Annotation of loncom/homework/functionplotresponse.pm, revision 1.71
1.1 www 1: # LearningOnline Network with CAPA
1.70 www 2: # Functionplot responses
1.1 www 3: #
1.71 ! www 4: # $Id: functionplotresponse.pm,v 1.70 2011/11/18 16:39:22 www Exp $
1.1 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::functionplotresponse;
30: use strict;
31: use Apache::response();
32: use Apache::lonlocal;
33: use Apache::lonnet;
1.65 www 34: use Apache::run;
1.36 www 35:
1.1 www 36: BEGIN {
1.37 www 37: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
1.70 www 38: 'plotobject','plotvector',
1.37 www 39: 'functionplotrule','functionplotruleset',
40: 'functionplotelements'));
1.1 www 41: }
42:
1.5 www 43: #
44: # There can be a number of applets on a page, each called ggbApplet_$id,
45: # where $id is the "_"-concatenated part and responseid
46: #
47:
1.1 www 48: sub geogebra_startcode {
1.3 www 49: my ($id)=@_;
1.1 www 50: return (<<ENDSTARTCODE);
1.3 www 51: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.40 www 52: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
1.1 www 53: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
54: ENDSTARTCODE
55: }
56:
57: sub geogebra_endcode {
1.2 www 58: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
59: }
60:
1.5 www 61: #
62: # This is the internal GeoGebra bytecode which defines the spline functions
63: #
1.2 www 64: sub geogebra_spline_program {
65: return (<<ENDSPLINEPROGRAM);
1.57 www 66: <param name="ggbBase64" value="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"/>
1.2 www 67: ENDSPLINEPROGRAM
68: }
69:
1.5 www 70: #
71: # The standard set of parameters inside <applet>
72: #
1.2 www 73: sub geogebra_default_parameters {
1.3 www 74: my ($id)=@_;
1.2 www 75: return(<<ENDDEFAULTPARAMETERS);
76: <param name="image" value="/adm/lonIcons/lonanim.gif" />
77: <param name="boxborder" value="false" />
78: <param name="centerimage" value="true" />
1.62 www 79: <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" />
1.69 www 80: <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" />
1.2 www 81: <param name="framePossible" value="false" />
82:
83: <param name="showResetIcon" value="false" />
84: <param name="showAnimationButton" value="false" />
85: <param name="enableRightClick" value="false" />
86: <param name="errorDialogsActive" value="true" />
87: <param name="enableLabelDrags" value="false" />
88: <param name="showMenuBar" value="false" />
89: <param name="showToolBar" value="false" />
90: <param name="showToolBarHelp" value="false" />
91: <param name="showAlgebraInput" value="false" />
92: <param name="enableShiftDragZoom" value="false" />
93: <param name="allowRescaling" value="false" />
94: <param name="enableLabelDrags" value="false" />
1.3 www 95: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 96: ENDDEFAULTPARAMETERS
1.1 www 97: }
98:
1.5 www 99: #
100: # This subroutine is called by LON-CAPA at </problem>
101: # Each applet on the page will call function ggbOnInit when it is done loading
102: # This function in turn will call the respective function registered by start_init_script
103: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
104: #
105:
1.3 www 106: sub init_script {
1.16 www 107: if ($#Apache::functionplotresponse::callscripts>=0) {
108: my $script='';
109: foreach my $id (@Apache::functionplotresponse::callscripts) {
110: $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
111: }
112: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
1.52 www 113: ") { setTimeout('ggbInitAll()',200) }";
1.16 www 114: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 115: return (<<ENDGGBINIT);
116: <script type="text/javascript">
117: // <![CDATA[
1.16 www 118: // Function that each applet will call when loaded
119: // It will pass "its" parameter
120: // Set flags for when an applet is loaded, wait till all are loaded, and then some
1.3 www 121: function ggbOnInit(param) {
1.16 www 122: $script
123: }
124: function ggbInitAll() {
1.17 www 125: $calls
1.3 www 126: }
127: // ]]>
128: </script>
129: ENDGGBINIT
130: }
131: }
132:
1.5 www 133: #
134: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 135: # Changes the hidden fields on the web page
1.5 www 136: #
137: sub update_script {
138: my ($id)=@_;
139: return (<<ENDUPDATESCRIPT);
140: <script type="text/javascript">
141: // <![CDATA[
142: function updatePointCoordinates_$id(coordinateName) {
143: var x = document.ggbApplet_$id.getXcoord(coordinateName);
144: var y = document.ggbApplet_$id.getYcoord(coordinateName);
1.9 www 145: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
146: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 147: }
148: // ]]>
149: </script>
150: ENDUPDATESCRIPT
151: }
152:
153: #
154: # Register the above update-handler for a variable
155: #
156:
157: sub update_register {
158: my ($id,$variable)=@_;
1.6 www 159: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
160: }
161:
162: #
1.40 www 163: # Set a point coordinate variable
1.6 www 164: #
1.40 www 165: sub set_point_coordinate {
1.48 www 166: my ($id,$variable,$x,$y,$fixed)=@_;
167: my $mult=($fixed?'a*':'');
1.68 www 168: # Get rid of wild exponents, make sure it's a number
169: $x=1.*$x;
170: $y=1.*$y;
171: # GeoGebra does not understand "E"
172: $x=~s/[e|E]/\*10\^/;
173: $x=~s/\+//;
174: $y=~s/[e|E]/\*10\^/;
175: $y=~s/\+//;
1.6 www 176: return (<<ENDSETVARIABLE);
1.48 www 177: document.ggbApplet_$id.evalCommand("a=1");
178: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
1.40 www 179: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 180: ENDSETVARIABLE
181: }
182:
183: #
1.40 www 184: # Set a slope coordinate variable
185: #
186: sub set_slope_coordinate {
1.48 www 187: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
1.40 www 188: my $xvariable=$variable.'x';
189: my $yvariable=$variable.'y';
190: my $domain=$xmax-$xmin;
191: my $range=$ymax-$ymin;
192: my $xinterval=$domain/100.;
193: my $yinterval=$range/200.;
1.48 www 194: my $mult=($fixed?'a*':'');
1.40 www 195: return (<<ENDSETSVARIABLE);
1.48 www 196: document.ggbApplet_$id.evalCommand("a=1");
1.51 www 197: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
1.40 www 198: document.ggbApplet_$id.setVisible("$xvariable", false);
199: document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
200: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
201: document.ggbApplet_$id.setVisible("$yvariable", false);
202: document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
