/*
* The code in this file is based on code written and
* copyrighted (C) by Dave Watson. Dr. Watson retains the
* copyright to his original code. Augmentations and changes
* to Dr. Watson's code are copyrighted (C) by UCAR, 1997.
*/
#include <stdlib.h>
#include <math.h>
/*#include <ncarg/ngmath.h>*/
#include "nncheads.h"
#include "nnchead.h"
#include "nntypes.h"
#include "nnexver.h"
#include "nnuheads.h"
#include "nnuhead.h"
void Gradient()
{ int i0, i1, i2, i3;
double u2, wxd, wyd, wxde, wydn, xc, xe, xn;
for (i0=0; i0<datcnt; i0++)
{
FindNeigh(i0);
if (error_status) return;
if (!ext)
{
TriNeigh();
if (error_status) return;
wxd = points[i0][0];
wyd = points[i0][1];
FindProp(wxd,wyd);
if (error_status) return;
xc = Surface();
wxde = wxd + wbit;
FindProp(wxde,wyd);
if (error_status) return;
xe = Surface();
wydn = wyd + wbit;
FindProp(wxd,wydn);
if (error_status) return;
xn = Surface();
points[i0][3] = (xc - xe) / wbit;
points[i0][4] = (xc - xn) / wbit;
asum /= nn_pi;
points[i0][5] = 1 - sqrt(asum /
(asum + SQ(points[i0][2] - xc)));
}
else
{
points[i0][3] = points[i0][4] = points[i0][5] = xx = 0;
cursimp = rootsimp;
for (i1 = 0 ; i1 < numtri ; i1++)
{ cursimp = cursimp->nextsimp;
for (i2=0; i2<2; i2++)
for (i3=0; i3<3; i3++)
work3[i2][i3] =
points[cursimp->vert[0]][i3] -
points[cursimp->vert[i2+1]][i3];
work3[2][0] = work3[0][1] * work3[1][2] -
work3[1][1] * work3[0][2];
work3[2][1] = work3[0][2] * work3[1][0] -
work3[1][2] * work3[0][0];
work3[2][2] = work3[0][0] * work3[1][1] -
work3[1][0] * work3[0][1];
u2 = 1;
if (work3[2][2]<0) u2 = -1;
xx += sqrt(SQ(work3[2][0]) +
SQ(work3[2][1]) + SQ(work3[2][2]));
for (i2=0; i2<3; i2++) points[i0][i2+3] +=
work3[2][i2] * u2;
}
xx = 1 - sqrt(SQ(points[i0][3]) +
SQ(points[i0][4]) +
SQ(points[i0][5])) / xx;
points[i0][3] /= points[i0][5];
points[i0][4] /= points[i0][5];
points[i0][5] = xx;
}
}
for (i0=0; i0<3; i0++)
{ points[datcnt+i0][3] = -bbb;
points[datcnt+i0][4] = -ccc;
points[datcnt+i0][5] = 1;
}
}
void FindNeigh(ipt)
int ipt;
{ int i0, i1, i2, i3, j1, j2, j3, j4, j5;
if (rootsimp->nextsimp EQ NULL)
{
rootsimp->nextsimp = IMakeSimp();
if (error_status) return;
}
cursimp = rootsimp->nextsimp;
cursimp->vert[0] = datcnt;
cursimp->vert[1] = datcnt + 1;
cursimp->vert[2] = datcnt + 2;
cursimp->cent[0] = cursimp->cent[1] = 0.5;
cursimp->cent[2] = BIGNUM;
numtri = 1;
lasttemp = roottemp;
for (i2=0; i2<3; i2++)
