Annotation of loncom/homework/functionplotresponse.pm, revision 1.49
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.49 ! www 4: # $Id: functionplotresponse.pm,v 1.48 2010/11/24 15:30:45 www Exp $
1.1 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::functionplotresponse;
30: use strict;
31: use Apache::response();
32: use Apache::lonlocal;
33: use Apache::lonnet;
1.36 www 34:
1.1 www 35: BEGIN {
1.37 www 36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
37: 'functionplotrule','functionplotruleset',
38: 'functionplotelements'));
1.1 www 39: }
40:
1.5 www 41: #
42: # There can be a number of applets on a page, each called ggbApplet_$id,
43: # where $id is the "_"-concatenated part and responseid
44: #
45:
1.1 www 46: sub geogebra_startcode {
1.3 www 47: my ($id)=@_;
1.1 www 48: return (<<ENDSTARTCODE);
1.3 www 49: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 50: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
52: ENDSTARTCODE
53: }
54:
55: sub geogebra_endcode {
1.2 www 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
57: }
58:
1.5 www 59: #
60: # This is the internal GeoGebra bytecode which defines the spline functions
61: #
1.2 www 62: sub geogebra_spline_program {
63: return (<<ENDSPLINEPROGRAM);
1.42 www 64: <param name="ggbBase64" value="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" />
1.2 www 65: ENDSPLINEPROGRAM
66: }
67:
1.5 www 68: #
69: # The standard set of parameters inside <applet>
70: #
1.2 www 71: sub geogebra_default_parameters {
1.3 www 72: my ($id)=@_;
1.2 www 73: return(<<ENDDEFAULTPARAMETERS);
74: <param name="image" value="/adm/lonIcons/lonanim.gif" />
75: <param name="boxborder" value="false" />
76: <param name="centerimage" value="true" />
1.39 www 77: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_algos.jar, geogebra_export.jar, geogebra_javascript.jar, jlatexmath.jar, jlm_greek.jar, jlm_cyrillic.jar, geogebra_properties.jar" />
78: <param name="cache_version" value="3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0" />
1.2 www 79: <param name="framePossible" value="false" />
80:
81: <param name="showResetIcon" value="false" />
82: <param name="showAnimationButton" value="false" />
83: <param name="enableRightClick" value="false" />
84: <param name="errorDialogsActive" value="true" />
85: <param name="enableLabelDrags" value="false" />
86: <param name="showMenuBar" value="false" />
87: <param name="showToolBar" value="false" />
88: <param name="showToolBarHelp" value="false" />
89: <param name="showAlgebraInput" value="false" />
90: <param name="enableShiftDragZoom" value="false" />
91: <param name="allowRescaling" value="false" />
92: <param name="enableLabelDrags" value="false" />
1.3 www 93: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 94: ENDDEFAULTPARAMETERS
1.1 www 95: }
96:
1.5 www 97: #
98: # This subroutine is called by LON-CAPA at </problem>
99: # Each applet on the page will call function ggbOnInit when it is done loading
100: # This function in turn will call the respective function registered by start_init_script
101: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
102: #
103:
1.3 www 104: sub init_script {
1.16 www 105: if ($#Apache::functionplotresponse::callscripts>=0) {
106: my $script='';
107: foreach my $id (@Apache::functionplotresponse::callscripts) {
108: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
109: }
110: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.17 www 111: ") { setTimeout('ggbInitAll()',20) }";
1.16 www 112: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 113: return (<<ENDGGBINIT);
114: <script type="text/javascript">
115: // <![CDATA[
1.16 www 116: // Function that each applet will call when loaded
117: // It will pass "its" parameter
118: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 119: function ggbOnInit(param) {
1.16 www 120: $script
121: }
122: function ggbInitAll() {
1.17 www 123: $calls
1.3 www 124: }
125: // ]]>
126: </script>
127: ENDGGBINIT
128: }
129: }
130:
1.5 www 131: #
132: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 133: # Changes the hidden fields on the web page
1.5 www 134: #
135: sub update_script {
136: my ($id)=@_;
137: return (<<ENDUPDATESCRIPT);
138: <script type="text/javascript">
139: // <![CDATA[
140: function updatePointCoordinates_$id(coordinateName) {
141: var x = document.ggbApplet_$id.getXcoord(coordinateName);
