web page
1.5 www 135: #
136: sub update_script {
137: my ($id)=@_;
138: return (<<ENDUPDATESCRIPT);
139: <script type="text/javascript">
140: // <![CDATA[
141: function updatePointCoordinates_$id(coordinateName) {
142: var x = document.ggbApplet_$id.getXcoord(coordinateName);
143: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
145: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 146: }
147: // ]]>
148: </script>
149: ENDUPDATESCRIPT
150: }
151:
152: #
153: # Register the above update-handler for a variable
154: #
155:
156: sub update_register {
157: my ($id,$variable)=@_;
1.6 www 158: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
159: }
160:
161: #
1.40 www 162: # Set a point coordinate variable
1.6 www 163: #
1.40 www 164: sub set_point_coordinate {
1.48 www 165: my ($id,$variable,$x,$y,$fixed)=@_;
166: my $mult=($fixed?'a*':'');
1.6 www 167: return (<<ENDSETVARIABLE);
1.48 www 168: document.ggbApplet_$id.evalCommand("a=1");
169: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
1.40 www 170: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 171: ENDSETVARIABLE
172: }
173:
174: #
1.40 www 175: # Set a slope coordinate variable
176: #
177: sub set_slope_coordinate {
1.48 www 178: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
1.40 www 179: my $xvariable=$variable.'x';
180: my $yvariable=$variable.'y';
181: my $domain=$xmax-$xmin;
182: my $range=$ymax-$ymin;
183: my $xinterval=$domain/100.;
184: my $yinterval=$range/200.;
1.48 www 185: my $mult=($fixed?'a*':'');
1.40 www 186: return (<<ENDSETSVARIABLE);
1.48 www 187: document.ggbApplet_$id.evalCommand("a=1");
1.51 www 188: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
1.40 www 189: document.ggbApplet_$id.setVisible("$xvariable", false);
190: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
191: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
192: document.ggbApplet_$id.setVisible("$yvariable", false);
193: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
1.48 www 194: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
1.40 www 195: document.ggbApplet_$id.setLabelVisible("$variable", false);
196: ENDSETSVARIABLE
197: }
198:
199: #
1.9 www 200: # Input field name for a coordinate variable
201: #
202:
203: sub field_name {
204: my ($id,$variable,$name)=@_;
205: return "HWVAL_$id\_$variable\_$name";
206: }
207:
208: #
209: # Generate an input field for a coordinate variable
210: #
211:
212: sub generate_input_field {
213: my ($id,$variable,$x,$y)=@_;
214: $Apache::functionplotresponse::inputfields.=
215: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
216: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
217: }
218:
219: #
1.40 www 220: # Initialize a new point coordinate variable at set a listener on it
1.6 www 221: #
1.40 www 222: sub new_point_coordinate {
1.48 www 223: my ($id,$variable,$x,$y,$fixed)=@_;
1.11 www 224: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 225: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
226: }
1.11 www 227: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 228: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
229: }
1.9 www 230: &generate_input_field($id,$variable,$x,$y);
1.48 www 231: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
1.40 www 232: }
233:
234: #
235: # Initialize a new slope coordinate variable at set a listener on it
236: #
237: sub new_slope_coordinate {
1.48 www 238: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.40 www 239: #
240: # $variable: name of the slope point
241: # $x, $y: coordinates of the slope point
242: # $pointname: name of the associated point point
243: # $xp $yp: coordinates of the point point
244: #
245: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
246: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
247: }
248: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
249: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
250: }
251: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
252: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
253: }
254: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
255: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
256: }
257:
258: &generate_input_field($id,$variable,$x,$y);
259: my $xrel=$x-$xp;
260: my $yrel=$y-$yp;
1.48 www 261: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
1.5 www 262: }
263:
264: #
265: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
266: # It then starts the right headers
267: #
1.3 www 268: sub start_init_script {
269: my ($id)=@_;
1.16 www 270: # Add id to the list of ggbInit_$id functions that need to be called
271: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 272: # ... and open this function
1.3 www 273: return (<<ENDSTARTINIT);
274: <script type="text/javascript">
275: // <![CDATA[
1.5 www 276: // variable that will eventually be passed back to the server
277: var coordinateMap_$id = [];
1.16 www 278: // flag for not loaded yet
279: var loaded_$id=false;
1.5 www 280: // Init-function for applet
1.3 www 281: function ggbInit_$id() {
282: ENDSTARTINIT
283: }
284:
1.5 www 285: #
286: # This sets the axes inside ggbInit_$id
287: #
288:
1.4 www 289: sub axes_script {
290: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
291: return (<<ENDAXESSCRIPT);
292: // changes (xmin, xmax, ymin, ymax)
293: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
294:
295: // makes the (x,y) axis (in)visible
296: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
297: // makes the grid (in)visible
298: document.ggbApplet_$id.setGridVisible($gvisible);
299: ENDAXESSCRIPT
