loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
Revision 1.70: download - view: text, annotated - select for diffs
Fri Nov 18 16:39:22 2011 UTC (12 years, 6 months ago) by www
Branches: MAIN
CVS tags: HEAD

Work in progress: objects and vectors

1: # LearningOnline Network with CAPA 2: # Functionplot responses 3: # 4: # $Id: functionplotresponse.pm,v 1.70 2011/11/18 16:39:22 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: 'plotobject','plotvector', 39: 'functionplotrule','functionplotruleset', 40: 'functionplotelements')); 41: } 42: 43: # 44: # There can be a number of applets on a page, each called ggbApplet_$id, 45: # where $id is the "_"-concatenated part and responseid 46: # 47: 48: sub geogebra_startcode { 49: my ($id)=@_; 50: return (<<ENDSTARTCODE); 51: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar" 52: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT> 53: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/> 54: ENDSTARTCODE 55: } 56: 57: sub geogebra_endcode { 58: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n"; 59: } 60: 61: # 62: # This is the internal GeoGebra bytecode which defines the spline functions 63: # 64: sub geogebra_spline_program { 65: return (<<ENDSPLINEPROGRAM); 66: <param name="ggbBase64" value="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"/> 67: ENDSPLINEPROGRAM 68: } 69: 70: # 71: # The standard set of parameters inside <applet> 72: # 73: sub geogebra_default_parameters { 74: my ($id)=@_; 75: return(<<ENDDEFAULTPARAMETERS); 76: <param name="image" value="/adm/lonIcons/lonanim.gif" /> 77: <param name="boxborder" value="false" /> 78: <param name="centerimage" value="true" /> 79: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_algos.jar, geogebra_javascript.jar, geogebra_properties.jar, jlatexmath.jar, jlm_cyrillic.jar, jlm_greek.jar" /> 80: <param name="cache_version" value="4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0" /> 81: <param name="framePossible" value="false" /> 82: 83: <param name="showResetIcon" value="false" /> 84: <param name="showAnimationButton" value="false" /> 85: <param name="enableRightClick" value="false" /> 86: <param name="errorDialogsActive" value="true" /> 87: <param name="enableLabelDrags" value="false" /> 88: <param name="showMenuBar" value="false" /> 89: <param name="showToolBar" value="false" /> 90: <param name="showToolBarHelp" value="false" /> 91: <param name="showAlgebraInput" value="false" /> 92: <param name="enableShiftDragZoom" value="false" /> 93: <param name="allowRescaling" value="false" /> 94: <param name="enableLabelDrags" value="false" /> 95: <param name="ggbOnInitParam" value="applet_$id" /> 96: ENDDEFAULTPARAMETERS 97: } 98: 99: # 100: # This subroutine is called by LON-CAPA at </problem> 101: # Each applet on the page will call function ggbOnInit when it is done loading 102: # This function in turn will call the respective function registered by start_init_script 103: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit 104: # 105: 106: sub init_script { 107: if ($#Apache::functionplotresponse::callscripts>=0) { 108: my $script=''; 109: foreach my $id (@Apache::functionplotresponse::callscripts) { 110: $script.="if (param=='applet_$id') { loaded_$id=true; }\n"; 111: } 112: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)). 113: ") { setTimeout('ggbInitAll()',200) }"; 114: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts)); 115: return (<<ENDGGBINIT); 116: <script type="text/javascript"> 117: // <![CDATA[ 118: // Function that each applet will call when loaded 119: // It will pass "its" parameter 120: // Set flags for when an applet is loaded, wait till all are loaded, and then some 121: function ggbOnInit(param) { 122: $script 123: } 124: function ggbInitAll() { 125: $calls 126: } 127: // ]]> 128: </script> 129: ENDGGBINIT 130: } 131: } 132: 133: # 134: # Each Geogebra applet is supposed to call this when parameters change 135: # Changes the hidden fields on the web page 136: # 137: sub update_script { 138: my ($id)=@_; 139: return (<<ENDUPDATESCRIPT); 140: <script type="text/javascript"> 141: // <![CDATA[ 142: function updatePointCoordinates_$id(coordinateName) { 143: var x = document.ggbApplet_$id.getXcoord(coordinateName); 144: var y = document.ggbApplet_$id.getYcoord(coordinateName); 145: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x; 146: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y; 147: } 148: // ]]> 149: </script> 150: ENDUPDATESCRIPT 151: } 152: 153: # 154: # Register the above update-handler for a variable 155: # 156: 157: sub update_register { 158: my ($id,$variable)=@_; 159: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n"; 160: } 161: 162: # 163: # Set a point coordinate variable 164: # 165: sub set_point_coordinate { 166: my ($id,$variable,$x,$y,$fixed)=@_; 167: my $mult=($fixed?'a*':''); 168: # Get rid of wild exponents, make sure it's a number 169: $x=1.*$x; 170: $y=1.*$y; 171: # GeoGebra does not understand "E" 172: $x=~s/[e|E]/\*10\^/; 173: $x=~s/\+//; 174: $y=~s/[e|E]/\*10\^/; 175: $y=~s/\+//; 176: return (<<ENDSETVARIABLE); 177: document.ggbApplet_$id.evalCommand("a=1"); 178: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)"); 179: document.ggbApplet_$id.setLabelVisible("$variable",false); 180: ENDSETVARIABLE 181: } 182: 183: # 184: # Set a slope coordinate variable 185: # 186: sub set_slope_coordinate { 187: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_; 188: my $xvariable=$variable.'x'; 189: my $yvariable=$variable.'y'; 190: my $domain=$xmax-$xmin; 191: my $range=$ymax-$ymin; 192: my $xinterval=$domain/100.; 193: my $yinterval=$range/200.; 194: my $mult=($fixed?'a*':''); 195: return (<<ENDSETSVARIABLE); 196: document.ggbApplet_$id.evalCommand("a=1"); 197: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]"); 198: document.ggbApplet_$id.setVisible("$xvariable", false); 199: document.ggbApplet_$id.evalCommand("$xvariable=$xrel"); 200: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]"); 201: document.ggbApplet_$id.setVisible("$yvariable", false); 202: document.ggbApplet_$id.evalCommand("$yvariable=$yrel"); 203: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))"); 204: document.ggbApplet_$id.setLabelVisible("$variable", false); 205: ENDSETSVARIABLE 206: } 207: 208: # 209: # Input field name for a coordinate variable 210: # 211: 212: sub field_name { 213: my ($id,$variable,$name)=@_; 214: return "HWVAL_$id\_$variable\_$name"; 215: } 216: 217: # 218: # Generate an input field for a coordinate variable 219: # 220: 221: sub generate_input_field { 222: my ($id,$variable,$x,$y)=@_; 223: $Apache::functionplotresponse::inputfields.