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|
/*
* contdata.c - manipulate the contour data
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "CNplot.h"
static void convert_rect_to_rect();
static void convert_rect_to_rect2();
static void convert_rect_to_tria2();
static void convert_rect_to_tria4();
static void convert_rect_to_mat();
static void create_boundary_nodes();
/*
* The contour data is originally in a 3D list of triangles
* [ T0 (npts, pt0, pt1, pt2) ... TN (npts, pt0, pt1, pt2) ]
* Go thru the contour data and rearrange it into a set of triangles
*
* This data is stored in a linked list, since there is there could be
* multiple contour data sets (e.g. 2 sets of data from 2 files)
*
* xmin, xmax, ymin, ymax, zmin, zmax - bounds
* triahead,triatail - pointers to linked list of triangles
* cstep - the contour step size
*/
CNdatasetptr
CNget_triangular_contour_data(filename, dataname,
xmin,xmax,ymin,ymax,zmin,zmax,
triahead,triatail,ID)
char *filename; /* Name of original file */
char *dataname; /* Data name */
double xmin,xmax; /* Data boundaries (x) */
double ymin,ymax; /* Data boundaries (y) */
double zmin,zmax; /* Data boundaries (z) */
CNtriaptr triahead,triatail; /* List of triangles */
int ID; /* Data ID */
{
CNdatasetptr CNmake_dataset();
CNdatasetptr dptr;
/*
* Create and initialize a data structure to hold this contour data set
* The boundary is the same as the viewport.
*/
if ((dptr = CNmake_dataset(filename,dataname,CN_CONTOUR,
xmin,xmax,ymin,ymax,zmin,zmax,
xmin,xmax,ymin,ymax,zmin,zmax,ID))==NULL)
return(dptr);
/*
* Make sure the grid field is empty
*/
dptr->grid = NULL;
/*
* put in zmin and zmax into the cmin/cmax fields
*/
dptr->data_pr.cmin = zmin;
dptr->data_pr.cmax = zmax;
/*
* Calculate the optimum stepsize (default method is CN_STEPSIZE)
*/
dptr->data_pr.cstep = CNround_to_decimal((zmax-zmin)/(double)CN_IDLSTEPS);
/*
* Link the triangles to the data-structure
*/
dptr->triahead = triahead;
dptr->triatail = triatail;
/*
* Return the pointer
*/
return(dptr);
}
/*
* The contour data is originally in a 1D array
* [ [0,0]...[i,0]...[nx,0], [0,j]...[i,j]...[nx,ny] ]
* Go thru the contour data and rearrange it into a set of rectangles/triangles
* The contour data is in a non-uniform grid
*
* This data is stored in a dataset; the original 1D array (2D grid) is
* discarded.
*/
CNdatasetptr
CNget_rectilinear_contour_data(filename, dataname,
xgrid_arr, ygrid_arr, zgrid_arr, nx, ny,
joincurve,contintrp,ID)
char *filename; /* Name of original file */
char *dataname; /* Data name */
double *xgrid_arr; /* 1D data array x[i] */
double *ygrid_arr; /* 1D data array y[j] */
double *zgrid_arr; /* 1D data array z(i,j) */
int nx, ny; /* #x and y gridpoints */
int joincurve; /* Contour interpolation */
int contintrp; /* Interpolate rectangle */
int ID; /* Data ID */
{
CNdatasetptr CNmake_dataset();
CNdatasetptr dptr;
CNgrid4Dptr grid;
double xmin, xmax, ymin, ymax, zmin, zmax;
int i;
/* Check the arrays */
if (xgrid_arr == NULL) {
(void) fprintf(stderr,"Error! NULL x-array!\n");
return(NULL);
}
if (ygrid_arr == NULL) {
(void) fprintf(stderr,"Error! NULL y-array!\n");
return(NULL);
}
if (zgrid_arr == NULL) {
(void) fprintf(stderr,"Error! NULL z-array!\n");
return(NULL);
}
/* Search for the max and min */
xmin = CN_LARGE;
xmax = -CN_LARGE;
for (i=0; i<nx; i++) {
if (xgrid_arr[i] < xmin) xmin = xgrid_arr[i];
if (xgrid_arr[i] > xmax) xmax = xgrid_arr[i];
}
ymin = CN_LARGE;
ymax = -CN_LARGE;
for (i=0; i<ny; i++) {
if (ygrid_arr[i] < ymin) ymin = ygrid_arr[i];
if (ygrid_arr[i] > ymax) ymax = ygrid_arr[i];
}
zmin = CN_LARGE;
zmax = -CN_LARGE;
for (i=0; i<nx*ny; i++) {
if (zgrid_arr[i] < zmin) zmin = zgrid_arr[i];
if (zgrid_arr[i] > zmax) zmax = zgrid_arr[i];
}
/*
* Create and initialize a data structure to hold this contour dataset.