1.48 www 203: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
1.40 www 204: document.ggbApplet_$id.setLabelVisible("$variable", false);
205: ENDSETSVARIABLE
206: }
207:
208: #
1.9 www 209: # Input field name for a coordinate variable
210: #
211:
212: sub field_name {
213: my ($id,$variable,$name)=@_;
214: return "HWVAL_$id\_$variable\_$name";
215: }
216:
217: #
218: # Generate an input field for a coordinate variable
219: #
220:
221: sub generate_input_field {
222: my ($id,$variable,$x,$y)=@_;
223: $Apache::functionplotresponse::inputfields.=
224: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
225: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
226: }
227:
228: #
1.40 www 229: # Initialize a new point coordinate variable at set a listener on it
1.6 www 230: #
1.40 www 231: sub new_point_coordinate {
1.48 www 232: my ($id,$variable,$x,$y,$fixed)=@_;
1.11 www 233: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 234: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
235: }
1.11 www 236: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 237: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
238: }
1.9 www 239: &generate_input_field($id,$variable,$x,$y);
1.48 www 240: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
1.40 www 241: }
242:
243: #
244: # Initialize a new slope coordinate variable at set a listener on it
245: #
246: sub new_slope_coordinate {
1.48 www 247: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.40 www 248: #
249: # $variable: name of the slope point
250: # $x, $y: coordinates of the slope point
251: # $pointname: name of the associated point point
252: # $xp $yp: coordinates of the point point
253: #
254: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
255: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
256: }
257: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
258: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
259: }
260: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
261: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
262: }
263: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
264: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
265: }
266:
267: &generate_input_field($id,$variable,$x,$y);
268: my $xrel=$x-$xp;
269: my $yrel=$y-$yp;
1.48 www 270: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
1.5 www 271: }
272:
273: #
274: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
275: # It then starts the right headers
276: #
1.3 www 277: sub start_init_script {
278: my ($id)=@_;
1.16 www 279: # Add id to the list of ggbInit_$id functions that need to be called
280: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 281: # ... and open this function
1.3 www 282: return (<<ENDSTARTINIT);
283: <script type="text/javascript">
284: // <![CDATA[
1.5 www 285: // variable that will eventually be passed back to the server
286: var coordinateMap_$id = [];
1.16 www 287: // flag for not loaded yet
288: var loaded_$id=false;
1.5 www 289: // Init-function for applet
1.3 www 290: function ggbInit_$id() {
291: ENDSTARTINIT
292: }
293:
1.5 www 294: #
295: # This sets the axes inside ggbInit_$id
296: #
297:
1.4 www 298: sub axes_script {
299: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
300: return (<<ENDAXESSCRIPT);
301: // changes (xmin, xmax, ymin, ymax)
302: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
303:
304: // makes the (x,y) axis (in)visible
305: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
306: // makes the grid (in)visible
307: document.ggbApplet_$id.setGridVisible($gvisible);
308: ENDAXESSCRIPT
309: }
310:
1.14 www 311: sub axes_label {
1.45 www 312: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
1.14 www 313: unless ($xlabel || $ylabel) { return ''; }
314: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
315: if ($xlabel) {
1.45 www 316: if (($ymin<0) && ($ymax>0)) {
1.14 www 317: $return.=(<<ENDXAXISLABELSCRIPT);
318: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
319: document.ggbApplet_$id.setVisible("Xlabel",false);
320: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
321: ENDXAXISLABELSCRIPT
1.45 www 322: } else {
323: $return.=(<<ENDXOFFAXISLABEL);
324: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
325: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
326: ENDXOFFAXISLABEL
327: }
1.14 www 328: }
329: if ($ylabel) {
1.45 www 330: if (($xmin<0) && ($xmax>0)) {
1.14 www 331: $return.=(<<ENDYAXISLABELSCRIPT);
332: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
333: document.ggbApplet_$id.setVisible("Ylabel",false);
334: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
335: ENDYAXISLABELSCRIPT
1.45 www 336: } else {
337: $return.=(<<ENDYOFFAXISLABEL);
338: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
339: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
340: ENDYOFFAXISLABEL
341: }
1.14 www 342: }
343: return $return;
344: }
345:
1.58 www 346: #
347: # Subroutine to produce background and answer plots
348: #
349:
1.4 www 350: sub plot_script {
1.47 www 351: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
1.41 www 352: $label=~s/\W//g;
353: if (($label) && ($label!~/^[A-Za-z]/)) {
354: $label='C'.$label;
355: }
356: my $visible=0;
357: if ($label) {
358: $visible="1";
359: } else {
360: $Apache::functionplotresponse::counter++;
361: $label='C'.$Apache::functionplotresponse::counter;
362: }
1.46 www 363: my $rc=0;
364: my $gc=0;
365: my $bc=0;
366: if ($color) {
367: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
368: $rc=hex($rh);
369: $gc=hex($gh);
370: $bc=hex($bh);
371: }
1.6 www 372: if ($fixed) {
1.43 www 373: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
1.46 www 374: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
1.47 www 375: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
376: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
1.6 www 377: } else {
1.46 www 378: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
1.6 www 379: }
1.4 www 380: }
381:
1.5 www 382: #
1.70 www 383: # Subroutine to produce objects
384: #
385:
386: sub plotobject_script {
387: my ($id,$label,$x,$y)=@_;
388: unless ($label) {
389: $Apache::functionplotresponse::counter++;
390: $label='O'.$Apache::functionplotresponse::counter;
391: }
392: return "document.ggbApplet_$id.evalCommand('a=1');\n".
393: "document.ggbApplet_$id.setVisible('a', false);\n".
394: "document.ggbApplet_$id.setLabelVisible('a', false);\n".
395: "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n".
396: "document.ggbApplet_$id.setVisible('$label', true);\n".