{ j1 = 0;
if (j1 EQ i2) j1++;
j2 = j1 + 1;
if (j2 EQ i2) j2++;
if (lasttemp->nexttemp EQ NULL)
{
lasttemp->nexttemp = IMakeTemp();
if (error_status) return;
}
lasttemp = lasttemp->nexttemp;
lasttemp->end[0] = cursimp->vert[j1];
lasttemp->end[1] = cursimp->vert[j2];
}
curtemp = roottemp;
for (i1=0; i1<3; i1++)
{ curtemp = curtemp->nexttemp;
for (i2=0; i2<2; i2++)
{ work3[i2][0] = points[curtemp->end[i2]][0] -
points[ipt][0];
work3[i2][1] = points[curtemp->end[i2]][1] -
points[ipt][1];
work3[i2][2] = work3[i2][0] *
(points[curtemp->end[i2]][0] +
points[ipt][0]) / 2 + work3[i2][1] *
(points[curtemp->end[i2]][1] +
points[ipt][1]) / 2;
}
xx = work3[0][0] * work3[1][1] -
work3[1][0] * work3[0][1];
cursimp->cent[0] = (work3[0][2] * work3[1][1] -
work3[1][2] * work3[0][1]) / xx;
cursimp->cent[1] = (work3[0][0] * work3[1][2] -
work3[1][0] * work3[0][2]) / xx;
cursimp->cent[2] = SQ(points[ipt][0] -
cursimp->cent[0]) + SQ(points[ipt][1] -
cursimp->cent[1]);
cursimp->vert[0] = curtemp->end[0];
cursimp->vert[1] = curtemp->end[1];
cursimp->vert[2] = ipt;
lastsimp = cursimp;
if (cursimp->nextsimp EQ NULL)
{
cursimp->nextsimp = IMakeSimp();
if (error_status) return;
}
cursimp = cursimp->nextsimp;
}
numtri += 2;
for (i0=0; i0<datcnt; i0++)
{ if (i0 NE ipt)
{ j4 = 0;
j3 = -1;
lasttemp = roottemp;
cursimp = rootsimp;
for (i1=0; i1<numtri; i1++)
{ prevsimp = cursimp;
cursimp = cursimp->nextsimp;
xx = cursimp->cent[2] -
SQ(points[i0][0] - cursimp->cent[0]);
if (xx > 0)
{ xx -= SQ(points[i0][1] -
cursimp->cent[1]);
if (xx > 0)
{ j4--;
for (i2=0; i2<3; i2++)
{ j1 = 0;
if (j1 EQ i2) j1++;
j2 = j1 + 1;
if (j2 EQ i2) j2++;
if (j3>1)
{ j5 = j3;
curtemp = roottemp;
for (i3=0; i3<=j5; i3++)
{ prevtemp = curtemp;
curtemp =
curtemp->nexttemp;
if (cursimp->vert[j1] EQ
curtemp->end[0])
{ if (cursimp->vert[j2] EQ
curtemp->end[1])
{ if (curtemp EQ lasttemp)
lasttemp = prevtemp;
else
{ prevtemp->nexttemp =
curtemp->nexttemp;
curtemp->nexttemp =
lasttemp->nexttemp;
lasttemp->nexttemp =
curtemp;
}
j3--;
goto NextOne;
}
}
}
}
if (lasttemp->nexttemp EQ NULL)
{
lasttemp->nexttemp = IMakeTemp();
if (error_status) return;
}
lasttemp = lasttemp->nexttemp;
j3++;
lasttemp->end[0] =
cursimp->vert[j1];
lasttemp->end[1] =
cursimp->vert[j2];
NextOne:; }
if (cursimp EQ lastsimp)
lastsimp = prevsimp;
else
{ prevsimp->nextsimp =
cursimp->nextsimp;
cursimp->nextsimp =
lastsimp->nextsimp;
