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greg |
1.1 |
/* Copyright (c) 1994 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* Parse an MGF file, converting or discarding unsupported entities |
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*/ |
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#include <stdio.h> |
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#include <math.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include "parser.h" |
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#include "lookup.h" |
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#include "messages.h" |
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/* |
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* Global definitions of variables declared in parser.h |
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*/ |
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/* entity names */ |
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char mg_ename[MG_NENTITIES][MG_MAXELEN] = MG_NAMELIST; |
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/* Handler routines for each entity */ |
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int (*mg_ehand[MG_NENTITIES])(); |
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/* error messages */ |
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char *mg_err[MG_NERRS] = MG_ERRLIST; |
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MG_FCTXT *mg_file; /* current file context pointer */ |
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int mg_nqcdivs = MG_NQCD; /* number of divisions per quarter circle */ |
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/* |
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* The idea with this parser is to compensate for any missing entries in |
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* mg_ehand with alternate handlers that express these entities in terms |
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* of others that the calling program can handle. |
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* |
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* In some cases, no alternate handler is possible because the entity |
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* has no approximate equivalent. These entities are simply discarded. |
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* |
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* Certain entities are dependent on others, and mg_init() will fail |
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* if the supported entities are not consistent. |
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* |
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* Some alternate entity handlers require that earlier entities be |
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* noted in some fashion, and we therefore keep another array of |
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* parallel support handlers to assist in this effort. |
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*/ |
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/* temporary settings for testing */ |
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#define e_ies e_any_toss |
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greg |
1.4 |
#define e_cmix e_any_toss |
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#define e_cspec e_any_toss |
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greg |
1.1 |
/* alternate handler routines */ |
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static int e_any_toss(), /* discard unneeded entity */ |
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greg |
1.2 |
e_ies(), /* IES luminaire file */ |
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greg |
1.1 |
e_include(), /* include file */ |
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e_sph(), /* sphere */ |
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greg |
1.4 |
e_cmix(), /* color mixtures */ |
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e_cspec(); /* color spectra */ |
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greg |
1.1 |
e_cyl(), /* cylinder */ |
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e_cone(), /* cone */ |
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greg |
1.4 |
e_prism(), /* prism */ |
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greg |
1.1 |
e_ring(), /* ring */ |
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e_torus(); /* torus */ |
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/* alternate handler support functions */ |
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static int (*e_supp[MG_NENTITIES])(); |
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static char FLTFMT[] = "%.12g"; |
