loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
Revision 1.65: download - view: text, annotated - select for diffs
Thu Oct 13 01:54:12 2011 UTC (12 years, 7 months ago) by www
Branches: MAIN
CVS tags: HEAD

Values in functionplotresponse rules can be evaluated

1: # LearningOnline Network with CAPA 2: # option list style responses 3: # 4: # $Id: functionplotresponse.pm,v 1.65 2011/10/13 01:54:12 www Exp $ 5: # 6: # Copyright Michigan State University Board of Trustees 7: # 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 9: # 10: # LON-CAPA is free software; you can redistribute it and/or modify 11: # it under the terms of the GNU General Public License as published by 12: # the Free Software Foundation; either version 2 of the License, or 13: # (at your option) any later version. 14: # 15: # LON-CAPA is distributed in the hope that it will be useful, 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18: # GNU General Public License for more details. 19: # 20: # You should have received a copy of the GNU General Public License 21: # along with LON-CAPA; if not, write to the Free Software 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23: # 24: # /home/httpd/html/adm/gpl.txt 25: # 26: # http://www.lon-capa.org/ 27: # 28: 29: package Apache::functionplotresponse; 30: use strict; 31: use Apache::response(); 32: use Apache::lonlocal; 33: use Apache::lonnet; 34: use Apache::run; 35: 36: BEGIN { 37: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline', 38: 'functionplotrule','functionplotruleset', 39: 'functionplotelements')); 40: } 41: 42: # 43: # There can be a number of applets on a page, each called ggbApplet_$id, 44: # where $id is the "_"-concatenated part and responseid 45: # 46: 47: sub geogebra_startcode { 48: my ($id)=@_; 49: return (<<ENDSTARTCODE); 50: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar" 51: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT> 52: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/> 53: ENDSTARTCODE 54: } 55: 56: sub geogebra_endcode { 57: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n"; 58: } 59: 60: # 61: # This is the internal GeoGebra bytecode which defines the spline functions 62: # 63: sub geogebra_spline_program { 64: return (<<ENDSPLINEPROGRAM); 65: <param name="ggbBase64" value="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66: ENDSPLINEPROGRAM 67: } 68: 69: # 70: # The standard set of parameters inside <applet> 71: # 72: sub geogebra_default_parameters { 73: my ($id)=@_; 74: return(<<ENDDEFAULTPARAMETERS); 75: <param name="image" value="/adm/lonIcons/lonanim.gif" /> 76: <param name="boxborder" value="false" /> 77: <param name="centerimage" value="true" /> 78: <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" /> 79: <param name="cache_version" value="3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0, 3.9.219.0" /> 80: <param name="framePossible" value="false" /> 81: 82: <param name="showResetIcon" value="false" /> 83: <param name="showAnimationButton" value="false" /> 84: <param name="enableRightClick" value="false" /> 85: <param name="errorDialogsActive" value="true" /> 86: <param name="enableLabelDrags" value="false" /> 87: <param name="showMenuBar" value="false" /> 88: <param name="showToolBar" value="false" /> 89: <param name="showToolBarHelp" value="false" /> 90: <param name="showAlgebraInput" value="false" /> 91: <param name="enableShiftDragZoom" value="false" /> 92: <param name="allowRescaling" value="false" /> 93: <param name="enableLabelDrags" value="false" /> 94: <param name="ggbOnInitParam" value="applet_$id" /> 95: ENDDEFAULTPARAMETERS 96: } 97: 98: # 99: # This subroutine is called by LON-CAPA at </problem> 100: # Each applet on the page will call function ggbOnInit when it is done loading 101: # This function in turn will call the respective function registered by start_init_script 102: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit 103: # 104: 105: sub init_script { 106: if ($#Apache::functionplotresponse::callscripts>=0) { 107: my $script=''; 108: foreach my $id (@Apache::functionplotresponse::callscripts) { 109: $script.="if (param=='applet_$id') { loaded_$id=true; }\n"; 110: } 111: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)). 112: ") { setTimeout('ggbInitAll()',200) }"; 113: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts)); 114: return (<<ENDGGBINIT); 115: <script type="text/javascript"> 116: // <![CDATA[ 117: // Function that each applet will call when loaded 118: // It will pass "its" parameter 119: // Set flags for when an applet is loaded, wait till all are loaded, and then some 120: function ggbOnInit(param) { 121: $script 122: } 123: function ggbInitAll() { 124: $calls 125: } 126: // ]]> 127: </script> 128: ENDGGBINIT 129: } 130: } 131: 132: # 133: # Each Geogebra applet is supposed to call this when parameters change 134: # Changes the hidden fields on the web page 135: # 136: sub update_script { 137: my ($id)=@_; 138: return (<<ENDUPDATESCRIPT); 139: <script type="text/javascript"> 140: // <![CDATA[ 141: function updatePointCoordinates_$id(coordinateName) { 142: var x = document.ggbApplet_$id.getXcoord(coordinateName); 143: var y = document.ggbApplet_$id.getYcoord(coordinateName); 144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x; 145: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y; 146: } 147: // ]]> 148: </script> 149: ENDUPDATESCRIPT 150: } 151: 152: # 153: # Register the above update-handler for a variable 154: # 155: 156: sub update_register { 157: my ($id,$variable)=@_; 158: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n"; 159: } 160: 161: # 162: # Set a point coordinate variable 163: # 164: sub set_point_coordinate { 165: my ($id,$variable,$x,$y,$fixed)=@_; 166: my $mult=($fixed?'a*':''); 167: return (<<ENDSETVARIABLE); 168: document.ggbApplet_$id.evalCommand("a=1"); 169: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)"); 170: document.ggbApplet_$id.setLabelVisible("$variable",false); 171: ENDSETVARIABLE 172: } 173: 