loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
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Thu Nov 11 03:52:35 2010 UTC (13 years, 6 months ago) by www
Branches: MAIN
CVS tags: HEAD

* Implement tolerance on rule-level
* Template

1: # LearningOnline Network with CAPA 2: # option list style responses 3: # 4: # $Id: functionplotresponse.pm,v 1.33 2010/11/11 03:52:35 www Exp $ 5: # 6: # Copyright Michigan State University Board of Trustees 7: # 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 9: # 10: # LON-CAPA is free software; you can redistribute it and/or modify 11: # it under the terms of the GNU General Public License as published by 12: # the Free Software Foundation; either version 2 of the License, or 13: # (at your option) any later version. 14: # 15: # LON-CAPA is distributed in the hope that it will be useful, 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18: # GNU General Public License for more details. 19: # 20: # You should have received a copy of the GNU General Public License 21: # along with LON-CAPA; if not, write to the Free Software 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23: # 24: # /home/httpd/html/adm/gpl.txt 25: # 26: # http://www.lon-capa.org/ 27: # 28: 29: package Apache::functionplotresponse; 30: use strict; 31: use Apache::response(); 32: use Apache::lonlocal; 33: use Apache::lonnet; 34: 35: BEGIN { 36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline','functionplotrule')); 37: } 38: 39: # 40: # There can be a number of applets on a page, each called ggbApplet_$id, 41: # where $id is the "_"-concatenated part and responseid 42: # 43: 44: sub geogebra_startcode { 45: my ($id)=@_; 46: return (<<ENDSTARTCODE); 47: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar" 48: codebase="/adm/geogebra/" width="714" height="447" MAYSCRIPT> 49: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/> 50: ENDSTARTCODE 51: } 52: 53: sub geogebra_endcode { 54: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n"; 55: } 56: 57: # 58: # This is the internal GeoGebra bytecode which defines the spline functions 59: # 60: sub geogebra_spline_program { 61: return (<<ENDSPLINEPROGRAM); 62: <param name="ggbBase64" value="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63: ENDSPLINEPROGRAM 64: } 65: 66: # 67: # The standard set of parameters inside <applet> 68: # 69: sub geogebra_default_parameters { 70: my ($id)=@_; 71: return(<<ENDDEFAULTPARAMETERS); 72: <param name="image" value="/adm/lonIcons/lonanim.gif" /> 73: <param name="boxborder" value="false" /> 74: <param name="centerimage" value="true" /> 75: <param name="java_arguments" value="-Xmx512m" /> 76: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_properties.jar" /> 77: <param name="cache_version" value="3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0" /> 78: <param name="framePossible" value="false" /> 79: 80: <param name="showResetIcon" value="false" /> 81: <param name="showAnimationButton" value="false" /> 82: <param name="enableRightClick" value="false" /> 83: <param name="errorDialogsActive" value="true" /> 84: <param name="enableLabelDrags" value="false" /> 85: <param name="showMenuBar" value="false" /> 86: <param name="showToolBar" value="false" /> 87: <param name="showToolBarHelp" value="false" /> 88: <param name="showAlgebraInput" value="false" /> 89: <param name="enableShiftDragZoom" value="false" /> 90: <param name="allowRescaling" value="false" /> 91: <param name="enableLabelDrags" value="false" /> 92: <param name="ggbOnInitParam" value="applet_$id" /> 93: ENDDEFAULTPARAMETERS 94: } 95: 96: # 97: # This subroutine is called by LON-CAPA at </problem> 98: # Each applet on the page will call function ggbOnInit when it is done loading 99: # This function in turn will call the respective function registered by start_init_script 100: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit 101: # 102: 103: sub init_script { 104: if ($#Apache::functionplotresponse::callscripts>=0) { 105: my $script=''; 106: foreach my $id (@Apache::functionplotresponse::callscripts) { 107: $script.="if (param=='applet_$id') { loaded_$id=true; }\n"; 108: } 109: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)). 