= 224: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 225: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 226: } 227: 228: # 229: # Initialize a new point coordinate variable at set a listener on it 230: # 231: sub new_point_coordinate { 232: my ($id,$variable,$x,$y,$fixed)=@_; 233: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 234: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 235: } 236: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 237: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 238: } 239: &generate_input_field($id,$variable,$x,$y); 240: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable); 241: } 242: 243: # 244: # Initialize a new slope coordinate variable at set a listener on it 245: # 246: sub new_slope_coordinate { 247: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 248: # 249: # $variable: name of the slope point 250: # $x, $y: coordinates of the slope point 251: # $pointname: name of the associated point point 252: # $xp $yp: coordinates of the point point 253: # 254: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 255: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 256: } 257: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 258: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 259: } 260: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) { 261: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')}; 262: } 263: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) { 264: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')}; 265: } 266: 267: &generate_input_field($id,$variable,$x,$y); 268: my $xrel=$x-$xp; 269: my $yrel=$y-$yp; 270: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable); 271: } 272: 273: # 274: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 275: # It then starts the right headers 276: # 277: sub start_init_script { 278: my ($id)=@_; 279: # Add id to the list of ggbInit_$id functions that need to be called 280: push(@Apache::functionplotresponse::callscripts,$id); 281: # ... and open this function 282: return (<<ENDSTARTINIT); 283: <script type="text/javascript"> 284: // <![CDATA[ 285: // variable that will eventually be passed back to the server 286: var coordinateMap_$id = []; 287: // flag for not loaded yet 288: var loaded_$id=false; 289: // Init-function for applet 290: function ggbInit_$id() { 291: ENDSTARTINIT 292: } 293: 294: # 295: # This sets the axes inside ggbInit_$id 296: # 297: 298: sub axes_script { 299: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 300: return (<<ENDAXESSCRIPT); 301: // changes (xmin, xmax, ymin, ymax) 302: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 303: 304: // makes the (x,y) axis (in)visible 305: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 306: // makes the grid (in)visible 307: document.ggbApplet_$id.setGridVisible($gvisible); 308: ENDAXESSCRIPT 309: } 310: 311: sub axes_label { 312: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_; 313: unless ($xlabel || $ylabel) { return ''; } 314: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 315: if ($xlabel) { 316: if (($ymin<0) && ($ymax>0)) { 317: $return.=(<<ENDXAXISLABELSCRIPT); 318: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 319: document.ggbApplet_$id.setVisible("Xlabel",false); 320: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 321: ENDXAXISLABELSCRIPT 322: } else { 323: $return.=(<<ENDXOFFAXISLABEL); 324: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]"); 325: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]"); 326: ENDXOFFAXISLABEL 327: } 328: } 329: if ($ylabel) { 330: if (($xmin<0) && ($xmax>0)) { 331: $return.=(<<ENDYAXISLABELSCRIPT); 332: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 333: document.ggbApplet_$id.setVisible("Ylabel",false); 334: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 335: ENDYAXISLABELSCRIPT 336: } else { 337: $return.=(<<ENDYOFFAXISLABEL); 338: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]"); 339: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]"); 340: ENDYOFFAXISLABEL 341: } 342: } 343: return $return; 344: } 345: 346: # 347: # Subroutine to produce background and answer plots 348: # 349: 350: sub plot_script { 351: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_; 352: $label=~s/\W//g; 353: if (($label) && ($label!~/^[A-Za-z]/)) { 354: $label='C'.$label; 355: } 356: my $visible=0; 357: if ($label) { 358: $visible="1"; 359: } else { 360: $Apache::functionplotresponse::counter++; 361: $label='C'.$Apache::functionplotresponse::counter; 362: } 363: my $rc=0; 364: my $gc=0; 365: my $bc=0; 366: if ($color) { 367: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/); 368: $rc=hex($rh); 369: $gc=hex($gh); 370: $bc=hex($bh); 371: } 372: if ($fixed) { 373: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n". 374: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n"). 375: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":''). 376: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":''); 377: } else { 378: return "document.ggbApplet_$id.evalCommand('y=$function');\n"; 379: } 380: } 381: 382: # 383: # Subroutine to produce objects 384: # 385: 386: sub plotobject_script { 387: my ($id,$label,$x,$y)=@_; 388: unless ($label) { 389: $Apache::functionplotresponse::counter++; 390: $label='O'.$Apache::functionplotresponse::counter; 391: } 392: return "document.ggbApplet_$id.evalCommand('a=1');\n". 393: "document.ggbApplet_$id.setVisible('a', false);\n". 394: "document.ggbApplet_$id.setLabelVisible('a', false);\n". 395: "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n". 396: "document.ggbApplet_$id.setVisible('$label', true);\n". 397: "document.ggbApplet_$id.setLabelVisible('$label', true);\n"; 398: } 399: 400: # 401: # Subroutine to produce vectors 402: # 403: 404: sub plotvector_script { 405: my ($id,$label,$xs,$ys,$xe,$ye)=@_; 406: unless ($label) { 407: $Apache::functionplotresponse::counter++; 408: $label='V'.