174: # 175: # Set a slope coordinate variable 176: # 177: sub set_slope_coordinate { 178: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_; 179: my $xvariable=$variable.'x'; 180: my $yvariable=$variable.'y'; 181: my $domain=$xmax-$xmin; 182: my $range=$ymax-$ymin; 183: my $xinterval=$domain/100.; 184: my $yinterval=$range/200.; 185: my $mult=($fixed?'a*':''); 186: return (<<ENDSETSVARIABLE); 187: document.ggbApplet_$id.evalCommand("a=1"); 188: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]"); 189: document.ggbApplet_$id.setVisible("$xvariable", false); 190: document.ggbApplet_$id.evalCommand("$xvariable=$xrel"); 191: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]"); 192: document.ggbApplet_$id.setVisible("$yvariable", false); 193: document.ggbApplet_$id.evalCommand("$yvariable=$yrel"); 194: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))"); 195: document.ggbApplet_$id.setLabelVisible("$variable", false); 196: ENDSETSVARIABLE 197: } 198: 199: # 200: # Input field name for a coordinate variable 201: # 202: 203: sub field_name { 204: my ($id,$variable,$name)=@_; 205: return "HWVAL_$id\_$variable\_$name"; 206: } 207: 208: # 209: # Generate an input field for a coordinate variable 210: # 211: 212: sub generate_input_field { 213: my ($id,$variable,$x,$y)=@_; 214: $Apache::functionplotresponse::inputfields.= 215: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 216: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 217: } 218: 219: # 220: # Initialize a new point coordinate variable at set a listener on it 221: # 222: sub new_point_coordinate { 223: my ($id,$variable,$x,$y,$fixed)=@_; 224: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 225: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 226: } 227: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 228: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 229: } 230: &generate_input_field($id,$variable,$x,$y); 231: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable); 232: } 233: 234: # 235: # Initialize a new slope coordinate variable at set a listener on it 236: # 237: sub new_slope_coordinate { 238: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 239: # 240: # $variable: name of the slope point 241: # $x, $y: coordinates of the slope point 242: # $pointname: name of the associated point point 243: # $xp $yp: coordinates of the point point 244: # 245: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 246: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 247: } 248: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 249: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 250: } 251: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) { 252: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')}; 253: } 254: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) { 255: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')}; 256: } 257: 258: &generate_input_field($id,$variable,$x,$y); 259: my $xrel=$x-$xp; 260: my $yrel=$y-$yp; 261: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable); 262: } 263: 264: # 265: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 266: # It then starts the right headers 267: # 268: sub start_init_script { 269: my ($id)=@_; 270: # Add id to the list of ggbInit_$id functions that need to be called 271: push(@Apache::functionplotresponse::callscripts,$id); 272: # ... and open this function 273: return (<<ENDSTARTINIT); 274: <script type="text/javascript"> 275: // <![CDATA[ 276: // variable that will eventually be passed back to the server 277: var coordinateMap_$id = []; 278: // flag for not loaded yet 279: var loaded_$id=false; 280: // Init-function for applet 281: function ggbInit_$id() { 282: ENDSTARTINIT 283: } 284: 285: # 286: # This sets the axes inside ggbInit_$id 287: # 288: 289: sub axes_script { 290: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 291: return (<<ENDAXESSCRIPT); 292: // changes (xmin, xmax, ymin, ymax) 293: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 294: 295: // makes the (x,y) axis (in)visible 296: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 297: // makes the grid (in)visible 298: document.ggbApplet_$id.setGridVisible($gvisible); 299: ENDAXESSCRIPT 300: } 301: 302: sub axes_label { 303: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_; 304: unless ($xlabel || $ylabel) { return ''; } 305: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 306: if ($xlabel) { 307: if (($ymin<0) && ($ymax>0)) { 308: $return.=(<<ENDXAXISLABELSCRIPT); 309: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 310: document.ggbApplet_$id.setVisible("Xlabel",false); 311: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 312: ENDXAXISLABELSCRIPT 313: } else { 314: $return.=(<<ENDXOFFAXISLABEL); 315: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]"); 316: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]"); 317: ENDXOFFAXISLABEL 318: } 319: } 320: if ($ylabel) { 321: if (($xmin<0) && ($xmax>0)) { 322: $return.=(<<ENDYAXISLABELSCRIPT); 323: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 324: document.ggbApplet_$id.setVisible("Ylabel",false); 325: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 326: ENDYAXISLABELSCRIPT 327: } else { 328: $return.=(<<ENDYOFFAXISLABEL); 329: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]"); 330: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]"); 331: ENDYOFFAXISLABEL 332: } 333: } 334: return $return; 335: } 336: 337: # 338: # Subroutine to produce background and answer plots 339: # 340: 341: sub plot_script { 342: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_; 343: $label=~s/\W//g; 344: if (($label) && ($label!~/^[A-Za-z]/)) { 345: $label='C'.$label; 346: } 347: my $visible=0; 348: if ($label) { 349: $visible="1"; 350: } else { 351: $Apache::functionplotresponse::counter++; 352: $label='C'.$Apache::functionplotresponse::counter; 353: } 354: my $rc=0; 355: my $gc=0; 356: my $bc=0; 357: if ($color) { 358: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/); 359: $rc=hex($rh); 360: $gc=hex($gh); 361: $bc=hex($bh); 362: } 363: if ($fixed) { 364: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n". 