110: ") { setTimeout('ggbInitAll()',20) }"; 111: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts)); 112: return (<<ENDGGBINIT); 113: <script type="text/javascript"> 114: // <![CDATA[ 115: // Function that each applet will call when loaded 116: // It will pass "its" parameter 117: // Set flags for when an applet is loaded, wait till all are loaded, and then some 118: function ggbOnInit(param) { 119: $script 120: } 121: function ggbInitAll() { 122: $calls 123: } 124: // ]]> 125: </script> 126: ENDGGBINIT 127: } 128: } 129: 130: # 131: # Each Geogebra applet is supposed to call this when parameters change 132: # Changes the hidden fields on the web page 133: # 134: sub update_script { 135: my ($id)=@_; 136: return (<<ENDUPDATESCRIPT); 137: <script type="text/javascript"> 138: // <![CDATA[ 139: function updatePointCoordinates_$id(coordinateName) { 140: var x = document.ggbApplet_$id.getXcoord(coordinateName); 141: var y = document.ggbApplet_$id.getYcoord(coordinateName); 142: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x; 143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y; 144: } 145: // ]]> 146: </script> 147: ENDUPDATESCRIPT 148: } 149: 150: # 151: # Register the above update-handler for a variable 152: # 153: 154: sub update_register { 155: my ($id,$variable)=@_; 156: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n"; 157: } 158: 159: # 160: # Set a coordinate variable 161: # 162: sub set_coordinate { 163: my ($id,$variable,$x,$y)=@_; 164: return (<<ENDSETVARIABLE); 165: document.ggbApplet_$id.evalCommand("$variable=($x,$y)"); 166: ENDSETVARIABLE 167: } 168: 169: # 170: # Input field name for a coordinate variable 171: # 172: 173: sub field_name { 174: my ($id,$variable,$name)=@_; 175: return "HWVAL_$id\_$variable\_$name"; 176: } 177: 178: # 179: # Generate an input field for a coordinate variable 180: # 181: 182: sub generate_input_field { 183: my ($id,$variable,$x,$y)=@_; 184: $Apache::functionplotresponse::inputfields.= 185: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 186: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 187: } 188: 189: # 190: # Initialize a new coordinate variable at set a listener on it 191: # 192: sub new_coordinate { 193: my ($id,$variable,$x,$y)=@_; 194: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 195: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 196: } 197: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 198: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 199: } 200: &generate_input_field($id,$variable,$x,$y); 201: return &set_coordinate($id,$variable,$x,$y).&update_register($id,$variable); 202: } 203: 204: # 205: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 206: # It then starts the right headers 207: # 208: sub start_init_script { 209: my ($id)=@_; 210: # Add id to the list of ggbInit_$id functions that need to be called 211: push(@Apache::functionplotresponse::callscripts,$id); 212: # ... and open this function 213: return (<<ENDSTARTINIT); 214: <script type="text/javascript"> 215: // <![CDATA[ 216: // variable that will eventually be passed back to the server 217: var coordinateMap_$id = []; 218: // flag for not loaded yet 219: var loaded_$id=false; 220: // Init-function for applet 221: function ggbInit_$id() { 222: ENDSTARTINIT 223: } 224: 225: # 226: # This sets the axes inside ggbInit_$id 227: # 228: 229: sub axes_script { 230: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 231: return (<<ENDAXESSCRIPT); 232: // changes (xmin, xmax, ymin, ymax) 233: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 234: 235: // makes the (x,y) axis (in)visible 236: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 237: // makes the grid (in)visible 238: document.ggbApplet_$id.setGridVisible($gvisible); 239: ENDAXESSCRIPT 240: } 241: 242: sub axes_label { 243: my ($id,$xlabel,$ylabel)=@_; 244: unless ($xlabel || $ylabel) { return ''; } 245: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 246: if ($xlabel) { 247: $return.