Annotation of loncom/homework/functionplotresponse.pm, revision 1.90
1.1 www 1: # LearningOnline Network with CAPA
1.70 www 2: # Functionplot responses
1.1 www 3: #
1.90 ! www 4: # $Id: functionplotresponse.pm,v 1.89 2011/12/09 22:04:51 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;
1.85 www 35: use LONCAPA;
1.36 www 36:
1.1 www 37: BEGIN {
1.37 www 38: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
1.85 www 39: 'plotobject','plotvector',
40: 'functionplotvectorrule','functionplotvectorsumrule',
41: 'functionplotcustomrule',
1.37 www 42: 'functionplotrule','functionplotruleset',
43: 'functionplotelements'));
1.1 www 44: }
45:
1.5 www 46: #
47: # There can be a number of applets on a page, each called ggbApplet_$id,
48: # where $id is the "_"-concatenated part and responseid
49: #
50:
1.1 www 51: sub geogebra_startcode {
1.88 www 52: my ($id,$width,$height)=@_;
53: $width=int(1.*$width);
54: $height=int(1.*$height);
55: unless ($width) { $width=700; }
56: unless ($height) { $height=400; }
1.1 www 57: return (<<ENDSTARTCODE);
1.3 www 58: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
1.88 www 59: codebase="/adm/geogebra/" width="$width" height="$height" MAYSCRIPT>
1.1 www 60: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
61: ENDSTARTCODE
62: }
63:
64: sub geogebra_endcode {
1.2 www 65: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
66: }
67:
1.5 www 68: #
69: # This is the internal GeoGebra bytecode which defines the spline functions
70: #
1.2 www 71: sub geogebra_spline_program {
72: return (<<ENDSPLINEPROGRAM);
1.57 www 73: <param name="ggbBase64" value="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"/>
1.2 www 74: ENDSPLINEPROGRAM
75: }
76:
1.5 www 77: #
78: # The standard set of parameters inside <applet>
79: #
1.2 www 80: sub geogebra_default_parameters {
1.3 www 81: my ($id)=@_;
1.2 www 82: return(<<ENDDEFAULTPARAMETERS);
83: <param name="image" value="/adm/lonIcons/lonanim.gif" />
84: <param name="boxborder" value="false" />
85: <param name="centerimage" value="true" />
1.62 www 86: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_algos.jar, geogebra_javascript.jar, geogebra_properties.jar, jlatexmath.jar, jlm_cyrillic.jar, jlm_greek.jar" />
1.69 www 87: <param name="cache_version" value="4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0" />
1.2 www 88: <param name="framePossible" value="false" />
89:
90: <param name="showResetIcon" value="false" />
91: <param name="showAnimationButton" value="false" />
92: <param name="enableRightClick" value="false" />
93: <param name="errorDialogsActive" value="true" />
94: <param name="enableLabelDrags" value="false" />
95: <param name="showMenuBar" value="false" />
96: <param name="showToolBar" value="false" />
97: <param name="showToolBarHelp" value="false" />
98: <param name="showAlgebraInput" value="false" />
99: <param name="enableShiftDragZoom" value="false" />
100: <param name="allowRescaling" value="false" />
101: <param name="enableLabelDrags" value="false" />
1.3 www 102: <param name="ggbOnInitParam" value="applet_$id" />
1.2 www 103: ENDDEFAULTPARAMETERS
1.1 www 104: }
105:
1.5 www 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:
1.3 www 113: sub init_script {
1.16 www 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)).
1.52 www 120: ") { setTimeout('ggbInitAll()',200) }";
1.16 www 121: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
1.3 www 122: return (<<ENDGGBINIT);
123: <script type="text/javascript">
124: // <![CDATA[
1.16 www 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
1.3 www 128: function ggbOnInit(param) {
1.16 www 129: $script
130: }
131: function ggbInitAll() {
1.17 www 132: $calls
1.3 www 133: }
134: // ]]>
135: </script>
136: ENDGGBINIT
137: }
138: }
139:
1.5 www 140: #
141: # Each Geogebra applet is supposed to call this when parameters change
1.10 www 142: # Changes the hidden fields on the web page
1.5 www 143: #
144: sub update_script {
145: my ($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_$id.getYcoord(coordinateName);
1.9 www 152: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
153: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
1.5 www 154: }
155: // ]]>
156: </script>
157: ENDUPDATESCRIPT
158: }
159:
160: #
161: # Register the above update-handler for a variable
162: #
163:
164: sub update_register {
165: my ($id,$variable)=@_;
1.6 www 166: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
167: }
168:
169: #
1.40 www 170: # Set a point coordinate variable
1.6 www 171: #
1.40 www 172: sub set_point_coordinate {
1.48 www 173: my ($id,$variable,$x,$y,$fixed)=@_;
174: my $mult=($fixed?'a*':'');
1.68 www 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: $y=~s/\+//;
1.6 www 183: return (<<ENDSETVARIABLE);
1.48 www 184: document.ggbApplet_$id.evalCommand("a=1");
185: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
1.40 www 186: document.ggbApplet_$id.setLabelVisible("$variable",false);
1.6 www 187: ENDSETVARIABLE
188: }
189:
190: #
1.40 www 191: # Set a slope coordinate variable
192: #
193: sub set_slope_coordinate {
1.48 www 194: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
1.40 www 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.;
1.48 www 201: my $mult=($fixed?'a*':'');
1.40 www 202: return (<<ENDSETSVARIABLE);
1.48 www 203: document.ggbApplet_$id.evalCommand("a=1");
1.51 www 204: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
1.40 www 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=$yrel");
1.48 www 210: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
1.40 www 211: document.ggbApplet_$id.setLabelVisible("$variable", false);
212: ENDSETSVARIABLE
213: }
214:
215: #
1.9 www 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='$y' />\n";
233: }
234:
235: #
1.40 www 236: # Initialize a new point coordinate variable at set a listener on it
1.6 www 237: #
1.40 www 238: sub new_point_coordinate {
1.48 www 239: my ($id,$variable,$x,$y,$fixed)=@_;
1.11 www 240: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
1.10 www 241: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
242: }
1.11 www 243: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
1.10 www 244: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
245: }
1.9 www 246: &generate_input_field($id,$variable,$x,$y);
1.48 www 247: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
1.40 www 248: }
249:
250: #
251: # Initialize a new slope coordinate variable at set a listener on it
252: #
253: sub new_slope_coordinate {
1.48 www 254: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.40 www 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-$yp;
1.48 www 277: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
1.5 www 278: }
279:
280: #
281: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
282: # It then starts the right headers
283: #
1.3 www 284: sub start_init_script {
285: my ($id)=@_;
1.16 www 286: # Add id to the list of ggbInit_$id functions that need to be called
287: push(@Apache::functionplotresponse::callscripts,$id);
1.5 www 288: # ... and open this function
1.3 www 289: return (<<ENDSTARTINIT);
290: <script type="text/javascript">
291: // <![CDATA[
1.5 www 292: // variable that will eventually be passed back to the server
293: var coordinateMap_$id = [];
1.16 www 294: // flag for not loaded yet
295: var loaded_$id=false;
1.5 www 296: // Init-function for applet
1.3 www 297: function ggbInit_$id() {
298: ENDSTARTINIT
299: }
300:
1.5 www 301: #
302: # This sets the axes inside ggbInit_$id
303: #
304:
1.4 www 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:
1.14 www 318: sub axes_label {
1.45 www 319: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
1.14 www 320: unless ($xlabel || $ylabel) { return ''; }
321: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
322: if ($xlabel) {
1.45 www 323: if (($ymin<0) && ($ymax>0)) {
1.14 www 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
1.45 www 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: }
1.14 www 335: }
336: if ($ylabel) {
1.45 www 337: if (($xmin<0) && ($xmax>0)) {
1.14 www 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
1.45 www 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: }
1.14 www 349: }
350: return $return;
351: }
352:
1.58 www 353: #
354: # Subroutine to produce background and answer plots
355: #
356:
1.4 www 357: sub plot_script {
1.47 www 358: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
1.41 www 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: }
1.46 www 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: }
1.6 www 379: if ($fixed) {
1.43 www 380: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
1.46 www 381: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
1.47 www 382: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
383: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
1.6 www 384: } else {
1.46 www 385: return "document.ggbApplet_$id.evalCommand('y=$function');\n";
1.6 www 386: }
1.4 www 387: }
388:
1.5 www 389: #
1.70 www 390: # Subroutine to produce objects
391: #
392:
393: sub plotobject_script {
394: my ($id,$label,$x,$y)=@_;
395: unless ($label) {
396: $Apache::functionplotresponse::counter++;
397: $label='O'.$Apache::functionplotresponse::counter;
398: }
1.77 www 399: &generate_input_field($id,$label,$x,$y);
1.70 www 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('$label', true);\n";
406: }
407:
408: #
409: # Subroutine to produce vectors
410: #
411:
412: sub plotvector_script {
1.72 www 413: my ($id,$label,$xs,$ys,$xe,$ye,$xmin,$xmax)=@_;
1.70 www 414: unless ($label) {
415: $Apache::functionplotresponse::counter++;
416: $label='V'.$Apache::functionplotresponse::counter;
417: }
1.71 www 418: my $startlabel=$label.'Start';
419: my $endlabel=$label.'End';
420: my $pointlabel=$label.'Point';
1.72 www 421: my $pointx=2.*($xmax-$xmin)+$xmax;
1.71 www 422: my $anglelabel=$label.'Angle';
1.74 www 423: return
424: &new_point_coordinate($id,$startlabel,$xs,$ys,0).