* The boundary is the same as the viewport.
*/
if ((dptr = CNmake_dataset(filename,dataname,CN_CONTOUR,
xmin,xmax,ymin,ymax,zmin,zmax,
xmin,xmax,ymin,ymax,zmin,zmax,ID))==NULL)
return(dptr);
/*
* Create a grid structure
*/
grid = CNmake_grid4D(0);
if (grid == NULL) {
/* Free the dataset */
/* Free the char strings */
CNdestroy_string(dptr->filename);
CNdestroy_string(dptr->label);
/* Delete the view */
CNdelete_view(dptr->view_pr);
/* Now delete dptr */
free ((char*)dptr);
return(NULL);
} else {
/* Fill in the grid */
dptr->grid = grid;
grid->xarray = xgrid_arr;
grid->yarray = ygrid_arr;
grid->zarray = zgrid_arr;
grid->nx = nx;
grid->ny = ny;
grid->nz = nx*ny;
grid->xmin = xmin;
grid->xmax = xmax;
grid->ymin = ymin;
grid->ymax = ymax;
grid->zmin = zmin;
grid->zmax = zmax;
}
/*
* put in zmin and zmax into the cmin/cmax fields
*/
dptr->data_pr.cmin = zmin;
dptr->data_pr.cmax = zmax;
/*
* Calculate the optimum stepsize (default method is CN_STEPSIZE)
*/
dptr->data_pr.cstep = CNround_to_decimal((zmax-zmin)/(double)CN_IDLSTEPS);
/*
* convert the rectangular arrays into a linked list of triangles/rects
*/
CNpartition_rectilinear_data(
&(dptr->pointhead), &(dptr->pointtail),
&(dptr->nodehead), &(dptr->nodetail),
&(dptr->triahead), &(dptr->triatail),
&(dptr->recthead), &(dptr->recttail),
dptr->grid->xarray, dptr->grid->nx, dptr->grid->xmin, dptr->grid->xmax,
dptr->grid->yarray, dptr->grid->ny, dptr->grid->ymin, dptr->grid->ymax,
dptr->grid->zarray, dptr->grid->nz, dptr->grid->zmin, dptr->grid->zmax,
contintrp, joincurve);
/*
* Return the pointer
*/
return(dptr);
}
/*
* Change the contour interpolation style
*/
void CNreconstruct_contour_mesh(dptr)
CNdatasetptr dptr;
{
int joincurve=CN_FALSE;
/* Check for a valid dptr */
if (dptr == NULL) {
(void) fprintf(stderr, "***Error! Cannot contour NULL dataset\n");
return;
}
if (dptr->datatype != CN_CONTOUR) {
(void) fprintf(stderr,
"***Error! Cannot reinterpolate NON-CONTOUR dataset\n");
return;
}
if (dptr->grid == NULL) {
(void) fprintf(stderr, "***Error! No grid attached to dataset\n");
return;
}
/* Delete the current triangles/points */
CNdelete_rect_list (&(dptr->recthead) ,&(dptr->recttail));
CNdelete_tria_list (&(dptr->triahead) ,&(dptr->triatail));
CNdelete_node_list (&(dptr->nodehead) ,&(dptr->nodetail));
CNdelete_point_list(&(dptr->pointhead),&(dptr->pointtail));
/*
* convert the rectangular arrays into a linked list of triangles/rects
*/
CNpartition_rectilinear_data(
&(dptr->pointhead), &(dptr->pointtail),
&(dptr->nodehead), &(dptr->nodetail),
&(dptr->triahead), &(dptr->triatail),
&(dptr->recthead), &(dptr->recttail),
dptr->grid->xarray, dptr->grid->nx, dptr->grid->xmin, dptr->grid->xmax,
dptr->grid->yarray, dptr->grid->ny, dptr->grid->ymin, dptr->grid->ymax,
dptr->grid->zarray, dptr->grid->nz, dptr->grid->zmin, dptr->grid->zmax,
(int) dptr->data_pr.contintrp, joincurve);
}
/*
* Convert the arrays into points, nodes, triangles, rectangles
*/
void CNpartition_rectilinear_data(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
contintrp, joincurve)
CNpointptr *pointhead, *pointtail;
CNnodeptr *nodehead, *nodetail;
CNtriaptr *triahead, *triatail;
CNrectptr *recthead, *recttail;
double *xgrid_arr, xmin, xmax;
double *ygrid_arr, ymin, ymax;
double *zgrid_arr, zmin, zmax;
int nx, ny, nz;
int contintrp, joincurve;
{
/*
* Check the array size - if there are more than 500x500 elements
* then don't rectangularize or triangularize
*
* Given nx*ny elements, get approx nx*ny rects, nx*ny nodes, nx*ny pts
* Point size ~= 40 bytes
* Node size ~= 32 bytes
* Rect size ~= 40 bytes
* Therefore nx*ny*112 bytes = total size required
*/
if (nx*ny*(sizeof(CNpoint)+sizeof(CNnode)+sizeof(CNrect)) > 64000000) {