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static int warpconends; /* hack for generating good normals */ |
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void |
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mg_init() /* initialize alternate entity handlers */ |
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{ |
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unsigned long ineed = 0, uneed = 0; |
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register int i; |
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/* pick up slack */ |
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if (mg_ehand[MG_E_IES] == NULL) |
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mg_ehand[MG_E_IES] = e_ies; |
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if (mg_ehand[MG_E_INCLUDE] == NULL) |
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mg_ehand[MG_E_INCLUDE] = e_include; |
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if (mg_ehand[MG_E_SPH] == NULL) { |
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mg_ehand[MG_E_SPH] = e_sph; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_CYL] == NULL) { |
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mg_ehand[MG_E_CYL] = e_cyl; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_CONE] == NULL) { |
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mg_ehand[MG_E_CONE] = e_cone; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_RING] == NULL) { |
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mg_ehand[MG_E_RING] = e_ring; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX|1<<MG_E_XF; |
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greg |
1.4 |
if (mg_ehand[MG_E_PRISM] == NULL) { |
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mg_ehand[MG_E_PRISM] = e_prism; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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greg |
1.1 |
if (mg_ehand[MG_E_TORUS] == NULL) { |
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mg_ehand[MG_E_TORUS] = e_torus; |
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ineed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX; |
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} else |
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uneed |= 1<<MG_E_POINT|1<<MG_E_NORMAL|1<<MG_E_VERTEX|1<<MG_E_XF; |
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greg |
1.4 |
if (mg_ehand[MG_E_COLOR] != NULL) { |
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if (mg_ehand[MG_E_CMIX] == NULL) |
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mg_ehand[MG_E_CMIX] = e_cmix; |
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if (mg_ehand[MG_E_CSPEC] == NULL) |
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mg_ehand[MG_E_CSPEC] = e_cspec; |
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} |
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greg |
1.1 |
/* check for consistency */ |
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if (mg_ehand[MG_E_FACE] != NULL) |
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uneed |= 1<<MG_E_POINT|1<<MG_E_VERTEX|1<<MG_E_XF; |
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if (mg_ehand[MG_E_CXY] != NULL) |
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uneed |= 1<<MG_E_COLOR; |
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if (mg_ehand[MG_E_RD] != NULL || mg_ehand[MG_E_TD] != NULL || |
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mg_ehand[MG_E_ED] != NULL || |
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mg_ehand[MG_E_RS] != NULL || |
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mg_ehand[MG_E_TS] != NULL) |
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uneed |= 1<<MG_E_MATERIAL; |
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for (i = 0; i < MG_NENTITIES; i++) |
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if (uneed & 1<<i && mg_ehand[i] == NULL) { |
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fprintf(stderr, "Missing support for \"%s\" entity\n", |
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mg_ename[i]); |
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exit(1); |
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} |
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/* add support as needed */ |
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if (ineed & 1<<MG_E_VERTEX && mg_ehand[MG_E_VERTEX] != c_hvertex) |
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e_supp[MG_E_VERTEX] = c_hvertex; |
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if (ineed & 1<<MG_E_POINT && mg_ehand[MG_E_POINT] != c_hvertex) |
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e_supp[MG_E_POINT] = c_hvertex; |
