plsurf3d
( | x , |
| y , | |
| z , | |
| nx , | |
| ny , | |
| opt , | |
| clevel , | |
nlevel
); |
Plots a three-dimensional shaded surface plot within the environment set up
by plw3d. The surface is defined by the two-dimensional matrix
,
the point z[nx][ny] being the
value of the function at
z[i][j](.
Note that the points in vectors x[i],y[j]) and
x do not need to be equally
spaced, but must be stored in ascending order.
For further details see the section called “Three-dimensional Plots”.
y
x
(PLFLT_VECTOR, input)
A vector containing the x coordinates at which the function is evaluated.
y
(PLFLT_VECTOR, input)
A vector containing the y coordinates at which the function is evaluated.
z
(PLFLT_MATRIX, input)
A matrix containing function values to plot. Should have
dimensions of nx by ny.
nx
(PLINT, input)
Number of values at
which function is evaluated.
x
ny
(PLINT, input)
Number of values at
which function is evaluated.
y
opt
(PLINT, input)
Determines the way in which the surface is represented. To specify more than one option just add the options, e.g. FACETED + SURF_CONT
: Network
of lines is drawn connecting points at which function is
defined.
opt=FACETED
: A contour
plot is drawn at the base XY plane using parameters
opt=BASE_CONT
nlevel and clevel.
: A contour
plot is drawn at the surface plane using parameters
opt=SURF_CONT
nlevel and clevel.
: draws a curtain
between the base XY plane and the borders of the plotted function.
opt=DRAW_SIDES
:
the surface is colored according to the value of Z; if
opt=MAG_COLOR
MAG_COLOR is not used, then
the surface is colored according to the intensity of the
reflected light in the surface from a light source whose
position is set using pllightsource.
clevel
(PLFLT_VECTOR, input)
A vector containing the contour levels.
nlevel
(PLINT, input)
Number of elements in the clevel vector.
Redacted form: plsurf3d(x, y, z, opt, clevel)
This function is not used in any examples.