loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
Revision 1.68: download - view: text, annotated - select for diffs
Wed Oct 19 13:21:51 2011 UTC (12 years, 6 months ago) by www
Branches: MAIN
CVS tags: version_2_10_X, version_2_10_1, HEAD

Formatting coordinates involving exponents for GeoGebra

1: # LearningOnline Network with CAPA 2: # option list style responses 3: # 4: # $Id: functionplotresponse.pm,v 1.68 2011/10/19 13:21:51 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: # Get rid of wild exponents, make sure it's a number 168: $x=1.*$x; 169: $y=1.*$y; 170: # GeoGebra does not understand "E" 171: $x=~s/[e|E]/\*10\^/; 172: $x=~s/\+//; 173: $y=~s/[e|E]/\*10\^/; 174: $y=~s/\+//; 175: return (<<ENDSETVARIABLE); 176: document.ggbApplet_$id.evalCommand("a=1"); 177: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)"); 178: document.ggbApplet_$id.setLabelVisible("$variable",false); 179: ENDSETVARIABLE 180: } 181: 182: # 183: # Set a slope coordinate variable 184: # 185: sub set_slope_coordinate { 186: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_; 187: my $xvariable=$variable.'x'; 188: my $yvariable=$variable.'y'; 189: my $domain=$xmax-$xmin; 190: my $range=$ymax-$ymin; 191: my $xinterval=$domain/100.; 192: my $yinterval=$range/200.; 193: my $mult=($fixed?'a*':''); 194: return (<<ENDSETSVARIABLE); 195: document.ggbApplet_$id.evalCommand("a=1"); 196: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]"); 197: document.ggbApplet_$id.setVisible("$xvariable", false); 198: document.ggbApplet_$id.evalCommand("$xvariable=$xrel"); 199: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]"); 200: document.ggbApplet_$id.setVisible("$yvariable", false); 201: document.ggbApplet_$id.evalCommand("$yvariable=$yrel"); 202: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))"); 203: document.ggbApplet_$id.setLabelVisible("$variable", false); 204: ENDSETSVARIABLE 205: } 206: 207: # 208: # Input field name for a coordinate variable 209: # 210: 211: sub field_name { 212: my ($id,$variable,$name)=@_; 213: return "HWVAL_$id\_$variable\_$name"; 214: } 215: 216: # 217: # Generate an input field for a coordinate variable 218: # 219: 220: sub generate_input_field { 221: my ($id,$variable,$x,$y)=@_; 222: $Apache::functionplotresponse::inputfields.= 223: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 224: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 225: } 226: 227: # 228: # Initialize a new point coordinate variable at set a listener on it 229: # 230: sub new_point_coordinate { 231: my ($id,$variable,$x,$y,$fixed)=@_; 232: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 233: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 234: } 235: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 236: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 237: } 238: &generate_input_field($id,$variable,$x,$y); 239: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable); 240: } 241: 242: # 243: # Initialize a new slope coordinate variable at set a listener on it 244: # 245: sub new_slope_coordinate { 246: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 247: # 248: # $variable: name of the slope point 249: # $x, $y: coordinates of the slope point 250: # $pointname: name of the associated point point 251: # $xp $yp: coordinates of the point point 252: # 253: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 254: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 255: } 256: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 257: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 258: } 259: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) { 260: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')}; 261: } 262: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) { 263: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')}; 264: } 265: 266: &generate_input_field($id,$variable,$x,$y); 267: my $xrel=$x-$xp; 268: my $yrel=$y-$yp; 269: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable); 270: } 271: 272: # 273: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 274: # It then starts the right headers 275: # 276: sub start_init_script { 277: my ($id)=@_; 278: # Add id to the list of ggbInit_$id functions that need to be called 279: push(@Apache::functionplotresponse::callscripts,$id); 280: # ... and open this function 281: return (<<ENDSTARTINIT); 282: <script type="text/javascript"> 283: // <![CDATA[ 284: // variable that will eventually be passed back to the server 285: var coordinateMap_$id = []; 286: // flag for not loaded yet 287: var loaded_$id=false; 288: // Init-function for applet 289: function ggbInit_$id() { 290: ENDSTARTINIT 291: } 292: 293: # 294: # This sets the axes inside ggbInit_$id 295: # 296: 297: sub axes_script { 298: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 299: return (<<ENDAXESSCRIPT); 300: // changes (xmin, xmax, ymin, ymax) 301: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 302: 303: // makes the (x,y) axis (in)visible 304: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 305: // makes the grid (in)visible 306: document.ggbApplet_$id.setGridVisible($gvisible); 307: ENDAXESSCRIPT 308: } 309: 310: sub axes_label { 311: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_; 312: unless ($xlabel || $ylabel) { return ''; } 313: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 314: if ($xlabel) { 315: if (($ymin<0) && ($ymax>0)) { 316: $return.