1: # LearningOnline Network with CAPA
2: # Functionplot responses
3: #
4: # $Id: functionplotresponse.pm,v 1.92 2012/02/28 15:46:55 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,$width,$height)=@_;
53: $width=int(1.*$width);
54: $height=int(1.*$height);
55: unless ($width) { $width=700; }
56: unless ($height) { $height=400; }
57: return (<<ENDSTARTCODE);
58: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
59: codebase="/adm/geogebra/" width="$width" height="$height" MAYSCRIPT>
60: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
61: ENDSTARTCODE
62: }
63:
64: sub geogebra_endcode {
65: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
66: }
67:
68: #
69: # This is the internal GeoGebra bytecode which defines the spline functions
70: #
71: sub geogebra_spline_program {
72: return (<<ENDSPLINEPROGRAM);
73: <param name="ggbBase64" value="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"/>
74: ENDSPLINEPROGRAM
75: }
76:
77: #
78: # The standard set of parameters inside <applet>
79: #
80: sub geogebra_default_parameters {
81: my ($id)=@_;
82: return(<<ENDDEFAULTPARAMETERS);
83: <param name="image" value="/adm/lonIcons/lonanim.gif" />
84: <param name="boxborder" value="false" />
85: <param name="centerimage" value="true" />
86: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_algos.jar, geogebra_javascript.jar, geogebra_properties.jar, jlatexmath.jar, jlm_cyrillic.jar, jlm_greek.jar" />
87: <param name="cache_version" value="4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0" />
88: <param name="framePossible" value="false" />
89:
90: <param name="showResetIcon" value="false" />
91: <param name="showAnimationButton" value="false" />
92: <param name="enableRightClick" value="false" />
93: <param name="errorDialogsActive" value="true" />
94: <param name="enableLabelDrags" value="false" />
95: <param name="showMenuBar" value="false" />
96: <param name="showToolBar" value="false" />
97: <param name="showToolBarHelp" value="false" />
98: <param name="showAlgebraInput" value="false" />
99: <param name="enableShiftDragZoom" value="false" />
100: <param name="allowRescaling" value="false" />
101: <param name="enableLabelDrags" value="false" />
102: <param name="ggbOnInitParam" value="applet_$id" />
103: ENDDEFAULTPARAMETERS
104: }
105:
106: #
107: # This subroutine is called by LON-CAPA at </problem>
108: # Each applet on the page will call function ggbOnInit when it is done loading
109: # This function in turn will call the respective function registered by start_init_script
110: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
111: #
112:
113: sub init_script {
114: if ($#Apache::functionplotresponse::callscripts>=0) {
115: my $script='';
116: foreach my $id (@Apache::functionplotresponse::callscripts) {
117: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
118: }
119: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
120: ") { setTimeout('ggbInitAll()',200) }";
121: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
122: return (<<ENDGGBINIT);
123: <script type="text/javascript">
124: // <![CDATA[
125: // Function that each applet will call when loaded
126: // It will pass "its" parameter
127: // Set flags for when an applet is loaded, wait till all are loaded, and then some
128: function ggbOnInit(param) {
129: $script
130: }
131: function ggbInitAll() {
132: $calls
133: }
134: // ]]>
135: </script>
136: ENDGGBINIT
137: }
138: }
139:
140: #
141: # Each Geogebra applet is supposed to call this when parameters change
142: # Changes the hidden fields on the web page
143: #
144: sub update_script {
145: my ($id)=@_;
146: return (<<ENDUPDATESCRIPT);
147: <script type="text/javascript">
148: // <![CDATA[
149: function updatePointCoordinates_$id(coordinateName) {
150: var x = document.ggbApplet_$id.getXcoord(coordinateName);
151: var y = document.ggbApplet_$id.getYcoord(coordinateName);
152: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
153: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
154: }
155: // ]]>
156: </script>
157: ENDUPDATESCRIPT
158: }
159:
160: #
161: # Register the above update-handler for a variable
162: #
163:
164: sub update_register {
165: my ($id,$variable)=@_;
166: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
167: }
168:
169: #
170: # Set a point coordinate variable
171: #
172: sub set_point_coordinate {
173: my ($id,$variable,$x,$y,$fixed)=@_;
174: my $mult=($fixed?'a*':'');
175: # Get rid of wild exponents, make sure it's a number
176: $x=1.*$x;
177: $y=1.*$y;
178: # GeoGebra does not understand "E"
179: $x=~s/[e|E]/\*10\^/;
180: $x=~s/\+//;
181: $y=~s/[e|E]/\*10\^/;
182: $y=~s/\+//;
183: return (<<ENDSETVARIABLE);
184: document.ggbApplet_$id.evalCommand("a=1");
185: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
186: document.ggbApplet_$id.setLabelVisible("$variable",false);
187: ENDSETVARIABLE
188: }
189:
190: #
191: # Set a slope coordinate variable
192: #
193: sub set_slope_coordinate {
194: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
195: my $xvariable=$variable.'x';
196: my $yvariable=$variable.'y';
197: my $domain=$xmax-$xmin;
198: my $range=$ymax-$ymin;
199: my $xinterval=$domain/100.;
200: my $yinterval=$range/200.;
201: my $mult=($fixed?'a*':'');
202: return (<<ENDSETSVARIABLE);
203: document.ggbApplet_$id.evalCommand("a=1");
204: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
205: document.ggbApplet_$id.setVisible("$xvariable", false);
206: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
207: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
208: document.ggbApplet_$id.setVisible("$yvariable", false);
209: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
210: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
211: document.ggbApplet_$id.setLabelVisible("$variable", false);
212: ENDSETSVARIABLE
213: }
214:
215: #
216: # Input field name for a coordinate variable
217: #
218:
219: sub field_name {
220: my ($id,$variable,$name)=@_;
221: return "HWVAL_$id\_$variable\_$name";
222: }
223:
224: #
225: # Generate an input field for a coordinate variable
226: #
227:
228: sub generate_input_field {
229: my ($id,$variable,$x,$y)=@_;
230: $Apache::functionplotresponse::inputfields.=
231: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
232: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
233: }
234:
235: #
236: # Initialize a new point coordinate variable at set a listener on it
237: #
238: sub new_point_coordinate {
239: my ($id,$variable,$x,$y,$fixed)=@_;
240: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
241: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
242: }
243: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
244: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
245: }
246: &generate_input_field($id,$variable,$x,$y);
247: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
248: }
249:
250: #
251: # Initialize a new slope coordinate variable at set a listener on it
252: #
253: sub new_slope_coordinate {
254: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
255: #
256: # $variable: name of the slope point
257: # $x, $y: coordinates of the slope point
258: # $pointname: name of the associated point point
259: # $xp $yp: coordinates of the point point
260: #
261: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
262: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
263: }
264: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
265: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
266: }
267: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
268: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
269: }
270: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
271: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
272: }
273:
274: &generate_input_field($id,$variable,$x,$y);
275: my $xrel=$x-$xp;
276: my $yrel=$y-$yp;
277: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
278: }
279:
280: #
281: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
282: # It then starts the right headers
283: #
284: sub start_init_script {
285: my ($id)=@_;
286: # Add id to the list of ggbInit_$id functions that need to be called
287: push(@Apache::functionplotresponse::callscripts,$id);
288: # ... and open this function
289: return (<<ENDSTARTINIT);
290: <script type="text/javascript">
291: // <![CDATA[
292: // variable that will eventually be passed back to the server
293: var coordinateMap_$id = [];
294: // flag for not loaded yet
295: var loaded_$id=false;
296: // Init-function for applet
297: function ggbInit_$id() {
298: ENDSTARTINIT
299: }
300:
301: #
302: # This sets the axes inside ggbInit_$id
303: #
304:
305: sub axes_script {
306: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
307: return (<<ENDAXESSCRIPT);
308: // changes (xmin, xmax, ymin, ymax)
309: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
310:
311: // makes the (x,y) axis (in)visible
312: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
313: // makes the grid (in)visible
314: document.ggbApplet_$id.setGridVisible($gvisible);
315: ENDAXESSCRIPT
316: }
317:
318: sub axes_label {
319: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
320: unless ($xlabel || $ylabel) { return ''; }
321: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
322: if ($xlabel) {
323: if (($ymin<0) && ($ymax>0)) {
324: $return.=(<<ENDXAXISLABELSCRIPT);
325: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
326: document.ggbApplet_$id.setVisible("Xlabel",false);
327: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
328: ENDXAXISLABELSCRIPT
329: } else {
330: $return.=(<<ENDXOFFAXISLABEL);
331: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
332: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
333: ENDXOFFAXISLABEL
334: }
335: }
336: if ($ylabel) {
337: if (($xmin<0) && ($xmax>0)) {
338: $return.=(<<ENDYAXISLABELSCRIPT);
339: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
340: document.ggbApplet_$id.setVisible("Ylabel",false);
341: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
342: ENDYAXISLABELSCRIPT
343: } else {
344: $return.=(<<ENDYOFFAXISLABEL);
345: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
346: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
347: ENDYOFFAXISLABEL
348: }
349: }
350: return $return;
351: }
352:
353: #
354: # Subroutine to produce background and answer plots
355: #
356:
357: sub plot_script {
358: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
359: $label=~s/\W//g;
360: if (($label) && ($label!~/^[A-Za-z]/)) {
361: $label='C'.$label;
362: }
363: my $visible=0;
364: if ($label) {
365: $visible="1";
366: } else {
367: $Apache::functionplotresponse::counter++;
368: $label='C'.$Apache::functionplotresponse::counter;
369: }
370: my $rc=0;
371: my $gc=0;
372: my $bc=0;
373: if ($color) {
374: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
375: $rc=hex($rh);
376: $gc=hex($gh);
377: $bc=hex($bh);
378: }
379: if ($fixed) {
380: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
381: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
382: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
383: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
384: } else {
385: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
386: }
387: }
388:
389: #
390: # Subroutine to produce objects
391: #
392:
393: sub plotobject_script {
394: my ($id,$label,$x,$y)=@_;
395: unless ($label) {
396: $Apache::functionplotresponse::counter++;
397: $label='O'.$Apache::functionplotresponse::counter;
398: }
399: &generate_input_field($id,$label,$x,$y);
400: return "document.ggbApplet_$id.evalCommand('a=1');\n".