300: }
301:
1.14 www 302: sub axes_label {
1.45 www 303: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
1.14 www 304: unless ($xlabel || $ylabel) { return ''; }
305: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
306: if ($xlabel) {
1.45 www 307: if (($ymin<0) && ($ymax>0)) {
1.14 www 308: $return.=(<<ENDXAXISLABELSCRIPT);
309: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
310: document.ggbApplet_$id.setVisible("Xlabel",false);
311: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
312: ENDXAXISLABELSCRIPT
1.45 www 313: } else {
314: $return.=(<<ENDXOFFAXISLABEL);
315: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
316: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
317: ENDXOFFAXISLABEL
318: }
1.14 www 319: }
320: if ($ylabel) {
1.45 www 321: if (($xmin<0) && ($xmax>0)) {
1.14 www 322: $return.=(<<ENDYAXISLABELSCRIPT);
323: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
324: document.ggbApplet_$id.setVisible("Ylabel",false);
325: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
326: ENDYAXISLABELSCRIPT
1.45 www 327: } else {
328: $return.=(<<ENDYOFFAXISLABEL);
329: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
330: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
331: ENDYOFFAXISLABEL
332: }
1.14 www 333: }
334: return $return;
335: }
336:
1.58 www 337: #
338: # Subroutine to produce background and answer plots
339: #
340:
1.4 www 341: sub plot_script {
1.47 www 342: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
1.41 www 343: $label=~s/\W//g;
344: if (($label) && ($label!~/^[A-Za-z]/)) {
345: $label='C'.$label;
346: }
347: my $visible=0;
348: if ($label) {
349: $visible="1";
350: } else {
351: $Apache::functionplotresponse::counter++;
352: $label='C'.$Apache::functionplotresponse::counter;
353: }
1.46 www 354: my $rc=0;
355: my $gc=0;
356: my $bc=0;
357: if ($color) {
358: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
359: $rc=hex($rh);
360: $gc=hex($gh);
361: $bc=hex($bh);
362: }
1.6 www 363: if ($fixed) {
1.43 www 364: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
1.46 www 365: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
1.47 www 366: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
367: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
1.6 www 368: } else {
1.46 www 369: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
1.6 www 370: }
1.4 www 371: }
372:
1.5 www 373: #
1.58 www 374: # Answer spline display
375: #
376: # points: x,y,slope_x,slope_y
377:
378: sub answer_spline_script {
379: my ($id,@points)=@_;
380: my $order=int(($#points+1)/4);
381: if ($order<2) { $order=2; }
382: if ($order>8) { $order=8; }
383: $Apache::functionplotresponse::counter++;
1.60 www 384: my $label='CSpline'.$Apache::functionplotresponse::counter;
1.59 www 385: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'[';
386: for (my $i=0;$i<=$#points;$i+=4) {
387: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),";
388: }
389: $output=~s/\,$//;
390: $output.=']");'."\n";
391: for (my $i=2; $i<2*$order; $i+=2) {
1.61 www 392: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n";
1.59 www 393: }
1.60 www 394: for (my $i=1; $i<2*$order; $i+=2) {
1.61 www 395: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n";
1.60 www 396: }
397:
1.59 www 398: return $output;
1.58 www 399: }
400:
401: #
1.7 www 402: # Subroutine that generates code for spline $label based on stored information
1.6 www 403: #
404:
405: sub generate_spline {
1.48 www 406: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.6 www 407: my $result='';
1.7 www 408: my $order=$Apache::functionplotresponse::splineorder{$label};
409: my $x=$Apache::functionplotresponse::splineinitx{$label};
410: my $y=$Apache::functionplotresponse::splineinity{$label};
411: my $sx=$Apache::functionplotresponse::splinescalex{$label};
412: my $sy=$Apache::functionplotresponse::splinescaley{$label};
413: my @coords=();
414: foreach my $i (1..$order) {
1.48 www 415: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
1.40 www 416: my $xp=$x;
1.8 www 417: $x+=$sx/(2.*($order-1));
1.7 www 418: push(@coords,$label.'P'.$i);
1.48 www 419: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
1.8 www 420: $x+=$sx/(2.*($order-1));
1.7 www 421: push(@coords,$label.'S'.$i);
422: }
423: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 424: return $result;
425: }
426: #
427: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 428: #
1.4 www 429: sub start_backgroundplot {
430: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
431: my $result='';
432: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
433: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.47 www 434: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
435: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
1.41 www 436: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.46 www 437: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
438: $color=~s/[^a-fA-F0-9]//gs;
439: unless (length($color)==6) { $color=''; }
1.6 www 440: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
441:
1.4 www 442: unless ($function) { $function="0"; }
443: if ($target eq 'web') {
1.41 www 444: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
1.47 www 445: unless (defined($xinitial)) { $xinitial=$xmin; }
446: unless (defined($xfinal)) { $xfinal=$xmax; }
447: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
1.13 www 448: } elsif ($target eq 'edit') {
449: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
450: &Apache::edit::text_arg('Function:','function',
451: $token,'16').