425: &new_point_coordinate($id,$endlabel,$xe,$ye,0).
426: (<<ENDVECTOR);
1.71 www 427: document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]");
428: document.ggbApplet_$id.setLabelVisible("$label",true);
429: document.ggbApplet_$id.setLineThickness("$label",8);
1.72 www 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("$anglelabel",VALUE=2);
1.70 www 434: ENDVECTOR
435: }
436:
437: #
1.58 www 438: # Answer spline display
439: #
440: # points: x,y,slope_x,slope_y
441:
442: sub answer_spline_script {
443: my ($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++;
1.60 www 448: my $label='CSpline'.$Apache::functionplotresponse::counter;
1.59 www 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) {
1.61 www 456: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n";
1.59 www 457: }
1.60 www 458: for (my $i=1; $i<2*$order; $i+=2) {
1.61 www 459: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n";
1.60 www 460: }
461:
1.59 www 462: return $output;
1.58 www 463: }
464:
465: #
1.7 www 466: # Subroutine that generates code for spline $label based on stored information
1.6 www 467: #
468:
469: sub generate_spline {
1.48 www 470: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
1.6 www 471: my $result='';
1.7 www 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) {
1.48 www 479: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
1.40 www 480: my $xp=$x;
1.8 www 481: $x+=$sx/(2.*($order-1));
1.7 www 482: push(@coords,$label.'P'.$i);
1.48 www 483: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
1.8 www 484: $x+=$sx/(2.*($order-1));
1.7 www 485: push(@coords,$label.'S'.$i);
486: }
487: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
1.6 www 488: return $result;
489: }
1.70 www 490:
491: #
492: # Object
493: #
494:
495: sub start_plotobject {
496: my ($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') {
1.76 www 520: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
1.70 www 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 $result;
534: }
535:
1.71 www 536: #
537: # Vector
538: #
539:
540: sub start_plotvector {
541: my ($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; }
1.72 www 559: $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy,$xmin,$xmax);
1.71 www 560: } elsif ($target eq 'edit') {
561: $result=&Apache::edit::tag_start($target,$token,'Plot Vector').
562: &Apache::edit::text_arg('Label on Plot:','label',
563: $token,'16').
564: &Apache::edit::text_arg('Tail x:','tailx',
565: $token,'8').
566: &Apache::edit::text_arg('Tail y:','taily',
567: $token,'8').
568: &Apache::edit::text_arg('Tip x:','tipx',
569: $token,'8').
570: &Apache::edit::text_arg('Tip y:','tipy',
571: $token,'8').
572:
573: &Apache::edit::end_row();
574: } elsif ($target eq 'modified') {
1.76 www 575: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
1.71 www 576: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','tipx','tipy');
577: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
578: }
579: return $result;
580: }
581:
582: sub end_plotvector {
583: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
584: my $result='';
585: if ($target eq 'edit') {
586: $result=&Apache::edit::end_table();
587: }
588: return $result;
589: }
590:
591:
1.70 www 592:
1.6 www 593: #
594: # <backgroundplot function="..." fixed="yes/no" />
1.5 www 595: #
1.4 www 596: sub start_backgroundplot {
597: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
598: my $result='';
599: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
600: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
1.47 www 601: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
602: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
1.41 www 603: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
1.46 www 604: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
605: $color=~s/[^a-fA-F0-9]//gs;
606: unless (length($color)==6) { $color=''; }
1.6 www 607: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
608:
1.4 www 609: unless ($function) { $function="0"; }
610: if ($target eq 'web') {
1.41 www 611: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
1.47 www 612: unless (defined($xinitial)) { $xinitial=$xmin; }
613: unless (defined($xfinal)) { $xfinal=$xmax; }
614: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
1.13 www 615: } elsif ($target eq 'edit') {
616: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
617: &Apache::edit::text_arg('Function:','function',
618: $token,'16').
1.47 www 619: &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
620: $token,'8').
621: &Apache::edit::text_arg('Final x-value (optional):','xfinal',
622: $token,'8').
1.41 www 623: &Apache::edit::text_arg('Label on Plot:','label',
624: $token,'8').
1.46 www 625: &Apache::edit::text_arg('Color (hex code):','color',
626: $token,'8').
1.13 www 627: &Apache::edit::select_arg('Fixed location:','fixed',
628: ['yes','no'],$token).
629: &Apache::edit::end_row();
630: } elsif ($target eq 'modified') {
631: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.47 www 632: $safeeval,'function','label','xinitial','xfinal','color','fixed');
1.13 www 633: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
634: }
635: return $result;
1.4 www 636: }
637:
638: sub end_backgroundplot {
1.13 www 639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
640: my $result='';
641: if ($target eq 'edit') {
642: $result=&Apache::edit::end_table();
643: }
644: return $result;
1.6 www 645: }
646:
647: #
1.25 www 648: # <functionplotrule ... />
1.12 www 649: #
1.25 www 650: sub start_functionplotrule {
1.12 www 651: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
652: my $result='';
1.24 www 653: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
654: $Apache::functionplotresponse::counter++;
655: if ($label=~/\W/) {
1.25 www 656: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
1.24 www 657: }
658: $label=~s/\W//gs;
659: unless ($label) {
660: $label='R'.$Apache::functionplotresponse::counter;
661: } else {
662: $label='R'.$label;
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') {
1.75 www 700: $result=&Apache::edit::tag_start($target,$token,'Function Plot Graph 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 $result;
1.12 www 758: }
759:
760:
761: #
1.75 www 762: # <functionplotvectorrule ... />
763: #
764: sub start_functionplotvectorrule {
765: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
766: my $result='';
767: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
768: $Apache::functionplotresponse::counter++;
769: if ($label=~/\W/) {
770: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
771: }
772: $label=~s/\W//gs;
773: unless ($label) {
1.79 www 774: $label='R'.$Apache::functionplotresponse::counter;
1.75 www 775: } else {
1.79 www 776: $label='R'.$label;
1.75 www 777: }
778:
779: if ($target eq 'grade') {
780: # Simply remember - in order - for later
1.77 www 781:
782: my $id=$Apache::inputtags::response[-1];
783: my $partid=$Apache::inputtags::part;
784: my $internalid = $partid.'_'.$id;
785:
1.75 www 786: my $vector=&Apache::lonxml::get_param('vector',$parstack,$safeeval);
787: $vector=~s/\W//gs;
788: $vector=ucfirst($vector);
1.76 www 789:
1.75 www 790: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
791: $label,
1.76 www 792: 'vector',
1.77 www 793: $internalid,
1.75 www 794: $vector,
1.87 www 795: &Apache::lonxml::get_param('attachpoint',$parstack,$safeeval),
796: &Apache::lonxml::get_param('notattachpoint',$parstack,$safeeval),
797: &Apache::lonxml::get_param('tailpoint',$parstack,$safeeval),
798: &Apache::lonxml::get_param('tippoint',$parstack,$safeeval),
799: &Apache::lonxml::get_param('nottailpoint',$parstack,$safeeval),
800: &Apache::lonxml::get_param('nottippoint',$parstack,$safeeval),
1.75 www 801: &Apache::lonxml::get_param('length',$parstack,$safeeval),
802: &Apache::lonxml::get_param('angle',$parstack,$safeeval),
1.79 www 803: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval),
804: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval),
1.75 www 805: )));
806: } elsif ($target eq 'edit') {
807: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Rule').