401: "document.ggbApplet_$id.setVisible('a', false);\n".
402: "document.ggbApplet_$id.setLabelVisible('a', false);\n".
403: "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n".
404: "document.ggbApplet_$id.setVisible('$label', true);\n".
405: "document.ggbApplet_$id.setLabelVisible('$label', true);\n";
406: }
407:
408: #
409: # Subroutine to produce vectors
410: #
411:
412: sub plotvector_script {
413: my ($id,$label,$xs,$ys,$xe,$ye,$xmin,$xmax,$fixed)=@_;
414: unless ($label) {
415: $Apache::functionplotresponse::counter++;
416: $label='V'.$Apache::functionplotresponse::counter;
417: }
418: my $startlabel=$label.'Start';
419: my $endlabel=$label.'End';
420: my $pointlabel=$label.'Point';
421: my $pointx=2.*($xmax-$xmin)+$xmax;
422: my $anglelabel=$label.'Angle';
423: return
424: &new_point_coordinate($id,$startlabel,$xs,$ys,$fixed).
425: &new_point_coordinate($id,$endlabel,$xe,$ye,$fixed).
426: (<<ENDVECTOR);
427: document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]");
428: document.ggbApplet_$id.setLabelVisible("$label",true);
429: document.ggbApplet_$id.setLineThickness("$label",8);
430: document.ggbApplet_$id.evalCommand("$pointlabel=($pointx,y($startlabel))");
431: document.ggbApplet_$id.evalCommand("$anglelabel=Angle[$pointlabel,$startlabel,$endlabel]");
432: document.ggbApplet_$id.setLabelVisible("$anglelabel",true);
433: document.ggbApplet_$id.setLabelStyle("$anglelabel",VALUE=2);
434: ENDVECTOR
435: }
436:
437: #
438: # Answer spline display
439: #
440: # points: x,y,slope_x,slope_y
441:
442: sub answer_spline_script {
443: my ($id,@points)=@_;
444: my $order=int(($#points+1)/4);
445: if ($order<2) { $order=2; }
446: if ($order>8) { $order=8; }
447: $Apache::functionplotresponse::counter++;
448: my $label='CSpline'.$Apache::functionplotresponse::counter;
449: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'[';
450: for (my $i=0;$i<=$#points;$i+=4) {
451: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),";
452: }
453: $output=~s/\,$//;
454: $output.=']");'."\n";
455: for (my $i=2; $i<2*$order; $i+=2) {
456: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n";
457: }
458: for (my $i=1; $i<2*$order; $i+=2) {
459: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n";
460: }
461:
462: return $output;
463: }
464:
465: #
466: # Subroutine that generates code for spline $label based on stored information
467: #
468:
469: sub generate_spline {
470: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
471: my $result='';
472: my $order=$Apache::functionplotresponse::splineorder{$label};
473: my $x=$Apache::functionplotresponse::splineinitx{$label};
474: my $y=$Apache::functionplotresponse::splineinity{$label};
475: my $sx=$Apache::functionplotresponse::splinescalex{$label};
476: my $sy=$Apache::functionplotresponse::splinescaley{$label};
477: my @coords=();
478: foreach my $i (1..$order) {
479: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
480: my $xp=$x;
481: $x+=$sx/(2.*($order-1));
482: push(@coords,$label.'P'.$i);
483: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
484: $x+=$sx/(2.*($order-1));
485: push(@coords,$label.'S'.$i);
486: }
487: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
488: return $result;
489: }
490:
491: #
492: # Object
493: #
494:
495: sub start_plotobject {
496: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
497: my $result='';
498: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
499: my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval);
500: my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval);
501: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
502: $label=~s/\W//gs;
503: $label=ucfirst($label);
504: unless ($label) { $label="NewObject"; }
505: if ($target eq 'web') {
506: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
507: unless (defined($x)) { $x=$xmin; }
508: unless (defined($y)) { $y=$ymin; }
509: $result.=&plotobject_script($internalid,$label,$x,$y);
510: } elsif ($target eq 'edit') {
511: $result=&Apache::edit::tag_start($target,$token,'Plot Object').
512: &Apache::edit::text_arg('Label on Plot:','label',
513: $token,'16').
514: &Apache::edit::text_arg('x:','x',
515: $token,'8').
516: &Apache::edit::text_arg('y:','y',
517: $token,'8').
518: &Apache::edit::end_row();
519: } elsif ($target eq 'modified') {
520: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
521: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','x','y');
522: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
523: }
524: return $result;
525: }
526:
527: sub end_plotobject {
528: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
529: my $result='';
530: if ($target eq 'edit') {
531: $result=&Apache::edit::end_table();
532: }
533: return $result;
534: }
535:
536: #
537: # Vector
538: #
539:
540: sub start_plotvector {
541: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
542: my $result='';
543: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
544: my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval);
545: my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval);
546: my $tipx=&Apache::lonxml::get_param('tipx',$parstack,$safeeval);
547: my $tipy=&Apache::lonxml::get_param('tipy',$parstack,$safeeval);
548:
549: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
550: $label=~s/\W//gs;
551: $label=ucfirst($label);
552: unless ($label) { $label="NewVector"; }
553: if ($target eq 'web') {
554: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
555: unless (defined($tailx)) { $tailx=$xmin; }
556: unless (defined($taily)) { $taily=$ymin; }
557: unless (defined($tipx)) { $tipx=$xmin; }
558: unless (defined($tipy)) { $tipy=$ymin; }
559: my $fixed=0;
560: if ((&Apache::response::show_answer()) || (&Apache::response::check_status()>=2)) { $fixed=1; }
561: $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy,$xmin,$xmax,$fixed);
562: } elsif ($target eq 'edit') {
563: $result=&Apache::edit::tag_start($target,$token,'Plot Vector').
564: &Apache::edit::text_arg('Label on Plot:','label',
565: $token,'16').
566: &Apache::edit::text_arg('Tail x:','tailx',
567: $token,'8').