=(<<ENDXAXISLABELSCRIPT); 317: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 318: document.ggbApplet_$id.setVisible("Xlabel",false); 319: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 320: ENDXAXISLABELSCRIPT 321: } else { 322: $return.=(<<ENDXOFFAXISLABEL); 323: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]"); 324: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]"); 325: ENDXOFFAXISLABEL 326: } 327: } 328: if ($ylabel) { 329: if (($xmin<0) && ($xmax>0)) { 330: $return.=(<<ENDYAXISLABELSCRIPT); 331: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 332: document.ggbApplet_$id.setVisible("Ylabel",false); 333: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 334: ENDYAXISLABELSCRIPT 335: } else { 336: $return.=(<<ENDYOFFAXISLABEL); 337: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]"); 338: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]"); 339: ENDYOFFAXISLABEL 340: } 341: } 342: return $return; 343: } 344: 345: # 346: # Subroutine to produce background and answer plots 347: # 348: 349: sub plot_script { 350: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_; 351: $label=~s/\W//g; 352: if (($label) && ($label!~/^[A-Za-z]/)) { 353: $label='C'.$label; 354: } 355: my $visible=0; 356: if ($label) { 357: $visible="1"; 358: } else { 359: $Apache::functionplotresponse::counter++; 360: $label='C'.$Apache::functionplotresponse::counter; 361: } 362: my $rc=0; 363: my $gc=0; 364: my $bc=0; 365: if ($color) { 366: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/); 367: $rc=hex($rh); 368: $gc=hex($gh); 369: $bc=hex($bh); 370: } 371: if ($fixed) { 372: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n". 373: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n"). 374: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":''). 375: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":''); 376: } else { 377: return "document.ggbApplet_$id.evalCommand('y=$function');\n"; 378: } 379: } 380: 381: # 382: # Answer spline display 383: # 384: # points: x,y,slope_x,slope_y 385: 386: sub answer_spline_script { 387: my ($id,@points)=@_; 388: my $order=int(($#points+1)/4); 389: if ($order<2) { $order=2; } 390: if ($order>8) { $order=8; } 391: $Apache::functionplotresponse::counter++; 392: my $label='CSpline'.$Apache::functionplotresponse::counter; 393: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'['; 394: for (my $i=0;$i<=$#points;$i+=4) { 395: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),"; 396: } 397: $output=~s/\,$//; 398: $output.=']");'."\n"; 399: for (my $i=2; $i<2*$order; $i+=2) { 400: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n"; 401: } 402: for (my $i=1; $i<2*$order; $i+=2) { 403: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n"; 404: } 405: 406: return $output; 407: } 408: 409: # 410: # Subroutine that generates code for spline $label based on stored information 411: # 412: 413: sub generate_spline { 414: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 415: my $result=''; 416: my $order=$Apache::functionplotresponse::splineorder{$label}; 417: my $x=$Apache::functionplotresponse::splineinitx{$label}; 418: my $y=$Apache::functionplotresponse::splineinity{$label}; 419: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 420: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 421: my @coords=(); 422: foreach my $i (1..$order) { 423: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed); 424: my $xp=$x; 425: $x+=$sx/(2.*($order-1)); 426: push(@coords,$label.'P'.$i); 427: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed); 428: $x+=$sx/(2.*($order-1)); 429: push(@coords,$label.'S'.$i); 430: } 431: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 432: return $result; 433: } 434: # 435: # <backgroundplot function="..." fixed="yes/no" /> 436: # 437: sub start_backgroundplot { 438: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 439: my $result=''; 440: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 441: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 442: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval); 443: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval); 444: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 445: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval); 446: $color=~s/[^a-fA-F0-9]//gs; 447: unless (length($color)==6) { $color=''; } 448: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 449: 450: unless ($function) { $function="0"; } 451: if ($target eq 'web') { 452: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 453: unless (defined($xinitial)) { $xinitial=$xmin; } 454: unless (defined($xfinal)) { $xfinal=$xmax; } 455: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal); 456: } elsif ($target eq 'edit') { 457: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 458: &Apache::edit::text_arg('Function:','function', 459: $token,'16'). 460: &Apache::edit::text_arg('Initial x-value (optional):','xinitial', 461: $token,'8'). 462: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 463: $token,'8'). 464: &Apache::edit::text_arg('Label on Plot:','label', 465: $token,'8'). 466: &Apache::edit::text_arg('Color (hex code):','color', 467: $token,'8'). 468: &Apache::edit::select_arg('Fixed location:','fixed', 469: ['yes','no'],$token). 