$Apache::functionplotresponse::counter; 409: } 410: return(<<ENDVECTOR); 411: document.ggbApplet1.evalCommand("Gravitystart=(20,0)"); 412: document.ggbApplet1.setVisible("Gravitystart",false); 413: document.ggbApplet1.setLabelVisible("Gravitystart",false); 414: document.ggbApplet1.evalCommand("Gravityend=(20,-5)"); 415: document.ggbApplet1.setLabelVisible("Gravityend",false); 416: document.ggbApplet1.evalCommand("Gravity=Vector[Gravitystart, Gravityend]"); 417: document.ggbApplet1.setLabelVisible("Gravity",true); 418: document.ggbApplet1.setLineThickness("Gravity",8); 419: // Displays the Angle 420: document.ggbApplet1.evalCommand("Gravitypoint=(110,y(Gravitystart))"); //The x-value for this should be 2*(xmax-xmin)+xmax; 421: document.ggbApplet1.evalCommand("GravityAngle=Angle[Gravitypoint,Gravitystart,Gravityend]"); 422: document.ggbApplet1.setLabelVisible("GravityAngle",true); 423: document.ggbApplet1.setLabelStyle("GravityAngle",VALUE=2); 424: // Keeps track of points we care about (This should use the same listener function we use in graph problems) 425: //document.ggbApplet1.registerObjectUpdateListener('Gravitystart','updatePointCoordinates'); 426: //document.ggbApplet1.registerObjectUpdateListener('Gravityend','updatePointCoordinates'); 427: //document.ggbApplet1.registerObjectUpdateListener('GravityAngle','updatePointCoordinates'); 428: ENDVECTOR 429: } 430: 431: # 432: # Answer spline display 433: # 434: # points: x,y,slope_x,slope_y 435: 436: sub answer_spline_script { 437: my ($id,@points)=@_; 438: my $order=int(($#points+1)/4); 439: if ($order<2) { $order=2; } 440: if ($order>8) { $order=8; } 441: $Apache::functionplotresponse::counter++; 442: my $label='CSpline'.$Apache::functionplotresponse::counter; 443: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'['; 444: for (my $i=0;$i<=$#points;$i+=4) { 445: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),"; 446: } 447: $output=~s/\,$//; 448: $output.=']");'."\n"; 449: for (my $i=2; $i<2*$order; $i+=2) { 450: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n"; 451: } 452: for (my $i=1; $i<2*$order; $i+=2) { 453: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n"; 454: } 455: 456: return $output; 457: } 458: 459: # 460: # Subroutine that generates code for spline $label based on stored information 461: # 462: 463: sub generate_spline { 464: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 465: my $result=''; 466: my $order=$Apache::functionplotresponse::splineorder{$label}; 467: my $x=$Apache::functionplotresponse::splineinitx{$label}; 468: my $y=$Apache::functionplotresponse::splineinity{$label}; 469: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 470: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 471: my @coords=(); 472: foreach my $i (1..$order) { 473: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed); 474: my $xp=$x; 475: $x+=$sx/(2.*($order-1)); 476: push(@coords,$label.'P'.$i); 477: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed); 478: $x+=$sx/(2.*($order-1)); 479: push(@coords,$label.'S'.$i); 480: } 481: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 482: return $result; 483: } 484: 485: # 486: # Object 487: # 488: 489: sub start_plotobject { 490: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 491: my $result=''; 492: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 493: my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval); 494: my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval); 495: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 496: $label=~s/\W//gs; 497: $label=ucfirst($label); 498: unless ($label) { $label="NewObject"; } 499: if ($target eq 'web') { 500: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 501: unless (defined($x)) { $x=$xmin; } 502: unless (defined($y)) { $y=$ymin; } 503: $result.=&plotobject_script($internalid,$label,$x,$y); 504: } elsif ($target eq 'edit') { 505: $result=&Apache::edit::tag_start($target,$token,'Plot Object'). 506: &Apache::edit::text_arg('Label on Plot:','label', 507: $token,'16'). 508: &Apache::edit::text_arg('x:','x', 509: $token,'8'). 510: &Apache::edit::text_arg('y:','y', 511: $token,'8'). 512: &Apache::edit::end_row(); 513: } elsif ($target eq 'modified') { 514: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','x','y'); 515: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 516: } 517: return $result; 518: } 519: 520: sub end_plotobject { 521: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 522: my $result=''; 523: if ($target eq 'edit') { 524: $result=&Apache::edit::end_table(); 525: } 526: return $result; 527: } 528: 529: 530: # 531: # <backgroundplot function="..." fixed="yes/no" /> 532: # 533: sub start_backgroundplot { 534: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 535: my $result=''; 536: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 537: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 538: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval); 539: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval); 540: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 541: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval); 542: $color=~s/[^a-fA-F0-9]//gs; 543: unless (length($color)==6) { $color=''; } 544: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 545: 546: unless ($function) { $function="0"; } 547: if ($target eq 'web') { 548: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 549: unless (defined($xinitial)) { $xinitial=$xmin; } 550: unless (defined($xfinal)) { $xfinal=$xmax; } 551: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal); 552: } elsif ($target eq 'edit') { 553: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 554: &Apache::edit::text_arg('Function:','function', 555: $token,'16'). 556: &Apache::edit::text_arg('Initial x-value (optional):','xinitial', 557: $token,'8'). 558: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 559: $token,'8'). 560: &Apache::edit::text_arg('Label on Plot:','label', 561: $token,'8'). 562: &Apache::edit::text_arg('Color (hex code):','color', 563: $token,'8'). 564: &Apache::edit::select_arg('Fixed location:','fixed', 565: ['yes','no'],$token). 566: &Apache::edit::end_row(); 567: } elsif ($target eq 'modified') { 568: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 569: $safeeval,'function','label','xinitial','xfinal','color','fixed'); 570: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 571: } 572: return $result; 573: } 574: 575: sub end_backgroundplot { 576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 577: my $result=''; 578: if ($target eq 'edit') { 579: $result=&Apache::edit::end_table(); 580: } 581: return $result; 582: } 583: 584: # 585: # <functionplotrule ... /> 586: # 587: sub start_functionplotrule { 588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 589: my $result=''; 590: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 591: $Apache::functionplotresponse::counter++; 592: if ($label=~/\W/) { 593: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 594: } 595: $label=~s/\W//gs; 596: unless ($label) { 597: $label='R'.