1: # LearningOnline Network with CAPA
2: # Functionplot responses
3: #
4: # $Id: functionplotresponse.pm,v 1.85 2011/11/22 02:13:37 www Exp $
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;
34: use Apache::run;
35: use LONCAPA;
36:
37: BEGIN {
38: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
39: 'plotobject','plotvector',
40: 'functionplotvectorrule','functionplotvectorsumrule',
41: 'functionplotcustomrule',
42: 'functionplotrule','functionplotruleset',
43: 'functionplotelements'));
44: }
45:
46: #
47: # There can be a number of applets on a page, each called ggbApplet_$id,
48: # where $id is the "_"-concatenated part and responseid
49: #
50:
51: sub geogebra_startcode {
52: my ($id)=@_;
53: return (<<ENDSTARTCODE);
54: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
55: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
56: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
57: ENDSTARTCODE
58: }
59:
60: sub geogebra_endcode {
61: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
62: }
63:
64: #
65: # This is the internal GeoGebra bytecode which defines the spline functions
66: #
67: sub geogebra_spline_program {
68: return (<<ENDSPLINEPROGRAM);
69: <param name="ggbBase64" value="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"/>
70: ENDSPLINEPROGRAM
71: }
72:
73: #
74: # The standard set of parameters inside <applet>
75: #
76: sub geogebra_default_parameters {
77: my ($id)=@_;
78: return(<<ENDDEFAULTPARAMETERS);
79: <param name="image" value="/adm/lonIcons/lonanim.gif" />
80: <param name="boxborder" value="false" />
81: <param name="centerimage" value="true" />
82: <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" />
83: <param name="cache_version" value="4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0" />
84: <param name="framePossible" value="false" />
85:
86: <param name="showResetIcon" value="false" />
87: <param name="showAnimationButton" value="false" />
88: <param name="enableRightClick" value="false" />
89: <param name="errorDialogsActive" value="true" />
90: <param name="enableLabelDrags" value="false" />
91: <param name="showMenuBar" value="false" />
92: <param name="showToolBar" value="false" />
93: <param name="showToolBarHelp" value="false" />
94: <param name="showAlgebraInput" value="false" />
95: <param name="enableShiftDragZoom" value="false" />
96: <param name="allowRescaling" value="false" />
97: <param name="enableLabelDrags" value="false" />
98: <param name="ggbOnInitParam" value="applet_$id" />
99: ENDDEFAULTPARAMETERS
100: }
101:
102: #
103: # This subroutine is called by LON-CAPA at </problem>
104: # Each applet on the page will call function ggbOnInit when it is done loading
105: # This function in turn will call the respective function registered by start_init_script
106: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
107: #
108:
109: sub init_script {
110: if ($#Apache::functionplotresponse::callscripts>=0) {
111: my $script='';
112: foreach my $id (@Apache::functionplotresponse::callscripts) {
113: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
114: }
115: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
116: ") { setTimeout('ggbInitAll()',200) }";
117: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
118: return (<<ENDGGBINIT);
119: <script type="text/javascript">
120: // <![CDATA[
121: // Function that each applet will call when loaded
122: // It will pass "its" parameter
123: // Set flags for when an applet is loaded, wait till all are loaded, and then some
124: function ggbOnInit(param) {
125: $script
126: }
127: function ggbInitAll() {
128: $calls
129: }
130: // ]]>
131: </script>
132: ENDGGBINIT
133: }
134: }
135:
136: #
137: # Each Geogebra applet is supposed to call this when parameters change
138: # Changes the hidden fields on the web page
139: #
140: sub update_script {
141: my ($id)=@_;
142: return (<<ENDUPDATESCRIPT);
143: <script type="text/javascript">
144: // <![CDATA[
145: function updatePointCoordinates_$id(coordinateName) {
146: var x = document.ggbApplet_$id.getXcoord(coordinateName);
147: var y = document.ggbApplet_$id.getYcoord(coordinateName);
148: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
149: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
150: }
151: // ]]>
152: </script>
153: ENDUPDATESCRIPT
154: }
155:
156: #
157: # Register the above update-handler for a variable
158: #
159:
160: sub update_register {
161: my ($id,$variable)=@_;
162: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
163: }
164:
165: #
166: # Set a point coordinate variable
167: #
168: sub set_point_coordinate {
169: my ($id,$variable,$x,$y,$fixed)=@_;
170: my $mult=($fixed?'a*':'');
171: # Get rid of wild exponents, make sure it's a number
172: $x=1.*$x;
173: $y=1.*$y;
174: # GeoGebra does not understand "E"
175: $x=~s/[e|E]/\*10\^/;
176: $x=~s/\+//;
177: $y=~s/[e|E]/\*10\^/;
178: $y=~s/\+//;
179: return (<<ENDSETVARIABLE);
180: document.ggbApplet_$id.evalCommand("a=1");
181: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
182: document.ggbApplet_$id.setLabelVisible("$variable",false);
183: ENDSETVARIABLE
184: }
185:
186: #
187: # Set a slope coordinate variable
188: #
189: sub set_slope_coordinate {
190: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
191: my $xvariable=$variable.'x';
192: my $yvariable=$variable.'y';
193: my $domain=$xmax-$xmin;
194: my $range=$ymax-$ymin;
195: my $xinterval=$domain/100.;
196: my $yinterval=$range/200.;
197: my $mult=($fixed?'a*':'');
198: return (<<ENDSETSVARIABLE);
199: document.ggbApplet_$id.evalCommand("a=1");
200: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
201: document.ggbApplet_$id.setVisible("$xvariable", false);
202: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
203: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
204: document.ggbApplet_$id.setVisible("$yvariable", false);
205: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
206: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
207: document.ggbApplet_$id.setLabelVisible("$variable", false);
208: ENDSETSVARIABLE
209: }
210:
211: #
212: # Input field name for a coordinate variable
213: #
214:
215: sub field_name {
216: my ($id,$variable,$name)=@_;
217: return "HWVAL_$id\_$variable\_$name";
218: }
219:
220: #
221: # Generate an input field for a coordinate variable
222: #
223:
224: sub generate_input_field {
225: my ($id,$variable,$x,$y)=@_;
226: $Apache::functionplotresponse::inputfields.=
227: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
228: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
229: }
230:
231: #
232: # Initialize a new point coordinate variable at set a listener on it
233: #
234: sub new_point_coordinate {
235: my ($id,$variable,$x,$y,$fixed)=@_;
236: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
237: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
238: }
239: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
240: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
241: }
242: &generate_input_field($id,$variable,$x,$y);
243: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
244: }
245:
246: #
247: # Initialize a new slope coordinate variable at set a listener on it
248: #
249: sub new_slope_coordinate {
250: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
251: #
252: # $variable: name of the slope point
253: # $x, $y: coordinates of the slope point
254: # $pointname: name of the associated point point
255: # $xp $yp: coordinates of the point point
256: #
257: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
258: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
259: }
260: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
261: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
262: }
263: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
264: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
265: }
266: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
267: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
268: }
269:
270: &generate_input_field($id,$variable,$x,$y);
271: my $xrel=$x-$xp;
272: my $yrel=$y-$yp;
273: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
274: }
275:
276: #
277: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
278: # It then starts the right headers
279: #
280: sub start_init_script {
281: my ($id)=@_;
282: # Add id to the list of ggbInit_$id functions that need to be called
283: push(@Apache::functionplotresponse::callscripts,$id);
284: # ... and open this function
285: return (<<ENDSTARTINIT);
286: <script type="text/javascript">
287: // <![CDATA[
288: // variable that will eventually be passed back to the server
289: var coordinateMap_$id = [];
290: // flag for not loaded yet
291: var loaded_$id=false;
292: // Init-function for applet
293: function ggbInit_$id() {
294: ENDSTARTINIT
295: }
296:
297: #
298: # This sets the axes inside ggbInit_$id
299: #
300:
301: sub axes_script {
302: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
303: return (<<ENDAXESSCRIPT);
304: // changes (xmin, xmax, ymin, ymax)
305: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
306:
307: // makes the (x,y) axis (in)visible
308: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
309: // makes the grid (in)visible
310: document.ggbApplet_$id.setGridVisible($gvisible);
311: ENDAXESSCRIPT
312: }
313:
314: sub axes_label {
315: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
316: unless ($xlabel || $ylabel) { return ''; }
317: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
318: if ($xlabel) {
319: if (($ymin<0) && ($ymax>0)) {
320: $return.=(<<ENDXAXISLABELSCRIPT);
321: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
322: document.ggbApplet_$id.setVisible("Xlabel",false);
323: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
324: ENDXAXISLABELSCRIPT
325: } else {
326: $return.=(<<ENDXOFFAXISLABEL);
327: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
328: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
329: ENDXOFFAXISLABEL
330: }
331: }
332: if ($ylabel) {
333: if (($xmin<0) && ($xmax>0)) {
334: $return.=(<<ENDYAXISLABELSCRIPT);
335: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
336: document.ggbApplet_$id.setVisible("Ylabel",false);
337: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
338: ENDYAXISLABELSCRIPT
339: } else {
340: $return.=(<<ENDYOFFAXISLABEL);
341: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
342: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
343: ENDYOFFAXISLABEL
344: }
345: }
346: return $return;
347: }
348:
349: #
350: # Subroutine to produce background and answer plots
351: #
352:
353: sub plot_script {
354: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
355: $label=~s/\W//g;
356: if (($label) && ($label!~/^[A-Za-z]/)) {
357: $label='C'.$label;
358: }
359: my $visible=0;
360: if ($label) {
361: $visible="1";
362: } else {
363: $Apache::functionplotresponse::counter++;
364: $label='C'.$Apache::functionplotresponse::counter;
365: }
366: my $rc=0;
367: my $gc=0;
368: my $bc=0;
369: if ($color) {
370: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
371: $rc=hex($rh);
372: $gc=hex($gh);
373: $bc=hex($bh);
374: }
375: if ($fixed) {
376: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
377: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
378: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
379: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
380: } else {
381: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
382: }
383: }
384:
385: #
386: # Subroutine to produce objects
387: #
388:
389: sub plotobject_script {
390: my ($id,$label,$x,$y)=@_;
391: unless ($label) {
392: $Apache::functionplotresponse::counter++;
393: $label='O'.$Apache::functionplotresponse::counter;
394: }
395: &generate_input_field($id,$label,$x,$y);
396: return "document.ggbApplet_$id.evalCommand('a=1');\n".