=(<<ENDXAXISLABELSCRIPT); 248: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 249: document.ggbApplet_$id.setVisible("Xlabel",false); 250: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 251: ENDXAXISLABELSCRIPT 252: } 253: if ($ylabel) { 254: $return.=(<<ENDYAXISLABELSCRIPT); 255: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 256: document.ggbApplet_$id.setVisible("Ylabel",false); 257: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 258: ENDYAXISLABELSCRIPT 259: } 260: return $return; 261: } 262: 263: sub plot_script { 264: my ($id,$function,$fixed)=@_; 265: if ($fixed) { 266: # Use stupid trick to nail this to a location 267: # Oddly, it seems like only one plot cannot be nailed to a location 268: # Non-nailed-down plots apparently get overwritten 269: return (<<ENDPLOTSCRIPT); 270: document.ggbApplet_$id.evalCommand("a=1"); 271: document.ggbApplet_$id.setVisible("a",false); 272: // This MUST be a DEPENDENT OBJECT in order to be locked down: 273: document.ggbApplet_$id.evalCommand("y=a*($function)"); 274: ENDPLOTSCRIPT 275: } else { 276: return "document.ggbApplet_$id.evalCommand('y=$function')"; 277: } 278: } 279: 280: # 281: # Subroutine that generates code for spline $label based on stored information 282: # 283: 284: sub generate_spline { 285: my ($id,$label)=@_; 286: my $result=''; 287: my $order=$Apache::functionplotresponse::splineorder{$label}; 288: my $x=$Apache::functionplotresponse::splineinitx{$label}; 289: my $y=$Apache::functionplotresponse::splineinity{$label}; 290: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 291: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 292: my @coords=(); 293: foreach my $i (1..$order) { 294: $result.=&new_coordinate($id,$label.'P'.$i,$x,$y); 295: $x+=$sx/(2.*($order-1)); 296: push(@coords,$label.'P'.$i); 297: $result.=&new_coordinate($id,$label.'S'.$i,$x,$y+$sy); 298: $x+=$sx/(2.*($order-1)); 299: push(@coords,$label.'S'.$i); 300: } 301: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 302: return $result; 303: } 304: # 305: # <backgroundplot function="..." fixed="yes/no" /> 306: # 307: sub start_backgroundplot { 308: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 309: my $result=''; 310: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 311: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 312: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 313: 314: unless ($function) { $function="0"; } 315: if ($target eq 'web') { 316: $result.=&plot_script($internalid,$function,$fixed); 317: } elsif ($target eq 'edit') { 318: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 319: &Apache::edit::text_arg('Function:','function', 320: $token,'16'). 321: &Apache::edit::select_arg('Fixed location:','fixed', 322: ['yes','no'],$token). 323: &Apache::edit::end_row(); 324: } elsif ($target eq 'modified') { 325: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 326: $safeeval,'function','fixed'); 327: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 328: } 329: return $result; 330: } 331: 332: sub end_backgroundplot { 333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 334: my $result=''; 335: if ($target eq 'edit') { 336: $result=&Apache::edit::end_table(); 337: } 338: return $result; 339: } 340: 341: # 342: # <functionplotrule ... /> 343: # 344: sub start_functionplotrule { 345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 346: my $result=''; 347: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 348: $Apache::functionplotresponse::counter++; 349: if ($label=~/\W/) { 350: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 351: } 352: $label=~s/\W//gs; 353: unless ($label) { 354: $label='R'.$Apache::functionplotresponse::counter; 355: } else { 356: $label='R'.