Annotation of loncom/homework/functionplotresponse.pm, revision 1.64
1.1 www 1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
1.64 ! www 4: # $Id: functionplotresponse.pm,v 1.63 2011/05/27 23:00:58 raeburn Exp $
1.1 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::functionplotresponse;
30: use strict;
31: use Apache::response();
32: use Apache::lonlocal;
33: use Apache::lonnet;
1.36 www 34:
1.1 www 35: BEGIN {
1.37 www 36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
37: 'functionplotrule','functionplotruleset',
38: 'functionplotelements'));
1.1 www 39: }
40:
1.5 www 41: #
42: # There can be a number of applets on a page, each called ggbApplet_$id,
43: # where $id is the "_"-concatenated part and responseid
44: #
45:
1.1 www 46: sub geogebra_startcode {
1.3 www 47: my ($id)=@_;
1.1 www 48: return (<<ENDSTARTCODE);
1.3 www 49: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 50: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
52: ENDSTARTCODE
53: }
54:
55: sub geogebra_endcode {
1.2 www 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
57: }
58:
1.5 www 59: #
60: # This is the internal GeoGebra bytecode which defines the spline functions
61: #
1.2 www 62: sub geogebra_spline_program {
63: return (<<ENDSPLINEPROGRAM);
1.57 www 64: <param name="ggbBase64" value="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"/>
1.2 www 65: ENDSPLINEPROGRAM
66: }
67:
1.5 www 68: #
69: # The standard set of parameters inside <applet>
70: #
1.2 www 71: sub geogebra_default_parameters {
1.3 www 72: my ($id)=@_;
1.2 www 73: return(<<ENDDEFAULTPARAMETERS);
74: <param name="image" value="/adm/lonIcons/lonanim.gif" />
75: <param name="boxborder" value="false" />
76: <param name="centerimage" value="true" />
1.62 www 77: <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" />
78: <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 79: <param name="framePossible" value="false" />
80:
81: <param name="showResetIcon" value="false" />
82: <param name="showAnimationButton" value="false" />
83: <param name="enableRightClick" value="false" />
84: <param name="errorDialogsActive" value="true" />
85: <param name="enableLabelDrags" value="false" />
86: <param name="showMenuBar" value="false" />
87: <param name="showToolBar" value="false" />
88: <param name="showToolBarHelp" value="false" />
89: <param name="showAlgebraInput" value="false" />
90: <param name="enableShiftDragZoom" value="false" />
91: <param name="allowRescaling" value="false" />
92: <param name="enableLabelDrags" value="false" />
1.3 www 93: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 94: ENDDEFAULTPARAMETERS
1.1 www 95: }
96:
1.5 www 97: #
98: # This subroutine is called by LON-CAPA at </problem>
99: # Each applet on the page will call function ggbOnInit when it is done loading
100: # This function in turn will call the respective function registered by start_init_script
101: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
102: #
103:
1.3 www 104: sub init_script {
1.16 www 105: if ($#Apache::functionplotresponse::callscripts>=0) {
106: my $script='';
107: foreach my $id (@Apache::functionplotresponse::callscripts) {
108: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
109: }
110: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.52 www 111: ") { setTimeout('ggbInitAll()',200) }";
1.16 www 112: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 113: return (<<ENDGGBINIT);
114: <script type="text/javascript">
115: // <![CDATA[
1.16 www 116: // Function that each applet will call when loaded
117: // It will pass "its" parameter
118: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 119: function ggbOnInit(param) {
1.16 www 120: $script
121: }
122: function ggbInitAll() {
1.17 www 123: $calls
1.3 www 124: }
125: // ]]>
126: </script>
127: ENDGGBINIT
128: }
129: }
130:
1.5 www 131: #
132: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 133: # Changes the hidden fields on the web page
1.5 www 134: #
135: sub update_script {
136: my ($id)=@_;
137: return (<<ENDUPDATESCRIPT);
138: <script type="text/javascript">
139: // <![CDATA[
140: function updatePointCoordinates_$id(coordinateName) {
141: var x = document.ggbApplet_$id.getXcoord(coordinateName);
142: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 145: }
146: // ]]>
147: </script>
148: ENDUPDATESCRIPT
149: }
150:
151: #
152: # Register the above update-handler for a variable
153: #
154:
155: sub update_register {
156: my ($id,$variable)=@_;
1.6 www 157: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
158: }
159:
160: #
1.40 www 161: # Set a point coordinate variable
1.6 www 162: #
1.40 www 163: sub set_point_coordinate {
1.48 www 164: my ($id,$variable,$x,$y,$fixed)=@_;
165: my $mult=($fixed?'a*':'');
1.6 www 166: return (<<ENDSETVARIABLE);
1.48 www 167: document.ggbApplet_$id.evalCommand("a=1");
168: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
1.40 www 169: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 170: ENDSETVARIABLE
171: }
172:
173: #
1.40 www 174: # Set a slope coordinate variable
175: #
176: sub set_slope_coordinate {
1.48 www 177: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
1.40 www 178: my $xvariable=$variable.'x';
179: my $yvariable=$variable.'y';
180: my $domain=$xmax-$xmin;
181: my $range=$ymax-$ymin;
182: my $xinterval=$domain/100.;
183: my $yinterval=$range/200.;
1.48 www 184: my $mult=($fixed?'a*':'');
1.40 www 185: return (<<ENDSETSVARIABLE);
1.48 www 186: document.ggbApplet_$id.evalCommand("a=1");
1.51 www 187: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
1.40 www 188: document.ggbApplet_$id.setVisible("$xvariable", false);
189: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
190: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
191: document.ggbApplet_$id.setVisible("$yvariable", false);
192: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
1.48 www 193: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
1.40 www 194: document.ggbApplet_$id.setLabelVisible("$variable", false);
195: ENDSETSVARIABLE
196: }
197:
198: #
1.9 www 199: # Input field name for a coordinate variable