397: "document.ggbApplet_$id.setVisible('a', false);\n".
398: "document.ggbApplet_$id.setLabelVisible('a', false);\n".
399: "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n".
400: "document.ggbApplet_$id.setVisible('$label', true);\n".
401: "document.ggbApplet_$id.setLabelVisible('$label', true);\n";
402: }
403:
404: #
405: # Subroutine to produce vectors
406: #
407:
408: sub plotvector_script {
409: my ($id,$label,$xs,$ys,$xe,$ye,$xmin,$xmax)=@_;
410: unless ($label) {
411: $Apache::functionplotresponse::counter++;
412: $label='V'.$Apache::functionplotresponse::counter;
413: }
414: my $startlabel=$label.'Start';
415: my $endlabel=$label.'End';
416: my $pointlabel=$label.'Point';
417: my $pointx=2.*($xmax-$xmin)+$xmax;
418: my $anglelabel=$label.'Angle';
419: return
420: &new_point_coordinate($id,$startlabel,$xs,$ys,0).
421: &new_point_coordinate($id,$endlabel,$xe,$ye,0).
422: (<<ENDVECTOR);
423: document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]");
424: document.ggbApplet_$id.setLabelVisible("$label",true);
425: document.ggbApplet_$id.setLineThickness("$label",8);
426: document.ggbApplet_$id.evalCommand("$pointlabel=($pointx,y($startlabel))");
427: document.ggbApplet_$id.evalCommand("$anglelabel=Angle[$pointlabel,$startlabel,$endlabel]");
428: document.ggbApplet_$id.setLabelVisible("$anglelabel",true);
429: document.ggbApplet_$id.setLabelStyle("$anglelabel",VALUE=2);
430: ENDVECTOR
431: }
432:
433: #
434: # Answer spline display
435: #
436: # points: x,y,slope_x,slope_y
437:
438: sub answer_spline_script {
439: my ($id,@points)=@_;
440: my $order=int(($#points+1)/4);
441: if ($order<2) { $order=2; }
442: if ($order>8) { $order=8; }
443: $Apache::functionplotresponse::counter++;
444: my $label='CSpline'.$Apache::functionplotresponse::counter;
445: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'[';
446: for (my $i=0;$i<=$#points;$i+=4) {
447: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),";
448: }
449: $output=~s/\,$//;
450: $output.=']");'."\n";
451: for (my $i=2; $i<2*$order; $i+=2) {
452: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n";
453: }
454: for (my $i=1; $i<2*$order; $i+=2) {
455: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n";
456: }
457:
458: return $output;
459: }
460:
461: #
462: # Subroutine that generates code for spline $label based on stored information
463: #
464:
465: sub generate_spline {
466: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
467: my $result='';
468: my $order=$Apache::functionplotresponse::splineorder{$label};
469: my $x=$Apache::functionplotresponse::splineinitx{$label};
470: my $y=$Apache::functionplotresponse::splineinity{$label};
471: my $sx=$Apache::functionplotresponse::splinescalex{$label};
472: my $sy=$Apache::functionplotresponse::splinescaley{$label};
473: my @coords=();
474: foreach my $i (1..$order) {
475: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
476: my $xp=$x;
477: $x+=$sx/(2.*($order-1));
478: push(@coords,$label.'P'.$i);
479: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
480: $x+=$sx/(2.*($order-1));
481: push(@coords,$label.'S'.$i);
482: }
483: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
484: return $result;
485: }
486:
487: #
488: # Object
489: #
490:
491: sub start_plotobject {
492: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
493: my $result='';
494: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
495: my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval);
496: my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval);
497: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
498: $label=~s/\W//gs;
499: $label=ucfirst($label);
500: unless ($label) { $label="NewObject"; }
501: if ($target eq 'web') {
502: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
503: unless (defined($x)) { $x=$xmin; }
504: unless (defined($y)) { $y=$ymin; }
505: $result.=&plotobject_script($internalid,$label,$x,$y);
506: } elsif ($target eq 'edit') {
507: $result=&Apache::edit::tag_start($target,$token,'Plot Object').
508: &Apache::edit::text_arg('Label on Plot:','label',
509: $token,'16').
510: &Apache::edit::text_arg('x:','x',
511: $token,'8').
512: &Apache::edit::text_arg('y:','y',
513: $token,'8').
514: &Apache::edit::end_row();
515: } elsif ($target eq 'modified') {
516: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
517: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','x','y');
518: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
519: }
520: return $result;
521: }
522:
523: sub end_plotobject {
524: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
525: my $result='';
526: if ($target eq 'edit') {
527: $result=&Apache::edit::end_table();
528: }
529: return $result;
530: }
531:
532: #
533: # Vector
534: #
535:
536: sub start_plotvector {
537: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
538: my $result='';
539: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
540: my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval);
541: my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval);
542: my $tipx=&Apache::lonxml::get_param('tipx',$parstack,$safeeval);
543: my $tipy=&Apache::lonxml::get_param('tipy',$parstack,$safeeval);
544:
545: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
546: $label=~s/\W//gs;
547: $label=ucfirst($label);
548: unless ($label) { $label="NewVector"; }
549: if ($target eq 'web') {
550: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
551: unless (defined($tailx)) { $tailx=$xmin; }
552: unless (defined($taily)) { $taily=$ymin; }
553: unless (defined($tipx)) { $tipx=$xmin; }
554: unless (defined($tipy)) { $tipy=$ymin; }
555: $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy,$xmin,$xmax);
556: } elsif ($target eq 'edit') {
557: $result=&Apache::edit::tag_start($target,$token,'Plot Vector').
558: &Apache::edit::text_arg('Label on Plot:','label',
559: $token,'16').
560: &Apache::edit::text_arg('Tail x:','tailx',
561: $token,'8').
562: &Apache::edit::text_arg('Tail y:','taily',
563: $token,'8').
564: &Apache::edit::text_arg('Tip x:','tipx',
565: $token,'8').