808: &Apache::edit::text_arg('Index/Name:','index',
809: $token,'10').' '.
810: &Apache::edit::text_arg('Vector:','vector',
811: $token,'16').'<br />'.
1.76 www 812: &Apache::edit::text_arg('Attached to object:','attachpoint',
813: $token,'16').
814: &Apache::edit::text_arg('Not attached to object:','notattachpoint',
815: $token,'16').'<br />'.
1.75 www 816: &Apache::edit::text_arg('Tail attached to object:','tailpoint',
817: $token,'16').
818: &Apache::edit::text_arg('Tip attached to object:','tippoint',
819: $token,'16').
820: &Apache::edit::text_arg('Tail not attached to object:','nottailpoint',
821: $token,'16').
822: &Apache::edit::text_arg('Tip not attached to object:','nottippoint',
823: $token,'16').'<br />'.
824: &Apache::edit::text_arg('Length:','length',
1.84 www 825: $token,'30').
826: &Apache::edit::text_arg('Absolute error length:','lengtherror',
827: $token,'8').'<br />'.
1.75 www 828: &Apache::edit::text_arg('Angle:','angle',
1.84 www 829: $token,'30').
1.79 www 830: &Apache::edit::text_arg('Absolute error angle:','angleerror',
1.75 www 831: $token,'8').
832: &Apache::edit::end_row();
833: } elsif ($target eq 'modified') {
1.76 www 834: $env{'form.'.&Apache::edit::html_element_name('vector')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('vector')});
1.75 www 835: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.76 www 836: $safeeval,'index','vector','attachpoint','notattachpoint',
1.75 www 837: 'tailpoint','tippoint','nottailpoint','nottipoint',
838: 'length','angle',
1.79 www 839: 'lengtherror','angleerror');
1.75 www 840: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
841: }
842: return $result;
843: }
844:
845: sub end_functionplotvectorrule {
846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
847: my $result='';
848: if ($target eq 'edit') {
849: $result=&Apache::edit::end_table();
850: }
851: return $result;
852: }
853:
1.76 www 854: #
855: # <functionplotvectorsumrule ... />
856: #
857: sub start_functionplotvectorsumrule {
858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
859: my $result='';
860: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
861: $Apache::functionplotresponse::counter++;
862: if ($label=~/\W/) {
863: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
864: }
865: $label=~s/\W//gs;
866: unless ($label) {
1.79 www 867: $label='R'.$Apache::functionplotresponse::counter;
1.76 www 868: } else {
1.79 www 869: $label='R'.$label;
1.76 www 870: }
871: if ($target eq 'grade') {
872: # Simply remember - in order - for later
1.77 www 873: my $id=$Apache::inputtags::response[-1];
874: my $partid=$Apache::inputtags::part;
875: my $internalid = $partid.'_'.$id;
1.82 www 876: my $vectors=&Apache::lonxml::get_param('vectors',$parstack,$safeeval);
1.76 www 877: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
878: $label,
879: 'sum',
1.77 www 880: $internalid,
1.82 www 881: $vectors,
1.76 www 882: &Apache::lonxml::get_param('length',$parstack,$safeeval),
883: &Apache::lonxml::get_param('angle',$parstack,$safeeval),
1.80 www 884: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval),
1.79 www 885: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval),
1.76 www 886: )));
887: } elsif ($target eq 'edit') {
888: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Sum Rule').
889: &Apache::edit::text_arg('Index/Name:','index',
890: $token,'10').' '.
1.82 www 891: &Apache::edit::text_arg('Comma-separated list of vectors:','vectors',
892: $token,'30').'<br />'.
1.76 www 893: &Apache::edit::text_arg('Sum vector length:','length',
1.84 www 894: $token,'30').
895: &Apache::edit::text_arg('Absolute error length:','lengtherror',
896: $token,'8').'<br />'.
1.76 www 897: &Apache::edit::text_arg('Sum vector angle:','angle',
1.84 www 898: $token,'30').
899: &Apache::edit::text_arg('Absolute error angle:','angleerror',
1.76 www 900: $token,'8').
901: &Apache::edit::end_row();
1.85 www 902: } elsif ($target eq 'modified') {
903: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
904: $safeeval,'index','vectors',
905: 'length','angle',
906: 'lengtherror','angleerror');
907: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1.76 www 908: }
909: return $result;
910: }
1.75 www 911:
1.76 www 912: sub end_functionplotvectorsumrule {
913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
914: my $result='';
915: if ($target eq 'edit') {
916: $result=&Apache::edit::end_table();
917: }
918: return $result;
919: }
1.75 www 920:
921: #
1.85 www 922: # <functionplotcustom ... />
923: #
924: sub start_functionplotcustomrule {
925: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
926: my $result='';
927: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
928: $Apache::functionplotresponse::counter++;
929: if ($label=~/\W/) {
930: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
931: }
932: $label=~s/\W//gs;
933: unless ($label) {
934: $label='R'.$Apache::functionplotresponse::counter;
935: } else {
936: $label='R'.$label;
937: }
938: &Apache::lonxml::register('Apache::response',('answer'));
939: if ($target eq 'edit') {
940: $result=&Apache::edit::tag_start($target,$token,'Function Plot Custom Rule').
941: &Apache::edit::text_arg('Index/Name:','index',$token,'10').
942: &Apache::edit::end_row();
943: } elsif ($target eq 'modified') {
944: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'index');
945: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
946: }
947: return $result;
948: }
949:
950: sub end_functionplotcustomrule {
951: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
952: my $result='';
953: if ($target eq 'edit') {
954: $result=&Apache::edit::end_table();
955: } elsif ($target eq 'grade') {
956: # Simply remember - in order - for later
957: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
958: $Apache::functionplotresponse::counter++;
959: if ($label=~/\W/) {
960: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
961: }
962: $label=~s/\W//gs;
963: unless ($label) {
964: $label='R'.$Apache::functionplotresponse::counter;
965: } else {
966: $label='R'.$label;
967: }
968: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
969: $label,
970: 'custom',
971: &escape($Apache::response::custom_answer[-1])
972: )));
973: }
974: &Apache::lonxml::deregister('Apache::response',('answer'));
975: return $result;
976: }
977:
978:
979:
980: #
1.23 www 981: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
1.6 www 982: #
983: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
984: #
985: sub start_spline {
986: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.13 www 987: my $result='';
988: if ($target eq 'web') {
1.23 www 989: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
1.13 www 990: $Apache::functionplotresponse::counter++;
991: if ($label=~/\W/) {
1.23 www 992: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
1.13 www 993: }
994: $label=~s/\W//gs;
1.23 www 995: unless ($label) {
996: $label='S'.$Apache::functionplotresponse::counter;
997: } else {
998: $label='S'.$label;
999: }
1.13 www 1000: if ($Apache::functionplotresponse::splineorder{$label}) {
1.23 www 1001: &Apache::lonxml::error(&mt('Spline indices must be unique.'));
1.13 www 1002: }
1003:
1004: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
1005: if ($order<2) { $order=2; }
1006: if ($order>8) { $order=8; }
1007: $Apache::functionplotresponse::splineorder{$label}=$order;
1008:
1009: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
1010: unless ($x) { $x=0; }
1011: $Apache::functionplotresponse::splineinitx{$label}=$x;
1012:
1013: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
1014: unless ($y) { $y=0; }
1015: $Apache::functionplotresponse::splineinity{$label}=$y;
1016:
1017: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
1018: unless ($sx) { $sx=$order; }
1019: $Apache::functionplotresponse::splinescalex{$label}=$sx;
1020:
1021: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
1022: unless ($sy) { $sy=2; }
1023: $Apache::functionplotresponse::splinescaley{$label}=$sy;
1024: } elsif ($target eq 'edit') {
1025: $result=&Apache::edit::tag_start($target,$token,'Spline').