lastsimp->nextsimp = cursimp;
cursimp = prevsimp;
}
}
}
}
if (j3 > -1)
{ curtemp = roottemp;
cursimp = lastsimp->nextsimp;
for (i1=0; i1<=j3; i1++)
{ curtemp = curtemp->nexttemp;
if (curtemp->end[0] EQ ipt OR
curtemp->end[1] EQ ipt)
{ for (i2=0; i2<2; i2++)
{ work3[i2][0] =
points[curtemp->end[i2]][0] -
points[i0][0];
work3[i2][1] =
points[curtemp->end[i2]][1] -
points[i0][1];
work3[i2][2] = work3[i2][0] *
(points[curtemp->end[i2]][0] +
points[i0][0]) / 2 +
work3[i2][1] *
(points[curtemp->end[i2]][1] +
points[i0][1]) / 2;
}
xx = work3[0][0] * work3[1][1] -
work3[1][0] * work3[0][1];
cursimp->cent[0] = (work3[0][2] *
work3[1][1] - work3[1][2] *
work3[0][1]) / xx;
cursimp->cent[1] = (work3[0][0] *
work3[1][2] - work3[1][0] *
work3[0][2]) / xx;
cursimp->cent[2] =
SQ(points[i0][0] -
cursimp->cent[0]) +
SQ(points[i0][1] -
cursimp->cent[1]);
cursimp->vert[0] = curtemp->end[0];
cursimp->vert[1] = curtemp->end[1];
cursimp->vert[2] = i0;
lastsimp = cursimp;
if (cursimp->nextsimp EQ NULL)
{
cursimp->nextsimp = IMakeSimp();
if (error_status) return;
}
cursimp = cursimp->nextsimp;
j4++;
}
}
numtri += j4;
}
}
}
for (i0=0; i0<datcnt; i0++) jndx[i0] = 0;
cursimp = rootsimp;
for (ext=0, i1=0; i1<numtri; i1++)
{ cursimp = cursimp->nextsimp;
for (i2=0; i2<3; i2++)
{ if (cursimp->vert[i2] < datcnt)
{ if (cursimp->vert[i2] NE ipt)
jndx[cursimp->vert[i2]] = 1;
}
else ext = 1;
}
}
}
void TriNeigh()
{ int i0, i1, i2, i3, j1, j2, j3, j4, j5;
if (rootsimp->nextsimp EQ NULL)
{
rootsimp->nextsimp = IMakeSimp();
if (error_status) return;
}
lastsimp = cursimp = rootsimp->nextsimp;
cursimp->vert[0] = datcnt;
cursimp->vert[1] = datcnt + 1;
cursimp->vert[2] = datcnt + 2;
cursimp->cent[0] = cursimp->cent[1] = 0.5;
cursimp->cent[2] = BIGNUM;
numtri = 1;
for (i0=0; i0<datcnt; i0++)
{ if (jndx[i0])
{ j3 = -1;
lasttemp = roottemp;
cursimp = rootsimp;
for (i1=0; i1<numtri; i1++)
{ prevsimp = cursimp;
cursimp = cursimp->nextsimp;
xx = cursimp->cent[2] -
SQ(points[i0][0] - cursimp->cent[0]);
if (xx > 0)
{ xx -= SQ(points[i0][1] -
cursimp->cent[1]);
if (xx > 0)
{ for (i2=0; i2<3; i2++)
{ j1 = 0;
if (j1 EQ i2) j1++;
j2 = j1 + 1;
if (j2 EQ i2) j2++;
if (j3>1)
{ j5 = j3;
curtemp = roottemp;
for (i3=0; i3<=j5; i3++)
{ prevtemp = curtemp;
curtemp =
curtemp->nexttemp;
if (cursimp->vert[j1] EQ
curtemp->end[0])
{ if (cursimp->vert[j2] EQ
curtemp->end[1])
{ if (curtemp EQ lasttemp)
lasttemp = prevtemp;
else
