--- loncom/homework/functionplotresponse.pm	2011/10/27 00:36:37	1.69
+++ loncom/homework/functionplotresponse.pm	2011/11/19 23:35:25	1.77
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
-# option list style responses
+# Functionplot responses
 #
-# $Id: functionplotresponse.pm,v 1.69 2011/10/27 00:36:37 www Exp $
+# $Id: functionplotresponse.pm,v 1.77 2011/11/19 23:35:25 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -35,6 +35,7 @@ use Apache::run;
  
 BEGIN {
   &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
+                                                            'plotobject','plotvector','functionplotvectorrule','functionplotvectorsumrule',
                                                             'functionplotrule','functionplotruleset',
                                                             'functionplotelements'));
 }
@@ -379,6 +380,54 @@ sub plot_script {
 }
 
 #
+# Subroutine to produce objects
+#
+
+sub plotobject_script {
+   my ($id,$label,$x,$y)=@_;
+   unless ($label) {
+      $Apache::functionplotresponse::counter++;
+      $label='O'.$Apache::functionplotresponse::counter;
+   }
+   &generate_input_field($id,$label,$x,$y);
+   return "document.ggbApplet_$id.evalCommand('a=1');\n".
+          "document.ggbApplet_$id.setVisible('a', false);\n".
+          "document.ggbApplet_$id.setLabelVisible('a', false);\n".
+          "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n".
+          "document.ggbApplet_$id.setVisible('$label', true);\n".
+          "document.ggbApplet_$id.setLabelVisible('$label', true);\n";
+}
+
+#
+# Subroutine to produce vectors
+#
+
+sub plotvector_script {
+   my ($id,$label,$xs,$ys,$xe,$ye,$xmin,$xmax)=@_;
+   unless ($label) {
+      $Apache::functionplotresponse::counter++;
+      $label='V'.$Apache::functionplotresponse::counter;
+   }
+   my $startlabel=$label.'Start';
+   my $endlabel=$label.'End';
+   my $pointlabel=$label.'Point';
+   my $pointx=2.*($xmax-$xmin)+$xmax;
+   my $anglelabel=$label.'Angle';
+   return 
+       &new_point_coordinate($id,$startlabel,$xs,$ys,0).
+       &new_point_coordinate($id,$endlabel,$xe,$ye,0).
+       (<<ENDVECTOR);
+document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]");
+document.ggbApplet_$id.setLabelVisible("$label",true);
+document.ggbApplet_$id.setLineThickness("$label",8);
+document.ggbApplet_$id.evalCommand("$pointlabel=($pointx,y($startlabel))");
+document.ggbApplet_$id.evalCommand("$anglelabel=Angle[$pointlabel,$startlabel,$endlabel]");
+document.ggbApplet_$id.setLabelVisible("$anglelabel",true);
+document.ggbApplet_$id.setLabelStyle("$anglelabel",VALUE=2);
+ENDVECTOR
+}
+
+#
 # Answer spline display
 # 
 # points: x,y,slope_x,slope_y
@@ -431,6 +480,109 @@ sub generate_spline {
    $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
    return $result;
 }
+
+#
+# Object
+#
+
+sub start_plotobject {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
+   my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval);
+   my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval);
+   my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
+   $label=~s/\W//gs;
+   $label=ucfirst($label);
+   unless ($label) { $label="NewObject"; }
+   if ($target eq 'web') {
+      my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
+      unless (defined($x)) { $x=$xmin; }
+      unless (defined($y)) { $y=$ymin; }
+      $result.=&plotobject_script($internalid,$label,$x,$y);
+   } elsif ($target eq 'edit') {
+        $result=&Apache::edit::tag_start($target,$token,'Plot Object').
+             &Apache::edit::text_arg('Label on Plot:','label',
+                                     $token,'16').
+             &Apache::edit::text_arg('x:','x',
+                                     $token,'8').
+             &Apache::edit::text_arg('y:','y',
+                                     $token,'8').