1.23 www 1026: &Apache::edit::text_arg('Index:','index',
1.14 www 1027: $token,'4').' '.
1.13 www 1028: &Apache::edit::select_arg('Order:','order',
1.44 www 1029: ['2','3','4','5','6','7','8'],$token).' '.
1.13 www 1030: &Apache::edit::text_arg('Initial x-value:','initx',
1.14 www 1031: $token,'4').' '.
1.13 www 1032: &Apache::edit::text_arg('Initial y-value:','inity',
1.14 www 1033: $token,'4').' '.
1.13 www 1034: &Apache::edit::text_arg('Scale x:','scalex',
1.14 www 1035: $token,'4').' '.
1.13 www 1036: &Apache::edit::text_arg('Scale y:','scaley',
1037: $token,'4').
1038: &Apache::edit::end_row();
1039: } elsif ($target eq 'modified') {
1040: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.23 www 1041: $safeeval,'index','order','initx','inity',
1.13 www 1042: 'scalex','scaley');
1043: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
1044: }
1045: return $result;
1.6 www 1046: }
1047:
1048: sub end_spline {
1.13 www 1049: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1050: my $result='';
1051: if ($target eq 'edit') {
1052: $result=&Apache::edit::end_table();
1053: }
1054: return $result;
1.4 www 1055: }
1056:
1.3 www 1057: sub end_init_script {
1058: return (<<ENDENDINIT);
1059: }
1060: // ]]>
1061: </script>
1062: ENDENDINIT
1063: }
1064:
1.10 www 1065: #
1066: # Storing and restoring spline coordinates from part answers
1067: #
1068: sub decode_previous_answer {
1069: my ($answer)=@_;
1070: foreach my $coordinate (split(/\,/,$answer)) {
1071: my ($key,$value)=split(/\=/,$coordinate);
1072: $Apache::functionplotresponse::previous{$key}=$value;
1073: }
1074: }
1075:
1076: sub get_answer_from_form_fields {
1077: my ($id)=@_;
1078: my $answer='';
1079: my %coords=();
1080: foreach my $field (keys(%env)) {
1081: if ($field=~/^form\.HWVAL\_$id/) {
1082: $field=~/^form\.(.*)$/;
1083: $coords{$1}=$env{$field};
1084: }
1085: }
1086: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
1087: return ($answer,%coords);
1088: }
1089:
1.15 www 1090: #
1091: # The following functions calculate the cubic-hermite splines server-side
1092: #
1093:
1094: sub cubic_hermite {
1095: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 1096: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
1097: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
1.15 www 1098: }
1099:
1100: #
1101: # d/dt(...)
1102: #
1103:
1104: sub ddt_cubic_hermite {
1105: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 1106: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
1107: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
1.15 www 1108: }
1109:
1110: #
1111: # d^2/dt^2(...)
1112: #
1113:
1114: sub d2dt2_cubic_hermite {
1115: my ($t,$p1,$s1,$p2,$s2)=@_;
1.42 www 1116: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
1117: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
1.15 www 1118: }
1119:
1120: #
1.18 www 1121: # Array index calculation
1122: #
1123: sub array_index {
1124: my ($xmin,$xmax,$x)=@_;
1.38 www 1125: if ($x ne '') {
1126: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
1127: } else {
1128: return undef;
1129: }
1.20 www 1130: }
1131:
1132: #
1.18 www 1133: # Populate the arrays
1134: #
1135:
1136: sub populate_arrays {
1.64 www 1137: my ($id,$xmin,$xmax,$ymin,$ymax)=@_;
1.26 www 1138: for (my $i=0; $i<=400; $i++) {
1.35 www 1139: $Apache::functionplotresponse::actualxval[$i]=undef;
1.19 www 1140: $Apache::functionplotresponse::func[$i]=undef;
1.22 www 1141: $Apache::functionplotresponse::dfuncdx[$i]=undef;
1.19 www 1142: $Apache::functionplotresponse::d2funcd2x[$i]=undef;
1.18 www 1143: }
1.19 www 1144: unless ($xmax>$xmin) { return 'no_func'; }
1.18 www 1145: # Run over all splines in response
1146: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
1.19 www 1147: my $xiold=-1;
1.18 www 1148: # Run over all points in spline
1.19 www 1149: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
1.18 www 1150: my $ni=$i+1;
1151: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
1152: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
1153: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
1154: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
1155: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
1156: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
1157: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
1158: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
1159: # Run in small steps over spline parameter
1.26 www 1160: for (my $t=0; $t<=1; $t+=0.0001) {
1.35 www 1161: my $xreal=&cubic_hermite($t,@xparms);
1162: my $xi=&array_index($xmin,$xmax,$xreal);
1.19 www 1163: if ($xi<$xiold) { return 'no_func'; }
1.26 www 1164: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
1.18 www 1165: $xiold=$xi;
1.35 www 1166: $Apache::functionplotresponse::actualxval[$xi]=$xreal;
1.22 www 1167: # Function value
1.30 www 1168: my $funcval=&cubic_hermite($t,@yparms);
1.64 www 1169:
1170: # Do we already have a value for this point, and is it different from the new one?
1171: if ((defined($Apache::functionplotresponse::func[$xi])) &&
1172: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) {
1173: return 'no_func';
1174: }
1175: # Okay, remember the new point
1.30 www 1176: $Apache::functionplotresponse::func[$xi]=$funcval;
1.64 www 1177:
1.30 www 1178: if (defined($funcval)) {
1179: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
1180: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
1181: }
1182: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
1183: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
1184: }
1185: }
1.28 www 1186: # Chain rule
1.22 www 1187: # dy/dx=dy/dt/(dx/dt)
1188: my $dxdt=&ddt_cubic_hermite($t,@xparms);
1189: if ($dxdt) {
1190: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
1.34 www 1191: # Second derivative
1.28 www 1192: $Apache::functionplotresponse::d2funcdx2[$xi]=
1.34 www 1193: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
1194: ($dxdt*$dxdt*$dxdt);
1.22 www 1195: }
1.18 www 1196: }
1197: }
1198: }
1199: }
1200: }
1201:
1202: #
1.37 www 1203: # Implementation of <functionplotresponse>
1.15 www 1204: #
1205:
1.1 www 1206: sub start_functionplotresponse {
1207: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1208: my $result='';
1.6 www 1209: # To remember the splines - somehow, they need to come last
1210: undef %Apache::functionplotresponse::splineorder;
1211: undef %Apache::functionplotresponse::splineinitx;
1212: undef %Apache::functionplotresponse::splineinity;
1213: undef %Apache::functionplotresponse::splinescalex;
1214: undef %Apache::functionplotresponse::splinescaley;
1.10 www 1215: # Remember input fields, etc
1216: undef %Apache::functionplotresponse::previous;
1.9 www 1217: $Apache::functionplotresponse::inputfields='';
1.6 www 1218: $Apache::functionplotresponse::counter=0;
1.24 www 1219: # Remember rules
1.25 www 1220: undef @Apache::functionplotresponse::functionplotrules;
1.75 www 1221: undef @Apache::functionplotresponse::functionplotvectorrules;
1.37 www 1222: # Remember failed rules
1223: if ($target eq 'grade') {
1224: undef @Apache::functionplotresponse::failedrules;
1225: }
1226: # Delete previous awards
1227: undef $Apache::functionplotresponse::awarddetail;
1.10 www 1228: # Part and ID
1229: my $partid=$Apache::inputtags::part;
1230: my $id=&Apache::response::start_response($parstack,$safeeval);
1.6 www 1231: # Internal ID to mark the applet and its coordinates
1.10 www 1232: my $internalid = $partid.'_'.$id;
1233: # Previous answer
1234: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
1235:
1.6 www 1236: # Parameters of <functionplotresponse>
1.41 www 1237: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
1.6 www 1238: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1239: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1240: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
1.14 www 1241: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
1242: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
1.12 www 1243: if ($target eq 'edit') {
1244: $result.=&Apache::edit::start_table($token)
1245: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
1246: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.37 www 1247: .&Apache::edit::deletelist($target,$token).' '
1.50 www 1248: .&Apache::edit::insertlist($target,$token).' '
1249: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
1.12 www 1250: .'</span></td>'
1251: ."<td> "
1252: .&Apache::edit::end_row()
1253: .&Apache::edit::start_spanning_row()
1254: ."\n";
1.88 www 1255: $result.=&Apache::edit::text_arg('Width (pixels):','width',
1256: $token,'6').' '.
