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File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
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Vector lengths and angles

1: # LearningOnline Network with CAPA 2: # Functionplot responses 3: # 4: # $Id: functionplotresponse.pm,v 1.78 2011/11/20 00:34:52 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','functionplotvectorrule','functionplotvectorsumrule', 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: &generate_input_field($id,$label,$x,$y); 393: return "document.ggbApplet_$id.evalCommand('a=1');\n". 394: "document.ggbApplet_$id.setVisible('a', false);\n". 395: "document.ggbApplet_$id.setLabelVisible('a', false);\n". 396: "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n". 397: "document.ggbApplet_$id.setVisible('$label', true);\n". 398: "document.ggbApplet_$id.setLabelVisible('$label', true);\n"; 399: } 400: 401: # 402: # Subroutine to produce vectors 403: # 404: 405: sub plotvector_script { 406: my ($id,$label,$xs,$ys,$xe,$ye,$xmin,$xmax)=@_; 407: unless ($label) { 408: $Apache::functionplotresponse::counter++; 409: $label='V'.$Apache::functionplotresponse::counter; 410: } 411: my $startlabel=$label.'Start'; 412: my $endlabel=$label.'End'; 413: my $pointlabel=$label.'Point'; 414: my $pointx=2.*($xmax-$xmin)+$xmax; 415: my $anglelabel=$label.'Angle'; 416: return 417: &new_point_coordinate($id,$startlabel,$xs,$ys,0). 418: &new_point_coordinate($id,$endlabel,$xe,$ye,0). 419: (<<ENDVECTOR); 420: document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]"); 421: document.ggbApplet_$id.setLabelVisible("$label",true); 422: document.ggbApplet_$id.setLineThickness("$label",8); 423: document.ggbApplet_$id.evalCommand("$pointlabel=($pointx,y($startlabel))"); 424: document.ggbApplet_$id.evalCommand("$anglelabel=Angle[$pointlabel,$startlabel,$endlabel]"); 425: document.ggbApplet_$id.setLabelVisible("$anglelabel",true); 426: document.ggbApplet_$id.setLabelStyle("$anglelabel",VALUE=2); 427: ENDVECTOR 428: } 429: 430: # 431: # Answer spline display 432: # 433: # points: x,y,slope_x,slope_y 434: 435: sub answer_spline_script { 436: my ($id,@points)=@_; 437: my $order=int(($#points+1)/4); 438: if ($order<2) { $order=2; } 439: if ($order>8) { $order=8; } 440: $Apache::functionplotresponse::counter++; 441: my $label='CSpline'.$Apache::functionplotresponse::counter; 442: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'['; 443: for (my $i=0;$i<=$#points;$i+=4) { 444: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),"; 445: } 446: $output=~s/\,$//; 447: $output.=']");'."\n"; 448: for (my $i=2; $i<2*$order; $i+=2) { 449: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n"; 450: } 451: for (my $i=1; $i<2*$order; $i+=2) { 452: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n"; 453: } 454: 455: return $output; 456: } 457: 458: # 459: # Subroutine that generates code for spline $label based on stored information 460: # 461: 462: sub generate_spline { 463: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 464: my $result=''; 465: my $order=$Apache::functionplotresponse::splineorder{$label}; 466: my $x=$Apache::functionplotresponse::splineinitx{$label}; 467: my $y=$Apache::functionplotresponse::splineinity{$label}; 468: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 469: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 470: my @coords=(); 471: foreach my $i (1..$order) { 472: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed); 473: my $xp=$x; 474: $x+=$sx/(2.*($order-1)); 475: push(@coords,$label.'P'.$i); 476: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed); 477: $x+=$sx/(2.*($order-1)); 478: push(@coords,$label.'S'.$i); 479: } 480: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 481: return $result; 482: } 483: 484: # 485: # Object 486: # 487: 488: sub start_plotobject { 489: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 490: my $result=''; 491: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 492: my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval); 493: my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval); 494: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 495: $label=~s/\W//gs; 496: $label=ucfirst($label); 497: unless ($label) { $label="NewObject"; } 498: if ($target eq 'web') { 499: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 500: unless (defined($x)) { $x=$xmin; } 501: unless (defined($y)) { $y=$ymin; } 502: $result.=&plotobject_script($internalid,$label,$x,$y); 503: } elsif ($target eq 'edit') { 504: $result=&Apache::edit::tag_start($target,$token,'Plot Object'). 505: &Apache::edit::text_arg('Label on Plot:','label', 506: $token,'16'). 507: &Apache::edit::text_arg('x:','x', 508: $token,'8'). 509: &Apache::edit::text_arg('y:','y', 510: $token,'8'). 511: &Apache::edit::end_row(); 512: } elsif ($target eq 'modified') { 513: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')}); 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 $result; 527: } 528: 529: # 530: # Vector 531: # 532: 533: sub start_plotvector { 534: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 535: my $result=''; 536: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 537: my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval); 538: my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval); 539: my $tipx=&Apache::lonxml::get_param('tipx',$parstack,$safeeval); 540: my $tipy=&Apache::lonxml::get_param('tipy',$parstack,$safeeval); 541: 542: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 543: $label=~s/\W//gs; 544: $label=ucfirst($label); 545: unless ($label) { $label="NewVector"; } 546: if ($target eq 'web') { 547: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 548: unless (defined($tailx)) { $tailx=$xmin; } 549: unless (defined($taily)) { $taily=$ymin; } 550: unless (defined($tipx)) { $tipx=$xmin; } 551: unless (defined($tipy)) { $tipy=$ymin; } 552: $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy,$xmin,$xmax); 553: } elsif ($target eq 'edit') { 554: $result=&Apache::edit::tag_start($target,$token,'Plot Vector'). 555: &Apache::edit::text_arg('Label on Plot:','label', 556: $token,'16'). 557: &Apache::edit::text_arg('Tail x:','tailx', 558: $token,'8'). 559: &Apache::edit::text_arg('Tail y:','taily', 560: $token,'8'). 561: &Apache::edit::text_arg('Tip x:','tipx', 562: $token,'8'). 563: &Apache::edit::text_arg('Tip y:','tipy', 564: $token,'8'). 