365: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n"). 366: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":''). 367: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":''); 368: } else { 369: return "document.ggbApplet_$id.evalCommand('y=$function');\n"; 370: } 371: } 372: 373: # 374: # Answer spline display 375: # 376: # points: x,y,slope_x,slope_y 377: 378: sub answer_spline_script { 379: my ($id,@points)=@_; 380: my $order=int(($#points+1)/4); 381: if ($order<2) { $order=2; } 382: if ($order>8) { $order=8; } 383: $Apache::functionplotresponse::counter++; 384: my $label='CSpline'.$Apache::functionplotresponse::counter; 385: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'['; 386: for (my $i=0;$i<=$#points;$i+=4) { 387: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),"; 388: } 389: $output=~s/\,$//; 390: $output.=']");'."\n"; 391: for (my $i=2; $i<2*$order; $i+=2) { 392: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n"; 393: } 394: for (my $i=1; $i<2*$order; $i+=2) { 395: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n"; 396: } 397: 398: return $output; 399: } 400: 401: # 402: # Subroutine that generates code for spline $label based on stored information 403: # 404: 405: sub generate_spline { 406: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 407: my $result=''; 408: my $order=$Apache::functionplotresponse::splineorder{$label}; 409: my $x=$Apache::functionplotresponse::splineinitx{$label}; 410: my $y=$Apache::functionplotresponse::splineinity{$label}; 411: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 412: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 413: my @coords=(); 414: foreach my $i (1..$order) { 415: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed); 416: my $xp=$x; 417: $x+=$sx/(2.*($order-1)); 418: push(@coords,$label.'P'.$i); 419: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed); 420: $x+=$sx/(2.*($order-1)); 421: push(@coords,$label.'S'.$i); 422: } 423: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 424: return $result; 425: } 426: # 427: # <backgroundplot function="..." fixed="yes/no" /> 428: # 429: sub start_backgroundplot { 430: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 431: my $result=''; 432: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 433: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 434: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval); 435: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval); 436: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 437: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval); 438: $color=~s/[^a-fA-F0-9]//gs; 439: unless (length($color)==6) { $color=''; } 440: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 441: 442: unless ($function) { $function="0"; } 443: if ($target eq 'web') { 444: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 445: unless (defined($xinitial)) { $xinitial=$xmin; } 446: unless (defined($xfinal)) { $xfinal=$xmax; } 447: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal); 448: } elsif ($target eq 'edit') { 449: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 450: &Apache::edit::text_arg('Function:','function', 451: $token,'16'). 452: &Apache::edit::text_arg('Initial x-value (optional):','xinitial', 453: $token,'8'). 454: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 455: $token,'8'). 456: &Apache::edit::text_arg('Label on Plot:','label', 457: $token,'8'). 458: &Apache::edit::text_arg('Color (hex code):','color', 459: $token,'8'). 460: &Apache::edit::select_arg('Fixed location:','fixed', 461: ['yes','no'],$token). 462: &Apache::edit::end_row(); 463: } elsif ($target eq 'modified') { 464: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 465: $safeeval,'function','label','xinitial','xfinal','color','fixed'); 466: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 467: } 468: return $result; 469: } 470: 471: sub end_backgroundplot { 472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 473: my $result=''; 474: if ($target eq 'edit') { 475: $result=&Apache::edit::end_table(); 476: } 477: return $result; 478: } 479: 480: # 481: # <functionplotrule ... /> 482: # 483: sub start_functionplotrule { 484: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 485: my $result=''; 486: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 487: $Apache::functionplotresponse::counter++; 488: if ($label=~/\W/) { 489: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 490: } 491: $label=~s/\W//gs; 492: unless ($label) { 493: $label='R'.$Apache::functionplotresponse::counter; 494: } else { 495: $label='R'.$label; 496: } 497: if ($Apache::functionplotresponse::splineorder{$label}) { 498: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 499: } 500: 501: 502: if ($target eq 'grade') { 503: # Simply remember - in order - for later 504: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 505: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 506: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 507: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 508: } 509: $beginninglabel=~s/\W//gs; 510: $endinglabel=~s/\W//gs; 511: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 512: $relationship=~s/\W//gs; 513: $relationship=lc($relationship); 514: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 515: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 516: $relationship='eq'; 517: } 518: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 519: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) { 520: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 521: $derivative=0; 522: } 523: push(@Apache::functionplotresponse::functionplotrules,join(':',( 524: $label, 525: $derivative, 526: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 527: $beginninglabel, 528: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 529: $endinglabel, 530: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 531: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 532: $relationship, 533: &Apache::lonxml::get_param('value',$parstack,$safeeval), 534: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 535: ))); 536: } elsif ($target eq 'edit') { 537: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule'). 