NAME¶
plfsurf3d - Plot shaded 3-d surface plot
SYNOPSIS¶
plfsurf3d(
x,
y,
zops,
zp,
nx,
ny,
opt,
clevel,
nlevel)
DESCRIPTION¶
Plots a three dimensional shaded surface plot within the environment set up by
plw3d(3plplot). The surface is defined by the data contained in the 2D
const PLFLT * const * matrix or the PLfGrid2 structure
zp. How the data
in
zp is rendered is determined by the
zops parameter.
zops is a pointer to a function that reads the data out of the grid
structure. The following functions in PLplot core will return an appropriate
function pointer: plf2ops_c() (use when
zp is of type const PLFLT *
const *), plf2ops_grid_c() (use when
zp is a pointer to a row-major
PLfGrid2 structure), plf2ops_grid_row_major() (same as plf2ops_grid_c()?) and
plf2ops_grid_col_major() (use when
zp is a pointer to a column-major
PLfGrid2 structure).
nx,
nyoptclevel and
nlevel are the same as in for example
plsurf3d(3plplot).
Redacted form?
plfsurf3d(x, y, zops, zp, opt, clevel)
This function is used in example 8.
ARGUMENTS¶
- x (const PLFLT *, input)
- Pointer to set of x coordinate values at which the function is
evaluated.
- y (const PLFLT *, input)
- Pointer to set of y coordinate values at which the function is
evaluated.
- zops (PLF2OPS, input)
- Pointer to a function for processing the data contained in zp.
- zp (PLPointer, input)
- Pointer to the data to be plotted, either as a vectored two-dimensional
array with set of function values or as a PLfGrid2 structure.
- nx (PLINT, input)
- Number of x values at which function is evaluated.
- ny (PLINT, input)
- Number of y values at which function is evaluated.
- 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
opt=FACETED: Network of lines is drawn connecting points at which
function is defined. opt=BASE_CONT: A contour plot is drawn at the
base XY plane using parameters nlevel and clevel.
opt=SURF_CONT: A contour plot is drawn at the surface plane using
parameters nlevel and clevel. opt=DRAW_SIDES: draws a
curtain between the base XY plane and the borders of the plotted function.
opt=MAG_COLOR: the surface is colored according to the value of Z;
if MAG_COLOR is not used, then the default 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(3plplot).
- clevel (const PLFLT *, input)
- Pointer to the array that defines the contour level spacing.
- nlevel (PLINT, input)
- Number of elements in the clevel array.
AUTHORS¶
Many developers (who are credited at
http://plplot.sourceforge.net/credits.php)
have contributed to PLplot over its long history.
SEE ALSO¶
PLplot documentation at
http://plplot.sourceforge.net/documentation.php.