397: "document.ggbApplet_$id.setLabelVisible('$label', true);\n";
398: }
399:
400: #
401: # Subroutine to produce vectors
402: #
403:
404: sub plotvector_script {
405: my ($id,$label,$xs,$ys,$xe,$ye)=@_;
406: unless ($label) {
407: $Apache::functionplotresponse::counter++;
408: $label='V'.$Apache::functionplotresponse::counter;
409: }
1.71 ! www 410: my $startlabel=$label.'Start';
! 411: my $endlabel=$label.'End';
! 412: my $pointlabel=$label.'Point';
! 413: my $anglelabel=$label.'Angle';
1.70 www 414: return(<<ENDVECTOR);
1.71 ! www 415: document.ggbApplet_$id.evalCommand("$startlabel=($xs,$ys)");
! 416: document.ggbApplet_$id.setVisible("$startlabel",false);
! 417: document.ggbApplet_$id.setLabelVisible("$startlabel",false);
! 418: document.ggbApplet_$id.evalCommand("$endlabel=($xe,$ye)");
! 419: document.ggbApplet_$id.setLabelVisible("$endlabel",false);
! 420: document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]");
! 421: document.ggbApplet_$id.setLabelVisible("$label",true);
! 422: document.ggbApplet_$id.setLineThickness("$label",8);
1.70 www 423: // Displays the Angle
1.71 ! www 424: //document.ggbApplet1.evalCommand("Gravitypoint=(110,y(Gravitystart))"); //The x-value for this should be 2*(xmax-xmin)+xmax;
! 425: //document.ggbApplet1.evalCommand("GravityAngle=Angle[Gravitypoint,Gravitystart,Gravityend]");
! 426: //document.ggbApplet1.setLabelVisible("GravityAngle",true);
! 427: //document.ggbApplet1.setLabelStyle("GravityAngle",VALUE=2);
1.70 www 428: // Keeps track of points we care about (This should use the same listener function we use in graph problems)
429: //document.ggbApplet1.registerObjectUpdateListener('Gravitystart','updatePointCoordinates');
430: //document.ggbApplet1.registerObjectUpdateListener('Gravityend','updatePointCoordinates');
431: //document.ggbApplet1.registerObjectUpdateListener('GravityAngle','updatePointCoordinates');
432: ENDVECTOR
433: }
434:
435: #
1.58 www 436: # Answer spline display
437: #
438: # points: x,y,slope_x,slope_y
439:
440: sub answer_spline_script {
441: my ($id,@points)=@_;
442: my $order=int(($#points+1)/4);
443: if ($order<2) { $order=2; }
444: if ($order>8) { $order=8; }
445: $Apache::functionplotresponse::counter++;
1.60 www 446: my $label='CSpline'.$Apache::functionplotresponse::counter;
1.59 www 447: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'[';
448: for (my $i=0;$i<=$#points;$i+=4) {
449: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),";
450: }
451: $output=~s/\,$//;
452: $output.=']");'."\n";
453: for (my $i=2; $i<2*$order; $i+=2) {
1.61 www 454: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n";
1.59 www 455: }
1.60 www 456: for (my $i=1; $i<2*$order; $i+=2) {
1.61 www 457: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n";
1.60 www 458: }
459:
1.59 www 460: return $output;
1.58 www 461: }
462:
463: #
1.7 www 464: # Subroutine that generates code for spline $label based on stored information
1.6 www 465: #
466:
467: sub generate_spline {
1.48 www 468: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.6 www 469: my $result='';
1.7 www 470: my $order=$Apache::functionplotresponse::splineorder{$label};
471: my $x=$Apache::functionplotresponse::splineinitx{$label};
472: my $y=$Apache::functionplotresponse::splineinity{$label};
473: my $sx=$Apache::functionplotresponse::splinescalex{$label};
474: my $sy=$Apache::functionplotresponse::splinescaley{$label};
475: my @coords=();
476: foreach my $i (1..$order) {
1.48 www 477: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
1.40 www 478: my $xp=$x;
1.8 www 479: $x+=$sx/(2.*($order-1));
1.7 www 480: push(@coords,$label.'P'.$i);
1.48 www 481: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
1.8 www 482: $x+=$sx/(2.*($order-1));
1.7 www 483: push(@coords,$label.'S'.$i);
484: }
485: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 486: return $result;
487: }
1.70 www 488:
489: #
490: # Object
491: #
492:
493: sub start_plotobject {
494: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
495: my $result='';
496: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
497: my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval);
498: my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval);
499: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
500: $label=~s/\W//gs;
501: $label=ucfirst($label);
502: unless ($label) { $label="NewObject"; }
503: if ($target eq 'web') {
504: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
505: unless (defined($x)) { $x=$xmin; }
506: unless (defined($y)) { $y=$ymin; }
507: $result.=&plotobject_script($internalid,$label,$x,$y);
508: } elsif ($target eq 'edit') {
509: $result=&Apache::edit::tag_start($target,$token,'Plot Object').
510: &Apache::edit::text_arg('Label on Plot:','label',
511: $token,'16').
512: &Apache::edit::text_arg('x:','x',
513: $token,'8').
514: &Apache::edit::text_arg('y:','y',
515: $token,'8').
516: &Apache::edit::end_row();
517: } elsif ($target eq 'modified') {
518: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','x','y');
519: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
520: }
521: return $result;
522: }
523:
524: sub end_plotobject {
525: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
526: my $result='';
527: if ($target eq 'edit') {
528: $result=&Apache::edit::end_table();
529: }
530: return $result;
531: }
532:
1.71 ! www 533: #
! 534: # Vector
! 535: #
! 536:
! 537: sub start_plotvector {
! 538: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
! 539: my $result='';
! 540: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
! 541: my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval);
! 542: my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval);
! 543: my $tipx=&Apache::lonxml::get_param('tipx',$parstack,$safeeval);
! 544: my $tipy=&Apache::lonxml::get_param('tipy',$parstack,$safeeval);
! 545:
! 546: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
! 547: $label=~s/\W//gs;
! 548: $label=ucfirst($label);
! 549: unless ($label) { $label="NewVector"; }
! 550: if ($target eq 'web') {
! 551: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
! 552: unless (defined($tailx)) { $tailx=$xmin; }
! 553: unless (defined($taily)) { $taily=$ymin; }
! 554: unless (defined($tipx)) { $tipx=$xmin; }
! 555: unless (defined($tipy)) { $tipy=$ymin; }
! 556: $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy);
! 557: } elsif ($target eq 'edit') {
! 558: $result=&Apache::edit::tag_start($target,$token,'Plot Vector').