568: &Apache::edit::text_arg('Tail y:','taily',
569: $token,'8').
570: &Apache::edit::text_arg('Tip x:','tipx',
571: $token,'8').
572: &Apache::edit::text_arg('Tip y:','tipy',
573: $token,'8').
574:
575: &Apache::edit::end_row();
576: } elsif ($target eq 'modified') {
577: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
578: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','tipx','tipy');
579: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
580: }
581: return $result;
582: }
583:
584: sub end_plotvector {
585: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
586: my $result='';
587: if ($target eq 'edit') {
588: $result=&Apache::edit::end_table();
589: }
590: return $result;
591: }
592:
593:
594:
595: #
596: # <backgroundplot function="..." fixed="yes/no" />
597: #
598: sub start_backgroundplot {
599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
600: my $result='';
601: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
602: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
603: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
604: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
605: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
606: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
607: $color=~s/[^a-fA-F0-9]//gs;
608: unless (length($color)==6) { $color=''; }
609: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
610:
611: unless ($function) { $function="0"; }
612: if ($target eq 'web') {
613: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
614: unless (defined($xinitial)) { $xinitial=$xmin; }
615: unless (defined($xfinal)) { $xfinal=$xmax; }
616: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
617: } elsif ($target eq 'edit') {
618: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
619: &Apache::edit::text_arg('Function:','function',
620: $token,'16').
621: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
622: $token,'8').
623: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
624: $token,'8').
625: &Apache::edit::text_arg('Label on Plot:','label',
626: $token,'8').
627: &Apache::edit::text_arg('Color (hex code):','color',
628: $token,'8').
629: &Apache::edit::select_arg('Fixed location:','fixed',
630: ['yes','no'],$token).
631: &Apache::edit::end_row();
632: } elsif ($target eq 'modified') {
633: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
634: $safeeval,'function','label','xinitial','xfinal','color','fixed');
635: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
636: }
637: return $result;
638: }
639:
640: sub end_backgroundplot {
641: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
642: my $result='';
643: if ($target eq 'edit') {
644: $result=&Apache::edit::end_table();
645: }
646: return $result;
647: }
648:
649: #
650: # <functionplotrule ... />
651: #
652: sub start_functionplotrule {
653: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
654: my $result='';
655: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
656: $Apache::functionplotresponse::counter++;
657: if ($label=~/\W/) {
658: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
659: }
660: $label=~s/\W//gs;
661: unless ($label) {
662: $label='R'.$Apache::functionplotresponse::counter;
663: } else {
664: $label='R'.$label;
665: }
666:
667: if ($target eq 'grade') {
668: # Simply remember - in order - for later
669: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
670: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
671: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
672: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
673: }
674: $beginninglabel=~s/\W//gs;
675: $endinglabel=~s/\W//gs;
676: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
677: $relationship=~s/\W//gs;
678: $relationship=lc($relationship);
679: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
680: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
681: $relationship='eq';
682: }
683: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
684: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
685: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
686: $derivative=0;
687: }
688: push(@Apache::functionplotresponse::functionplotrules,join(':',(
689: $label,
690: $derivative,
691: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
692: $beginninglabel,
693: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
694: $endinglabel,
695: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
696: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
697: $relationship,
698: &Apache::lonxml::get_param('value',$parstack,$safeeval),
699: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
700: )));
701: } elsif ($target eq 'edit') {
702: $result=&Apache::edit::tag_start($target,$token,'Function Plot Graph Rule').
703: &Apache::edit::text_arg('Index/Name:','index',
704: $token,'10').' '.
705: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
706: [['0','Function itself'],
707: ['1','First derivative'],
708: ['2','Second derivative'],
709: ['-1','Integral']],$token).'<br />'.
710: &Apache::edit::text_arg('Initial x-value:','xinitial',
711: $token,'8').
712: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
713: [['start','Start of Plot'],
714: ['end','End of Plot']],$token,'8').'<br />'.
715:
716: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
717: $token,'8').
718: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
719: [['end','End of Plot']],$token,'8').'<br />'.
720: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
721: $token,'8').
722: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
723: $token,'8').'<br />'.
724: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
725: [['eq','equal'],
726: ['ne','not equal'],
727: ['ge','greater than or equal'],
728: ['gt','greater than'],
729: ['lt','less than'],
730: ['le','less than or equal']],$token).
731: $result.= &Apache::edit::select_or_text_arg('Value:','value',
732: [['undef','not defined']],$token,'30').
733: &Apache::edit::text_arg('Percent error:','percenterror',
734: $token,'8').
735: &Apache::edit::end_row();
736: } elsif ($target eq 'modified') {
737: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
738: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
739: }
740: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
741: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
742: }
743: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
744: $safeeval,'index','derivativeorder',
745: 'xinitial','xinitiallabel','xfinal','xfinallabel',
746: 'minimumlength','maximumlength',
747: 'relationship','value','percenterror');
748: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
749: }
750: return $result;
751: }
752:
753: sub end_functionplotrule {
754: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
755: my $result='';
756: if ($target eq 'edit') {
757: $result=&Apache::edit::end_table();
758: }
759: return $result;
760: }
761:
762:
763: #
764: # <functionplotvectorrule ... />
765: #
766: sub start_functionplotvectorrule {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
768: my $result='';
769: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
770: $Apache::functionplotresponse::counter++;
771: if ($label=~/\W/) {
772: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
773: }
774: $label=~s/\W//gs;
775: unless ($label) {
776: $label='R'.$Apache::functionplotresponse::counter;
777: } else {
778: $label='R'.$label;
779: }
780:
781: if ($target eq 'grade') {
782: # Simply remember - in order - for later
783:
784: my $id=$Apache::inputtags::response[-1];
785: my $partid=$Apache::inputtags::part;
786: my $internalid = $partid.'_'.$id;
787:
788: my $vector=&Apache::lonxml::get_param('vector',$parstack,$safeeval);
789: $vector=~s/\W//gs;
790: $vector=ucfirst($vector);
791:
792: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
793: $label,
794: 'vector',
795: $internalid,
796: $vector,
797: &Apache::lonxml::get_param('attachpoint',$parstack,$safeeval),
798: &Apache::lonxml::get_param('notattachpoint',$parstack,$safeeval),
799: &Apache::lonxml::get_param('tailpoint',$parstack,$safeeval),
800: &Apache::lonxml::get_param('tippoint',$parstack,$safeeval),
801: &Apache::lonxml::get_param('nottailpoint',$parstack,$safeeval),
802: &Apache::lonxml::get_param('nottippoint',$parstack,$safeeval),
803: &Apache::lonxml::get_param('length',$parstack,$safeeval),
804: &Apache::lonxml::get_param('angle',$parstack,$safeeval),
805: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval),
806: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval),
807: )));
808: } elsif ($target eq 'edit') {
809: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Rule').
810: &Apache::edit::text_arg('Index/Name:','index',
811: $token,'10').' '.
812: &Apache::edit::text_arg('Vector:','vector',
813: $token,'16').'<br />'.
814: &Apache::edit::text_arg('Attached to object:','attachpoint',
815: $token,'16').
816: &Apache::edit::text_arg('Not attached to object:','notattachpoint',
817: $token,'16').'<br />'.
818: &Apache::edit::text_arg('Tail attached to object:','tailpoint',
819: $token,'16').
820: &Apache::edit::text_arg('Tip attached to object:','tippoint',
821: $token,'16').
822: &Apache::edit::text_arg('Tail not attached to object:','nottailpoint',
823: $token,'16').
824: &Apache::edit::text_arg('Tip not attached to object:','nottippoint',
825: $token,'16').'<br />'.
826: &Apache::edit::text_arg('Length:','length',
827: $token,'30').
828: &Apache::edit::text_arg('Absolute error length:','lengtherror',
829: $token,'8').'<br />'.
830: &Apache::edit::text_arg('Angle:','angle',
831: $token,'30').
832: &Apache::edit::text_arg('Absolute error angle:','angleerror',
833: $token,'8').
