TDITRI - Add triangles defining a simple surface to the triangles
in a triangle list.
CALL TDITRI (U, NU, V, NV, W, NW, F, LF1D, LF2D, FISO, RTRI, MTRI,
NTRI, IRST)
#include <ncarg/ncargC.h>
void c_tditri(float *u, int nu, float *v, int nv, float *w, int
nw, float *f, int lf1d, int lf2d, float fiso, float *rtri, int mtri, int
*ntri, int irst)
The arguments of TDITRI are as follows:
- U
- (an input array, of type REAL, dimensioned NU) - values of an independent
variable "u". It must be the case that U(1) < U(2) < ...
U(NU-1) < U(NU).
- NU
- (an input expression of type INTEGER) - the dimension of U.
- V
- (an input array, of type REAL, dimensioned NV) - values of an independent
variable "v". It must be the case that V(1) < V(2) < ...
V(NV-1) < V(NV).
- NV
- (an input expression of type INTEGER) - the dimension of V.
- W
- (an input array, of type REAL, dimensioned NW) - values of an independent
variable "w". It must be the case that W(1) < W(2) < ...
W(NV-1) < W(NV).
- NW
- (an input expression of type INTEGER) - the dimension of W.
- F
- (an input array, of type REAL, dimensioned NU x NV x NW and having FORTRAN
first and second dimensions LF1D and LF2D, respectively) - values of a
dependent variable "f(u,v,w)". F(I,J,K) is the value of the
function "f" at the position (U(I),V(J),W(K)); the equation
"f(u,v,w)=FISO" defines a surface that one wishes to draw.
- LF1D and LF2D
- (input expressions of type INTEGER) - the FORTRAN first and second
dimensions of the array F. It must be the case that LF1D is greater than
or equal to NU and that LF2D is greater than or equal to NV.
- FISO
- (an input expression of type REAL) - the value of the function f defining
the isosurface to be drawn.
- RTRI
- (an input array, of type REAL, dimensioned 10 x MTRI) - a list of
triangles, probably created by means of calls to TDSTRI, TDITRI, and/or
TDMTRI, and sorted, probably by means of a call to TDOTRI.
- MTRI
- (an input expression of type INTEGER) - the second dimension of RTRI and
thus the maximum number of triangles the triangle list will hold.
- NTRI
- (an input/output variable of type INTEGER) - keeps track of the number of
triangles currently in the list. It is the user's responsibility to zero
this initially and its value is increased by each call to a
triangle-generating routine like TDITRI. If NTRI becomes equal to MTRI,
TDITRI does not take an error exit; instead, it just stops generating
triangles. Therefore, it's a good idea, after calling TDITRI, to check the
value of NTRI against the dimension MTRI; if they're equal, it probably
means that the triangle list filled up and that the rendered surface will
be incomplete.
- IRST
- (an input expression of type INTEGER) - specifies the index of the
rendering style to to be used for the triangles added to the triangle list
by this call.
The C-binding argument descriptions are the same as the FORTRAN
argument descriptions.
To use TDITRI or c_tditri, load the NCAR Graphics libraries ncarg,
ncarg_gks, and ncarg_c, preferably in that order.
Online: tdclrs, tdctri, tddtri, tdgeti, tdgetr, tdgrds, tdgrid,
tdgtrs, tdinit, tdlbla, tdlbls, tdline, tdlnpa, tdmtri, tdotri, tdpack,
tdpack_params, tdpara, tdplch, tdprpa, tdprpi, tdprpt, tdseti, tdsetr,
tdsort, tdstri, tdstrs
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.