! 559: &Apache::edit::text_arg('Label on Plot:','label',
! 560: $token,'16').
! 561: &Apache::edit::text_arg('Tail x:','tailx',
! 562: $token,'8').
! 563: &Apache::edit::text_arg('Tail y:','taily',
! 564: $token,'8').
! 565: &Apache::edit::text_arg('Tip x:','tipx',
! 566: $token,'8').
! 567: &Apache::edit::text_arg('Tip y:','tipy',
! 568: $token,'8').
! 569:
! 570: &Apache::edit::end_row();
! 571: } elsif ($target eq 'modified') {
! 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 $result;
! 585: }
! 586:
! 587:
1.70 www 588:
1.6 www 589: #
590: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 591: #
1.4 www 592: sub start_backgroundplot {
593: my ($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);
1.47 www 597: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
598: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
1.41 www 599: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.46 www 600: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
601: $color=~s/[^a-fA-F0-9]//gs;
602: unless (length($color)==6) { $color=''; }
1.6 www 603: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
604:
1.4 www 605: unless ($function) { $function="0"; }
606: if ($target eq 'web') {
1.41 www 607: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
1.47 www 608: unless (defined($xinitial)) { $xinitial=$xmin; }
609: unless (defined($xfinal)) { $xfinal=$xmax; }
610: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
1.13 www 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').
1.47 www 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').
1.41 www 619: &Apache::edit::text_arg('Label on Plot:','label',
620: $token,'8').
1.46 www 621: &Apache::edit::text_arg('Color (hex code):','color',
622: $token,'8').
1.13 www 623: &Apache::edit::select_arg('Fixed location:','fixed',
624: ['yes','no'],$token).
625: &Apache::edit::end_row();
626: } elsif ($target eq 'modified') {
627: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.47 www 628: $safeeval,'function','label','xinitial','xfinal','color','fixed');
1.13 www 629: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
630: }
631: return $result;
1.4 www 632: }
633:
634: sub end_backgroundplot {
1.13 www 635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
636: my $result='';
637: if ($target eq 'edit') {
638: $result=&Apache::edit::end_table();
639: }
640: return $result;
1.6 www 641: }
642:
643: #
1.25 www 644: # <functionplotrule ... />
1.12 www 645: #
1.25 www 646: sub start_functionplotrule {
1.12 www 647: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
648: my $result='';
1.24 www 649: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
650: $Apache::functionplotresponse::counter++;
651: if ($label=~/\W/) {
1.25 www 652: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 653: }
654: $label=~s/\W//gs;
655: unless ($label) {
656: $label='R'.$Apache::functionplotresponse::counter;
657: } else {
658: $label='R'.$label;
659: }
660: if ($Apache::functionplotresponse::splineorder{$label}) {
1.25 www 661: &Apache::lonxml::error(&mt('Rule indices must be unique.'));
1.24 www 662: }
663:
664:
665: if ($target eq 'grade') {
666: # Simply remember - in order - for later
1.25 www 667: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
668: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
1.24 www 669: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
1.25 www 670: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
1.24 www 671: }
672: $beginninglabel=~s/\W//gs;
673: $endinglabel=~s/\W//gs;
674: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
675: $relationship=~s/\W//gs;
676: $relationship=lc($relationship);
677: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
1.25 www 678: &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
1.24 www 679: $relationship='eq';
680: }
1.35 www 681: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
1.42 www 682: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
1.25 www 683: &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
1.24 www 684: $derivative=0;
685: }
1.25 www 686: push(@Apache::functionplotresponse::functionplotrules,join(':',(
1.24 www 687: $label,
688: $derivative,
1.25 www 689: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
1.24 www 690: $beginninglabel,
1.25 www 691: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
1.24 www 692: $endinglabel,
1.35 www 693: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
694: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
1.24 www 695: $relationship,
1.33 www 696: &Apache::lonxml::get_param('value',$parstack,$safeeval),
697: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
1.24 www 698: )));
699: } elsif ($target eq 'edit') {
1.29 www 700: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
1.36 www 701: &Apache::edit::text_arg('Index/Name:','index',
702: $token,'10').' '.
1.35 www 703: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
1.29 www 704: [['0','Function itself'],
705: ['1','First derivative'],
1.42 www 706: ['2','Second derivative'],
707: ['-1','Integral']],$token).'<br />'.
1.44 www 708: &Apache::edit::text_arg('Initial x-value:','xinitial',
1.35 www 709: $token,'8').
1.44 www 710: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
711: [['start','Start of Plot'],
712: ['end','End of Plot']],$token,'8').'<br />'.
1.30 www 713:
1.44 www 714: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
1.35 www 715: $token,'8').
1.44 www 716: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
1.32 www 717: [['end','End of Plot']],$token,'8').'<br />'.
1.44 www 718: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
1.35 www 719: $token,'8').
1.44 www 720: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
1.35 www 721: $token,'8').'<br />'.
1.38 www 722: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
1.29 www 723: [['eq','equal'],
724: ['ne','not equal'],
725: ['ge','greater than or equal'],
726: ['gt','greater than'],
727: ['lt','less than'],
728: ['le','less than or equal']],$token).
729: $result.= &Apache::edit::select_or_text_arg('Value:','value',
1.65 www 730: [['undef','not defined']],$token,'30').
1.29 www 731: &Apache::edit::text_arg('Percent error:','percenterror',
1.35 www 732: $token,'8').