834: &Apache::edit::end_row();
835: } elsif ($target eq 'modified') {
836: $env{'form.'.&Apache::edit::html_element_name('vector')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('vector')});
837: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
838: $safeeval,'index','vector','attachpoint','notattachpoint',
839: 'tailpoint','tippoint','nottailpoint','nottipoint',
840: 'length','angle',
841: 'lengtherror','angleerror');
842: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
843: }
844: return $result;
845: }
846:
847: sub end_functionplotvectorrule {
848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
849: my $result='';
850: if ($target eq 'edit') {
851: $result=&Apache::edit::end_table();
852: }
853: return $result;
854: }
855:
856: #
857: # <functionplotvectorsumrule ... />
858: #
859: sub start_functionplotvectorsumrule {
860: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
861: my $result='';
862: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
863: $Apache::functionplotresponse::counter++;
864: if ($label=~/\W/) {
865: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
866: }
867: $label=~s/\W//gs;
868: unless ($label) {
869: $label='R'.$Apache::functionplotresponse::counter;
870: } else {
871: $label='R'.$label;
872: }
873: if ($target eq 'grade') {
874: # Simply remember - in order - for later
875: my $id=$Apache::inputtags::response[-1];
876: my $partid=$Apache::inputtags::part;
877: my $internalid = $partid.'_'.$id;
878: my $vectors=&Apache::lonxml::get_param('vectors',$parstack,$safeeval);
879: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
880: $label,
881: 'sum',
882: $internalid,
883: $vectors,
884: &Apache::lonxml::get_param('length',$parstack,$safeeval),
885: &Apache::lonxml::get_param('angle',$parstack,$safeeval),
886: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval),
887: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval),
888: )));
889: } elsif ($target eq 'edit') {
890: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Sum Rule').
891: &Apache::edit::text_arg('Index/Name:','index',
892: $token,'10').' '.
893: &Apache::edit::text_arg('Comma-separated list of vectors:','vectors',
894: $token,'30').'<br />'.
895: &Apache::edit::text_arg('Sum vector length:','length',
896: $token,'30').
897: &Apache::edit::text_arg('Absolute error length:','lengtherror',
898: $token,'8').'<br />'.
899: &Apache::edit::text_arg('Sum vector angle:','angle',
900: $token,'30').
901: &Apache::edit::text_arg('Absolute error angle:','angleerror',
902: $token,'8').
903: &Apache::edit::end_row();
904: } elsif ($target eq 'modified') {
905: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
906: $safeeval,'index','vectors',
907: 'length','angle',
908: 'lengtherror','angleerror');
909: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
910: }
911: return $result;
912: }
913:
914: sub end_functionplotvectorsumrule {
915: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
916: my $result='';
917: if ($target eq 'edit') {
918: $result=&Apache::edit::end_table();
919: }
920: return $result;
921: }
922:
923: #
924: # <functionplotcustom ... />
925: #
926: sub start_functionplotcustomrule {
927: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
928: my $result='';
929: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
930: $Apache::functionplotresponse::counter++;
931: if ($label=~/\W/) {
932: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
933: }
934: $label=~s/\W//gs;
935: unless ($label) {
936: $label='R'.$Apache::functionplotresponse::counter;
937: } else {
938: $label='R'.$label;
939: }
940: &Apache::lonxml::register('Apache::response',('answer'));
941: if ($target eq 'edit') {
942: $result=&Apache::edit::tag_start($target,$token,'Function Plot Custom Rule').
943: &Apache::edit::text_arg('Index/Name:','index',$token,'10').
944: &Apache::edit::end_row();
945: } elsif ($target eq 'modified') {
946: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'index');
947: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
948: }
949: return $result;
950: }
951:
952: sub end_functionplotcustomrule {
953: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
954: my $result='';
955: if ($target eq 'edit') {
956: $result=&Apache::edit::end_table();
957: } elsif ($target eq 'grade') {
958: # Simply remember - in order - for later
959: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
960: $Apache::functionplotresponse::counter++;
961: if ($label=~/\W/) {
962: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
963: }
964: $label=~s/\W//gs;
965: unless ($label) {
966: $label='R'.$Apache::functionplotresponse::counter;
967: } else {
968: $label='R'.$label;
969: }
970: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
971: $label,
972: 'custom',
973: &escape($Apache::response::custom_answer[-1])
974: )));
975: }
976: &Apache::lonxml::deregister('Apache::response',('answer'));
977: return $result;
978: }
979:
980:
981:
982: #
983: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
984: #
985: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
986: #
987: sub start_spline {
988: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
989: my $result='';
990: if ($target eq 'web') {
991: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
992: $Apache::functionplotresponse::counter++;
993: if ($label=~/\W/) {
994: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
995: }
996: $label=~s/\W//gs;
997: unless ($label) {
998: $label='S'.$Apache::functionplotresponse::counter;
999: } else {
1000: $label='S'.$label;
1001: }
1002: if ($Apache::functionplotresponse::splineorder{$label}) {
1003: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1004: }
1005:
1006: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
1007: if ($order<2) { $order=2; }
1008: if ($order>8) { $order=8; }
1009: $Apache::functionplotresponse::splineorder{$label}=$order;
1010:
1011: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
1012: unless ($x) { $x=0; }
1013: $Apache::functionplotresponse::splineinitx{$label}=$x;
1014:
1015: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
1016: unless ($y) { $y=0; }
1017: $Apache::functionplotresponse::splineinity{$label}=$y;
1018:
1019: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
1020: unless ($sx) { $sx=$order; }
1021: $Apache::functionplotresponse::splinescalex{$label}=$sx;
1022:
1023: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
1024: unless ($sy) { $sy=2; }
1025: $Apache::functionplotresponse::splinescaley{$label}=$sy;
1026: } elsif ($target eq 'edit') {
1027: $result=&Apache::edit::tag_start($target,$token,'Spline').
1028: &Apache::edit::text_arg('Index:','index',
1029: $token,'4').' '.
1030: &Apache::edit::select_arg('Order:','order',
1031: ['2','3','4','5','6','7','8'],$token).' '.
1032: &Apache::edit::text_arg('Initial x-value:','initx',
1033: $token,'4').' '.
1034: &Apache::edit::text_arg('Initial y-value:','inity',
1035: $token,'4').' '.
1036: &Apache::edit::text_arg('Scale x:','scalex',
1037: $token,'4').' '.
1038: &Apache::edit::text_arg('Scale y:','scaley',
1039: $token,'4').
1040: &Apache::edit::end_row();
1041: } elsif ($target eq 'modified') {
1042: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1043: $safeeval,'index','order','initx','inity',
1044: 'scalex','scaley');
1045: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1046: }
1047: return $result;
1048: }
1049:
1050: sub end_spline {
1051: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1052: my $result='';
1053: if ($target eq 'edit') {
1054: $result=&Apache::edit::end_table();
1055: }
1056: return $result;
1057: }
1058:
1059: sub end_init_script {
1060: return (<<ENDENDINIT);
1061: }
1062: // ]]>
1063: </script>
1064: ENDENDINIT
1065: }
1066:
1067: #
1068: # Storing and restoring spline coordinates from part answers
1069: #
1070: sub decode_previous_answer {
1071: my ($answer)=@_;
1072: foreach my $coordinate (split(/\,/,$answer)) {
1073: my ($key,$value)=split(/\=/,$coordinate);
1074: $Apache::functionplotresponse::previous{$key}=$value;
1075: }
1076: }
1077:
1078: sub get_answer_from_form_fields {
1079: my ($id)=@_;
1080: my $answer='';
1081: my %coords=();
1082: foreach my $field (keys(%env)) {
1083: if ($field=~/^form\.HWVAL\_$id/) {
1084: $field=~/^form\.(.*)$/;
1085: $coords{$1}=$env{$field};
1086: }
1087: }
1088: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
1089: return ($answer,%coords);
1090: }
1091:
1092: #
1093: # The following functions calculate the cubic-hermite splines server-side
1094: #
1095:
1096: sub cubic_hermite {
1097: my ($t,$p1,$s1,$p2,$s2)=@_;
1098: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
1099: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1100: }
1101:
1102: #
1103: # d/dt(...)