200: #
201:
202: sub field_name {
203: my ($id,$variable,$name)=@_;
204: return "HWVAL_$id\_$variable\_$name";
205: }
206:
207: #
208: # Generate an input field for a coordinate variable
209: #
210:
211: sub generate_input_field {
212: my ($id,$variable,$x,$y)=@_;
213: $Apache::functionplotresponse::inputfields.=
214: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
215: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
216: }
217:
218: #
1.40 www 219: # Initialize a new point coordinate variable at set a listener on it
1.6 www 220: #
1.40 www 221: sub new_point_coordinate {
1.48 www 222: my ($id,$variable,$x,$y,$fixed)=@_;
1.11 www 223: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 224: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
225: }
1.11 www 226: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 227: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
228: }
1.9 www 229: &generate_input_field($id,$variable,$x,$y);
1.48 www 230: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
1.40 www 231: }
232:
233: #
234: # Initialize a new slope coordinate variable at set a listener on it
235: #
236: sub new_slope_coordinate {
1.48 www 237: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.40 www 238: #
239: # $variable: name of the slope point
240: # $x, $y: coordinates of the slope point
241: # $pointname: name of the associated point point
242: # $xp $yp: coordinates of the point point
243: #
244: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
245: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
246: }
247: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
248: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
249: }
250: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
251: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
252: }
253: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
254: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
255: }
256:
257: &generate_input_field($id,$variable,$x,$y);
258: my $xrel=$x-$xp;
259: my $yrel=$y-$yp;
1.48 www 260: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
1.5 www 261: }
262:
263: #
264: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
265: # It then starts the right headers
266: #
1.3 www 267: sub start_init_script {
268: my ($id)=@_;
1.16 www 269: # Add id to the list of ggbInit_$id functions that need to be called
270: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 271: # ... and open this function
1.3 www 272: return (<<ENDSTARTINIT);
273: <script type="text/javascript">
274: // <![CDATA[
1.5 www 275: // variable that will eventually be passed back to the server
276: var coordinateMap_$id = [];
1.16 www 277: // flag for not loaded yet
278: var loaded_$id=false;
1.5 www 279: // Init-function for applet
1.3 www 280: function ggbInit_$id() {
281: ENDSTARTINIT
282: }
283:
1.5 www 284: #
285: # This sets the axes inside ggbInit_$id
286: #
287:
1.4 www 288: sub axes_script {
289: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
290: return (<<ENDAXESSCRIPT);
291: // changes (xmin, xmax, ymin, ymax)
292: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
293:
294: // makes the (x,y) axis (in)visible
295: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
296: // makes the grid (in)visible
297: document.ggbApplet_$id.setGridVisible($gvisible);
298: ENDAXESSCRIPT
299: }
300:
1.14 www 301: sub axes_label {
1.45 www 302: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
1.14 www 303: unless ($xlabel || $ylabel) { return ''; }
304: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
305: if ($xlabel) {
1.45 www 306: if (($ymin<0) && ($ymax>0)) {
1.14 www 307: $return.=(<<ENDXAXISLABELSCRIPT);
308: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
309: document.ggbApplet_$id.setVisible("Xlabel",false);
310: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
311: ENDXAXISLABELSCRIPT
1.45 www 312: } else {
313: $return.=(<<ENDXOFFAXISLABEL);
314: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
315: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
316: ENDXOFFAXISLABEL
317: }
1.14 www 318: }
319: if ($ylabel) {
1.45 www 320: if (($xmin<0) && ($xmax>0)) {
1.14 www 321: $return.=(<<ENDYAXISLABELSCRIPT);
322: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
323: document.ggbApplet_$id.setVisible("Ylabel",false);
324: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
325: ENDYAXISLABELSCRIPT
1.45 www 326: } else {
327: $return.=(<<ENDYOFFAXISLABEL);
328: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
329: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
330: ENDYOFFAXISLABEL
331: }
1.14 www 332: }
333: return $return;
334: }
335:
1.58 www 336: #
337: # Subroutine to produce background and answer plots
338: #
339:
1.4 www 340: sub plot_script {
1.47 www 341: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
1.41 www 342: $label=~s/\W//g;
343: if (($label) && ($label!~/^[A-Za-z]/)) {
344: $label='C'.$label;
345: }
346: my $visible=0;
347: if ($label) {
348: $visible="1";
349: } else {
350: $Apache::functionplotresponse::counter++;
351: $label='C'.$Apache::functionplotresponse::counter;
352: }
1.46 www 353: my $rc=0;
354: my $gc=0;
355: my $bc=0;
356: if ($color) {
357: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
358: $rc=hex($rh);
359: $gc=hex($gh);
360: $bc=hex($bh);
361: }
1.6 www 362: if ($fixed) {
1.43 www 363: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
1.46 www 364: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
1.47 www 365: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
366: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
1.6 www 367: } else {
1.46 www 368: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
1.6 www 369: }
1.4 www 370: }
371:
1.5 www 372: #
1.58 www 373: # Answer spline display
374: #
375: # points: x,y,slope_x,slope_y
376:
377: sub answer_spline_script {
378: my ($id,@points)=@_;
379: my $order=int(($#points+1)/4);
380: if ($order<2) { $order=2; }
381: if ($order>8) { $order=8; }
382: $Apache::functionplotresponse::counter++;