565: 566: &Apache::edit::end_row(); 567: } elsif ($target eq 'modified') { 568: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')}); 569: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','tipx','tipy'); 570: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 571: } 572: return $result; 573: } 574: 575: sub end_plotvector { 576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 577: my $result=''; 578: if ($target eq 'edit') { 579: $result=&Apache::edit::end_table(); 580: } 581: return $result; 582: } 583: 584: 585: 586: # 587: # <backgroundplot function="..." fixed="yes/no" /> 588: # 589: sub start_backgroundplot { 590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 591: my $result=''; 592: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 593: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 594: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval); 595: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval); 596: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 597: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval); 598: $color=~s/[^a-fA-F0-9]//gs; 599: unless (length($color)==6) { $color=''; } 600: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 601: 602: unless ($function) { $function="0"; } 603: if ($target eq 'web') { 604: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 605: unless (defined($xinitial)) { $xinitial=$xmin; } 606: unless (defined($xfinal)) { $xfinal=$xmax; } 607: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal); 608: } elsif ($target eq 'edit') { 609: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 610: &Apache::edit::text_arg('Function:','function', 611: $token,'16'). 612: &Apache::edit::text_arg('Initial x-value (optional):','xinitial', 613: $token,'8'). 614: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 615: $token,'8'). 616: &Apache::edit::text_arg('Label on Plot:','label', 617: $token,'8'). 618: &Apache::edit::text_arg('Color (hex code):','color', 619: $token,'8'). 620: &Apache::edit::select_arg('Fixed location:','fixed', 621: ['yes','no'],$token). 622: &Apache::edit::end_row(); 623: } elsif ($target eq 'modified') { 624: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 625: $safeeval,'function','label','xinitial','xfinal','color','fixed'); 626: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 627: } 628: return $result; 629: } 630: 631: sub end_backgroundplot { 632: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 633: my $result=''; 634: if ($target eq 'edit') { 635: $result=&Apache::edit::end_table(); 636: } 637: return $result; 638: } 639: 640: # 641: # <functionplotrule ... /> 642: # 643: sub start_functionplotrule { 644: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 645: my $result=''; 646: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 647: $Apache::functionplotresponse::counter++; 648: if ($label=~/\W/) { 649: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 650: } 651: $label=~s/\W//gs; 652: unless ($label) { 653: $label='R'.$Apache::functionplotresponse::counter; 654: } else { 655: $label='R'.$label; 656: } 657: if ($Apache::functionplotresponse::splineorder{$label}) { 658: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 659: } 660: 661: 662: if ($target eq 'grade') { 663: # Simply remember - in order - for later 664: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 665: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 666: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 667: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 668: } 669: $beginninglabel=~s/\W//gs; 670: $endinglabel=~s/\W//gs; 671: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 672: $relationship=~s/\W//gs; 673: $relationship=lc($relationship); 674: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 675: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 676: $relationship='eq'; 677: } 678: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 679: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) { 680: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 681: $derivative=0; 682: } 683: push(@Apache::functionplotresponse::functionplotrules,join(':',( 684: $label, 685: $derivative, 686: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 687: $beginninglabel, 688: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 689: $endinglabel, 690: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 691: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 692: $relationship, 693: &Apache::lonxml::get_param('value',$parstack,$safeeval), 694: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 695: ))); 696: } elsif ($target eq 'edit') { 697: $result=&Apache::edit::tag_start($target,$token,'Function Plot Graph Rule'). 698: &Apache::edit::text_arg('Index/Name:','index', 699: $token,'10').' '. 700: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 701: [['0','Function itself'], 702: ['1','First derivative'], 703: ['2','Second derivative'], 704: ['-1','Integral']],$token).'<br />'. 705: &Apache::edit::text_arg('Initial x-value:','xinitial', 706: $token,'8'). 707: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel', 708: [['start','Start of Plot'], 709: ['end','End of Plot']],$token,'8').'<br />'. 710: 711: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 712: $token,'8'). 713: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel', 714: [['end','End of Plot']],$token,'8').'<br />'. 715: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength', 716: $token,'8'). 717: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength', 718: $token,'8').'<br />'. 719: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship', 720: [['eq','equal'], 721: ['ne','not equal'], 722: ['ge','greater than or equal'], 723: ['gt','greater than'], 724: ['lt','less than'], 725: ['le','less than or equal']],$token). 726: $result.= &Apache::edit::select_or_text_arg('Value:','value', 727: [['undef','not defined']],$token,'30'). 728: &Apache::edit::text_arg('Percent error:','percenterror', 729: $token,'8'). 