538: &Apache::edit::text_arg('Index/Name:','index', 539: $token,'10').' '. 540: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 541: [['0','Function itself'], 542: ['1','First derivative'], 543: ['2','Second derivative'], 544: ['-1','Integral']],$token).'<br />'. 545: &Apache::edit::text_arg('Initial x-value:','xinitial', 546: $token,'8'). 547: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel', 548: [['start','Start of Plot'], 549: ['end','End of Plot']],$token,'8').'<br />'. 550: 551: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 552: $token,'8'). 553: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel', 554: [['end','End of Plot']],$token,'8').'<br />'. 555: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength', 556: $token,'8'). 557: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength', 558: $token,'8').'<br />'. 559: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship', 560: [['eq','equal'], 561: ['ne','not equal'], 562: ['ge','greater than or equal'], 563: ['gt','greater than'], 564: ['lt','less than'], 565: ['le','less than or equal']],$token). 566: $result.= &Apache::edit::select_or_text_arg('Value:','value', 567: [['undef','not defined']],$token,'30'). 568: &Apache::edit::text_arg('Percent error:','percenterror', 569: $token,'8'). 570: &Apache::edit::end_row(); 571: } elsif ($target eq 'modified') { 572: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) { 573: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}=''; 574: } 575: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) { 576: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}=''; 577: } 578: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 579: $safeeval,'index','derivativeorder', 580: 'xinitial','xinitiallabel','xfinal','xfinallabel', 581: 'minimumlength','maximumlength', 582: 'relationship','value','percenterror'); 583: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 584: } 585: return $result; 586: } 587: 588: sub end_functionplotrule { 589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 590: my $result=''; 591: if ($target eq 'edit') { 592: $result=&Apache::edit::end_table(); 593: } 594: return $result; 595: } 596: 597: 598: # 599: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 600: # 601: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 602: # 603: sub start_spline { 604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 605: my $result=''; 606: if ($target eq 'web') { 607: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 608: $Apache::functionplotresponse::counter++; 609: if ($label=~/\W/) { 610: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 611: } 612: $label=~s/\W//gs; 613: unless ($label) { 614: $label='S'.$Apache::functionplotresponse::counter; 615: } else { 616: $label='S'.$label; 617: } 618: if ($Apache::functionplotresponse::splineorder{$label}) { 619: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 620: } 621: 622: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 623: if ($order<2) { $order=2; } 624: if ($order>8) { $order=8; } 625: $Apache::functionplotresponse::splineorder{$label}=$order; 626: 627: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 628: unless ($x) { $x=0; } 629: $Apache::functionplotresponse::splineinitx{$label}=$x; 630: 631: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 632: unless ($y) { $y=0; } 633: $Apache::functionplotresponse::splineinity{$label}=$y; 634: 635: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 636: unless ($sx) { $sx=$order; } 637: $Apache::functionplotresponse::splinescalex{$label}=$sx; 638: 639: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 640: unless ($sy) { $sy=2; } 641: $Apache::functionplotresponse::splinescaley{$label}=$sy; 642: } elsif ($target eq 'edit') { 643: $result=&Apache::edit::tag_start($target,$token,'Spline'). 644: &Apache::edit::text_arg('Index:','index', 645: $token,'4').' '. 646: &Apache::edit::select_arg('Order:','order', 647: ['2','3','4','5','6','7','8'],$token).' '. 648: &Apache::edit::text_arg('Initial x-value:','initx', 649: $token,'4').' '. 650: &Apache::edit::text_arg('Initial y-value:','inity', 651: $token,'4').' '. 652: &Apache::edit::text_arg('Scale x:','scalex', 653: $token,'4').' '. 654: &Apache::edit::text_arg('Scale y:','scaley', 655: $token,'4'). 656: &Apache::edit::end_row(); 657: } elsif ($target eq 'modified') { 658: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 659: $safeeval,'index','order','initx','inity', 660: 'scalex','scaley'); 661: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 662: } 663: return $result; 664: } 665: 666: sub end_spline { 667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 668: my $result=''; 669: if ($target eq 'edit') { 670: $result=&Apache::edit::end_table(); 671: } 672: return $result; 673: } 674: 675: sub end_init_script { 676: return (<<ENDENDINIT); 677: } 678: // ]]> 679: </script> 680: ENDENDINIT 681: } 682: 683: # 684: # Storing and restoring spline coordinates from part answers 685: # 686: sub decode_previous_answer { 687: my ($answer)=@_; 688: foreach my $coordinate (split(/\,/,$answer)) { 689: my ($key,$value)=split(/\=/,$coordinate); 690: $Apache::functionplotresponse::previous{$key}=$value; 691: } 692: } 693: 694: sub get_answer_from_form_fields { 695: my ($id)=@_; 696: my $answer=''; 697: my %coords=(); 698: foreach my $field (keys(%env)) { 699: if ($field=~/^form\.HWVAL\_$id/) { 700: $field=~/^form\.(.*)$/; 701: $coords{$1}=$env{$field}; 702: } 703: } 704: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 705: return ($answer,%coords); 706: } 707: 708: # 709: # The following functions calculate the cubic-hermite splines server-side 710: # 711: 712: sub cubic_hermite { 713: my ($t,$p1,$s1,$p2,$s2)=@_; 714: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 715: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2); 716: } 717: 718: # 719: # d/dt(...) 