+             &Apache::edit::end_row();
+  } elsif ($target eq 'modified') {
+    $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','x','y');
+    if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+  }
+  return $result;
+}
+
+sub end_plotobject {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   if ($target eq 'edit') {
+       $result=&Apache::edit::end_table();
+   }
+   return $result;
+}
+
+#
+# Vector
+#
+
+sub start_plotvector {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
+   my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval);
+   my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval);
+   my $tipx=&Apache::lonxml::get_param('tipx',$parstack,$safeeval);
+   my $tipy=&Apache::lonxml::get_param('tipy',$parstack,$safeeval);
+
+   my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
+   $label=~s/\W//gs;
+   $label=ucfirst($label);
+   unless ($label) { $label="NewVector"; }
+   if ($target eq 'web') {
+      my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
+      unless (defined($tailx)) { $tailx=$xmin; }
+      unless (defined($taily)) { $taily=$ymin; }
+      unless (defined($tipx)) { $tipx=$xmin; }
+      unless (defined($tipy)) { $tipy=$ymin; }
+      $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy,$xmin,$xmax);
+   } elsif ($target eq 'edit') {
+        $result=&Apache::edit::tag_start($target,$token,'Plot Vector').
+             &Apache::edit::text_arg('Label on Plot:','label',
+                                     $token,'16').
+             &Apache::edit::text_arg('Tail x:','tailx',
+                                     $token,'8').
+             &Apache::edit::text_arg('Tail y:','taily',
+                                     $token,'8').
+             &Apache::edit::text_arg('Tip x:','tipx',
+                                     $token,'8').
+             &Apache::edit::text_arg('Tip y:','tipy',
+                                     $token,'8').
+
+             &Apache::edit::end_row();
+  } elsif ($target eq 'modified') {
+    $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')});
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','tipx','tipy');
+    if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+  }
+  return $result;
+}
+
+sub end_plotvector {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   if ($target eq 'edit') {
+       $result=&Apache::edit::end_table();
+   }
+   return $result;
+}
+
+
+
 #
 # <backgroundplot function="..." fixed="yes/no" />
 #
@@ -542,7 +694,7 @@ sub start_functionplotrule {
            &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
           )));
    } elsif ($target eq 'edit') {
-        $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
+        $result=&Apache::edit::tag_start($target,$token,'Function Plot Graph Rule').
              &Apache::edit::text_arg('Index/Name:','index',
                                      $token,'10').'&nbsp;'.
              &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
@@ -604,6 +756,206 @@ sub end_functionplotrule {
 
 
 #
+# <functionplotvectorrule ... />
+#
+sub start_functionplotvectorrule {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
+   $Apache::functionplotresponse::counter++;
+   if ($label=~/\W/) {
+      &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
+   }
+   $label=~s/\W//gs;
+   unless ($label) {
+      $label='V'.$Apache::functionplotresponse::counter;
+   } else {
+      $label='V'.$label;
+   }
+   if ($Apache::functionplotresponse::splineorder{$label}) {
+       &Apache::lonxml::error(&mt('Rule indices must be unique.'));
+   }
+
+   if ($target eq 'grade') {
+# Simply remember - in order - for later
+
+      my $id=$Apache::inputtags::response[-1];
+      my $partid=$Apache::inputtags::part;
+      my $internalid = $partid.'_'.$id;
+
+      my $vector=&Apache::lonxml::get_param('vector',$parstack,$safeeval);
+      $vector=~s/\W//gs;
+      $vector=ucfirst($vector);
+
+      my $attachpoint=&Apache::lonxml::get_param('attachpoint',$parstack,$safeeval);
+      $attachpoint=~s/\W//gs;
+      $attachpoint=ucfirst($attachpoint);
+
+      my $notattachpoint=&Apache::lonxml::get_param('notattachpoint',$parstack,$safeeval);
+      $notattachpoint=~s/\W//gs;
+      $notattachpoint=ucfirst($notattachpoint);
+
+      my $tailpoint=&Apache::lonxml::get_param('tailpoint',$parstack,$safeeval);
+      $tailpoint=~s/\W//gs;
+      $tailpoint=ucfirst($tailpoint);
+      my $tippoint=&Apache::lonxml::get_param('tippoint',$parstack,$safeeval);
+      $tippoint=~s/\W//gs;
+      $tippoint=ucfirst($tippoint);
+
+      my $nottailpoint=&Apache::lonxml::get_param('nottailpoint',$parstack,$safeeval);
+      $nottailpoint=~s/\W//gs;
+      $nottailpoint=ucfirst($nottailpoint);
+      my $nottippoint=&Apache::lonxml::get_param('nottippoint',$parstack,$safeeval);
+      $nottippoint=~s/\W//gs;
+      $nottippoint=ucfirst($nottippoint);
+
+      push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
+           $label,
+           'vector',
+           $internalid,
+           $vector,
+           $attachpoint,
+           $notattachpoint,
+           $tailpoint,
+           $tippoint,
+           $nottailpoint,
+           $nottippoint,
+           &Apache::lonxml::get_param('length',$parstack,$safeeval),
+           &Apache::lonxml::get_param('angle',$parstack,$safeeval),
+           &Apache::lonxml::get_param('lengthpercenterror',$parstack,$safeeval),
+           &Apache::lonxml::get_param('anglepercenterror',$parstack,$safeeval),
+          )));
+   } elsif ($target eq 'edit') {
+        $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Rule').