142: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 145: }
146: // ]]>
147: </script>
148: ENDUPDATESCRIPT
149: }
150:
151: #
152: # Register the above update-handler for a variable
153: #
154:
155: sub update_register {
156: my ($id,$variable)=@_;
1.6 www 157: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
158: }
159:
160: #
1.40 www 161: # Set a point coordinate variable
1.6 www 162: #
1.40 www 163: sub set_point_coordinate {
1.48 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_$id.evalCommand("a=1");
1.40 www 187: document.ggbApplet_$id.evalCommand("$xvariable=Slider[0,$domain,$xinterval]");
188: document.ggbApplet_$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 $return;
334: }
335:
1.4 www 336: sub plot_script {
1.47 www 337: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
1.41 www 338: $label=~s/\W//g;
339: if (($label) && ($label!~/^[A-Za-z]/)) {
340: $label='C'.$label;
341: }
342: my $visible=0;
343: if ($label) {
344: $visible="1";
345: } else {
346: $Apache::functionplotresponse::counter++;
347: $label='C'.$Apache::functionplotresponse::counter;
348: }
1.46 www 349: my $rc=0;
350: my $gc=0;
351: my $bc=0;
352: if ($color) {
353: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
354: $rc=hex($rh);
355: $gc=hex($gh);
356: $bc=hex($bh);
357: }
1.6 www 358: if ($fixed) {
1.43 www 359: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
1.46 www 360: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
1.47 www 361: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
362: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
1.6 www 363: } else {
1.46 www 364: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
1.6 www 365: }
1.4 www 366: }
367:
1.5 www 368: #
1.7 www 369: # Subroutine that generates code for spline $label based on stored information
1.6 www 370: #
371:
372: sub generate_spline {
1.48 www 373: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.6 www 374: my $result='';
1.7 www 375: my $order=$Apache::functionplotresponse::splineorder{$label};
376: my $x=$Apache::functionplotresponse::splineinitx{$label};
377: my $y=$Apache::functionplotresponse::splineinity{$label};
378: my $sx=$Apache::functionplotresponse::splinescalex{$label};
379: my $sy=$Apache::functionplotresponse::splinescaley{$label};
380: my @coords=();
381: foreach my $i (1..$order) {
1.48 www 382: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
1.40 www 383: my $xp=$x;
1.8 www 384: $x+=$sx/(2.*($order-1));
1.7 www 385: push(@coords,$label.'P'.$i);
1.48 www 386: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
1.8 www 387: $x+=$sx/(2.*($order-1));
1.7 www 388: push(@coords,$label.'S'.$i);
389: }
390: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 391: return $result;
392: }
393: #
394: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 395: #
1.4 www 396: sub start_backgroundplot {
397: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
398: my $result='';
399: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
400: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.47 www 401: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
402: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
1.41 www 403: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.46 www 404: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
405: $color=~s/[^a-fA-F0-9]//gs;
406: unless (length($color)==6) { $color=''; }
1.6 www 407: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
408:
1.4 www 409: unless ($function) { $function="0"; }
410: if ($target eq 'web') {
1.41 www 411: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
1.47 www 412: unless (defined($xinitial)) { $xinitial=$xmin; }
413: unless (defined($xfinal)) { $xfinal=$xmax; }
414: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
1.13 www 415: } elsif ($target eq 'edit') {
416: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
417: &Apache::edit::text_arg('Function:','function',
418: $token,'16').
1.47 www 419: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
420: $token,'8').
421: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
422: $token,'8').
1.41 www 423: &Apache::edit::text_arg('Label on Plot:','label',
424: $token,'8').
1.46 www 425: &Apache::edit::text_arg('Color (hex code):','color',
426: $token,'8').
1.13 www 427: &Apache::edit::select_arg('Fixed location:','fixed',
428: ['yes','no'],$token).