1.47 www 452: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
453: $token,'8').
454: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
455: $token,'8').
1.41 www 456: &Apache::edit::text_arg('Label on Plot:','label',
457: $token,'8').
1.46 www 458: &Apache::edit::text_arg('Color (hex code):','color',
459: $token,'8').
1.13 www 460: &Apache::edit::select_arg('Fixed location:','fixed',
461: ['yes','no'],$token).
462: &Apache::edit::end_row();
463: } elsif ($target eq 'modified') {
464: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.47 www 465: $safeeval,'function','label','xinitial','xfinal','color','fixed');
1.13 www 466: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
467: }
468: return $result;
1.4 www 469: }
470:
471: sub end_backgroundplot {
1.13 www 472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
473: my $result='';
474: if ($target eq 'edit') {
475: $result=&Apache::edit::end_table();
476: }
477: return $result;
1.6 www 478: }
479:
480: #
1.25 www 481: # <functionplotrule ... />
1.12 www 482: #
1.25 www 483: sub start_functionplotrule {
1.12 www 484: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
485: my $result='';
1.24 www 486: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
487: $Apache::functionplotresponse::counter++;
488: if ($label=~/\W/) {
1.25 www 489: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 490: }
491: $label=~s/\W//gs;
492: unless ($label) {
493: $label='R'.$Apache::functionplotresponse::counter;
494: } else {
495: $label='R'.$label;
496: }
497: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 498: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 499: }
500:
501:
502: if ($target eq 'grade') {
503: # Simply remember - in order - for later
1.25 www 504: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
505: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 506: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 507: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 508: }
509: $beginninglabel=~s/\W//gs;
510: $endinglabel=~s/\W//gs;
511: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
512: $relationship=~s/\W//gs;
513: $relationship=lc($relationship);
514: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 515: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 516: $relationship='eq';
517: }
1.35 www 518: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 519: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 520: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 521: $derivative=0;
522: }
1.25 www 523: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 524: $label,
525: $derivative,
1.25 www 526: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 527: $beginninglabel,
1.25 www 528: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 529: $endinglabel,
1.35 www 530: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
531: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 532: $relationship,
1.33 www 533: &Apache::lonxml::get_param('value',$parstack,$safeeval),
534: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 535: )));
536: } elsif ($target eq 'edit') {
1.29 www 537: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 538: &Apache::edit::text_arg('Index/Name:','index',
539: $token,'10').' '.
1.35 www 540: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 541: [['0','Function itself'],
542: ['1','First derivative'],
1.42 www 543: ['2','Second derivative'],
544: ['-1','Integral']],$token).'<br />'.
1.44 www 545: &Apache::edit::text_arg('Initial x-value:','xinitial',
1.35 www 546: $token,'8').
1.44 www 547: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
548: [['start','Start of Plot'],
549: ['end','End of Plot']],$token,'8').'<br />'.
1.30 www 550:
1.44 www 551: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
1.35 www 552: $token,'8').
1.44 www 553: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
1.32 www 554: [['end','End of Plot']],$token,'8').'<br />'.
1.44 www 555: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
1.35 www 556: $token,'8').
1.44 www 557: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
1.35 www 558: $token,'8').'<br />'.
1.38 www 559: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 560: [['eq','equal'],
561: ['ne','not equal'],
562: ['ge','greater than or equal'],
563: ['gt','greater than'],
564: ['lt','less than'],
565: ['le','less than or equal']],$token).
566: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.65 www 567: [['undef','not defined']],$token,'30').
1.29 www 568: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 569: $token,'8').
1.29 www 570: &Apache::edit::end_row();
571: } elsif ($target eq 'modified') {
1.54 www 572: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
1.53 www 573: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
574: }
1.54 www 575: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
1.53 www 576: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
577: }
1.29 www 578: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 579: $safeeval,'index','derivativeorder',
580: 'xinitial','xinitiallabel','xfinal','xfinallabel',
581: 'minimumlength','maximumlength',
582: 'relationship','value','percenterror');
1.29 www 583: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 584: }
1.12 www 585: return $result;
586: }
587:
1.25 www 588: sub end_functionplotrule {
1.13 www 589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
590: my $result='';
591: if ($target eq 'edit') {
592: $result=&Apache::edit::end_table();
593: }
594: return $result;
1.12 www 595: }
596:
597:
598: #
1.23 www 599: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 600: #
601: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
602: #
603: sub start_spline {
604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 605: my $result='';
606: if ($target eq 'web') {
1.23 www 607: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 608: $Apache::functionplotresponse::counter++;
609: if ($label=~/\W/) {
1.23 www 610: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 611: }
612: $label=~s/\W//gs;
1.23 www 613: unless ($label) {
614: $label='S'.$Apache::functionplotresponse::counter;
615: } else {
616: $label='S'.$label;
617: }
1.13 www 618: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 619: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 620: }
621:
622: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
623: if ($order<2) { $order=2; }
624: if ($order>8) { $order=8; }
625: $Apache::functionplotresponse::splineorder{$label}=$order;
626:
627: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
628: unless ($x) { $x=0; }
629: $Apache::functionplotresponse::splineinitx{$label}=$x;
630:
631: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
632: unless ($y) { $y=0; }
633: $Apache::functionplotresponse::splineinity{$label}=$y;
634:
635: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
636: unless ($sx) { $sx=$order; }
637: $Apache::functionplotresponse::splinescalex{$label}=$sx;
638:
639: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
640: unless ($sy) { $sy=2; }
641: $Apache::functionplotresponse::splinescaley{$label}=$sy;
642: } elsif ($target eq 'edit') {
643: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 644: &Apache::edit::text_arg('Index:','index',
1.14 www 645: $token,'4').' '.