(void) fprintf(stdout,"Warning! Too many points in the array!\n");
(void) fprintf(stdout,"Rectangularization failed...!\n");
return;
}
/*
* convert the rectangular array into a linked list of triangles/rects
*/
if (contintrp == CN_RECT2TRIA)
/* Two triangles to a rectangle */
convert_rect_to_tria2(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve);
else if (contintrp == CN_RECT4TRIA)
/* Four triangles to a rectangle */
convert_rect_to_tria4(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve);
else if (contintrp == CN_RECTFLAT)
/* Put the nodes in flat rectangles */
convert_rect_to_rect2(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve);
else if (contintrp == CN_RECT2MAT)
/* Put the nodes in material-dependent rectangles */
convert_rect_to_mat(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve);
else
/* Put the nodes in a rectangle */
convert_rect_to_rect (pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve);
}
/*
* convert the rectangular array into a linked list of rectangles
* A rectangle contains 4 nodes.
* Each node contains 1 point.
* So the dataset contains a list of points, a list of nodes and a
* list of rectangles. In this case, there is a one-to-one mapping
* between nodes, but in the more general case, several nodes could
* map to a single point.
*/
/*ARGSUSED*/
static void convert_rect_to_rect(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve)
CNpointptr *pointhead, *pointtail;
CNnodeptr *nodehead, *nodetail;
CNtriaptr *triahead, *triatail;
CNrectptr *recthead, *recttail;
double *xgrid_arr, xmin, xmax; /* 1D data array x[i] */
double *ygrid_arr, ymin, ymax; /* 1D data array y[j] */
double *zgrid_arr, zmin, zmax; /* 1D data array z[i,j] */
int nx, ny, nz; /* #x and y gridpoints */
int joincurve; /* Boundary interpolation */
{
CNpointptr pt;
CNnodeptr *ndarr;
CNnodeptr nd, nd00, nd01, nd10, nd11;
double x, y, z, t;
int i, j, istart, iend, jstart, jend;
int ptID=0, ndID=0, rtID=0;
/*
* If the contours are to be joined at the boundary, then
* there must be a boundary layer around the contour box.
* Create a bunch of rectangles filling up this boundary layer.
*
* The array normally goes from x[1]..x[nx]
* Boundary values are x[0], x[nx+1]
*/
if (joincurve != CN_NONE) {
istart = 0;
jstart = 0;
iend = nx+2;
jend = ny+2;
} else {
istart = 1;
jstart = 1;
iend = nx+1;
jend = ny+1;
}
/* create node array */
ndarr = CNcreate_nodeptr_array(nx+2,ny+2);
/* create a list of nodes and points */
for (i=1; i<nx+1; i++)
for (j=1; j<ny+1; j++) {
x = CNget_1D_double_array_value(xgrid_arr,(i-1),nx);
y = CNget_1D_double_array_value(ygrid_arr,(j-1),ny);
z = 0.0;
t = CNget_1D_double_array_value(zgrid_arr,((i-1)+(j-1)*nx),nx*ny);
pt = CNinsert_point(pointhead,pointtail,x,y,z,ptID++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
}
/* create a list of nodes at the boundary */
if (joincurve != CN_NONE)
create_boundary_nodes(ndarr,
nodehead,nodetail,&ndID,
pointhead,pointtail,&ptID,
xmin,xmax,ymin,ymax,zmin,zmax,
xgrid_arr,ygrid_arr,nx,ny,joincurve);
/* create a list of rectangles */
for (i=istart; i<iend-1; i++)
for (j=jstart; j<jend-1; j++) {
nd00 = CNget_nodeptr_array_value(ndarr,i ,j ,nx+2,ny+2);
nd01 = CNget_nodeptr_array_value(ndarr,i ,j+1,nx+2,ny+2);
nd10 = CNget_nodeptr_array_value(ndarr,i+1,j ,nx+2,ny+2);
nd11 = CNget_nodeptr_array_value(ndarr,i+1,j+1,nx+2,ny+2);
(void) CNinsert_rect(recthead,recttail,
nd00,nd01,nd11,nd10,rtID++);
}
/* free the temp arrays */
CNfree_nodeptr_array(ndarr);
}
/*
* convert the rectangular array into a linked list of flat rectangles
* The rectangle is actually a z=constant plane surrounding the x-y point
* A rectangle contains 4 nodes - each with the same t-value.