{ prevtemp->nexttemp =
curtemp->nexttemp;
curtemp->nexttemp =
lasttemp->nexttemp;
lasttemp->nexttemp =
curtemp;
}
j3--;
goto NextOne;
}
}
}
}
if (lasttemp->nexttemp EQ NULL)
{
lasttemp->nexttemp = IMakeTemp();
if (error_status) return;
}
lasttemp = lasttemp->nexttemp;
j3++;
lasttemp->end[0] =
cursimp->vert[j1];
lasttemp->end[1] =
cursimp->vert[j2];
NextOne:; }
if (cursimp EQ lastsimp)
lastsimp = prevsimp;
else
{ prevsimp->nextsimp =
cursimp->nextsimp;
cursimp->nextsimp =
lastsimp->nextsimp;
lastsimp->nextsimp = cursimp;
cursimp = prevsimp;
}
}
}
}
curtemp = roottemp;
cursimp = lastsimp->nextsimp;
for (i1=0; i1<=j3; i1++)
{ curtemp = curtemp->nexttemp;
for (i2=0; i2<2; i2++)
{ work3[i2][0] =
points[curtemp->end[i2]][0] -
points[i0][0];
work3[i2][1] =
points[curtemp->end[i2]][1] -
points[i0][1];
work3[i2][2] = work3[i2][0] *
(points[curtemp->end[i2]][0] +
points[i0][0]) / 2 + work3[i2][1] *
(points[curtemp->end[i2]][1] +
points[i0][1]) / 2;
}
xx = work3[0][0] * work3[1][1] -
work3[1][0] * work3[0][1];
cursimp->cent[0] =
(work3[0][2] * work3[1][1] -
work3[1][2] * work3[0][1]) / xx;
cursimp->cent[1] =
(work3[0][0] * work3[1][2] -
work3[1][0] * work3[0][2]) / xx;
cursimp->cent[2] = SQ(points[i0][0] -
cursimp->cent[0]) + SQ(points[i0][1] -
cursimp->cent[1]);
cursimp->vert[0] = curtemp->end[0];
cursimp->vert[1] = curtemp->end[1];
cursimp->vert[2] = i0;
lastsimp = cursimp;
if (cursimp->nextsimp EQ NULL)
{
cursimp->nextsimp = IMakeSimp();
if (error_status) return;
}
cursimp = cursimp->nextsimp;
}
numtri += 2;
}
}
cursimp = rootsimp;
for (asum=0, i0=0; i0<numtri; i0++)
{ cursimp = cursimp->nextsimp;
for (i1=0; i1<2; i1++)
{ work3[0][i1] = points[cursimp->vert[1]][i1] -
points[cursimp->vert[0]][i1];
work3[1][i1] = points[cursimp->vert[2]][i1] -
points[cursimp->vert[0]][i1];
}
xx = work3[0][0] * work3[1][1] -
work3[0][1] * work3[1][0];
if (xx < 0)
{ j4 = cursimp->vert[2];
cursimp->vert[2] = cursimp->vert[1];
cursimp->vert[1] = j4;
if (cursimp->vert[0] < datcnt)
asum -= xx / 2;
}
else if (cursimp->vert[0] < datcnt)
asum += xx / 2;
}
}
void CircOut()
{
FILE *filer;
int ix,i0;
struct simp *simpaddr;
if (adf)
{
for (i0 = 0; i0 < datcnt; i0++) jndx[i0] = 1;
TriNeigh();
if (error_status) return;
if ((filer = fopen(tri_file,"w")) EQ (FILE *) NULL)
{
ErrorHnd(3, "CircOut", stderr, "\n");
error_status = 3;
return;
}
/*
* Put out defaults for plot control parameters.
