| 1 |
– |
/* |
| 2 |
– |
|
| 1 |
|
#ifndef lint |
| 2 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 3 |
|
#endif |
| 4 |
+ |
|
| 5 |
+ |
/* Copyright (c) 1989 Regents of the University of California */ |
| 6 |
+ |
|
| 7 |
+ |
/* |
| 8 |
|
* genrev.c - program to generate functions of rotation about z |
| 9 |
|
* |
| 10 |
|
* The program takes as input the functions of t for z and r |
| 15 |
|
*/ |
| 16 |
|
|
| 17 |
|
#include <stdio.h> |
| 18 |
+ |
#include <math.h> |
| 19 |
|
|
| 20 |
< |
#define ZNAME "Z_" /* z function name */ |
| 21 |
< |
#define RNAME "R_" /* r function name */ |
| 20 |
> |
#define ZNAME "Z`SYS`" /* z function name */ |
| 21 |
> |
#define RNAME "R`SYS`" /* r function name */ |
| 22 |
|
|
| 23 |
|
#define PI 3.14159265358979323846 |
| 24 |
|
|
| 29 |
|
#define UP 04 |
| 30 |
|
#define DOWN 010 |
| 31 |
|
|
| 32 |
< |
double funvalue(), l_hermite(), argument(); |
| 32 |
> |
double funvalue(), l_hermite(), l_bezier(), l_bspline(), argument(); |
| 33 |
|
|
| 34 |
|
|
| 35 |
|
main(argc, argv) |
| 36 |
|
int argc; |
| 37 |
|
char *argv[]; |
| 38 |
|
{ |
| 39 |
+ |
extern long eclock; |
| 40 |
|
char stmp[256]; |
| 41 |
|
char *modname; |
| 42 |
|
int smooth = 0; |
| 45 |
|
int i, nseg; |
| 46 |
|
int orient; |
| 47 |
|
|
| 48 |
< |
varset("PI", PI); |
| 49 |
< |
funset("hermite", 5, l_hermite); |
| 48 |
> |
varset("PI", ':', PI); |
| 49 |
> |
funset("hermite", 5, ':', l_hermite); |
| 50 |
> |
funset("bezier", 5, ':', l_bezier); |
| 51 |
> |
funset("bspline", 5, ':', l_bspline); |
| 52 |
|
|
| 53 |
|
if (argc < 6) |
| 54 |
|
goto userror; |
| 55 |
|
|
| 56 |
|
for (i = 6; i < argc; i++) |
| 57 |
|
if (!strcmp(argv[i], "-e")) |
| 58 |
< |
scompile(NULL, argv[++i]); |
| 58 |
> |
scompile(argv[++i], NULL, 0); |
| 59 |
|
else if (!strcmp(argv[i], "-f")) |
| 60 |
|
fcompile(argv[++i]); |
| 61 |
|
else if (!strcmp(argv[i], "-s")) |
| 64 |
|
goto userror; |
| 65 |
|
|
| 66 |
|
sprintf(stmp, "%s(t)=%s;", ZNAME, argv[3]); |
| 67 |
< |
scompile(NULL, stmp); |
| 67 |
> |
scompile(stmp, NULL, 0); |
| 68 |
|
sprintf(stmp, "%s(t)=%s;", RNAME, argv[4]); |
| 69 |
< |
scompile(NULL, stmp); |
| 69 |
> |
scompile(stmp, NULL, 0); |
| 70 |
|
nseg = atoi(argv[5]); |
| 71 |
|
if (nseg <= 0) |
| 72 |
|
goto userror; |
| 73 |
< |
modname = smooth ? "phong" : argv[1]; |
| 73 |
> |
modname = smooth ? "Phong" : argv[1]; |
| 74 |
|
|
| 75 |
|
printhead(argc, argv); |
| 76 |
+ |
eclock = 0; |
| 77 |
|
|
| 78 |
|
lastnz = lastnr = 0.0; |
| 79 |
|
t = 0.0; |
| 103 |
|
if (!orient) |
| 104 |
|
goto endfor; |
| 105 |
|
if (smooth) { |
| 106 |
< |
printf("\n%s texfunc phong\n", argv[1]); |
| 106 |
> |
printf("\n%s texfunc Phong\n", argv[1]); |
| 107 |
|
printf("4 rev_dx rev_dy rev_dz rev.cal\n"); |
| 108 |
|
printf("0\n4\n"); |
| 109 |
|
if (orient&(UP|DOWN)) { |
| 161 |
|
computen(nzp, nrp, z0, r0, z1, r1) /* compute normal */ |
| 162 |
|
double *nzp, *nrp, z0, r0, z1, r1; |
| 163 |
|
{ |
| 157 |
– |
extern double sqrt(); |
| 164 |
|
double dr, dz, len; |
| 165 |
|
|
| 166 |
|
dz = r0 - r1; /* right angle vector */ |
| 214 |
|
argument(2)*(-2.0*t+3.0)*t*t + |
| 215 |
|
argument(3)*((t-2.0)*t+1.0)*t + |
| 216 |
|
argument(4)*(t-1.0)*t*t ); |
| 217 |
+ |
} |
| 218 |
+ |
|
| 219 |
+ |
|
| 220 |
+ |
double |
| 221 |
+ |
l_bezier() |
| 222 |
+ |
{ |
| 223 |
+ |
double t; |
| 224 |
+ |
|
| 225 |
+ |
t = argument(5); |
| 226 |
+ |
return( argument(1) * (1.+t*(-3.+t*(3.-t))) + |
| 227 |
+ |
argument(2) * 3.*t*(1.+t*(-2.+t)) + |
| 228 |
+ |
argument(3) * 3.*t*t*(1.-t) + |
| 229 |
+ |
argument(4) * t*t*t ); |
| 230 |
+ |
} |
| 231 |
+ |
|
| 232 |
+ |
|
| 233 |
+ |
double |
| 234 |
+ |
l_bspline() |
| 235 |
+ |
{ |
| 236 |
+ |
double t; |
| 237 |
+ |
|
| 238 |
+ |
t = argument(5); |
| 239 |
+ |
return( argument(1) * (1./6.+t*(-1./2.+t*(1./2.-1./6.*t))) + |
| 240 |
+ |
argument(2) * (2./3.+t*t*(-1.+1./2.*t)) + |
| 241 |
+ |
argument(3) * (1./6.+t*(1./2.+t*(1./2.-1./2.*t))) + |
| 242 |
+ |
argument(4) * (1./6.*t*t*t) ); |
| 243 |
|
} |