470: &Apache::edit::end_row(); 471: } elsif ($target eq 'modified') { 472: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 473: $safeeval,'function','label','xinitial','xfinal','color','fixed'); 474: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 475: } 476: return $result; 477: } 478: 479: sub end_backgroundplot { 480: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 481: my $result=''; 482: if ($target eq 'edit') { 483: $result=&Apache::edit::end_table(); 484: } 485: return $result; 486: } 487: 488: # 489: # <functionplotrule ... /> 490: # 491: sub start_functionplotrule { 492: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 493: my $result=''; 494: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 495: $Apache::functionplotresponse::counter++; 496: if ($label=~/\W/) { 497: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 498: } 499: $label=~s/\W//gs; 500: unless ($label) { 501: $label='R'.$Apache::functionplotresponse::counter; 502: } else { 503: $label='R'.$label; 504: } 505: if ($Apache::functionplotresponse::splineorder{$label}) { 506: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 507: } 508: 509: 510: if ($target eq 'grade') { 511: # Simply remember - in order - for later 512: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 513: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 514: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 515: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 516: } 517: $beginninglabel=~s/\W//gs; 518: $endinglabel=~s/\W//gs; 519: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 520: $relationship=~s/\W//gs; 521: $relationship=lc($relationship); 522: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 523: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 524: $relationship='eq'; 525: } 526: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 527: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) { 528: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 529: $derivative=0; 530: } 531: push(@Apache::functionplotresponse::functionplotrules,join(':',( 532: $label, 533: $derivative, 534: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 535: $beginninglabel, 536: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 537: $endinglabel, 538: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 539: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 540: $relationship, 541: &Apache::lonxml::get_param('value',$parstack,$safeeval), 542: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 543: ))); 544: } elsif ($target eq 'edit') { 545: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule'). 546: &Apache::edit::text_arg('Index/Name:','index', 547: $token,'10').' '. 548: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 549: [['0','Function itself'], 550: ['1','First derivative'], 551: ['2','Second derivative'], 552: ['-1','Integral']],$token).'<br />'. 553: &Apache::edit::text_arg('Initial x-value:','xinitial', 554: $token,'8'). 555: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel', 556: [['start','Start of Plot'], 557: ['end','End of Plot']],$token,'8').'<br />'. 558: 559: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 560: $token,'8'). 561: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel', 562: [['end','End of Plot']],$token,'8').'<br />'. 563: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength', 564: $token,'8'). 565: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength', 566: $token,'8').'<br />'. 567: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship', 568: [['eq','equal'], 569: ['ne','not equal'], 570: ['ge','greater than or equal'], 571: ['gt','greater than'], 572: ['lt','less than'], 573: ['le','less than or equal']],$token). 574: $result.= &Apache::edit::select_or_text_arg('Value:','value', 575: [['undef','not defined']],$token,'30'). 576: &Apache::edit::text_arg('Percent error:','percenterror', 577: $token,'8'). 578: &Apache::edit::end_row(); 579: } elsif ($target eq 'modified') { 580: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) { 581: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}=''; 582: } 583: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) { 584: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}=''; 585: } 586: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 587: $safeeval,'index','derivativeorder', 588: 'xinitial','xinitiallabel','xfinal','xfinallabel', 589: 'minimumlength','maximumlength', 590: 'relationship','value','percenterror'); 591: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 592: } 593: return $result; 594: } 595: 596: sub end_functionplotrule { 597: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 598: my $result=''; 599: if ($target eq 'edit') { 600: $result=&Apache::edit::end_table(); 601: } 602: return $result; 603: } 604: 605: 606: # 607: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 608: # 609: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 610: # 611: sub start_spline { 612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 613: my $result=''; 614: if ($target eq 'web') { 615: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 616: $Apache::functionplotresponse::counter++; 617: if ($label=~/\W/) { 618: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 619: } 620: $label=~s/\W//gs; 621: unless ($label) { 622: $label='S'.$Apache::functionplotresponse::counter; 623: } else { 624: $label='S'.