429: &Apache::edit::end_row();
430: } elsif ($target eq 'modified') {
431: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.47 www 432: $safeeval,'function','label','xinitial','xfinal','color','fixed');
1.13 www 433: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
434: }
435: return $result;
1.4 www 436: }
437:
438: sub end_backgroundplot {
1.13 www 439: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
440: my $result='';
441: if ($target eq 'edit') {
442: $result=&Apache::edit::end_table();
443: }
444: return $result;
1.6 www 445: }
446:
447: #
1.25 www 448: # <functionplotrule ... />
1.12 www 449: #
1.25 www 450: sub start_functionplotrule {
1.12 www 451: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
452: my $result='';
1.24 www 453: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
454: $Apache::functionplotresponse::counter++;
455: if ($label=~/\W/) {
1.25 www 456: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 457: }
458: $label=~s/\W//gs;
459: unless ($label) {
460: $label='R'.$Apache::functionplotresponse::counter;
461: } else {
462: $label='R'.$label;
463: }
464: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 465: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 466: }
467:
468:
469: if ($target eq 'grade') {
470: # Simply remember - in order - for later
1.25 www 471: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
472: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 473: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 474: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 475: }
476: $beginninglabel=~s/\W//gs;
477: $endinglabel=~s/\W//gs;
478: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
479: $relationship=~s/\W//gs;
480: $relationship=lc($relationship);
481: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 482: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 483: $relationship='eq';
484: }
1.35 www 485: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 486: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 487: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 488: $derivative=0;
489: }
1.25 www 490: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 491: $label,
492: $derivative,
1.25 www 493: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 494: $beginninglabel,
1.25 www 495: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 496: $endinglabel,
1.35 www 497: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
498: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 499: $relationship,
1.33 www 500: &Apache::lonxml::get_param('value',$parstack,$safeeval),
501: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 502: )));
503: } elsif ($target eq 'edit') {
1.29 www 504: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 505: &Apache::edit::text_arg('Index/Name:','index',
506: $token,'10').' '.
1.35 www 507: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 508: [['0','Function itself'],
509: ['1','First derivative'],
1.42 www 510: ['2','Second derivative'],
511: ['-1','Integral']],$token).'<br />'.
1.44 www 512: &Apache::edit::text_arg('Initial x-value:','xinitial',
1.35 www 513: $token,'8').
1.44 www 514: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
515: [['start','Start of Plot'],
516: ['end','End of Plot']],$token,'8').'<br />'.
1.30 www 517:
1.44 www 518: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
1.35 www 519: $token,'8').
1.44 www 520: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
1.32 www 521: [['end','End of Plot']],$token,'8').'<br />'.
1.44 www 522: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
1.35 www 523: $token,'8').
1.44 www 524: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
1.35 www 525: $token,'8').'<br />'.
1.38 www 526: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 527: [['eq','equal'],
528: ['ne','not equal'],
529: ['ge','greater than or equal'],
530: ['gt','greater than'],
531: ['lt','less than'],
532: ['le','less than or equal']],$token).
533: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.35 www 534: [['undef','not defined']],$token,'8').
1.29 www 535: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 536: $token,'8').
1.29 www 537: &Apache::edit::end_row();
538: } elsif ($target eq 'modified') {
539: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 540: $safeeval,'index','derivativeorder',
541: 'xinitial','xinitiallabel','xfinal','xfinallabel',
542: 'minimumlength','maximumlength',
543: 'relationship','value','percenterror');
1.29 www 544: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 545: }
1.12 www 546: return $result;
547: }
548:
1.25 www 549: sub end_functionplotrule {
1.13 www 550: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
551: my $result='';
552: if ($target eq 'edit') {
553: $result=&Apache::edit::end_table();
554: }
555: return $result;
1.12 www 556: }
557:
558:
559: #
1.23 www 560: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 561: #
562: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
563: #
564: sub start_spline {
565: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 566: my $result='';
567: if ($target eq 'web') {
1.23 www 568: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 569: $Apache::functionplotresponse::counter++;
570: if ($label=~/\W/) {
1.23 www 571: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 572: }
573: $label=~s/\W//gs;
1.23 www 574: unless ($label) {
575: $label='S'.$Apache::functionplotresponse::counter;
576: } else {
577: $label='S'.$label;
578: }
1.13 www 579: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 580: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 581: }
582:
583: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
584: if ($order<2) { $order=2; }
585: if ($order>8) { $order=8; }
586: $Apache::functionplotresponse::splineorder{$label}=$order;
587:
588: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
589: unless ($x) { $x=0; }
590: $Apache::functionplotresponse::splineinitx{$label}=$x;
591:
592: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
593: unless ($y) { $y=0; }
594: $Apache::functionplotresponse::splineinity{$label}=$y;
595:
596: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
597: unless ($sx) { $sx=$order; }
598: $Apache::functionplotresponse::splinescalex{$label}=$sx;
599:
600: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
601: unless ($sy) { $sy=2; }
602: $Apache::functionplotresponse::splinescaley{$label}=$sy;
603: } elsif ($target eq 'edit') {
604: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 605: &Apache::edit::text_arg('Index:','index',
1.14 www 606: $token,'4').' '.
