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Text File | 1993-11-03 | 4.1 KB | 184 lines | [TEXT/MSWD] |
- # $Id: singulr.dem%v 3.38.2.97 1993/03/16 15:07:24 woo Exp woo $
- #
- # Demo that plots some surfaces with singularities.
- # Author: Carsten Steger
- #
- # (x,y,x^2-y^2,2xy) is the graph of w=z^2 in 4-space.
- # Therefore (x^2-y^2,2xy,x,y) is the graph of w=sqrt(z) in 4-space.
- # Coordinates 1, 2, and 3 give the real part of either function,
- # whereas coordinates 1, 2, and 4 give the imaginary part.
- # The same holds for the cube function w=z^3. The graphs are given by
- # (x,y,x^3-3xy^2,3x^2y-y^3) and (x^3-3xy^2,3x^2y-y^3,x,y).
- # And so on...
-
-
- set parametric
- set hidden3d
- set isosamples 21
- set autoscale
-
-
- set view 60,30
- set urange [-3:3]
- set vrange [-3:3]
- set title "Real part of complex square root function"
- splot u**2-v**2,2*u*v,u
- pause -1 "Hit return to continue (1)"
-
-
- set view 60,210
- set title "Real part of complex square root function (different view)"
- replot
- pause -1 "Hit return to continue (2)"
-
-
- set view 60,120
- set urange [-3:3]
- set vrange [-3:3]
- set title "Imaginary part of complex square root function"
- splot u**2-v**2,2*u*v,v
- pause -1 "Hit return to continue (3)"
-
-
- set view 60,300
- set title "Imaginary part of complex square root function (different view)"
- replot
- pause -1 "Hit return to continue (4)"
-
-
- set view 60,30
- set urange [-3:3]
- set vrange [-3:3]
- set title "Real part of complex cube root function"
- splot u**3-3*u*v**2,3*u**2*v-v**3,u
- pause -1 "Hit return to continue (5)"
-
-
- set view 60,210
- set title "Real part of complex cube root function (different view)"
- replot
- pause -1 "Hit return to continue (6)"
-
-
- set view 60,30
- set urange [-3:3]
- set vrange [-3:3]
- set title "Imaginary part of complex cube root function"
- splot u**3-3*u*v**2,3*u**2*v-v**3,v
- pause -1 "Hit return to continue (7)"
-
-
- set view 60,210
- set title "Imaginary part of complex cube root function (different view)"
- replot
- pause -1 "Hit return to continue (8)"
-
-
- set view 60,30
- set isosamples 31
- set urange [-1:1]
- set vrange [-1:1]
- set title "Real part of complex 4th root function"
- splot u**4-6*u**2*v**2+v**4,4*u**3*v-4*u*v**3,u
- pause -1 "Hit return to continue (9)"
-
-
- set view 60,210
- set title "Real part of complex 4th root function (different view)"
- replot
- pause -1 "Hit return to continue (10)"
-
-
- set view 60,120
- set urange [-1:1]
- set vrange [-1:1]
- set title "Imaginary part of complex 4th root function"
- splot u**4-6*u**2*v**2+v**4,4*u**3*v-4*u*v**3,v
- pause -1 "Hit return to continue (11)"
-
-
- set view 60,300
- set title "Imaginary part of complex 4th root function (different view)"
- replot
- pause -1 "Hit return to continue (12)"
-
-
- set isosamples 21
- set view 60,20
- set urange [-3:3]
- set vrange [-3:3]
- set title "Enneper's surface"
- splot u-u**3/3+u*v**2,v-v**3/3+v*u**2,u**2-v**2
- pause -1 "Hit return to continue (13)"
-
-
- set view 60,110
- set title "Enneper's surface (different view)"
- replot
- pause -1 "Hit return to continue (14)"
-
-
- set isosamples 31,11
- set view 60,30
- set title "Moebius strip"
- set urange [0:2*pi]
- set vrange [-0.25:0.25]
- splot (2-v*sin(u/2))*sin(u),(2-v*sin(u/2))*cos(u),v*cos(u/2)
- pause -1 "Hit return to continue (15)"
-
-
- set view 60,210
- set title "Moebius strip (view from opposite side)"
- replot
- pause -1 "Hit return to continue (16)"
-
- set nokey
- set xrange [-10:10]
- set yrange [-10:10]
- set zrange [-3:3]
- set urange [0:2*pi]
- set vrange [0:2*pi]
- set isosamples 39,60
- set view 60,120
- set title "Klein bottle"
- splot (2*sin(u)*cos(v/2)-sin(2*u)*sin(v/2)+8)*cos(v), \
- (2*sin(u)*cos(v/2)-sin(2*u)*sin(v/2)+8)*sin(v), \
- 2*sin(u)*sin(v/2)+sin(2*u)*cos(v/2)
- pause -1 "Hit return to continue (17)"
-
-
- set urange [0:2*pi]
- set vrange [0:4*pi/3]
- set isosamples 39,40
- set view 60,20
- set title "Klein bottle with look at the 'inside'"
- replot
- pause -1 "Hit return to continue (18)"
-
- set data style lines
- set xrange [-12:12]
- set yrange [-12:12]
- set zrange [-1:15]
- set nohidden3d
- set view 50,15
- set title "Klein bottle, glassblowers' version (look-through)"
- splot "klein.dat"
- pause -1 "Hit return to continue (19)"
-
-
- set hidden3d
- set view 70,305
- set title "Klein bottle, glassblowers' version (solid)"
- splot "klein.dat"
- pause -1 "Hit return to continue (20)"
-
-
- set autoscale
- set title ""
- set key
- set noparametric
- set nohidden3d
- set samples 100
- set isosamples 10
- set view 60,30
-