720: # 721: 722: sub ddt_cubic_hermite { 723: my ($t,$p1,$s1,$p2,$s2)=@_; 724: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 725: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2); 726: } 727: 728: # 729: # d^2/dt^2(...) 730: # 731: 732: sub d2dt2_cubic_hermite { 733: my ($t,$p1,$s1,$p2,$s2)=@_; 734: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+ 735: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2); 736: } 737: 738: # 739: # Array index calculation 740: # 741: sub array_index { 742: my ($xmin,$xmax,$x)=@_; 743: if ($x ne '') { 744: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 745: } else { 746: return undef; 747: } 748: } 749: 750: # 751: # Populate the arrays 752: # 753: 754: sub populate_arrays { 755: my ($id,$xmin,$xmax,$ymin,$ymax)=@_; 756: for (my $i=0; $i<=400; $i++) { 757: $Apache::functionplotresponse::actualxval[$i]=undef; 758: $Apache::functionplotresponse::func[$i]=undef; 759: $Apache::functionplotresponse::dfuncdx[$i]=undef; 760: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 761: } 762: unless ($xmax>$xmin) { return 'no_func'; } 763: # Run over all splines in response 764: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 765: my $xiold=-1; 766: # Run over all points in spline 767: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 768: my $ni=$i+1; 769: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 770: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 771: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 772: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 773: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 774: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 775: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 776: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 777: # Run in small steps over spline parameter 778: for (my $t=0; $t<=1; $t+=0.0001) { 779: my $xreal=&cubic_hermite($t,@xparms); 780: my $xi=&array_index($xmin,$xmax,$xreal); 781: if ($xi<$xiold) { return 'no_func'; } 782: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 783: $xiold=$xi; 784: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 785: # Function value 786: my $funcval=&cubic_hermite($t,@yparms); 787: 788: # Do we already have a value for this point, and is it different from the new one? 789: if ((defined($Apache::functionplotresponse::func[$xi])) && 790: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) { 791: return 'no_func'; 792: } 793: # Okay, remember the new point 794: $Apache::functionplotresponse::func[$xi]=$funcval; 795: 796: if (defined($funcval)) { 797: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 798: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 799: } 800: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 801: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 802: } 803: } 804: # Chain rule 805: # dy/dx=dy/dt/(dx/dt) 806: my $dxdt=&ddt_cubic_hermite($t,@xparms); 807: if ($dxdt) { 808: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 809: # Second derivative 810: $Apache::functionplotresponse::d2funcdx2[$xi]= 811: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 812: ($dxdt*$dxdt*$dxdt); 813: } 814: } 815: } 816: } 817: } 818: } 819: 820: # 821: # Implementation of <functionplotresponse> 822: # 823: 824: sub start_functionplotresponse { 825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 826: my $result=''; 827: # To remember the splines - somehow, they need to come last 828: undef %Apache::functionplotresponse::splineorder; 829: undef %Apache::functionplotresponse::splineinitx; 830: undef %Apache::functionplotresponse::splineinity; 831: undef %Apache::functionplotresponse::splinescalex; 832: undef %Apache::functionplotresponse::splinescaley; 833: # Remember input fields, etc 834: undef %Apache::functionplotresponse::previous; 835: $Apache::functionplotresponse::inputfields=''; 836: $Apache::functionplotresponse::counter=0; 837: # Remember rules 838: undef @Apache::functionplotresponse::functionplotrules; 839: # Remember failed rules 840: if ($target eq 'grade') { 841: undef @Apache::functionplotresponse::failedrules; 842: } 843: # Delete previous awards 844: undef $Apache::functionplotresponse::awarddetail; 845: # Part and ID 846: my $partid=$Apache::inputtags::part; 847: my $id=&Apache::response::start_response($parstack,$safeeval); 848: # Internal ID to mark the applet and its coordinates 849: my $internalid = $partid.'_'.$id; 850: # Previous answer 851: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 852: 853: # Parameters of <functionplotresponse> 854: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval); 855: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 856: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 857: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 858: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 859: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 860: if ($target eq 'edit') { 861: $result.=&Apache::edit::start_table($token) 862: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 863: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 864: .&Apache::edit::deletelist($target,$token).'   ' 865: .&Apache::edit::insertlist($target,$token).'   ' 866: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses') 867: .'</span></td>' 868: ."<td> " 869: .&Apache::edit::end_row() 870: .&Apache::edit::start_spanning_row() 871: ."\n"; 872: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 873: $token,'6').' '. 874: &Apache::edit::text_arg('Minimum x-value:','xmin', 875: $token,'4').' '. 876: &Apache::edit::text_arg('Maximum x-value:','xmax', 877: $token,'4').' '. 878: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 879: ['yes','no'],$token).'<br />'. 880: &Apache::edit::text_arg('Label y-axis:','ylabel', 881: $token,'6').' '. 