1.13 www 607: &Apache::edit::select_arg('Order:','order',
1.44 www 608: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 609: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 610: $token,'4').' '.
1.13 www 611: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 612: $token,'4').' '.
1.13 www 613: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 614: $token,'4').' '.
1.13 www 615: &Apache::edit::text_arg('Scale y:','scaley',
616: $token,'4').
617: &Apache::edit::end_row();
618: } elsif ($target eq 'modified') {
619: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 620: $safeeval,'index','order','initx','inity',
1.13 www 621: 'scalex','scaley');
622: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
623: }
624: return $result;
1.6 www 625: }
626:
627: sub end_spline {
1.13 www 628: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
629: my $result='';
630: if ($target eq 'edit') {
631: $result=&Apache::edit::end_table();
632: }
633: return $result;
1.4 www 634: }
635:
1.3 www 636: sub end_init_script {
637: return (<<ENDENDINIT);
638: }
639: // ]]>
640: </script>
641: ENDENDINIT
642: }
643:
1.10 www 644: #
645: # Storing and restoring spline coordinates from part answers
646: #
647: sub decode_previous_answer {
648: my ($answer)=@_;
649: foreach my $coordinate (split(/\,/,$answer)) {
650: my ($key,$value)=split(/\=/,$coordinate);
651: $Apache::functionplotresponse::previous{$key}=$value;
652: }
653: }
654:
655: sub get_answer_from_form_fields {
656: my ($id)=@_;
657: my $answer='';
658: my %coords=();
659: foreach my $field (keys(%env)) {
660: if ($field=~/^form\.HWVAL\_$id/) {
661: $field=~/^form\.(.*)$/;
662: $coords{$1}=$env{$field};
663: }
664: }
665: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
666: return ($answer,%coords);
667: }
668:
1.15 www 669: #
670: # The following functions calculate the cubic-hermite splines server-side
671: #
672:
673: sub cubic_hermite {
674: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 675: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
676: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 677: }
678:
679: #
680: # d/dt(...)
681: #
682:
683: sub ddt_cubic_hermite {
684: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 685: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
686: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 687: }
688:
689: #
690: # d^2/dt^2(...)
691: #
692:
693: sub d2dt2_cubic_hermite {
694: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 695: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
696: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 697: }
698:
699: #
1.18 www 700: # Array index calculation
701: #
702: sub array_index {
703: my ($xmin,$xmax,$x)=@_;
1.38 www 704: if ($x ne '') {
705: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
706: } else {
707: return undef;
708: }
1.20 www 709: }
710:
711: #
1.18 www 712: # Populate the arrays
713: #
714:
715: sub populate_arrays {
716: my ($id,$xmin,$xmax)=@_;
1.26 www 717: for (my $i=0; $i<=400; $i++) {
1.35 www 718: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 719: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 720: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 721: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 722: }
1.19 www 723: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 724: # Run over all splines in response
725: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 726: my $xiold=-1;
1.18 www 727: # Run over all points in spline
1.19 www 728: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 729: my $ni=$i+1;
730: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
731: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
732: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
733: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
734: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
735: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
736: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
737: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
738: # Run in small steps over spline parameter
1.26 www 739: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 740: my $xreal=&cubic_hermite($t,@xparms);
741: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 742: if ($xi<$xiold) { return 'no_func'; }
1.26 www 743: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.19 www 744: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
1.18 www 745: $xiold=$xi;
1.35 www 746: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 747: # Function value
1.30 www 748: my $funcval=&cubic_hermite($t,@yparms);
749: $Apache::functionplotresponse::func[$xi]=$funcval;
750: if (defined($funcval)) {
751: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
752: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
753: }
754: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
755: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
756: }
757: }
1.28 www 758: # Chain rule
1.22 www 759: # dy/dx=dy/dt/(dx/dt)
760: my $dxdt=&ddt_cubic_hermite($t,@xparms);
761: if ($dxdt) {
762: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 763: # Second derivative
1.28 www 764: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 765: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
766: ($dxdt*$dxdt*$dxdt);
1.22 www 767: }