$label; 625: } 626: if ($Apache::functionplotresponse::splineorder{$label}) { 627: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 628: } 629: 630: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 631: if ($order<2) { $order=2; } 632: if ($order>8) { $order=8; } 633: $Apache::functionplotresponse::splineorder{$label}=$order; 634: 635: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 636: unless ($x) { $x=0; } 637: $Apache::functionplotresponse::splineinitx{$label}=$x; 638: 639: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 640: unless ($y) { $y=0; } 641: $Apache::functionplotresponse::splineinity{$label}=$y; 642: 643: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 644: unless ($sx) { $sx=$order; } 645: $Apache::functionplotresponse::splinescalex{$label}=$sx; 646: 647: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 648: unless ($sy) { $sy=2; } 649: $Apache::functionplotresponse::splinescaley{$label}=$sy; 650: } elsif ($target eq 'edit') { 651: $result=&Apache::edit::tag_start($target,$token,'Spline'). 652: &Apache::edit::text_arg('Index:','index', 653: $token,'4').' '. 654: &Apache::edit::select_arg('Order:','order', 655: ['2','3','4','5','6','7','8'],$token).' '. 656: &Apache::edit::text_arg('Initial x-value:','initx', 657: $token,'4').' '. 658: &Apache::edit::text_arg('Initial y-value:','inity', 659: $token,'4').' '. 660: &Apache::edit::text_arg('Scale x:','scalex', 661: $token,'4').' '. 662: &Apache::edit::text_arg('Scale y:','scaley', 663: $token,'4'). 664: &Apache::edit::end_row(); 665: } elsif ($target eq 'modified') { 666: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 667: $safeeval,'index','order','initx','inity', 668: 'scalex','scaley'); 669: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 670: } 671: return $result; 672: } 673: 674: sub end_spline { 675: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 676: my $result=''; 677: if ($target eq 'edit') { 678: $result=&Apache::edit::end_table(); 679: } 680: return $result; 681: } 682: 683: sub end_init_script { 684: return (<<ENDENDINIT); 685: } 686: // ]]> 687: </script> 688: ENDENDINIT 689: } 690: 691: # 692: # Storing and restoring spline coordinates from part answers 693: # 694: sub decode_previous_answer { 695: my ($answer)=@_; 696: foreach my $coordinate (split(/\,/,$answer)) { 697: my ($key,$value)=split(/\=/,$coordinate); 698: $Apache::functionplotresponse::previous{$key}=$value; 699: } 700: } 701: 702: sub get_answer_from_form_fields { 703: my ($id)=@_; 704: my $answer=''; 705: my %coords=(); 706: foreach my $field (keys(%env)) { 707: if ($field=~/^form\.HWVAL\_$id/) { 708: $field=~/^form\.(.*)$/; 709: $coords{$1}=$env{$field}; 710: } 711: } 712: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 713: return ($answer,%coords); 714: } 715: 716: # 717: # The following functions calculate the cubic-hermite splines server-side 718: # 719: 720: sub cubic_hermite { 721: my ($t,$p1,$s1,$p2,$s2)=@_; 722: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 723: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2); 724: } 725: 726: # 727: # d/dt(...) 728: # 729: 730: sub ddt_cubic_hermite { 731: my ($t,$p1,$s1,$p2,$s2)=@_; 732: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 733: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2); 734: } 735: 736: # 737: # d^2/dt^2(...) 738: # 739: 740: sub d2dt2_cubic_hermite { 741: my ($t,$p1,$s1,$p2,$s2)=@_; 742: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+ 743: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2); 744: } 745: 746: # 747: # Array index calculation 748: # 749: sub array_index { 750: my ($xmin,$xmax,$x)=@_; 751: if ($x ne '') { 752: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 753: } else { 754: return undef; 755: } 756: } 757: 758: # 759: # Populate the arrays 760: # 761: 762: sub populate_arrays { 763: my ($id,$xmin,$xmax,$ymin,$ymax)=@_; 764: for (my $i=0; $i<=400; $i++) { 765: $Apache::functionplotresponse::actualxval[$i]=undef; 766: $Apache::functionplotresponse::func[$i]=undef; 767: $Apache::functionplotresponse::dfuncdx[$i]=undef; 768: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 769: } 770: unless ($xmax>$xmin) { return 'no_func'; } 771: # Run over all splines in response 772: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 773: my $xiold=-1; 774: # Run over all points in spline 775: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 776: my $ni=$i+1; 777: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 778: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 779: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 780: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 781: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 782: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 783: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 784: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 785: # Run in small steps over spline parameter 786: for (my $t=0; $t<=1; $t+=0.0001) { 787: my $xreal=&cubic_hermite($t,@xparms); 788: my $xi=&array_index($xmin,$xmax,$xreal); 789: if ($xi<$xiold) { return 'no_func'; } 790: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 791: $xiold=$xi; 792: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 793: # Function value 794: my $funcval=&cubic_hermite($t,@yparms); 795: 796: # Do we already have a value for this point, and is it different from the new one? 797: if ((defined($Apache::functionplotresponse::func[$xi])) && 798: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) { 799: return 'no_func'; 800: } 801: # Okay, remember the new point 802: $Apache::functionplotresponse::func[$xi]=$funcval; 803: 804: if (defined($funcval)) { 805: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 806: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 807: } 808: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 809: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 810: } 811: } 812: # Chain rule 813: # dy/dx=dy/dt/(dx/dt) 814: my $dxdt=&ddt_cubic_hermite($t,@xparms); 815: if ($dxdt) { 816: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 817: # Second derivative 818: $Apache::functionplotresponse::d2funcdx2[$xi]= 819: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 820: ($dxdt*$dxdt*$dxdt); 821: } 822: } 823: } 824: } 825: } 826: } 827: 828: # 829: # Implementation of <functionplotresponse> 830: # 831: 832: sub start_functionplotresponse { 833: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 834: my $result=''; 835: # To remember the splines - somehow, they need to come last 836: undef %Apache::functionplotresponse::splineorder; 837: undef %Apache::functionplotresponse::splineinitx; 838: undef %Apache::functionplotresponse::splineinity; 839: undef %Apache::functionplotresponse::splinescalex; 840: undef %Apache::functionplotresponse::splinescaley; 841: # Remember input fields, etc 842: undef %Apache::functionplotresponse::previous; 843: $Apache::functionplotresponse::inputfields=''; 844: $Apache::functionplotresponse::counter=0; 845: # Remember rules 846: undef @Apache::functionplotresponse::functionplotrules; 847: # Remember failed rules 848: if ($target eq 'grade') { 849: undef @Apache::functionplotresponse::failedrules; 850: } 851: # Delete previous awards 852: undef $Apache::functionplotresponse::awarddetail; 853: # Part and ID 854: my $partid=$Apache::inputtags::part; 855: my $id=&Apache::response::start_response($parstack,$safeeval); 856: # Internal ID to mark the applet and its coordinates 857: my $internalid = $partid.'_'.$id; 858: # Previous answer 859: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 860: 861: # Parameters of <functionplotresponse> 862: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval); 863: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 864: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 865: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 866: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 867: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 868: if ($target eq 'edit') { 869: $result.=&Apache::edit::start_table($token) 870: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 871: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 872: .&Apache::edit::deletelist($target,$token).'   ' 873: .&Apache::edit::insertlist($target,$token).'   ' 874: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses') 875: .'</span></td>' 876: ."<td> " 877: .&Apache::edit::end_row() 878: .&Apache::edit::start_spanning_row() 879: ."\n"; 880: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 881: $token,'6').' '. 882: &Apache::edit::text_arg('Minimum x-value:','xmin', 883: $token,'4').' '. 884: &Apache::edit::text_arg('Maximum x-value:','xmax', 885: $token,'4').' '. 886: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 887: ['yes','no'],$token).'<br />'. 888: &Apache::edit::text_arg('Label y-axis:','ylabel', 889: $token,'6').' '. 890: &Apache::edit::text_arg('Minimum y-value:','ymin', 891: $token,'4').' '. 892: &Apache::edit::text_arg('Maximum y-value:','ymax', 893: $token,'4').' '. 894: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 895: ['yes','no'],$token).'<br />'. 896: &Apache::edit::select_arg('Grid visible:','gridvisible', 897: ['yes','no'],$token).'<br />'. 898: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):', 899: 'answerdisplay',$token,'50'). 900: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 901: } elsif ($target eq 'modified') { 902: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 903: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 904: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay'); 905: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 906: 907: } elsif ($target eq 'meta') { 908: $result=&Apache::response::meta_package_write('functionplotresponse'); 909: } elsif (($target eq 'answer') && 910: ($env{'form.answer_output_mode'} ne 'tex') && 911: ($Apache::lonhomework::viewgrades == 'F')) { 912: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 913: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen(); 914: my $start_page = &Apache::loncommon::start_page('Rules Log', undef, 915: {'only_body' => 1, 916: 'bgcolor' => '#FFFFFF', 917: 'js_ready' => 1,}); 918: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,}); 919: $uname =~s/\W//g; 920: $udom =~s/\W//g; 921: my $function_name = 922: join('_','LONCAPA_scriptvars',$uname,$udom, 923: $env{'form.counter'},$Apache::lonxml::curdepth); 924: my $rules_var ="<script type=\"text/javascript\"> 925: // <![CDATA[ 926: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>". 927: $Apache::functionplotresponse::ruleslog. 928: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()} 929: // ]]> 930: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />"; 931: &Apache::lonxml::add_script_result($rules_var); 932: } 933: 934: return $result; 935: } 936: 937: sub compare_rel { 938: my ($relationship,$value,$realval,$tol)=@_; 939: # is the real value undefined? 