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 Function File: vtk_arrows3(x,y,z,nx,ny,nz,
[fmt  prop,val])
 Displayes oriented arrows at points defined by triplets (x,y,z).
Arrows are oriented along the vectors defined by triplets (nx,ny,nz)
The optional fmt takes the form of a "line specification";
e.g.
"r" would cause the arrows to be red. The optional
prop,val is a property,value pair argument.
Valid
properties are ";Color;TipLength;TipRadius;ShaftRadius;".
 Function File: vtk_axis(bool)
 Right now, this can only be used to turn the axes on and off.
Eventually this function should allow setting the scaling and limits of
the axes.
 Function File: vtk_clear
 Clears all rendered actors, title, and scalar bar. Does not clear
the axes or outline.
 Function File: vtk_close(n)
 Closes the specified vtk figure window. All structures
referencing
the figure window must be cleared from userspace in order for the
window to close.
 Function File: vtk_arrows3(x,y,z,nx,ny,nz,
[fmt  prop,val])
 Displayes oriented cones at points defined by triplets (x,y,z).
Cones are oriented along the vectors defined by triplets (nx,ny,nz)
The optional fmt takes the form of a "line specification";
e.g.
"r" would cause the arrows to be red. The optional
prop,val is a property,value pair argument.
Valid
properties are ";Color;Height;Radius;".
 Function File: vtk_contour3(x,y,z,c,[prop,val])
 Displays a contour plot defined by x,y,z
matrices,
where x and y are typically formed by meshgrid.
c is an optional matrix to give a color scale.
Optional prop,val arguments can be used
to change
properties of the plot. Currently, valid properties are
";NConts;".
 Function File: f = vtk_figure(n)
 Creates a vtk figure window and returns its information in the
octave
structure variable f. For figures that already exist, the
figure structure for the specified figure number is returned. To get
the current figure, use f = vtk_figure(0).
 Function File: [color, mt, lsty]
= vtk_get_line_spec(fmt)
 Octaviz internal function for processing format specifications.
 Function File: vtk_imshow(a)
 Displays the unscaled (0256?) data in a as an image.
a
may be NxM or NxMx3.
 Function File: vtk_line3(x, y,
z, [fmt  prop,val])

Plots 3D line segments between the specified points. The data
point
coordinates must be given as 3 equal size x, y,
and
z matrices. The optional fmt takes the form
of a "line
specification"; e.g. "r" would cause the lines to be plotted in color
red. The optional prop,val is a property,value
pair
argument. Valid properties are Color, Radius, and Opacity.
Example: Knot (torus)

nmeridian = 6; nlongitude = 11; phi = 0:pi/1000:2*pi; mu = phi * nmeridian; x = cos(mu) .* (1 + cos(nlongitude*mu/nmeridian) / 2.0); y = sin(mu) .* (1 + cos(nlongitude*mu/nmeridian) / 2.0); z = sin(nlongitude*mu/nmeridian) / 2.0; vtk_line3(x',y',z','Radius',0.05);

 Function File: vtk_mesh(x,y,z,c,[prop,val])

Displays a mesh plot defined by x,y,z
matrices,
where x and y are typically formed by meshgrid.
c is an optional matrix to give a color scale.
Optional prop,val arguments can be used to
change
properties of the plot. Currently, valid properties are
";BallRadius;LineRadius;Fancy;".
Example: Triaxial Teardrop

[u,v] = meshgrid(0.01:pi/20:pi,0:pi/20:2*pi); x = ( 1  cos(u) ) .* cos( u + 2*pi/3 ) .* cos( v + 2*pi/3 ) / 2; y = ( 1  cos(u) ) .* cos( u + 2*pi/3 ) .* cos( v  2*pi/3 ) / 2; z = cos( u  2*pi/3 ); vtk_mesh(x,y,z,'Fancy',1);

 Function File: vtk_meshc(x,y,z,c,[prop,val])

Displays both a mesh and contour plot defined by x,y,z
matrices,
where x and y are typically formed by meshgrid.
c is an optional matrix to give a color scale.
Optional prop,val arguments can be used to
change
properties of the plot. Currently, valid properties are
";BallRadius;LineRadius;Fancy;NConts;".
 Function File: vtk_plot(x, y,
[fmt  prop,val])
 Plots a typical scatter & line plot. x must be a
vector input.
y should be columns of data to plot against x.
If
y is omitted, x is plotted against its
indices.
The optional formating arguments do nothing at the moment. More
features are to be added with time.
 Function File: vtk_plot3(x, y,
z, [fmt  prop,val])
 Plots a 3D point cloud. The data point coordinates must be given
as
3 equal length x, y, and z vectors.
The optional
fmt takes the form of a "line specification"; e.g. "*r"
would cause
the points to be plotted as red spheres. The optional
prop,val is a property,value pair argument.
Valid
properties are MarkerColor, MarkerSize, and Opacity.
Example: Everybody's favorite

o = [30 62 19;8 21 10]; n = [31 21 11;18 42 14;55 46 17;56 25 13]; c = [5 49 15;30 50 16;42 42 15;43 29 13;18 28 12;32 6 8;63 36 15;59 60 20]; h = [23 5 7;32 0 16;37 5 0;73 36 16;69 60 20;54 62 28;57 66 12;6 59 16;1 44 22;0 49 6]; vtk_plot3(o(:,1),o(:,2),o(:,3),'MarkerSize', 8, 'MarkerColor', [1 0 0]); vtk_plot3(n(:,1),n(:,2),n(:,3),'MarkerSize',10, 'MarkerColor', [0 0 1]); vtk_plot3(c(:,1),c(:,2),c(:,3),'MarkerSize',10, 'MarkerColor', [0 1 0]); vtk_plot3(h(:,1),h(:,2),h(:,3),'MarkerSize', 5, 'MarkerColor', [1 1 1]);