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if (ineed & 1<<MG_E_NORMAL && mg_ehand[MG_E_NORMAL] != c_hvertex) |
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e_supp[MG_E_NORMAL] = c_hvertex; |
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/* discard remaining entities */ |
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for (i = 0; i < MG_NENTITIES; i++) |
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if (mg_ehand[i] == NULL) |
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mg_ehand[i] = e_any_toss; |
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} |
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int |
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mg_entity(name) /* get entity number from its name */ |
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char *name; |
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{ |
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static LUTAB ent_tab; /* entity lookup table */ |
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register char *cp; |
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if (!ent_tab.tsiz) { /* initialize hash table */ |
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if (!lu_init(&ent_tab, MG_NENTITIES)) |
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return(-1); /* what to do? */ |
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for (cp = mg_ename[MG_NENTITIES-1]; cp >= mg_ename[0]; |
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cp -= sizeof(mg_ename[0])) |
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lu_find(&ent_tab, cp)->key = cp; |
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} |
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cp = lu_find(&ent_tab, name)->key; |
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if (cp == NULL) |
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return(-1); |
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return((cp - mg_ename[0])/sizeof(mg_ename[0])); |
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} |
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static int |
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handle_it(en, ac, av) /* pass entity to appropriate handler */ |
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register int en; |
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int ac; |
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char **av; |
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{ |
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int rv; |
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if (en < 0 && (en = mg_entity(av[0])) < 0) |
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return(MG_EUNK); |
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if (e_supp[en] != NULL) { |
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if ((rv = (*e_supp[en])(ac, av)) != MG_OK) |
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return(rv); |
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} |
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return((*mg_ehand[en])(ac, av)); |
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} |
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int |
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mg_open(ctx, fn) /* open new input file */ |
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register MG_FCTXT *ctx; |
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char *fn; |
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{ |
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int olen; |
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register char *cp; |
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ctx->lineno = 0; |
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if (fn == NULL) { |
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ctx->fname = "<stdin>"; |
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ctx->fp = stdin; |
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ctx->prev = mg_file; |
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mg_file = ctx; |
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return(MG_OK); |
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} |
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/* get name relative to this context */ |
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if (mg_file != NULL && |
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(cp = strrchr(mg_file->fname, '/')) != NULL) |
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olen = cp - mg_file->fname + 1; |
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else |
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olen = 0; |