$Apache::functionplotresponse::counter; 598: } else { 599: $label='R'.$label; 600: } 601: if ($Apache::functionplotresponse::splineorder{$label}) { 602: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 603: } 604: 605: 606: if ($target eq 'grade') { 607: # Simply remember - in order - for later 608: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 609: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 610: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 611: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 612: } 613: $beginninglabel=~s/\W//gs; 614: $endinglabel=~s/\W//gs; 615: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 616: $relationship=~s/\W//gs; 617: $relationship=lc($relationship); 618: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 619: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 620: $relationship='eq'; 621: } 622: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 623: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) { 624: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 625: $derivative=0; 626: } 627: push(@Apache::functionplotresponse::functionplotrules,join(':',( 628: $label, 629: $derivative, 630: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 631: $beginninglabel, 632: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 633: $endinglabel, 634: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 635: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 636: $relationship, 637: &Apache::lonxml::get_param('value',$parstack,$safeeval), 638: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 639: ))); 640: } elsif ($target eq 'edit') { 641: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule'). 642: &Apache::edit::text_arg('Index/Name:','index', 643: $token,'10').' '. 644: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 645: [['0','Function itself'], 646: ['1','First derivative'], 647: ['2','Second derivative'], 648: ['-1','Integral']],$token).'<br />'. 649: &Apache::edit::text_arg('Initial x-value:','xinitial', 650: $token,'8'). 651: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel', 652: [['start','Start of Plot'], 653: ['end','End of Plot']],$token,'8').'<br />'. 654: 655: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 656: $token,'8'). 657: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel', 658: [['end','End of Plot']],$token,'8').'<br />'. 659: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength', 660: $token,'8'). 661: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength', 662: $token,'8').'<br />'. 663: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship', 664: [['eq','equal'], 665: ['ne','not equal'], 666: ['ge','greater than or equal'], 667: ['gt','greater than'], 668: ['lt','less than'], 669: ['le','less than or equal']],$token). 670: $result.= &Apache::edit::select_or_text_arg('Value:','value', 671: [['undef','not defined']],$token,'30'). 672: &Apache::edit::text_arg('Percent error:','percenterror', 673: $token,'8'). 674: &Apache::edit::end_row(); 675: } elsif ($target eq 'modified') { 676: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) { 677: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}=''; 678: } 679: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) { 680: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}=''; 681: } 682: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 683: $safeeval,'index','derivativeorder', 684: 'xinitial','xinitiallabel','xfinal','xfinallabel', 685: 'minimumlength','maximumlength', 686: 'relationship','value','percenterror'); 687: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 688: } 689: return $result; 690: } 691: 692: sub end_functionplotrule { 693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 694: my $result=''; 695: if ($target eq 'edit') { 696: $result=&Apache::edit::end_table(); 697: } 698: return $result; 699: } 700: 701: 702: # 703: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 704: # 705: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 706: # 707: sub start_spline { 708: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 709: my $result=''; 710: if ($target eq 'web') { 711: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 712: $Apache::functionplotresponse::counter++; 713: if ($label=~/\W/) { 714: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 715: } 716: $label=~s/\W//gs; 717: unless ($label) { 718: $label='S'.$Apache::functionplotresponse::counter; 719: } else { 720: $label='S'.$label; 721: } 722: if ($Apache::functionplotresponse::splineorder{$label}) { 723: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 724: } 725: 726: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 727: if ($order<2) { $order=2; } 728: if ($order>8) { $order=8; } 729: $Apache::functionplotresponse::splineorder{$label}=$order; 730: 731: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 732: unless ($x) { $x=0; } 733: $Apache::functionplotresponse::splineinitx{$label}=$x; 734: 735: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 736: unless ($y) { $y=0; } 737: $Apache::functionplotresponse::splineinity{$label}=$y; 738: 739: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 740: unless ($sx) { $sx=$order; } 741: $Apache::functionplotresponse::splinescalex{$label}=$sx; 742: 743: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 744: unless ($sy) { $sy=2; } 745: $Apache::functionplotresponse::splinescaley{$label}=$sy; 746: } elsif ($target eq 'edit') { 747: $result=&Apache::edit::tag_start($target,$token,'Spline'). 748: &Apache::edit::text_arg('Index:','index', 749: $token,'4').' '. 750: &Apache::edit::select_arg('Order:','order', 751: ['2','3','4','5','6','7','8'],$token).' '. 752: &Apache::edit::text_arg('Initial x-value:','initx', 753: $token,'4').' '. 754: &Apache::edit::text_arg('Initial y-value:','inity', 755: $token,'4').' '. 756: &Apache::edit::text_arg('Scale x:','scalex', 757: $token,'4').' '. 758: &Apache::edit::text_arg('Scale y:','scaley', 759: $token,'4'). 