1104: #
1105:
1106: sub ddt_cubic_hermite {
1107: my ($t,$p1,$s1,$p2,$s2)=@_;
1108: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
1109: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1110: }
1111:
1112: #
1113: # d^2/dt^2(...)
1114: #
1115:
1116: sub d2dt2_cubic_hermite {
1117: my ($t,$p1,$s1,$p2,$s2)=@_;
1118: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
1119: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1120: }
1121:
1122: #
1123: # Array index calculation
1124: #
1125: sub array_index {
1126: my ($xmin,$xmax,$x)=@_;
1127: if ($x ne '') {
1128: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
1129: } else {
1130: return undef;
1131: }
1132: }
1133:
1134: #
1135: # Populate the arrays
1136: #
1137:
1138: sub populate_arrays {
1139: my ($id,$xmin,$xmax,$ymin,$ymax)=@_;
1140: for (my $i=0; $i<=400; $i++) {
1141: $Apache::functionplotresponse::actualxval[$i]=undef;
1142: $Apache::functionplotresponse::func[$i]=undef;
1143: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1144: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1145: }
1146: unless ($xmax>$xmin) { return 'no_func'; }
1147: # Run over all splines in response
1148: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1149: my $xiold=-1;
1150: # Run over all points in spline
1151: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1152: my $ni=$i+1;
1153: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
1154: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
1155: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
1156: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
1157: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
1158: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
1159: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
1160: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
1161: # Run in small steps over spline parameter
1162: for (my $t=0; $t<=1; $t+=0.0001) {
1163: my $xreal=&cubic_hermite($t,@xparms);
1164: my $xi=&array_index($xmin,$xmax,$xreal);
1165: if ($xi<$xiold) { return 'no_func'; }
1166: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1167: $xiold=$xi;
1168: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1169: # Function value
1170: my $funcval=&cubic_hermite($t,@yparms);
1171:
1172: # Do we already have a value for this point, and is it different from the new one?
1173: if ((defined($Apache::functionplotresponse::func[$xi])) &&
1174: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) {
1175: return 'no_func';
1176: }
1177: # Okay, remember the new point
1178: $Apache::functionplotresponse::func[$xi]=$funcval;
1179:
1180: if (defined($funcval)) {
1181: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
1182: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
1183: }
1184: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
1185: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
1186: }
1187: }
1188: # Chain rule
1189: # dy/dx=dy/dt/(dx/dt)
1190: my $dxdt=&ddt_cubic_hermite($t,@xparms);
1191: if ($dxdt) {
1192: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1193: # Second derivative
1194: $Apache::functionplotresponse::d2funcdx2[$xi]=
1195: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
1196: ($dxdt*$dxdt*$dxdt);
1197: }
1198: }
1199: }
1200: }
1201: }
1202: }
1203:
1204: #
1205: # Implementation of <functionplotresponse>
1206: #
1207:
1208: sub start_functionplotresponse {
1209: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1210: my $result='';
1211: # To remember the splines - somehow, they need to come last
1212: undef %Apache::functionplotresponse::splineorder;
1213: undef %Apache::functionplotresponse::splineinitx;
1214: undef %Apache::functionplotresponse::splineinity;
1215: undef %Apache::functionplotresponse::splinescalex;
1216: undef %Apache::functionplotresponse::splinescaley;
1217: # Remember input fields, etc
1218: undef %Apache::functionplotresponse::previous;
1219: $Apache::functionplotresponse::inputfields='';
1220: $Apache::functionplotresponse::counter=0;
1221: # Remember rules
1222: undef @Apache::functionplotresponse::functionplotrules;
1223: undef @Apache::functionplotresponse::functionplotvectorrules;
1224: # Remember failed rules
1225: if ($target eq 'grade') {
1226: undef @Apache::functionplotresponse::failedrules;
1227: }
1228: # Delete previous awards
1229: undef $Apache::functionplotresponse::awarddetail;
1230: # Part and ID
1231: my $partid=$Apache::inputtags::part;
1232: my $id=&Apache::response::start_response($parstack,$safeeval);
1233: # Internal ID to mark the applet and its coordinates
1234: my $internalid = $partid.'_'.$id;
1235: # Previous answer
1236: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
1237:
1238: # Parameters of <functionplotresponse>
1239: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1240: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1241: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1242: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1243: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
1244: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1245: if ($target eq 'edit') {
1246: $result.=&Apache::edit::start_table($token)
1247: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
1248: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1249: .&Apache::edit::deletelist($target,$token).' '
1250: .&Apache::edit::insertlist($target,$token).' '
1251: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1252: .'</span></td>'
1253: ."<td> "
1254: .&Apache::edit::end_row()
1255: .&Apache::edit::start_spanning_row()
1256: ."\n";
1257: $result.=&Apache::edit::text_arg('Width (pixels):','width',
1258: $token,'6').' '.
1259: &Apache::edit::text_arg('Height (pixels):','height',
1260: $token,'6').'<br />'.
1261: &Apache::edit::text_arg('Label x-axis:','xlabel',
1262: $token,'6').' '.
1263: &Apache::edit::text_arg('Minimum x-value:','xmin',
1264: $token,'4').' '.
1265: &Apache::edit::text_arg('Maximum x-value:','xmax',
1266: $token,'4').' '.
1267: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1268: ['yes','no'],$token).'<br />'.
1269: &Apache::edit::text_arg('Label y-axis:','ylabel',
1270: $token,'6').' '.
1271: &Apache::edit::text_arg('Minimum y-value:','ymin',
1272: $token,'4').' '.
1273: &Apache::edit::text_arg('Maximum y-value:','ymax',
1274: $token,'4').' '.
1275: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1276: ['yes','no'],$token).'<br />'.
1277: &Apache::edit::select_arg('Grid visible:','gridvisible',
1278: ['yes','no'],$token).'<br />'.
1279: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1280: 'answerdisplay',$token,'50').
1281: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1282: } elsif ($target eq 'modified') {
1283: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1284: $safeeval,'width','height','xlabel','xmin','xmax','ylabel','ymin','ymax',
1285: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1286: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1287:
1288: } elsif ($target eq 'meta') {
1289: $result=&Apache::response::meta_package_write('functionplotresponse');
1290: } elsif (($target eq 'answer') &&
1291: ($env{'form.answer_output_mode'} ne 'tex') &&
1292: ($Apache::lonhomework::viewgrades == 'F')) {
1293: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
1294: $uname =~s/\W//g;
1295: $udom =~s/\W//g;
1296: my $function_name =
1297: join('_','LONCAPA_scriptvars',$uname,$udom,
1298: $env{'form.counter'},$Apache::lonxml::curdepth);
1299: &Apache::lonxml::add_script_result(
1300: &Apache::loncommon::modal_adhoc_window($function_name,700,500,
1301: '<pre>'.$Apache::functionplotresponse::ruleslog.'</pre>',
1302: &mt('Rules Log'))."<br />");
1303: }
1304: return $result;
1305: }
1306:
1307: sub compare_rel {
1308: my ($relationship,$value,$realval,$tol)=@_;
1309: # is the real value undefined?
1310: unless (defined($realval)) {
1311: # the real value is not defined
1312: if ($relationship eq 'eq') {
1313: if ($value eq 'undef') {
1314: return 1;
1315: } else {
1316: return 0;
1317: }
1318: } elsif ($relationship eq 'ne') {
1319: if ($value eq 'undef') {
1320: return 0;
1321: } else {
1322: return 1;
1323: }
1324: } else {
1325: return 0;
1326: }
1327: }
1328:
1329: # is the expected value undefined?
1330: if ($value eq 'undef') {
1331: # but by now we know that the real value is defined
1332: return 0;
1333: }
1334:
1335: # both are defined.