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ctx->fname = (char *)malloc(olen+strlen(fn)+1); |
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if (ctx->fname == NULL) |
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return(MG_EMEM); |
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if (olen) |
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strcpy(ctx->fname, mg_file->fname); |
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strcpy(ctx->fname+olen, fn); |
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ctx->fp = fopen(ctx->fname, "r"); |
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if (ctx->fp == NULL) { |
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free((MEM_PTR)ctx->fname); |
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return(MG_ENOFILE); |
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} |
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ctx->prev = mg_file; /* establish new context */ |
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mg_file = ctx; |
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return(MG_OK); |
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} |
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void |
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mg_close() /* close input file */ |
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{ |
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register MG_FCTXT *ctx = mg_file; |
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mg_file = ctx->prev; /* restore enclosing context */ |
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if (ctx->fp == stdin) |
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return; /* don't close standard input */ |
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fclose(ctx->fp); |
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free((MEM_PTR)ctx->fname); |
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} |
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int |
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mg_rewind() /* rewind input file */ |
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{ |
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if (mg_file->lineno == 0) |
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return(MG_OK); |
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if (mg_file->fp == stdin) |
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return(MG_ESEEK); /* cannot seek on standard input */ |
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if (fseek(mg_file->fp, 0L, 0) == EOF) |
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return(MG_ESEEK); |
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mg_file->lineno = 0; |
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return(MG_OK); |
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} |
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int |
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mg_read() /* read next line from file */ |
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{ |
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register int len = 0; |
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do { |
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if (fgets(mg_file->inpline+len, |
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MG_MAXLINE-len, mg_file->fp) == NULL) |
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return(len); |
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mg_file->lineno++; |
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len += strlen(mg_file->inpline+len); |
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if (len > 1 && mg_file->inpline[len-2] == '\\') |
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mg_file->inpline[--len-1] = ' '; |
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} while (mg_file->inpline[len]); |
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return(len); |
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} |
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int |
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mg_parse() /* parse current input line */ |
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{ |
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char abuf[MG_MAXLINE]; |
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char *argv[MG_MAXARGC]; |
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int en; |
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register char *cp, **ap; |
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290 |
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strcpy(cp=abuf, mg_file->inpline); |
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ap = argv; /* break into words */ |