*/
fprintf(filer,"/*\n");
fprintf(filer,"/* Integer flags (I5 format).\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer," 8 - GKS workstation type "
"(1=ncgm; 8=X11 window; 20=PostScript).\n");
fprintf(filer," 1 - flags whether axes should be drawn.\n");
fprintf(filer," 0 - Halfax/Grid flag (0=halfax and 1=grid)\n");
fprintf(filer," 1 - Flags whether triangulation should be drawn.\n");
fprintf(filer," 0 - Flags whether a blue dot should be drawn "
"at (0.,0.) [0=no; 1=yes]\n");
fprintf(filer," 0 - Flag to indicate whether the pseudo data "
"should be included in the plot.\n");
fprintf(filer," 1 - Flag indicating whether the natural "
"neighbor circles are drawn.\n");
fprintf(filer," 1 - Flags whether the centers of the natural "
"neighborhood circles are drawn.\n");
fprintf(filer," 1 - Flag indicating if Voronoi polygons should "
"be drawn [0=no; 1=yes].\n");
fprintf(filer," 1 - Flag indicating if the original points are "
"to be marked.\n");
fprintf(filer,"/*\n");
fprintf(filer,"/* Color information (3F7.3 format) as RGB triples\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer," 0.000 0.000 0.000 - background color\n");
fprintf(filer," 1.000 1.000 1.000 - foreground color "
"(used for axes)\n");
fprintf(filer," 1.000 0.000 0.000 - circumcircle color\n");
fprintf(filer," 0.000 1.000 0.000 - color of circumcircle "
"centers\n");
fprintf(filer," 0.000 1.000 1.000 - color for triangulation\n");
fprintf(filer," 1.000 1.000 0.000 - Voronoi polygon color\n");
fprintf(filer," 1.000 1.000 0.000 - color of vertex dots\n");
fprintf(filer," 0.000 0.000 1.000 - color of reference dot\n");
fprintf(filer," 0.000 0.000 1.000 - color for natural neighbor "
"points\n");
fprintf(filer," 1.000 1.000 1.000 - color to mark points where "
"natural neighbors are desired\n");
fprintf(filer,"/*\n");
fprintf(filer,"/* Scale factors (F7.3 format)\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer," 1.000 - scale factor for dots at vertices\n");
fprintf(filer," 1.000 - scale factor for circumcircle centers\n");
fprintf(filer," 2.000 - scale factor for circle lines\n");
fprintf(filer," 2.000 - scale factor for Voronoi polygon lines\n");
fprintf(filer," 2.000 - scale factor for tringulation lines\n");
fprintf(filer," 1.000 - scale factor for axes lines\n");
fprintf(filer," 1.000 - scale factor for points where natural "
"neighbors are desired\n");
fprintf(filer," 1.000 - scale factor for points marking natural "
"neighbors\n");
fprintf(filer,"/*\n");
fprintf(filer,"/* User coordinates for SET call (4E15.3 format), "
"defaults if all zeros\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer," 0.000E+00 0.000E+00 0.000E+00 "
" 0.000E+00\n");
fprintf(filer,"/*\n");
fprintf(filer,"/* Number of user input data. (I5 format)\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer,"%5d\n",datcnt);
fprintf(filer,"/*\n");
fprintf(filer,"/* User data. The datum number occurs first "
"(in I5 format) followed\n");
fprintf(filer,"/* by the x,y,z values (in E15.3 format).\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
for (ix = 0; ix < datcnt; ix++) {