1336: if ($relationship eq 'gt') {
1337: return ($realval>$value);
1338: } elsif ($relationship eq 'ge') {
1339: return ($realval>$value-$tol);
1340: } elsif ($relationship eq 'lt') {
1341: return ($realval<$value);
1342: } elsif ($relationship eq 'le') {
1343: return ($realval<$value+$tol);
1344: } elsif ($relationship eq 'ne') {
1345: return (abs($value-$realval)>$tol);
1346: } else {
1347: return (abs($value-$realval)<$tol);
1348: }
1349: return 0;
1350: }
1351:
1352: sub addlog {
1353: my ($text)=@_;
1354: $text=~s/\'/\\\'/g;
1355: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
1356: }
1357:
1358: sub actualval {
1359: my ($i,$xmin,$xmax)=@_;
1360: return $xmin+$i/400.*($xmax-$xmin);
1361: }
1362:
1363: sub fpr_val {
1364: my ($arg)=@_;
1365: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg},
1366: $Apache::functionplotresponse::fpr_xmin,
1367: $Apache::functionplotresponse::fpr_xmax);
1368: }
1369:
1370: sub fpr_f {
1371: my ($arg)=@_;
1372: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin,
1373: $Apache::functionplotresponse::fpr_xmax,
1374: $arg)];
1375: }
1376:
1377: sub fpr_dfdx {
1378: my ($arg)=@_;
1379: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin,
1380: $Apache::functionplotresponse::fpr_xmax,
1381: $arg)];
1382: }
1383:
1384: sub fpr_d2fdx2 {
1385: my ($arg)=@_;
1386: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin,
1387: $Apache::functionplotresponse::fpr_xmax,
1388: $arg)];
1389: }
1390:
1391: sub fpr_vectorcoords {
1392: my ($arg)=@_;
1393: $arg=~s/\W//gs;
1394: $arg=ucfirst($arg);
1395: my $id=$Apache::inputtags::response[-1];
1396: my $partid=$Apache::inputtags::part;
1397: my $internalid = $partid.'_'.$id;
1398: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_x'},
1399: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_x'},
1400: $env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_y'},
1401: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_y'});
1402: }
1403:
1404: sub fpr_objectcoords {
1405: my ($arg)=@_;
1406: $arg=~s/\W//gs;
1407: $arg=ucfirst($arg);
1408: my $id=$Apache::inputtags::response[-1];
1409: my $partid=$Apache::inputtags::part;
1410: my $internalid = $partid.'_'.$id;
1411: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'_x'},
1412: $env{'form.HWVAL_'.$internalid.'_'.$arg.'_y'});
1413: }
1414:
1415: sub fpr_vectorlength {
1416: my ($arg)=@_;
1417: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg);
1418: return sqrt(($xe-$xs)*($xe-$xs)+($ye-$ys)*($ye-$ys));
1419: }
1420:
1421: sub fpr_vectorangle {
1422: my ($arg)=@_;
1423: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg);
1424: my $angle=57.2957795*atan2(($ye-$ys),($xe-$xs));
1425: if ($angle<0) { $angle=360+$angle; }
1426: return $angle;
1427: }
1428:
1429: sub vectorcoords {
1430: my ($id,$label)=@_;
1431: return ($env{'form.HWVAL_'.$id.'_'.$label.'Start_x'},
1432: $env{'form.HWVAL_'.$id.'_'.$label.'End_x'},
1433: $env{'form.HWVAL_'.$id.'_'.$label.'Start_y'},
1434: $env{'form.HWVAL_'.$id.'_'.$label.'End_y'});
1435: }
1436:
1437: sub objectcoords {
1438: my ($id,$label)=@_;
1439: return ($env{'form.HWVAL_'.$id.'_'.$label.'_x'},
1440: $env{'form.HWVAL_'.$id.'_'.$label.'_y'});
1441: }
1442:
1443: sub attached {
1444: my ($id,$vector,$objects,$xmin,$xmax,$ymin,$ymax)=@_;
1445: my ($xs,$xe,$ys,$ye)=&vectorcoords($id,$vector);
1446: my $tolx=($xmax-$xmin)/100.;
1447: my $toly=($ymax-$ymin)/100.;
1448: my $tail=0;
1449: my $tip=0;
1450: foreach my $obj (split(/\s*\,\s*/,$objects)) {
1451: $obj=~s/\W//g;
1452: unless ($obj) { next; }
1453: $obj=ucfirst($obj);
1454: my ($xo,$yo)=&objectcoords($id,$obj);
1455: &addlog("Proximity $vector ($xs,$ys)-($xe,$ye) to $obj ($xo,$yo)");
1456: if ((abs($xs-$xo)<$tolx) && (abs($ys-$yo)<$toly)) {
1457: $tail=1;
1458: &addlog("Attached tail: $obj");
1459: }
1460: if ((abs($xe-$xo)<$tolx) && (abs($ye-$yo)<$toly)) {
1461: $tip=1;
1462: &addlog("Attached tip: $obj");
1463: }
1464: }
1465: &addlog("Result tail:$tail tip:$tip");
1466: return($tail,$tip);
1467: }
1468:
1469:
1470: sub vectorangle {
1471: my ($x,$y)=@_;
1472: my $angle=57.2957795*atan2($y,$x);
1473: if ($angle<0) { $angle=360+$angle; }
1474: return $angle;
1475: }
1476:
1477: sub vectorlength {
1478: my ($x,$y)=@_;
1479: return sqrt($x*$x+$y*$y);
1480: }
1481:
1482: sub relvector {
1483: my ($xs,$xe,$ys,$ye)=@_;
1484: return ($xe-$xs,$ye-$ys);
1485: }
1486:
1487: sub plotvectorlength {
1488: return &vectorlength(&relvector(&vectorcoords(@_)));
1489: }
1490:
1491: sub plotvectorangle {
1492: return &vectorangle(&relvector(&vectorcoords(@_)));
1493: }
1494:
1495:
1496: #
1497: # Evaluate a functionplotvectorrule
1498: #
1499:
1500: sub functionplotvectorrulecheck {
1501: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1502: &addlog("=================");
1503: my ($label,$type)=split(/\:/,$rule);
1504: if ($type eq 'vector') {
1505: return &vectorcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
1506: } elsif ($type eq 'sum') {
1507: return &sumcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
1508: } elsif ($type eq 'custom') {
1509: return &customcheck($rule,$safeeval);
1510: }
1511: }
1512:
1513: sub vectorcheck {
1514: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1515: my ($label,$type,$id,$vector,
1516: $attachpoint,$notattachpoint,
1517: $tailpoint,$tippoint,$nottailpoint,$nottippoint,
1518: $length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule);
1519: &addlog("Vector Rule $label for vector ".$vector);
1520: if ($length ne '') {
1521: &addlog("Checking for length $length with error $lengtherror");
1522: $length=&Apache::run::run($length,$safeeval);
1523: &addlog("Length evaluated to $length");
1524: my $thislength=&plotvectorlength($id,$vector);
1525: &addlog("Found length $thislength");
1526: if (abs($thislength-$length)>$lengtherror) {
1527: &setfailed($label);
1528: return 0;
1529: }
1530: }
1531: if ($angle ne '') {
1532: &addlog("Checking for angle $angle with error $angleerror");
1533: $angle=&Apache::run::run($angle,$safeeval);
1534: &addlog("Angle evaluated to $angle");
1535: my $thisangle=&plotvectorangle($id,$vector);
1536: &addlog("Found angle $thisangle");
1537: my $anglediff=abs($thisangle-$angle);
1538: &addlog("Angle difference: $anglediff");
1539: if ($anglediff>360.-$anglediff) {
1540: $anglediff=360.-$anglediff;
1541: }
1542: &addlog("Smallest angle difference: $anglediff");
1543: if ($anglediff>$angleerror) {
1544: &setfailed($label);
1545: return 0;
1546: }
1547: }
1548: if ($attachpoint ne '') {
1549: &addlog("Checking attached: ".$attachpoint);
1550: my ($tail,$tip)=&attached($id,$vector,$attachpoint,$xmin,$xmax,$ymin,$ymax);
1551: unless ($tail || $tip) {
1552: &setfailed($label);
1553: return 0;
1554: }
1555: }
1556: if ($notattachpoint ne '') {
1557: &addlog("Checking not attached: ".$notattachpoint);
1558: my ($tail,$tip)=&attached($id,$vector,$notattachpoint,$xmin,$xmax,$ymin,$ymax);
1559: if ($tail || $tip) {
1560: &setfailed($label);
1561: return 0;
1562: }
1563: }
1564: if ($tailpoint ne '') {
1565: &addlog("Checking tail: ".$tailpoint);
1566: my ($tail,$tip)=&attached($id,$vector,$tailpoint,$xmin,$xmax,$ymin,$ymax);
1567: unless ($tail) {
1568: &setfailed($label);
1569: return 0;
1570: }
1571: }
1572: if ($nottailpoint ne '') {
1573: &addlog("Checking not tail: ".$nottailpoint);
1574: my ($tail,$tip)=&attached($id,$vector,$nottailpoint,$xmin,$xmax,$ymin,$ymax);
1575: if ($tail) {
1576: &setfailed($label);
1577: return 0;
1578: }
1579: }
1580: if ($tippoint ne '') {
1581: &addlog("Checking tip: ".$tippoint);
1582: my ($tail,$tip)=&attached($id,$vector,$tippoint,$xmin,$xmax,$ymin,$ymax);
1583: unless ($tip) {
1584: &setfailed($label);
1585: return 0;
1586: }
1587: }
1588: if ($nottippoint ne '') {
1589: &addlog("Checking not tip: ".$nottippoint);