760: &Apache::edit::end_row(); 761: } elsif ($target eq 'modified') { 762: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 763: $safeeval,'index','order','initx','inity', 764: 'scalex','scaley'); 765: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 766: } 767: return $result; 768: } 769: 770: sub end_spline { 771: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 772: my $result=''; 773: if ($target eq 'edit') { 774: $result=&Apache::edit::end_table(); 775: } 776: return $result; 777: } 778: 779: sub end_init_script { 780: return (<<ENDENDINIT); 781: } 782: // ]]> 783: </script> 784: ENDENDINIT 785: } 786: 787: # 788: # Storing and restoring spline coordinates from part answers 789: # 790: sub decode_previous_answer { 791: my ($answer)=@_; 792: foreach my $coordinate (split(/\,/,$answer)) { 793: my ($key,$value)=split(/\=/,$coordinate); 794: $Apache::functionplotresponse::previous{$key}=$value; 795: } 796: } 797: 798: sub get_answer_from_form_fields { 799: my ($id)=@_; 800: my $answer=''; 801: my %coords=(); 802: foreach my $field (keys(%env)) { 803: if ($field=~/^form\.HWVAL\_$id/) { 804: $field=~/^form\.(.*)$/; 805: $coords{$1}=$env{$field}; 806: } 807: } 808: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 809: return ($answer,%coords); 810: } 811: 812: # 813: # The following functions calculate the cubic-hermite splines server-side 814: # 815: 816: sub cubic_hermite { 817: my ($t,$p1,$s1,$p2,$s2)=@_; 818: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 819: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2); 820: } 821: 822: # 823: # d/dt(...) 824: # 825: 826: sub ddt_cubic_hermite { 827: my ($t,$p1,$s1,$p2,$s2)=@_; 828: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 829: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2); 830: } 831: 832: # 833: # d^2/dt^2(...) 834: # 835: 836: sub d2dt2_cubic_hermite { 837: my ($t,$p1,$s1,$p2,$s2)=@_; 838: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+ 839: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2); 840: } 841: 842: # 843: # Array index calculation 844: # 845: sub array_index { 846: my ($xmin,$xmax,$x)=@_; 847: if ($x ne '') { 848: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 849: } else { 850: return undef; 851: } 852: } 853: 854: # 855: # Populate the arrays 856: # 857: 858: sub populate_arrays { 859: my ($id,$xmin,$xmax,$ymin,$ymax)=@_; 860: for (my $i=0; $i<=400; $i++) { 861: $Apache::functionplotresponse::actualxval[$i]=undef; 862: $Apache::functionplotresponse::func[$i]=undef; 863: $Apache::functionplotresponse::dfuncdx[$i]=undef; 864: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 865: } 866: unless ($xmax>$xmin) { return 'no_func'; } 867: # Run over all splines in response 868: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 869: my $xiold=-1; 870: # Run over all points in spline 871: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 872: my $ni=$i+1; 873: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 874: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 875: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 876: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 877: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 878: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 879: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 880: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 881: # Run in small steps over spline parameter 882: for (my $t=0; $t<=1; $t+=0.0001) { 883: my $xreal=&cubic_hermite($t,@xparms); 884: my $xi=&array_index($xmin,$xmax,$xreal); 885: if ($xi<$xiold) { return 'no_func'; } 886: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 887: $xiold=$xi; 888: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 889: # Function value 890: my $funcval=&cubic_hermite($t,@yparms); 891: 892: # Do we already have a value for this point, and is it different from the new one? 893: if ((defined($Apache::functionplotresponse::func[$xi])) && 894: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) { 895: return 'no_func'; 896: } 897: # Okay, remember the new point 898: $Apache::functionplotresponse::func[$xi]=$funcval; 899: 900: if (defined($funcval)) { 901: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 902: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 903: } 904: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 905: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 906: } 907: } 908: # Chain rule 909: # dy/dx=dy/dt/(dx/dt) 910: my $dxdt=&ddt_cubic_hermite($t,@xparms); 911: if ($dxdt) { 912: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 913: # Second derivative 914: $Apache::functionplotresponse::d2funcdx2[$xi]= 915: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 916: ($dxdt*$dxdt*$dxdt); 917: } 918: } 919: } 920: } 921: } 922: } 923: 924: # 925: # Implementation of <functionplotresponse> 926: # 927: 928: sub start_functionplotresponse { 929: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 930: my $result=''; 931: # To remember the splines - somehow, they need to come last 932: undef %Apache::functionplotresponse::splineorder; 933: undef %Apache::functionplotresponse::splineinitx; 934: undef %Apache::functionplotresponse::splineinity; 935: undef %Apache::functionplotresponse::splinescalex; 936: undef %Apache::functionplotresponse::splinescaley; 937: # Remember input fields, etc 938: undef %Apache::functionplotresponse::previous; 939: $Apache::functionplotresponse::inputfields=''; 940: $Apache::functionplotresponse::counter=0; 941: # Remember rules 942: undef @Apache::functionplotresponse::functionplotrules; 943: # Remember failed rules 944: if ($target eq 'grade') { 945: undef @Apache::functionplotresponse::failedrules; 946: } 947: # Delete previous awards 948: undef $Apache::functionplotresponse::awarddetail; 949: # Part and ID 950: my $partid=$Apache::inputtags::part; 951: my $id=&Apache::response::start_response($parstack,$safeeval); 952: # Internal ID to mark the applet and its coordinates 953: my $internalid = $partid.'_'.$id; 954: # Previous answer 955: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 956: 957: # Parameters of <functionplotresponse> 958: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval); 959: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 960: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 961: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 962: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 963: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 964: if ($target eq 'edit') { 965: $result.