1.13 www 646: &Apache::edit::select_arg('Order:','order',
1.44 www 647: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 648: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 649: $token,'4').' '.
1.13 www 650: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 651: $token,'4').' '.
1.13 www 652: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 653: $token,'4').' '.
1.13 www 654: &Apache::edit::text_arg('Scale y:','scaley',
655: $token,'4').
656: &Apache::edit::end_row();
657: } elsif ($target eq 'modified') {
658: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 659: $safeeval,'index','order','initx','inity',
1.13 www 660: 'scalex','scaley');
661: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
662: }
663: return $result;
1.6 www 664: }
665:
666: sub end_spline {
1.13 www 667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
668: my $result='';
669: if ($target eq 'edit') {
670: $result=&Apache::edit::end_table();
671: }
672: return $result;
1.4 www 673: }
674:
1.3 www 675: sub end_init_script {
676: return (<<ENDENDINIT);
677: }
678: // ]]>
679: </script>
680: ENDENDINIT
681: }
682:
1.10 www 683: #
684: # Storing and restoring spline coordinates from part answers
685: #
686: sub decode_previous_answer {
687: my ($answer)=@_;
688: foreach my $coordinate (split(/\,/,$answer)) {
689: my ($key,$value)=split(/\=/,$coordinate);
690: $Apache::functionplotresponse::previous{$key}=$value;
691: }
692: }
693:
694: sub get_answer_from_form_fields {
695: my ($id)=@_;
696: my $answer='';
697: my %coords=();
698: foreach my $field (keys(%env)) {
699: if ($field=~/^form\.HWVAL\_$id/) {
700: $field=~/^form\.(.*)$/;
701: $coords{$1}=$env{$field};
702: }
703: }
704: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
705: return ($answer,%coords);
706: }
707:
1.15 www 708: #
709: # The following functions calculate the cubic-hermite splines server-side
710: #
711:
712: sub cubic_hermite {
713: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 714: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
715: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 716: }
717:
718: #
719: # d/dt(...)
720: #
721:
722: sub ddt_cubic_hermite {
723: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 724: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
725: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 726: }
727:
728: #
729: # d^2/dt^2(...)
730: #
731:
732: sub d2dt2_cubic_hermite {
733: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 734: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
735: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 736: }
737:
738: #
1.18 www 739: # Array index calculation
740: #
741: sub array_index {
742: my ($xmin,$xmax,$x)=@_;
1.38 www 743: if ($x ne '') {
744: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
745: } else {
746: return undef;
747: }
1.20 www 748: }
749:
750: #
1.18 www 751: # Populate the arrays
752: #
753:
754: sub populate_arrays {
1.64 www 755: my ($id,$xmin,$xmax,$ymin,$ymax)=@_;
1.26 www 756: for (my $i=0; $i<=400; $i++) {
1.35 www 757: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 758: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 759: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 760: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 761: }
1.19 www 762: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 763: # Run over all splines in response
764: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 765: my $xiold=-1;
1.18 www 766: # Run over all points in spline
1.19 www 767: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 768: my $ni=$i+1;
769: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
770: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
771: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
772: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
773: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
774: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
775: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
776: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
777: # Run in small steps over spline parameter
1.26 www 778: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 779: my $xreal=&cubic_hermite($t,@xparms);
780: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 781: if ($xi<$xiold) { return 'no_func'; }
1.26 www 782: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.18 www 783: $xiold=$xi;
1.35 www 784: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 785: # Function value
1.30 www 786: my $funcval=&cubic_hermite($t,@yparms);
1.64 www 787:
788: # Do we already have a value for this point, and is it different from the new one?