1.60 www 383: my $label='CSpline'.$Apache::functionplotresponse::counter;
1.59 www 384: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'[';
385: for (my $i=0;$i<=$#points;$i+=4) {
386: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),";
387: }
388: $output=~s/\,$//;
389: $output.=']");'."\n";
390: for (my $i=2; $i<2*$order; $i+=2) {
1.61 www 391: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n";
1.59 www 392: }
1.60 www 393: for (my $i=1; $i<2*$order; $i+=2) {
1.61 www 394: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n";
1.60 www 395: }
396:
1.59 www 397: return $output;
1.58 www 398: }
399:
400: #
1.7 www 401: # Subroutine that generates code for spline $label based on stored information
1.6 www 402: #
403:
404: sub generate_spline {
1.48 www 405: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.6 www 406: my $result='';
1.7 www 407: my $order=$Apache::functionplotresponse::splineorder{$label};
408: my $x=$Apache::functionplotresponse::splineinitx{$label};
409: my $y=$Apache::functionplotresponse::splineinity{$label};
410: my $sx=$Apache::functionplotresponse::splinescalex{$label};
411: my $sy=$Apache::functionplotresponse::splinescaley{$label};
412: my @coords=();
413: foreach my $i (1..$order) {
1.48 www 414: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
1.40 www 415: my $xp=$x;
1.8 www 416: $x+=$sx/(2.*($order-1));
1.7 www 417: push(@coords,$label.'P'.$i);
1.48 www 418: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
1.8 www 419: $x+=$sx/(2.*($order-1));
1.7 www 420: push(@coords,$label.'S'.$i);
421: }
422: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 423: return $result;
424: }
425: #
426: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 427: #
1.4 www 428: sub start_backgroundplot {
429: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
430: my $result='';
431: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
432: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.47 www 433: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
434: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
1.41 www 435: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.46 www 436: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
437: $color=~s/[^a-fA-F0-9]//gs;
438: unless (length($color)==6) { $color=''; }
1.6 www 439: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
440:
1.4 www 441: unless ($function) { $function="0"; }
442: if ($target eq 'web') {
1.41 www 443: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
1.47 www 444: unless (defined($xinitial)) { $xinitial=$xmin; }
445: unless (defined($xfinal)) { $xfinal=$xmax; }
446: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
1.13 www 447: } elsif ($target eq 'edit') {
448: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
449: &Apache::edit::text_arg('Function:','function',
450: $token,'16').
1.47 www 451: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
452: $token,'8').
453: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
454: $token,'8').
1.41 www 455: &Apache::edit::text_arg('Label on Plot:','label',
456: $token,'8').
1.46 www 457: &Apache::edit::text_arg('Color (hex code):','color',
458: $token,'8').
1.13 www 459: &Apache::edit::select_arg('Fixed location:','fixed',
460: ['yes','no'],$token).
461: &Apache::edit::end_row();
462: } elsif ($target eq 'modified') {
463: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.47 www 464: $safeeval,'function','label','xinitial','xfinal','color','fixed');
1.13 www 465: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
466: }
467: return $result;
1.4 www 468: }
469:
470: sub end_backgroundplot {
1.13 www 471: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
472: my $result='';
473: if ($target eq 'edit') {
474: $result=&Apache::edit::end_table();
475: }
476: return $result;
1.6 www 477: }
478:
479: #
1.25 www 480: # <functionplotrule ... />
1.12 www 481: #
1.25 www 482: sub start_functionplotrule {
1.12 www 483: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
484: my $result='';
1.24 www 485: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
486: $Apache::functionplotresponse::counter++;
487: if ($label=~/\W/) {
1.25 www 488: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 489: }
490: $label=~s/\W//gs;
491: unless ($label) {
492: $label='R'.$Apache::functionplotresponse::counter;
493: } else {
494: $label='R'.$label;
495: }
496: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 497: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 498: }
499:
500:
501: if ($target eq 'grade') {
502: # Simply remember - in order - for later
1.25 www 503: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
504: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 505: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 506: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 507: }
508: $beginninglabel=~s/\W//gs;
509: $endinglabel=~s/\W//gs;
510: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
511: $relationship=~s/\W//gs;
512: $relationship=lc($relationship);
513: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 514: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 515: $relationship='eq';
516: }
1.35 www 517: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 518: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 519: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 520: $derivative=0;
521: }
1.25 www 522: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 523: $label,
524: $derivative,
1.25 www 525: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 526: $beginninglabel,
1.25 www 527: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 528: $endinglabel,
1.35 www 529: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
530: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 531: $relationship,
1.33 www 532: &Apache::lonxml::get_param('value',$parstack,$safeeval),
533: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 534: )));
535: } elsif ($target eq 'edit') {
1.29 www 536: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 537: &Apache::edit::text_arg('Index/Name:','index',
538: $token,'10').' '.
