src/gen/genrev.c

#ifndef lint
static const char       RCSid[] = "$Id: genrev.c,v 2.10 2008/10/11 04:39:34 greg Exp $";
#endif
/*
 *  genrev.c - program to generate functions of rotation about z
 *
 *      The program takes as input the functions of t for z and r
 *      (the radius).  If z is increasing, the normal points
 *      outward, inward for decreasing z.  Negative radii are forbidden.
 *
 *      8/6/86
 */

#include  <stdlib.h>
#include  <stdio.h>
#include  <string.h>
#include  <math.h>

#include  "rterror.h"
#include  "resolu.h"
#include  "calcomp.h"

#define  ZNAME          "Z`SYS`"                /* z function name */
#define  RNAME          "R`SYS`"                /* r function name */

#define  PI             3.14159265358979323846

#define  FTINY          1e-9
                                        /* orientation */
#define  OUT            01
#define  IN             02
#define  UP             04
#define  DOWN           010


void
computen(nzp, nrp, z0, r0, z1, r1)              /* compute normal */
double  *nzp, *nrp, z0, r0, z1, r1;
{
        double  dr, dz, len;

        dz = r0 - r1;                           /* right angle vector */
        dr = z1 - z0;
        len = sqrt(dr*dr + dz*dz);
        *nzp = dz/len;
        *nrp = dr/len;
}


double
l_hermite(char *nm)
{
        double  t;
        
        t = argument(5);
        return( argument(1)*((2.0*t-3.0)*t*t+1.0) +
                argument(2)*(-2.0*t+3.0)*t*t +
                argument(3)*((t-2.0)*t+1.0)*t +
                argument(4)*(t-1.0)*t*t );
}


double
l_bezier(char *nm)
{
        double  t;

        t = argument(5);
        return( argument(1) * (1.+t*(-3.+t*(3.-t))) +
                argument(2) * 3.*t*(1.+t*(-2.+t)) +
                argument(3) * 3.*t*t*(1.-t) +
                argument(4) * t*t*t );
}


double
l_bspline(char *nm)
{
        double  t;

        t = argument(5);
        return( argument(1) * (1./6.+t*(-1./2.+t*(1./2.-1./6.*t))) +
                argument(2) * (2./3.+t*t*(-1.+1./2.*t)) +
                argument(3) * (1./6.+t*(1./2.+t*(1./2.-1./2.*t))) +
                argument(4) * (1./6.*t*t*t) );
}


int
main(argc, argv)
int  argc;
char  *argv[];
{
        char  stmp[256];
        char  *modname;
        int  smooth = 0;
        double  t, lastz, z, nextz, lastr, r, nextr;
        double  lastnz, lastnr, nz, nr, nextnz, nextnr;
        int  i, nseg;
        int  orient;

        esupport |= E_VARIABLE|E_FUNCTION|E_RCONST;
        esupport &= ~(E_OUTCHAN|E_INCHAN);
        varset("PI", ':', PI);
        funset("hermite", 5, ':', l_hermite);
        funset("bezier", 5, ':', l_bezier);
        funset("bspline", 5, ':', l_bspline);

        if (argc < 6)
                goto userror;

        for (i = 6; i < argc; i++)
                if (!strcmp(argv[i], "-e"))
                        scompile(argv[++i], NULL, 0);
                else if (!strcmp(argv[i], "-f"))
                        fcompile(argv[++i]);
                else if (!strcmp(argv[i], "-s"))
                        smooth = 1;
                else
                        goto userror;

        sprintf(stmp, "%s(t)=%s;", ZNAME, argv[3]);
        scompile(stmp, NULL, 0);
        sprintf(stmp, "%s(t)=%s;", RNAME, argv[4]);
        scompile(stmp, NULL, 0);
        nseg = atoi(argv[5]);
        if (nseg <= 0)
                goto userror;
        modname = smooth ? "Phong" : argv[1];

        fputs("# ", stdout);
        printargs(argc, argv, stdout);
        eclock = 0;