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for ( ; ; ) { |
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while (isspace(*cp)) |
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*cp++ = '\0'; |
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if (!*cp) |
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break; |
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if (ap - argv >= MG_MAXARGC-1) |
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return(MG_EARGC); |
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*ap++ = cp; |
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while (*++cp && !isspace(*cp)) |
301 |
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; |
302 |
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} |
303 |
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if (ap == argv) |
304 |
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return(MG_OK); /* no words in line */ |
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*ap = NULL; |
306 |
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/* else handle it */ |
307 |
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return(handle_it(-1, ap-argv, argv)); |
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} |
309 |
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311 |
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int |
312 |
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mg_load(fn) /* load an MGF file */ |
313 |
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char *fn; |
314 |
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{ |
315 |
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MG_FCTXT cntxt; |
316 |
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int rval; |
317 |
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318 |
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if ((rval = mg_open(&cntxt, fn)) != MG_OK) { |
319 |
greg |
1.2 |
fprintf(stderr, "%s: %s\n", fn, mg_err[rval]); |
320 |
greg |
1.1 |
return(rval); |
321 |
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} |
322 |
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while (mg_read()) /* parse each line */ |
323 |
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if ((rval = mg_parse()) != MG_OK) { |
324 |
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fprintf(stderr, "%s: %d: %s:\n%s", cntxt.fname, |
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cntxt.lineno, mg_err[rval], |
326 |
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cntxt.inpline); |
327 |
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break; |
328 |
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} |
329 |
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mg_close(); |
330 |
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return(rval); |
331 |
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} |
332 |
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333 |
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334 |
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void |
335 |
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mg_clear() /* clear parser history */ |
336 |
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{ |
337 |
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c_clearall(); /* clear context tables */ |
338 |
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mg_file = NULL; /* reset our context */ |
339 |
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} |
340 |
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341 |
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342 |
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int |
343 |
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mg_iterate(ac, av, f) /* iterate on statement */ |
344 |
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int ac; |
345 |
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register char **av; |
346 |
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int (*f)(); |
347 |
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{ |
348 |
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int niter, rval; |
349 |
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register int i, j; |
350 |
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char *argv[MG_MAXARGC]; |
351 |
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char cntbuf[10]; |
352 |
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/* build partial transformation */ |
353 |
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for (i = 0; i < ac; i++) { |
354 |
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if (av[i][0] == '-' && av[i][1] == 'a' && av[i][2] == '\0') |
355 |
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break; |
