version 1.18, 2010/10/30 02:31:27
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version 1.23, 2010/11/06 14:37:24
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Line 363 sub end_splinerule {
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Line 363 sub end_splinerule {
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# |
# |
# <spline label="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> |
# <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 |
# Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them |
# |
# |
Line 371 sub start_spline {
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Line 371 sub start_spline {
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
my $result=''; |
my $result=''; |
if ($target eq 'web') { |
if ($target eq 'web') { |
my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); |
my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); |
$Apache::functionplotresponse::counter++; |
$Apache::functionplotresponse::counter++; |
if ($label=~/\W/) { |
if ($label=~/\W/) { |
&Apache::lonxml::warning(&mt('Spline labels should only contain alphanumeric characters.')); |
&Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); |
} |
} |
$label=~s/\W//gs; |
$label=~s/\W//gs; |
unless ($label) { $label='S'.$Apache::functionplotresponse::counter; } |
unless ($label) { |
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$label='S'.$Apache::functionplotresponse::counter; |
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} else { |
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$label='S'.$label; |
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} |
if ($Apache::functionplotresponse::splineorder{$label}) { |
if ($Apache::functionplotresponse::splineorder{$label}) { |
&Apache::lonxml::error(&mt('Spline labels must be unique.')); |
&Apache::lonxml::error(&mt('Spline indices must be unique.')); |
} |
} |
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my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); |
my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); |
Line 404 sub start_spline {
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Line 408 sub start_spline {
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$Apache::functionplotresponse::splinescaley{$label}=$sy; |
$Apache::functionplotresponse::splinescaley{$label}=$sy; |
} elsif ($target eq 'edit') { |
} elsif ($target eq 'edit') { |
$result=&Apache::edit::tag_start($target,$token,'Spline'). |
$result=&Apache::edit::tag_start($target,$token,'Spline'). |
&Apache::edit::text_arg('Label:','label', |
&Apache::edit::text_arg('Index:','index', |
$token,'4').' '. |
$token,'4').' '. |
&Apache::edit::select_arg('Order:','order', |
&Apache::edit::select_arg('Order:','order', |
['2','3','4','5','6','7','8','9'],$token).' '. |
['2','3','4','5','6','7','8','9'],$token).' '. |
Line 419 sub start_spline {
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Line 423 sub start_spline {
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&Apache::edit::end_row(); |
&Apache::edit::end_row(); |
} elsif ($target eq 'modified') { |
} elsif ($target eq 'modified') { |
my $constructtag=&Apache::edit::get_new_args($token,$parstack, |
my $constructtag=&Apache::edit::get_new_args($token,$parstack, |
$safeeval,'label','order','initx','inity', |
$safeeval,'index','order','initx','inity', |
'scalex','scaley'); |
'scalex','scaley'); |
if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } |
if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } |
} |
} |
Line 503 sub d2dt2_cubic_hermite {
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Line 507 sub d2dt2_cubic_hermite {
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# |
# |
sub array_index { |
sub array_index { |
my ($xmin,$xmax,$x)=@_; |
my ($xmin,$xmax,$x)=@_; |
my $index=int(($x-$xmin)/($xmax-$xmin)*200.+0.5); |
return int(($x-$xmin)/($xmax-$xmin)*200.+0.5); |
return $index; |
} |
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# |
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# Actual x-value of array index |
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# |
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sub index_x { |
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my ($xmin,$xmax,$i)=@_; |
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return $i*($xmax-$xmin)/200.+$xmin; |
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} |
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# |
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# Assume function to be linear between array points |
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# Return the two indices and the scale factor |
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# |
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sub indices_scale { |
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my ($xmin,$xmax,$x)=@_; |
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my $i=&array_index($xmin,$xmax,$x); |
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my $xr=&index_x($xmin,$xmax,$i); |
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if ($xr<$x) { |
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# Desired x is right of array index |
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if ($i>=200) { return (200,200,0); } |
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return($i,$i+1,200.*($x-$xr)/($xmax-$xmin)); |
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} elsif ($xr>$x) { |
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# Desired x is left of array index |
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if ($i<=0) { return (0,0,0); } |
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return($i-1,$i,1.-200.*($xr-$x)/($xmax-$xmin)); |
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} else { |
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# Desired x is at array index (unlikely, but ...) |
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if ($i>=200) { return (200,200,0); } |
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if ($i<=0) { return (0,0,0); } |
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return ($i,$i,0); |
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} |
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} |
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# |
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# Function value |
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# |
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sub func_val { |
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my ($xmin,$xmax,$x)=@_; |
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my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
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my $fl=$Apache::functionplotresponse::func[$il]; |