        lastnz = lastnr = 0.0;
        t = 0.0;
        lastz = funvalue(ZNAME, 1, &t);
        lastr = funvalue(RNAME, 1, &t);
        t = 1.0/nseg;
        z = funvalue(ZNAME, 1, &t);
        r = funvalue(RNAME, 1, &t);
        computen(&nz, &nr, lastz, lastr, z, r);
        for (i = 1; i <= nseg; i++) {
                if (i < nseg) {
                        t = (double)(i+1)/nseg;
                        nextz = funvalue(ZNAME, 1, &t);
                        nextr = funvalue(RNAME, 1, &t);
                        computen(&nextnz, &nextnr, z, r, nextz, nextr);
                } else
                        nextnz = nextnr = 0.0;
                orient = 0;
                if (z < lastz-FTINY)
                        orient |= DOWN;
                else if (z > lastz+FTINY)
                        orient |= UP;
                if (r < lastr-FTINY)
                        orient |= IN;
                else if (r > lastr+FTINY)
                        orient |= OUT;
                if (!orient)
                        goto endfor;
                if (smooth) {
                        printf("\n%s texfunc Phong\n", argv[1]);
                        printf("4 rev_dx rev_dy rev_dz rev.cal\n");
                        printf("0\n4\n");
                        if (orient&(UP|DOWN)) {
                                t = (nextnz - lastnz)/(z - lastz);
                                printf("\t%18.12g\t%18.12g\n",
                                                t, lastnz - t*lastz);
                        } else
                                printf("\t0\t%d\n", orient&IN ? 1 : -1);
                        if (orient&(OUT|IN))  {
                                t = (nextnr - lastnr)/(r - lastr);
                                printf("\t%18.12g\t%18.12g\n",
                                                t, lastnr - t*lastr);
                        } else
                                printf("\t0\t%d\n", orient&UP ? 1 : -1);
                }
                if (!(orient&(IN|OUT))) {
                        printf("\n%s %s %s.%d\n", modname,
                                        orient&DOWN ? "tube" : "cylinder",
                                        argv[2], i);
                        printf("0\n0\n7\n");
                        printf("\t0\t0\t%18.12g\n", lastz);
                        printf("\t0\t0\t%18.12g\n", z);
                        printf("\t%18.12g\n", r);
                } else if (!(orient&(UP|DOWN))) {
                        printf("\n%s ring %s.%d\n", modname, argv[2], i);
                        printf("0\n0\n8\n");
                        printf("\t0\t0\t%18.12g\n", z);
                        printf("\t0\t0\t%18.12g\n", orient&IN ? 1.0 : -1.0);
                        printf("\t%18.12g\t%18.12g\n", lastr, r);
                } else {
                        printf("\n%s %s %s.%d\n", modname,
                                        orient&DOWN ? "cup" : "cone",
                                        argv[2], i);
                        printf("0\n0\n8\n");
                        printf("\t0\t0\t%18.12g\n", lastz);
                        printf("\t0\t0\t%18.12g\n", z);
                        printf("\t%18.12g\t%18.12g\n", lastr, r);
                }
        endfor:
                lastz = z; lastr = r;
                z = nextz; r = nextr;
                lastnz = nz; lastnr = nr;
                nz = nextnz; nr = nextnr;
        }
        return 0;

userror:
        fprintf(stderr,
        "Usage: %s material name z(t) r(t) nseg [-e expr] [-f file] [-s]\n",
                        argv[0]);
        return 1;
}