730: &Apache::edit::end_row(); 731: } elsif ($target eq 'modified') { 732: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) { 733: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}=''; 734: } 735: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) { 736: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}=''; 737: } 738: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 739: $safeeval,'index','derivativeorder', 740: 'xinitial','xinitiallabel','xfinal','xfinallabel', 741: 'minimumlength','maximumlength', 742: 'relationship','value','percenterror'); 743: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 744: } 745: return $result; 746: } 747: 748: sub end_functionplotrule { 749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 750: my $result=''; 751: if ($target eq 'edit') { 752: $result=&Apache::edit::end_table(); 753: } 754: return $result; 755: } 756: 757: 758: # 759: # <functionplotvectorrule ... /> 760: # 761: sub start_functionplotvectorrule { 762: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 763: my $result=''; 764: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 765: $Apache::functionplotresponse::counter++; 766: if ($label=~/\W/) { 767: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 768: } 769: $label=~s/\W//gs; 770: unless ($label) { 771: $label='V'.$Apache::functionplotresponse::counter; 772: } else { 773: $label='V'.$label; 774: } 775: if ($Apache::functionplotresponse::splineorder{$label}) { 776: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 777: } 778: 779: if ($target eq 'grade') { 780: # Simply remember - in order - for later 781: 782: my $id=$Apache::inputtags::response[-1]; 783: my $partid=$Apache::inputtags::part; 784: my $internalid = $partid.'_'.$id; 785: 786: my $vector=&Apache::lonxml::get_param('vector',$parstack,$safeeval); 787: $vector=~s/\W//gs; 788: $vector=ucfirst($vector); 789: 790: my $attachpoint=&Apache::lonxml::get_param('attachpoint',$parstack,$safeeval); 791: $attachpoint=~s/\W//gs; 792: $attachpoint=ucfirst($attachpoint); 793: 794: my $notattachpoint=&Apache::lonxml::get_param('notattachpoint',$parstack,$safeeval); 795: $notattachpoint=~s/\W//gs; 796: $notattachpoint=ucfirst($notattachpoint); 797: 798: my $tailpoint=&Apache::lonxml::get_param('tailpoint',$parstack,$safeeval); 799: $tailpoint=~s/\W//gs; 800: $tailpoint=ucfirst($tailpoint); 801: my $tippoint=&Apache::lonxml::get_param('tippoint',$parstack,$safeeval); 802: $tippoint=~s/\W//gs; 803: $tippoint=ucfirst($tippoint); 804: 805: my $nottailpoint=&Apache::lonxml::get_param('nottailpoint',$parstack,$safeeval); 806: $nottailpoint=~s/\W//gs; 807: $nottailpoint=ucfirst($nottailpoint); 808: my $nottippoint=&Apache::lonxml::get_param('nottippoint',$parstack,$safeeval); 809: $nottippoint=~s/\W//gs; 810: $nottippoint=ucfirst($nottippoint); 811: 812: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',( 813: $label, 814: 'vector', 815: $internalid, 816: $vector, 817: $attachpoint, 818: $notattachpoint, 819: $tailpoint, 820: $tippoint, 821: $nottailpoint, 822: $nottippoint, 823: &Apache::lonxml::get_param('length',$parstack,$safeeval), 824: &Apache::lonxml::get_param('angle',$parstack,$safeeval), 825: &Apache::lonxml::get_param('lengthpercenterror',$parstack,$safeeval), 826: &Apache::lonxml::get_param('anglepercenterror',$parstack,$safeeval), 827: ))); 828: } elsif ($target eq 'edit') { 829: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Rule'). 830: &Apache::edit::text_arg('Index/Name:','index', 831: $token,'10').' '. 832: &Apache::edit::text_arg('Vector:','vector', 833: $token,'16').'<br />'. 834: &Apache::edit::text_arg('Attached to object:','attachpoint', 835: $token,'16'). 836: &Apache::edit::text_arg('Not attached to object:','notattachpoint', 837: $token,'16').'<br />'. 838: &Apache::edit::text_arg('Tail attached to object:','tailpoint', 839: $token,'16'). 840: &Apache::edit::text_arg('Tip attached to object:','tippoint', 841: $token,'16'). 842: &Apache::edit::text_arg('Tail not attached to object:','nottailpoint', 843: $token,'16'). 844: &Apache::edit::text_arg('Tip not attached to object:','nottippoint', 845: $token,'16').'<br />'. 846: &Apache::edit::text_arg('Length:','length', 847: $token,'16'). 848: &Apache::edit::text_arg('Angle:','angle', 849: $token,'16'). 850: &Apache::edit::text_arg('Percent error length:','lengthpercenterror', 851: $token,'8'). 852: &Apache::edit::text_arg('Percent error angle:','anglepercenterror', 853: $token,'8'). 854: &Apache::edit::end_row(); 855: } elsif ($target eq 'modified') { 856: $env{'form.'.&Apache::edit::html_element_name('vector')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('vector')}); 857: $env{'form.'.&Apache::edit::html_element_name('attachpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('attachpoint')}); 858: $env{'form.'.&Apache::edit::html_element_name('notattachpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('notattachpoint')}); 859: $env{'form.'.&Apache::edit::html_element_name('tailpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('tailpoint')}); 860: $env{'form.'.&Apache::edit::html_element_name('tippoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('tippoint')}); 861: $env{'form.'.&Apache::edit::html_element_name('nottailpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('nottailpoint')}); 862: $env{'form.'.&Apache::edit::html_element_name('nottippoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('nottippoint')}); 863: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 864: $safeeval,'index','vector','attachpoint','notattachpoint', 865: 'tailpoint','tippoint','nottailpoint','nottipoint', 866: 'length','angle', 867: 'lengthpercenterror','anglepercenterror'); 868: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 869: } 870: return $result; 871: } 872: 873: sub end_functionplotvectorrule { 874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 875: my $result=''; 876: if ($target eq 'edit') { 877: $result=&Apache::edit::end_table(); 878: } 879: return $result; 880: } 881: 882: # 883: # <functionplotvectorsumrule ... /> 884: # 885: sub start_functionplotvectorsumrule { 886: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 887: my $result=''; 888: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 889: $Apache::functionplotresponse::counter++; 890: if ($label=~/\W/) { 891: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 892: } 893: $label=~s/\W//gs; 894: unless ($label) { 895: $label='V'.$Apache::functionplotresponse::counter; 896: } else { 897: $label='V'.$label; 898: } 899: if ($Apache::functionplotresponse::splineorder{$label}) { 900: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 901: } 902: if ($target eq 'grade') { 903: # Simply remember - in order - for later 904: my $id=$Apache::inputtags::response[-1]; 905: my $partid=$Apache::inputtags::part; 906: my $internalid = $partid.'_'.