=&Apache::edit::start_table($token) 966: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 967: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 968: .&Apache::edit::deletelist($target,$token).'   ' 969: .&Apache::edit::insertlist($target,$token).'   ' 970: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses') 971: .'</span></td>' 972: ."<td> " 973: .&Apache::edit::end_row() 974: .&Apache::edit::start_spanning_row() 975: ."\n"; 976: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 977: $token,'6').' '. 978: &Apache::edit::text_arg('Minimum x-value:','xmin', 979: $token,'4').' '. 980: &Apache::edit::text_arg('Maximum x-value:','xmax', 981: $token,'4').' '. 982: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 983: ['yes','no'],$token).'<br />'. 984: &Apache::edit::text_arg('Label y-axis:','ylabel', 985: $token,'6').' '. 986: &Apache::edit::text_arg('Minimum y-value:','ymin', 987: $token,'4').' '. 988: &Apache::edit::text_arg('Maximum y-value:','ymax', 989: $token,'4').' '. 990: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 991: ['yes','no'],$token).'<br />'. 992: &Apache::edit::select_arg('Grid visible:','gridvisible', 993: ['yes','no'],$token).'<br />'. 994: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):', 995: 'answerdisplay',$token,'50'). 996: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 997: } elsif ($target eq 'modified') { 998: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 999: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 1000: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay'); 1001: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 1002: 1003: } elsif ($target eq 'meta') { 1004: $result=&Apache::response::meta_package_write('functionplotresponse'); 1005: } elsif (($target eq 'answer') && 1006: ($env{'form.answer_output_mode'} ne 'tex') && 1007: ($Apache::lonhomework::viewgrades == 'F')) { 1008: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 1009: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen(); 1010: my $start_page = &Apache::loncommon::start_page('Rules Log', undef, 1011: {'only_body' => 1, 1012: 'bgcolor' => '#FFFFFF', 1013: 'js_ready' => 1,}); 1014: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,}); 1015: $uname =~s/\W//g; 1016: $udom =~s/\W//g; 1017: my $function_name = 1018: join('_','LONCAPA_scriptvars',$uname,$udom, 1019: $env{'form.counter'},$Apache::lonxml::curdepth); 1020: my $rules_var ="<script type=\"text/javascript\"> 1021: // <![CDATA[ 1022: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>". 1023: $Apache::functionplotresponse::ruleslog. 1024: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()} 1025: // ]]> 1026: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />"; 1027: &Apache::lonxml::add_script_result($rules_var); 1028: } 1029: 1030: return $result; 1031: } 1032: 1033: sub compare_rel { 1034: my ($relationship,$value,$realval,$tol)=@_; 1035: # is the real value undefined? 1036: unless (defined($realval)) { 1037: # the real value is not defined 1038: if ($relationship eq 'eq') { 1039: if ($value eq 'undef') { 1040: return 1; 1041: } else { 1042: return 0; 1043: } 1044: } elsif ($relationship eq 'ne') { 1045: if ($value eq 'undef') { 1046: return 0; 1047: } else { 1048: return 1; 1049: } 1050: } else { 1051: return 0; 1052: } 1053: } 1054: 1055: # is the expected value undefined? 1056: if ($value eq 'undef') { 1057: # but by now we know that the real value is defined 1058: return 0; 1059: } 1060: 1061: # both are defined. 1062: if ($relationship eq 'gt') { 1063: return ($realval>$value); 1064: } elsif ($relationship eq 'ge') { 1065: return ($realval>$value-$tol); 1066: } elsif ($relationship eq 'lt') { 1067: return ($realval<$value); 1068: } elsif ($relationship eq 'le') { 1069: return ($realval<$value+$tol); 1070: } elsif ($relationship eq 'ne') { 1071: return (abs($value-$realval)>$tol); 1072: } else { 1073: return (abs($value-$realval)<$tol); 1074: } 1075: return 0; 1076: } 1077: 1078: sub addlog { 1079: my ($text)=@_; 1080: $text=~s/\'/\\\'/g; 1081: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 1082: } 1083: 1084: sub actualval { 1085: my ($i,$xmin,$xmax)=@_; 1086: return $xmin+$i/400.*($xmax-$xmin); 1087: } 1088: 1089: sub fpr_val { 1090: my ($arg)=@_; 1091: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg}, 1092: $Apache::functionplotresponse::fpr_xmin, 1093: $Apache::functionplotresponse::fpr_xmax); 1094: } 1095: 1096: sub fpr_f { 1097: my ($arg)=@_; 1098: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin, 1099: $Apache::functionplotresponse::fpr_xmax, 1100: $arg)]; 1101: } 1102: 1103: sub fpr_dfdx { 1104: my ($arg)=@_; 1105: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin, 1106: $Apache::functionplotresponse::fpr_xmax, 1107: $arg)]; 1108: } 1109: 1110: sub fpr_d2fdx2 { 1111: my ($arg)=@_; 1112: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin, 1113: $Apache::functionplotresponse::fpr_xmax, 1114: $arg)]; 1115: } 1116: 1117: sub functionplotrulecheck { 1118: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1119: 1120: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 1121: =split(/\:/,$rule); 1122: $percent=($percent>0?$percent:5); 1123: &addlog("================="); 1124: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value"); 1125: # 1126: # Evaluate the value 1127: # 1128: if ($value=~/\D/) { 1129: $Apache::functionplotresponse::fpr_xmin=$xmin; 1130: $Apache::functionplotresponse::fpr_xmax=$xmax; 1131: $value=&Apache::run::run($value,$safeeval); 1132: &addlog("Value evaluated to $value"); 1133: } 1134: 1135: # 1136: # Minimum and maximum lengths of the interval 1137: # 1138: if ((defined($minimumlength)) || (defined($maximumlength))) { 1139: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength"); 1140: } 1141: my $li=0; 1142: my $lh=400; 1143: 1144: # Special case: the upper boundary was not defined 1145: # and needs to be set to the value where 1146: # the condition is not true anymore => set flag 1147: 1148: my $findupper=0; 1149: if (($xfinal eq '') 1150: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 1151: && ($xfinallabel)) { 1152: $findupper=1; 1153: } 1154: 1155: # if a hard value is set for the boundaries, it overrides the label 1156: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 1157: $li=&array_index($xmin,$xmax,$xinitial); 