#------------------------------------------------------------------------------
# This Programme is written for contouring the given data about the
# SNT 250-600 pump blade from the pre-design model output.
# Hamdi Nadir Tural
# 702061013
# ITU Informatics Institute
# Computational Science&Engineering
#
#------------------------------------------------------------------------------
# 1. Iso-Power Contour Plots with Default Color Map
#------------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "1.png"
set contour
set cntrparam cubicspline
set cntrparam levels discrete 8,15,30,55,80,110,150,203,257,321,390,470,550,630
unset surface
set view 0,0,1
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Power Contours on Blade Meridional Section'
set xrange [-10:140]
set yrange [0:220]
set key left
splot 'gnugrid2.txt' with lines
pause -1
#-----------------------------------------------------------------------------
# 2. Iso-Power Filled Contour Plots with Default Color Map
#-----------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "2.png"
unset hidden3d
unset surf
set size 1.0,1.0
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Power Contours on Blade Meridional Section'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set palette rgbformulae  33,13,10
set colorbox user origin 0.1,0.22 size .04,.55
set cntrparam levels incremental 15,1,27
set palette maxcolors 28
splot 'gnugrid2.txt' with pm3d
pause -1
reset
#----------------------------------------------------------------------------
# 3. Iso-Power Filled Contour Plots with Gray Color Map
#----------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "3.png"
unset hidden3d
unset surf
set size 1.0,1.0
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Power Contours on Blade Meridional Section'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set palette gray
set colorbox user origin 0.1,0.22 size .04,.55
set cntrparam levels incremental 15,1,27
set palette maxcolors 28
splot 'gnugrid2.txt' with pm3d
pause -1
reset
#--------------------------------------------------------------------------
# 4. Iso-Velocity Filled Contour Plots with Default Color Map
#--------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "4.png"
unset hidden3d
unset surf
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Velocity Contours on Blade Meridional Section'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set palette rgbformulae  33,13,10
set colorbox user origin 0.1,0.22 size .04,.55
set palette maxcolors 28
splot 'gnugrid.txt' with pm3d
#set palette gray gamma 0.5 #Gamma is ignored for color mappings 
pause -1
reset
#------------------------------------------------------------------------
# 5. Iso-Velocity Filled Contour Plots with Gray Color Map
#------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "5.png"
unset hidden3d
unset surf
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Velocity Contours on Blade Meridional Section'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set palette rgbformulae  33,13,10
set palette maxcolors 28
set palette gray
set colorbox user origin 0.1,0.22 size .04,.55
splot 'gnugrid.txt' with pm3d
pause -1
reset
#----------------------------------------------------------------------
# 6. Iso-Velocity Filled Contour Plots with Gray Map (Gamma Correction)
#----------------------------------------------------------------------
reset
set terminal png size 640,480
set output "6.png"
unset hidden3d
unset surf
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Velocity Contours on Blade Meridional Section with Gamma=0.7'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set palette rgbformulae  33,13,10
set palette maxcolors 28
set palette gray
set colorbox user origin 0.1,0.22 size .04,.55
set palette gray gamma 0.7 #Gamma is ignored for color mappings
splot 'gnugrid.txt' with pm3d
reset
#----------------------------------------------------------------------------
# 7. Iso-Power Filled Contour Plots with Gray Color Map (Gamma Correction)
#----------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "7.png"
unset hidden3d
unset surf
set size 1.0,1.0
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Power Contours on Blade Meridional Section with Gamma=0.7'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set colorbox user origin 0.1,0.22 size .04,.55
set palette gray gamma 0.7
set palette maxcolors 28
splot 'gnugrid2.txt' with pm3d
pause -1
reset
#----------------------------------------------------------------------------
# 8. Iso-Power Filled Contour Plots with Gray Color Map
#----------------------------------------------------------------------------
reset
set terminal png size 640,480
set output "8.png"
unset hidden3d
unset surf
set size 1.0,1.0
set pm3d
set xlabel 'Z'
set ylabel 'R'
set title 'Iso-Power Contours on Blade Meridional Section'
set xrange [-10:140]
set yrange [0:220]
set view 0,0,1
set palette rgbformulae  3,6,3
set colorbox user origin 0.1,0.22 size .04,.55
splot 'gnugrid.txt' with pm3d
pause -1
reset
#----------------------------------------------------------------------------
set terminal windows
set output