566: &Apache::edit::text_arg('Tip y:','tipy',
567: $token,'8').
568:
569: &Apache::edit::end_row();
570: } elsif ($target eq 'modified') {
571: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
572: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','tipx','tipy');
573: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
574: }
575: return $result;
576: }
577:
578: sub end_plotvector {
579: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
580: my $result='';
581: if ($target eq 'edit') {
582: $result=&Apache::edit::end_table();
583: }
584: return $result;
585: }
586:
587:
588:
589: #
590: # <backgroundplot function="..." fixed="yes/no" />
591: #
592: sub start_backgroundplot {
593: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
594: my $result='';
595: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
596: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
597: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
598: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
599: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
600: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
601: $color=~s/[^a-fA-F0-9]//gs;
602: unless (length($color)==6) { $color=''; }
603: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
604:
605: unless ($function) { $function="0"; }
606: if ($target eq 'web') {
607: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
608: unless (defined($xinitial)) { $xinitial=$xmin; }
609: unless (defined($xfinal)) { $xfinal=$xmax; }
610: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
611: } elsif ($target eq 'edit') {
612: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
613: &Apache::edit::text_arg('Function:','function',
614: $token,'16').
615: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
616: $token,'8').
617: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
618: $token,'8').
619: &Apache::edit::text_arg('Label on Plot:','label',
620: $token,'8').
621: &Apache::edit::text_arg('Color (hex code):','color',
622: $token,'8').
623: &Apache::edit::select_arg('Fixed location:','fixed',
624: ['yes','no'],$token).
625: &Apache::edit::end_row();
626: } elsif ($target eq 'modified') {
627: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
628: $safeeval,'function','label','xinitial','xfinal','color','fixed');
629: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
630: }
631: return $result;
632: }
633:
634: sub end_backgroundplot {
635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
636: my $result='';
637: if ($target eq 'edit') {
638: $result=&Apache::edit::end_table();
639: }
640: return $result;
641: }
642:
643: #
644: # <functionplotrule ... />
645: #
646: sub start_functionplotrule {
647: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
648: my $result='';
649: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
650: $Apache::functionplotresponse::counter++;
651: if ($label=~/\W/) {
652: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
653: }
654: $label=~s/\W//gs;
655: unless ($label) {
656: $label='R'.$Apache::functionplotresponse::counter;
657: } else {
658: $label='R'.$label;
659: }
660:
661: if ($target eq 'grade') {
662: # Simply remember - in order - for later
663: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
664: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
665: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
666: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
667: }
668: $beginninglabel=~s/\W//gs;
669: $endinglabel=~s/\W//gs;
670: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
671: $relationship=~s/\W//gs;
672: $relationship=lc($relationship);
673: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
674: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
675: $relationship='eq';
676: }
677: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
678: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
679: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
680: $derivative=0;
681: }
682: push(@Apache::functionplotresponse::functionplotrules,join(':',(
683: $label,
684: $derivative,
685: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
686: $beginninglabel,
687: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
688: $endinglabel,
689: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
690: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
691: $relationship,
692: &Apache::lonxml::get_param('value',$parstack,$safeeval),
693: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
694: )));
695: } elsif ($target eq 'edit') {
696: $result=&Apache::edit::tag_start($target,$token,'Function Plot Graph Rule').
697: &Apache::edit::text_arg('Index/Name:','index',
698: $token,'10').' '.
699: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
700: [['0','Function itself'],
701: ['1','First derivative'],
702: ['2','Second derivative'],
703: ['-1','Integral']],$token).'<br />'.
704: &Apache::edit::text_arg('Initial x-value:','xinitial',
705: $token,'8').
706: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
707: [['start','Start of Plot'],
708: ['end','End of Plot']],$token,'8').'<br />'.
709:
710: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
711: $token,'8').
712: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
713: [['end','End of Plot']],$token,'8').'<br />'.
714: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
715: $token,'8').
716: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
717: $token,'8').'<br />'.
718: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
719: [['eq','equal'],
720: ['ne','not equal'],
721: ['ge','greater than or equal'],
722: ['gt','greater than'],
723: ['lt','less than'],
724: ['le','less than or equal']],$token).
725: $result.= &Apache::edit::select_or_text_arg('Value:','value',
726: [['undef','not defined']],$token,'30').
727: &Apache::edit::text_arg('Percent error:','percenterror',
728: $token,'8').
729: &Apache::edit::end_row();
730: } elsif ($target eq 'modified') {
731: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
732: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
733: }
734: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
735: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
736: }
737: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
738: $safeeval,'index','derivativeorder',
739: 'xinitial','xinitiallabel','xfinal','xfinallabel',
740: 'minimumlength','maximumlength',
741: 'relationship','value','percenterror');
742: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
743: }
744: return $result;
745: }
746:
747: sub end_functionplotrule {
748: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
749: my $result='';
750: if ($target eq 'edit') {
751: $result=&Apache::edit::end_table();
752: }
753: return $result;
754: }
755:
756:
757: #
758: # <functionplotvectorrule ... />
759: #
760: sub start_functionplotvectorrule {
761: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
762: my $result='';
763: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
764: $Apache::functionplotresponse::counter++;
765: if ($label=~/\W/) {
766: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
767: }
768: $label=~s/\W//gs;
769: unless ($label) {
770: $label='R'.$Apache::functionplotresponse::counter;
771: } else {
772: $label='R'.$label;
773: }
774:
775: if ($target eq 'grade') {
776: # Simply remember - in order - for later
777:
778: my $id=$Apache::inputtags::response[-1];
779: my $partid=$Apache::inputtags::part;
780: my $internalid = $partid.'_'.$id;
781:
782: my $vector=&Apache::lonxml::get_param('vector',$parstack,$safeeval);
783: $vector=~s/\W//gs;
784: $vector=ucfirst($vector);
785:
786: my $attachpoint=&Apache::lonxml::get_param('attachpoint',$parstack,$safeeval);
787: $attachpoint=~s/\W//gs;
788: $attachpoint=ucfirst($attachpoint);
789:
790: my $notattachpoint=&Apache::lonxml::get_param('notattachpoint',$parstack,$safeeval);
791: $notattachpoint=~s/\W//gs;
792: $notattachpoint=ucfirst($notattachpoint);
793:
794: my $tailpoint=&Apache::lonxml::get_param('tailpoint',$parstack,$safeeval);
795: $tailpoint=~s/\W//gs;
796: $tailpoint=ucfirst($tailpoint);
797: my $tippoint=&Apache::lonxml::get_param('tippoint',$parstack,$safeeval);
798: $tippoint=~s/\W//gs;
799: $tippoint=ucfirst($tippoint);
800:
801: my $nottailpoint=&Apache::lonxml::get_param('nottailpoint',$parstack,$safeeval);
802: $nottailpoint=~s/\W//gs;
803: $nottailpoint=ucfirst($nottailpoint);
804: my $nottippoint=&Apache::lonxml::get_param('nottippoint',$parstack,$safeeval);
805: $nottippoint=~s/\W//gs;
806: $nottippoint=ucfirst($nottippoint);
807:
808: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
809: $label,
810: 'vector',
811: $internalid,
812: $vector,
813: $attachpoint,
814: $notattachpoint,
815: $tailpoint,
816: $tippoint,
817: $nottailpoint,
818: $nottippoint,
819: &Apache::lonxml::get_param('length',$parstack,$safeeval),
820: &Apache::lonxml::get_param('angle',$parstack,$safeeval),
821: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval),
822: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval),
823: )));
824: } elsif ($target eq 'edit') {
825: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Rule').
826: &Apache::edit::text_arg('Index/Name:','index',
827: $token,'10').' '.
828: &Apache::edit::text_arg('Vector:','vector',
829: $token,'16').'<br />'.
830: &Apache::edit::text_arg('Attached to object:','attachpoint',
831: $token,'16').
832: &Apache::edit::text_arg('Not attached to object:','notattachpoint',
833: $token,'16').'<br />'.
834: &Apache::edit::text_arg('Tail attached to object:','tailpoint',
835: $token,'16').
836: &Apache::edit::text_arg('Tip attached to object:','tippoint',
837: $token,'16').
838: &Apache::edit::text_arg('Tail not attached to object:','nottailpoint',
839: $token,'16').