1.29 www 733: &Apache::edit::end_row();
734: } elsif ($target eq 'modified') {
1.54 www 735: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
1.53 www 736: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
737: }
1.54 www 738: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
1.53 www 739: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
740: }
1.29 www 741: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.35 www 742: $safeeval,'index','derivativeorder',
743: 'xinitial','xinitiallabel','xfinal','xfinallabel',
744: 'minimumlength','maximumlength',
745: 'relationship','value','percenterror');
1.29 www 746: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.13 www 747: }
1.12 www 748: return $result;
749: }
750:
1.25 www 751: sub end_functionplotrule {
1.13 www 752: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
753: my $result='';
754: if ($target eq 'edit') {
755: $result=&Apache::edit::end_table();
756: }
757: return $result;
1.12 www 758: }
759:
760:
761: #
1.23 www 762: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 763: #
764: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
765: #
766: sub start_spline {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 768: my $result='';
769: if ($target eq 'web') {
1.23 www 770: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 771: $Apache::functionplotresponse::counter++;
772: if ($label=~/\W/) {
1.23 www 773: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 774: }
775: $label=~s/\W//gs;
1.23 www 776: unless ($label) {
777: $label='S'.$Apache::functionplotresponse::counter;
778: } else {
779: $label='S'.$label;
780: }
1.13 www 781: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 782: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 783: }
784:
785: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
786: if ($order<2) { $order=2; }
787: if ($order>8) { $order=8; }
788: $Apache::functionplotresponse::splineorder{$label}=$order;
789:
790: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
791: unless ($x) { $x=0; }
792: $Apache::functionplotresponse::splineinitx{$label}=$x;
793:
794: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
795: unless ($y) { $y=0; }
796: $Apache::functionplotresponse::splineinity{$label}=$y;
797:
798: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
799: unless ($sx) { $sx=$order; }
800: $Apache::functionplotresponse::splinescalex{$label}=$sx;
801:
802: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
803: unless ($sy) { $sy=2; }
804: $Apache::functionplotresponse::splinescaley{$label}=$sy;
805: } elsif ($target eq 'edit') {
806: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 807: &Apache::edit::text_arg('Index:','index',
1.14 www 808: $token,'4').' '.
1.13 www 809: &Apache::edit::select_arg('Order:','order',
1.44 www 810: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 811: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 812: $token,'4').' '.
1.13 www 813: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 814: $token,'4').' '.
1.13 www 815: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 816: $token,'4').' '.
1.13 www 817: &Apache::edit::text_arg('Scale y:','scaley',
818: $token,'4').
819: &Apache::edit::end_row();
820: } elsif ($target eq 'modified') {
821: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 822: $safeeval,'index','order','initx','inity',
1.13 www 823: 'scalex','scaley');
824: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
825: }
826: return $result;
1.6 www 827: }
828:
829: sub end_spline {
1.13 www 830: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
831: my $result='';
832: if ($target eq 'edit') {
833: $result=&Apache::edit::end_table();
834: }
835: return $result;
1.4 www 836: }
837:
1.3 www 838: sub end_init_script {
839: return (<<ENDENDINIT);
840: }
841: // ]]>
842: </script>
843: ENDENDINIT
844: }
845:
1.10 www 846: #
847: # Storing and restoring spline coordinates from part answers
848: #
849: sub decode_previous_answer {
850: my ($answer)=@_;
851: foreach my $coordinate (split(/\,/,$answer)) {
852: my ($key,$value)=split(/\=/,$coordinate);
853: $Apache::functionplotresponse::previous{$key}=$value;
854: }
855: }
856:
857: sub get_answer_from_form_fields {
858: my ($id)=@_;
859: my $answer='';
860: my %coords=();
861: foreach my $field (keys(%env)) {
862: if ($field=~/^form\.HWVAL\_$id/) {
863: $field=~/^form\.(.*)$/;
864: $coords{$1}=$env{$field};
865: }
866: }
867: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
868: return ($answer,%coords);
869: }
870:
1.15 www 871: #
872: # The following functions calculate the cubic-hermite splines server-side
873: #
874:
875: sub cubic_hermite {
876: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 877: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
878: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 879: }
880:
881: #
882: # d/dt(...)
883: #
884:
885: sub ddt_cubic_hermite {
886: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 887: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
888: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 889: }
890:
891: #
892: # d^2/dt^2(...)
893: #
894:
895: sub d2dt2_cubic_hermite {
896: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 897: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
898: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 899: }
900:
901: #
1.18 www 902: # Array index calculation
903: #
904: sub array_index {
905: my ($xmin,$xmax,$x)=@_;
1.38 www 906: if ($x ne '') {
907: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
908: } else {
909: return undef;
910: }
1.20 www 911: }
912:
913: #
1.18 www 914: # Populate the arrays
915: #
916:
917: sub populate_arrays {
1.64 www 918: my ($id,$xmin,$xmax,$ymin,$ymax)=@_;
1.26 www 919: for (my $i=0; $i<=400; $i++) {
1.35 www 920: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 921: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 922: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 923: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 924: }
1.19 www 925: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 926: # Run over all splines in response
927: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 928: my $xiold=-1;
1.18 www 929: # Run over all points in spline
1.19 www 930: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 931: my $ni=$i+1;
932: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
933: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
934: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
935: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
936: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
937: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
938: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
939: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
940: # Run in small steps over spline parameter
1.26 www 941: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 942: my $xreal=&cubic_hermite($t,@xparms);
943: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 944: if ($xi<$xiold) { return 'no_func'; }
1.26 www 945: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.18 www 946: $xiold=$xi;
1.35 www 947: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 948: # Function value
1.30 www 949: my $funcval=&cubic_hermite($t,@yparms);
1.64 www 950:
951: # Do we already have a value for this point, and is it different from the new one?
952: if ((defined($Apache::functionplotresponse::func[$xi])) &&
953: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) {
954: return 'no_func';
955: }
956: # Okay, remember the new point
1.30 www 957: $Apache::functionplotresponse::func[$xi]=$funcval;
1.64 www 958:
1.30 www 959: if (defined($funcval)) {
960: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
961: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
962: }
963: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
964: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
965: }
966: }
1.28 www 967: # Chain rule
1.22 www 968: # dy/dx=dy/dt/(dx/dt)
969: my $dxdt=&ddt_cubic_hermite($t,@xparms);
970: if ($dxdt) {
971: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 972: # Second derivative
1.28 www 973: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 974: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
975: ($dxdt*$dxdt*$dxdt);
1.22 www 976: }
1.18 www 977: }
978: }
979: }
980: }
981: }
982:
983: #
1.37 www 984: # Implementation of <functionplotresponse>
1.15 www 985: #
986:
1.1 www 987: sub start_functionplotresponse {
988: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
989: my $result='';
1.6 www 990: # To remember the splines - somehow, they need to come last
991: undef %Apache::functionplotresponse::splineorder;
992: undef %Apache::functionplotresponse::splineinitx;
993: undef %Apache::functionplotresponse::splineinity;
994: undef %Apache::functionplotresponse::splinescalex;
995: undef %Apache::functionplotresponse::splinescaley;
1.10 www 996: # Remember input fields, etc
997: undef %Apache::functionplotresponse::previous;
1.9 www 998: $Apache::functionplotresponse::inputfields='';
1.6 www 999: $Apache::functionplotresponse::counter=0;
1.24 www 1000: # Remember rules
1.25 www 1001: undef @Apache::functionplotresponse::functionplotrules;
1.37 www 1002: # Remember failed rules
1003: if ($target eq 'grade') {
1004: undef @Apache::functionplotresponse::failedrules;
1005: }
1006: # Delete previous awards
1007: undef $Apache::functionplotresponse::awarddetail;
1.10 www 1008: # Part and ID
1009: my $partid=$Apache::inputtags::part;
1010: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 1011: # Internal ID to mark the applet and its coordinates
1.10 www 1012: my $internalid = $partid.'_'.$id;
1013: # Previous answer
1014: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
1015:
1.6 www 1016: # Parameters of <functionplotresponse>
1.41 www 1017: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 1018: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1019: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1020: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 1021: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
1022: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 1023: if ($target eq 'edit') {
1024: $result.=&Apache::edit::start_table($token)
1025: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
1026: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 1027: .&Apache::edit::deletelist($target,$token).' '
1.50 www 1028: .&Apache::edit::insertlist($target,$token).' '
1029: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1.12 www 1030: .'</span></td>'
1031: ."<td> "
1032: .&Apache::edit::end_row()
1033: .&Apache::edit::start_spanning_row()
1034: ."\n";
1.14 www 1035: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
1036: $token,'6').' '.