1257: &Apache::edit::text_arg('Height (pixels):','height',
1258: $token,'6').'<br />'.
1259: &Apache::edit::text_arg('Label x-axis:','xlabel',
1.14 www 1260: $token,'6').' '.
1261: &Apache::edit::text_arg('Minimum x-value:','xmin',
1262: $token,'4').' '.
1.12 www 1263: &Apache::edit::text_arg('Maximum x-value:','xmax',
1.14 www 1264: $token,'4').' '.
1.12 www 1265: &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
1.32 www 1266: ['yes','no'],$token).'<br />'.
1.14 www 1267: &Apache::edit::text_arg('Label y-axis:','ylabel',
1268: $token,'6').' '.
1.12 www 1269: &Apache::edit::text_arg('Minimum y-value:','ymin',
1.14 www 1270: $token,'4').' '.
1.12 www 1271: &Apache::edit::text_arg('Maximum y-value:','ymax',
1.14 www 1272: $token,'4').' '.
1.12 www 1273: &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
1.32 www 1274: ['yes','no'],$token).'<br />'.
1.12 www 1275: &Apache::edit::select_arg('Grid visible:','gridvisible',
1.47 www 1276: ['yes','no'],$token).'<br />'.
1.58 www 1277: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):',
1.63 raeburn 1278: 'answerdisplay',$token,'50').
1.12 www 1279: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1280: } elsif ($target eq 'modified') {
1281: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.88 www 1282: $safeeval,'width','height','xlabel','xmin','xmax','ylabel','ymin','ymax',
1.47 www 1283: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
1.12 www 1284: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.3 www 1285:
1.12 www 1286: } elsif ($target eq 'meta') {
1.10 www 1287: $result=&Apache::response::meta_package_write('functionplotresponse');
1.35 www 1288: } elsif (($target eq 'answer') &&
1289: ($env{'form.answer_output_mode'} ne 'tex') &&
1290: ($Apache::lonhomework::viewgrades == 'F')) {
1291: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
1292: $uname =~s/\W//g;
1293: $udom =~s/\W//g;
1294: my $function_name =
1295: join('_','LONCAPA_scriptvars',$uname,$udom,
1296: $env{'form.counter'},$Apache::lonxml::curdepth);
1.89 www 1297: &Apache::lonxml::add_script_result(
1.90 ! www 1298: &Apache::loncommon::modal_adhoc_window($function_name,700,500,
! 1299: '<pre>'.$Apache::functionplotresponse::ruleslog.'</pre>',
! 1300: &mt('Rules Log'))."<br />");
! 1301: }
1.1 www 1302: return $result;
1303: }
1304:
1.25 www 1305: sub compare_rel {
1.26 www 1306: my ($relationship,$value,$realval,$tol)=@_;
1.36 www 1307: # is the real value undefined?
1.26 www 1308: unless (defined($realval)) {
1.36 www 1309: # the real value is not defined
1.26 www 1310: if ($relationship eq 'eq') {
1311: if ($value eq 'undef') {
1312: return 1;
1313: } else {
1314: return 0;
1315: }
1316: } elsif ($relationship eq 'ne') {
1317: if ($value eq 'undef') {
1318: return 0;
1319: } else {
1320: return 1;
1321: }
1322: } else {
1323: return 0;
1324: }
1325: }
1326:
1.36 www 1327: # is the expected value undefined?
1328: if ($value eq 'undef') {
1329: # but by now we know that the real value is defined
1330: return 0;
1331: }
1332:
1333: # both are defined.
1.26 www 1334: if ($relationship eq 'gt') {
1335: return ($realval>$value);
1336: } elsif ($relationship eq 'ge') {
1337: return ($realval>$value-$tol);
1338: } elsif ($relationship eq 'lt') {
1339: return ($realval<$value);
1340: } elsif ($relationship eq 'le') {
1341: return ($realval<$value+$tol);
1342: } elsif ($relationship eq 'ne') {
1343: return (abs($value-$realval)>$tol);
1344: } else {
1345: return (abs($value-$realval)<$tol);
1346: }
1.25 www 1347: return 0;
1348: }
1349:
1.35 www 1350: sub addlog {
1351: my ($text)=@_;
1.67 www 1352: $text=~s/\'/\\\'/g;
1.35 www 1353: $Apache::functionplotresponse::ruleslog.=$text.'<br />';
1354: }
1355:
1356: sub actualval {
1357: my ($i,$xmin,$xmax)=@_;
1358: return $xmin+$i/400.*($xmax-$xmin);
1359: }
1.65 www 1360:
1.66 www 1361: sub fpr_val {
1362: my ($arg)=@_;
1363: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg},
1364: $Apache::functionplotresponse::fpr_xmin,
1365: $Apache::functionplotresponse::fpr_xmax);
1366: }
1367:
1.65 www 1368: sub fpr_f {
1369: my ($arg)=@_;
1370: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin,
1371: $Apache::functionplotresponse::fpr_xmax,
1372: $arg)];
1373: }
1374:
1375: sub fpr_dfdx {
1376: my ($arg)=@_;
1377: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin,
1378: $Apache::functionplotresponse::fpr_xmax,
1379: $arg)];
1380: }
1381:
1382: sub fpr_d2fdx2 {
1383: my ($arg)=@_;
1384: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin,
1385: $Apache::functionplotresponse::fpr_xmax,
1386: $arg)];
1387: }
1.77 www 1388:
1.84 www 1389: sub fpr_vectorcoords {
1390: my ($arg)=@_;
1391: $arg=~s/\W//gs;
1392: $arg=ucfirst($arg);
1393: my $id=$Apache::inputtags::response[-1];
1394: my $partid=$Apache::inputtags::part;
1395: my $internalid = $partid.'_'.$id;
1396: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_x'},
1397: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_x'},
1398: $env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_y'},
1399: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_y'});
1400: }
1401:
1402: sub fpr_objectcoords {
1403: my ($arg)=@_;
1404: $arg=~s/\W//gs;
1405: $arg=ucfirst($arg);
1406: my $id=$Apache::inputtags::response[-1];
1407: my $partid=$Apache::inputtags::part;
1408: my $internalid = $partid.'_'.$id;
1409: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'_x'},
1410: $env{'form.HWVAL_'.$internalid.'_'.$arg.'_y'});
1411: }
1412:
1413: sub fpr_vectorlength {
1414: my ($arg)=@_;
1415: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg);
1416: return sqrt(($xe-$xs)*($xe-$xs)+($ye-$ys)*($ye-$ys));
1417: }
1418:
1419: sub fpr_vectorangle {
1420: my ($arg)=@_;
1421: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg);
1422: my $angle=57.2957795*atan2(($ye-$ys),($xe-$xs));
1423: if ($angle<0) { $angle=360+$angle; }
1424: return $angle;
1425: }
1.77 www 1426:
1427: sub vectorcoords {
1428: my ($id,$label)=@_;
1429: return ($env{'form.HWVAL_'.$id.'_'.$label.'Start_x'},
1430: $env{'form.HWVAL_'.$id.'_'.$label.'End_x'},
1431: $env{'form.HWVAL_'.$id.'_'.$label.'Start_y'},
1432: $env{'form.HWVAL_'.$id.'_'.$label.'End_y'});
1433: }
1434:
1435: sub objectcoords {
1436: my ($id,$label)=@_;
1437: return ($env{'form.HWVAL_'.$id.'_'.$label.'_x'},
1438: $env{'form.HWVAL_'.$id.'_'.$label.'_y'});
1439: }
1.81 www 1440:
1441: sub attached {
1.87 www 1442: my ($id,$vector,$objects,$xmin,$xmax,$ymin,$ymax)=@_;
1.81 www 1443: my ($xs,$xe,$ys,$ye)=&vectorcoords($id,$vector);
1444: my $tolx=($xmax-$xmin)/100.;