1.18 www 768: }
769: }
770: }
771: }
772: }
773:
774: #
1.37 www 775: # Implementation of <functionplotresponse>
1.15 www 776: #
777:
1.1 www 778: sub start_functionplotresponse {
779: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
780: my $result='';
1.6 www 781: # To remember the splines - somehow, they need to come last
782: undef %Apache::functionplotresponse::splineorder;
783: undef %Apache::functionplotresponse::splineinitx;
784: undef %Apache::functionplotresponse::splineinity;
785: undef %Apache::functionplotresponse::splinescalex;
786: undef %Apache::functionplotresponse::splinescaley;
1.10 www 787: # Remember input fields, etc
788: undef %Apache::functionplotresponse::previous;
1.9 www 789: $Apache::functionplotresponse::inputfields='';
1.6 www 790: $Apache::functionplotresponse::counter=0;
1.24 www 791: # Remember rules
1.25 www 792: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 793: # Remember failed rules
794: if ($target eq 'grade') {
795: undef @Apache::functionplotresponse::failedrules;
796: }
797: # Delete previous awards
798: undef $Apache::functionplotresponse::awarddetail;
1.10 www 799: # Part and ID
800: my $partid=$Apache::inputtags::part;
801: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 802: # Internal ID to mark the applet and its coordinates
1.10 www 803: my $internalid = $partid.'_'.$id;
804: # Previous answer
805: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
806:
1.6 www 807: # Parameters of <functionplotresponse>
1.41 www 808: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 809: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
810: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
811: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 812: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
813: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 814: if ($target eq 'edit') {
815: $result.=&Apache::edit::start_table($token)
816: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
817: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 818: .&Apache::edit::deletelist($target,$token).' '
819: .&Apache::edit::insertlist($target,$token)
1.12 www 820: .'</span></td>'
821: ."<td> "
822: .&Apache::edit::end_row()
823: .&Apache::edit::start_spanning_row()
824: ."\n";
1.14 www 825: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
826: $token,'6').' '.
827: &Apache::edit::text_arg('Minimum x-value:','xmin',
828: $token,'4').' '.
1.12 www 829: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 830: $token,'4').' '.
1.12 www 831: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 832: ['yes','no'],$token).'<br />'.
1.14 www 833: &Apache::edit::text_arg('Label y-axis:','ylabel',
834: $token,'6').' '.
1.12 www 835: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 836: $token,'4').' '.
1.12 www 837: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 838: $token,'4').' '.
1.12 www 839: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 840: ['yes','no'],$token).'<br />'.
1.12 www 841: &Apache::edit::select_arg('Grid visible:','gridvisible',
1.47 www 842: ['yes','no'],$token).'<br />'.
843: &Apache::edit::text_arg('Background plot(s) for answer (function:xmin:xmax,function:xmin:xmax,...):',
844: 'answerdisplay',$token,'50');
845:
1.12 www 846: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
847: } elsif ($target eq 'modified') {
848: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 849: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.47 www 850: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1.12 www 851: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 852:
1.12 www 853: } elsif ($target eq 'meta') {
1.10 www 854: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 855: } elsif (($target eq 'answer') &&
856: ($env{'form.answer_output_mode'} ne 'tex') &&
857: ($Apache::lonhomework::viewgrades == 'F')) {
858: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
859: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
860: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
861: {'only_body' => 1,
862: 'bgcolor' => '#FFFFFF',
863: 'js_ready' => 1,});
864: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
865: $uname =~s/\W//g;
866: $udom =~s/\W//g;
867: my $function_name =
868: join('_','LONCAPA_scriptvars',$uname,$udom,
869: $env{'form.counter'},$Apache::lonxml::curdepth);
870: my $rules_var ="<script type=\"text/javascript\">
871: // <![CDATA[
872: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
873: $Apache::functionplotresponse::ruleslog.
874: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
875: // ]]>
876: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
877: &Apache::lonxml::add_script_result($rules_var);
878: }
879:
1.1 www 880: return $result;
881: }
882:
1.25 www 883: sub compare_rel {
1.26 www 884: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 885: # is the real value undefined?
1.26 www 886: unless (defined($realval)) {
1.36 www 887: # the real value is not defined
1.26 www 888: if ($relationship eq 'eq') {
889: if ($value eq 'undef') {
890: return 1;
891: } else {
892: return 0;
893: }
894: } elsif ($relationship eq 'ne') {
895: if ($value eq 'undef') {
896: return 0;
897: } else {
898: return 1;
899: }
900: } else {
901: return 0;
902: }
903: }
904:
1.36 www 905: # is the expected value undefined?