fprintf(filer,"%5d%15.3E%15.3E%15.3E\n",
ix+1,points[ix][0],points[ix][1],points[ix][2]);
}
fprintf(filer,"/*\n");
fprintf(filer,"/* Pseudo data.\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
for (ix = datcnt; ix < datcnt+3; ix++) {
fprintf(filer,"%5d%15.3E%15.3E%15.3E\n",
ix+1,points[ix][0],points[ix][1],points[ix][2]);
}
fprintf(filer,"/*\n");
fprintf(filer,"/* The number of circumcircles (I5 format).\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
simpaddr = rootsimp->nextsimp;
fprintf(filer,"%5d\n",numtri);
fprintf(filer,"/*\n");
fprintf(filer,"/* Circumcircle data. The first three numbers are "
"the numbers of the\n");
fprintf(filer,"/* data (as listed above) lying on the "
"circumcircle; the next two\n");
fprintf(filer,"/* numbers give the center position of the "
"circumcircle; the final\n");
fprintf(filer,"/* number is the square of the radius of the "
"circumcircle.\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
for (ix = 0; ix < numtri; ix++) {
fprintf(filer,"%5d%5d%5d%15.3E%15.3E%15.3E\n",
simpaddr->vert[0]+1,simpaddr->vert[1]+1,simpaddr->vert[2]+1,
simpaddr->cent[0],simpaddr->cent[1],simpaddr->cent[2]);
simpaddr = simpaddr->nextsimp;
}
fprintf(filer,"/*\n");
fprintf(filer,"/* Number of points where natural neighbors are "
"to be marked and\n");
fprintf(filer,"/* a flag indicating whether just the points where "
"first order neighbors\n");
fprintf(filer,"/* are desired are marked (-1), whether the first "
" order neighbors \n");
fprintf(filer,"/* will be marked as well (0), or both first and "
"second order neighbors\n");
fprintf(filer,"/* are marked (1). The points will be marked with "
"Xs, in the\n");
fprintf(filer,"/* color described above. (2I5 format)\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer," 0 0\n");
fprintf(filer,"/*\n");
fprintf(filer,"/* The coordinate list of points whose natural "
"neighbors are to\n");
fprintf(filer,"/* be displayed (using the color index as described "
"above), should\n");
fprintf(filer,"/* be listed here in 2E15.3 format.\n");
fprintf(filer,"/*\n");
fprintf(filer,"/*..+....1....+....2....+....3....+....4"
"....+....5....+....6....+....7....+....8\n");
fprintf(filer,"/* 0.000E-00 0.000E-00\n");
fclose(filer);
return;
}
}
void FindProp(wxd, wyd)
double wxd, wyd;
{ int i2, i3, i4, pos_count, inside;
double xx, work3[3][3], work4[3][2];
lastneig = rootneig;
goodflag = 0;
numnei = -1;
cursimp = rootsimp;
for (i2=0; i2<numtri; i2++)
{ cursimp = cursimp->nextsimp;
xx = cursimp->cent[2] -
SQ(wxd - cursimp->cent[0]);
if (xx > 0)
{ xx -= SQ(wyd - cursimp->cent[1]);
if (xx > 0)
{ inside = 0;
if (cursimp->vert[0] < datcnt) inside = 1;
for (i3=0; i3<3; i3++)
{ for (i4=0; i4<2; i4++)
{ work3[i4][0] =
points[cursimp->
vert[scor[i3][i4]]][0] - wxd;
work3[i4][1] =
points[cursimp->
vert[scor[i3][i4]]][1] - wyd;
work3[i4][2] = work3[i4][0] *
(points[cursimp->
vert[scor[i3][i4]]][0] +
wxd) / 2 + work3[i4][1] *
(points[cursimp->
vert[scor[i3][i4]]][1] +
wyd) / 2;
}
xx = work3[0][0] * work3[1][1] -
work3[1][0] * work3[0][1];
work4[i3][0] = (work3[0][2] *