$id; 907: my $object=&Apache::lonxml::get_param('object',$parstack,$safeeval); 908: $object=~s/\W//gs; 909: $object=ucfirst($object); 910: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',( 911: $label, 912: 'sum', 913: $internalid, 914: $object, 915: &Apache::lonxml::get_param('length',$parstack,$safeeval), 916: &Apache::lonxml::get_param('angle',$parstack,$safeeval), 917: &Apache::lonxml::get_param('lengthpercenterror',$parstack,$safeeval), 918: &Apache::lonxml::get_param('lengthabserror',$parstack,$safeeval), 919: &Apache::lonxml::get_param('anglepercenterror',$parstack,$safeeval), 920: ))); 921: } elsif ($target eq 'edit') { 922: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Sum Rule'). 923: &Apache::edit::text_arg('Index/Name:','index', 924: $token,'10').' '. 925: &Apache::edit::text_arg('Vectors attached to object:','object', 926: $token,'16').'<br />'. 927: &Apache::edit::text_arg('Sum vector length:','length', 928: $token,'16'). 929: &Apache::edit::text_arg('Sum vector angle:','angle', 930: $token,'16'). 931: &Apache::edit::text_arg('Percent error length:','lengthpercenterror', 932: $token,'8'). 933: &Apache::edit::text_arg('Absolute error length:','lengthabserror', 934: $token,'8'). 935: &Apache::edit::text_arg('Percent error angle:','anglepercenterror', 936: $token,'8'). 937: &Apache::edit::end_row(); 938: } elsif ($target eq 'modified') { 939: $env{'form.'.&Apache::edit::html_element_name('object')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('object')}); 940: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 941: $safeeval,'index','object', 942: 'length','angle', 943: 'lengthpercenterror','lengthabserror','anglepercenterror'); 944: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 945: } 946: return $result; 947: } 948: 949: sub end_functionplotvectorsumrule { 950: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 951: my $result=''; 952: if ($target eq 'edit') { 953: $result=&Apache::edit::end_table(); 954: } 955: return $result; 956: } 957: 958: # 959: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 960: # 961: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 962: # 963: sub start_spline { 964: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 965: my $result=''; 966: if ($target eq 'web') { 967: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 968: $Apache::functionplotresponse::counter++; 969: if ($label=~/\W/) { 970: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 971: } 972: $label=~s/\W//gs; 973: unless ($label) { 974: $label='S'.$Apache::functionplotresponse::counter; 975: } else { 976: $label='S'.$label; 977: } 978: if ($Apache::functionplotresponse::splineorder{$label}) { 979: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 980: } 981: 982: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 983: if ($order<2) { $order=2; } 984: if ($order>8) { $order=8; } 985: $Apache::functionplotresponse::splineorder{$label}=$order; 986: 987: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 988: unless ($x) { $x=0; } 989: $Apache::functionplotresponse::splineinitx{$label}=$x; 990: 991: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 992: unless ($y) { $y=0; } 993: $Apache::functionplotresponse::splineinity{$label}=$y; 994: 995: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 996: unless ($sx) { $sx=$order; } 997: $Apache::functionplotresponse::splinescalex{$label}=$sx; 998: 999: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 1000: unless ($sy) { $sy=2; } 1001: $Apache::functionplotresponse::splinescaley{$label}=$sy; 1002: } elsif ($target eq 'edit') { 1003: $result=&Apache::edit::tag_start($target,$token,'Spline'). 1004: &Apache::edit::text_arg('Index:','index', 1005: $token,'4').' '. 1006: &Apache::edit::select_arg('Order:','order', 1007: ['2','3','4','5','6','7','8'],$token).' '. 1008: &Apache::edit::text_arg('Initial x-value:','initx', 1009: $token,'4').' '. 1010: &Apache::edit::text_arg('Initial y-value:','inity', 1011: $token,'4').' '. 1012: &Apache::edit::text_arg('Scale x:','scalex', 1013: $token,'4').' '. 1014: &Apache::edit::text_arg('Scale y:','scaley', 1015: $token,'4'). 1016: &Apache::edit::end_row(); 1017: } elsif ($target eq 'modified') { 1018: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 1019: $safeeval,'index','order','initx','inity', 1020: 'scalex','scaley'); 1021: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 1022: } 1023: return $result; 1024: } 1025: 1026: sub end_spline { 1027: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1028: my $result=''; 1029: if ($target eq 'edit') { 1030: $result=&Apache::edit::end_table(); 1031: } 1032: return $result; 1033: } 1034: 1035: sub end_init_script { 1036: return (<<ENDENDINIT); 1037: } 1038: // ]]> 1039: </script> 1040: ENDENDINIT 1041: } 1042: 1043: # 1044: # Storing and restoring spline coordinates from part answers 1045: # 1046: sub decode_previous_answer { 1047: my ($answer)=@_; 1048: foreach my $coordinate (split(/\,/,$answer)) { 1049: my ($key,$value)=split(/\=/,$coordinate); 1050: $Apache::functionplotresponse::previous{$key}=$value; 1051: } 1052: } 1053: 1054: sub get_answer_from_form_fields { 1055: my ($id)=@_; 1056: my $answer=''; 1057: my %coords=(); 1058: foreach my $field (keys(%env)) { 1059: if ($field=~/^form\.HWVAL\_$id/) { 1060: $field=~/^form\.(.*)$/; 1061: $coords{$1}=$env{$field}; 1062: } 1063: } 1064: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 1065: return ($answer,%coords); 1066: } 1067: 1068: # 1069: # The following functions calculate the cubic-hermite splines server-side 1070: # 1071: 1072: sub cubic_hermite { 1073: my ($t,$p1,$s1,$p2,$s2)=@_; 1074: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 1075: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2); 1076: } 1077: 1078: # 1079: # d/dt(...) 1080: # 1081: 1082: sub ddt_cubic_hermite { 1083: my ($t,$p1,$s1,$p2,$s2)=@_; 1084: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 1085: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2); 1086: } 1087: 1088: # 1089: # d^2/dt^2(...) 