+             &Apache::edit::text_arg('Index/Name:','index',
+                                     $token,'10').'&nbsp;'.
+             &Apache::edit::text_arg('Vector:','vector',
+                                      $token,'16').'<br />'.
+             &Apache::edit::text_arg('Attached to object:','attachpoint',
+                                      $token,'16').
+             &Apache::edit::text_arg('Not attached to object:','notattachpoint',
+                                      $token,'16').'<br />'.
+             &Apache::edit::text_arg('Tail attached to object:','tailpoint',
+                                      $token,'16').
+             &Apache::edit::text_arg('Tip attached to object:','tippoint',
+                                      $token,'16').
+             &Apache::edit::text_arg('Tail not attached to object:','nottailpoint',
+                                      $token,'16').
+             &Apache::edit::text_arg('Tip not attached to object:','nottippoint',
+                                      $token,'16').'<br />'.
+             &Apache::edit::text_arg('Length:','length',
+                                     $token,'16').
+             &Apache::edit::text_arg('Angle:','angle',
+                                     $token,'16').
+             &Apache::edit::text_arg('Percent error length:','lengthpercenterror',
+                                     $token,'8').
+             &Apache::edit::text_arg('Percent error angle:','anglepercenterror',
+                                     $token,'8').
+             &Apache::edit::end_row();
+  } elsif ($target eq 'modified') {
+    $env{'form.'.&Apache::edit::html_element_name('vector')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('vector')});
+    $env{'form.'.&Apache::edit::html_element_name('attachpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('attachpoint')});
+    $env{'form.'.&Apache::edit::html_element_name('notattachpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('notattachpoint')});
+    $env{'form.'.&Apache::edit::html_element_name('tailpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('tailpoint')});
+    $env{'form.'.&Apache::edit::html_element_name('tippoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('tippoint')});
+    $env{'form.'.&Apache::edit::html_element_name('nottailpoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('nottailpoint')});
+    $env{'form.'.&Apache::edit::html_element_name('nottippoint')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('nottippoint')});
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+                                                 $safeeval,'index','vector','attachpoint','notattachpoint',
+                                                           'tailpoint','tippoint','nottailpoint','nottipoint',
+                                                           'length','angle',
+                                                           'lengthpercenterror','anglepercenterror');
+    if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+   }
+   return $result;
+}
+
+sub end_functionplotvectorrule {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   if ($target eq 'edit') {
+       $result=&Apache::edit::end_table();
+   }
+   return $result;
+}
+
+#
+# <functionplotvectorsumrule ... />
+#
+sub start_functionplotvectorsumrule {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
+   $Apache::functionplotresponse::counter++;
+   if ($label=~/\W/) {
+      &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
+   }
+   $label=~s/\W//gs;
+   unless ($label) {
+      $label='V'.$Apache::functionplotresponse::counter;
+   } else {
+      $label='V'.$label;
+   }
+   if ($Apache::functionplotresponse::splineorder{$label}) {
+       &Apache::lonxml::error(&mt('Rule indices must be unique.'));
+   }
+   if ($target eq 'grade') {
+# Simply remember - in order - for later
+      my $id=$Apache::inputtags::response[-1];
+      my $partid=$Apache::inputtags::part;
+      my $internalid = $partid.'_'.$id;
+      my $object=&Apache::lonxml::get_param('object',$parstack,$safeeval);
+      $object=~s/\W//gs;
+      $object=ucfirst($object);
+      push(@Apache::functionplotresponse::functionplotvectorrules,join(':',(
+           $label,
+           'sum',
+           $internalid,
+           $object,
+           &Apache::lonxml::get_param('length',$parstack,$safeeval),
+           &Apache::lonxml::get_param('angle',$parstack,$safeeval),
+           &Apache::lonxml::get_param('lengthpercenterror',$parstack,$safeeval),
+           &Apache::lonxml::get_param('lengthabserror',$parstack,$safeeval),
+           &Apache::lonxml::get_param('anglepercenterror',$parstack,$safeeval),
+          )));
+   } elsif ($target eq 'edit') {
+        $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Sum Rule').