940: unless (defined($realval)) { 941: # the real value is not defined 942: if ($relationship eq 'eq') { 943: if ($value eq 'undef') { 944: return 1; 945: } else { 946: return 0; 947: } 948: } elsif ($relationship eq 'ne') { 949: if ($value eq 'undef') { 950: return 0; 951: } else { 952: return 1; 953: } 954: } else { 955: return 0; 956: } 957: } 958: 959: # is the expected value undefined? 960: if ($value eq 'undef') { 961: # but by now we know that the real value is defined 962: return 0; 963: } 964: 965: # both are defined. 966: if ($relationship eq 'gt') { 967: return ($realval>$value); 968: } elsif ($relationship eq 'ge') { 969: return ($realval>$value-$tol); 970: } elsif ($relationship eq 'lt') { 971: return ($realval<$value); 972: } elsif ($relationship eq 'le') { 973: return ($realval<$value+$tol); 974: } elsif ($relationship eq 'ne') { 975: return (abs($value-$realval)>$tol); 976: } else { 977: return (abs($value-$realval)<$tol); 978: } 979: return 0; 980: } 981: 982: sub addlog { 983: my ($text)=@_; 984: $text=~s/\'/\\\'/g; 985: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 986: } 987: 988: sub actualval { 989: my ($i,$xmin,$xmax)=@_; 990: return $xmin+$i/400.*($xmax-$xmin); 991: } 992: 993: sub fpr_val { 994: my ($arg)=@_; 995: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg}, 996: $Apache::functionplotresponse::fpr_xmin, 997: $Apache::functionplotresponse::fpr_xmax); 998: } 999: 1000: sub fpr_f { 1001: my ($arg)=@_; 1002: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin, 1003: $Apache::functionplotresponse::fpr_xmax, 1004: $arg)]; 1005: } 1006: 1007: sub fpr_dfdx { 1008: my ($arg)=@_; 1009: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin, 1010: $Apache::functionplotresponse::fpr_xmax, 1011: $arg)]; 1012: } 1013: 1014: sub fpr_d2fdx2 { 1015: my ($arg)=@_; 1016: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin, 1017: $Apache::functionplotresponse::fpr_xmax, 1018: $arg)]; 1019: } 1020: 1021: sub functionplotrulecheck { 1022: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1023: 1024: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 1025: =split(/\:/,$rule); 1026: $percent=($percent>0?$percent:5); 1027: &addlog("================="); 1028: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value"); 1029: # 1030: # Evaluate the value 1031: # 1032: if ($value=~/\D/) { 1033: $Apache::functionplotresponse::fpr_xmin=$xmin; 1034: $Apache::functionplotresponse::fpr_xmax=$xmax; 1035: $value=&Apache::run::run($value,$safeeval); 1036: &addlog("Value evaluated to $value"); 1037: } 1038: 1039: # 1040: # Minimum and maximum lengths of the interval 1041: # 1042: if ((defined($minimumlength)) || (defined($maximumlength))) { 1043: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength"); 1044: } 1045: my $li=0; 1046: my $lh=400; 1047: 1048: # Special case: the upper boundary was not defined 1049: # and needs to be set to the value where 1050: # the condition is not true anymore => set flag 1051: 1052: my $findupper=0; 1053: if (($xfinal eq '') 1054: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 1055: && ($xfinallabel)) { 1056: $findupper=1; 1057: } 1058: 1059: # if a hard value is set for the boundaries, it overrides the label 1060: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 1061: $li=&array_index($xmin,$xmax,$xinitial); 1062: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 1063: } 1064: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 1065: $lh=&array_index($xmin,$xmax,$xfinal); 1066: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 1067: } 1068: # if the label is defined, use it 1069: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 1070: &addlog("Using lower label $xinitiallabel"); 1071: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 1072: } else { 1073: $li=&array_index($xmin,$xmax,$xinitial); 1074: } 1075: unless ($findupper) { 1076: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 1077: &addlog("Using upper label $xfinallabel"); 1078: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 1079: } else { 1080: $lh=&array_index($xmin,$xmax,$xfinal); 1081: } 1082: } 1083: # Basic sanity checks 1084: if ($li<0) { $li=0; } 1085: if ($lh>400) { $lh=400; } 1086: if (($li>$lh) || (!defined($lh))) { 1087: $lh=$li; 1088: } 1089: 1090: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 1091: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 1092: if ($findupper) { 1093: &addlog("Looking for label $xfinallabel"); 1094: } 1095: my $tol=$percent*($ymax-$ymin)/100; 1096: if ($xmax>$xmin) { 1097: if ($derivative==2) { 1098: $tol=4.*$tol/($xmax-$xmin); 1099: } elsif ($derivative==1) { 1100: $tol=2.*$tol/($xmax-$xmin); 1101: } elsif ($derivative==-1) { 1102: $tol=$tol*($xmax-$xmin)/2.; 1103: } 1104: } 1105: my $integral=0; 1106: my $binwidth=($xmax-$xmin)/400.; 1107: if (($derivative<0) && (!