Revision:	2.11
Committed:	Fri Jan 12 00:50:17 2018 UTC (6 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.10:	+3 -1 lines
Log Message:	Added missing esupport settings for constant expression reduction
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.11	static const char RCSid[] = "$Id: genrev.c,v 2.10 2008/10/11 04:39:34 greg Exp $";
3	greg	1.1	#endif
4	greg	1.2	/*
5	greg	1.1	* genrev.c - program to generate functions of rotation about z
6			*
7			* The program takes as input the functions of t for z and r
8			* (the radius). If z is increasing, the normal points
9			* outward, inward for decreasing z. Negative radii are forbidden.
10			*
11			* 8/6/86
12			*/
13
14	schorsch	2.5	#include <stdlib.h>
15	greg	1.1	#include <stdio.h>
16	schorsch	2.5	#include <string.h>
17	greg	2.2	#include <math.h>
18	schorsch	2.7
19			#include "rterror.h"
20	greg	2.8	#include "resolu.h"
21	greg	2.6	#include "calcomp.h"
22	greg	1.1
23	greg	1.10	#define ZNAME "Z`SYS`" /* z function name */
24			#define RNAME "R`SYS`" /* r function name */
25	greg	1.1
26			#define PI 3.14159265358979323846
27
28			#define FTINY 1e-9
29			/* orientation */
30			#define OUT 01
31			#define IN 02
32			#define UP 04
33			#define DOWN 010
34
35
36	schorsch	2.7	void
37	schorsch	2.5	computen(nzp, nrp, z0, r0, z1, r1) /* compute normal */
38			double nzp, nrp, z0, r0, z1, r1;
39			{
40			double dr, dz, len;
41
42			dz = r0 - r1; /* right angle vector */
43			dr = z1 - z0;
44			len = sqrt(drdr + dzdz);
45			*nzp = dz/len;
46			*nrp = dr/len;
47			}
48
49
50			double
51	greg	2.6	l_hermite(char *nm)
52	schorsch	2.5	{
53			double t;
54
55			t = argument(5);
56			return( argument(1)((2.0t-3.0)tt+1.0) +
57			argument(2)(-2.0t+3.0)tt +
58			argument(3)((t-2.0)t+1.0)*t +
59			argument(4)(t-1.0)t*t );
60			}
61
62
63			double
64	greg	2.6	l_bezier(char *nm)
65	schorsch	2.5	{
66			double t;
67
68			t = argument(5);
69			return( argument(1) * (1.+t(-3.+t(3.-t))) +
70			argument(2) * 3.t(1.+t*(-2.+t)) +
71			argument(3) * 3.tt*(1.-t) +
72			argument(4) * ttt );
73			}
74
75
76			double
77	greg	2.6	l_bspline(char *nm)
78	schorsch	2.5	{
79			double t;
80
81			t = argument(5);
82			return( argument(1) * (1./6.+t(-1./2.+t(1./2.-1./6.*t))) +
83			argument(2) * (2./3.+tt(-1.+1./2.*t)) +
84			argument(3) * (1./6.+t(1./2.+t(1./2.-1./2.*t))) +
85			argument(4) * (1./6.tt*t) );
86			}
87
88
89	schorsch	2.7	int
90	greg	1.1	main(argc, argv)
91			int argc;
92			char *argv[];
93			{
94			char stmp[256];
95			char *modname;
96			int smooth = 0;
97			double t, lastz, z, nextz, lastr, r, nextr;
98			double lastnz, lastnr, nz, nr, nextnz, nextnr;
99			int i, nseg;
100			int orient;
101
102	greg	2.11	esupport \|= E_VARIABLE\|E_FUNCTION\|E_RCONST;
103			esupport &= ~(E_OUTCHAN\|E_INCHAN);
104	greg	1.8	varset("PI", ':', PI);
105	greg	1.9	funset("hermite", 5, ':', l_hermite);
106			funset("bezier", 5, ':', l_bezier);
107			funset("bspline", 5, ':', l_bspline);
108	greg	1.1
109			if (argc < 6)
110			goto userror;
111
112			for (i = 6; i < argc; i++)
113			if (!strcmp(argv[i], "-e"))
114	greg	1.7	scompile(argv[++i], NULL, 0);
115	greg	1.1	else if (!strcmp(argv[i], "-f"))