1090: # 1091: 1092: sub d2dt2_cubic_hermite { 1093: my ($t,$p1,$s1,$p2,$s2)=@_; 1094: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+ 1095: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2); 1096: } 1097: 1098: # 1099: # Array index calculation 1100: # 1101: sub array_index { 1102: my ($xmin,$xmax,$x)=@_; 1103: if ($x ne '') { 1104: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 1105: } else { 1106: return undef; 1107: } 1108: } 1109: 1110: # 1111: # Populate the arrays 1112: # 1113: 1114: sub populate_arrays { 1115: my ($id,$xmin,$xmax,$ymin,$ymax)=@_; 1116: for (my $i=0; $i<=400; $i++) { 1117: $Apache::functionplotresponse::actualxval[$i]=undef; 1118: $Apache::functionplotresponse::func[$i]=undef; 1119: $Apache::functionplotresponse::dfuncdx[$i]=undef; 1120: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 1121: } 1122: unless ($xmax>$xmin) { return 'no_func'; } 1123: # Run over all splines in response 1124: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 1125: my $xiold=-1; 1126: # Run over all points in spline 1127: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 1128: my $ni=$i+1; 1129: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 1130: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 1131: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 1132: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 1133: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 1134: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 1135: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 1136: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 1137: # Run in small steps over spline parameter 1138: for (my $t=0; $t<=1; $t+=0.0001) { 1139: my $xreal=&cubic_hermite($t,@xparms); 1140: my $xi=&array_index($xmin,$xmax,$xreal); 1141: if ($xi<$xiold) { return 'no_func'; } 1142: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 1143: $xiold=$xi; 1144: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 1145: # Function value 1146: my $funcval=&cubic_hermite($t,@yparms); 1147: 1148: # Do we already have a value for this point, and is it different from the new one? 1149: if ((defined($Apache::functionplotresponse::func[$xi])) && 1150: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) { 1151: return 'no_func'; 1152: } 1153: # Okay, remember the new point 1154: $Apache::functionplotresponse::func[$xi]=$funcval; 1155: 1156: if (defined($funcval)) { 1157: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 1158: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 1159: } 1160: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 1161: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 1162: } 1163: } 1164: # Chain rule 1165: # dy/dx=dy/dt/(dx/dt) 1166: my $dxdt=&ddt_cubic_hermite($t,@xparms); 1167: if ($dxdt) { 1168: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 1169: # Second derivative 1170: $Apache::functionplotresponse::d2funcdx2[$xi]= 1171: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 1172: ($dxdt*$dxdt*$dxdt); 1173: } 1174: } 1175: } 1176: } 1177: } 1178: } 1179: 1180: # 1181: # Implementation of <functionplotresponse> 1182: # 1183: 1184: sub start_functionplotresponse { 1185: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1186: my $result=''; 1187: # To remember the splines - somehow, they need to come last 1188: undef %Apache::functionplotresponse::splineorder; 1189: undef %Apache::functionplotresponse::splineinitx; 1190: undef %Apache::functionplotresponse::splineinity; 1191: undef %Apache::functionplotresponse::splinescalex; 1192: undef %Apache::functionplotresponse::splinescaley; 1193: # Remember input fields, etc 1194: undef %Apache::functionplotresponse::previous; 1195: $Apache::functionplotresponse::inputfields=''; 1196: $Apache::functionplotresponse::counter=0; 1197: # Remember rules 1198: undef @Apache::functionplotresponse::functionplotrules; 1199: undef @Apache::functionplotresponse::functionplotvectorrules; 1200: # Remember failed rules 1201: if ($target eq 'grade') { 1202: undef @Apache::functionplotresponse::failedrules; 1203: } 1204: # Delete previous awards 1205: undef $Apache::functionplotresponse::awarddetail; 1206: # Part and ID 1207: my $partid=$Apache::inputtags::part; 1208: my $id=&Apache::response::start_response($parstack,$safeeval); 1209: # Internal ID to mark the applet and its coordinates 1210: my $internalid = $partid.'_'.$id; 1211: # Previous answer 1212: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 1213: 1214: # Parameters of <functionplotresponse> 1215: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval); 1216: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 1217: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 1218: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 1219: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 1220: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 1221: if ($target eq 'edit') { 1222: $result.=&Apache::edit::start_table($token) 1223: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 1224: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1225: .&Apache::edit::deletelist($target,$token).'   ' 1226: .&Apache::edit::insertlist($target,$token).'   ' 1227: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses') 1228: .'</span></td>' 1229: ."<td> " 1230: .&Apache::edit::end_row() 1231: .&Apache::edit::start_spanning_row() 1232: ."\n"; 1233: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 1234: $token,'6').' '. 1235: &Apache::edit::text_arg('Minimum x-value:','xmin', 1236: $token,'4').' '. 1237: &Apache::edit::text_arg('Maximum x-value:','xmax', 1238: $token,'4').' '. 1239: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 1240: ['yes','no'],$token).'<br />'. 1241: &Apache::edit::text_arg('Label y-axis:','ylabel', 1242: $token,'6').' '. 1243: &Apache::edit::text_arg('Minimum y-value:','ymin', 1244: $token,'4').' '. 1245: &Apache::edit::text_arg('Maximum y-value:','ymax', 1246: $token,'4').' '. 1247: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 1248: ['yes','no'],$token).'<br />'. 1249: &Apache::edit::select_arg('Grid visible:','gridvisible', 1250: ['yes','no'],$token).'<br />'. 1251: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):', 1252: 'answerdisplay',$token,'50'). 1253: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 1254: } elsif ($target eq 'modified') { 1255: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 1256: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 1257: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay'); 1258: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 1259: 1260: } elsif ($target eq 'meta') { 1261: $result=&Apache::response::meta_package_write('functionplotresponse'); 1262: } elsif (($target eq 'answer') && 1263: ($env{'form.answer_output_mode'} ne 'tex') && 1264: ($Apache::lonhomework::viewgrades == 'F')) { 1265: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 1266: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen(); 1267: my $start_page = &Apache::loncommon::start_page('Rules Log', undef, 1268: {'only_body' => 1, 1269: 'bgcolor' => '#FFFFFF', 1270: 'js_ready' => 1,}); 1271: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,}); 1272: $uname =~s/\W//g; 1273: $udom =~s/\W//g; 1274: my $function_name = 1275: join('_','LONCAPA_scriptvars',$uname,$udom, 1276: $env{'form.counter'},$Apache::lonxml::curdepth); 1277: my $rules_var ="<script type=\"text/javascript\"> 1278: // <![CDATA[ 1279: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>". 