$label; 357: } 358: if ($Apache::functionplotresponse::splineorder{$label}) { 359: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 360: } 361: 362: 363: if ($target eq 'grade') { 364: # Simply remember - in order - for later 365: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 366: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 367: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 368: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 369: } 370: $beginninglabel=~s/\W//gs; 371: $endinglabel=~s/\W//gs; 372: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 373: $relationship=~s/\W//gs; 374: $relationship=lc($relationship); 375: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 376: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 377: $relationship='eq'; 378: } 379: my $derivative=&Apache::lonxml::get_param('derivative',$parstack,$safeeval); 380: unless (($derivative==0) || ($derivative==1) || ($derivative==2)) { 381: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 382: $derivative=0; 383: } 384: push(@Apache::functionplotresponse::functionplotrules,join(':',( 385: $label, 386: $derivative, 387: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 388: $beginninglabel, 389: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 390: $endinglabel, 391: $relationship, 392: &Apache::lonxml::get_param('value',$parstack,$safeeval), 393: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 394: ))); 395: } elsif ($target eq 'edit') { 396: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule'). 397: &Apache::edit::text_arg('Index:','index', 398: $token,'4').' '. 399: &Apache::edit::select_arg(&mt('Function:'),'derivative', 400: [['0','Function itself'], 401: ['1','First derivative'], 402: ['2','Second derivative']],$token).'<br />'. 403: 404: &Apache::edit::text_arg('(Initial) x-value:','xinitial', 405: $token,'4'). 406: &Apache::edit::select_or_text_arg('(Initial) x-value label:','xinitiallabel', 407: [['start','Start of Plot']],$token,'8').'<br />'. 408: 409: &Apache::edit::text_arg('Optional final x-value for ranges:','xfinal', 410: $token,'4'). 411: &Apache::edit::select_or_text_arg('Optional final x-value label:','xfinallabel', 412: [['end','End of Plot']],$token,'8').'<br />'. 413: 414: &Apache::edit::select_arg(&mt('Relationship:'),'relationship', 415: [['eq','equal'], 416: ['ne','not equal'], 417: ['ge','greater than or equal'], 418: ['gt','greater than'], 419: ['lt','less than'], 420: ['le','less than or equal']],$token). 421: $result.= &Apache::edit::select_or_text_arg('Value:','value', 422: [['undef','not defined']],$token,'4'). 423: &Apache::edit::text_arg('Percent error:','percenterror', 424: $token,'4'). 425: &Apache::edit::end_row(); 426: } elsif ($target eq 'modified') { 427: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 428: $safeeval,'index','derivative','xinitial','xinitiallabel','xfinal','xfinallabel','relationship', 429: 'value','percenterror'); 430: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 431: } 432: return $result; 433: } 434: 435: sub end_functionplotrule { 436: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 437: my $result=''; 438: if ($target eq 'edit') { 439: $result=&Apache::edit::end_table(); 440: } 441: return $result; 442: } 443: 444: 445: # 446: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 447: # 448: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 449: # 450: sub start_spline { 451: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 452: my $result=''; 453: if ($target eq 'web') { 454: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 455: $Apache::functionplotresponse::counter++; 456: if ($label=~/\W/) { 457: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 458: } 459: $label=~s/\W//gs; 460: unless ($label) { 461: $label='S'.$Apache::functionplotresponse::counter; 462: } else { 463: $label='S'.$label; 464: } 465: if ($Apache::functionplotresponse::splineorder{$label}) { 466: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 467: } 468: 469: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 470: if ($order<2) { $order=2; } 471: if ($order>8) { $order=8; } 472: $Apache::functionplotresponse::splineorder{$label}=$order; 473: 474: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 475: unless ($x) { $x=0; } 476: $Apache::functionplotresponse::splineinitx{$label}=$x; 477: 478: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 479: unless ($y) { $y=0; } 480: $Apache::functionplotresponse::splineinity{$label}=$y; 481: 482: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 483: unless ($sx) { $sx=$order; } 484: $Apache::functionplotresponse::splinescalex{$label}=$sx; 485: 486: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 487: unless ($sy) { $sy=2; } 488: $Apache::functionplotresponse::splinescaley{$label}=$sy; 489: } elsif ($target eq 'edit') { 490: $result=&Apache::edit::tag_start($target,$token,'Spline'). 