work3[1][1] - work3[1][2] *
work3[0][1]) / xx;
work4[i3][1] = (work3[0][0] *
work3[1][2] - work3[1][0] *
work3[0][2]) / xx;
}
pos_count = 0;
for (i3=0; i3<3; i3++)
{ work3[2][i3] =
((work4[scor[i3][0]][0] -
cursimp->cent[0]) *
(work4[scor[i3][1]][1] -
cursimp->cent[1]) -
(work4[scor[i3][1]][0] -
cursimp->cent[0]) *
(work4[scor[i3][0]][1] -
cursimp->cent[1])) / 2;
if (work3[2][i3]>0) pos_count++;
}
if (pos_count>2 AND inside) goodflag = 1;
for (i3=0; i3<3; i3++)
{ if (numnei>1)
{ curneig = rootneig;
for (i4=0; i4<=numnei; i4++)
{ curneig = curneig->nextneig;
if (cursimp->vert[i3] EQ
curneig->neinum)
{ curneig->narea +=
work3[2][i3];
goto GOTEM;
}
}
}
if (lastneig->nextneig EQ NULL)
{
lastneig->nextneig = IMakeNeig();
if (error_status) return;
}
lastneig = lastneig->nextneig;
numnei++;
lastneig->neinum = cursimp->vert[i3];
lastneig->narea = work3[2][i3];
GOTEM:; }
}
}
}
}
double Surface()
{ int i0;
double xx, asurf;
curneig = rootneig;
for (xx=0, i0=0; i0<=numnei; i0++)
{ curneig = curneig->nextneig;
xx += curneig->narea;
}
curneig = rootneig;
for (asurf=0, i0=0; i0<=numnei; i0++)
{ curneig = curneig->nextneig;
curneig->narea /= xx;
asurf += curneig->narea *
points[curneig->neinum][2];
}
if (jwts == 1) {
num_wts = numnei+1;
curneig = rootneig;
for (i0=0; i0 <= numnei; i0++) {
curneig = curneig->nextneig;
nbrs[i0] = curneig->neinum;
wts[i0] = curneig->narea;
}
}
return asurf;
}
double Meld(double asurf, double wxd, double wyd)
{ int i0;
double rS, rT, rB, bD, bB, hP;
curneig = rootneig;
for (i0 = 0 ; i0 <= numnei ; i0++)
{
curneig = curneig->nextneig;
curneig->coord = 0;
if (curneig->narea>0.00001 AND curneig->narea < 2)
{
if (fabs(points[curneig->neinum][5]) > 0.00001)
{
rS = fabs(points[curneig->neinum][5]) + bI;
rT = rS * bJ;
rB = 1 / rT;
bD = pow(curneig->narea, rT);
bB = bD * 2;
if (bD>0.5) bB = (1 - bD) * 2;
bB = pow(bB, rS) / 2;
if (bD>0.5) bB = 1 - bB;
hP = pow(bB, rB);
curneig->coord =
((points[curneig->neinum][3] *
points[curneig->neinum][0] +
points[curneig->neinum][4] *
points[curneig->neinum][1] +
points[curneig->neinum][2] -
points[curneig->neinum][3] *
wxd -
points[curneig->neinum][4] *
wyd) - asurf) * hP;
}
}
}
curneig = rootneig;
for (i0=0; i0<=numnei; i0++)
{ curneig = curneig->nextneig;
asurf += curneig->coord;
}
return asurf;
}
void TooSteep()
{
ErrorHnd(4,"TooSteep", stderr, "\n");
igrad = 0;
}
void TooShallow()
{
ErrorHnd(5,"TooShallow", stderr, "\n");
igrad = 0;
}
void TooNarrow()
{
ErrorHnd(6, "TooNarrow", stderr, "\n");
igrad = 0;
}
int *IntVect(int ncols)
{
int *vectptr;
if ((vectptr = (int *) malloc(ncols * sizeof(int))) EQ (int *) NULL)
{
error_status = 7;
ErrorHnd(error_status, "IntVect", stderr, "\n");
vectptr = (int *) NULL;
}
return vectptr;
}
void FreeVecti(int *vectptr)
{
free(vectptr);
}
double *DoubleVect(int ncols)
{
double *vectptr;
if ((vectptr = (double *)
malloc(ncols * sizeof(double))) EQ (double *) NULL)
{
error_status = 8;
ErrorHnd(error_status, "DoubleVect", stderr, "\n");
return ( (double *) NULL);
}
return vectptr;
}
void FreeVectd(double *vectptr)
{
free(vectptr);
}