1280: $Apache::functionplotresponse::ruleslog. 1281: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()} 1282: // ]]> 1283: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />"; 1284: &Apache::lonxml::add_script_result($rules_var); 1285: } 1286: 1287: return $result; 1288: } 1289: 1290: sub compare_rel { 1291: my ($relationship,$value,$realval,$tol)=@_; 1292: # is the real value undefined? 1293: unless (defined($realval)) { 1294: # the real value is not defined 1295: if ($relationship eq 'eq') { 1296: if ($value eq 'undef') { 1297: return 1; 1298: } else { 1299: return 0; 1300: } 1301: } elsif ($relationship eq 'ne') { 1302: if ($value eq 'undef') { 1303: return 0; 1304: } else { 1305: return 1; 1306: } 1307: } else { 1308: return 0; 1309: } 1310: } 1311: 1312: # is the expected value undefined? 1313: if ($value eq 'undef') { 1314: # but by now we know that the real value is defined 1315: return 0; 1316: } 1317: 1318: # both are defined. 1319: if ($relationship eq 'gt') { 1320: return ($realval>$value); 1321: } elsif ($relationship eq 'ge') { 1322: return ($realval>$value-$tol); 1323: } elsif ($relationship eq 'lt') { 1324: return ($realval<$value); 1325: } elsif ($relationship eq 'le') { 1326: return ($realval<$value+$tol); 1327: } elsif ($relationship eq 'ne') { 1328: return (abs($value-$realval)>$tol); 1329: } else { 1330: return (abs($value-$realval)<$tol); 1331: } 1332: return 0; 1333: } 1334: 1335: sub addlog { 1336: my ($text)=@_; 1337: $text=~s/\'/\\\'/g; 1338: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 1339: } 1340: 1341: sub actualval { 1342: my ($i,$xmin,$xmax)=@_; 1343: return $xmin+$i/400.*($xmax-$xmin); 1344: } 1345: 1346: sub fpr_val { 1347: my ($arg)=@_; 1348: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg}, 1349: $Apache::functionplotresponse::fpr_xmin, 1350: $Apache::functionplotresponse::fpr_xmax); 1351: } 1352: 1353: sub fpr_f { 1354: my ($arg)=@_; 1355: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin, 1356: $Apache::functionplotresponse::fpr_xmax, 1357: $arg)]; 1358: } 1359: 1360: sub fpr_dfdx { 1361: my ($arg)=@_; 1362: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin, 1363: $Apache::functionplotresponse::fpr_xmax, 1364: $arg)]; 1365: } 1366: 1367: sub fpr_d2fdx2 { 1368: my ($arg)=@_; 1369: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin, 1370: $Apache::functionplotresponse::fpr_xmax, 1371: $arg)]; 1372: } 1373: 1374: 1375: sub vectorcoords { 1376: my ($id,$label)=@_; 1377: return ($env{'form.HWVAL_'.$id.'_'.$label.'Start_x'}, 1378: $env{'form.HWVAL_'.$id.'_'.$label.'End_x'}, 1379: $env{'form.HWVAL_'.$id.'_'.$label.'Start_y'}, 1380: $env{'form.HWVAL_'.$id.'_'.$label.'End_y'}); 1381: } 1382: 1383: sub objectcoords { 1384: my ($id,$label)=@_; 1385: return ($env{'form.HWVAL_'.$id.'_'.$label.'_x'}, 1386: $env{'form.HWVAL_'.$id.'_'.$label.'_y'}); 1387: } 1388: 1389: sub vectorangle { 1390: my ($x,$y)=@_; 1391: my $angle=57.2957795*atan2($y,$x); 1392: if ($angle<0) { $angle=360+$angle; } 1393: return $angle; 1394: } 1395: 1396: sub vectorlength { 1397: my ($x,$y)=@_; 1398: return sqrt($x*$x+$y*$y); 1399: } 1400: 1401: sub relvector { 1402: my ($xs,$xe,$ys,$ye)=@_; 1403: return ($xe-$xs,$ye-$ys); 1404: } 1405: 1406: sub plotvectorlength { 1407: return &vectorlength(&relvector(&vectorcoords(@_))); 1408: } 1409: 1410: sub plotvectorangle { 1411: return &vectorangle(&relvector(&vectorcoords(@_))); 1412: } 1413: 1414: 1415: # 1416: # Evaluate a functionplotvectorrule 1417: # 1418: 1419: sub functionplotvectorrulecheck { 1420: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1421: &addlog("================="); 1422: my ($label,$type)=split(/\:/,$rule); 1423: if ($type eq 'vector') { 1424: return &vectorcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval); 1425: } elsif ($type eq 'sum') { 1426: return &sumcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval); 1427: } 1428: } 1429: 1430: sub vectorcheck { 1431: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1432: my ($label,$type,$id,$vector, 1433: $attachpoint,$notattachpoint, 1434: $tailpoint,$tippoint,$nottailpoint,$nottippoint, 1435: $length,$angle,$lengthpercenterror,$anglepercenterror)=split(/\:/,$rule); 1436: &addlog("Vector Rule $label for vector ".$vector); 1437: 1438: } 1439: 1440: sub sumcheck { 1441: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1442: my ($label,$type,$id,$object,$length,$angle,$lengthpercenterror,$lengthabserror,$anglepercenterror)=split(/\:/,$rule); 1443: &addlog("Vector Sum Rule $label for vectors attached to ".$object); 1444: } 1445: 1446: # 1447: # Evaluate a functionplotrule 1448: # 1449: 1450: sub functionplotrulecheck { 1451: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1452: 1453: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 1454: =split(/\:/,$rule); 1455: $percent=($percent>0?$percent:5); 1456: &addlog("================="); 1457: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value"); 1458: # 1459: # Evaluate the value 1460: # 1461: if ($value=~/\D/) { 1462: $Apache::functionplotresponse::fpr_xmin=$xmin; 1463: $Apache::functionplotresponse::fpr_xmax=$xmax; 1464: $value=&Apache::run::run($value,$safeeval); 1465: &addlog("Value evaluated to $value"); 1466: } 1467: 1468: # 1469: # Minimum and maximum lengths of the interval 1470: # 1471: if ((defined($minimumlength)) || (defined($maximumlength))) { 1472: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength"); 1473: } 1474: my $li=0; 1475: my $lh=400; 1476: 1477: # Special case: the upper boundary was not defined 1478: # and needs to be set to the value where 1479: # the condition is not true anymore => set flag 1480: 1481: my $findupper=0; 1482: if (($xfinal eq '') 1483: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 1484: && ($xfinallabel)) { 1485: $findupper=1; 1486: } 1487: 1488: # if a hard value is set for the boundaries, it overrides the label 1489: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 1490: $li=&array_index($xmin,$xmax,$xinitial); 1491: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 1492: } 1493: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 1494: $lh=&array_index($xmin,$xmax,$xfinal); 1495: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 1496: } 1497: # if the label is defined, use it 1498: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 1499: &addlog("Using lower label $xinitiallabel"); 1500: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 1501: } else { 1502: $li=&array_index($xmin,$xmax,$xinitial); 1503: } 1504: unless ($findupper) { 1505: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 1506: &addlog("Using upper label $xfinallabel"); 1507: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 1508: } else { 1509: $lh=&array_index($xmin,$xmax,$xfinal); 1510: } 1511: } 1512: # Basic sanity checks 1513: if ($li<0) { $li=0; } 1514: if ($lh>400) { $lh=400; } 1515: if (($li>$lh) || (!defined($lh))) { 1516: $lh=$li; 1517: } 1518: 1519: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 1520: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 1521: if ($findupper) { 1522: &addlog("Looking for label $xfinallabel"); 1523: } 1524: my $tol=$percent*($ymax-$ymin)/100; 1525: if ($xmax>$xmin) { 1526: if ($derivative==2) { 1527: $tol=4.*$tol/($xmax-$xmin); 1528: } elsif ($derivative==1) { 1529: $tol=2.*$tol/($xmax-$xmin); 1530: } elsif ($derivative==-1) { 1531: $tol=$tol*($xmax-$xmin)/2.; 1532: } 1533: } 1534: my $integral=0; 1535: my $binwidth=($xmax-$xmin)/400.; 1536: if (($derivative<0) && (!$findupper)) { 1537: # definite integral, calculate over whole length 1538: &addlog("Calculating definite integral"); 1539: for (my $i=$li; $i<=$lh; $i++) { 1540: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1541: } 1542: unless (&compare_rel($relationship,$value,$integral,$tol)) { 1543: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol"); 1544: &addlog("Rule $label failed."); 1545: my $hintlabel=$label; 1546: $hintlabel=~s/^R//; 1547: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1548: &addlog("Set hint condition $hintlabel"); 1549: return 0; 1550: } 1551: } else { 1552: for (my $i=$li; $i<=$lh; $i++) { 1553: my $val; 1554: if ($derivative==2) { 1555: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 1556: } elsif ($derivative==1) { 1557: $val=$Apache::functionplotresponse::dfuncdx[$i]; 1558: } elsif ($derivative==-1) { 1559: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1560: $val=$integral; 1561: } else { 1562: $val=$Apache::functionplotresponse::func[$i]; 1563: } 1564: unless (&compare_rel($relationship,$value,$val,$tol)) { 1565: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 1566: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 1567: if (($findupper) && ($i>$li)) { 1568: # Check lengths 1569: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1570: # Successfully found a new label, set it 1571: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 1572: &addlog("Rule $label passed, setting label $xfinallabel"); 1573: return 1; 1574: } else { 1575: &addlog("Rule $label failed."); 1576: &setfailed($label); 1577: return 0; 1578: } 1579: } 1580: } 1581: } 1582: # Corner case where this makes sense: using start or stop as defined labels 1583: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1584: &addlog("Rule $label passed."); 1585: return 1; 1586: } 1587: 1588: # 1589: # check for minimum and maximum lengths 1590: # 1591: 1592: sub checklength { 1593: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_; 1594: unless (($minimumlength) || ($maximumlength)) { return 1; } 1595: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 1596: if ($minimumlength) { 1597: if ($length<$minimumlength) { 1598: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 1599: &setfailed($label); 1600: return 0; 1601: } 1602: } 1603: if ($maximumlength) { 1604: if ($length>$maximumlength) { 1605: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 1606: &setfailed($label); 1607: return 0; 1608: } 1609: } 1610: return 1; 1611: } 1612: 1613: sub setfailed { 1614: my ($label)=@_; 1615: my $hintlabel=$label; 1616: $hintlabel=~s/^R//; 1617: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1618: &addlog("Set hint condition $hintlabel"); 1619: } 1620: 1621: sub start_functionplotruleset { 1622: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1623: if ($target eq 'edit') { 1624: return &Apache::edit::start_table($token). 1625: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 1626: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1627: .&Apache::edit::deletelist($target,$token).'   '. 1628: &Apache::edit::insertlist($target,$token).'   ' 1629: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules') 1630: .'</span></td>' 1631: ."<td> " 1632: .&Apache::edit::end_row() 1633: .&Apache::edit::start_spanning_row() 1634: ."\n"; 1635: } 1636: } 1637: 1638: sub end_functionplotruleset { 1639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1640: my $id=$Apache::inputtags::response[-1]; 1641: my $partid=$Apache::inputtags::part; 1642: my $internalid = $partid.'_'.$id; 1643: 1644: if ($target eq 'edit' ) { 1645: return &Apache::edit::end_table(); 1646: } elsif ($target eq 'grade' 1647: && &Apache::response::submitted() 1648: && $Apache::lonhomework::type ne 'exam') { 1649: # 1650: # Actually grade 1651: # 1652: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1653: 1654: my $ad=''; 1655: undef %Apache::functionplotresponse::functionplotrulelabels; 1656: $Apache::functionplotresponse::ruleslog=''; 1657: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 1658: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 1659: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') { 1660: $ad='NOT_FUNCTION'; 1661: } else { 1662: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 1663: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 1664: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1665: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1666: 1667: # We have a function that we can actually grade, go through the spline rules. 1668: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1669: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1670: $ad='INCORRECT'; 1671: last; 1672: } 1673: } 1674: # And now go through the vector rules 1675: foreach my $rule (@Apache::functionplotresponse::functionplotvectorrules) { 1676: unless (&functionplotvectorrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1677: $ad='INCORRECT'; 1678: last; 1679: } 1680: } 1681: # If it's not wrong, it's correct 1682: unless ($ad) { $ad='EXACT_ANS' }; 1683: } 1684: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1685: &addlog("Assigned award detail: $ad"); 1686: # Store for later to be assigned at end_functionplotresponse 1687: $Apache::functionplotresponse::awarddetail=$ad; 1688: } 1689: } 1690: 1691: 1692: sub end_functionplotresponse { 1693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1694: &Apache::response::end_response; 1695: 1696: my $result; 1697: my $id=$Apache::inputtags::response[-1]; 1698: my $partid=$Apache::inputtags::part; 1699: my $internalid = $partid.'