789: if ((defined($Apache::functionplotresponse::func[$xi])) &&
790: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) {
791: return 'no_func';
792: }
793: # Okay, remember the new point
1.30 www 794: $Apache::functionplotresponse::func[$xi]=$funcval;
1.64 www 795:
1.30 www 796: if (defined($funcval)) {
797: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
798: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
799: }
800: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
801: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
802: }
803: }
1.28 www 804: # Chain rule
1.22 www 805: # dy/dx=dy/dt/(dx/dt)
806: my $dxdt=&ddt_cubic_hermite($t,@xparms);
807: if ($dxdt) {
808: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 809: # Second derivative
1.28 www 810: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 811: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
812: ($dxdt*$dxdt*$dxdt);
1.22 www 813: }
1.18 www 814: }
815: }
816: }
817: }
818: }
819:
820: #
1.37 www 821: # Implementation of <functionplotresponse>
1.15 www 822: #
823:
1.1 www 824: sub start_functionplotresponse {
825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
826: my $result='';
1.6 www 827: # To remember the splines - somehow, they need to come last
828: undef %Apache::functionplotresponse::splineorder;
829: undef %Apache::functionplotresponse::splineinitx;
830: undef %Apache::functionplotresponse::splineinity;
831: undef %Apache::functionplotresponse::splinescalex;
832: undef %Apache::functionplotresponse::splinescaley;
1.10 www 833: # Remember input fields, etc
834: undef %Apache::functionplotresponse::previous;
1.9 www 835: $Apache::functionplotresponse::inputfields='';
1.6 www 836: $Apache::functionplotresponse::counter=0;
1.24 www 837: # Remember rules
1.25 www 838: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 839: # Remember failed rules
840: if ($target eq 'grade') {
841: undef @Apache::functionplotresponse::failedrules;
842: }
843: # Delete previous awards
844: undef $Apache::functionplotresponse::awarddetail;
1.10 www 845: # Part and ID
846: my $partid=$Apache::inputtags::part;
847: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 848: # Internal ID to mark the applet and its coordinates
1.10 www 849: my $internalid = $partid.'_'.$id;
850: # Previous answer
851: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
852:
1.6 www 853: # Parameters of <functionplotresponse>
1.41 www 854: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 855: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
856: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
857: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 858: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
859: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 860: if ($target eq 'edit') {
861: $result.=&Apache::edit::start_table($token)
862: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
863: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 864: .&Apache::edit::deletelist($target,$token).' '
1.50 www 865: .&Apache::edit::insertlist($target,$token).' '
866: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1.12 www 867: .'</span></td>'
868: ."<td> "
869: .&Apache::edit::end_row()
870: .&Apache::edit::start_spanning_row()
871: ."\n";
1.14 www 872: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
873: $token,'6').' '.
874: &Apache::edit::text_arg('Minimum x-value:','xmin',
875: $token,'4').' '.
1.12 www 876: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 877: $token,'4').' '.
1.12 www 878: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 879: ['yes','no'],$token).'<br />'.
1.14 www 880: &Apache::edit::text_arg('Label y-axis:','ylabel',
881: $token,'6').' '.
1.12 www 882: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 883: $token,'4').' '.
1.12 www 884: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 885: $token,'4').' '.
1.12 www 886: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 887: ['yes','no'],$token).'<br />'.
1.12 www 888: &Apache::edit::select_arg('Grid visible:','gridvisible',
1.47 www 889: ['yes','no'],$token).'<br />'.
1.58 www 890: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1.63 raeburn 891: 'answerdisplay',$token,'50').
1.12 www 892: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
893: } elsif ($target eq 'modified') {
894: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 895: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.47 www 896: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1.12 www 897: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 898:
1.12 www 899: } elsif ($target eq 'meta') {
1.10 www 900: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 901: } elsif (($target eq 'answer') &&
902: ($env{'form.answer_output_mode'} ne 'tex') &&
903: ($Apache::lonhomework::viewgrades == 'F')) {
904: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
905: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
906: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
907: {'only_body' => 1,
908: 'bgcolor' => '#FFFFFF',
909: 'js_ready' => 1,});
910: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
911: $uname =~s/\W//g;
912: $udom =~s/\W//g;
913: my $function_name =
914: join('_','LONCAPA_scriptvars',$uname,$udom,
915: $env{'form.counter'},$Apache::lonxml::curdepth);
916: my $rules_var ="<script type=\"text/javascript\">
917: // <![CDATA[
918: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
919: $Apache::functionplotresponse::ruleslog.
920: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
921: // ]]>
922: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
923: &Apache::lonxml::add_script_result($rules_var);
924: }
925:
1.1 www 926: return $result;
927: }
928:
1.25 www 929: sub compare_rel {
1.26 www 930: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 931: # is the real value undefined?
1.26 www 932: unless (defined($realval)) {
1.36 www 933: # the real value is not defined
1.26 www 934: if ($relationship eq 'eq') {
935: if ($value eq 'undef') {
936: return 1;
937: } else {
938: return 0;
939: }
940: } elsif ($relationship eq 'ne') {
941: if ($value eq 'undef') {
942: return 0;
943: } else {
944: return 1;
945: }
946: } else {
947: return 0;
948: }
949: }
950:
1.36 www 951: # is the expected value undefined?