356 |
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argv[i+1] = av[i]; |
357 |
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} |
358 |
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argv[i+1] = NULL; |
359 |
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if (i) { /* handle transformation */ |
360 |
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argv[0] = mg_ename[MG_E_XF]; |
361 |
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if ((rval = handle_it(MG_E_XF, i+1, argv)) != MG_OK) |
362 |
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return(rval); |
363 |
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} |
364 |
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if (i < ac) { /* run array */ |
365 |
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if (i+1 >= ac || !isint(av[i+1])) |
366 |
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return(MG_ETYPE); |
367 |
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niter = atoi(av[i+1]); |
368 |
greg |
1.2 |
argv[0] = mg_ename[MG_E_OBJECT]; |
369 |
greg |
1.1 |
argv[1] = cntbuf; |
370 |
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for (j = 2; j+i < ac; j++) |
371 |
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argv[j] = av[j+i]; |
372 |
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argv[j] = NULL; |
373 |
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for (j = 0; j < niter; j++) { |
374 |
|
|
sprintf(cntbuf, "%d", j); |
375 |
greg |
1.2 |
if ((rval = handle_it(MG_E_OBJECT, 2, argv)) != MG_OK) |
376 |
|
|
return(rval); |
377 |
|
|
argv[0] = "-i"; |
378 |
greg |
1.1 |
if ((rval = mg_iterate(ac-i, argv, f)) != MG_OK) |
379 |
greg |
1.2 |
return(rval); |
380 |
|
|
argv[0] = mg_ename[MG_E_OBJECT]; |
381 |
|
|
if ((rval = handle_it(MG_E_OBJECT, 1, argv)) != MG_OK) |
382 |
greg |
1.1 |
return(rval); |
383 |
|
|
} |
384 |
|
|
} else if ((rval = (*f)()) != MG_OK) /* else do this instance */ |
385 |
|
|
return(rval); |
386 |
|
|
if (i) { /* reset the transform */ |
387 |
|
|
argv[0] = mg_ename[MG_E_XF]; |
388 |
|
|
argv[1] = NULL; |
389 |
|
|
(void)handle_it(MG_E_XF, 1, argv); |
390 |
|
|
} |
391 |
|
|
return(MG_OK); |
392 |
|
|
} |
393 |
|
|
|
394 |
|
|
|
395 |
|
|
/**************************************************************************** |
396 |
|
|
* The following routines handle unsupported entities |
397 |
|
|
*/ |
398 |
|
|
|
399 |
|
|
|
400 |
|
|
static int |
401 |
|
|
e_any_toss(ac, av) /* discard an unwanted entity */ |
402 |
|
|
int ac; |
403 |
|
|
char **av; |
404 |
|
|
{ |
405 |
|
|
return(MG_OK); |
406 |
|
|
} |
407 |
|
|
|
408 |
|
|
|
409 |
|
|
static int |
410 |
|
|
reload_file() /* reload current MGF file */ |
411 |
|
|
{ |
412 |
|
|
register int rval; |
413 |
|
|
|
414 |
|
|
if ((rval = mg_rewind()) != MG_OK) |
415 |
|
|
return(rval); |
416 |
|
|
while (mg_read()) |
417 |
|
|
if ((rval = mg_parse()) != MG_OK) |
418 |
|
|
return(rval); |
419 |
|
|
return(MG_OK); |
420 |
|
|
} |
421 |
|
|
|
422 |
|
|
|
423 |
|
|
static int |
424 |
|
|
e_include(ac, av) /* include file */ |
425 |
|
|
int ac; |
426 |
|
|
char **av; |
427 |
|
|
{ |
428 |
|
|
MG_FCTXT ictx; |
429 |
|
|
int rv; |
430 |
|
|
|
431 |
|
|
if (ac < 2) |
432 |
|
|
return(MG_EARGC); |
433 |
|
|
if ((rv = mg_open(&ictx, av[1])) != MG_OK) |
434 |
|
|
return(rv); |
435 |
|
|
if ((rv = mg_iterate(ac-2, av+2, reload_file)) != MG_OK) { |
436 |
|
|
fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname, |
437 |
|
|
ictx.lineno, mg_err[rv], ictx.inpline); |
438 |
|
|
mg_close(); |
439 |
|
|
return(MG_EINCL); |
440 |
|
|
} |
441 |
|
|
mg_close(); |
442 |
|
|
return(MG_OK); |
443 |
|
|
} |
444 |
|
|
|
445 |
|
|
|
446 |
|
|
static void |
447 |
|
|
make_axes(u, v, w) /* compute u and v given w (normalized) */ |
448 |
|
|
FVECT u, v, w; |
449 |
|
|
{ |
450 |
|
|
register int i; |
451 |
|
|
|
452 |
|
|
v[0] = v[1] = v[2] = 0.; |
453 |
|
|
for (i = 0; i < 3; i++) |
454 |
|
|
if (w[i] < .6 && w[i] > -.6) |
455 |
|
|
break; |
456 |
|
|
v[i] = 1.; |
457 |
|
|
fcross(u, v, w); |
458 |
|
|
normalize(u); |
459 |
|
|
fcross(v, w, u); |
460 |
|
|
} |
461 |
|
|
|
462 |
|
|
|
463 |
|
|
static int |
464 |
|
|
e_sph(ac, av) /* expand a sphere into cones */ |
465 |
|
|
int ac; |
466 |
|
|
char **av; |
467 |
|
|
{ |
468 |
|
|
static char p2x[24], p2y[24], p2z[24], r1[24], r2[24]; |
469 |
|
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_sv1","=","_sv2"}; |
470 |
|
|
static char *v2ent[4] = {mg_ename[MG_E_VERTEX],"_sv2","="}; |
471 |
|
|
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2x,p2y,p2z}; |
472 |
|
|
static char *conent[6] = {mg_ename[MG_E_CONE],"_sv1",r1,"_sv2",r2}; |
473 |
|
|
register C_VERTEX *cv; |
474 |
|
|
register int i; |
475 |
|
|
int rval; |
476 |
|
|
double rad; |
477 |
|
|
double theta; |