116			fcompile(argv[++i]);
117			else if (!strcmp(argv[i], "-s"))
118			smooth = 1;
119			else
120			goto userror;
121
122			sprintf(stmp, "%s(t)=%s;", ZNAME, argv[3]);
123	greg	1.7	scompile(stmp, NULL, 0);
124	greg	1.1	sprintf(stmp, "%s(t)=%s;", RNAME, argv[4]);
125	greg	1.7	scompile(stmp, NULL, 0);
126	greg	1.1	nseg = atoi(argv[5]);
127			if (nseg <= 0)
128			goto userror;
129	greg	1.3	modname = smooth ? "Phong" : argv[1];
130	greg	1.1
131	greg	2.8	fputs("# ", stdout);
132			printargs(argc, argv, stdout);
133	greg	1.6	eclock = 0;
134	greg	1.1
135			lastnz = lastnr = 0.0;
136			t = 0.0;
137			lastz = funvalue(ZNAME, 1, &t);
138			lastr = funvalue(RNAME, 1, &t);
139			t = 1.0/nseg;
140			z = funvalue(ZNAME, 1, &t);
141			r = funvalue(RNAME, 1, &t);
142			computen(&nz, &nr, lastz, lastr, z, r);
143			for (i = 1; i <= nseg; i++) {
144			if (i < nseg) {
145			t = (double)(i+1)/nseg;
146			nextz = funvalue(ZNAME, 1, &t);
147			nextr = funvalue(RNAME, 1, &t);
148			computen(&nextnz, &nextnr, z, r, nextz, nextr);
149			} else
150			nextnz = nextnr = 0.0;
151			orient = 0;
152			if (z < lastz-FTINY)
153			orient \|= DOWN;
154			else if (z > lastz+FTINY)
155			orient \|= UP;
156			if (r < lastr-FTINY)
157			orient \|= IN;
158			else if (r > lastr+FTINY)
159			orient \|= OUT;
160			if (!orient)
161			goto endfor;
162			if (smooth) {
163	greg	1.3	printf("\n%s texfunc Phong\n", argv[1]);
164	greg	1.1	printf("4 rev_dx rev_dy rev_dz rev.cal\n");
165			printf("0\n4\n");
166			if (orient&(UP\|DOWN)) {
167			t = (nextnz - lastnz)/(z - lastz);
168	greg	2.9	printf("\t%18.12g\t%18.12g\n",
169	greg	1.1	t, lastnz - t*lastz);
170			} else
171			printf("\t0\t%d\n", orient&IN ? 1 : -1);
172			if (orient&(OUT\|IN)) {
173			t = (nextnr - lastnr)/(r - lastr);
174	greg	2.9	printf("\t%18.12g\t%18.12g\n",
175	greg	1.1	t, lastnr - t*lastr);
176			} else
177			printf("\t0\t%d\n", orient&UP ? 1 : -1);
178			}
179			if (!(orient&(IN\|OUT))) {
180			printf("\n%s %s %s.%d\n", modname,
181			orient&DOWN ? "tube" : "cylinder",
182			argv[2], i);
183			printf("0\n0\n7\n");
184	greg	2.9	printf("\t0\t0\t%18.12g\n", lastz);
185			printf("\t0\t0\t%18.12g\n", z);
186			printf("\t%18.12g\n", r);
187	greg	1.1	} else if (!(orient&(UP\|DOWN))) {
188			printf("\n%s ring %s.%d\n", modname, argv[2], i);
189			printf("0\n0\n8\n");
190	greg	2.9	printf("\t0\t0\t%18.12g\n", z);
191			printf("\t0\t0\t%18.12g\n", orient&IN ? 1.0 : -1.0);
192			printf("\t%18.12g\t%18.12g\n", lastr, r);
193	greg	1.1	} else {
194			printf("\n%s %s %s.%d\n", modname,
195			orient&DOWN ? "cup" : "cone",
196			argv[2], i);
197			printf("0\n0\n8\n");
198	greg	2.9	printf("\t0\t0\t%18.12g\n", lastz);
199			printf("\t0\t0\t%18.12g\n", z);
200			printf("\t%18.12g\t%18.12g\n", lastr, r);
201	greg	1.1	}
202			endfor:
203			lastz = z; lastr = r;
204			z = nextz; r = nextr;
205			lastnz = nz; lastnr = nr;
206			nz = nextnz; nr = nextnr;
207			}
208	schorsch	2.7	return 0;
209	greg	1.1
210			userror:
211			fprintf(stderr,
212			"Usage: %s material name z(t) r(t) nseg [-e expr] [-f file] [-s]\n",
213			argv[0]);
214	schorsch	2.7	return 1;
215	greg	1.1	}
216
217