1.35 www 539: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 540: [['0','Function itself'],
541: ['1','First derivative'],
1.42 www 542: ['2','Second derivative'],
543: ['-1','Integral']],$token).'<br />'.
1.44 www 544: &Apache::edit::text_arg('Initial x-value:','xinitial',
1.35 www 545: $token,'8').
1.44 www 546: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
547: [['start','Start of Plot'],
548: ['end','End of Plot']],$token,'8').'<br />'.
1.30 www 549:
1.44 www 550: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
1.35 www 551: $token,'8').
1.44 www 552: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
1.32 www 553: [['end','End of Plot']],$token,'8').'<br />'.
1.44 www 554: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
1.35 www 555: $token,'8').
1.44 www 556: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
1.35 www 557: $token,'8').'<br />'.
1.38 www 558: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 559: [['eq','equal'],
560: ['ne','not equal'],
561: ['ge','greater than or equal'],
562: ['gt','greater than'],
563: ['lt','less than'],
564: ['le','less than or equal']],$token).
565: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.35 www 566: [['undef','not defined']],$token,'8').
1.29 www 567: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 568: $token,'8').
1.29 www 569: &Apache::edit::end_row();
570: } elsif ($target eq 'modified') {
1.54 www 571: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
1.53 www 572: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
573: }
1.54 www 574: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
1.53 www 575: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
576: }
1.29 www 577: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 578: $safeeval,'index','derivativeorder',
579: 'xinitial','xinitiallabel','xfinal','xfinallabel',
580: 'minimumlength','maximumlength',
581: 'relationship','value','percenterror');
1.29 www 582: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 583: }
1.12 www 584: return $result;
585: }
586:
1.25 www 587: sub end_functionplotrule {
1.13 www 588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
589: my $result='';
590: if ($target eq 'edit') {
591: $result=&Apache::edit::end_table();
592: }
593: return $result;
1.12 www 594: }
595:
596:
597: #
1.23 www 598: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 599: #
600: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
601: #
602: sub start_spline {
603: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 604: my $result='';
605: if ($target eq 'web') {
1.23 www 606: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 607: $Apache::functionplotresponse::counter++;
608: if ($label=~/\W/) {
1.23 www 609: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 610: }
611: $label=~s/\W//gs;
1.23 www 612: unless ($label) {
613: $label='S'.$Apache::functionplotresponse::counter;
614: } else {
615: $label='S'.$label;
616: }
1.13 www 617: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 618: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 619: }
620:
621: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
622: if ($order<2) { $order=2; }
623: if ($order>8) { $order=8; }
624: $Apache::functionplotresponse::splineorder{$label}=$order;
625:
626: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
627: unless ($x) { $x=0; }
628: $Apache::functionplotresponse::splineinitx{$label}=$x;
629:
630: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
631: unless ($y) { $y=0; }
632: $Apache::functionplotresponse::splineinity{$label}=$y;
633:
634: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
635: unless ($sx) { $sx=$order; }
636: $Apache::functionplotresponse::splinescalex{$label}=$sx;
637:
638: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
639: unless ($sy) { $sy=2; }
640: $Apache::functionplotresponse::splinescaley{$label}=$sy;
641: } elsif ($target eq 'edit') {
642: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 643: &Apache::edit::text_arg('Index:','index',
1.14 www 644: $token,'4').' '.
1.13 www 645: &Apache::edit::select_arg('Order:','order',
1.44 www 646: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 647: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 648: $token,'4').' '.
1.13 www 649: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 650: $token,'4').' '.
1.13 www 651: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 652: $token,'4').' '.
1.13 www 653: &Apache::edit::text_arg('Scale y:','scaley',
654: $token,'4').
655: &Apache::edit::end_row();
656: } elsif ($target eq 'modified') {
657: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 658: $safeeval,'index','order','initx','inity',
1.13 www 659: 'scalex','scaley');
660: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
661: }
662: return $result;
1.6 www 663: }
664:
665: sub end_spline {
1.13 www 666: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
667: my $result='';
668: if ($target eq 'edit') {
669: $result=&Apache::edit::end_table();
670: }
671: return $result;
1.4 www 672: }
673:
1.3 www 674: sub end_init_script {
675: return (<<ENDENDINIT);
676: }
677: // ]]>
678: </script>
679: ENDENDINIT
680: }
681:
1.10 www 682: #
683: # Storing and restoring spline coordinates from part answers
684: #
685: sub decode_previous_answer {
686: my ($answer)=@_;
687: foreach my $coordinate (split(/\,/,$answer)) {
688: my ($key,$value)=split(/\=/,$coordinate);
689: $Apache::functionplotresponse::previous{$key}=$value;
690: }
691: }
692:
693: sub get_answer_from_form_fields {
694: my ($id)=@_;
695: my $answer='';
696: my %coords=();
697: foreach my $field (keys(%env)) {
698: if ($field=~/^form\.HWVAL\_$id/) {
699: $field=~/^form\.(.*)$/;
700: $coords{$1}=$env{$field};
701: }
702: }
703: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
704: return ($answer,%coords);
705: }
706:
1.15 www 707: #
708: # The following functions calculate the cubic-hermite splines server-side
709: #
710:
711: sub cubic_hermite {
712: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 713: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
714: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 715: }
716:
717: #
718: # d/dt(...)