478 |
|
|
|
479 |
|
|
if (ac != 3) |
480 |
|
|
return(MG_EARGC); |
481 |
|
|
if ((cv = c_getvert(av[1])) == NULL) |
482 |
|
|
return(MG_EUNDEF); |
483 |
|
|
if (!isflt(av[2])) |
484 |
|
|
return(MG_ETYPE); |
485 |
|
|
rad = atof(av[2]); |
486 |
|
|
/* initialize */ |
487 |
|
|
warpconends = 1; |
488 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 3, v2ent)) != MG_OK) |
489 |
|
|
return(rval); |
490 |
|
|
sprintf(p2x, FLTFMT, cv->p[0]); |
491 |
|
|
sprintf(p2y, FLTFMT, cv->p[1]); |
492 |
|
|
sprintf(p2z, FLTFMT, cv->p[2]+rad); |
493 |
|
|
if ((rval = handle_it(MG_E_POINT, 4, p2ent)) != MG_OK) |
494 |
|
|
return(rval); |
495 |
|
|
r2[0] = '0'; r2[1] = '\0'; |
496 |
|
|
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
497 |
|
|
theta = i*(PI/2)/mg_nqcdivs; |
498 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
499 |
|
|
return(rval); |
500 |
|
|
sprintf(p2z, FLTFMT, cv->p[2]+rad*cos(theta)); |
501 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
502 |
|
|
return(rval); |
503 |
|
|
if ((rval = handle_it(MG_E_POINT, 4, p2ent)) != MG_OK) |
504 |
|
|
return(rval); |
505 |
|
|
strcpy(r1, r2); |
506 |
|
|
sprintf(r2, FLTFMT, rad*sin(theta)); |
507 |
|
|
if ((rval = handle_it(MG_E_CONE, 5, conent)) != MG_OK) |
508 |
|
|
return(rval); |
509 |
|
|
} |
510 |
|
|
warpconends = 0; |
511 |
|
|
return(MG_OK); |
512 |
|
|
} |
513 |
|
|
|
514 |
|
|
|
515 |
|
|
static int |
516 |
|
|
e_torus(ac, av) /* expand a torus into cones */ |
517 |
|
|
int ac; |
518 |
|
|
char **av; |
519 |
|
|
{ |
520 |
|
|
static char p2[3][24], r1[24], r2[24]; |
521 |
|
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_tv1","=","_tv2"}; |
522 |
|
|
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_tv2","="}; |
523 |
|
|
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2[0],p2[1],p2[2]}; |
524 |
|
|
static char *conent[6] = {mg_ename[MG_E_CONE],"_tv1",r1,"_tv2",r2}; |
525 |
|
|
register C_VERTEX *cv; |
526 |
|
|
register int i, j; |
527 |
|
|
int rval; |
528 |
|
|
int sgn; |
529 |
|
|
double minrad, maxrad, avgrad; |
530 |
|
|
double theta; |
531 |
|
|
|
532 |
|
|
if (ac != 4) |
533 |
|
|
return(MG_EARGC); |
534 |
|
|
if ((cv = c_getvert(av[1])) == NULL) |
535 |
|
|
return(MG_EUNDEF); |
536 |
greg |
1.3 |
if (is0vect(cv->n)) |
537 |
greg |
1.1 |
return(MG_EILL); |
538 |
|
|
if (!isflt(av[2]) || !isflt(av[3])) |
539 |
|
|
return(MG_ETYPE); |
540 |
|
|
minrad = atof(av[2]); |
541 |
greg |
1.3 |
round0(minrad); |
542 |
greg |
1.1 |
maxrad = atof(av[3]); |
543 |
|
|
/* check orientation */ |
544 |
|
|
if (minrad > 0.) |
545 |
|
|
sgn = 1; |
546 |
|
|
else if (minrad < 0.) |
547 |
|
|
sgn = -1; |
548 |
|
|
else if (maxrad > 0.) |
549 |
|
|
sgn = 1; |
550 |
|
|
else if (maxrad < 0.) |
551 |
|
|
sgn = -1; |
552 |
|
|
else |
553 |
|
|
return(MG_EILL); |
554 |
|
|
if (sgn*(maxrad-minrad) <= 0.) |
555 |
|
|
return(MG_EILL); |
556 |
|
|
/* initialize */ |
557 |
|
|
warpconends = 1; |
558 |
|
|
v2ent[3] = av[1]; |
559 |
|
|
for (j = 0; j < 3; j++) |
560 |
|
|
sprintf(p2[j], FLTFMT, cv->p[j] + |
561 |
|
|
.5*sgn*(maxrad-minrad)*cv->n[j]); |
562 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
563 |
|
|
return(rval); |
564 |
|
|
if ((rval = handle_it(MG_E_POINT, 4, p2ent)) != MG_OK) |
565 |
|
|
return(rval); |
566 |
|
|
sprintf(r2, FLTFMT, avgrad=.5*(minrad+maxrad)); |
567 |
|
|
/* run outer section */ |
568 |
|
|
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
569 |
|
|
theta = i*(PI/2)/mg_nqcdivs; |
570 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
571 |
|
|
return(rval); |
572 |
|
|
for (j = 0; j < 3; j++) |
573 |
|
|
sprintf(p2[j], FLTFMT, cv->p[j] + |
574 |
|
|
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
575 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
576 |
|
|
return(rval); |
577 |
|
|
if ((rval = handle_it(MG_E_POINT, 4, p2ent)) != MG_OK) |
578 |
|
|
return(rval); |
579 |
|
|
strcpy(r1, r2); |
580 |
|
|
sprintf(r2, FLTFMT, avgrad + .5*(maxrad-minrad)*sin(theta)); |
581 |
|
|
if ((rval = handle_it(MG_E_CONE, 5, conent)) != MG_OK) |
582 |
|
|
return(rval); |
583 |
|
|
} |
584 |
|
|
/* run inner section */ |
585 |
|
|
sprintf(r2, FLTFMT, -.5*(minrad+maxrad)); |
586 |
|
|
for ( ; i <= 4*mg_nqcdivs; i++) { |
587 |
|
|
theta = i*(PI/2)/mg_nqcdivs; |
588 |
|
|
for (j = 0; j < 3; j++) |
589 |
|
|
sprintf(p2[j], FLTFMT, cv->p[j] + |
590 |
|
|
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
591 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
592 |
|
|
return(rval); |
593 |
|
|
if ((rval = handle_it(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
594 |
|
|
return(rval); |
595 |
|
|
if ((rval = handle_it(MG_E_POINT, 4, p2ent)) != MG_OK) |
596 |
|
|
return(rval); |
597 |
|
|
strcpy(r1, r2); |
598 |
|
|
sprintf(r2, FLTFMT, -avgrad - .5*(maxrad-minrad)*sin(theta)); |