491: &Apache::edit::text_arg('Index:','index', 492: $token,'4').' '. 493: &Apache::edit::select_arg('Order:','order', 494: ['2','3','4','5','6','7','8','9'],$token).' '. 495: &Apache::edit::text_arg('Initial x-value:','initx', 496: $token,'4').' '. 497: &Apache::edit::text_arg('Initial y-value:','inity', 498: $token,'4').' '. 499: &Apache::edit::text_arg('Scale x:','scalex', 500: $token,'4').' '. 501: &Apache::edit::text_arg('Scale y:','scaley', 502: $token,'4'). 503: &Apache::edit::end_row(); 504: } elsif ($target eq 'modified') { 505: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 506: $safeeval,'index','order','initx','inity', 507: 'scalex','scaley'); 508: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 509: } 510: return $result; 511: } 512: 513: sub end_spline { 514: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 515: my $result=''; 516: if ($target eq 'edit') { 517: $result=&Apache::edit::end_table(); 518: } 519: return $result; 520: } 521: 522: sub end_init_script { 523: return (<<ENDENDINIT); 524: } 525: // ]]> 526: </script> 527: ENDENDINIT 528: } 529: 530: # 531: # Storing and restoring spline coordinates from part answers 532: # 533: sub decode_previous_answer { 534: my ($answer)=@_; 535: foreach my $coordinate (split(/\,/,$answer)) { 536: my ($key,$value)=split(/\=/,$coordinate); 537: $Apache::functionplotresponse::previous{$key}=$value; 538: } 539: } 540: 541: sub get_answer_from_form_fields { 542: my ($id)=@_; 543: my $answer=''; 544: my %coords=(); 545: foreach my $field (keys(%env)) { 546: if ($field=~/^form\.HWVAL\_$id/) { 547: $field=~/^form\.(.*)$/; 548: $coords{$1}=$env{$field}; 549: } 550: } 551: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 552: return ($answer,%coords); 553: } 554: 555: # 556: # The following functions calculate the cubic-hermite splines server-side 557: # 558: 559: sub cubic_hermite { 560: my ($t,$p1,$s1,$p2,$s2)=@_; 561: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 5.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 562: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 5.*($t*$t*$t-$t*$t) *($s2-$p2); 563: } 564: 565: # 566: # d/dt(...) 567: # 568: 569: sub ddt_cubic_hermite { 570: my ($t,$p1,$s1,$p2,$s2)=@_; 571: return (6.*$t*$t-6.*$t) *$p1 + 5.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 572: (-6.*$t*$t+6.*$t)*$p2 + 5.*(3.*$t*$t-2.*$t) *($s2-$p2); 573: } 574: 575: # 576: # d^2/dt^2(...) 577: # 578: 579: sub d2dt2_cubic_hermite { 580: my ($t,$p1,$s1,$p2,$s2)=@_; 581: return (12.*$t-6.) *$p1 + 5.*(6.*$t-4.)*($s1-$p1)+ 582: (-12.*$t+6.)*$p2 + 5.*(6.*$t-2.)*($s2-$p2); 583: } 584: 585: # 586: # Array index calculation 587: # 588: sub array_index { 589: my ($xmin,$xmax,$x)=@_; 590: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 591: } 592: 593: # 594: # Populate the arrays 595: # 596: 597: sub populate_arrays { 598: my ($id,$xmin,$xmax)=@_; 599: for (my $i=0; $i<=400; $i++) { 600: $Apache::functionplotresponse::func[$i]=undef; 601: $Apache::functionplotresponse::dfuncdx[$i]=undef; 602: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 603: } 604: unless ($xmax>$xmin) { return 'no_func'; } 605: # Run over all splines in response 606: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 607: my $xiold=-1; 608: # Run over all points in spline 609: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 610: my $ni=$i+1; 611: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 612: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 613: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 614: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 615: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 616: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 617: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 618: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 619: # Run in small steps over spline parameter 620: for (my $t=0; $t<=1; $t+=0.0001) { 621: my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); 622: if ($xi<$xiold) { return 'no_func'; } 623: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 624: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } 625: $xiold=$xi; 626: # Function value 627: my $funcval=&cubic_hermite($t,@yparms); 628: $Apache::functionplotresponse::func[$xi]=$funcval; 629: if (defined($funcval)) { 630: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 631: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 632: } 633: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 634: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 635: } 636: } 637: # Chain rule 638: # dy/dx=dy/dt/(dx/dt) 639: my $dxdt=&ddt_cubic_hermite($t,@xparms); 640: if ($dxdt) { 641: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 642: } 643: # Faa di Bruno 644: # d^2y/dx^2=(d^2y/dt^2)/(dx/dt)^2+(dy/dt)/(d^2x/dt^2) 645: my $d2xdt2=&d2dt2_cubic_hermite($t,@xparms); 646: if (($dxdt) && ($d2xdt2)) { 647: $Apache::functionplotresponse::d2funcdx2[$xi]= 648: &d2dt2_cubic_hermite($t,@yparms)/($dxdt*$dxdt) 649: +&ddt_cubic_hermite($t,@yparms)/$d2xdt2; 650: } 651: } 652: } 653: } 654: } 655: } 656: 657: # 658: # Implentation of <functionplotresponse> 659: # 660: 661: sub start_functionplotresponse { 662: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 663: my $result=''; 664: # To remember the splines - somehow, they need to come last 665: undef %Apache::functionplotresponse::splineorder; 666: undef %Apache::functionplotresponse::splineinitx; 667: undef %Apache::functionplotresponse::splineinity; 668: undef %Apache::functionplotresponse::splinescalex; 669: undef %Apache::functionplotresponse::splinescaley; 670: # Remember input fields, etc 671: undef %Apache::functionplotresponse::previous; 672: $Apache::functionplotresponse::inputfields=''; 673: $Apache::functionplotresponse::counter=0; 674: # Remember rules 675: undef @Apache::functionplotresponse::functionplotrules; 676: # Part and ID 677: my $partid=$Apache::inputtags::part; 678: my $id=&Apache::response::start_response($parstack,$safeeval); 679: # Internal ID to mark the applet and its coordinates 680: my $internalid = $partid.'_'.$id; 681: # Previous answer 682: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 683: 684: # Parameters of <functionplotresponse> 685: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval); 686: $xmin=(defined($xmin)?$xmin:-10); 687: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval); 688: $xmax=(defined($xmax)?$xmax:10); 689: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval); 690: $ymin=(defined($ymin)?$ymin:-10); 691: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); 692: $ymax=(defined($ymax)?$ymax:10); 693: if ($xmax<=$xmin) { 694: &Apache::lonxml::warning('Maximum x-value needs to be larger than minimum value.'); 695: $xmax=$xmin+20; 696: } 697: if ($ymax<=$ymin) { 698: &Apache::lonxml::warning('Maximum y-value needs to be larger than minimum value.'); 699: $ymax=$ymin+20; 700: } 701: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 702: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 703: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 704: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 705: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 706: if ($target eq 'edit') { 707: $result.=&Apache::edit::start_table($token) 708: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 709: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 710: .&Apache::edit::deletelist($target,$token) 711: .'</span></td>' 712: ."<td> " 713: .&Apache::edit::end_row() 714: .&Apache::edit::start_spanning_row() 715: ."\n"; 716: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 717: $token,'6').' '. 718: &Apache::edit::text_arg('Minimum x-value:','xmin', 719: $token,'4').' '. 720: &Apache::edit::text_arg('Maximum x-value:','xmax', 721: $token,'4').' '. 722: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 723: ['yes','no'],$token).'<br />'. 724: &Apache::edit::text_arg('Label y-axis:','ylabel', 725: $token,'6').' '. 726: &Apache::edit::text_arg('Minimum y-value:','ymin', 727: $token,'4').' '. 