int **IntMatrix(int nrows, int ncols)
{ int i0;
int **matptr;
if (nrows < 2) nrows = 2;
if (ncols < 2) ncols = 2;
if ((matptr = (int **)
malloc(nrows * sizeof(int *))) EQ (int **) NULL)
{
error_status = 9;
ErrorHnd(error_status, "IntMatrix", stderr, "\n");
return ( (int **) NULL);
}
if ((matptr[0] = (int *)
malloc(nrows * ncols * sizeof(int))) EQ (int *) NULL)
{
error_status = 10;
ErrorHnd(error_status, "IntMatrix", stderr, "\n");
return ( (int **) NULL);
}
for (i0=1; i0<nrows; i0++)
matptr[i0] = matptr[0] + i0 * ncols;
return matptr;
}
void FreeMatrixi(int **matptr)
{
free(matptr[0]); /* added 1/1/95 */
free(matptr);
}
float **FloatMatrix(int nrows, int ncols)
{ int i0;
float **matptr;
if (nrows < 2) nrows = 2;
if (ncols < 2) ncols = 2;
if ((matptr = (float **)
malloc(nrows * sizeof(float *))) EQ (float **) NULL)
{
error_status = 11;
ErrorHnd(error_status, "FloatMatrix", stderr, "\n");
return ( (float **) NULL);
}
if ((matptr[0] = (float *)
malloc(nrows * ncols * sizeof(float))) EQ (float *) NULL)
{
error_status = 12;
ErrorHnd(error_status, "FloatMatrix", stderr, "\n");
return ( (float **) NULL);
}
for (i0=1; i0<nrows; i0++)
matptr[i0] = matptr[0] + i0 * ncols;
return matptr;
}
void FreeMatrixf(float **matptr)
{
free(matptr[0]); /* added 1/1/95 */
free(matptr);
}
double **DoubleMatrix(int nrows, int ncols)
{
int i0;
double **matptr;
if (nrows < 2) nrows = 2;
if (ncols < 2) ncols = 2;
if ((matptr = (double **)
malloc(nrows * sizeof(double *))) EQ (double **) NULL)
{
error_status = 13;
ErrorHnd(error_status, "DoubleMatrix", stderr, "\n");
return ( (double **) NULL);
}
if ((matptr[0] = (double *)
malloc(nrows * ncols * sizeof(double))) EQ (double *) NULL)
{
error_status = 14;
ErrorHnd(error_status, "DoubleMatrix", stderr, "\n");
return ( (double **) NULL);
}
for (i0 = 1; i0 < nrows; i0++)
matptr[i0] = matptr[0] + i0 * ncols;
return matptr;
}
void FreeMatrixd(double **matptr)
{
free(matptr[0]); /* added 1/1/95 */
free(matptr);
}
struct datum *IMakeDatum()
{
struct datum *datptr;
if ((datptr = (struct datum *)
malloc(sizeof(struct datum))) EQ (struct datum *) NULL)
{
error_status = 15;
ErrorHnd(error_status, "IMakeDatum", stderr, "\n");
return ((struct datum *) NULL);
}
datptr->nextdat = NULL;
return datptr;
}
struct simp *IMakeSimp()
{
struct simp *simpptr;
if ((simpptr = (struct simp *)
malloc(sizeof(struct simp))) EQ (struct simp *) NULL)
{
error_status = 16;
ErrorHnd(error_status, "IMakeSimp", stderr, "\n");
return ((struct simp *) NULL);
}
simpptr->nextsimp = NULL;
return (simpptr);
}
struct temp *IMakeTemp()
{
struct temp *tempptr;
if ((tempptr = (struct temp *)
malloc(sizeof(struct temp))) EQ (struct temp *) NULL)
{
error_status = 17;
ErrorHnd(error_status, "IMakeTemp", stderr, "\n");
return ((struct temp *) NULL);
}
tempptr->nexttemp = NULL;
return tempptr;
}
struct neig *IMakeNeig()
{
struct neig *neigptr;
if ((neigptr = (struct neig *)
malloc(sizeof(struct neig))) EQ (struct neig *) NULL)
{
error_status = 18;
ErrorHnd(error_status, "IMakeNeig", stderr, "\n");
return ((struct neig *) NULL);
}
neigptr->nextneig = NULL;
return neigptr;
}