882: &Apache::edit::text_arg('Minimum y-value:','ymin', 883: $token,'4').' '. 884: &Apache::edit::text_arg('Maximum y-value:','ymax', 885: $token,'4').' '. 886: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 887: ['yes','no'],$token).'<br />'. 888: &Apache::edit::select_arg('Grid visible:','gridvisible', 889: ['yes','no'],$token).'<br />'. 890: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):', 891: 'answerdisplay',$token,'50'). 892: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 893: } elsif ($target eq 'modified') { 894: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 895: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 896: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay'); 897: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 898: 899: } elsif ($target eq 'meta') { 900: $result=&Apache::response::meta_package_write('functionplotresponse'); 901: } elsif (($target eq 'answer') && 902: ($env{'form.answer_output_mode'} ne 'tex') && 903: ($Apache::lonhomework::viewgrades == 'F')) { 904: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 905: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen(); 906: my $start_page = &Apache::loncommon::start_page('Rules Log', undef, 907: {'only_body' => 1, 908: 'bgcolor' => '#FFFFFF', 909: 'js_ready' => 1,}); 910: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,}); 911: $uname =~s/\W//g; 912: $udom =~s/\W//g; 913: my $function_name = 914: join('_','LONCAPA_scriptvars',$uname,$udom, 915: $env{'form.counter'},$Apache::lonxml::curdepth); 916: my $rules_var ="<script type=\"text/javascript\"> 917: // <![CDATA[ 918: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>". 919: $Apache::functionplotresponse::ruleslog. 920: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()} 921: // ]]> 922: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />"; 923: &Apache::lonxml::add_script_result($rules_var); 924: } 925: 926: return $result; 927: } 928: 929: sub compare_rel { 930: my ($relationship,$value,$realval,$tol)=@_; 931: # is the real value undefined? 932: unless (defined($realval)) { 933: # the real value is not defined 934: if ($relationship eq 'eq') { 935: if ($value eq 'undef') { 936: return 1; 937: } else { 938: return 0; 939: } 940: } elsif ($relationship eq 'ne') { 941: if ($value eq 'undef') { 942: return 0; 943: } else { 944: return 1; 945: } 946: } else { 947: return 0; 948: } 949: } 950: 951: # is the expected value undefined? 952: if ($value eq 'undef') { 953: # but by now we know that the real value is defined 954: return 0; 955: } 956: 957: # both are defined. 958: if ($relationship eq 'gt') { 959: return ($realval>$value); 960: } elsif ($relationship eq 'ge') { 961: return ($realval>$value-$tol); 962: } elsif ($relationship eq 'lt') { 963: return ($realval<$value); 964: } elsif ($relationship eq 'le') { 965: return ($realval<$value+$tol); 966: } elsif ($relationship eq 'ne') { 967: return (abs($value-$realval)>$tol); 968: } else { 969: return (abs($value-$realval)<$tol); 970: } 971: return 0; 972: } 973: 974: sub addlog { 975: my ($text)=@_; 976: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 977: } 978: 979: sub actualval { 980: my ($i,$xmin,$xmax)=@_; 981: return $xmin+$i/400.*($xmax-$xmin); 982: } 983: 984: sub fpr_f { 985: my ($arg)=@_; 986: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin, 987: $Apache::functionplotresponse::fpr_xmax, 988: $arg)]; 989: } 990: 991: sub fpr_dfdx { 992: my ($arg)=@_; 993: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin, 994: $Apache::functionplotresponse::fpr_xmax, 995: $arg)]; 996: } 997: 998: sub fpr_d2fdx2 { 999: my ($arg)=@_; 1000: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin, 1001: $Apache::functionplotresponse::fpr_xmax, 1002: $arg)]; 1003: } 1004: 1005: sub functionplotrulecheck { 1006: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1007: 1008: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 1009: =split(/\:/,$rule); 1010: $percent=($percent>0?$percent:5); 1011: &addlog("================="); 1012: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value"); 1013: # 1014: # Evaluate the value 1015: # 1016: if ($value=~/\D/) { 1017: $Apache::functionplotresponse::fpr_xmin=$xmin; 1018: $Apache::functionplotresponse::fpr_xmax=$xmax; 1019: $value=&Apache::run::run($value,$safeeval); 1020: &addlog("Value evaluated to $value"); 1021: } 1022: 1023: # 1024: # Minimum and maximum lengths of the interval 1025: # 1026: if ((defined($minimumlength)) || (defined($maximumlength))) { 1027: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength"); 1028: } 1029: my $li=0; 1030: my $lh=400; 1031: 1032: # Special case: the upper boundary was not defined 1033: # and needs to be set to the value where 1034: # the condition is not true anymore => set flag 1035: 1036: my $findupper=0; 1037: if (($xfinal eq '') 1038: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 1039: && ($xfinallabel)) { 1040: $findupper=1; 1041: } 1042: 1043: # if a hard value is set for the boundaries, it overrides the label 1044: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 1045: $li=&array_index($xmin,$xmax,$xinitial); 1046: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 1047: } 1048: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 1049: $lh=&array_index($xmin,$xmax,$xfinal); 1050: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 1051: } 1052: # if the label is defined, use it 1053: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 1054: &addlog("Using lower label $xinitiallabel"); 1055: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 1056: } else { 1057: $li=&array_index($xmin,$xmax,$xinitial); 1058: } 1059: unless ($findupper) { 1060: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 1061: &addlog("Using upper label $xfinallabel"); 1062: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 1063: } else { 1064: $lh=&array_index($xmin,$xmax,$xfinal); 1065: } 1066: } 1067: # Basic sanity checks 1068: if ($li<0) { $li=0; } 1069: if ($lh>400) { $lh=400; } 1070: if (($li>$lh) || (!defined($lh))) { 1071: $lh=$li; 1072: } 1073: 1074: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 1075: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 1076: if ($findupper) { 1077: &addlog("Looking for label $xfinallabel"); 1078: } 1079: my $tol=$percent*($ymax-$ymin)/100; 1080: if ($xmax>$xmin) { 1081: if ($derivative==2) { 1082: $tol=4.