/usr/share/doc/libplplot12/examples/tcl/x11.tcl is in plplot-tcl-dev 5.10.0+dfsg2-0.1ubuntu2.
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# $Id: x11.tcl 11572 2011-02-21 07:39:43Z arjenmarkus $
#----------------------------------------------------------------------------
# Does a series of mesh plots for a given data set, with different
# viewing options in each plot.
# Routine for restoring colour map1 to default.
# See static void plcmap1_def(void) in plctrl.c for reference.
proc restore_cmap1_11 {w} {
# For center control points, pick black or white, whichever is closer to bg
# Be careful to pick just short of top or bottom else hue info is lost
$w cmd plgcolbg rbg gbg bbg
set vertex [expr {($rbg + $gbg + $bbg)/(3.*255.)}]
if {$vertex < 0.5} {
set vertex 0.01
set midpt 0.10
} else {
set vertex 0.99
set midpt 0.90
}
# Independent variable of control points.
matrix i f 6 = {0., 0.44, 0.50, 0.50, 0.56, 1.}
# Hue for control points. Blue-violet to red
matrix h f 6 = {260., 260., 260., 0., 0., 0.}
# Lightness ranging from medium to vertex to medium
# double quotes required rather than braces so that variables
# get evaluated for initialization.
matrix l f 6 = "0.5, $midpt, $vertex, $vertex, $midpt, 0.5"
# Saturation is complete for default
matrix s f 6 = {1., 1., 1., 1., 1., 1.}
# Integer flag array is zero (no interpolation along far-side of colour
# figure
matrix rev i 6 = {0, 0, 0, 0, 0, 0}
# Default number of cmap1 colours
$w cmd plscmap1n 128
# Interpolate between control points to set up default cmap1.
$w cmd plscmap1l 0 6 i h l s rev
}
# Routine for initializing color map 1 in HLS space.
# Basic grayscale variation from half-dark (which makes more interesting
# looking plot compared to dark) to light.
proc cmap1_init_11 {w gray} {
# Independent variable of control points.
matrix i f 2 = {0., 1.}
if {$gray == 1} {
# Hue for control points. Doesn't matter since saturation is zero.
matrix h f 2 = {0., 0.}
# Lightness ranging from half-dark (for interest) to light.
matrix l f 2 = {0.5, 1.}
# Gray scale has zero saturation.
matrix s f 2 = {0., 0.}
} else {
# Hue ranges from blue (240 deg) to red (0 or 360 deg)
matrix h f 2 = {240., 0.}
# Lightness and saturation are constant (values taken from C example).
matrix l f 2 = {0.6, 0.6}
matrix s f 2 = {0.8, 0.8}
}
# Integer flag array is zero (no interpolation along far-side of colour
# figure
matrix rev i 2 = {0, 0}
# Number of cmap1 colours is 256 in this case.
$w cmd plscmap1n 256
# Interpolate between control points to set up default cmap1.
$w cmd plscmap1l 0 2 i h l s rev
}
proc x11 {{w loopback}} {
# these should be defined elsewhere.
# Must use numerical rather than hex value for this one since used
# inside an array
matrix opt i 2 = "[expr {$::PLPLOT::DRAW_LINEXY}], [expr {$::PLPLOT::DRAW_LINEXY}]"
matrix alt f 2 = {33.0, 17.0}
matrix az f 2 = {24.0, 115.0}
set xpts 35
set ypts 46
matrix x f $xpts
matrix y f $ypts
matrix z f $xpts $ypts
for {set i 0} {$i < $xpts} {incr i} {
x $i = [expr {3.* ($i - ($xpts/2)) / double($xpts/2)} ]
}
for {set i 0} {$i < $ypts} {incr i} {
y $i = [expr {3.* ($i - ($ypts/2)) / double($ypts/2)} ]
}
for {set i 0} {$i < $xpts} {incr i} {
set xx [x $i]
for {set j 0} {$j < $ypts} {incr j} {
set yy [y $j]
z $i $j = [expr {3. * (1.-$xx)*(1.-$xx) * exp(-($xx*$xx) - \
($yy+1.)*($yy+1.)) - 10. * ($xx/5. - pow($xx,3.) - \
pow($yy,5.)) * exp(-$xx*$xx-$yy*$yy) - \
1./3. * exp(-($xx+1)*($xx+1) - ($yy*$yy))}]
# Jungfraujoch/Interlaken
if {1==2} {
set zz [z $i $j]
if {$zz <= -1.} {
z $i $j = -1.0
}
}
}
}
set zmin [z min [ expr {$xpts * $ypts}]]
set zmax [z max [ expr {$xpts * $ypts}]]
set nlev 10
matrix clev f $nlev
set step [expr {($zmax-$zmin)/($nlev+1)}]
for {set i 0} {$i < $nlev} {incr i} {
clev $i = [expr {$zmin + ($i+1) * $step}]
}
cmap1_init_11 $w 0
for {set k 0} {$k < 2} {incr k} {
for {set i 0} {$i < 4} {incr i} {
$w cmd pladv 0
$w cmd plcol0 1
$w cmd plvpor 0.0 1.0 0.0 0.9
$w cmd plwind -1.0 1.0 -1.0 1.5
$w cmd plw3d 1.0 1.0 1.2 -3.0 3.0 -3.0 3.0 $zmin $zmax [alt $k] [az $k]
$w cmd plbox3 "bnstu" "x axis" 0.0 0 \
"bnstu" "y axis" 0.0 0 \
"bcdmnstuv" "z axis" 0.0 4
$w cmd plcol0 2
# wireframe plot
if {$i == 0} {
$w cmd plmesh x y z [expr {[opt $k]}]
# magnitude colored wireframe plot
} elseif {$i == 1} {
$w cmd plmesh x y z [expr {[opt $k] | $::PLPLOT::MAG_COLOR}]
# magnitude colored wireframe plot with sides
} elseif {$i == 2} {
$w cmd plot3d x y z [expr {[opt $k] | $::PLPLOT::MAG_COLOR}] 1
# magnitude colored wireframe plot with base contour
} elseif {$i == 3} {
$w cmd plmeshc x y z $xpts $ypts \
[expr {[opt $k] | $::PLPLOT::MAG_COLOR | $::PLPLOT::BASE_CONT}] clev $nlev
}
$w cmd plcol0 3
set title [format "#frPLplot Example 11 - Alt=%.0f, Az=%.0f, Opt=%d" \
[alt $k] [az $k] [opt $k] ]
$w cmd plmtex "t" 1.0 0.5 0.5 $title
}
}
# Restore defaults
# $w cmd plcol0 1
restore_cmap1_11 $w
}
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