1445: my $toly=($ymax-$ymin)/100.;
1446: my $tail=0;
1447: my $tip=0;
1.87 www 1448: foreach my $obj (split(/\s*\,\s*/,$objects)) {
1449: $obj=~s/\W//g;
1450: unless ($obj) { next; }
1451: $obj=ucfirst($obj);
1452: my ($xo,$yo)=&objectcoords($id,$obj);
1453: &addlog("Proximity $vector ($xs,$ys)-($xe,$ye) to $obj ($xo,$yo)");
1454: if ((abs($xs-$xo)<$tolx) && (abs($ys-$yo)<$toly)) {
1455: $tail=1;
1456: &addlog("Attached tail: $obj");
1457: }
1458: if ((abs($xe-$xo)<$tolx) && (abs($ye-$yo)<$toly)) {
1459: $tip=1;
1460: &addlog("Attached tip: $obj");
1461: }
1462: }
1.81 www 1463: &addlog("Result tail:$tail tip:$tip");
1464: return($tail,$tip);
1465: }
1466:
1.77 www 1467:
1468: sub vectorangle {
1469: my ($x,$y)=@_;
1.78 www 1470: my $angle=57.2957795*atan2($y,$x);
1471: if ($angle<0) { $angle=360+$angle; }
1472: return $angle;
1.77 www 1473: }
1474:
1475: sub vectorlength {
1476: my ($x,$y)=@_;
1477: return sqrt($x*$x+$y*$y);
1478: }
1479:
1.78 www 1480: sub relvector {
1481: my ($xs,$xe,$ys,$ye)=@_;
1482: return ($xe-$xs,$ye-$ys);
1483: }
1484:
1485: sub plotvectorlength {
1486: return &vectorlength(&relvector(&vectorcoords(@_)));
1487: }
1488:
1489: sub plotvectorangle {
1490: return &vectorangle(&relvector(&vectorcoords(@_)));
1491: }
1492:
1.77 www 1493:
1494: #
1495: # Evaluate a functionplotvectorrule
1496: #
1497:
1498: sub functionplotvectorrulecheck {
1499: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1.78 www 1500: &addlog("=================");
1.77 www 1501: my ($label,$type)=split(/\:/,$rule);
1502: if ($type eq 'vector') {
1503: return &vectorcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
1504: } elsif ($type eq 'sum') {
1505: return &sumcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
1.85 www 1506: } elsif ($type eq 'custom') {
1507: return &customcheck($rule,$safeeval);
1.77 www 1508: }
1509: }
1510:
1511: sub vectorcheck {
1512: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1513: my ($label,$type,$id,$vector,
1514: $attachpoint,$notattachpoint,
1515: $tailpoint,$tippoint,$nottailpoint,$nottippoint,
1.79 www 1516: $length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule);
1.78 www 1517: &addlog("Vector Rule $label for vector ".$vector);
1.79 www 1518: if ($length ne '') {
1519: &addlog("Checking for length $length with error $lengtherror");
1520: $length=&Apache::run::run($length,$safeeval);
1521: &addlog("Length evaluated to $length");
1522: my $thislength=&plotvectorlength($id,$vector);
1523: &addlog("Found length $thislength");
1524: if (abs($thislength-$length)>$lengtherror) {
1525: &setfailed($label);
1526: return 0;
1527: }
1528: }
1.80 www 1529: if ($angle ne '') {
1530: &addlog("Checking for angle $angle with error $angleerror");
1531: $angle=&Apache::run::run($angle,$safeeval);
1532: &addlog("Angle evaluated to $angle");
1533: my $thisangle=&plotvectorangle($id,$vector);
1534: &addlog("Found angle $thisangle");
1535: my $anglediff=abs($thisangle-$angle);
1536: &addlog("Angle difference: $anglediff");
1537: if ($anglediff>360.-$anglediff) {
1538: $anglediff=360.-$anglediff;
1539: }
1540: &addlog("Smallest angle difference: $anglediff");
1541: if ($anglediff>$angleerror) {
1542: &setfailed($label);
1543: return 0;
1544: }
1545: }
1.81 www 1546: if ($attachpoint ne '') {
1547: &addlog("Checking attached: ".$attachpoint);
1548: my ($tail,$tip)=&attached($id,$vector,$attachpoint,$xmin,$xmax,$ymin,$ymax);
1549: unless ($tail || $tip) {
1550: &setfailed($label);
1551: return 0;
1552: }
1553: }
1554: if ($notattachpoint ne '') {
1555: &addlog("Checking not attached: ".$notattachpoint);
1556: my ($tail,$tip)=&attached($id,$vector,$notattachpoint,$xmin,$xmax,$ymin,$ymax);
1557: if ($tail || $tip) {
1558: &setfailed($label);
1559: return 0;
1560: }
1561: }
1562: if ($tailpoint ne '') {
1563: &addlog("Checking tail: ".$tailpoint);
1564: my ($tail,$tip)=&attached($id,$vector,$tailpoint,$xmin,$xmax,$ymin,$ymax);
1565: unless ($tail) {
1566: &setfailed($label);
1567: return 0;
1568: }
1569: }
1570: if ($nottailpoint ne '') {
1571: &addlog("Checking not tail: ".$nottailpoint);
1572: my ($tail,$tip)=&attached($id,$vector,$nottailpoint,$xmin,$xmax,$ymin,$ymax);
1573: if ($tail) {
1574: &setfailed($label);
1575: return 0;
1576: }
1577: }
1578: if ($tippoint ne '') {
1579: &addlog("Checking tip: ".$tippoint);
1580: my ($tail,$tip)=&attached($id,$vector,$tippoint,$xmin,$xmax,$ymin,$ymax);
1581: unless ($tip) {
1582: &setfailed($label);
1583: return 0;
1584: }
1585: }
1586: if ($nottippoint ne '') {
1587: &addlog("Checking not tip: ".$nottippoint);
1588: my ($tail,$tip)=&attached($id,$vector,$nottippoint,$xmin,$xmax,$ymin,$ymax);
1589: if ($tip) {
1590: &setfailed($label);
1591: return 0;
1592: }
1593: }
1594:
1.79 www 1595: &addlog("Rule $label passed.");
1596: return 1;
1.77 www 1597: }
1598:
1599: sub sumcheck {
1600: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1.82 www 1601: my ($label,$type,$id,$vectors,$length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule);
1602: &addlog("Vector Sum Rule $label for vectors ".$vectors);
1603: my $sumx=0;
1604: my $sumy=0;
1605: foreach my $sv (split(/\s*\,\s*/,$vectors)) {
1606: my ($rx,$ry)=&relvector(&vectorcoords($id,$sv));
1607: $sumx+=$rx;
1608: $sumy+=$ry;
1609: }
1610: &addlog("Sum vector ($sumx,$sumy)");
1.83 www 1611: if ($length ne '') {
1612: &addlog("Checking length $length with error $lengtherror");
1613: $length=&Apache::run::run($length,$safeeval);
1614: &addlog("Evaluated to $length");
1615: my $thislength=&vectorlength($sumx,$sumy);
1616: &addlog("Actual length $thislength");
1617: if (abs($length-$thislength)>$lengtherror) {
1618: &setfailed($label);
1619: return 0;
1620: }
1621: }
1622: if ($angle ne '') {
1623: &addlog("Checking angle $angle with error $angleerror");
1624: $angle=&Apache::run::run($angle,$safeeval);
1625: &addlog("Evaluated to $angle");
1626: my $thisangle=&vectorangle($sumx,$sumy);
1627: &addlog("Actual angle $thisangle");
1628: my $anglediff=abs($thisangle-$angle);
1629: &addlog("Angle difference: $anglediff");
1630: if ($anglediff>360.-$anglediff) {
1631: $anglediff=360.-$anglediff;
1632: }
1633: &addlog("Smallest angle difference: $anglediff");
1634: if ($anglediff>$angleerror) {
1635: &setfailed($label);
1636: return 0;
1637: }
1638: }
1.79 www 1639: &addlog("Rule $label passed.");
1640: return 1;
1.77 www 1641: }
1642:
1.85 www 1643: sub customcheck {
1644: my ($rule,$safeeval)=@_;
1645: my ($label,$type,$prg)=split(/\:/,$rule);
1646: &addlog("Custom Rule ".$label);