$findupper)) { 1108: # definite integral, calculate over whole length 1109: &addlog("Calculating definite integral"); 1110: for (my $i=$li; $i<=$lh; $i++) { 1111: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1112: } 1113: unless (&compare_rel($relationship,$value,$integral,$tol)) { 1114: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol"); 1115: &addlog("Rule $label failed."); 1116: my $hintlabel=$label; 1117: $hintlabel=~s/^R//; 1118: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1119: &addlog("Set hint condition $hintlabel"); 1120: return 0; 1121: } 1122: } else { 1123: for (my $i=$li; $i<=$lh; $i++) { 1124: my $val; 1125: if ($derivative==2) { 1126: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 1127: } elsif ($derivative==1) { 1128: $val=$Apache::functionplotresponse::dfuncdx[$i]; 1129: } elsif ($derivative==-1) { 1130: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1131: $val=$integral; 1132: } else { 1133: $val=$Apache::functionplotresponse::func[$i]; 1134: } 1135: unless (&compare_rel($relationship,$value,$val,$tol)) { 1136: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 1137: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 1138: if (($findupper) && ($i>$li)) { 1139: # Check lengths 1140: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1141: # Successfully found a new label, set it 1142: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 1143: &addlog("Rule $label passed, setting label $xfinallabel"); 1144: return 1; 1145: } else { 1146: &addlog("Rule $label failed."); 1147: &setfailed($label); 1148: return 0; 1149: } 1150: } 1151: } 1152: } 1153: # Corner case where this makes sense: using start or stop as defined labels 1154: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1155: &addlog("Rule $label passed."); 1156: return 1; 1157: } 1158: 1159: # 1160: # check for minimum and maximum lengths 1161: # 1162: 1163: sub checklength { 1164: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_; 1165: unless (($minimumlength) || ($maximumlength)) { return 1; } 1166: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 1167: if ($minimumlength) { 1168: if ($length<$minimumlength) { 1169: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 1170: &setfailed($label); 1171: return 0; 1172: } 1173: } 1174: if ($maximumlength) { 1175: if ($length>$maximumlength) { 1176: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 1177: &setfailed($label); 1178: return 0; 1179: } 1180: } 1181: return 1; 1182: } 1183: 1184: sub setfailed { 1185: my ($label)=@_; 1186: my $hintlabel=$label; 1187: $hintlabel=~s/^R//; 1188: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1189: &addlog("Set hint condition $hintlabel"); 1190: } 1191: 1192: sub start_functionplotruleset { 1193: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1194: if ($target eq 'edit') { 1195: return &Apache::edit::start_table($token). 1196: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 1197: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1198: .&Apache::edit::deletelist($target,$token).'   '. 1199: &Apache::edit::insertlist($target,$token).'   ' 1200: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules') 1201: .'</span></td>' 1202: ."<td> " 1203: .&Apache::edit::end_row() 1204: .&Apache::edit::start_spanning_row() 1205: ."\n"; 1206: } 1207: } 1208: 1209: sub end_functionplotruleset { 1210: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1211: my $id=$Apache::inputtags::response[-1]; 1212: my $partid=$Apache::inputtags::part; 1213: my $internalid = $partid.'_'.$id; 1214: 1215: if ($target eq 'edit' ) { 1216: return &Apache::edit::end_table(); 1217: } elsif ($target eq 'grade' 1218: && &Apache::response::submitted() 1219: && $Apache::lonhomework::type ne 'exam') { 1220: # 1221: # Actually grade 1222: # 1223: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1224: 1225: my $ad=''; 1226: undef %Apache::functionplotresponse::functionplotrulelabels; 1227: $Apache::functionplotresponse::ruleslog=''; 1228: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 1229: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 1230: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') { 1231: $ad='NOT_FUNCTION'; 1232: } else { 1233: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 1234: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 1235: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1236: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1237: 1238: # We have a function that we can actually grade, go through the spline rules. 1239: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1240: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1241: $ad='INCORRECT'; 1242: last; 1243: } 1244: } 1245: # If it's not wrong, it's correct 1246: unless ($ad) { $ad='EXACT_ANS' }; 1247: } 1248: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1249: &addlog("Assigned award detail: $ad"); 1250: # Store for later to be assigned at end_functionplotresponse 1251: $Apache::functionplotresponse::awarddetail=$ad; 1252: } 1253: } 1254: 1255: 1256: sub end_functionplotresponse { 1257: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1258: &Apache::response::end_response; 1259: 1260: my $result; 1261: my $id=$Apache::inputtags::response[-1]; 1262: my $partid=$Apache::inputtags::part; 1263: my $internalid = $partid.'_'.$id; 1264: 1265: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 1266: if ($target eq 'grade' 1267: && &Apache::response::submitted() 1268: && $Apache::lonhomework::type eq 'exam') { 1269: 1270: &Apache::response::scored_response($partid,$id); 1271: 1272: } elsif ($target eq 'grade' 1273: && &Apache::response::submitted() 1274: && $Apache::lonhomework::type ne 'exam') { 1275: my ($response,%coords)=&get_answer_from_form_fields($internalid); 1276: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 1277: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 1278: # 1279: # Assign grade 1280: # 1281: my $ad=$Apache::functionplotresponse::awarddetail; 1282: # 1283: # Store grading info 1284: # 1285: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 1286: &Apache::response::handle_previous(\%previous,$ad); 1287: } elsif ($target eq 'web') { 1288: undef @Apache::functionplotresponse::failedrules; 1289: } 1290: return $result; 1291: } 1292: 1293: sub end_functionplotelements { 1294: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1295: my $result=''; 1296: my $id=$Apache::inputtags::response[-1]; 1297: my $partid=$Apache::inputtags::part; 1298: my $internalid = $partid.'