1158: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 1159: } 1160: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 1161: $lh=&array_index($xmin,$xmax,$xfinal); 1162: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 1163: } 1164: # if the label is defined, use it 1165: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 1166: &addlog("Using lower label $xinitiallabel"); 1167: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 1168: } else { 1169: $li=&array_index($xmin,$xmax,$xinitial); 1170: } 1171: unless ($findupper) { 1172: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 1173: &addlog("Using upper label $xfinallabel"); 1174: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 1175: } else { 1176: $lh=&array_index($xmin,$xmax,$xfinal); 1177: } 1178: } 1179: # Basic sanity checks 1180: if ($li<0) { $li=0; } 1181: if ($lh>400) { $lh=400; } 1182: if (($li>$lh) || (!defined($lh))) { 1183: $lh=$li; 1184: } 1185: 1186: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 1187: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 1188: if ($findupper) { 1189: &addlog("Looking for label $xfinallabel"); 1190: } 1191: my $tol=$percent*($ymax-$ymin)/100; 1192: if ($xmax>$xmin) { 1193: if ($derivative==2) { 1194: $tol=4.*$tol/($xmax-$xmin); 1195: } elsif ($derivative==1) { 1196: $tol=2.*$tol/($xmax-$xmin); 1197: } elsif ($derivative==-1) { 1198: $tol=$tol*($xmax-$xmin)/2.; 1199: } 1200: } 1201: my $integral=0; 1202: my $binwidth=($xmax-$xmin)/400.; 1203: if (($derivative<0) && (!$findupper)) { 1204: # definite integral, calculate over whole length 1205: &addlog("Calculating definite integral"); 1206: for (my $i=$li; $i<=$lh; $i++) { 1207: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1208: } 1209: unless (&compare_rel($relationship,$value,$integral,$tol)) { 1210: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol"); 1211: &addlog("Rule $label failed."); 1212: my $hintlabel=$label; 1213: $hintlabel=~s/^R//; 1214: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1215: &addlog("Set hint condition $hintlabel"); 1216: return 0; 1217: } 1218: } else { 1219: for (my $i=$li; $i<=$lh; $i++) { 1220: my $val; 1221: if ($derivative==2) { 1222: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 1223: } elsif ($derivative==1) { 1224: $val=$Apache::functionplotresponse::dfuncdx[$i]; 1225: } elsif ($derivative==-1) { 1226: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1227: $val=$integral; 1228: } else { 1229: $val=$Apache::functionplotresponse::func[$i]; 1230: } 1231: unless (&compare_rel($relationship,$value,$val,$tol)) { 1232: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 1233: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 1234: if (($findupper) && ($i>$li)) { 1235: # Check lengths 1236: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1237: # Successfully found a new label, set it 1238: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 1239: &addlog("Rule $label passed, setting label $xfinallabel"); 1240: return 1; 1241: } else { 1242: &addlog("Rule $label failed."); 1243: &setfailed($label); 1244: return 0; 1245: } 1246: } 1247: } 1248: } 1249: # Corner case where this makes sense: using start or stop as defined labels 1250: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1251: &addlog("Rule $label passed."); 1252: return 1; 1253: } 1254: 1255: # 1256: # check for minimum and maximum lengths 1257: # 1258: 1259: sub checklength { 1260: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_; 1261: unless (($minimumlength) || ($maximumlength)) { return 1; } 1262: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 1263: if ($minimumlength) { 1264: if ($length<$minimumlength) { 1265: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 1266: &setfailed($label); 1267: return 0; 1268: } 1269: } 1270: if ($maximumlength) { 1271: if ($length>$maximumlength) { 1272: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 1273: &setfailed($label); 1274: return 0; 1275: } 1276: } 1277: return 1; 1278: } 1279: 1280: sub setfailed { 1281: my ($label)=@_; 1282: my $hintlabel=$label; 1283: $hintlabel=~s/^R//; 1284: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1285: &addlog("Set hint condition $hintlabel"); 1286: } 1287: 1288: sub start_functionplotruleset { 1289: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1290: if ($target eq 'edit') { 1291: return &Apache::edit::start_table($token). 1292: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 1293: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1294: .&Apache::edit::deletelist($target,$token).'   '. 1295: &Apache::edit::insertlist($target,$token).'   ' 1296: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules') 1297: .'</span></td>' 1298: ."<td> " 1299: .&Apache::edit::end_row() 1300: .&Apache::edit::start_spanning_row() 1301: ."\n"; 1302: } 1303: } 1304: 1305: sub end_functionplotruleset { 1306: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1307: my $id=$Apache::inputtags::response[-1]; 1308: my $partid=$Apache::inputtags::part; 1309: my $internalid = $partid.'_'.$id; 1310: 1311: if ($target eq 'edit' ) { 1312: return &Apache::edit::end_table(); 1313: } elsif ($target eq 'grade' 1314: && &Apache::response::submitted() 1315: && $Apache::lonhomework::type ne 'exam') { 1316: # 1317: # Actually grade 1318: # 1319: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1320: 1321: my $ad=''; 1322: undef %Apache::functionplotresponse::functionplotrulelabels; 1323: $Apache::functionplotresponse::ruleslog=''; 1324: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 1325: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 1326: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') { 1327: $ad='NOT_FUNCTION'; 1328: } else { 1329: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 1330: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 1331: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1332: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1333: 1334: # We have a function that we can actually grade, go through the spline rules. 1335: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1336: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1337: $ad='INCORRECT'; 1338: last; 1339: } 1340: } 1341: # If it's not wrong, it's correct 1342: unless ($ad) { $ad='EXACT_ANS' }; 1343: } 1344: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1345: &addlog("Assigned award detail: $ad"); 1346: # Store for later to be assigned at end_functionplotresponse 1347: $Apache::functionplotresponse::awarddetail=$ad; 1348: } 1349: } 1350: 1351: 1352: sub end_functionplotresponse { 1353: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1354: &Apache::response::end_response; 1355: 1356: my $result; 1357: my $id=$Apache::inputtags::response[-1]; 1358: my $partid=$Apache::inputtags::part; 1359: my $internalid = $partid.'