719: #
720:
721: sub ddt_cubic_hermite {
722: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 723: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
724: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 725: }
726:
727: #
728: # d^2/dt^2(...)
729: #
730:
731: sub d2dt2_cubic_hermite {
732: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 733: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
734: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 735: }
736:
737: #
1.18 www 738: # Array index calculation
739: #
740: sub array_index {
741: my ($xmin,$xmax,$x)=@_;
1.38 www 742: if ($x ne '') {
743: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
744: } else {
745: return undef;
746: }
1.20 www 747: }
748:
749: #
1.18 www 750: # Populate the arrays
751: #
752:
753: sub populate_arrays {
1.64 ! www 754: my ($id,$xmin,$xmax,$ymin,$ymax)=@_;
1.26 www 755: for (my $i=0; $i<=400; $i++) {
1.35 www 756: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 757: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 758: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 759: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 760: }
1.19 www 761: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 762: # Run over all splines in response
763: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 764: my $xiold=-1;
1.18 www 765: # Run over all points in spline
1.19 www 766: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 767: my $ni=$i+1;
768: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
769: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
770: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
771: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
772: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
773: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
774: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
775: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
776: # Run in small steps over spline parameter
1.26 www 777: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 778: my $xreal=&cubic_hermite($t,@xparms);
779: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 780: if ($xi<$xiold) { return 'no_func'; }
1.26 www 781: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.18 www 782: $xiold=$xi;
1.35 www 783: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 784: # Function value
1.30 www 785: my $funcval=&cubic_hermite($t,@yparms);
1.64 ! www 786:
! 787: # Do we already have a value for this point, and is it different from the new one?
! 788: if ((defined($Apache::functionplotresponse::func[$xi])) &&
! 789: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) {
! 790: return 'no_func';
! 791: }
! 792: # Okay, remember the new point
1.30 www 793: $Apache::functionplotresponse::func[$xi]=$funcval;
1.64 ! www 794:
1.30 www 795: if (defined($funcval)) {
796: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
797: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
798: }
799: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
800: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
801: }
802: }
1.28 www 803: # Chain rule
1.22 www 804: # dy/dx=dy/dt/(dx/dt)
805: my $dxdt=&ddt_cubic_hermite($t,@xparms);
806: if ($dxdt) {
807: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 808: # Second derivative
1.28 www 809: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 810: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
811: ($dxdt*$dxdt*$dxdt);
1.22 www 812: }
1.18 www 813: }
814: }
815: }
816: }
817: }
818:
819: #
1.37 www 820: # Implementation of <functionplotresponse>
1.15 www 821: #
822:
1.1 www 823: sub start_functionplotresponse {
824: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
825: my $result='';
1.6 www 826: # To remember the splines - somehow, they need to come last
827: undef %Apache::functionplotresponse::splineorder;
828: undef %Apache::functionplotresponse::splineinitx;
829: undef %Apache::functionplotresponse::splineinity;
830: undef %Apache::functionplotresponse::splinescalex;
831: undef %Apache::functionplotresponse::splinescaley;
1.10 www 832: # Remember input fields, etc
833: undef %Apache::functionplotresponse::previous;
1.9 www 834: $Apache::functionplotresponse::inputfields='';
1.6 www 835: $Apache::functionplotresponse::counter=0;
1.24 www 836: # Remember rules
1.25 www 837: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 838: # Remember failed rules
839: if ($target eq 'grade') {
840: undef @Apache::functionplotresponse::failedrules;
841: }
842: # Delete previous awards
843: undef $Apache::functionplotresponse::awarddetail;
1.10 www 844: # Part and ID
845: my $partid=$Apache::inputtags::part;
846: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 847: # Internal ID to mark the applet and its coordinates
1.10 www 848: my $internalid = $partid.'_'.$id;
849: # Previous answer
850: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
851:
1.6 www 852: # Parameters of <functionplotresponse>
1.41 www 853: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 854: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
855: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
856: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 857: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
858: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 859: if ($target eq 'edit') {
860: $result.=&Apache::edit::start_table($token)
861: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
862: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 863: .&Apache::edit::deletelist($target,$token).' '
1.50 www 864: .&Apache::edit::insertlist($target,$token).' '
865: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1.12 www 866: .'</span></td>'
867: ."<td> "
868: .&Apache::edit::end_row()
869: .&Apache::edit::start_spanning_row()
870: ."\n";
1.14 www 871: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
872: $token,'6').' '.
873: &Apache::edit::text_arg('Minimum x-value:','xmin',
874: $token,'4').' '.
1.12 www 875: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 876: $token,'4').' '.