840: &Apache::edit::text_arg('Tip not attached to object:','nottippoint',
841: $token,'16').'<br />'.
842: &Apache::edit::text_arg('Length:','length',
843: $token,'30').
844: &Apache::edit::text_arg('Absolute error length:','lengtherror',
845: $token,'8').'<br />'.
846: &Apache::edit::text_arg('Angle:','angle',
847: $token,'30').
848: &Apache::edit::text_arg('Absolute error angle:','angleerror',
849: $token,'8').
850: &Apache::edit::end_row();
851: } elsif ($target eq 'modified') {
852: $env{'form.'.&Apache::edit::html_element_name('vector')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('vector')});
853: $env{'form.'.&Apache::edit::html_element_name('attachpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('attachpoint')});
854: $env{'form.'.&Apache::edit::html_element_name('notattachpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('notattachpoint')});
855: $env{'form.'.&Apache::edit::html_element_name('tailpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('tailpoint')});
856: $env{'form.'.&Apache::edit::html_element_name('tippoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('tippoint')});
857: $env{'form.'.&Apache::edit::html_element_name('nottailpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('nottailpoint')});
858: $env{'form.'.&Apache::edit::html_element_name('nottippoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('nottippoint')});
859: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
860: $safeeval,'index','vector','attachpoint','notattachpoint',
861: 'tailpoint','tippoint','nottailpoint','nottipoint',
862: 'length','angle',
863: 'lengtherror','angleerror');
864: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
865: }
866: return $result;
867: }
868:
869: sub end_functionplotvectorrule {
870: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
871: my $result='';
872: if ($target eq 'edit') {
873: $result=&Apache::edit::end_table();
874: }
875: return $result;
876: }
877:
878: #
879: # <functionplotvectorsumrule ... />
880: #
881: sub start_functionplotvectorsumrule {
882: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
883: my $result='';
884: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
885: $Apache::functionplotresponse::counter++;
886: if ($label=~/\W/) {
887: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
888: }
889: $label=~s/\W//gs;
890: unless ($label) {
891: $label='R'.$Apache::functionplotresponse::counter;
892: } else {
893: $label='R'.$label;
894: }
895: if ($target eq 'grade') {
896: # Simply remember - in order - for later
897: my $id=$Apache::inputtags::response[-1];
898: my $partid=$Apache::inputtags::part;
899: my $internalid = $partid.'_'.$id;
900: my $vectors=&Apache::lonxml::get_param('vectors',$parstack,$safeeval);
901: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
902: $label,
903: 'sum',
904: $internalid,
905: $vectors,
906: &Apache::lonxml::get_param('length',$parstack,$safeeval),
907: &Apache::lonxml::get_param('angle',$parstack,$safeeval),
908: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval),
909: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval),
910: )));
911: } elsif ($target eq 'edit') {
912: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Sum Rule').
913: &Apache::edit::text_arg('Index/Name:','index',
914: $token,'10').' '.
915: &Apache::edit::text_arg('Comma-separated list of vectors:','vectors',
916: $token,'30').'<br />'.
917: &Apache::edit::text_arg('Sum vector length:','length',
918: $token,'30').
919: &Apache::edit::text_arg('Absolute error length:','lengtherror',
920: $token,'8').'<br />'.
921: &Apache::edit::text_arg('Sum vector angle:','angle',
922: $token,'30').
923: &Apache::edit::text_arg('Absolute error angle:','angleerror',
924: $token,'8').
925: &Apache::edit::end_row();
926: } elsif ($target eq 'modified') {
927: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
928: $safeeval,'index','vectors',
929: 'length','angle',
930: 'lengtherror','angleerror');
931: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
932: }
933: return $result;
934: }
935:
936: sub end_functionplotvectorsumrule {
937: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
938: my $result='';
939: if ($target eq 'edit') {
940: $result=&Apache::edit::end_table();
941: }
942: return $result;
943: }
944:
945: #
946: # <functionplotcustom ... />
947: #
948: sub start_functionplotcustomrule {
949: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
950: my $result='';
951: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
952: $Apache::functionplotresponse::counter++;
953: if ($label=~/\W/) {
954: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
955: }
956: $label=~s/\W//gs;
957: unless ($label) {
958: $label='R'.$Apache::functionplotresponse::counter;
959: } else {
960: $label='R'.$label;
961: }
962: &Apache::lonxml::register('Apache::response',('answer'));
963: if ($target eq 'edit') {
964: $result=&Apache::edit::tag_start($target,$token,'Function Plot Custom Rule').
965: &Apache::edit::text_arg('Index/Name:','index',$token,'10').
966: &Apache::edit::end_row();
967: } elsif ($target eq 'modified') {
968: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'index');
969: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
970: }
971: return $result;
972: }
973:
974: sub end_functionplotcustomrule {
975: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
976: my $result='';
977: if ($target eq 'edit') {
978: $result=&Apache::edit::end_table();
979: } elsif ($target eq 'grade') {
980: # Simply remember - in order - for later
981: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
982: $Apache::functionplotresponse::counter++;
983: if ($label=~/\W/) {
984: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
985: }
986: $label=~s/\W//gs;
987: unless ($label) {
988: $label='R'.$Apache::functionplotresponse::counter;
989: } else {
990: $label='R'.$label;
991: }
992: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
993: $label,
994: 'custom',
995: &escape($Apache::response::custom_answer[-1])
996: )));
997: }
998: &Apache::lonxml::deregister('Apache::response',('answer'));
999: return $result;
1000: }
1001:
1002:
1003:
1004: #
1005: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1006: #
1007: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
1008: #
1009: sub start_spline {
1010: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1011: my $result='';
1012: if ($target eq 'web') {
1013: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1014: $Apache::functionplotresponse::counter++;
1015: if ($label=~/\W/) {
1016: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1017: }
1018: $label=~s/\W//gs;
1019: unless ($label) {
1020: $label='S'.$Apache::functionplotresponse::counter;
1021: } else {
1022: $label='S'.$label;
1023: }
1024: if ($Apache::functionplotresponse::splineorder{$label}) {
1025: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1026: }
1027:
1028: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
1029: if ($order<2) { $order=2; }
1030: if ($order>8) { $order=8; }
1031: $Apache::functionplotresponse::splineorder{$label}=$order;
1032:
1033: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
1034: unless ($x) { $x=0; }
1035: $Apache::functionplotresponse::splineinitx{$label}=$x;
1036:
1037: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
1038: unless ($y) { $y=0; }
1039: $Apache::functionplotresponse::splineinity{$label}=$y;
1040:
1041: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
1042: unless ($sx) { $sx=$order; }
1043: $Apache::functionplotresponse::splinescalex{$label}=$sx;
1044:
1045: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
1046: unless ($sy) { $sy=2; }
1047: $Apache::functionplotresponse::splinescaley{$label}=$sy;
1048: } elsif ($target eq 'edit') {
1049: $result=&Apache::edit::tag_start($target,$token,'Spline').
1050: &Apache::edit::text_arg('Index:','index',
1051: $token,'4').' '.
1052: &Apache::edit::select_arg('Order:','order',
1053: ['2','3','4','5','6','7','8'],$token).' '.
1054: &Apache::edit::text_arg('Initial x-value:','initx',
1055: $token,'4').' '.
1056: &Apache::edit::text_arg('Initial y-value:','inity',
1057: $token,'4').' '.
1058: &Apache::edit::text_arg('Scale x:','scalex',
1059: $token,'4').' '.
1060: &Apache::edit::text_arg('Scale y:','scaley',
1061: $token,'4').