1590: my ($tail,$tip)=&attached($id,$vector,$nottippoint,$xmin,$xmax,$ymin,$ymax);
1591: if ($tip) {
1592: &setfailed($label);
1593: return 0;
1594: }
1595: }
1596:
1597: &addlog("Rule $label passed.");
1598: return 1;
1599: }
1600:
1601: sub sumcheck {
1602: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1603: my ($label,$type,$id,$vectors,$length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule);
1604: &addlog("Vector Sum Rule $label for vectors ".$vectors);
1605: my $sumx=0;
1606: my $sumy=0;
1607: foreach my $sv (split(/\s*\,\s*/,$vectors)) {
1608: my ($rx,$ry)=&relvector(&vectorcoords($id,$sv));
1609: $sumx+=$rx;
1610: $sumy+=$ry;
1611: }
1612: &addlog("Sum vector ($sumx,$sumy)");
1613: if ($length ne '') {
1614: &addlog("Checking length $length with error $lengtherror");
1615: $length=&Apache::run::run($length,$safeeval);
1616: &addlog("Evaluated to $length");
1617: my $thislength=&vectorlength($sumx,$sumy);
1618: &addlog("Actual length $thislength");
1619: if (abs($length-$thislength)>$lengtherror) {
1620: &setfailed($label);
1621: return 0;
1622: }
1623: }
1624: if ($angle ne '') {
1625: &addlog("Checking angle $angle with error $angleerror");
1626: $angle=&Apache::run::run($angle,$safeeval);
1627: &addlog("Evaluated to $angle");
1628: my $thisangle=&vectorangle($sumx,$sumy);
1629: &addlog("Actual angle $thisangle");
1630: my $anglediff=abs($thisangle-$angle);
1631: &addlog("Angle difference: $anglediff");
1632: if ($anglediff>360.-$anglediff) {
1633: $anglediff=360.-$anglediff;
1634: }
1635: &addlog("Smallest angle difference: $anglediff");
1636: if ($anglediff>$angleerror) {
1637: &setfailed($label);
1638: return 0;
1639: }
1640: }
1641: &addlog("Rule $label passed.");
1642: return 1;
1643: }
1644:
1645: sub customcheck {
1646: my ($rule,$safeeval)=@_;
1647: my ($label,$type,$prg)=split(/\:/,$rule);
1648: &addlog("Custom Rule ".$label);
1649: my $result=&Apache::run::run(&unescape($prg),$safeeval);
1650: &addlog("Algorithm returned $result");
1651: unless ($result) {
1652: &setfailed($label);
1653: return 0;
1654: }
1655: &addlog("Rule $label passed.");
1656: return 1;
1657: }
1658:
1659: #
1660: # Evaluate a functionplotrule
1661: #
1662:
1663: sub functionplotrulecheck {
1664: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1665:
1666: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1667: =split(/\:/,$rule);
1668: $percent=($percent>0?$percent:5);
1669: &addlog("=================");
1670: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1671: #
1672: # Evaluate the value
1673: #
1674: if (($value=~/\D/) && ($value ne 'undef')) {
1675: $Apache::functionplotresponse::fpr_xmin=$xmin;
1676: $Apache::functionplotresponse::fpr_xmax=$xmax;
1677: $value=&Apache::run::run($value,$safeeval);
1678: &addlog("Value evaluated to $value");
1679: }
1680:
1681: #
1682: # Minimum and maximum lengths of the interval
1683: #
1684: if ((defined($minimumlength)) || (defined($maximumlength))) {
1685: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
1686: }
1687: my $li=0;
1688: my $lh=400;
1689:
1690: # Special case: the upper boundary was not defined
1691: # and needs to be set to the value where
1692: # the condition is not true anymore => set flag
1693:
1694: my $findupper=0;
1695: if (($xfinal eq '')
1696: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
1697: && ($xfinallabel)) {
1698: $findupper=1;
1699: }
1700:
1701: # if a hard value is set for the boundaries, it overrides the label
1702: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
1703: $li=&array_index($xmin,$xmax,$xinitial);
1704: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
1705: }
1706: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
1707: $lh=&array_index($xmin,$xmax,$xfinal);
1708: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1709: }
1710: # if the label is defined, use it
1711: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1712: &addlog("Using lower label $xinitiallabel");
1713: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1714: } else {
1715: $li=&array_index($xmin,$xmax,$xinitial);
1716: }
1717: unless ($findupper) {
1718: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1719: &addlog("Using upper label $xfinallabel");
1720: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1721: } else {
1722: $lh=&array_index($xmin,$xmax,$xfinal);
1723: }
1724: }
1725: # Basic sanity checks
1726: if ($li<0) { $li=0; }
1727: if ($lh>400) { $lh=400; }
1728: if (($li>$lh) || (!defined($lh))) {
1729: $lh=$li;
1730: }
1731:
1732: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1733: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1734: if ($findupper) {
1735: &addlog("Looking for label $xfinallabel");
1736: }
1737: my $tol=$percent*($ymax-$ymin)/100;
1738: if ($xmax>$xmin) {
1739: if ($derivative==2) {
1740: $tol=4.*$tol/($xmax-$xmin);
1741: } elsif ($derivative==1) {
1742: $tol=2.*$tol/($xmax-$xmin);
1743: } elsif ($derivative==-1) {
1744: $tol=$tol*($xmax-$xmin)/2.;
1745: }
1746: }
1747: my $integral=0;
1748: my $binwidth=($xmax-$xmin)/400.;
1749: if (($derivative<0) && (!$findupper)) {
1750: # definite integral, calculate over whole length
1751: &addlog("Calculating definite integral");
1752: for (my $i=$li; $i<=$lh; $i++) {
1753: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1754: }
1755: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1756: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1757: &addlog("Rule $label failed.");
1758: &setfailed($label);
1759: return 0;
1760: }
1761: } else {
1762: for (my $i=$li; $i<=$lh; $i++) {
1763: my $val;
1764: if ($derivative==2) {
1765: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1766: } elsif ($derivative==1) {
1767: $val=$Apache::functionplotresponse::dfuncdx[$i];
1768: } elsif ($derivative==-1) {
1769: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1770: $val=$integral;
1771: } else {
1772: $val=$Apache::functionplotresponse::func[$i];
1773: }
1774: unless (&compare_rel($relationship,$value,$val,$tol)) {
1775: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1776: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1777: if (($findupper) && ($i>$li)) {
1778: # Check lengths
1779: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1780: # Successfully found a new label, set it
1781: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1782: &addlog("Rule $label passed, setting label $xfinallabel");
1783: return 1;
1784: } else {
1785: &addlog("Rule $label failed.");
1786: &setfailed($label);
1787: return 0;
1788: }
1789: }
1790: }
1791: }
1792: # Corner case where this makes sense: using start or stop as defined labels
1793: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1794: &addlog("Rule $label passed.");
1795: return 1;
1796: }
1797:
1798: #
1799: # check for minimum and maximum lengths
1800: #
1801:
1802: sub checklength {
1803: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1804: unless (($minimumlength) || ($maximumlength)) { return 1; }
1805: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1806: if ($minimumlength) {
1807: if ($length<$minimumlength) {
1808: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1809: &setfailed($label);
1810: return 0;
1811: }
1812: }
1813: if ($maximumlength) {
1814: if ($length>$maximumlength) {
1815: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1816: &setfailed($label);
1817: return 0;
1818: }
1819: }
1820: return 1;
1821: }
1822:
1823: sub setfailed {
1824: my ($hintlabel)=@_;
1825: $hintlabel=~s/^R//;
1826: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1827: &addlog("Set hint condition $hintlabel");
1828: }
1829:
1830: sub start_functionplotruleset {
1831: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1832: if ($target eq 'edit') {
1833: return &Apache::edit::start_table($token).