1.12 www 877: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 878: ['yes','no'],$token).'<br />'.
1.14 www 879: &Apache::edit::text_arg('Label y-axis:','ylabel',
880: $token,'6').' '.
1.12 www 881: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 882: $token,'4').' '.
1.12 www 883: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 884: $token,'4').' '.
1.12 www 885: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 886: ['yes','no'],$token).'<br />'.
1.12 www 887: &Apache::edit::select_arg('Grid visible:','gridvisible',
1.47 www 888: ['yes','no'],$token).'<br />'.
1.58 www 889: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1.63 raeburn 890: 'answerdisplay',$token,'50').
1.12 www 891: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
892: } elsif ($target eq 'modified') {
893: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 894: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.47 www 895: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1.12 www 896: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 897:
1.12 www 898: } elsif ($target eq 'meta') {
1.10 www 899: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 900: } elsif (($target eq 'answer') &&
901: ($env{'form.answer_output_mode'} ne 'tex') &&
902: ($Apache::lonhomework::viewgrades == 'F')) {
903: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
904: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
905: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
906: {'only_body' => 1,
907: 'bgcolor' => '#FFFFFF',
908: 'js_ready' => 1,});
909: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
910: $uname =~s/\W//g;
911: $udom =~s/\W//g;
912: my $function_name =
913: join('_','LONCAPA_scriptvars',$uname,$udom,
914: $env{'form.counter'},$Apache::lonxml::curdepth);
915: my $rules_var ="<script type=\"text/javascript\">
916: // <![CDATA[
917: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
918: $Apache::functionplotresponse::ruleslog.
919: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
920: // ]]>
921: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
922: &Apache::lonxml::add_script_result($rules_var);
923: }
924:
1.1 www 925: return $result;
926: }
927:
1.25 www 928: sub compare_rel {
1.26 www 929: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 930: # is the real value undefined?
1.26 www 931: unless (defined($realval)) {
1.36 www 932: # the real value is not defined
1.26 www 933: if ($relationship eq 'eq') {
934: if ($value eq 'undef') {
935: return 1;
936: } else {
937: return 0;
938: }
939: } elsif ($relationship eq 'ne') {
940: if ($value eq 'undef') {
941: return 0;
942: } else {
943: return 1;
944: }
945: } else {
946: return 0;
947: }
948: }
949:
1.36 www 950: # is the expected value undefined?
951: if ($value eq 'undef') {
952: # but by now we know that the real value is defined
953: return 0;
954: }
955:
956: # both are defined.
1.26 www 957: if ($relationship eq 'gt') {
958: return ($realval>$value);
959: } elsif ($relationship eq 'ge') {
960: return ($realval>$value-$tol);
961: } elsif ($relationship eq 'lt') {
962: return ($realval<$value);
963: } elsif ($relationship eq 'le') {
964: return ($realval<$value+$tol);
965: } elsif ($relationship eq 'ne') {
966: return (abs($value-$realval)>$tol);
967: } else {
968: return (abs($value-$realval)<$tol);
969: }
1.25 www 970: return 0;
971: }
972:
1.35 www 973: sub addlog {
974: my ($text)=@_;
975: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
976: }
977:
978: sub actualval {
979: my ($i,$xmin,$xmax)=@_;
980: return $xmin+$i/400.*($xmax-$xmin);
981: }
982:
1.25 www 983: sub functionplotrulecheck {
1.33 www 984: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
985:
1.35 www 986: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 987: =split(/\:/,$rule);
1.33 www 988: $percent=($percent>0?$percent:5);
1.35 www 989: &addlog("=================");
1.42 www 990: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.49 www 991: if ((defined($minimumlength)) || (defined($maximumlength))) {
992: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
993: }
1.30 www 994: my $li=0;
995: my $lh=400;
996:
1.31 www 997: # Special case: the upper boundary was not defined
998: # and needs to be set to the value where
999: # the condition is not true anymore => set flag
1000:
1001: my $findupper=0;
1002: if (($xfinal eq '')
1003: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
1004: && ($xfinallabel)) {
1005: $findupper=1;
1006: }
1007:
1.25 www 1008: # if a hard value is set for the boundaries, it overrides the label
1.30 www 1009: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
1010: $li=&array_index($xmin,$xmax,$xinitial);
1011: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
1012: }
1013: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
1014: $lh=&array_index($xmin,$xmax,$xfinal);
1015: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 1016: }
1.31 www 1017: # if the label is defined, use it
1.25 www 1018: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 1019: &addlog("Using lower label $xinitiallabel");
1.30 www 1020: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1021: } else {
1022: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 1023: }
1.31 www 1024: unless ($findupper) {
1025: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 1026: &addlog("Using upper label $xfinallabel");
1.33 www 1027: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 1028: } else {
1029: $lh=&array_index($xmin,$xmax,$xfinal);
1030: }
1.25 www 1031: }
1032: # Basic sanity checks
1.30 www 1033: if ($li<0) { $li=0; }
1034: if ($lh>400) { $lh=400; }
1.38 www 1035: if (($li>$lh) || (!defined($lh))) {
1.30 www 1036: $lh=$li;
1.25 www 1037: }
1.31 www 1038:
1.35 www 1039: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1040: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1041: if ($findupper) {
1042: &addlog("Looking for label $xfinallabel");
1043: }
1.33 www 1044: my $tol=$percent*($ymax-$ymin)/100;
1045: if ($xmax>$xmin) {
1046: if ($derivative==2) {
1047: $tol=4.*$tol/($xmax-$xmin);
1048: } elsif ($derivative==1) {
1049: $tol=2.*$tol/($xmax-$xmin);
1.42 www 1050: } elsif ($derivative==-1) {
1051: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 1052: }
1.27 www 1053: }
1.42 www 1054: my $integral=0;
1055: my $binwidth=($xmax-$xmin)/400.;
1056: if (($derivative<0) && (!$findupper)) {
1057: # definite integral, calculate over whole length
1058: &addlog("Calculating definite integral");
1059: for (my $i=$li; $i<=$lh; $i++) {
1060: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1061: }
1062: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1063: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1064: &addlog("Rule $label failed.");