952: if ($value eq 'undef') {
953: # but by now we know that the real value is defined
954: return 0;
955: }
956:
957: # both are defined.
1.26 www 958: if ($relationship eq 'gt') {
959: return ($realval>$value);
960: } elsif ($relationship eq 'ge') {
961: return ($realval>$value-$tol);
962: } elsif ($relationship eq 'lt') {
963: return ($realval<$value);
964: } elsif ($relationship eq 'le') {
965: return ($realval<$value+$tol);
966: } elsif ($relationship eq 'ne') {
967: return (abs($value-$realval)>$tol);
968: } else {
969: return (abs($value-$realval)<$tol);
970: }
1.25 www 971: return 0;
972: }
973:
1.35 www 974: sub addlog {
975: my ($text)=@_;
1.67 ! www 976: $text=~s/\'/\\\'/g;
1.35 www 977: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
978: }
979:
980: sub actualval {
981: my ($i,$xmin,$xmax)=@_;
982: return $xmin+$i/400.*($xmax-$xmin);
983: }
1.65 www 984:
1.66 www 985: sub fpr_val {
986: my ($arg)=@_;
987: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg},
988: $Apache::functionplotresponse::fpr_xmin,
989: $Apache::functionplotresponse::fpr_xmax);
990: }
991:
1.65 www 992: sub fpr_f {
993: my ($arg)=@_;
994: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin,
995: $Apache::functionplotresponse::fpr_xmax,
996: $arg)];
997: }
998:
999: sub fpr_dfdx {
1000: my ($arg)=@_;
1001: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin,
1002: $Apache::functionplotresponse::fpr_xmax,
1003: $arg)];
1004: }
1005:
1006: sub fpr_d2fdx2 {
1007: my ($arg)=@_;
1008: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin,
1009: $Apache::functionplotresponse::fpr_xmax,
1010: $arg)];
1011: }
1.35 www 1012:
1.25 www 1013: sub functionplotrulecheck {
1.65 www 1014: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1.33 www 1015:
1.35 www 1016: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 1017: =split(/\:/,$rule);
1.33 www 1018: $percent=($percent>0?$percent:5);
1.35 www 1019: &addlog("=================");
1.42 www 1020: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.65 www 1021: #
1022: # Evaluate the value
1023: #
1024: if ($value=~/\D/) {
1025: $Apache::functionplotresponse::fpr_xmin=$xmin;
1026: $Apache::functionplotresponse::fpr_xmax=$xmax;
1027: $value=&Apache::run::run($value,$safeeval);
1028: &addlog("Value evaluated to $value");
1029: }
1030:
1031: #
1032: # Minimum and maximum lengths of the interval
1033: #
1.49 www 1034: if ((defined($minimumlength)) || (defined($maximumlength))) {
1035: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
1036: }
1.30 www 1037: my $li=0;
1038: my $lh=400;
1039:
1.31 www 1040: # Special case: the upper boundary was not defined
1041: # and needs to be set to the value where
1042: # the condition is not true anymore => set flag
1043:
1044: my $findupper=0;
1045: if (($xfinal eq '')
1046: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
1047: && ($xfinallabel)) {
1048: $findupper=1;
1049: }
1050:
1.25 www 1051: # if a hard value is set for the boundaries, it overrides the label
1.30 www 1052: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
1053: $li=&array_index($xmin,$xmax,$xinitial);
1054: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
1055: }
1056: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
1057: $lh=&array_index($xmin,$xmax,$xfinal);
1058: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 1059: }
1.31 www 1060: # if the label is defined, use it
1.25 www 1061: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 1062: &addlog("Using lower label $xinitiallabel");
1.30 www 1063: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1064: } else {
1065: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 1066: }
1.31 www 1067: unless ($findupper) {
1068: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 1069: &addlog("Using upper label $xfinallabel");
1.33 www 1070: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 1071: } else {
1072: $lh=&array_index($xmin,$xmax,$xfinal);
1073: }
1.25 www 1074: }
1075: # Basic sanity checks
1.30 www 1076: if ($li<0) { $li=0; }
1077: if ($lh>400) { $lh=400; }
1.38 www 1078: if (($li>$lh) || (!defined($lh))) {
1.30 www 1079: $lh=$li;
1.25 www 1080: }
1.31 www 1081:
1.35 www 1082: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1083: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1084: if ($findupper) {
1085: &addlog("Looking for label $xfinallabel");
1086: }
1.33 www 1087: my $tol=$percent*($ymax-$ymin)/100;
1088: if ($xmax>$xmin) {
1089: if ($derivative==2) {
1090: $tol=4.*$tol/($xmax-$xmin);
1091: } elsif ($derivative==1) {
1092: $tol=2.*$tol/($xmax-$xmin);
1.42 www 1093: } elsif ($derivative==-1) {
1094: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 1095: }
1.27 www 1096: }
1.42 www 1097: my $integral=0;
1098: my $binwidth=($xmax-$xmin)/400.;
1099: if (($derivative<0) && (!$findupper)) {
1100: # definite integral, calculate over whole length
1101: &addlog("Calculating definite integral");
1102: for (my $i=$li; $i<=$lh; $i++) {
1103: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1104: }
1105: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1106: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1107: &addlog("Rule $label failed.");
1108: my $hintlabel=$label;
1109: $hintlabel=~s/^R//;
1110: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1111: &addlog("Set hint condition $hintlabel");
1112: return 0;
1113: }
1114: } else {
1115: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 1116: my $val;
1117: if ($derivative==2) {
1.27 www 1118: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 1119: } elsif ($derivative==1) {
1.27 www 1120: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 1121: } elsif ($derivative==-1) {
1122: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1123: $val=$integral;
1.25 www 1124: } else {
1.27 www 1125: $val=$Apache::functionplotresponse::func[$i];
1.25 www 1126: }