906: if ($value eq 'undef') {
907: # but by now we know that the real value is defined
908: return 0;
909: }
910:
911: # both are defined.
1.26 www 912: if ($relationship eq 'gt') {
913: return ($realval>$value);
914: } elsif ($relationship eq 'ge') {
915: return ($realval>$value-$tol);
916: } elsif ($relationship eq 'lt') {
917: return ($realval<$value);
918: } elsif ($relationship eq 'le') {
919: return ($realval<$value+$tol);
920: } elsif ($relationship eq 'ne') {
921: return (abs($value-$realval)>$tol);
922: } else {
923: return (abs($value-$realval)<$tol);
924: }
1.25 www 925: return 0;
926: }
927:
1.35 www 928: sub addlog {
929: my ($text)=@_;
930: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
931: }
932:
933: sub actualval {
934: my ($i,$xmin,$xmax)=@_;
935: return $xmin+$i/400.*($xmax-$xmin);
936: }
937:
1.25 www 938: sub functionplotrulecheck {
1.33 www 939: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
940:
1.35 www 941: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 942: =split(/\:/,$rule);
1.33 www 943: $percent=($percent>0?$percent:5);
1.35 www 944: &addlog("=================");
1.42 www 945: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.49 ! www 946: if ((defined($minimumlength)) || (defined($maximumlength))) {
! 947: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
! 948: }
1.30 www 949: my $li=0;
950: my $lh=400;
951:
1.31 www 952: # Special case: the upper boundary was not defined
953: # and needs to be set to the value where
954: # the condition is not true anymore => set flag
955:
956: my $findupper=0;
957: if (($xfinal eq '')
958: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
959: && ($xfinallabel)) {
960: $findupper=1;
961: }
962:
1.25 www 963: # if a hard value is set for the boundaries, it overrides the label
1.30 www 964: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
965: $li=&array_index($xmin,$xmax,$xinitial);
966: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
967: }
968: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
969: $lh=&array_index($xmin,$xmax,$xfinal);
970: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 971: }
1.31 www 972: # if the label is defined, use it
1.25 www 973: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 974: &addlog("Using lower label $xinitiallabel");
1.30 www 975: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
976: } else {
977: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 978: }
1.31 www 979: unless ($findupper) {
980: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 981: &addlog("Using upper label $xfinallabel");
1.33 www 982: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 983: } else {
984: $lh=&array_index($xmin,$xmax,$xfinal);
985: }
1.25 www 986: }
987: # Basic sanity checks
1.30 www 988: if ($li<0) { $li=0; }
989: if ($lh>400) { $lh=400; }
1.38 www 990: if (($li>$lh) || (!defined($lh))) {
1.30 www 991: $lh=$li;
1.25 www 992: }
1.31 www 993:
1.35 www 994: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
995: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
996: if ($findupper) {
997: &addlog("Looking for label $xfinallabel");
998: }
1.33 www 999: my $tol=$percent*($ymax-$ymin)/100;
1000: if ($xmax>$xmin) {
1001: if ($derivative==2) {
1002: $tol=4.*$tol/($xmax-$xmin);
1003: } elsif ($derivative==1) {
1004: $tol=2.*$tol/($xmax-$xmin);
1.42 www 1005: } elsif ($derivative==-1) {
1006: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 1007: }
1.27 www 1008: }
1.42 www 1009: my $integral=0;
1010: my $binwidth=($xmax-$xmin)/400.;
1011: if (($derivative<0) && (!$findupper)) {
1012: # definite integral, calculate over whole length
1013: &addlog("Calculating definite integral");
1014: for (my $i=$li; $i<=$lh; $i++) {
1015: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1016: }
1017: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1018: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1019: &addlog("Rule $label failed.");
1020: my $hintlabel=$label;
1021: $hintlabel=~s/^R//;
1022: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1023: &addlog("Set hint condition $hintlabel");
1024: return 0;
1025: }
1026: } else {
1027: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 1028: my $val;
1029: if ($derivative==2) {
1.27 www 1030: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 1031: } elsif ($derivative==1) {
1.27 www 1032: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 1033: } elsif ($derivative==-1) {
1034: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1035: $val=$integral;
1.25 www 1036: } else {
1.27 www 1037: $val=$Apache::functionplotresponse::func[$i];
1.25 www 1038: }
1.31 www 1039: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 1040: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 1041: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 1042: if (($findupper) && ($i>$li)) {
1.49 ! www 1043: # Check lengths
! 1044: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
! 1045: # Successfully found a new label, set it
1.31 www 1046: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1047: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1048: return 1;
1049: } else {
1.35 www 1050: &addlog("Rule $label failed.");
1.49 ! www 1051: &setfailed($label);
1.31 www 1052: return 0;
1053: }
1054: }
1.42 www 1055: }
1.25 www 1056: }