_'.$id; 1360: 1361: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 1362: if ($target eq 'grade' 1363: && &Apache::response::submitted() 1364: && $Apache::lonhomework::type eq 'exam') { 1365: 1366: &Apache::response::scored_response($partid,$id); 1367: 1368: } elsif ($target eq 'grade' 1369: && &Apache::response::submitted() 1370: && $Apache::lonhomework::type ne 'exam') { 1371: my ($response,%coords)=&get_answer_from_form_fields($internalid); 1372: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 1373: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 1374: # 1375: # Assign grade 1376: # 1377: my $ad=$Apache::functionplotresponse::awarddetail; 1378: # 1379: # Store grading info 1380: # 1381: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 1382: &Apache::response::handle_previous(\%previous,$ad); 1383: } elsif ($target eq 'web') { 1384: undef @Apache::functionplotresponse::failedrules; 1385: } 1386: return $result; 1387: } 1388: 1389: sub end_functionplotelements { 1390: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1391: my $result=''; 1392: my $id=$Apache::inputtags::response[-1]; 1393: my $partid=$Apache::inputtags::part; 1394: my $internalid = $partid.'_'.$id; 1395: if ($target eq 'edit' ) { 1396: $result=&Apache::edit::end_table(); 1397: } elsif ($target eq 'web') { 1398: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1399: 1400: # Are we in show answer mode? 1401: my $showanswer=&Apache::response::show_answer(); 1402: if ($showanswer) { 1403: # Render answerdisplay 1404: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2); 1405: if ($answerdisplay=~/\S/s) { 1406: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) { 1407: my @components=split(/\s*\:\s*/,$plot); 1408: if ($#components<3) { 1409: # Just a simple plot 1410: my ($func,$xl,$xh)=@components; 1411: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; } 1412: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; } 1413: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6); 1414: } else { 1415: # This is a spline 1416: $result.=&answer_spline_script($internalid,@components); 1417: } 1418: } 1419: } 1420: } 1421: my $fixed=0; 1422: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; } 1423: # Now is the time to render all of the stored splines 1424: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1425: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed); 1426: } 1427: # close the init script 1428: $result.=&end_init_script(); 1429: # register all splines in this response 1430: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 1431: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 1432: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1433: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 1434: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 1435: } 1436: # generate the input fields 1437: $result.=$Apache::functionplotresponse::inputfields; 1438: # actually start the <applet>-tag 1439: $result.=&geogebra_startcode($internalid); 1440: # load the spline bytecode 1441: $result.=&geogebra_spline_program(); 1442: # set default parameters 1443: $result.=&geogebra_default_parameters($internalid); 1444: # close the <applet>-tag 1445: $result.=&geogebra_endcode(); 1446: } 1447: return $result; 1448: } 1449: 1450: sub boundaries { 1451: my ($parstack,$safeeval,$level)=@_; 1452: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level); 1453: $xmin=(defined($xmin)?$xmin:-10); 1454: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level); 1455: $xmax=(defined($xmax)?$xmax:10); 1456: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level); 1457: $ymin=(defined($ymin)?$ymin:-10); 1458: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level); 1459: $ymax=(defined($ymax)?$ymax:10); 1460: if ($xmax<=$xmin) { 1461: $xmax=$xmin+20; 1462: } 1463: if ($ymax<=$ymin) { 1464: $ymax=$ymin+20; 1465: } 1466: return ($xmin,$xmax,$ymin,$ymax); 1467: } 1468: 1469: sub start_functionplotelements { 1470: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1471: my $result=''; 1472: my $id=$Apache::inputtags::response[-1]; 1473: my $partid=$Apache::inputtags::part; 1474: my $internalid = $partid.'_'.$id; 1475: 1476: if ($target eq 'edit') { 1477: return &Apache::edit::start_table($token). 1478: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 1479: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1480: .&Apache::edit::deletelist($target,$token).'   '. 1481: &Apache::edit::insertlist($target,$token).'   ' 1482: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements') 1483: .'</span></td>' 1484: ."<td> " 1485: .&Apache::edit::end_row() 1486: .&Apache::edit::start_spanning_row() 1487: ."\n"; 1488: } elsif ($target eq 'web') { 1489: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1490: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1491: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1492: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1493: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 1494: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 1495: 1496: 1497: # paste in the update routine to receive stuff back from the applet 1498: $result.=&update_script($internalid); 1499: # start the initscript for this applet 1500: $result.=&start_init_script($internalid); 1501: # put the axis commands inside 1502: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 1503: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel); 1504: # init script is left open 1505: } 1506: return $result; 1507: } 1508: 1509: 1; 1510: 1511: __END__ 1512: 1513: =head1 NAME 1514: 1515: Apache::functionplotresponse.pm; 1516: 1517: =head1 SYNOPSIS 1518: 1519: Handles tags associated with accepting function plots. 1520: 1521: This is part of the LearningOnline Network with CAPA project 1522: described at http://www.lon-capa.org. 1523: 1524: =head1 HANDLER SUBROUTINE 1525: 1526: start_functionplotresponse() 1527: 1528: =head1 OTHER SUBROUTINES 1529: 1530: =over 1531: 1532: =item end_functionplotresponse() 1533: 1534: =back 1535: 1536: =cut