1065: my $hintlabel=$label;
1066: $hintlabel=~s/^R//;
1067: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1068: &addlog("Set hint condition $hintlabel");
1069: return 0;
1070: }
1071: } else {
1072: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 1073: my $val;
1074: if ($derivative==2) {
1.27 www 1075: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 1076: } elsif ($derivative==1) {
1.27 www 1077: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 1078: } elsif ($derivative==-1) {
1079: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1080: $val=$integral;
1.25 www 1081: } else {
1.27 www 1082: $val=$Apache::functionplotresponse::func[$i];
1.25 www 1083: }
1.31 www 1084: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 1085: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 1086: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 1087: if (($findupper) && ($i>$li)) {
1.49 www 1088: # Check lengths
1089: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1090: # Successfully found a new label, set it
1.31 www 1091: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1092: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1093: return 1;
1094: } else {
1.35 www 1095: &addlog("Rule $label failed.");
1.49 www 1096: &setfailed($label);
1.31 www 1097: return 0;
1098: }
1099: }
1.42 www 1100: }
1.25 www 1101: }
1.49 www 1102: # Corner case where this makes sense: using start or stop as defined labels
1103: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1.35 www 1104: &addlog("Rule $label passed.");
1.27 www 1105: return 1;
1.24 www 1106: }
1107:
1.49 www 1108: #
1109: # check for minimum and maximum lengths
1110: #
1111:
1112: sub checklength {
1113: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1114: unless (($minimumlength) || ($maximumlength)) { return 1; }
1115: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1116: if ($minimumlength) {
1117: if ($length<$minimumlength) {
1118: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1119: &setfailed($label);
1120: return 0;
1121: }
1122: }
1123: if ($maximumlength) {
1124: if ($length>$maximumlength) {
1125: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1126: &setfailed($label);
1127: return 0;
1128: }
1129: }
1130: return 1;
1131: }
1132:
1133: sub setfailed {
1134: my ($label)=@_;
1135: my $hintlabel=$label;
1136: $hintlabel=~s/^R//;
1137: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1138: &addlog("Set hint condition $hintlabel");
1139: }
1140:
1.37 www 1141: sub start_functionplotruleset {
1142: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1143: if ($target eq 'edit') {
1144: return &Apache::edit::start_table($token).
1145: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1146: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1147: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1148: &Apache::edit::insertlist($target,$token).' '
1149: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1.37 www 1150: .'</span></td>'
1151: ."<td> "
1152: .&Apache::edit::end_row()
1153: .&Apache::edit::start_spanning_row()
1154: ."\n";
1155: }
1156: }
1.3 www 1157:
1.37 www 1158: sub end_functionplotruleset {
1159: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1160: my $id=$Apache::inputtags::response[-1];
1161: my $partid=$Apache::inputtags::part;
1162: my $internalid = $partid.'_'.$id;
1163:
1164: if ($target eq 'edit' ) {
1165: return &Apache::edit::end_table();
1166: } elsif ($target eq 'grade'
1.10 www 1167: && &Apache::response::submitted()
1168: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1169: #
1170: # Actually grade
1171: #
1.41 www 1172: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1173:
1.24 www 1174: my $ad='';
1.30 www 1175: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1176: $Apache::functionplotresponse::ruleslog='';
1.30 www 1177: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1178: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.64 ! www 1179: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') {
1.21 www 1180: $ad='NOT_FUNCTION';
1.18 www 1181: } else {
1.35 www 1182: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1183: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1184: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1185: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1186:
1.24 www 1187: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1188: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.33 www 1189: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
1.24 www 1190: $ad='INCORRECT';
1191: last;
1192: }
1193: }
1194: # If it's not wrong, it's correct
1195: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1196: }
1.37 www 1197: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1198: &addlog("Assigned award detail: $ad");
1199: # Store for later to be assigned at end_functionplotresponse
1200: $Apache::functionplotresponse::awarddetail=$ad;
1201: }
1202: }
1203:
1204:
1205: sub end_functionplotresponse {
1206: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1207: &Apache::response::end_response;
1208:
1209: my $result;
1210: my $id=$Apache::inputtags::response[-1];
1211: my $partid=$Apache::inputtags::part;
1212: my $internalid = $partid.'_'.$id;
1.20 www 1213:
1.37 www 1214: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1215: if ($target eq 'grade'
1216: && &Apache::response::submitted()
1217: && $Apache::lonhomework::type eq 'exam') {
1218:
1219: &Apache::response::scored_response($partid,$id);
1220:
1221: } elsif ($target eq 'grade'
1222: && &Apache::response::submitted()
1223: && $Apache::lonhomework::type ne 'exam') {
1224: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1225: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1226: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1227: #
1228: # Assign grade
1229: #
1230: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1231: #
1232: # Store grading info
1233: #
1234: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1235: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1236: } elsif ($target eq 'web') {
1.37 www 1237: undef @Apache::functionplotresponse::failedrules;
1238: }
1239: return $result;
1240: }
1241:
1242: sub end_functionplotelements {
1243: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1244: my $result='';
1245: my $id=$Apache::inputtags::response[-1];
1246: my $partid=$Apache::inputtags::part;
1247: my $internalid = $partid.'_'.$id;
1248: if ($target eq 'edit' ) {
1249: $result=&Apache::edit::end_table();
1250: } elsif ($target eq 'web') {
1.47 www 1251: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1252:
1253: # Are we in show answer mode?