728: &Apache::edit::text_arg('Maximum y-value:','ymax', 729: $token,'4').' '. 730: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 731: ['yes','no'],$token).'<br />'. 732: &Apache::edit::select_arg('Grid visible:','gridvisible', 733: ['yes','no'],$token). 734: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 735: } elsif ($target eq 'modified') { 736: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 737: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 738: 'xaxisvisible','yaxisvisible','gridvisible'); 739: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 740: 741: } elsif ($target eq 'meta') { 742: $result=&Apache::response::meta_package_write('functionplotresponse'); 743: } elsif ($target eq 'web') { 744: # paste in the update routine to receive stuff back from the applet 745: $result.=&update_script($internalid); 746: # start the initscript for this applet 747: $result.=&start_init_script($internalid); 748: # put the axis commands inside 749: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 750: $result.=&axes_label($internalid,$xlabel,$ylabel); 751: # init script is left open 752: } 753: return $result; 754: } 755: 756: sub compare_rel { 757: my ($relationship,$value,$realval,$tol)=@_; 758: # is the real value defined? 759: unless (defined($realval)) { 760: if ($relationship eq 'eq') { 761: if ($value eq 'undef') { 762: return 1; 763: } else { 764: return 0; 765: } 766: } elsif ($relationship eq 'ne') { 767: if ($value eq 'undef') { 768: return 0; 769: } else { 770: return 1; 771: } 772: } else { 773: return 0; 774: } 775: } 776: 777: # it is defined. 778: if ($relationship eq 'gt') { 779: return ($realval>$value); 780: } elsif ($relationship eq 'ge') { 781: return ($realval>$value-$tol); 782: } elsif ($relationship eq 'lt') { 783: return ($realval<$value); 784: } elsif ($relationship eq 'le') { 785: return ($realval<$value+$tol); 786: } elsif ($relationship eq 'ne') { 787: return (abs($value-$realval)>$tol); 788: } else { 789: return (abs($value-$realval)<$tol); 790: } 791: return 0; 792: } 793: 794: sub functionplotrulecheck { 795: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_; 796: 797: # &Apache::lonnet::logthis("Rule $rule $xmin $xmax $ymin $ymax"); 798: 799: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$relationship,$value,$percent) 800: =split(/\:/,$rule); 801: $percent=($percent>0?$percent:5); 802: 803: my $li=0; 804: my $lh=400; 805: 806: # Special case: the upper boundary was not defined 807: # and needs to be set to the value where 808: # the condition is not true anymore => set flag 809: 810: my $findupper=0; 811: if (($xfinal eq '') 812: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 813: && ($xfinallabel)) { 814: $findupper=1; 815: } 816: 817: # if a hard value is set for the boundaries, it overrides the label 818: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 819: $li=&array_index($xmin,$xmax,$xinitial); 820: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 821: } 822: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 823: $lh=&array_index($xmin,$xmax,$xfinal); 824: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 825: } 826: # if the label is defined, use it 827: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 828: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 829: } else { 830: $li=&array_index($xmin,$xmax,$xinitial); 831: } 832: unless ($findupper) { 833: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 834: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 835: } else { 836: $lh=&array_index($xmin,$xmax,$xfinal); 837: } 838: } 839: # Basic sanity checks 840: if ($li<0) { $li=0; } 841: if ($lh>400) { $lh=400; } 842: if ($li>$lh) { 843: $lh=$li; 844: } 845: 846: # &Apache::lonnet::logthis("Init $xinitial=$li Final $xfinal=$lh Findupper: $findupper"); 847: my $tol=$percent*($ymax-$ymin)/100; 848: if ($xmax>$xmin) { 849: if ($derivative==2) { 850: $tol=4.*$tol/($xmax-$xmin); 851: } elsif ($derivative==1) { 852: $tol=2.