*$tol/($xmax-$xmin); 1083: } elsif ($derivative==1) { 1084: $tol=2.*$tol/($xmax-$xmin); 1085: } elsif ($derivative==-1) { 1086: $tol=$tol*($xmax-$xmin)/2.; 1087: } 1088: } 1089: my $integral=0; 1090: my $binwidth=($xmax-$xmin)/400.; 1091: if (($derivative<0) && (!$findupper)) { 1092: # definite integral, calculate over whole length 1093: &addlog("Calculating definite integral"); 1094: for (my $i=$li; $i<=$lh; $i++) { 1095: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1096: } 1097: unless (&compare_rel($relationship,$value,$integral,$tol)) { 1098: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol"); 1099: &addlog("Rule $label failed."); 1100: my $hintlabel=$label; 1101: $hintlabel=~s/^R//; 1102: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1103: &addlog("Set hint condition $hintlabel"); 1104: return 0; 1105: } 1106: } else { 1107: for (my $i=$li; $i<=$lh; $i++) { 1108: my $val; 1109: if ($derivative==2) { 1110: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 1111: } elsif ($derivative==1) { 1112: $val=$Apache::functionplotresponse::dfuncdx[$i]; 1113: } elsif ($derivative==-1) { 1114: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1115: $val=$integral; 1116: } else { 1117: $val=$Apache::functionplotresponse::func[$i]; 1118: } 1119: unless (&compare_rel($relationship,$value,$val,$tol)) { 1120: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 1121: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 1122: if (($findupper) && ($i>$li)) { 1123: # Check lengths 1124: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1125: # Successfully found a new label, set it 1126: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 1127: &addlog("Rule $label passed, setting label $xfinallabel"); 1128: return 1; 1129: } else { 1130: &addlog("Rule $label failed."); 1131: &setfailed($label); 1132: return 0; 1133: } 1134: } 1135: } 1136: } 1137: # Corner case where this makes sense: using start or stop as defined labels 1138: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1139: &addlog("Rule $label passed."); 1140: return 1; 1141: } 1142: 1143: # 1144: # check for minimum and maximum lengths 1145: # 1146: 1147: sub checklength { 1148: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_; 1149: unless (($minimumlength) || ($maximumlength)) { return 1; } 1150: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 1151: if ($minimumlength) { 1152: if ($length<$minimumlength) { 1153: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 1154: &setfailed($label); 1155: return 0; 1156: } 1157: } 1158: if ($maximumlength) { 1159: if ($length>$maximumlength) { 1160: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 1161: &setfailed($label); 1162: return 0; 1163: } 1164: } 1165: return 1; 1166: } 1167: 1168: sub setfailed { 1169: my ($label)=@_; 1170: my $hintlabel=$label; 1171: $hintlabel=~s/^R//; 1172: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1173: &addlog("Set hint condition $hintlabel"); 1174: } 1175: 1176: sub start_functionplotruleset { 1177: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1178: if ($target eq 'edit') { 1179: return &Apache::edit::start_table($token). 1180: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 1181: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1182: .&Apache::edit::deletelist($target,$token).'   '. 1183: &Apache::edit::insertlist($target,$token).'   ' 1184: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules') 1185: .'</span></td>' 1186: ."<td> " 1187: .&Apache::edit::end_row() 1188: .&Apache::edit::start_spanning_row() 1189: ."\n"; 1190: } 1191: } 1192: 1193: sub end_functionplotruleset { 1194: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1195: my $id=$Apache::inputtags::response[-1]; 1196: my $partid=$Apache::inputtags::part; 1197: my $internalid = $partid.'_'.$id; 1198: 1199: if ($target eq 'edit' ) { 1200: return &Apache::edit::end_table(); 1201: } elsif ($target eq 'grade' 1202: && &Apache::response::submitted() 1203: && $Apache::lonhomework::type ne 'exam') { 1204: # 1205: # Actually grade 1206: # 1207: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1208: 1209: my $ad=''; 1210: undef %Apache::functionplotresponse::functionplotrulelabels; 1211: $Apache::functionplotresponse::ruleslog=''; 1212: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 1213: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 1214: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') { 1215: $ad='NOT_FUNCTION'; 1216: } else { 1217: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 1218: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 1219: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1220: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1221: 1222: # We have a function that we can actually grade, go through the spline rules. 1223: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1224: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1225: $ad='INCORRECT'; 1226: last; 1227: } 1228: } 1229: # If it's not wrong, it's correct 1230: unless ($ad) { $ad='EXACT_ANS' }; 1231: } 1232: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1233: &addlog("Assigned award detail: $ad"); 1234: # Store for later to be assigned at end_functionplotresponse 1235: $Apache::functionplotresponse::awarddetail=$ad; 1236: } 1237: } 1238: 1239: 1240: sub end_functionplotresponse { 1241: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1242: &Apache::response::end_response; 1243: 1244: my $result; 1245: my $id=$Apache::inputtags::response[-1]; 1246: my $partid=$Apache::inputtags::part; 1247: my $internalid = $partid.'_'.