1.31 www 1127: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 1128: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 1129: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 1130: if (($findupper) && ($i>$li)) {
1.49 www 1131: # Check lengths
1132: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1133: # Successfully found a new label, set it
1.31 www 1134: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1135: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1136: return 1;
1137: } else {
1.35 www 1138: &addlog("Rule $label failed.");
1.49 www 1139: &setfailed($label);
1.31 www 1140: return 0;
1141: }
1142: }
1.42 www 1143: }
1.25 www 1144: }
1.49 www 1145: # Corner case where this makes sense: using start or stop as defined labels
1146: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1.35 www 1147: &addlog("Rule $label passed.");
1.27 www 1148: return 1;
1.24 www 1149: }
1150:
1.49 www 1151: #
1152: # check for minimum and maximum lengths
1153: #
1154:
1155: sub checklength {
1156: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1157: unless (($minimumlength) || ($maximumlength)) { return 1; }
1158: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1159: if ($minimumlength) {
1160: if ($length<$minimumlength) {
1161: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1162: &setfailed($label);
1163: return 0;
1164: }
1165: }
1166: if ($maximumlength) {
1167: if ($length>$maximumlength) {
1168: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1169: &setfailed($label);
1170: return 0;
1171: }
1172: }
1173: return 1;
1174: }
1175:
1176: sub setfailed {
1177: my ($label)=@_;
1178: my $hintlabel=$label;
1179: $hintlabel=~s/^R//;
1180: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1181: &addlog("Set hint condition $hintlabel");
1182: }
1183:
1.37 www 1184: sub start_functionplotruleset {
1185: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1186: if ($target eq 'edit') {
1187: return &Apache::edit::start_table($token).
1188: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1189: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1190: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1191: &Apache::edit::insertlist($target,$token).' '
1192: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1.37 www 1193: .'</span></td>'
1194: ."<td> "
1195: .&Apache::edit::end_row()
1196: .&Apache::edit::start_spanning_row()
1197: ."\n";
1198: }
1199: }
1.3 www 1200:
1.37 www 1201: sub end_functionplotruleset {
1202: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1203: my $id=$Apache::inputtags::response[-1];
1204: my $partid=$Apache::inputtags::part;
1205: my $internalid = $partid.'_'.$id;
1206:
1207: if ($target eq 'edit' ) {
1208: return &Apache::edit::end_table();
1209: } elsif ($target eq 'grade'
1.10 www 1210: && &Apache::response::submitted()
1211: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1212: #
1213: # Actually grade
1214: #
1.41 www 1215: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1216:
1.24 www 1217: my $ad='';
1.30 www 1218: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1219: $Apache::functionplotresponse::ruleslog='';
1.30 www 1220: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1221: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.64 www 1222: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') {
1.21 www 1223: $ad='NOT_FUNCTION';
1.18 www 1224: } else {
1.35 www 1225: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1226: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1227: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1228: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1229:
1.24 www 1230: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1231: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.65 www 1232: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1.24 www 1233: $ad='INCORRECT';
1234: last;
1235: }
1236: }
1237: # If it's not wrong, it's correct
1238: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1239: }
1.37 www 1240: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1241: &addlog("Assigned award detail: $ad");
1242: # Store for later to be assigned at end_functionplotresponse
1243: $Apache::functionplotresponse::awarddetail=$ad;
1244: }
1245: }
1246:
1247:
1248: sub end_functionplotresponse {
1249: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1250: &Apache::response::end_response;
1251:
1252: my $result;
1253: my $id=$Apache::inputtags::response[-1];
1254: my $partid=$Apache::inputtags::part;
1255: my $internalid = $partid.'_'.$id;
1.20 www 1256:
1.37 www 1257: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1258: if ($target eq 'grade'
1259: && &Apache::response::submitted()
1260: && $Apache::lonhomework::type eq 'exam') {
1261:
1262: &Apache::response::scored_response($partid,$id);
1263:
1264: } elsif ($target eq 'grade'
1265: && &Apache::response::submitted()
1266: && $Apache::lonhomework::type ne 'exam') {
1267: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1268: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1269: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1270: #
1271: # Assign grade
1272: #
1273: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1274: #
1275: # Store grading info
1276: #
1277: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1278: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1279: } elsif ($target eq 'web') {
1.37 www 1280: undef @Apache::functionplotresponse::failedrules;
1281: }
1282: return $result;
1283: }
1284:
1285: sub end_functionplotelements {
1286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1287: my $result='';
1288: my $id=$Apache::inputtags::response[-1];
1289: my $partid=$Apache::inputtags::part;
1290: my $internalid = $partid.'_'.$id;
1291: if ($target eq 'edit' ) {
1292: $result=&Apache::edit::end_table();
1293: } elsif ($target eq 'web') {
1.47 www 1294: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1295:
1296: # Are we in show answer mode?