* Each node contains 1 point.
* So the dataset contains a list of points, a list of nodes and a
* list of rectangles. In this case, there is a one-to-one mapping
* between nodes, but in the more general case, several nodes could
* map to a single point.
*/
/*ARGSUSED*/
static void convert_rect_to_rect2(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve)
CNpointptr *pointhead, *pointtail;
CNnodeptr *nodehead, *nodetail;
CNtriaptr *triahead, *triatail;
CNrectptr *recthead, *recttail;
double *xgrid_arr, xmin, xmax; /* 1D data array x[i] */
double *ygrid_arr, ymin, ymax; /* 1D data array y[j] */
double *zgrid_arr, zmin, zmax; /* 1D data array z[i,j] */
int nx, ny, nz; /* #x and y gridpoints */
int joincurve; /* Boundary interpolation */
{
CNpointptr pt;
CNpointptr *ptarr;
CNnodeptr nd00, nd01, nd10, nd11;
double xc, yc, xl, yl, x, y, z, t;
int i, j;
int ptID=0, ndID=0, rtID=0;
/*
* No boundary - joincurve is ignored
*/
/* create point array */
ptarr = CNcreate_pointptr_array(nx+1,ny+1);
/* create a list of nodes and points */
for (i=0; i<=nx; i++)
for (j=0; j<=ny; j++) {
/* Center of the rect */
if (i==nx)
xc = CNget_1D_double_array_value(xgrid_arr,i-1,nx);
else
xc = CNget_1D_double_array_value(xgrid_arr,i,nx);
if (j==ny)
yc = CNget_1D_double_array_value(ygrid_arr,j-1,ny);
else
yc = CNget_1D_double_array_value(ygrid_arr,j,ny);
/* Lower left corner */
xl = (i<=0) ? xc : CNget_1D_double_array_value(xgrid_arr,(i-1),nx);
yl = (j<=0) ? yc : CNget_1D_double_array_value(ygrid_arr,(j-1),ny);
x = xc - 0.5*(xc-xl);
y = yc - 0.5*(yc-yl);
z = 0.0;
pt = CNinsert_point(pointhead,pointtail,x,y,z,ptID++);
CNset_pointptr_array_value(ptarr,i,j,nx+1,ny+1,&pt);
}
/* create a list of nodes and rectangles */
for (i=0; i<nx; i++)
for (j=0; j<ny; j++) {
/* All 4 nodes share same t-value */
t = CNget_1D_double_array_value(zgrid_arr,(i+j*nx),nx*ny);
/* 4 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j ,nx+1,ny+1);
nd00 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i ,j+1,nx+1,ny+1);
nd01 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j ,nx+1,ny+1);
nd10 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j+1,nx+1,ny+1);
nd11 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create the rectangle */
(void) CNinsert_rect(recthead,recttail,
nd00,nd01,nd11,nd10,rtID++);
}
/* free the temp arrays */
CNfree_pointptr_array(ptarr);
}
/*
* convert the rectangular array into a linked list of triangles
* Each rectangle is split into 2 triangles
*/
/*ARGSUSED*/
static void convert_rect_to_tria2(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve)
CNpointptr *pointhead, *pointtail;
CNnodeptr *nodehead, *nodetail;
CNtriaptr *triahead, *triatail;
CNrectptr *recthead, *recttail;
double *xgrid_arr, xmin, xmax; /* 1D data array x[i] */
double *ygrid_arr, ymin, ymax; /* 1D data array y[j] */
double *zgrid_arr, zmin, zmax; /* 1D data array z[i,j] */
int nx, ny, nz; /* #x and y gridpoints */
int joincurve; /* Boundary interpolation */
{
CNpointptr pt;
CNnodeptr *ndarr;
CNnodeptr nd, nd00, nd01, nd10, nd11;
double x,y,z,t;
int i, j, istart, iend, jstart, jend;
int ptID=0, ndID=0, trID=0;
/*
* If the contours are to be joined at the boundary, then
* there must be a boundary layer around the contour box.
* Create a bunch of triangles filling up this boundary layer.