_'.$id; 1299: if ($target eq 'edit' ) { 1300: $result=&Apache::edit::end_table(); 1301: } elsif ($target eq 'web') { 1302: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1303: 1304: # Are we in show answer mode? 1305: my $showanswer=&Apache::response::show_answer(); 1306: if ($showanswer) { 1307: # Render answerdisplay 1308: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2); 1309: if ($answerdisplay=~/\S/s) { 1310: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) { 1311: my @components=split(/\s*\:\s*/,$plot); 1312: if ($#components<3) { 1313: # Just a simple plot 1314: my ($func,$xl,$xh)=@components; 1315: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; } 1316: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; } 1317: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6); 1318: } else { 1319: # This is a spline 1320: $result.=&answer_spline_script($internalid,@components); 1321: } 1322: } 1323: } 1324: } 1325: my $fixed=0; 1326: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; } 1327: # Now is the time to render all of the stored splines 1328: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1329: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed); 1330: } 1331: # close the init script 1332: $result.=&end_init_script(); 1333: # register all splines in this response 1334: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 1335: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 1336: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1337: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 1338: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 1339: } 1340: # generate the input fields 1341: $result.=$Apache::functionplotresponse::inputfields; 1342: # actually start the <applet>-tag 1343: $result.=&geogebra_startcode($internalid); 1344: # load the spline bytecode 1345: $result.=&geogebra_spline_program(); 1346: # set default parameters 1347: $result.=&geogebra_default_parameters($internalid); 1348: # close the <applet>-tag 1349: $result.=&geogebra_endcode(); 1350: } 1351: return $result; 1352: } 1353: 1354: sub boundaries { 1355: my ($parstack,$safeeval,$level)=@_; 1356: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level); 1357: $xmin=(defined($xmin)?$xmin:-10); 1358: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level); 1359: $xmax=(defined($xmax)?$xmax:10); 1360: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level); 1361: $ymin=(defined($ymin)?$ymin:-10); 1362: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level); 1363: $ymax=(defined($ymax)?$ymax:10); 1364: if ($xmax<=$xmin) { 1365: $xmax=$xmin+20; 1366: } 1367: if ($ymax<=$ymin) { 1368: $ymax=$ymin+20; 1369: } 1370: return ($xmin,$xmax,$ymin,$ymax); 1371: } 1372: 1373: sub start_functionplotelements { 1374: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1375: my $result=''; 1376: my $id=$Apache::inputtags::response[-1]; 1377: my $partid=$Apache::inputtags::part; 1378: my $internalid = $partid.'_'.$id; 1379: 1380: if ($target eq 'edit') { 1381: return &Apache::edit::start_table($token). 1382: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 1383: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1384: .&Apache::edit::deletelist($target,$token).'   '. 1385: &Apache::edit::insertlist($target,$token).'   ' 1386: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements') 1387: .'</span></td>' 1388: ."<td> " 1389: .&Apache::edit::end_row() 1390: .&Apache::edit::start_spanning_row() 1391: ."\n"; 1392: } elsif ($target eq 'web') { 1393: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1394: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1395: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1396: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1397: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 1398: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 1399: 1400: 1401: # paste in the update routine to receive stuff back from the applet 1402: $result.=&update_script($internalid); 1403: # start the initscript for this applet 1404: $result.=&start_init_script($internalid); 1405: # put the axis commands inside 1406: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 1407: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel); 1408: # init script is left open 1409: } 1410: return $result; 1411: } 1412: 1413: 1; 1414: 1415: __END__ 1416: 1417: =head1 NAME 1418: 1419: Apache::functionplotresponse.pm; 1420: 1421: =head1 SYNOPSIS 1422: 1423: Handles tags associated with accepting function plots. 1424: 1425: This is part of the LearningOnline Network with CAPA project 1426: described at http://www.lon-capa.org. 1427: 1428: =head1 HANDLER SUBROUTINE 1429: 1430: start_functionplotresponse() 1431: 1432: =head1 OTHER SUBROUTINES 1433: 1434: =over 1435: 1436: =item end_functionplotresponse() 1437: 1438: =back 1439: 1440: =cut