1062: &Apache::edit::end_row();
1063: } elsif ($target eq 'modified') {
1064: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1065: $safeeval,'index','order','initx','inity',
1066: 'scalex','scaley');
1067: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1068: }
1069: return $result;
1070: }
1071:
1072: sub end_spline {
1073: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1074: my $result='';
1075: if ($target eq 'edit') {
1076: $result=&Apache::edit::end_table();
1077: }
1078: return $result;
1079: }
1080:
1081: sub end_init_script {
1082: return (<<ENDENDINIT);
1083: }
1084: // ]]>
1085: </script>
1086: ENDENDINIT
1087: }
1088:
1089: #
1090: # Storing and restoring spline coordinates from part answers
1091: #
1092: sub decode_previous_answer {
1093: my ($answer)=@_;
1094: foreach my $coordinate (split(/\,/,$answer)) {
1095: my ($key,$value)=split(/\=/,$coordinate);
1096: $Apache::functionplotresponse::previous{$key}=$value;
1097: }
1098: }
1099:
1100: sub get_answer_from_form_fields {
1101: my ($id)=@_;
1102: my $answer='';
1103: my %coords=();
1104: foreach my $field (keys(%env)) {
1105: if ($field=~/^form\.HWVAL\_$id/) {
1106: $field=~/^form\.(.*)$/;
1107: $coords{$1}=$env{$field};
1108: }
1109: }
1110: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
1111: return ($answer,%coords);
1112: }
1113:
1114: #
1115: # The following functions calculate the cubic-hermite splines server-side
1116: #
1117:
1118: sub cubic_hermite {
1119: my ($t,$p1,$s1,$p2,$s2)=@_;
1120: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
1121: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1122: }
1123:
1124: #
1125: # d/dt(...)
1126: #
1127:
1128: sub ddt_cubic_hermite {
1129: my ($t,$p1,$s1,$p2,$s2)=@_;
1130: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
1131: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1132: }
1133:
1134: #
1135: # d^2/dt^2(...)
1136: #
1137:
1138: sub d2dt2_cubic_hermite {
1139: my ($t,$p1,$s1,$p2,$s2)=@_;
1140: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
1141: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1142: }
1143:
1144: #
1145: # Array index calculation
1146: #
1147: sub array_index {
1148: my ($xmin,$xmax,$x)=@_;
1149: if ($x ne '') {
1150: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
1151: } else {
1152: return undef;
1153: }
1154: }
1155:
1156: #
1157: # Populate the arrays
1158: #
1159:
1160: sub populate_arrays {
1161: my ($id,$xmin,$xmax,$ymin,$ymax)=@_;
1162: for (my $i=0; $i<=400; $i++) {
1163: $Apache::functionplotresponse::actualxval[$i]=undef;
1164: $Apache::functionplotresponse::func[$i]=undef;
1165: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1166: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1167: }
1168: unless ($xmax>$xmin) { return 'no_func'; }
1169: # Run over all splines in response
1170: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1171: my $xiold=-1;
1172: # Run over all points in spline
1173: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1174: my $ni=$i+1;
1175: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
1176: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
1177: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
1178: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
1179: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
1180: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
1181: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
1182: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
1183: # Run in small steps over spline parameter
1184: for (my $t=0; $t<=1; $t+=0.0001) {
1185: my $xreal=&cubic_hermite($t,@xparms);
1186: my $xi=&array_index($xmin,$xmax,$xreal);
1187: if ($xi<$xiold) { return 'no_func'; }
1188: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1189: $xiold=$xi;
1190: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1191: # Function value
1192: my $funcval=&cubic_hermite($t,@yparms);
1193:
1194: # Do we already have a value for this point, and is it different from the new one?
1195: if ((defined($Apache::functionplotresponse::func[$xi])) &&
1196: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) {
1197: return 'no_func';
1198: }
1199: # Okay, remember the new point
1200: $Apache::functionplotresponse::func[$xi]=$funcval;
1201:
1202: if (defined($funcval)) {
1203: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
1204: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
1205: }
1206: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
1207: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
1208: }
1209: }
1210: # Chain rule
1211: # dy/dx=dy/dt/(dx/dt)
1212: my $dxdt=&ddt_cubic_hermite($t,@xparms);
1213: if ($dxdt) {
1214: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1215: # Second derivative
1216: $Apache::functionplotresponse::d2funcdx2[$xi]=
1217: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
1218: ($dxdt*$dxdt*$dxdt);
1219: }
1220: }
1221: }
1222: }
1223: }
1224: }
1225:
1226: #
1227: # Implementation of <functionplotresponse>
1228: #
1229:
1230: sub start_functionplotresponse {
1231: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1232: my $result='';
1233: # To remember the splines - somehow, they need to come last
1234: undef %Apache::functionplotresponse::splineorder;
1235: undef %Apache::functionplotresponse::splineinitx;
1236: undef %Apache::functionplotresponse::splineinity;
1237: undef %Apache::functionplotresponse::splinescalex;
1238: undef %Apache::functionplotresponse::splinescaley;
1239: # Remember input fields, etc
1240: undef %Apache::functionplotresponse::previous;
1241: $Apache::functionplotresponse::inputfields='';
1242: $Apache::functionplotresponse::counter=0;
1243: # Remember rules
1244: undef @Apache::functionplotresponse::functionplotrules;
1245: undef @Apache::functionplotresponse::functionplotvectorrules;
1246: # Remember failed rules
1247: if ($target eq 'grade') {
1248: undef @Apache::functionplotresponse::failedrules;
1249: }
1250: # Delete previous awards
1251: undef $Apache::functionplotresponse::awarddetail;
1252: # Part and ID
1253: my $partid=$Apache::inputtags::part;
1254: my $id=&Apache::response::start_response($parstack,$safeeval);
1255: # Internal ID to mark the applet and its coordinates
1256: my $internalid = $partid.'_'.$id;
1257: # Previous answer
1258: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
1259:
1260: # Parameters of <functionplotresponse>
1261: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1262: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1263: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1264: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1265: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
1266: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1267: if ($target eq 'edit') {
1268: $result.=&Apache::edit::start_table($token)
1269: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
1270: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1271: .&Apache::edit::deletelist($target,$token).' '
1272: .&Apache::edit::insertlist($target,$token).' '
1273: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1274: .'</span></td>'
1275: ."<td> "
1276: .&Apache::edit::end_row()
1277: .&Apache::edit::start_spanning_row()
1278: ."\n";
1279: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
1280: $token,'6').' '.
1281: &Apache::edit::text_arg('Minimum x-value:','xmin',
1282: $token,'4').' '.
1283: &Apache::edit::text_arg('Maximum x-value:','xmax',
1284: $token,'4').' '.
1285: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1286: ['yes','no'],$token).'<br />'.
1287: &Apache::edit::text_arg('Label y-axis:','ylabel',
1288: $token,'6').' '.
1289: &Apache::edit::text_arg('Minimum y-value:','ymin',
1290: $token,'4').' '.
1291: &Apache::edit::text_arg('Maximum y-value:','ymax',
1292: $token,'4').' '.
1293: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1294: ['yes','no'],$token).'<br />'.
1295: &Apache::edit::select_arg('Grid visible:','gridvisible',
1296: ['yes','no'],$token).'<br />'.
1297: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1298: 'answerdisplay',$token,'50').
1299: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1300: } elsif ($target eq 'modified') {
1301: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1302: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1303: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1304: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1305:
1306: } elsif ($target eq 'meta') {
1307: $result=&Apache::response::meta_package_write('functionplotresponse');
1308: } elsif (($target eq 'answer') &&
1309: ($env{'form.answer_output_mode'} ne 'tex') &&
1310: ($Apache::lonhomework::viewgrades == 'F')) {
1311: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
1312: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
1313: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
1314: {'only_body' => 1,
1315: 'bgcolor' => '#FFFFFF',
1316: 'js_ready' => 1,});
1317: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
1318: $uname =~s/\W//g;
1319: $udom =~s/\W//g;
1320: my $function_name =
1321: join('_','LONCAPA_scriptvars',$uname,$udom,
1322: $env{'form.counter'},$Apache::lonxml::curdepth);
1323: my $rules_var ="<script type=\"text/javascript\">
1324: // <![CDATA[
1325: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
1326: $Apache::functionplotresponse::ruleslog.
1327: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
1328: // ]]>
1329: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
1330: &Apache::lonxml::add_script_result($rules_var);
1331: }
1332:
1333: return $result;
1334: }
1335:
1336: sub compare_rel {
1337: my ($relationship,$value,$realval,$tol)=@_;
1338: # is the real value undefined?
1339: unless (defined($realval)) {
1340: # the real value is not defined
1341: if ($relationship eq 'eq') {
1342: if ($value eq 'undef') {
1343: return 1;
1344: } else {
1345: return 0;
1346: }
1347: } elsif ($relationship eq 'ne') {
1348: if ($value eq 'undef') {
1349: return 0;
1350: } else {
1351: return 1;
1352: }
1353: } else {
1354: return 0;
1355: }
1356: }
1357:
1358: # is the expected value undefined?