*
* The array normally goes from x[1]..x[nx]
* Boundary values are x[0], x[nx+1]
*/
if (joincurve != CN_NONE) {
istart = 0;
jstart = 0;
iend = nx+2;
jend = ny+2;
} else {
istart = 1;
jstart = 1;
iend = nx+1;
jend = ny+1;
}
/* create node array */
ndarr = CNcreate_nodeptr_array(nx+2,ny+2);
/* create a list of nodes */
for (i=1; i<nx+1; i++)
for (j=1; j<ny+1; j++) {
x = CNget_1D_double_array_value(xgrid_arr,(i-1),nx);
y = CNget_1D_double_array_value(ygrid_arr,(j-1),ny);
z = 0.0;
t = CNget_1D_double_array_value(zgrid_arr,((i-1)+(j-1)*nx),nx*ny);
pt = CNinsert_point(pointhead,pointtail,x,y,z,ptID++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
}
/* create a list of nodes at the boundary */
if (joincurve != CN_NONE)
create_boundary_nodes(ndarr,
nodehead,nodetail,&ndID,
pointhead,pointtail,&ptID,
xmin,xmax,ymin,ymax,zmin,zmax,
xgrid_arr,ygrid_arr,nx,ny,joincurve);
/* create a list of triangles */
for (i=istart; i<iend-1; i++)
for (j=jstart; j<jend-1; j++) {
nd00 = CNget_nodeptr_array_value(ndarr,i ,j ,nx+2,ny+2);
nd01 = CNget_nodeptr_array_value(ndarr,i ,j+1,nx+2,ny+2);
nd10 = CNget_nodeptr_array_value(ndarr,i+1,j ,nx+2,ny+2);
nd11 = CNget_nodeptr_array_value(ndarr,i+1,j+1,nx+2,ny+2);
(void) CNinsert_tria(triahead,triatail,
nd00,nd01,nd10,0,trID++);
(void) CNinsert_tria(triahead,triatail,
nd11,nd01,nd10,0,trID++);
}
/* free the temp arrays */
CNfree_nodeptr_array(ndarr);
}
/*
* convert the rectangular array into a linked list of triangles
* Each rectangle is split into 4 triangles
*/
/*ARGSUSED*/
static void convert_rect_to_tria4(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve)
CNpointptr *pointhead, *pointtail;
CNnodeptr *nodehead, *nodetail;
CNtriaptr *triahead, *triatail;
CNrectptr *recthead, *recttail;
double *xgrid_arr, xmin, xmax; /* 1D data array x[i] */
double *ygrid_arr, ymin, ymax; /* 1D data array y[j] */
double *zgrid_arr, zmin, zmax; /* 1D data array z[i,j] */
int nx, ny, nz; /* #x and y gridpoints */
int joincurve; /* Boundary interpolation */
{
CNpointptr pt;
CNnodeptr *ndarr, *ndmarr;
CNnodeptr nd00, nd01, nd10, nd11, nd, ndmp;
double x, y, z, t;
int i, j, istart, iend, jstart, jend;
int ptID=0, ndID=0, trID=0;
/*
* If the contours are to be joined at the boundary, then
* there must be a boundary layer around the contour box.
* Create a bunch of triangles filling up this boundary layer.