1037: &Apache::edit::text_arg('Minimum x-value:','xmin',
1038: $token,'4').' '.
1.12 www 1039: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 1040: $token,'4').' '.
1.12 www 1041: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 1042: ['yes','no'],$token).'<br />'.
1.14 www 1043: &Apache::edit::text_arg('Label y-axis:','ylabel',
1044: $token,'6').' '.
1.12 www 1045: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 1046: $token,'4').' '.
1.12 www 1047: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 1048: $token,'4').' '.
1.12 www 1049: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 1050: ['yes','no'],$token).'<br />'.
1.12 www 1051: &Apache::edit::select_arg('Grid visible:','gridvisible',
1.47 www 1052: ['yes','no'],$token).'<br />'.
1.58 www 1053: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1.63 raeburn 1054: 'answerdisplay',$token,'50').
1.12 www 1055: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1056: } elsif ($target eq 'modified') {
1057: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.14 www 1058: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
1.47 www 1059: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1.12 www 1060: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 1061:
1.12 www 1062: } elsif ($target eq 'meta') {
1.10 www 1063: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 1064: } elsif (($target eq 'answer') &&
1065: ($env{'form.answer_output_mode'} ne 'tex') &&
1066: ($Apache::lonhomework::viewgrades == 'F')) {
1067: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
1068: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
1069: my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
1070: {'only_body' => 1,
1071: 'bgcolor' => '#FFFFFF',
1072: 'js_ready' => 1,});
1073: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
1074: $uname =~s/\W//g;
1075: $udom =~s/\W//g;
1076: my $function_name =
1077: join('_','LONCAPA_scriptvars',$uname,$udom,
1078: $env{'form.counter'},$Apache::lonxml::curdepth);
1079: my $rules_var ="<script type=\"text/javascript\">
1080: // <![CDATA[
1081: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
1082: $Apache::functionplotresponse::ruleslog.
1083: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
1084: // ]]>
1085: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
1086: &Apache::lonxml::add_script_result($rules_var);
1087: }
1088:
1.1 www 1089: return $result;
1090: }
1091:
1.25 www 1092: sub compare_rel {
1.26 www 1093: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 1094: # is the real value undefined?
1.26 www 1095: unless (defined($realval)) {
1.36 www 1096: # the real value is not defined
1.26 www 1097: if ($relationship eq 'eq') {
1098: if ($value eq 'undef') {
1099: return 1;
1100: } else {
1101: return 0;
1102: }
1103: } elsif ($relationship eq 'ne') {
1104: if ($value eq 'undef') {
1105: return 0;
1106: } else {
1107: return 1;
1108: }
1109: } else {
1110: return 0;
1111: }
1112: }
1113:
1.36 www 1114: # is the expected value undefined?
1115: if ($value eq 'undef') {
1116: # but by now we know that the real value is defined
1117: return 0;
1118: }
1119:
1120: # both are defined.
1.26 www 1121: if ($relationship eq 'gt') {
1122: return ($realval>$value);
1123: } elsif ($relationship eq 'ge') {
1124: return ($realval>$value-$tol);
1125: } elsif ($relationship eq 'lt') {
1126: return ($realval<$value);
1127: } elsif ($relationship eq 'le') {
1128: return ($realval<$value+$tol);
1129: } elsif ($relationship eq 'ne') {
1130: return (abs($value-$realval)>$tol);
1131: } else {
1132: return (abs($value-$realval)<$tol);
1133: }
1.25 www 1134: return 0;
1135: }
1136:
1.35 www 1137: sub addlog {
1138: my ($text)=@_;
1.67 www 1139: $text=~s/\'/\\\'/g;
1.35 www 1140: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
1141: }
1142:
1143: sub actualval {
1144: my ($i,$xmin,$xmax)=@_;
1145: return $xmin+$i/400.*($xmax-$xmin);
1146: }
1.65 www 1147:
1.66 www 1148: sub fpr_val {
1149: my ($arg)=@_;
1150: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg},
1151: $Apache::functionplotresponse::fpr_xmin,
1152: $Apache::functionplotresponse::fpr_xmax);
1153: }
1154:
1.65 www 1155: sub fpr_f {
1156: my ($arg)=@_;
1157: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin,
1158: $Apache::functionplotresponse::fpr_xmax,
1159: $arg)];
1160: }
1161:
1162: sub fpr_dfdx {
1163: my ($arg)=@_;
1164: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin,
1165: $Apache::functionplotresponse::fpr_xmax,
1166: $arg)];
1167: }
1168:
1169: sub fpr_d2fdx2 {
1170: my ($arg)=@_;
1171: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin,
1172: $Apache::functionplotresponse::fpr_xmax,
1173: $arg)];
1174: }
1.35 www 1175:
1.25 www 1176: sub functionplotrulecheck {
1.65 www 1177: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1.33 www 1178:
1.35 www 1179: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 1180: =split(/\:/,$rule);
1.33 www 1181: $percent=($percent>0?$percent:5);
1.35 www 1182: &addlog("=================");
1.42 www 1183: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.65 www 1184: #
1185: # Evaluate the value
1186: #
1187: if ($value=~/\D/) {
1188: $Apache::functionplotresponse::fpr_xmin=$xmin;
1189: $Apache::functionplotresponse::fpr_xmax=$xmax;
1190: $value=&Apache::run::run($value,$safeeval);
1191: &addlog("Value evaluated to $value");
1192: }
1193:
1194: #
1195: # Minimum and maximum lengths of the interval
1196: #