1359: if ($value eq 'undef') {
1360: # but by now we know that the real value is defined
1361: return 0;
1362: }
1363:
1364: # both are defined.
1365: if ($relationship eq 'gt') {
1366: return ($realval>$value);
1367: } elsif ($relationship eq 'ge') {
1368: return ($realval>$value-$tol);
1369: } elsif ($relationship eq 'lt') {
1370: return ($realval<$value);
1371: } elsif ($relationship eq 'le') {
1372: return ($realval<$value+$tol);
1373: } elsif ($relationship eq 'ne') {
1374: return (abs($value-$realval)>$tol);
1375: } else {
1376: return (abs($value-$realval)<$tol);
1377: }
1378: return 0;
1379: }
1380:
1381: sub addlog {
1382: my ($text)=@_;
1383: $text=~s/\'/\\\'/g;
1384: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
1385: }
1386:
1387: sub actualval {
1388: my ($i,$xmin,$xmax)=@_;
1389: return $xmin+$i/400.*($xmax-$xmin);
1390: }
1391:
1392: sub fpr_val {
1393: my ($arg)=@_;
1394: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg},
1395: $Apache::functionplotresponse::fpr_xmin,
1396: $Apache::functionplotresponse::fpr_xmax);
1397: }
1398:
1399: sub fpr_f {
1400: my ($arg)=@_;
1401: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin,
1402: $Apache::functionplotresponse::fpr_xmax,
1403: $arg)];
1404: }
1405:
1406: sub fpr_dfdx {
1407: my ($arg)=@_;
1408: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin,
1409: $Apache::functionplotresponse::fpr_xmax,
1410: $arg)];
1411: }
1412:
1413: sub fpr_d2fdx2 {
1414: my ($arg)=@_;
1415: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin,
1416: $Apache::functionplotresponse::fpr_xmax,
1417: $arg)];
1418: }
1419:
1420: sub fpr_vectorcoords {
1421: my ($arg)=@_;
1422: $arg=~s/\W//gs;
1423: $arg=ucfirst($arg);
1424: my $id=$Apache::inputtags::response[-1];
1425: my $partid=$Apache::inputtags::part;
1426: my $internalid = $partid.'_'.$id;
1427: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_x'},
1428: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_x'},
1429: $env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_y'},
1430: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_y'});
1431: }
1432:
1433: sub fpr_objectcoords {
1434: my ($arg)=@_;
1435: $arg=~s/\W//gs;
1436: $arg=ucfirst($arg);
1437: my $id=$Apache::inputtags::response[-1];
1438: my $partid=$Apache::inputtags::part;
1439: my $internalid = $partid.'_'.$id;
1440: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'_x'},
1441: $env{'form.HWVAL_'.$internalid.'_'.$arg.'_y'});
1442: }
1443:
1444: sub fpr_vectorlength {
1445: my ($arg)=@_;
1446: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg);
1447: return sqrt(($xe-$xs)*($xe-$xs)+($ye-$ys)*($ye-$ys));
1448: }
1449:
1450: sub fpr_vectorangle {
1451: my ($arg)=@_;
1452: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg);
1453: my $angle=57.2957795*atan2(($ye-$ys),($xe-$xs));
1454: if ($angle<0) { $angle=360+$angle; }
1455: return $angle;
1456: }
1457:
1458: sub vectorcoords {
1459: my ($id,$label)=@_;
1460: return ($env{'form.HWVAL_'.$id.'_'.$label.'Start_x'},
1461: $env{'form.HWVAL_'.$id.'_'.$label.'End_x'},
1462: $env{'form.HWVAL_'.$id.'_'.$label.'Start_y'},
1463: $env{'form.HWVAL_'.$id.'_'.$label.'End_y'});
1464: }
1465:
1466: sub objectcoords {
1467: my ($id,$label)=@_;
1468: return ($env{'form.HWVAL_'.$id.'_'.$label.'_x'},
1469: $env{'form.HWVAL_'.$id.'_'.$label.'_y'});
1470: }
1471:
1472: sub attached {
1473: my ($id,$vector,$object,$xmin,$xmax,$ymin,$ymax)=@_;
1474: my ($xs,$xe,$ys,$ye)=&vectorcoords($id,$vector);
1475: my ($xo,$yo)=&objectcoords($id,$object);
1476: my $tolx=($xmax-$xmin)/100.;
1477: my $toly=($ymax-$ymin)/100.;
1478: my $tail=0;
1479: my $tip=0;
1480: &addlog("Proximity $vector ($xs,$xe,$ys,$ye) to $object ($xo,$yo)");
1481: if ((abs($xs-$xo)<$tolx) && (abs($ys-$yo)<$toly)) { $tail=1; }
1482: if ((abs($xe-$xo)<$tolx) && (abs($ye-$yo)<$toly)) { $tip=1; }
1483: &addlog("Result tail:$tail tip:$tip");
1484: return($tail,$tip);
1485: }
1486:
1487:
1488: sub vectorangle {
1489: my ($x,$y)=@_;
1490: my $angle=57.2957795*atan2($y,$x);
1491: if ($angle<0) { $angle=360+$angle; }
1492: return $angle;
1493: }
1494:
1495: sub vectorlength {
1496: my ($x,$y)=@_;
1497: return sqrt($x*$x+$y*$y);
1498: }
1499:
1500: sub relvector {
1501: my ($xs,$xe,$ys,$ye)=@_;
1502: return ($xe-$xs,$ye-$ys);
1503: }
1504:
1505: sub plotvectorlength {
1506: return &vectorlength(&relvector(&vectorcoords(@_)));
1507: }
1508:
1509: sub plotvectorangle {
1510: return &vectorangle(&relvector(&vectorcoords(@_)));
1511: }
1512:
1513:
1514: #
1515: # Evaluate a functionplotvectorrule
1516: #
1517:
1518: sub functionplotvectorrulecheck {
1519: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1520: &addlog("=================");
1521: my ($label,$type)=split(/\:/,$rule);
1522: if ($type eq 'vector') {
1523: return &vectorcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
1524: } elsif ($type eq 'sum') {
1525: return &sumcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
1526: } elsif ($type eq 'custom') {
1527: return &customcheck($rule,$safeeval);
1528: }
1529: }
1530:
1531: sub vectorcheck {
1532: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1533: my ($label,$type,$id,$vector,
1534: $attachpoint,$notattachpoint,
1535: $tailpoint,$tippoint,$nottailpoint,$nottippoint,
1536: $length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule);
1537: &addlog("Vector Rule $label for vector ".$vector);
1538: if ($length ne '') {
1539: &addlog("Checking for length $length with error $lengtherror");
1540: $length=&Apache::run::run($length,$safeeval);
1541: &addlog("Length evaluated to $length");
1542: my $thislength=&plotvectorlength($id,$vector);
1543: &addlog("Found length $thislength");
1544: if (abs($thislength-$length)>$lengtherror) {
1545: &setfailed($label);
1546: return 0;
1547: }
1548: }
1549: if ($angle ne '') {
1550: &addlog("Checking for angle $angle with error $angleerror");
1551: $angle=&Apache::run::run($angle,$safeeval);
1552: &addlog("Angle evaluated to $angle");
1553: my $thisangle=&plotvectorangle($id,$vector);
1554: &addlog("Found angle $thisangle");
1555: my $anglediff=abs($thisangle-$angle);
1556: &addlog("Angle difference: $anglediff");
1557: if ($anglediff>360.-$anglediff) {
1558: $anglediff=360.-$anglediff;
1559: }
1560: &addlog("Smallest angle difference: $anglediff");
1561: if ($anglediff>$angleerror) {
1562: &setfailed($label);
1563: return 0;
1564: }
1565: }
1566: if ($attachpoint ne '') {
1567: &addlog("Checking attached: ".$attachpoint);
1568: my ($tail,$tip)=&attached($id,$vector,$attachpoint,$xmin,$xmax,$ymin,$ymax);
1569: unless ($tail || $tip) {
1570: &setfailed($label);
1571: return 0;
1572: }
1573: }
1574: if ($notattachpoint ne '') {
1575: &addlog("Checking not attached: ".$notattachpoint);
1576: my ($tail,$tip)=&attached($id,$vector,$notattachpoint,$xmin,$xmax,$ymin,$ymax);
1577: if ($tail || $tip) {
1578: &setfailed($label);
1579: return 0;
1580: }
1581: }
1582: if ($tailpoint ne '') {
1583: &addlog("Checking tail: ".$tailpoint);
1584: my ($tail,$tip)=&attached($id,$vector,$tailpoint,$xmin,$xmax,$ymin,$ymax);
1585: unless ($tail) {
1586: &setfailed($label);
1587: return 0;
1588: }
1589: }
1590: if ($nottailpoint ne '') {
1591: &addlog("Checking not tail: ".$nottailpoint);
1592: my ($tail,$tip)=&attached($id,$vector,$nottailpoint,$xmin,$xmax,$ymin,$ymax);
1593: if ($tail) {
1594: &setfailed($label);
1595: return 0;
1596: }
1597: }
1598: if ($tippoint ne '') {
1599: &addlog("Checking tip: ".$tippoint);
1600: my ($tail,$tip)=&attached($id,$vector,$tippoint,$xmin,$xmax,$ymin,$ymax);
1601: unless ($tip) {
1602: &setfailed($label);
1603: return 0;
1604: }
1605: }
1606: if ($nottippoint ne '') {
1607: &addlog("Checking not tip: ".$nottippoint);