*
* The array normally goes from x[1]..x[nx]
* Boundary values are x[0], x[nx+1]
*/
if (joincurve != CN_NONE) {
istart = 0;
jstart = 0;
iend = nx+2;
jend = ny+2;
} else {
istart = 1;
jstart = 1;
iend = nx+1;
jend = ny+1;
}
/* create node array */
ndarr = CNcreate_nodeptr_array(nx+2,ny+2);
ndmarr = CNcreate_nodeptr_array(nx+2,ny+2);
/* create a list of nodes at the grid intersections */
for (i=1; i<nx+1; i++)
for (j=1; j<ny+1; j++) {
x = CNget_1D_double_array_value(xgrid_arr,(i-1),nx);
y = CNget_1D_double_array_value(ygrid_arr,(j-1),ny);
z = 0.0;
t = CNget_1D_double_array_value(zgrid_arr,((i-1)+(j-1)*nx),nx*ny);
pt = CNinsert_point(pointhead,pointtail,x,y,z,ptID++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
}
/* create a list of nodes at the boundary */
if (joincurve != CN_NONE)
create_boundary_nodes(ndarr,
nodehead,nodetail,&ndID,
pointhead,pointtail,&ptID,
xmin,xmax,ymin,ymax,zmin,zmax,
xgrid_arr,ygrid_arr,nx,ny,joincurve);
/* create a list of nodes at the grid midpoints */
for (i=istart; i<iend-1; i++)
for (j=jstart; j<jend-1; j++) {
nd00 = CNget_nodeptr_array_value(ndarr,i ,j ,nx+2,ny+2);
nd01 = CNget_nodeptr_array_value(ndarr,i ,j+1,nx+2,ny+2);
nd10 = CNget_nodeptr_array_value(ndarr,i+1,j ,nx+2,ny+2);
nd11 = CNget_nodeptr_array_value(ndarr,i+1,j+1,nx+2,ny+2);
x = 0.50*(nd00->coord->x + nd10->coord->x);
y = 0.50*(nd00->coord->y + nd01->coord->y);
z = 0.25*(nd00->coord->z + nd01->coord->z +
nd10->coord->z + nd11->coord->z);
t = 0.25*(nd00->t + nd01->t +
nd10->t + nd11->t );
pt = CNinsert_point(pointhead,pointtail,x,y,z,ptID++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
CNset_nodeptr_array_value(ndmarr,i,j,nx+2,ny+2,&nd);
}
/* create a list of triangles */
for (i=istart; i<iend-1; i++)
for (j=jstart; j<jend-1; j++) {
ndmp = CNget_nodeptr_array_value(ndmarr,i ,j ,nx+2,ny+2);
nd00 = CNget_nodeptr_array_value(ndarr, i ,j ,nx+2,ny+2);
nd01 = CNget_nodeptr_array_value(ndarr, i ,j+1,nx+2,ny+2);
nd10 = CNget_nodeptr_array_value(ndarr, i+1,j ,nx+2,ny+2);
nd11 = CNget_nodeptr_array_value(ndarr, i+1,j+1,nx+2,ny+2);
(void) CNinsert_tria(triahead,triatail,
nd00,nd10,ndmp,0,trID++);
(void) CNinsert_tria(triahead,triatail,
nd10,nd11,ndmp,0,trID++);
(void) CNinsert_tria(triahead,triatail,
nd11,nd01,ndmp,0,trID++);
(void) CNinsert_tria(triahead,triatail,
nd01,nd00,ndmp,0,trID++);
}
/* free the temp arrays */
CNfree_nodeptr_array(ndarr);
CNfree_nodeptr_array(ndmarr);
}
/* create a list of nodes and points at the boundary */
static void create_boundary_nodes(ndarr,
nodehead,nodetail,ndID,
pointhead,pointtail,ptID,
xmin,xmax,ymin,ymax,zmin,zmax,
xgrid_arr, ygrid_arr,
nx, ny, joincurve)
CNnodeptr *ndarr, *nodehead, *nodetail;
CNpointptr *pointhead, *pointtail;
int *ndID, *ptID;
double xmin, xmax, ymin, ymax, zmax, zmin;
double *xgrid_arr; /* 1D data array x[i] */
double *ygrid_arr; /* 1D data array y[j] */
int nx, ny, joincurve;
{
CNnodeptr nd;
CNpointptr pt;
double dx, dy, deltax, deltay, ttarget;
double x, y, z, t;
int i, j;
/* Unit grid size */
dx = (xmax-xmin)/(double)(nx-1);
dy = (ymax-ymin)/(double)(ny-1);
/* determine if the boundary layer is a min or a maxima */
if (joincurve == CN_HIGH)
ttarget = zmax;
else
ttarget = zmin;
/* The width of the boundary */
deltax = deltay = 1.0e-3*((dx > dy) ? dy : dx);
if (xgrid_arr[0] > xgrid_arr[nx-1]) deltax = -1*deltax;
if (ygrid_arr[0] > ygrid_arr[ny-1]) deltay = -1*deltay;
/* fill a boundary layer for i=0/nx+1, variable j */
for (j=0; j<ny+2; j++) {
if (j==0 ) y = ygrid_arr[0] - deltay;
else if (j==ny+1) y = ygrid_arr[ny-1] + deltay;
else y = ygrid_arr[j-1];
i = 0;
x = xgrid_arr[0] - deltax;
z = 0.0;
t = ttarget;
pt = CNinsert_point(pointhead,pointtail,x,y,z,(*ptID)++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,(*ndID)++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
i = nx+1;
x = xgrid_arr[nx-1] + deltax;
z = 0.0;
t = ttarget;
pt = CNinsert_point(pointhead,pointtail,x,y,z,(*ptID)++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,(*ndID)++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
}
/* fill a boundary layer for j=0/ny+1, variable i */
for (i=1; i<nx+1; i++) {
j = 0;
x = xgrid_arr[i-1];
y = ygrid_arr[0] - deltay;
z = 0.0;
t = ttarget;
pt = CNinsert_point(pointhead,pointtail,x,y,z,(*ptID)++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,(*ndID)++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
j = ny+1;
x = xgrid_arr[i-1];
y = ygrid_arr[ny-1] + deltay;
z = 0.0;
t = ttarget;
pt = CNinsert_point(pointhead,pointtail,x,y,z,(*ptID)++);
nd = CNinsert_tailnode(nodehead,nodetail,pt,t,(*ndID)++);
CNset_nodeptr_array_value(ndarr,i,j,nx+2,ny+2,&nd);
}
}
/*
* convert the rectangular array into a linked list of flat rectangles
* or flat triangles. Each rectangle is divided up into a rectangle
* or 2 triangles depending on the integer values of the node t-values.