+             &Apache::edit::text_arg('Index/Name:','index',
+                                     $token,'10').'&nbsp;'.
+             &Apache::edit::text_arg('Vectors attached to object:','object',
+                                      $token,'16').'<br />'.
+             &Apache::edit::text_arg('Sum vector length:','length',
+                                     $token,'16').
+             &Apache::edit::text_arg('Sum vector angle:','angle',
+                                     $token,'16').
+             &Apache::edit::text_arg('Percent error length:','lengthpercenterror',
+                                     $token,'8').
+             &Apache::edit::text_arg('Absolute error length:','lengthabserror',
+                                     $token,'8').
+             &Apache::edit::text_arg('Percent error angle:','anglepercenterror',
+                                     $token,'8').
+             &Apache::edit::end_row();
+  } elsif ($target eq 'modified') {
+    $env{'form.'.&Apache::edit::html_element_name('object')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('object')});
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+                                                 $safeeval,'index','object',
+                                                           'length','angle',
+                                                           'lengthpercenterror','lengthabserror','anglepercenterror');
+    if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+   }
+   return $result;
+}
+
+sub end_functionplotvectorsumrule {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result='';
+   if ($target eq 'edit') {
+       $result=&Apache::edit::end_table();
+   }
+   return $result;
+}
+
+#
 # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
 #
 # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
@@ -844,6 +1196,7 @@ sub start_functionplotresponse {
   $Apache::functionplotresponse::counter=0;
 # Remember rules
   undef @Apache::functionplotresponse::functionplotrules;
+  undef @Apache::functionplotresponse::functionplotvectorrules;
 # Remember failed rules
   if ($target eq 'grade') {
      undef @Apache::functionplotresponse::failedrules;
@@ -1017,6 +1370,62 @@ sub fpr_d2fdx2 {
                                                                 $Apache::functionplotresponse::fpr_xmax,
                                                                 $arg)];
 }
+
+
+sub vectorcoords {
+   my ($id,$label)=@_;
+   return ($env{'form.HWVAL_'.$id.'_'.$label.'Start_x'},
+           $env{'form.HWVAL_'.$id.'_'.$label.'End_x'},
+           $env{'form.HWVAL_'.$id.'_'.$label.'Start_y'},
+           $env{'form.HWVAL_'.$id.'_'.$label.'End_y'});
+}
+
+sub objectcoords {
+   my ($id,$label)=@_;
+   return ($env{'form.HWVAL_'.$id.'_'.$label.'_x'},
+           $env{'form.HWVAL_'.$id.'_'.$label.'_y'});
+}
+ 
+sub vectorangle {
+   my ($x,$y)=@_;
+}
+
+sub vectorlength {
+   my ($x,$y)=@_;
+   return sqrt($x*$x+$y*$y);
+}
+
+
+#
+# Evaluate a functionplotvectorrule
+#
+
+sub functionplotvectorrulecheck {
+   my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
+   my ($label,$type)=split(/\:/,$rule);
+   if ($type eq 'vector') {
+      return &vectorcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
+   } elsif ($type eq 'sum') {
+      return &sumcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval);
+   }
+}
+
+sub vectorcheck {
+   my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
+   my ($label,$type,$id,$vector,
+       $attachpoint,$notattachpoint,
+       $tailpoint,$tippoint,$nottailpoint,$nottippoint,
+       $length,$angle,$lengthpercenterror,$anglepercenterror)=split(/\:/,$rule);
+}
+
+sub sumcheck {
+   my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
+   my ($label,$type,$id,$object,$length,$angle,$lengthpercenterror,$lengthabserror,$anglepercenterror)=split(/\:/,$rule);
+}
+
+#
+# Evaluate a functionplotrule
+#
  
 sub functionplotrulecheck {
    my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_;
@@ -1241,6 +1650,13 @@ sub end_functionplotruleset {
                  $ad='INCORRECT';
                  last;
               }
+           }
+# And now go through the vector rules
+           foreach my $rule (@Apache::functionplotresponse::functionplotvectorrules) {
+              unless (&functionplotvectorrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) {
+                 $ad='INCORRECT';
+                 last;
+              }
            }
 # If it's not wrong, it's correct 
            unless ($ad) { $ad='EXACT_ANS' };