1297: my $showanswer=&Apache::response::show_answer();
1298: if ($showanswer) {
1299: # Render answerdisplay
1300: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1301: if ($answerdisplay=~/\S/s) {
1302: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1.58 www 1303: my @components=split(/\s*\:\s*/,$plot);
1304: if ($#components<3) {
1305: # Just a simple plot
1306: my ($func,$xl,$xh)=@components;
1307: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1308: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1309: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1310: } else {
1311: # This is a spline
1.59 www 1312: $result.=&answer_spline_script($internalid,@components);
1.58 www 1313: }
1.47 www 1314: }
1315: }
1316: }
1.48 www 1317: my $fixed=0;
1318: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1.6 www 1319: # Now is the time to render all of the stored splines
1320: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.48 www 1321: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1.6 www 1322: }
1.5 www 1323: # close the init script
1.3 www 1324: $result.=&end_init_script();
1.17 www 1325: # register all splines in this response
1326: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1327: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1328: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1329: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1330: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1331: }
1.9 www 1332: # generate the input fields
1333: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1334: # actually start the <applet>-tag
1.3 www 1335: $result.=&geogebra_startcode($internalid);
1.5 www 1336: # load the spline bytecode
1.3 www 1337: $result.=&geogebra_spline_program();
1.5 www 1338: # set default parameters
1.3 www 1339: $result.=&geogebra_default_parameters($internalid);
1.5 www 1340: # close the <applet>-tag
1.1 www 1341: $result.=&geogebra_endcode();
1342: }
1343: return $result;
1344: }
1345:
1.41 www 1346: sub boundaries {
1347: my ($parstack,$safeeval,$level)=@_;
1348: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1349: $xmin=(defined($xmin)?$xmin:-10);
1350: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1351: $xmax=(defined($xmax)?$xmax:10);
1352: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1353: $ymin=(defined($ymin)?$ymin:-10);
1354: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1355: $ymax=(defined($ymax)?$ymax:10);
1356: if ($xmax<=$xmin) {
1357: $xmax=$xmin+20;
1358: }
1359: if ($ymax<=$ymin) {
1360: $ymax=$ymin+20;
1361: }
1362: return ($xmin,$xmax,$ymin,$ymax);
1363: }
1364:
1.37 www 1365: sub start_functionplotelements {
1366: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1367: my $result='';
1368: my $id=$Apache::inputtags::response[-1];
1369: my $partid=$Apache::inputtags::part;
1370: my $internalid = $partid.'_'.$id;
1371:
1372: if ($target eq 'edit') {
1373: return &Apache::edit::start_table($token).
1374: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1375: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1376: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1377: &Apache::edit::insertlist($target,$token).' '
1378: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
1.37 www 1379: .'</span></td>'
1380: ."<td> "
1381: .&Apache::edit::end_row()
1382: .&Apache::edit::start_spanning_row()
1383: ."\n";
1384: } elsif ($target eq 'web') {
1.41 www 1385: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1386: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1387: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1388: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1389: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1390: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1391:
1392:
1393: # paste in the update routine to receive stuff back from the applet
1394: $result.=&update_script($internalid);
1395: # start the initscript for this applet
1396: $result.=&start_init_script($internalid);
1397: # put the axis commands inside
1398: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.45 www 1399: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
1.37 www 1400: # init script is left open
1401: }
1402: return $result;
1403: }
1404:
1.1 www 1405: 1;
1406:
1407: __END__
1408:
1409: =head1 NAME
1410:
1411: Apache::functionplotresponse.pm;
1412:
1413: =head1 SYNOPSIS
1414:
1415: Handles tags associated with accepting function plots.
1416:
1417: This is part of the LearningOnline Network with CAPA project
1418: described at http://www.lon-capa.org.
1419:
1420: =head1 HANDLER SUBROUTINE
1421:
1422: start_functionplotresponse()
1423:
1424: =head1 OTHER SUBROUTINES
1425:
1426: =over
1427:
1428: =item end_functionplotresponse()
1429:
1430: =back
1431:
1432: =cut
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