*/
/*ARGSUSED*/
static void convert_rect_to_mat(pointhead, pointtail,
nodehead, nodetail,
triahead, triatail,
recthead, recttail,
xgrid_arr, nx, xmin, xmax,
ygrid_arr, ny, ymin, ymax,
zgrid_arr, nz, zmin, zmax,
joincurve)
CNpointptr *pointhead, *pointtail;
CNnodeptr *nodehead, *nodetail;
CNtriaptr *triahead, *triatail;
CNrectptr *recthead, *recttail;
double *xgrid_arr, xmin, xmax; /* 1D data array x[i] */
double *ygrid_arr, ymin, ymax; /* 1D data array y[j] */
double *zgrid_arr, zmin, zmax; /* 1D data array z[i,j] */
int nx, ny, nz; /* #x and y gridpoints */
int joincurve; /* Boundary interpolation */
{
CNpointptr pt;
CNpointptr *ptarr;
CNnodeptr nd00, nd01, nd10, nd11;
double x, y, z, t;
double t00, t01, t10, t11;
int i00, i01, i10, i11;
int ierr=0;
int i, j;
int ptID=0, ndID=0, trID=0, rtID=0;
int MATCH_FOUND;
/*
* No boundary - joincurve is ignored
*/
/* create point array */
ptarr = CNcreate_pointptr_array(nx,ny);
/* create a list of points */
for (i=0; i<nx; i++)
for (j=0; j<ny; j++) {
x = CNget_1D_double_array_value(xgrid_arr,i,nx);
y = CNget_1D_double_array_value(ygrid_arr,j,ny);
z = 0.0;
t = CNget_1D_double_array_value(zgrid_arr,i+j*nx,nx*ny);
pt = CNinsert_point(pointhead,pointtail,x,y,z,ptID++);
CNset_pointptr_array_value(ptarr,i,j,nx,ny,&pt);
}
/* create a list of nodes and rectangles */
for (i=0; i<nx-1; i++)
for (j=0; j<ny-1; j++) {
/* Get the t-values for the 4 nodes */
t00 = CNget_1D_double_array_value(zgrid_arr,((i )+(j )*nx),nx*ny);
t01 = CNget_1D_double_array_value(zgrid_arr,((i )+(j+1)*nx),nx*ny);
t10 = CNget_1D_double_array_value(zgrid_arr,((i+1)+(j )*nx),nx*ny);
t11 = CNget_1D_double_array_value(zgrid_arr,((i+1)+(j+1)*nx),nx*ny);
/* Convert to integers */
i00 = (int)fabs(t00);
i01 = (int)fabs(t01);
i10 = (int)fabs(t10);
i11 = (int)fabs(t11);
/* Reset match flag */
MATCH_FOUND = CN_FALSE;
/* If all 4 nodes have a common bit, then there is a single material */
if ((i00 & i01 & i10 & i11) > 0) {
/* Create a single (flat) rectangles with one value */
t = (double)(i00 & i01 & i10 & i11);
/* Create 4 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j ,nx,ny);
nd00 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i ,j+1,nx,ny);
nd01 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j ,nx,ny);
nd10 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j+1,nx,ny);
nd11 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create the rectangle */
(void) CNinsert_rect(recthead,recttail,
nd00,nd01,nd11,nd10,rtID++);
MATCH_FOUND = CN_TRUE;
} else if ( (i00==0 && i01==0 && i10==0 && i11==0) ||
(i00==0 && i01==0) ||
(i01==0 && i11==0) ||
(i11==0 && i10==0) ||
(i10==0 && i00==0) ||
(i00==0 && (i01 & i10 & i11)==0) ||
(i01==0 && (i00 & i10 & i11)==0) ||
(i10==0 && (i00 & i01 & i11)==0) ||
(i11==0 && (i00 & i01 & i10)==0) ) {
/*
* Empty material - fill it with -1
* This occurs if
* (a) all four nodes have 0 values or
* (b) 2 adjacent node have 0 values
* (c) one node has 0 and the other 3 don't have a matching mat
*/
/* Create a single (flat) rectangles with one value */
t = -1.0;
/* Create 4 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j ,nx,ny);
nd00 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i ,j+1,nx,ny);
nd01 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j ,nx,ny);
nd10 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j+1,nx,ny);
nd11 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create the rectangle */