 Function File: vtk_poly3(x, y,
z, [fmt  prop,val])
 Plots the specified points as a 3D polygon. The data point
coordinates must be given as 3 equal length x, y,
and
z vectors. The optional fmt takes the form
of a "line
specification"; e.g. "r" would result in a red polygon. The optional
prop,val is a property,value pair argument.
Valid
properties are currently ";Color;Opacity;".
 Function File: f = vtk_polycut(t,x,y,z,c,p0,n)
 This function cuts a polygon surface at a plane, leaving only the
line plot of the surface in that plane. The plane is defined by the
point p0 and the normal n.
This function is a bit rough and likely to change in the future.
 Function File: vtk_print(filename,options)
 "Prints" to a file. Default output is
postscript if not specified.
options:
ddevice
 Output device, where device is one of:
ps
eps
pdf
 Postscript or pdf type output
tiff
jpeg
png
 Image output
rib
 Renderman output
vect
 Use only vector graphic output for postscript/pdf. Default is
to
write 3D props as an image. Warning: incorrect polygon placement
and/or huge filesize is probable with this option.
tex
 Write text to a tex file and exclude text from
postscript/pdf.
nocompress
 Do not compress images in pdf and tiff output.
qualityXX
 Set jpeg quality. Default is 100.
The vtk window must be the top window on your display (i.e.
unobstructed) for most of the output devices to work properly. This
function now attempts to raise your vtk window to the top, but your
windows manager may intercept that call (e.g. KDE). To prevent
this, you should turn off socalled "Focus stealing prevention"
options in your windows manager.
 Function File: f = vtk_quiver3(z,u,v,w)
 Plots the surface defined by z and line segments
(~arrows) from
the surface as defined by (u,v,w).
This function is a bit rough and likely to change in the future.
 Function File: vtk_scalarbar(string)
 Adds a color scalar bar to the side of a vtk figure. The input
string will be the title of the scalar bar. This is a
work
in progress. It doesn't update automatically (although it can be
called again), and only works on the last actor rendered.
 Function File: vtk_surf(x,y,z,c,[prop,val])
 Displays a surface plot defined by x,y,z
matrices,
where x and y are typically formed by meshgrid.
c is an optional matrix to give a color scale.
Optional prop,val arguments can be used
to change
properties of the plot. Currently, valid properties are
";Opacity;Color;".
Example: Spherical harmonics

[phi,theta] = meshgrid(0:pi/250:pi,0:pi/250:2*pi); m0 = 4; m1 = 3; m2 = 2; m3 = 3; m4 = 6; m5 = 2; m6 = 6; m7 = 4; r = sin(m0*phi).^m1 + cos(m2*phi).^m3 + sin(m4*theta).^m5 + cos(m6*theta).^m7; x = r .* sin(phi) .* cos(theta); y = r .* cos(phi); z = r .* sin(phi) .* sin(theta); vtk_surf(x,y,z);

 Function File: vtk_surfc(x,y,z,c,[prop,val])

Displays both a surface and contour plot defined by x,y,z
matrices,
where x and y are typically formed by meshgrid.
c is an optional matrix to give a color scale.
Optional prop,val arguments can be used to
change
properties of the plot. Currently, valid properties are
";Opacity;Color;NConts;".
 Function File: vtk_title(string)
 Adds a title to a vtk figure.
 Function File: f = vtk_trimesh(t,x,y,z,c,[prop,val])

Displays a meshplot defined by specified triangles.
t gives a list of vertex indexes forming the triangles.
x,y,z are vectors defining the
vertices. c is a vector
of color scalar values for the vertices and may be omitted.
The vtk_figure object is returned in f, if desired.
trimesh can be called with 2(3) or 4(5) parameters as
trimesh(t,[x1 y1 z1; ...; xn, yn, zn],(c)) or
trimesh(t,[x1; ...; xn],[y1; ...; yn], [z1; ...; zn],(c))
Optional prop,val arguments can be used to
change
properties of the plot. Currently, valid properties are
";BallRadius;LineRadius;Fancy;".
 Function File: f = vtk_trisurf(t,x,y,z,c,[prop,val])
 Displays a surface defined by specified triangles.
t gives a list of vertex indexes forming the triangles.
x,y,z are vectors defining the
vertices. c is a vector
of color scalar values for the vertices and may be omitted.
The vtk_figure object is returned in f, if desired.
trisurf can be called with 2(3) or 4(5) parameters as
trisurf(t,[x1 y1 z1; ...; xn, yn, zn],(c)) or
trisurf(t,[x1; ...; xn],[y1; ...; yn], [z1; ...; zn],(c))
Optional prop,val arguments can be used
to change
properties of the plot. Currently, valid properties are
";Opacity;Color;".
 Function File: vtk_update(f)
 Internal octaviz function for updating the specified figure.
This document was generated
by Dragan Tubic on November, 27 2004
using texi2html