*$tol/($xmax-$xmin); 853: } 854: } 855: for (my $i=$li; $i<=$lh; $i++) { 856: my $val; 857: if ($derivative==2) { 858: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 859: } elsif ($derivative==1) { 860: $val=$Apache::functionplotresponse::dfuncdx[$i]; 861: } else { 862: $val=$Apache::functionplotresponse::func[$i]; 863: } 864: unless (&compare_rel($relationship,$value,$val,$tol)) { 865: # &Apache::lonnet::logthis("Condition false $findupper at $i with $val tol:$tol from $value"); 866: if (($findupper) && ($i>$li)) { 867: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 868: # &Apache::lonnet::logthis("Setting $xfinallabel to $i"); 869: return 1; 870: } else { 871: return 0; 872: } 873: } 874: } 875: return 1; 876: } 877: 878: sub end_functionplotresponse { 879: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 880: &Apache::response::end_response; 881: 882: my $result; 883: my $id=$Apache::inputtags::response[-1]; 884: my $partid=$Apache::inputtags::part; 885: my $internalid = $partid.'_'.$id; 886: 887: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 888: if ($target eq 'grade' 889: && &Apache::response::submitted() 890: && $Apache::lonhomework::type eq 'exam') { 891: 892: &Apache::response::scored_response($partid,$id); 893: 894: } elsif ($target eq 'grade' 895: && &Apache::response::submitted() 896: && $Apache::lonhomework::type ne 'exam') { 897: my ($response,%coords)=&get_answer_from_form_fields($internalid); 898: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 899: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 900: # 901: # Actually grade 902: # 903: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval); 904: $xmin=(defined($xmin)?$xmin:-10); 905: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval); 906: $xmax=(defined($xmax)?$xmax:10); 907: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval); 908: $ymin=(defined($ymin)?$ymin:-10); 909: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); 910: $ymax=(defined($ymax)?$ymax:10); 911: 912: my $ad=''; 913: undef %Apache::functionplotresponse::functionplotrulelabels; 914: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 915: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 916: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') { 917: $ad='NOT_FUNCTION'; 918: } else { 919: # We have a function that we can actually grade, go through the spline rules. 920: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 921: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) { 922: $ad='INCORRECT'; 923: last; 924: } 925: } 926: # If it's not wrong, it's correct 927: unless ($ad) { $ad='EXACT_ANS' }; 928: } 929: 930: # 931: # Store grading info 932: # 933: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 934: &Apache::response::handle_previous(\%previous,$ad); 935: } elsif ($target eq 'web') { 936: # Now is the time to render all of the stored splines 937: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 938: $result.=&generate_spline($internalid,$label); 939: } 940: # close the init script 941: $result.=&end_init_script(); 942: # register all splines in this response 943: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 944: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 945: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 946: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 947: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 948: } 949: # generate the input fields 950: $result.=$Apache::functionplotresponse::inputfields; 951: # actually start the <applet>-tag 952: $result.=&geogebra_startcode($internalid); 953: # load the spline bytecode 954: $result.=&geogebra_spline_program(); 955: # set default parameters 956: $result.=&geogebra_default_parameters($internalid); 957: # close the <applet>-tag 958: $result.=&geogebra_endcode(); 959: } 960: return $result; 961: } 962: 963: 1; 964: 965: __END__ 966: 967: =head1 NAME 968: 969: Apache::functionplotresponse.pm; 970: 971: =head1 SYNOPSIS 972: 973: Handles tags associated with accepting function plots. 974: 975: This is part of the LearningOnline Network with CAPA project 976: described at http://www.lon-capa.org. 977: 978: =head1 HANDLER SUBROUTINE 979: 980: start_functionplotresponse() 981: 982: =head1 OTHER SUBROUTINES 983: 984: =over 985: 986: =item end_functionplotresponse() 987: 988: =back 989: 990: =cut