1254: my $showanswer=&Apache::response::show_answer();
1255: if ($showanswer) {
1256: # Render answerdisplay
1257: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1258: if ($answerdisplay=~/\S/s) {
1259: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1.58 www 1260: my @components=split(/\s*\:\s*/,$plot);
1261: if ($#components<3) {
1262: # Just a simple plot
1263: my ($func,$xl,$xh)=@components;
1264: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1265: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1266: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1267: } else {
1268: # This is a spline
1.59 www 1269: $result.=&answer_spline_script($internalid,@components);
1.58 www 1270: }
1.47 www 1271: }
1272: }
1273: }
1.48 www 1274: my $fixed=0;
1275: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1.6 www 1276: # Now is the time to render all of the stored splines
1277: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.48 www 1278: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1.6 www 1279: }
1.5 www 1280: # close the init script
1.3 www 1281: $result.=&end_init_script();
1.17 www 1282: # register all splines in this response
1283: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1284: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1285: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1286: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1287: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1288: }
1.9 www 1289: # generate the input fields
1290: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1291: # actually start the <applet>-tag
1.3 www 1292: $result.=&geogebra_startcode($internalid);
1.5 www 1293: # load the spline bytecode
1.3 www 1294: $result.=&geogebra_spline_program();
1.5 www 1295: # set default parameters
1.3 www 1296: $result.=&geogebra_default_parameters($internalid);
1.5 www 1297: # close the <applet>-tag
1.1 www 1298: $result.=&geogebra_endcode();
1299: }
1300: return $result;
1301: }
1302:
1.41 www 1303: sub boundaries {
1304: my ($parstack,$safeeval,$level)=@_;
1305: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1306: $xmin=(defined($xmin)?$xmin:-10);
1307: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1308: $xmax=(defined($xmax)?$xmax:10);
1309: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1310: $ymin=(defined($ymin)?$ymin:-10);
1311: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1312: $ymax=(defined($ymax)?$ymax:10);
1313: if ($xmax<=$xmin) {
1314: $xmax=$xmin+20;
1315: }
1316: if ($ymax<=$ymin) {
1317: $ymax=$ymin+20;
1318: }
1319: return ($xmin,$xmax,$ymin,$ymax);
1320: }
1321:
1.37 www 1322: sub start_functionplotelements {
1323: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1324: my $result='';
1325: my $id=$Apache::inputtags::response[-1];
1326: my $partid=$Apache::inputtags::part;
1327: my $internalid = $partid.'_'.$id;
1328:
1329: if ($target eq 'edit') {
1330: return &Apache::edit::start_table($token).
1331: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1332: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1333: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1334: &Apache::edit::insertlist($target,$token).' '
1335: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
1.37 www 1336: .'</span></td>'
1337: ."<td> "
1338: .&Apache::edit::end_row()
1339: .&Apache::edit::start_spanning_row()
1340: ."\n";
1341: } elsif ($target eq 'web') {
1.41 www 1342: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1343: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1344: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1345: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1346: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1347: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1348:
1349:
1350: # paste in the update routine to receive stuff back from the applet
1351: $result.=&update_script($internalid);
1352: # start the initscript for this applet
1353: $result.=&start_init_script($internalid);
1354: # put the axis commands inside
1355: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.45 www 1356: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
1.37 www 1357: # init script is left open
1358: }
1359: return $result;
1360: }
1361:
1.1 www 1362: 1;
1363:
1364: __END__
1365:
1366: =head1 NAME
1367:
1368: Apache::functionplotresponse.pm;
1369:
1370: =head1 SYNOPSIS
1371:
1372: Handles tags associated with accepting function plots.
1373:
1374: This is part of the LearningOnline Network with CAPA project
1375: described at http://www.lon-capa.org.
1376:
1377: =head1 HANDLER SUBROUTINE
1378:
1379: start_functionplotresponse()
1380:
1381: =head1 OTHER SUBROUTINES
1382:
1383: =over
1384:
1385: =item end_functionplotresponse()
1386:
1387: =back
1388:
1389: =cut
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