(void) CNinsert_rect(recthead,recttail,
nd00,nd01,nd11,nd10,rtID++);
MATCH_FOUND = CN_TRUE;
} else {
/* OK, there are probably 2 or more materials in this rectangle */
/* Try out 2 different triangle orientations
*
* 01 11 01 11
* ------- -------
* |\ | | /|
* | \ | | / |
* | \ | | / |
* | \ | | / |
* | \| |/ |
* ------- -------
* 00 10 00 10
*/
/* Try the first orientation */
if ( ((i00 & i10 & i11) > 0) || ((i00 & i01 & i11) > 0) ) {
/* First triangle */
if ( ((i00 & i10 & i11) > 0) || (i00==0 || i10==0 || i11==0)) {
t = (double) (i00 & i10 & i11);
if (i00==0 || i10==0 || i11==0) t = -1.0;
/* Create 3 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j ,nx,ny);
nd00 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j ,nx,ny);
nd10 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j+1,nx,ny);
nd11 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create a triangle */
(void) CNinsert_tria(triahead,triatail,
nd00,nd10,nd11,0,trID++);
MATCH_FOUND = CN_TRUE;
}
/* Second triangle */
if ( ((i00 & i01 & i11) > 0) || (i00==0 || i01==0 || i11==0)) {
t = (double) (i00 & i01 & i11);
if (i00==0 || i01==0 || i11==0) t = -1.0;
/* Create 3 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j ,nx,ny);
nd00 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i ,j+1,nx,ny);
nd01 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j+1,nx,ny);
nd11 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create a triangle */
(void) CNinsert_tria(triahead,triatail,
nd00,nd01,nd11,0,trID++);
MATCH_FOUND = CN_TRUE;
}
/* Try another orientation */
} else if ( ((i01 & i00 & i10) > 0) || ((i01 & i11 & i10) > 0) ) {
/* First triangle */
if ( ((i01 & i00 & i10) > 0) || (i01==0 || i00==0 || i10==0)) {
t = (double) (i01 & i00 & i10);
if (i01==0 || i00==0 || i10==0) t = -1.0;
/* Create 3 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j ,nx,ny);
nd00 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i ,j+1,nx,ny);
nd01 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j ,nx,ny);
nd10 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create a triangle */
(void) CNinsert_tria(triahead,triatail,
nd01,nd00,nd10,0,trID++);
MATCH_FOUND = CN_TRUE;
}
/* Second triangle */
if ( ((i01 & i11 & i10) > 0) || (i01==0 || i11==0 || i10==0)) {
t = (double) (i01 & i11 & i10);
if (i01==0 || i11==0 || i10==0) t = -1.0;
/* Create 3 nodes */
pt = CNget_pointptr_array_value(ptarr,i ,j+1,nx,ny);
nd01 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j ,nx,ny);
nd10 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
pt = CNget_pointptr_array_value(ptarr,i+1,j+1,nx,ny);
nd11 = CNinsert_tailnode(nodehead,nodetail,pt,t,ndID++);
/* Create a triangle */
(void) CNinsert_tria(triahead,triatail,
nd01,nd11,nd10,0,trID++);
MATCH_FOUND = CN_TRUE;
}
}
}
if (!MATCH_FOUND) {
ierr++;
(void) fprintf(stderr,"Unable to convert to tria/rect!\n");
(void) fprintf(stderr," p00.t = %7.4f (%4d)\n",t00,i00);
(void) fprintf(stderr," p01.t = %7.4f (%4d)\n",t01,i01);
(void) fprintf(stderr," p10.t = %7.4f (%4d)\n",t10,i10);
(void) fprintf(stderr," p11.t = %7.4f (%4d)\n",t11,i11);
}
}
/* free the temp arrays */
CNfree_pointptr_array(ptarr);
if (ierr > 0) {
(void) fprintf(stderr,"rect_bit_conv - %d errors encountered!\n",ierr);
(void) fprintf(stderr,
"Only managed to convert %d triangles %d rectangles\n",trID,rtID);
}
}
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