1834: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1835: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1836: .&Apache::edit::deletelist($target,$token).' '.
1837: &Apache::edit::insertlist($target,$token).' '
1838: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1839: .'</span></td>'
1840: ."<td> "
1841: .&Apache::edit::end_row()
1842: .&Apache::edit::start_spanning_row()
1843: ."\n";
1844: }
1845: }
1846:
1847: sub end_functionplotruleset {
1848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1849: my $id=$Apache::inputtags::response[-1];
1850: my $partid=$Apache::inputtags::part;
1851: my $internalid = $partid.'_'.$id;
1852:
1853: if ($target eq 'edit' ) {
1854: return &Apache::edit::end_table();
1855: } elsif ($target eq 'grade'
1856: && &Apache::response::submitted()
1857: && $Apache::lonhomework::type ne 'exam') {
1858: #
1859: # Actually grade
1860: #
1861: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1862:
1863: my $ad='';
1864: undef %Apache::functionplotresponse::functionplotrulelabels;
1865: $Apache::functionplotresponse::ruleslog='';
1866: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1867: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1868: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') {
1869: $ad='NOT_FUNCTION';
1870: } else {
1871: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1872: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1873: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1874: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1875:
1876: # We have a function that we can actually grade, go through the spline rules.
1877: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1878: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1879: $ad='INCORRECT';
1880: last;
1881: }
1882: }
1883: # And now go through the vector rules
1884: foreach my $rule (@Apache::functionplotresponse::functionplotvectorrules) {
1885: unless (&functionplotvectorrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1886: $ad='INCORRECT';
1887: last;
1888: }
1889: }
1890: # If it's not wrong, it's correct
1891: unless ($ad) { $ad='EXACT_ANS' };
1892: }
1893: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1894: &addlog("Assigned award detail: $ad");
1895: # Store for later to be assigned at end_functionplotresponse
1896: $Apache::functionplotresponse::awarddetail=$ad;
1897: }
1898: }
1899:
1900:
1901: sub end_functionplotresponse {
1902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1903: &Apache::response::end_response;
1904:
1905: my $result;
1906: my $id=$Apache::inputtags::response[-1];
1907: my $partid=$Apache::inputtags::part;
1908: my $internalid = $partid.'_'.$id;
1909:
1910: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1911: if ($target eq 'grade'
1912: && &Apache::response::submitted()
1913: && $Apache::lonhomework::type eq 'exam') {
1914:
1915: &Apache::response::scored_response($partid,$id);
1916:
1917: } elsif ($target eq 'grade'
1918: && &Apache::response::submitted()
1919: && $Apache::lonhomework::type ne 'exam') {
1920: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1921: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1922: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1923: #
1924: # Assign grade
1925: #
1926: my $ad=$Apache::functionplotresponse::awarddetail;
1927: #
1928: # Store grading info
1929: #
1930: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1931: &Apache::response::handle_previous(\%previous,$ad);
1932: } elsif ($target eq 'web') {
1933: undef @Apache::functionplotresponse::failedrules;
1934: }
1935: return $result;
1936: }
1937:
1938: sub end_functionplotelements {
1939: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1940: my $result='';
1941: my $id=$Apache::inputtags::response[-1];
1942: my $partid=$Apache::inputtags::part;
1943: my $internalid = $partid.'_'.$id;
1944: if ($target eq 'edit' ) {
1945: $result=&Apache::edit::end_table();
1946: } elsif ($target eq 'web') {
1947: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1948:
1949: # Are we in show answer mode?
1950: my $showanswer=&Apache::response::show_answer();
1951: if ($showanswer) {
1952: # Render answerdisplay
1953: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1954: if ($answerdisplay=~/\S/s) {
1955: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1956: my @components=split(/\s*\:\s*/,$plot);
1957: if ($#components<3) {
1958: # Just a simple plot
1959: my ($func,$xl,$xh)=@components;
1960: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1961: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1962: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1963: } else {
1964: # This is a spline
1965: $result.=&answer_spline_script($internalid,@components);
1966: }
1967: }
1968: }
1969: }
1970: my $fixed=0;
1971: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1972: # Now is the time to render all of the stored splines
1973: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1974: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1975: }
1976: # close the init script
1977: $result.=&end_init_script();
1978: # register all splines in this response
1979: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1980: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1981: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1982: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1983: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1984: }
1985: # generate the input fields
1986: $result.=$Apache::functionplotresponse::inputfields;
1987: # actually start the <applet>-tag
1988: $result.=&geogebra_startcode($internalid,
1989: &Apache::lonxml::get_param('width',$parstack,$safeeval,-2),
1990: &Apache::lonxml::get_param('height',$parstack,$safeeval,-2));
1991: # load the spline bytecode
1992: $result.=&geogebra_spline_program();
1993: # set default parameters
1994: $result.=&geogebra_default_parameters($internalid);
1995: # close the <applet>-tag
1996: $result.=&geogebra_endcode();
1997: }
1998: return $result;
1999: }
2000:
2001: sub boundaries {
2002: my ($parstack,$safeeval,$level)=@_;
2003: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
2004: $xmin=(defined($xmin)?$xmin:-10);
2005: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
2006: $xmax=(defined($xmax)?$xmax:10);
2007: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
2008: $ymin=(defined($ymin)?$ymin:-10);
2009: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
2010: $ymax=(defined($ymax)?$ymax:10);
2011: if ($xmax<=$xmin) {
2012: $xmax=$xmin+20;
2013: }
2014: if ($ymax<=$ymin) {
2015: $ymax=$ymin+20;
2016: }
2017: return ($xmin,$xmax,$ymin,$ymax);
2018: }
2019:
2020: sub start_functionplotelements {
2021: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2022: my $result='';
2023: my $id=$Apache::inputtags::response[-1];
2024: my $partid=$Apache::inputtags::part;
2025: my $internalid = $partid.'_'.$id;
2026:
2027: if ($target eq 'edit') {
2028: return &Apache::edit::start_table($token).
2029: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
2030: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
2031: .&Apache::edit::deletelist($target,$token).' '.
2032: &Apache::edit::insertlist($target,$token).' '
2033: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
2034: .'</span></td>'
2035: ."<td> "
2036: .&Apache::edit::end_row()
2037: .&Apache::edit::start_spanning_row()
2038: ."\n";
2039: } elsif ($target eq 'web') {
2040: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
2041: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2042: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2043: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2044: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
2045: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
2046:
2047:
2048: # paste in the update routine to receive stuff back from the applet
2049: $result.=&update_script($internalid);
2050: # start the initscript for this applet
2051: $result.=&start_init_script($internalid);
2052: # put the axis commands inside
2053: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
2054: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
2055: # init script is left open
2056: }
2057: return $result;
2058: }
2059:
2060: 1;
2061:
2062: __END__
2063:
2064: =head1 NAME
2065:
2066: Apache::functionplotresponse.pm;
2067:
2068: =head1 SYNOPSIS
2069:
2070: Handles tags associated with accepting function plots.
2071:
2072: This is part of the LearningOnline Network with CAPA project
2073: described at http://www.lon-capa.org.
2074:
2075: =head1 HANDLER SUBROUTINE
2076:
2077: start_functionplotresponse()
2078:
2079: =head1 OTHER SUBROUTINES
2080:
2081: =over
2082:
2083: =item end_functionplotresponse()
2084:
2085: =back
2086:
2087: =cut
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