1608: my ($tail,$tip)=&attached($id,$vector,$nottippoint,$xmin,$xmax,$ymin,$ymax);
1609: if ($tip) {
1610: &setfailed($label);
1611: return 0;
1612: }
1613: }
1614:
1615: &addlog("Rule $label passed.");
1616: return 1;
1617: }
1618:
1619: sub sumcheck {
1620: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1621: my ($label,$type,$id,$vectors,$length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule);
1622: &addlog("Vector Sum Rule $label for vectors ".$vectors);
1623: my $sumx=0;
1624: my $sumy=0;
1625: foreach my $sv (split(/\s*\,\s*/,$vectors)) {
1626: my ($rx,$ry)=&relvector(&vectorcoords($id,$sv));
1627: $sumx+=$rx;
1628: $sumy+=$ry;
1629: }
1630: &addlog("Sum vector ($sumx,$sumy)");
1631: if ($length ne '') {
1632: &addlog("Checking length $length with error $lengtherror");
1633: $length=&Apache::run::run($length,$safeeval);
1634: &addlog("Evaluated to $length");
1635: my $thislength=&vectorlength($sumx,$sumy);
1636: &addlog("Actual length $thislength");
1637: if (abs($length-$thislength)>$lengtherror) {
1638: &setfailed($label);
1639: return 0;
1640: }
1641: }
1642: if ($angle ne '') {
1643: &addlog("Checking angle $angle with error $angleerror");
1644: $angle=&Apache::run::run($angle,$safeeval);
1645: &addlog("Evaluated to $angle");
1646: my $thisangle=&vectorangle($sumx,$sumy);
1647: &addlog("Actual angle $thisangle");
1648: my $anglediff=abs($thisangle-$angle);
1649: &addlog("Angle difference: $anglediff");
1650: if ($anglediff>360.-$anglediff) {
1651: $anglediff=360.-$anglediff;
1652: }
1653: &addlog("Smallest angle difference: $anglediff");
1654: if ($anglediff>$angleerror) {
1655: &setfailed($label);
1656: return 0;
1657: }
1658: }
1659: &addlog("Rule $label passed.");
1660: return 1;
1661: }
1662:
1663: sub customcheck {
1664: my ($rule,$safeeval)=@_;
1665: my ($label,$type,$prg)=split(/\:/,$rule);
1666: &addlog("Custom Rule ".$label);
1667: my $result=&Apache::run::run(&unescape($prg),$safeeval);
1668: &addlog("Algorithm returned $result");
1669: unless ($result) {
1670: &setfailed($label);
1671: return 0;
1672: }
1673: &addlog("Rule $label passed.");
1674: return 1;
1675: }
1676:
1677: #
1678: # Evaluate a functionplotrule
1679: #
1680:
1681: sub functionplotrulecheck {
1682: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1683:
1684: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1685: =split(/\:/,$rule);
1686: $percent=($percent>0?$percent:5);
1687: &addlog("=================");
1688: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1689: #
1690: # Evaluate the value
1691: #
1692: if ($value=~/\D/) {
1693: $Apache::functionplotresponse::fpr_xmin=$xmin;
1694: $Apache::functionplotresponse::fpr_xmax=$xmax;
1695: $value=&Apache::run::run($value,$safeeval);
1696: &addlog("Value evaluated to $value");
1697: }
1698:
1699: #
1700: # Minimum and maximum lengths of the interval
1701: #
1702: if ((defined($minimumlength)) || (defined($maximumlength))) {
1703: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
1704: }
1705: my $li=0;
1706: my $lh=400;
1707:
1708: # Special case: the upper boundary was not defined
1709: # and needs to be set to the value where
1710: # the condition is not true anymore => set flag
1711:
1712: my $findupper=0;
1713: if (($xfinal eq '')
1714: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
1715: && ($xfinallabel)) {
1716: $findupper=1;
1717: }
1718:
1719: # if a hard value is set for the boundaries, it overrides the label
1720: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
1721: $li=&array_index($xmin,$xmax,$xinitial);
1722: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
1723: }
1724: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
1725: $lh=&array_index($xmin,$xmax,$xfinal);
1726: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1727: }
1728: # if the label is defined, use it
1729: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1730: &addlog("Using lower label $xinitiallabel");
1731: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1732: } else {
1733: $li=&array_index($xmin,$xmax,$xinitial);
1734: }
1735: unless ($findupper) {
1736: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1737: &addlog("Using upper label $xfinallabel");
1738: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1739: } else {
1740: $lh=&array_index($xmin,$xmax,$xfinal);
1741: }
1742: }
1743: # Basic sanity checks
1744: if ($li<0) { $li=0; }
1745: if ($lh>400) { $lh=400; }
1746: if (($li>$lh) || (!defined($lh))) {
1747: $lh=$li;
1748: }
1749:
1750: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1751: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1752: if ($findupper) {
1753: &addlog("Looking for label $xfinallabel");
1754: }
1755: my $tol=$percent*($ymax-$ymin)/100;
1756: if ($xmax>$xmin) {
1757: if ($derivative==2) {
1758: $tol=4.*$tol/($xmax-$xmin);
1759: } elsif ($derivative==1) {
1760: $tol=2.*$tol/($xmax-$xmin);
1761: } elsif ($derivative==-1) {
1762: $tol=$tol*($xmax-$xmin)/2.;
1763: }
1764: }
1765: my $integral=0;
1766: my $binwidth=($xmax-$xmin)/400.;
1767: if (($derivative<0) && (!$findupper)) {
1768: # definite integral, calculate over whole length
1769: &addlog("Calculating definite integral");
1770: for (my $i=$li; $i<=$lh; $i++) {
1771: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1772: }
1773: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1774: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1775: &addlog("Rule $label failed.");
1776: &setfailed($label);
1777: return 0;
1778: }
1779: } else {
1780: for (my $i=$li; $i<=$lh; $i++) {
1781: my $val;
1782: if ($derivative==2) {
1783: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1784: } elsif ($derivative==1) {
1785: $val=$Apache::functionplotresponse::dfuncdx[$i];
1786: } elsif ($derivative==-1) {
1787: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1788: $val=$integral;
1789: } else {
1790: $val=$Apache::functionplotresponse::func[$i];
1791: }
1792: unless (&compare_rel($relationship,$value,$val,$tol)) {
1793: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1794: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1795: if (($findupper) && ($i>$li)) {
1796: # Check lengths
1797: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1798: # Successfully found a new label, set it
1799: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1800: &addlog("Rule $label passed, setting label $xfinallabel");
1801: return 1;
1802: } else {
1803: &addlog("Rule $label failed.");
1804: &setfailed($label);
1805: return 0;
1806: }
1807: }
1808: }
1809: }
1810: # Corner case where this makes sense: using start or stop as defined labels
1811: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1812: &addlog("Rule $label passed.");
1813: return 1;
1814: }
1815:
1816: #
1817: # check for minimum and maximum lengths
1818: #
1819:
1820: sub checklength {
1821: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1822: unless (($minimumlength) || ($maximumlength)) { return 1; }
1823: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1824: if ($minimumlength) {
1825: if ($length<$minimumlength) {
1826: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1827: &setfailed($label);
1828: return 0;
1829: }
1830: }
1831: if ($maximumlength) {
1832: if ($length>$maximumlength) {
1833: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1834: &setfailed($label);
1835: return 0;
1836: }
1837: }
1838: return 1;
1839: }
1840:
1841: sub setfailed {
1842: my ($hintlabel)=@_;
1843: $hintlabel=~s/^R//;
1844: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1845: &addlog("Set hint condition $hintlabel");
1846: }
1847:
1848: sub start_functionplotruleset {
1849: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1850: if ($target eq 'edit') {
1851: return &Apache::edit::start_table($token).