1.49 ! www 1057: # Corner case where this makes sense: using start or stop as defined labels
! 1058: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1.35 www 1059: &addlog("Rule $label passed.");
1.27 www 1060: return 1;
1.24 www 1061: }
1062:
1.49 ! www 1063: #
! 1064: # check for minimum and maximum lengths
! 1065: #
! 1066:
! 1067: sub checklength {
! 1068: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
! 1069: unless (($minimumlength) || ($maximumlength)) { return 1; }
! 1070: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
! 1071: if ($minimumlength) {
! 1072: if ($length<$minimumlength) {
! 1073: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
! 1074: &setfailed($label);
! 1075: return 0;
! 1076: }
! 1077: }
! 1078: if ($maximumlength) {
! 1079: if ($length>$maximumlength) {
! 1080: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
! 1081: &setfailed($label);
! 1082: return 0;
! 1083: }
! 1084: }
! 1085: return 1;
! 1086: }
! 1087:
! 1088: sub setfailed {
! 1089: my ($label)=@_;
! 1090: my $hintlabel=$label;
! 1091: $hintlabel=~s/^R//;
! 1092: push(@Apache::functionplotresponse::failedrules,$hintlabel);
! 1093: &addlog("Set hint condition $hintlabel");
! 1094: }
! 1095:
1.37 www 1096: sub start_functionplotruleset {
1097: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1098: if ($target eq 'edit') {
1099: return &Apache::edit::start_table($token).
1100: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1101: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1102: .&Apache::edit::deletelist($target,$token).' '.
1103: &Apache::edit::insertlist($target,$token)
1104: .'</span></td>'
1105: ."<td> "
1106: .&Apache::edit::end_row()
1107: .&Apache::edit::start_spanning_row()
1108: ."\n";
1109: }
1110: }
1.3 www 1111:
1.37 www 1112: sub end_functionplotruleset {
1113: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1114: my $id=$Apache::inputtags::response[-1];
1115: my $partid=$Apache::inputtags::part;
1116: my $internalid = $partid.'_'.$id;
1117:
1118: if ($target eq 'edit' ) {
1119: return &Apache::edit::end_table();
1120: } elsif ($target eq 'grade'
1.10 www 1121: && &Apache::response::submitted()
1122: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1123: #
1124: # Actually grade
1125: #
1.41 www 1126: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1127:
1.24 www 1128: my $ad='';
1.30 www 1129: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1130: $Apache::functionplotresponse::ruleslog='';
1.30 www 1131: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1132: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.18 www 1133: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
1.21 www 1134: $ad='NOT_FUNCTION';
1.18 www 1135: } else {
1.35 www 1136: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1137: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1138: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1139: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1140:
1.24 www 1141: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1142: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.33 www 1143: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
1.24 www 1144: $ad='INCORRECT';
1145: last;
1146: }
1147: }
1148: # If it's not wrong, it's correct
1149: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1150: }
1.37 www 1151: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1152: &addlog("Assigned award detail: $ad");
1153: # Store for later to be assigned at end_functionplotresponse
1154: $Apache::functionplotresponse::awarddetail=$ad;
1155: }
1156: }
1157:
1158:
1159: sub end_functionplotresponse {
1160: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1161: &Apache::response::end_response;
1162:
1163: my $result;
1164: my $id=$Apache::inputtags::response[-1];
1165: my $partid=$Apache::inputtags::part;
1166: my $internalid = $partid.'_'.$id;
1.20 www 1167:
1.37 www 1168: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1169: if ($target eq 'grade'
1170: && &Apache::response::submitted()
1171: && $Apache::lonhomework::type eq 'exam') {
1172:
1173: &Apache::response::scored_response($partid,$id);
1174:
1175: } elsif ($target eq 'grade'
1176: && &Apache::response::submitted()
1177: && $Apache::lonhomework::type ne 'exam') {
1178: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1179: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1180: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1181: #
1182: # Assign grade
1183: #
1184: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1185: #
1186: # Store grading info
1187: #
1188: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1189: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1190: } elsif ($target eq 'web') {
1.37 www 1191: undef @Apache::functionplotresponse::failedrules;
1192: }
1193: return $result;
1194: }
1195:
1196: sub end_functionplotelements {
1197: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1198: my $result='';
1199: my $id=$Apache::inputtags::response[-1];
1200: my $partid=$Apache::inputtags::part;
1201: my $internalid = $partid.'_'.$id;
1202: if ($target eq 'edit' ) {
1203: $result=&Apache::edit::end_table();
1204: } elsif ($target eq 'web') {
1.47 www 1205: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1206:
1207: # Are we in show answer mode?
