version 1.25, 2010/11/07 01:57:50
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version 1.26, 2010/11/07 11:15:37
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Line 553 sub d2dt2_cubic_hermite {
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Line 553 sub d2dt2_cubic_hermite {
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# |
# |
sub array_index { |
sub array_index { |
my ($xmin,$xmax,$x)=@_; |
my ($xmin,$xmax,$x)=@_; |
return int(($x-$xmin)/($xmax-$xmin)*200.+0.5); |
return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); |
} |
} |
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# |
# |
Line 562 sub array_index {
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Line 562 sub array_index {
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sub index_x { |
sub index_x { |
my ($xmin,$xmax,$i)=@_; |
my ($xmin,$xmax,$i)=@_; |
return $i*($xmax-$xmin)/200.+$xmin; |
return $i*($xmax-$xmin)/400.+$xmin; |
} |
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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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# |
# |
Line 596 sub indices_scale {
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Line 571 sub indices_scale {
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sub func_val { |
sub func_val { |
my ($xmin,$xmax,$x)=@_; |
my ($xmin,$xmax,$x)=@_; |
my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
return $Apache::functionplotresponse::func[&array_index($xmin,$xmax,$x)]; |
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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# |
# |
Line 611 sub func_val {
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Line 580 sub func_val {
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sub dfuncdx_val { |
sub dfuncdx_val { |
my ($xmin,$xmax,$x)=@_; |
my ($xmin,$xmax,$x)=@_; |
my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
return $Apache::functionplotresponse::dfuncdx[&array_index($xmin,$xmax,$x)]; |
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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# |
# |
Line 626 sub dfuncdx_val {
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Line 589 sub dfuncdx_val {
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sub d2funcdx2_val { |
sub d2funcdx2_val { |
my ($xmin,$xmax,$x)=@_; |
my ($xmin,$xmax,$x)=@_; |
my ($il,$ih,$factor)=&indices_scale($xmin,$xmax,$x); |
return $Apache::functionplotresponse::d2funcdx2[&array_index($xmin,$xmax,$x)]; |
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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} |
} |
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# |
# |
Line 641 sub d2funcdx2_val {
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Line 598 sub d2funcdx2_val {
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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<=400; $i++) { |
$Apache::functionplotresponse::func[$i]=undef; |
$Apache::functionplotresponse::func[$i]=undef; |
$Apache::functionplotresponse::dfuncdx[$i]=undef; |
$Apache::functionplotresponse::dfuncdx[$i]=undef; |
$Apache::functionplotresponse::d2funcd2x[$i]=undef; |
$Apache::functionplotresponse::d2funcd2x[$i]=undef; |
Line 662 sub populate_arrays {
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Line 619 sub populate_arrays {
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$env{'form.HWVAL_'.$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'}); |
# 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+=0.0001) { |
my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); |
my $xi=&array_index($xmin,$xmax,&cubic_hermite($t,@xparms)); |
if ($xi<$xiold) { return 'no_func'; } |
if ($xi<$xiold) { return 'no_func'; } |
if (($xi>$xiold) && ($xi>=0) && ($xi<=200)) { |
if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { |
if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } |
if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } |
$xiold=$xi; |
$xiold=$xi; |
# Function value |
# Function value |
Line 786 sub start_functionplotresponse {
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Line 743 sub start_functionplotresponse {
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} |
} |
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sub compare_rel { |
sub compare_rel { |
my ($relationship,$value,$val,$tol)=@_; |
my ($relationship,$value,$realval,$tol)=@_; |
if (abs($value-$val)<$tol) { return 1; } |
# is the real value defined? |
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unless (defined($realval)) { |
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if ($relationship eq 'eq') { |
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if ($value eq 'undef') { |
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return 1; |
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} else { |
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return 0; |
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} |
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} elsif ($relationship eq 'ne') { |
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if ($value eq 'undef') { |
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return 0; |
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} else { |
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return 1; |
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} |
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} else { |
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return 0; |
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} |
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} |
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# it is defined. |
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if ($relationship eq 'gt') { |
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return ($realval>$value); |
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} elsif ($relationship eq 'ge') { |
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return ($realval>$value-$tol); |
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} elsif ($relationship eq 'lt') { |
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return ($realval<$value); |
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} elsif ($relationship eq 'le') { |
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return ($realval<$value+$tol); |
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} elsif ($relationship eq 'ne') { |
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return (abs($value-$realval)>$tol); |
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} else { |
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return (abs($value-$realval)<$tol); |
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} |
return 0; |
return 0; |
} |
} |
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Line 876 sub end_functionplotresponse {
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Line 865 sub end_functionplotresponse {
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$ymin=(defined($ymin)?$ymin:-10); |
$ymin=(defined($ymin)?$ymin:-10); |
my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); |
my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); |
$ymax=(defined($ymax)?$ymax:10); |
$ymax=(defined($ymax)?$ymax:10); |
my $tolfunc=($ymax-$ymin)/100.; |
my $tolfunc=5.*($ymax-$ymin)/100.; |
my $toldfdx=1; |
my $toldfdx=1; |
my $told2fdx2=1; |
my $told2fdx2=1; |
if ($xmax>$xmin) { |
if ($xmax>$xmin) { |