1852: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1853: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1854: .&Apache::edit::deletelist($target,$token).' '.
1855: &Apache::edit::insertlist($target,$token).' '
1856: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1857: .'</span></td>'
1858: ."<td> "
1859: .&Apache::edit::end_row()
1860: .&Apache::edit::start_spanning_row()
1861: ."\n";
1862: }
1863: }
1864:
1865: sub end_functionplotruleset {
1866: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1867: my $id=$Apache::inputtags::response[-1];
1868: my $partid=$Apache::inputtags::part;
1869: my $internalid = $partid.'_'.$id;
1870:
1871: if ($target eq 'edit' ) {
1872: return &Apache::edit::end_table();
1873: } elsif ($target eq 'grade'
1874: && &Apache::response::submitted()
1875: && $Apache::lonhomework::type ne 'exam') {
1876: #
1877: # Actually grade
1878: #
1879: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1880:
1881: my $ad='';
1882: undef %Apache::functionplotresponse::functionplotrulelabels;
1883: $Apache::functionplotresponse::ruleslog='';
1884: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1885: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1886: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') {
1887: $ad='NOT_FUNCTION';
1888: } else {
1889: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1890: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1891: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1892: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1893:
1894: # We have a function that we can actually grade, go through the spline rules.
1895: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1896: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1897: $ad='INCORRECT';
1898: last;
1899: }
1900: }
1901: # And now go through the vector rules
1902: foreach my $rule (@Apache::functionplotresponse::functionplotvectorrules) {
1903: unless (&functionplotvectorrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1904: $ad='INCORRECT';
1905: last;
1906: }
1907: }
1908: # If it's not wrong, it's correct
1909: unless ($ad) { $ad='EXACT_ANS' };
1910: }
1911: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1912: &addlog("Assigned award detail: $ad");
1913: # Store for later to be assigned at end_functionplotresponse
1914: $Apache::functionplotresponse::awarddetail=$ad;
1915: }
1916: }
1917:
1918:
1919: sub end_functionplotresponse {
1920: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1921: &Apache::response::end_response;
1922:
1923: my $result;
1924: my $id=$Apache::inputtags::response[-1];
1925: my $partid=$Apache::inputtags::part;
1926: my $internalid = $partid.'_'.$id;
1927:
1928: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1929: if ($target eq 'grade'
1930: && &Apache::response::submitted()
1931: && $Apache::lonhomework::type eq 'exam') {
1932:
1933: &Apache::response::scored_response($partid,$id);
1934:
1935: } elsif ($target eq 'grade'
1936: && &Apache::response::submitted()
1937: && $Apache::lonhomework::type ne 'exam') {
1938: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1939: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1940: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1941: #
1942: # Assign grade
1943: #
1944: my $ad=$Apache::functionplotresponse::awarddetail;
1945: #
1946: # Store grading info
1947: #
1948: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1949: &Apache::response::handle_previous(\%previous,$ad);
1950: } elsif ($target eq 'web') {
1951: undef @Apache::functionplotresponse::failedrules;
1952: }
1953: return $result;
1954: }
1955:
1956: sub end_functionplotelements {
1957: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1958: my $result='';
1959: my $id=$Apache::inputtags::response[-1];
1960: my $partid=$Apache::inputtags::part;
1961: my $internalid = $partid.'_'.$id;
1962: if ($target eq 'edit' ) {
1963: $result=&Apache::edit::end_table();
1964: } elsif ($target eq 'web') {
1965: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1966:
1967: # Are we in show answer mode?
1968: my $showanswer=&Apache::response::show_answer();
1969: if ($showanswer) {
1970: # Render answerdisplay
1971: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1972: if ($answerdisplay=~/\S/s) {
1973: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1974: my @components=split(/\s*\:\s*/,$plot);
1975: if ($#components<3) {
1976: # Just a simple plot
1977: my ($func,$xl,$xh)=@components;
1978: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1979: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1980: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1981: } else {
1982: # This is a spline
1983: $result.=&answer_spline_script($internalid,@components);
1984: }
1985: }
1986: }
1987: }
1988: my $fixed=0;
1989: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1990: # Now is the time to render all of the stored splines
1991: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1992: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1993: }
1994: # close the init script
1995: $result.=&end_init_script();
1996: # register all splines in this response
1997: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1998: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1999: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
2000: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
2001: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
2002: }
2003: # generate the input fields
2004: $result.=$Apache::functionplotresponse::inputfields;
2005: # actually start the <applet>-tag
2006: $result.=&geogebra_startcode($internalid);
2007: # load the spline bytecode
2008: $result.=&geogebra_spline_program();
2009: # set default parameters
2010: $result.=&geogebra_default_parameters($internalid);
2011: # close the <applet>-tag
2012: $result.=&geogebra_endcode();
2013: }
2014: return $result;
2015: }
2016:
2017: sub boundaries {
2018: my ($parstack,$safeeval,$level)=@_;
2019: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
2020: $xmin=(defined($xmin)?$xmin:-10);
2021: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
2022: $xmax=(defined($xmax)?$xmax:10);
2023: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
2024: $ymin=(defined($ymin)?$ymin:-10);
2025: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
2026: $ymax=(defined($ymax)?$ymax:10);
2027: if ($xmax<=$xmin) {
2028: $xmax=$xmin+20;
2029: }
2030: if ($ymax<=$ymin) {
2031: $ymax=$ymin+20;
2032: }
2033: return ($xmin,$xmax,$ymin,$ymax);
2034: }
2035:
2036: sub start_functionplotelements {
2037: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2038: my $result='';
2039: my $id=$Apache::inputtags::response[-1];
2040: my $partid=$Apache::inputtags::part;
2041: my $internalid = $partid.'_'.$id;
2042:
2043: if ($target eq 'edit') {
2044: return &Apache::edit::start_table($token).
2045: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
2046: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
2047: .&Apache::edit::deletelist($target,$token).' '.
2048: &Apache::edit::insertlist($target,$token).' '
2049: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
2050: .'</span></td>'
2051: ."<td> "
2052: .&Apache::edit::end_row()
2053: .&Apache::edit::start_spanning_row()
2054: ."\n";
2055: } elsif ($target eq 'web') {
2056: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
2057: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2058: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2059: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2060: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
2061: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
2062:
2063:
2064: # paste in the update routine to receive stuff back from the applet
2065: $result.=&update_script($internalid);
2066: # start the initscript for this applet
2067: $result.=&start_init_script($internalid);
2068: # put the axis commands inside
2069: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
2070: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
2071: # init script is left open
2072: }
2073: return $result;
2074: }
2075:
2076: 1;
2077:
2078: __END__
2079:
2080: =head1 NAME
2081:
2082: Apache::functionplotresponse.pm;
2083:
2084: =head1 SYNOPSIS
2085:
2086: Handles tags associated with accepting function plots.
2087:
2088: This is part of the LearningOnline Network with CAPA project
2089: described at http://www.lon-capa.org.
2090:
2091: =head1 HANDLER SUBROUTINE
2092:
2093: start_functionplotresponse()
2094:
2095: =head1 OTHER SUBROUTINES
2096:
2097: =over
2098:
2099: =item end_functionplotresponse()
2100:
2101: =back
2102:
2103: =cut
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