1.49 www 1197: if ((defined($minimumlength)) || (defined($maximumlength))) {
1198: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
1199: }
1.30 www 1200: my $li=0;
1201: my $lh=400;
1202:
1.31 www 1203: # Special case: the upper boundary was not defined
1204: # and needs to be set to the value where
1205: # the condition is not true anymore => set flag
1206:
1207: my $findupper=0;
1208: if (($xfinal eq '')
1209: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
1210: && ($xfinallabel)) {
1211: $findupper=1;
1212: }
1213:
1.25 www 1214: # if a hard value is set for the boundaries, it overrides the label
1.30 www 1215: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
1216: $li=&array_index($xmin,$xmax,$xinitial);
1217: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
1218: }
1219: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
1220: $lh=&array_index($xmin,$xmax,$xfinal);
1221: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 1222: }
1.31 www 1223: # if the label is defined, use it
1.25 www 1224: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 1225: &addlog("Using lower label $xinitiallabel");
1.30 www 1226: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1227: } else {
1228: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 1229: }
1.31 www 1230: unless ($findupper) {
1231: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 1232: &addlog("Using upper label $xfinallabel");
1.33 www 1233: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 1234: } else {
1235: $lh=&array_index($xmin,$xmax,$xfinal);
1236: }
1.25 www 1237: }
1238: # Basic sanity checks
1.30 www 1239: if ($li<0) { $li=0; }
1240: if ($lh>400) { $lh=400; }
1.38 www 1241: if (($li>$lh) || (!defined($lh))) {
1.30 www 1242: $lh=$li;
1.25 www 1243: }
1.31 www 1244:
1.35 www 1245: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1246: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1247: if ($findupper) {
1248: &addlog("Looking for label $xfinallabel");
1249: }
1.33 www 1250: my $tol=$percent*($ymax-$ymin)/100;
1251: if ($xmax>$xmin) {
1252: if ($derivative==2) {
1253: $tol=4.*$tol/($xmax-$xmin);
1254: } elsif ($derivative==1) {
1255: $tol=2.*$tol/($xmax-$xmin);
1.42 www 1256: } elsif ($derivative==-1) {
1257: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 1258: }
1.27 www 1259: }
1.42 www 1260: my $integral=0;
1261: my $binwidth=($xmax-$xmin)/400.;
1262: if (($derivative<0) && (!$findupper)) {
1263: # definite integral, calculate over whole length
1264: &addlog("Calculating definite integral");
1265: for (my $i=$li; $i<=$lh; $i++) {
1266: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1267: }
1268: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1269: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1270: &addlog("Rule $label failed.");
1271: my $hintlabel=$label;
1272: $hintlabel=~s/^R//;
1273: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1274: &addlog("Set hint condition $hintlabel");
1275: return 0;
1276: }
1277: } else {
1278: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 1279: my $val;
1280: if ($derivative==2) {
1.27 www 1281: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 1282: } elsif ($derivative==1) {
1.27 www 1283: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 1284: } elsif ($derivative==-1) {
1285: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1286: $val=$integral;
1.25 www 1287: } else {
1.27 www 1288: $val=$Apache::functionplotresponse::func[$i];
1.25 www 1289: }
1.31 www 1290: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 1291: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 1292: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 1293: if (($findupper) && ($i>$li)) {
1.49 www 1294: # Check lengths
1295: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1296: # Successfully found a new label, set it
1.31 www 1297: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1298: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1299: return 1;
1300: } else {
1.35 www 1301: &addlog("Rule $label failed.");
1.49 www 1302: &setfailed($label);
1.31 www 1303: return 0;
1304: }
1305: }
1.42 www 1306: }
1.25 www 1307: }
1.49 www 1308: # Corner case where this makes sense: using start or stop as defined labels
1309: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1.35 www 1310: &addlog("Rule $label passed.");
1.27 www 1311: return 1;
1.24 www 1312: }
1313:
1.49 www 1314: #
1315: # check for minimum and maximum lengths
1316: #
1317:
1318: sub checklength {
1319: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1320: unless (($minimumlength) || ($maximumlength)) { return 1; }
1321: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1322: if ($minimumlength) {
1323: if ($length<$minimumlength) {
1324: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1325: &setfailed($label);
1326: return 0;
1327: }
1328: }
1329: if ($maximumlength) {
1330: if ($length>$maximumlength) {
1331: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1332: &setfailed($label);
1333: return 0;
1334: }
1335: }
1336: return 1;
1337: }
1338:
1339: sub setfailed {
1340: my ($label)=@_;
1341: my $hintlabel=$label;
1342: $hintlabel=~s/^R//;
1343: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1344: &addlog("Set hint condition $hintlabel");
1345: }
1346:
1.37 www 1347: sub start_functionplotruleset {
1348: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1349: if ($target eq 'edit') {
1350: return &Apache::edit::start_table($token).