$id; 1248: 1249: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 1250: if ($target eq 'grade' 1251: && &Apache::response::submitted() 1252: && $Apache::lonhomework::type eq 'exam') { 1253: 1254: &Apache::response::scored_response($partid,$id); 1255: 1256: } elsif ($target eq 'grade' 1257: && &Apache::response::submitted() 1258: && $Apache::lonhomework::type ne 'exam') { 1259: my ($response,%coords)=&get_answer_from_form_fields($internalid); 1260: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 1261: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 1262: # 1263: # Assign grade 1264: # 1265: my $ad=$Apache::functionplotresponse::awarddetail; 1266: # 1267: # Store grading info 1268: # 1269: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 1270: &Apache::response::handle_previous(\%previous,$ad); 1271: } elsif ($target eq 'web') { 1272: undef @Apache::functionplotresponse::failedrules; 1273: } 1274: return $result; 1275: } 1276: 1277: sub end_functionplotelements { 1278: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1279: my $result=''; 1280: my $id=$Apache::inputtags::response[-1]; 1281: my $partid=$Apache::inputtags::part; 1282: my $internalid = $partid.'_'.$id; 1283: if ($target eq 'edit' ) { 1284: $result=&Apache::edit::end_table(); 1285: } elsif ($target eq 'web') { 1286: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1287: 1288: # Are we in show answer mode? 1289: my $showanswer=&Apache::response::show_answer(); 1290: if ($showanswer) { 1291: # Render answerdisplay 1292: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2); 1293: if ($answerdisplay=~/\S/s) { 1294: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) { 1295: my @components=split(/\s*\:\s*/,$plot); 1296: if ($#components<3) { 1297: # Just a simple plot 1298: my ($func,$xl,$xh)=@components; 1299: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; } 1300: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; } 1301: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6); 1302: } else { 1303: # This is a spline 1304: $result.=&answer_spline_script($internalid,@components); 1305: } 1306: } 1307: } 1308: } 1309: my $fixed=0; 1310: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; } 1311: # Now is the time to render all of the stored splines 1312: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1313: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed); 1314: } 1315: # close the init script 1316: $result.=&end_init_script(); 1317: # register all splines in this response 1318: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 1319: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 1320: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1321: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 1322: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 1323: } 1324: # generate the input fields 1325: $result.=$Apache::functionplotresponse::inputfields; 1326: # actually start the <applet>-tag 1327: $result.=&geogebra_startcode($internalid); 1328: # load the spline bytecode 1329: $result.=&geogebra_spline_program(); 1330: # set default parameters 1331: $result.=&geogebra_default_parameters($internalid); 1332: # close the <applet>-tag 1333: $result.=&geogebra_endcode(); 1334: } 1335: return $result; 1336: } 1337: 1338: sub boundaries { 1339: my ($parstack,$safeeval,$level)=@_; 1340: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level); 1341: $xmin=(defined($xmin)?$xmin:-10); 1342: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level); 1343: $xmax=(defined($xmax)?$xmax:10); 1344: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level); 1345: $ymin=(defined($ymin)?$ymin:-10); 1346: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level); 1347: $ymax=(defined($ymax)?$ymax:10); 1348: if ($xmax<=$xmin) { 1349: $xmax=$xmin+20; 1350: } 1351: if ($ymax<=$ymin) { 1352: $ymax=$ymin+20; 1353: } 1354: return ($xmin,$xmax,$ymin,$ymax); 1355: } 1356: 1357: sub start_functionplotelements { 1358: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1359: my $result=''; 1360: my $id=$Apache::inputtags::response[-1]; 1361: my $partid=$Apache::inputtags::part; 1362: my $internalid = $partid.'_'.$id; 1363: 1364: if ($target eq 'edit') { 1365: return &Apache::edit::start_table($token). 1366: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 1367: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1368: .&Apache::edit::deletelist($target,$token).'   '. 1369: &Apache::edit::insertlist($target,$token).'   ' 1370: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements') 1371: .'</span></td>' 1372: ."<td> " 1373: .&Apache::edit::end_row() 1374: .&Apache::edit::start_spanning_row() 1375: ."\n"; 1376: } elsif ($target eq 'web') { 1377: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1378: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1379: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1380: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1381: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 1382: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 1383: 1384: 1385: # paste in the update routine to receive stuff back from the applet 1386: $result.=&update_script($internalid); 1387: # start the initscript for this applet 1388: $result.=&start_init_script($internalid); 1389: # put the axis commands inside 1390: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 1391: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel); 1392: # init script is left open 1393: } 1394: return $result; 1395: } 1396: 1397: 1; 1398: 1399: __END__ 1400: 1401: =head1 NAME 1402: 1403: Apache::functionplotresponse.pm; 1404: 1405: =head1 SYNOPSIS 1406: 1407: Handles tags associated with accepting function plots. 1408: 1409: This is part of the LearningOnline Network with CAPA project 1410: described at http://www.lon-capa.org. 1411: 1412: =head1 HANDLER SUBROUTINE 1413: 1414: start_functionplotresponse() 1415: 1416: =head1 OTHER SUBROUTINES 1417: 1418: =over 1419: 1420: =item end_functionplotresponse() 1421: 1422: =back 1423: 1424: =cut