_'.$id; 1700: 1701: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 1702: if ($target eq 'grade' 1703: && &Apache::response::submitted() 1704: && $Apache::lonhomework::type eq 'exam') { 1705: 1706: &Apache::response::scored_response($partid,$id); 1707: 1708: } elsif ($target eq 'grade' 1709: && &Apache::response::submitted() 1710: && $Apache::lonhomework::type ne 'exam') { 1711: my ($response,%coords)=&get_answer_from_form_fields($internalid); 1712: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 1713: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 1714: # 1715: # Assign grade 1716: # 1717: my $ad=$Apache::functionplotresponse::awarddetail; 1718: # 1719: # Store grading info 1720: # 1721: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 1722: &Apache::response::handle_previous(\%previous,$ad); 1723: } elsif ($target eq 'web') { 1724: undef @Apache::functionplotresponse::failedrules; 1725: } 1726: return $result; 1727: } 1728: 1729: sub end_functionplotelements { 1730: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1731: my $result=''; 1732: my $id=$Apache::inputtags::response[-1]; 1733: my $partid=$Apache::inputtags::part; 1734: my $internalid = $partid.'_'.$id; 1735: if ($target eq 'edit' ) { 1736: $result=&Apache::edit::end_table(); 1737: } elsif ($target eq 'web') { 1738: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1739: 1740: # Are we in show answer mode? 1741: my $showanswer=&Apache::response::show_answer(); 1742: if ($showanswer) { 1743: # Render answerdisplay 1744: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2); 1745: if ($answerdisplay=~/\S/s) { 1746: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) { 1747: my @components=split(/\s*\:\s*/,$plot); 1748: if ($#components<3) { 1749: # Just a simple plot 1750: my ($func,$xl,$xh)=@components; 1751: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; } 1752: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; } 1753: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6); 1754: } else { 1755: # This is a spline 1756: $result.=&answer_spline_script($internalid,@components); 1757: } 1758: } 1759: } 1760: } 1761: my $fixed=0; 1762: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; } 1763: # Now is the time to render all of the stored splines 1764: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1765: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed); 1766: } 1767: # close the init script 1768: $result.=&end_init_script(); 1769: # register all splines in this response 1770: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 1771: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 1772: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1773: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 1774: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 1775: } 1776: # generate the input fields 1777: $result.=$Apache::functionplotresponse::inputfields; 1778: # actually start the <applet>-tag 1779: $result.=&geogebra_startcode($internalid); 1780: # load the spline bytecode 1781: $result.=&geogebra_spline_program(); 1782: # set default parameters 1783: $result.=&geogebra_default_parameters($internalid); 1784: # close the <applet>-tag 1785: $result.=&geogebra_endcode(); 1786: } 1787: return $result; 1788: } 1789: 1790: sub boundaries { 1791: my ($parstack,$safeeval,$level)=@_; 1792: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level); 1793: $xmin=(defined($xmin)?$xmin:-10); 1794: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level); 1795: $xmax=(defined($xmax)?$xmax:10); 1796: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level); 1797: $ymin=(defined($ymin)?$ymin:-10); 1798: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level); 1799: $ymax=(defined($ymax)?$ymax:10); 1800: if ($xmax<=$xmin) { 1801: $xmax=$xmin+20; 1802: } 1803: if ($ymax<=$ymin) { 1804: $ymax=$ymin+20; 1805: } 1806: return ($xmin,$xmax,$ymin,$ymax); 1807: } 1808: 1809: sub start_functionplotelements { 1810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1811: my $result=''; 1812: my $id=$Apache::inputtags::response[-1]; 1813: my $partid=$Apache::inputtags::part; 1814: my $internalid = $partid.'_'.$id; 1815: 1816: if ($target eq 'edit') { 1817: return &Apache::edit::start_table($token). 1818: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 1819: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1820: .&Apache::edit::deletelist($target,$token).'   '. 1821: &Apache::edit::insertlist($target,$token).'   ' 1822: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements') 1823: .'</span></td>' 1824: ."<td> " 1825: .&Apache::edit::end_row() 1826: .&Apache::edit::start_spanning_row() 1827: ."\n"; 1828: } elsif ($target eq 'web') { 1829: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1830: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1831: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1832: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1833: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 1834: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 1835: 1836: 1837: # paste in the update routine to receive stuff back from the applet 1838: $result.=&update_script($internalid); 1839: # start the initscript for this applet 1840: $result.=&start_init_script($internalid); 1841: # put the axis commands inside 1842: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 1843: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel); 1844: # init script is left open 1845: } 1846: return $result; 1847: } 1848: 1849: 1; 1850: 1851: __END__ 1852: 1853: =head1 NAME 1854: 1855: Apache::functionplotresponse.pm; 1856: 1857: =head1 SYNOPSIS 1858: 1859: Handles tags associated with accepting function plots. 1860: 1861: This is part of the LearningOnline Network with CAPA project 1862: described at http://www.lon-capa.org. 1863: 1864: =head1 HANDLER SUBROUTINE 1865: 1866: start_functionplotresponse() 1867: 1868: =head1 OTHER SUBROUTINES 1869: 1870: =over 1871: 1872: =item end_functionplotresponse() 1873: 1874: =back 1875: 1876: =cut