1647: my $result=&Apache::run::run(&unescape($prg),$safeeval);
1648: &addlog("Algorithm returned $result");
1649: unless ($result) {
1650: &setfailed($label);
1651: return 0;
1652: }
1653: &addlog("Rule $label passed.");
1654: return 1;
1655: }
1656:
1.77 www 1657: #
1658: # Evaluate a functionplotrule
1659: #
1.35 www 1660:
1.25 www 1661: sub functionplotrulecheck {
1.65 www 1662: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
1.33 www 1663:
1.35 www 1664: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
1.25 www 1665: =split(/\:/,$rule);
1.33 www 1666: $percent=($percent>0?$percent:5);
1.35 www 1667: &addlog("=================");
1.42 www 1668: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
1.65 www 1669: #
1670: # Evaluate the value
1671: #
1672: if ($value=~/\D/) {
1673: $Apache::functionplotresponse::fpr_xmin=$xmin;
1674: $Apache::functionplotresponse::fpr_xmax=$xmax;
1675: $value=&Apache::run::run($value,$safeeval);
1676: &addlog("Value evaluated to $value");
1677: }
1678:
1679: #
1680: # Minimum and maximum lengths of the interval
1681: #
1.49 www 1682: if ((defined($minimumlength)) || (defined($maximumlength))) {
1683: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
1684: }
1.30 www 1685: my $li=0;
1686: my $lh=400;
1687:
1.31 www 1688: # Special case: the upper boundary was not defined
1689: # and needs to be set to the value where
1690: # the condition is not true anymore => set flag
1691:
1692: my $findupper=0;
1693: if (($xfinal eq '')
1694: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
1695: && ($xfinallabel)) {
1696: $findupper=1;
1697: }
1698:
1.25 www 1699: # if a hard value is set for the boundaries, it overrides the label
1.30 www 1700: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
1701: $li=&array_index($xmin,$xmax,$xinitial);
1702: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
1703: }
1704: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
1705: $lh=&array_index($xmin,$xmax,$xfinal);
1706: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
1.25 www 1707: }
1.31 www 1708: # if the label is defined, use it
1.25 www 1709: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
1.35 www 1710: &addlog("Using lower label $xinitiallabel");
1.30 www 1711: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
1712: } else {
1713: $li=&array_index($xmin,$xmax,$xinitial);
1.25 www 1714: }
1.31 www 1715: unless ($findupper) {
1716: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
1.35 www 1717: &addlog("Using upper label $xfinallabel");
1.33 www 1718: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
1.31 www 1719: } else {
1720: $lh=&array_index($xmin,$xmax,$xfinal);
1721: }
1.25 www 1722: }
1723: # Basic sanity checks
1.30 www 1724: if ($li<0) { $li=0; }
1725: if ($lh>400) { $lh=400; }
1.38 www 1726: if (($li>$lh) || (!defined($lh))) {
1.30 www 1727: $lh=$li;
1.25 www 1728: }
1.31 www 1729:
1.35 www 1730: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
1731: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
1732: if ($findupper) {
1733: &addlog("Looking for label $xfinallabel");
1734: }
1.33 www 1735: my $tol=$percent*($ymax-$ymin)/100;
1736: if ($xmax>$xmin) {
1737: if ($derivative==2) {
1738: $tol=4.*$tol/($xmax-$xmin);
1739: } elsif ($derivative==1) {
1740: $tol=2.*$tol/($xmax-$xmin);
1.42 www 1741: } elsif ($derivative==-1) {
1742: $tol=$tol*($xmax-$xmin)/2.;
1.33 www 1743: }
1.27 www 1744: }
1.42 www 1745: my $integral=0;
1746: my $binwidth=($xmax-$xmin)/400.;
1747: if (($derivative<0) && (!$findupper)) {
1748: # definite integral, calculate over whole length
1749: &addlog("Calculating definite integral");
1750: for (my $i=$li; $i<=$lh; $i++) {
1751: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1752: }
1753: unless (&compare_rel($relationship,$value,$integral,$tol)) {
1754: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
1755: &addlog("Rule $label failed.");
1.79 www 1756: &setfailed($label);
1.42 www 1757: return 0;
1758: }
1759: } else {
1760: for (my $i=$li; $i<=$lh; $i++) {
1.25 www 1761: my $val;
1762: if ($derivative==2) {
1.27 www 1763: $val=$Apache::functionplotresponse::d2funcdx2[$i];
1.25 www 1764: } elsif ($derivative==1) {
1.27 www 1765: $val=$Apache::functionplotresponse::dfuncdx[$i];
1.42 www 1766: } elsif ($derivative==-1) {
1767: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
1768: $val=$integral;
1.25 www 1769: } else {
1.27 www 1770: $val=$Apache::functionplotresponse::func[$i];
1.25 www 1771: }
1.31 www 1772: unless (&compare_rel($relationship,$value,$val,$tol)) {
1.37 www 1773: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
1.35 www 1774: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
1.31 www 1775: if (($findupper) && ($i>$li)) {
1.49 www 1776: # Check lengths
1777: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1778: # Successfully found a new label, set it
1.31 www 1779: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
1.35 www 1780: &addlog("Rule $label passed, setting label $xfinallabel");
1.31 www 1781: return 1;
1782: } else {
1.35 www 1783: &addlog("Rule $label failed.");
1.49 www 1784: &setfailed($label);
1.31 www 1785: return 0;
1786: }
1787: }
1.42 www 1788: }
1.25 www 1789: }
1.49 www 1790: # Corner case where this makes sense: using start or stop as defined labels
1791: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
1.35 www 1792: &addlog("Rule $label passed.");
1.27 www 1793: return 1;
1.24 www 1794: }
1795:
1.49 www 1796: #
1797: # check for minimum and maximum lengths
1798: #
1799:
1800: sub checklength {
1801: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
1802: unless (($minimumlength) || ($maximumlength)) { return 1; }
1803: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
1804: if ($minimumlength) {
1805: if ($length<$minimumlength) {
1806: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
1807: &setfailed($label);
1808: return 0;
1809: }
1810: }
1811: if ($maximumlength) {
1812: if ($length>$maximumlength) {
1813: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
1814: &setfailed($label);
1815: return 0;
1816: }
1817: }
1818: return 1;
1819: }
1820:
1821: sub setfailed {
1.79 www 1822: my ($hintlabel)=@_;
1.49 www 1823: $hintlabel=~s/^R//;
1824: push(@Apache::functionplotresponse::failedrules,$hintlabel);
1825: &addlog("Set hint condition $hintlabel");
1826: }
1827:
1.37 www 1828: sub start_functionplotruleset {
1829: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1830: if ($target eq 'edit') {
1831: return &Apache::edit::start_table($token).