1351: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1352: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1353: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1354: &Apache::edit::insertlist($target,$token).' '
1355: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1.37 www 1356: .'</span></td>'
1357: ."<td> "
1358: .&Apache::edit::end_row()
1359: .&Apache::edit::start_spanning_row()
1360: ."\n";
1361: }
1362: }
1.3 www 1363:
1.37 www 1364: sub end_functionplotruleset {
1365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1366: my $id=$Apache::inputtags::response[-1];
1367: my $partid=$Apache::inputtags::part;
1368: my $internalid = $partid.'_'.$id;
1369:
1370: if ($target eq 'edit' ) {
1371: return &Apache::edit::end_table();
1372: } elsif ($target eq 'grade'
1.10 www 1373: && &Apache::response::submitted()
1374: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1375: #
1376: # Actually grade
1377: #
1.41 www 1378: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1379:
1.24 www 1380: my $ad='';
1.30 www 1381: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1382: $Apache::functionplotresponse::ruleslog='';
1.30 www 1383: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1384: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.64 www 1385: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') {
1.21 www 1386: $ad='NOT_FUNCTION';
1.18 www 1387: } else {
1.35 www 1388: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1389: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1390: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1391: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1392:
1.24 www 1393: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1394: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.65 www 1395: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1.24 www 1396: $ad='INCORRECT';
1397: last;
1398: }
1399: }
1400: # If it's not wrong, it's correct
1401: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1402: }
1.37 www 1403: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1404: &addlog("Assigned award detail: $ad");
1405: # Store for later to be assigned at end_functionplotresponse
1406: $Apache::functionplotresponse::awarddetail=$ad;
1407: }
1408: }
1409:
1410:
1411: sub end_functionplotresponse {
1412: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1413: &Apache::response::end_response;
1414:
1415: my $result;
1416: my $id=$Apache::inputtags::response[-1];
1417: my $partid=$Apache::inputtags::part;
1418: my $internalid = $partid.'_'.$id;
1.20 www 1419:
1.37 www 1420: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1421: if ($target eq 'grade'
1422: && &Apache::response::submitted()
1423: && $Apache::lonhomework::type eq 'exam') {
1424:
1425: &Apache::response::scored_response($partid,$id);
1426:
1427: } elsif ($target eq 'grade'
1428: && &Apache::response::submitted()
1429: && $Apache::lonhomework::type ne 'exam') {
1430: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1431: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1432: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1433: #
1434: # Assign grade
1435: #
1436: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1437: #
1438: # Store grading info
1439: #
1440: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1441: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1442: } elsif ($target eq 'web') {
1.37 www 1443: undef @Apache::functionplotresponse::failedrules;
1444: }
1445: return $result;
1446: }
1447:
1448: sub end_functionplotelements {
1449: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1450: my $result='';
1451: my $id=$Apache::inputtags::response[-1];
1452: my $partid=$Apache::inputtags::part;
1453: my $internalid = $partid.'_'.$id;
1454: if ($target eq 'edit' ) {
1455: $result=&Apache::edit::end_table();
1456: } elsif ($target eq 'web') {
1.47 www 1457: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1458:
1459: # Are we in show answer mode?
1460: my $showanswer=&Apache::response::show_answer();
1461: if ($showanswer) {
1462: # Render answerdisplay
1463: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1464: if ($answerdisplay=~/\S/s) {
1465: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1.58 www 1466: my @components=split(/\s*\:\s*/,$plot);
1467: if ($#components<3) {
1468: # Just a simple plot
1469: my ($func,$xl,$xh)=@components;
1470: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1471: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1472: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1473: } else {
1474: # This is a spline
1.59 www 1475: $result.=&answer_spline_script($internalid,@components);
1.58 www 1476: }
1.47 www 1477: }
1478: }
1479: }
1.48 www 1480: my $fixed=0;
1481: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1.6 www 1482: # Now is the time to render all of the stored splines
1483: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.48 www 1484: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1.6 www 1485: }
1.5 www 1486: # close the init script
1.3 www 1487: $result.=&end_init_script();
1.17 www 1488: # register all splines in this response
1489: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1490: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1491: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1492: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1493: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1494: }
1.9 www 1495: # generate the input fields
1496: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1497: # actually start the <applet>-tag
1.3 www 1498: $result.=&geogebra_startcode($internalid);
1.5 www 1499: # load the spline bytecode
1.3 www 1500: $result.=&geogebra_spline_program();
1.5 www 1501: # set default parameters
1.3 www 1502: $result.=&geogebra_default_parameters($internalid);
1.5 www 1503: # close the <applet>-tag
1.1 www 1504: $result.=&geogebra_endcode();
1505: }
1506: return $result;
1507: }
1508:
1.41 www 1509: sub boundaries {
1510: my ($parstack,$safeeval,$level)=@_;
1511: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
1512: $xmin=(defined($xmin)?$xmin:-10);
1513: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
1514: $xmax=(defined($xmax)?$xmax:10);
1515: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
1516: $ymin=(defined($ymin)?$ymin:-10);
1517: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
1518: $ymax=(defined($ymax)?$ymax:10);
1519: if ($xmax<=$xmin) {
1520: $xmax=$xmin+20;
1521: }
1522: if ($ymax<=$ymin) {
1523: $ymax=$ymin+20;
1524: }
1525: return ($xmin,$xmax,$ymin,$ymax);
1526: }
1527:
1.37 www 1528: sub start_functionplotelements {
1529: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1530: my $result='';
1531: my $id=$Apache::inputtags::response[-1];
1532: my $partid=$Apache::inputtags::part;
1533: my $internalid = $partid.'_'.$id;
1534:
1535: if ($target eq 'edit') {
1536: return &Apache::edit::start_table($token).
1537: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
1538: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1539: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1540: &Apache::edit::insertlist($target,$token).' '
1541: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
1.37 www 1542: .'</span></td>'
1543: ."<td> "
1544: .&Apache::edit::end_row()
1545: .&Apache::edit::start_spanning_row()
1546: ."\n";
1547: } elsif ($target eq 'web') {
1.41 www 1548: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 1549: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1550: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1551: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
1552: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
1553: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
1554:
1555:
1556: # paste in the update routine to receive stuff back from the applet
1557: $result.=&update_script($internalid);
1558: # start the initscript for this applet
1559: $result.=&start_init_script($internalid);
1560: # put the axis commands inside
1561: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.45 www 1562: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
1.37 www 1563: # init script is left open
1564: }
1565: return $result;
1566: }
1567:
1.1 www 1568: 1;
1569:
1570: __END__
1571:
1572: =head1 NAME
1573:
1574: Apache::functionplotresponse.pm;
1575:
1576: =head1 SYNOPSIS
1577:
1578: Handles tags associated with accepting function plots.
1579:
1580: This is part of the LearningOnline Network with CAPA project
1581: described at http://www.lon-capa.org.
1582:
1583: =head1 HANDLER SUBROUTINE
1584:
1585: start_functionplotresponse()
1586:
1587: =head1 OTHER SUBROUTINES
1588:
1589: =over
1590:
1591: =item end_functionplotresponse()
1592:
1593: =back
1594:
1595: =cut
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