1208: my $showanswer=&Apache::response::show_answer();
1209: if ($showanswer) {
1210: # Render answerdisplay
1211: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1212: if ($answerdisplay=~/\S/s) {
1213: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1214: my ($func,$xl,$xh)=split(/\s*\:\s*/,$plot);
1215: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1216: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1217: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1218: }
1219: }
1220: }
1.48 www 1221: my $fixed=0;
1222: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1.6 www 1223: # Now is the time to render all of the stored splines
1224: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.48 www 1225: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1.6 www 1226: }
1.5 www 1227: # close the init script
1.3 www 1228: $result.=&end_init_script();
1.17 www 1229: # register all splines in this response
1230: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1231: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1232: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1233: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1234: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1235: }
1.9 www 1236: # generate the input fields
1237: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1238: # actually start the <applet>-tag
1.3 www 1239: $result.=&geogebra_startcode($internalid);
1.5 www 1240: # load the spline bytecode
1.3 www 1241: $result.=&geogebra_spline_program();
1.5 www 1242: # set default parameters
1.3 www 1243: $result.=&geogebra_default_parameters($internalid);
1.5 www 1244: # close the <applet>-tag
1.1 www 1245: $result.=&geogebra_endcode();
1246: }
1247: return $result;
1248: }
1249:
1.41 www 1250: sub boundaries {
1251: my ($parstack,$safeeval,$level)=@_;
1252: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1253: $xmin=(defined($xmin)?$xmin:-10);
1254: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1255: $xmax=(defined($xmax)?$xmax:10);
1256: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1257: $ymin=(defined($ymin)?$ymin:-10);
1258: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1259: $ymax=(defined($ymax)?$ymax:10);
1260: if ($xmax<=$xmin) {
1261: $xmax=$xmin+20;
1262: }
1263: if ($ymax<=$ymin) {
1264: $ymax=$ymin+20;
1265: }
1266: return ($xmin,$xmax,$ymin,$ymax);
1267: }
1268:
1.37 www 1269: sub start_functionplotelements {
1270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1271: my $result='';
1272: my $id=$Apache::inputtags::response[-1];
1273: my $partid=$Apache::inputtags::part;
1274: my $internalid = $partid.'_'.$id;
1275:
1276: if ($target eq 'edit') {
1277: return &Apache::edit::start_table($token).
1278: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1279: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1280: .&Apache::edit::deletelist($target,$token).' '.
1281: &Apache::edit::insertlist($target,$token)
1282: .'</span></td>'
1283: ."<td> "
1284: .&Apache::edit::end_row()
1285: .&Apache::edit::start_spanning_row()
1286: ."\n";
1287: } elsif ($target eq 'web') {
1.41 www 1288: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1289: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1290: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1291: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1292: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1293: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1294:
1295:
1296: # paste in the update routine to receive stuff back from the applet
1297: $result.=&update_script($internalid);
1298: # start the initscript for this applet
1299: $result.=&start_init_script($internalid);
1300: # put the axis commands inside
1301: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.45 www 1302: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
1.37 www 1303: # init script is left open
1304: }
1305: return $result;
1306: }
1307:
1.1 www 1308: 1;
1309:
1310: __END__
1311:
1312: =head1 NAME
1313:
1314: Apache::functionplotresponse.pm;
1315:
1316: =head1 SYNOPSIS
1317:
1318: Handles tags associated with accepting function plots.
1319:
1320: This is part of the LearningOnline Network with CAPA project
1321: described at http://www.lon-capa.org.
1322:
1323: =head1 HANDLER SUBROUTINE
1324:
1325: start_functionplotresponse()
1326:
1327: =head1 OTHER SUBROUTINES
1328:
1329: =over
1330:
1331: =item end_functionplotresponse()
1332:
1333: =back
1334:
1335: =cut
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