1832: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
1833: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1834: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 1835: &Apache::edit::insertlist($target,$token).' '
1836: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
1.37 www 1837: .'</span></td>'
1838: ."<td> "
1839: .&Apache::edit::end_row()
1840: .&Apache::edit::start_spanning_row()
1841: ."\n";
1842: }
1843: }
1.3 www 1844:
1.37 www 1845: sub end_functionplotruleset {
1846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1847: my $id=$Apache::inputtags::response[-1];
1848: my $partid=$Apache::inputtags::part;
1849: my $internalid = $partid.'_'.$id;
1850:
1851: if ($target eq 'edit' ) {
1852: return &Apache::edit::end_table();
1853: } elsif ($target eq 'grade'
1.10 www 1854: && &Apache::response::submitted()
1855: && $Apache::lonhomework::type ne 'exam') {
1.12 www 1856: #
1857: # Actually grade
1858: #
1.41 www 1859: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.27 www 1860:
1.24 www 1861: my $ad='';
1.30 www 1862: undef %Apache::functionplotresponse::functionplotrulelabels;
1.35 www 1863: $Apache::functionplotresponse::ruleslog='';
1.30 www 1864: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
1865: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
1.64 www 1866: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') {
1.21 www 1867: $ad='NOT_FUNCTION';
1.18 www 1868: } else {
1.35 www 1869: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
1870: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
1871: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
1872: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
1873:
1.24 www 1874: # We have a function that we can actually grade, go through the spline rules.
1.25 www 1875: foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
1.65 www 1876: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1.24 www 1877: $ad='INCORRECT';
1878: last;
1879: }
1880: }
1.77 www 1881: # And now go through the vector rules
1882: foreach my $rule (@Apache::functionplotresponse::functionplotvectorrules) {
1883: unless (&functionplotvectorrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
1884: $ad='INCORRECT';
1885: last;
1886: }
1887: }
1.24 www 1888: # If it's not wrong, it's correct
1889: unless ($ad) { $ad='EXACT_ANS' };
1.18 www 1890: }
1.37 www 1891: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
1892: &addlog("Assigned award detail: $ad");
1893: # Store for later to be assigned at end_functionplotresponse
1894: $Apache::functionplotresponse::awarddetail=$ad;
1895: }
1896: }
1897:
1898:
1899: sub end_functionplotresponse {
1900: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1901: &Apache::response::end_response;
1902:
1903: my $result;
1904: my $id=$Apache::inputtags::response[-1];
1905: my $partid=$Apache::inputtags::part;
1906: my $internalid = $partid.'_'.$id;
1.20 www 1907:
1.37 www 1908: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1909: if ($target eq 'grade'
1910: && &Apache::response::submitted()
1911: && $Apache::lonhomework::type eq 'exam') {
1912:
1913: &Apache::response::scored_response($partid,$id);
1914:
1915: } elsif ($target eq 'grade'
1916: && &Apache::response::submitted()
1917: && $Apache::lonhomework::type ne 'exam') {
1918: my ($response,%coords)=&get_answer_from_form_fields($internalid);
1919: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
1920: my %previous=&Apache::response::check_for_previous($response,$partid,$id);
1921: #
1922: # Assign grade
1923: #
1924: my $ad=$Apache::functionplotresponse::awarddetail;
1.12 www 1925: #
1926: # Store grading info
1927: #
1928: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
1929: &Apache::response::handle_previous(\%previous,$ad);
1.10 www 1930: } elsif ($target eq 'web') {
1.37 www 1931: undef @Apache::functionplotresponse::failedrules;
1932: }
1933: return $result;
1934: }
1935:
1936: sub end_functionplotelements {
1937: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1938: my $result='';
1939: my $id=$Apache::inputtags::response[-1];
1940: my $partid=$Apache::inputtags::part;
1941: my $internalid = $partid.'_'.$id;
1942: if ($target eq 'edit' ) {
1943: $result=&Apache::edit::end_table();
1944: } elsif ($target eq 'web') {
1.47 www 1945: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1946:
1947: # Are we in show answer mode?
1948: my $showanswer=&Apache::response::show_answer();
1949: if ($showanswer) {
1950: # Render answerdisplay
1951: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
1952: if ($answerdisplay=~/\S/s) {
1953: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
1.58 www 1954: my @components=split(/\s*\:\s*/,$plot);
1955: if ($#components<3) {
1956: # Just a simple plot
1957: my ($func,$xl,$xh)=@components;
1958: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
1959: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
1960: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
1961: } else {
1962: # This is a spline
1.59 www 1963: $result.=&answer_spline_script($internalid,@components);
1.58 www 1964: }
1.47 www 1965: }
1966: }
1967: }
1.48 www 1968: my $fixed=0;
1969: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
1.6 www 1970: # Now is the time to render all of the stored splines
1971: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1.48 www 1972: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
1.6 www 1973: }
1.5 www 1974: # close the init script
1.3 www 1975: $result.=&end_init_script();
1.17 www 1976: # register all splines in this response
1977: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
1978: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
1979: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
1980: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
1981: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
1982: }
1.9 www 1983: # generate the input fields
1984: $result.=$Apache::functionplotresponse::inputfields;
1.5 www 1985: # actually start the <applet>-tag
1.88 www 1986: $result.=&geogebra_startcode($internalid,
1987: &Apache::lonxml::get_param('width',$parstack,$safeeval,-2),
1988: &Apache::lonxml::get_param('height',$parstack,$safeeval,-2));
1.5 www 1989: # load the spline bytecode
1.3 www 1990: $result.=&geogebra_spline_program();
1.5 www 1991: # set default parameters
1.3 www 1992: $result.=&geogebra_default_parameters($internalid);
1.5 www 1993: # close the <applet>-tag
1.1 www 1994: $result.=&geogebra_endcode();
1995: }
1996: return $result;
1997: }
1998:
1.41 www 1999: sub boundaries {
2000: my ($parstack,$safeeval,$level)=@_;
2001: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
2002: $xmin=(defined($xmin)?$xmin:-10);
2003: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
2004: $xmax=(defined($xmax)?$xmax:10);
2005: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
2006: $ymin=(defined($ymin)?$ymin:-10);
2007: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
2008: $ymax=(defined($ymax)?$ymax:10);
2009: if ($xmax<=$xmin) {
2010: $xmax=$xmin+20;
2011: }
2012: if ($ymax<=$ymin) {
2013: $ymax=$ymin+20;
2014: }
2015: return ($xmin,$xmax,$ymin,$ymax);
2016: }
2017:
1.37 www 2018: sub start_functionplotelements {
2019: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
2020: my $result='';
2021: my $id=$Apache::inputtags::response[-1];
2022: my $partid=$Apache::inputtags::part;
2023: my $internalid = $partid.'_'.$id;
2024:
2025: if ($target eq 'edit') {
2026: return &Apache::edit::start_table($token).
2027: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
2028: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
2029: .&Apache::edit::deletelist($target,$token).' '.
1.50 www 2030: &Apache::edit::insertlist($target,$token).' '
2031: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
1.37 www 2032: .'</span></td>'
2033: ."<td> "
2034: .&Apache::edit::end_row()
2035: .&Apache::edit::start_spanning_row()
2036: ."\n";
2037: } elsif ($target eq 'web') {
1.41 www 2038: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
1.37 www 2039: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2040: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2041: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
2042: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
2043: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
2044:
2045:
2046: # paste in the update routine to receive stuff back from the applet
2047: $result.=&update_script($internalid);
2048: # start the initscript for this applet
2049: $result.=&start_init_script($internalid);
2050: # put the axis commands inside
2051: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
1.45 www 2052: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
1.37 www 2053: # init script is left open
2054: }
2055: return $result;
2056: }
2057:
1.1 www 2058: 1;
2059:
2060: __END__
2061:
2062: =head1 NAME
2063:
2064: Apache::functionplotresponse.pm;
2065:
2066: =head1 SYNOPSIS
2067:
2068: Handles tags associated with accepting function plots.
2069:
2070: This is part of the LearningOnline Network with CAPA project
2071: described at http://www.lon-capa.org.
2072:
2073: =head1 HANDLER SUBROUTINE
2074:
2075: start_functionplotresponse()
2076:
2077: =head1 OTHER SUBROUTINES
2078:
2079: =over
2080:
2081: =item end_functionplotresponse()
2082:
2083: =back
2084:
2085: =cut
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