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my $fh=$Apache::functionplotresponse::func[$ih]; |
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unless (defined($fl) || defined($fh)) { return undef; } |
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unless (defined($fl)) { return $fh; } |
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unless (defined($fh)) { return $fl; } |
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return $fl+$factor*($fh-$fl); |
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} |
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# |
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# First derivative |
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# |
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sub dfuncdx_val { |
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my ($xmin,$xmax,$x)=@_; |
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my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
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my $fl=$Apache::functionplotresponse::dfuncdx[$il]; |
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my $fh=$Apache::functionplotresponse::dfuncdx[$ih]; |
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unless (defined($fl) || defined($fh)) { return undef; } |
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unless (defined($fl)) { return $fh; } |
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unless (defined($fh)) { return $fl; } |
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return $fl+$factor*($fh-$fl); |
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} |
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# |
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# Second derivative |
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# |
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sub d2funcdx2_val { |
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my ($xmin,$xmax,$x)=@_; |
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my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
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my $fl=$Apache::functionplotresponse::d2funcdx2[$il]; |
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my $fh=$Apache::functionplotresponse::d2funcdx2[$ih]; |
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unless (defined($fl) || defined($fh)) { return undef; } |
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unless (defined($fl)) { return $fh; } |
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unless (defined($fh)) { return $fl; } |
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return $fl+$factor*($fh-$fl); |
} |
} |
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# |
# |
Line 514 sub array_index {
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Line 596 sub array_index {
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sub populate_arrays { |
sub populate_arrays { |
my ($id,$xmin,$xmax)=@_; |
my ($id,$xmin,$xmax)=@_; |
for (my $i=0; $i<=200; $i++) { |
for (my $i=0; $i<=200; $i++) { |
undef $Apache::functionplotresponse::func[$i]; |
$Apache::functionplotresponse::func[$i]=undef; |
undef $Apache::functionplotresponse::dfunddx[$i]; |
$Apache::functionplotresponse::dfuncdx[$i]=undef; |
undef $Apache::functionplotresponse::d2funcd2x[$i]; |
$Apache::functionplotresponse::d2funcd2x[$i]=undef; |
} |
} |
unless ($xmax>$xmin) { return; } |
unless ($xmax>$xmin) { return 'no_func'; } |
# Run over all splines in response |
# Run over all splines in response |
foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { |
foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { |
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my $xiold=-1; |
# Run over all points in spline |
# Run over all points in spline |
for (my $i=0; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { |
for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { |
my $xiold=-1; |
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my $ni=$i+1; |
my $ni=$i+1; |
my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, |
my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, |
Line 533 sub populate_arrays {
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Line 615 sub populate_arrays {
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$env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); |
$env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); |
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# Run in small steps over spline parameter |
# Run in small steps over spline parameter |
for (my $t=0; $t<=1; $t+=0.00025) { |
for (my $t=0; $t<=1; $t+=0.00025) { |
my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); |
my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); |
if ($xi<$xiold-5) { return 'no_func'; } |
if ($xi<$xiold) { return 'no_func'; } |
if ($xi>$xiold) { |
if (($xi>$xiold) && ($xi>=0) && ($xi<=200)) { |
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if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } |
$xiold=$xi; |
$xiold=$xi; |
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# Function value |
$Apache::functionplotresponse::func[$xi]=&cubic_hermite($t,@yparms); |
$Apache::functionplotresponse::func[$xi]=&cubic_hermite($t,@yparms); |
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# dy/dx=dy/dt/(dx/dt) |
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my $dxdt=&ddt_cubic_hermite($t,@xparms); |
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if ($dxdt) { |
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$Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; |
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} |
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# d^2y/dx^2 |
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my $d2xdt2=&d2dt2_cubic_hermite($t,@xparms); |
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if ($d2xdt2) { |
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$Apache::functionplotresponse::d2funcd2x[$xi]=&d2dt2_cubic_hermite($t,@yparms)/$d2xdt2; |
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} |
} |
} |
} |
} |
} |
} |
Line 667 sub end_functionplotresponse {
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Line 760 sub end_functionplotresponse {
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$xmax=(defined($xmax)?$xmax:10); |
$xmax=(defined($xmax)?$xmax:10); |
my $ad; |
my $ad; |
if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') { |
if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') { |
$ad='BAD_FORMULA'; |
$ad='NOT_FUNCTION'; |
} else { |
} else { |
$ad='INCORRECT'; |
$ad='INCORRECT'; |
} |
} |
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# |
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# Store grading info |
# Store grading info |
# |
# |