599 |
|
|
if ((rval = handle_it(MG_E_CONE, 5, conent)) != MG_OK) |
600 |
|
|
return(rval); |
601 |
|
|
} |
602 |
|
|
warpconends = 0; |
603 |
|
|
return(MG_OK); |
604 |
|
|
} |
605 |
|
|
|
606 |
|
|
|
607 |
|
|
static int |
608 |
|
|
e_cyl(ac, av) /* replace a cylinder with equivalent cone */ |
609 |
|
|
int ac; |
610 |
|
|
char **av; |
611 |
|
|
{ |
612 |
|
|
static char *avnew[6] = {mg_ename[MG_E_CONE]}; |
613 |
|
|
|
614 |
|
|
if (ac != 4) |
615 |
|
|
return(MG_EARGC); |
616 |
|
|
avnew[1] = av[1]; |
617 |
|
|
avnew[2] = av[2]; |
618 |
|
|
avnew[3] = av[3]; |
619 |
|
|
avnew[4] = av[2]; |
620 |
|
|
return(handle_it(MG_E_CONE, 5, avnew)); |
621 |
|
|
} |
622 |
|
|
|
623 |
|
|
|
624 |
|
|
static int |
625 |
|
|
e_ring(ac, av) /* turn a ring into polygons */ |
626 |
|
|
int ac; |
627 |
|
|
char **av; |
628 |
|
|
{ |
629 |
|
|
static char p3[3][24], p4[3][24]; |
630 |
|
|
static char *nzent[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
631 |
|
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_rv1","="}; |
632 |
|
|
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_rv2","=","_rv3"}; |
633 |
|
|
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_rv3","="}; |
634 |
|
|
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
635 |
|
|
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_rv4","="}; |
636 |
|
|
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
637 |
|
|
static char *fent[6] = {mg_ename[MG_E_FACE],"_rv1","_rv2","_rv3","_rv4"}; |
638 |
|
|
register C_VERTEX *cv; |
639 |
|
|
register int i, j; |
640 |
|
|
FVECT u, v; |
641 |
|
|
double minrad, maxrad; |
642 |
|
|
int rv; |
643 |
|
|
double theta, d; |
644 |
|
|
|
645 |
|
|
if (ac != 4) |
646 |
|
|
return(MG_EARGC); |
647 |
|
|
if ((cv = c_getvert(av[1])) == NULL) |
648 |
|
|
return(MG_EUNDEF); |
649 |
greg |
1.3 |
if (is0vect(cv->n)) |
650 |
greg |
1.1 |
return(MG_EILL); |
651 |
|
|
if (!isflt(av[2]) || !isflt(av[3])) |
652 |
|
|
return(MG_ETYPE); |
653 |
|
|
minrad = atof(av[2]); |
654 |
greg |
1.3 |
round0(minrad); |
655 |
greg |
1.1 |
maxrad = atof(av[3]); |
656 |
|
|
if (minrad < 0. || maxrad <= minrad) |
657 |
|
|
return(MG_EILL); |
658 |
|
|
/* initialize */ |
659 |
|
|
make_axes(u, v, cv->n); |
660 |
|
|
for (j = 0; j < 3; j++) |
661 |
|
|
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*u[j]); |
662 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
663 |
|
|
return(rv); |
664 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p3ent)) != MG_OK) |
665 |
|
|
return(rv); |
666 |
|
|
if (minrad == 0.) { /* closed */ |
667 |
|
|
v1ent[3] = av[1]; |
668 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
669 |
|
|
return(rv); |
670 |
|
|
if ((rv = handle_it(MG_E_NORMAL, 4, nzent)) != MG_OK) |
671 |
|
|
return(rv); |
672 |
|
|
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
673 |
|
|
theta = i*(PI/2)/mg_nqcdivs; |
674 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
675 |
|
|
return(rv); |
676 |
|
|
for (j = 0; j < 3; j++) |
677 |
|
|
sprintf(p3[j], FLTFMT, cv->p[j] + |
678 |
|
|
maxrad*u[j]*cos(theta) + |
679 |
|
|
maxrad*v[j]*sin(theta)); |
680 |
greg |
1.3 |
if ((rv = handle_it(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
681 |
greg |
1.1 |
return(rv); |
682 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p3ent)) != MG_OK) |
683 |
|
|
return(rv); |
684 |
|
|
if ((rv = handle_it(MG_E_FACE, 4, fent)) != MG_OK) |
685 |
|
|
return(rv); |
686 |
|
|
} |
687 |
|
|
} else { /* open */ |
688 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
689 |
|
|
return(rv); |
690 |
|
|
for (j = 0; j < 3; j++) |
691 |
|
|
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*u[j]); |
692 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p4ent)) != MG_OK) |
693 |
|
|
return(rv); |
694 |
|
|
v1ent[3] = "_rv4"; |
695 |
|
|
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
696 |
|
|
theta = i*(PI/2)/mg_nqcdivs; |
697 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
698 |
|
|
return(rv); |
699 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
700 |
|
|
return(rv); |
701 |
|
|
for (j = 0; j < 3; j++) { |
702 |
|
|
d = u[j]*cos(theta) + v[j]*sin(theta); |
703 |
|
|
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*d); |
704 |
|
|
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*d); |
705 |
|
|
} |
706 |
greg |
1.3 |
if ((rv = handle_it(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
707 |
greg |
1.1 |
return(rv); |
708 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p3ent)) != MG_OK) |
709 |
|
|
return(rv); |
710 |
greg |
1.3 |
if ((rv = handle_it(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
711 |
greg |
1.1 |
return(rv); |
712 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p4ent)) != MG_OK) |
713 |
|
|
return(rv); |
714 |
|
|
if ((rv = handle_it(MG_E_FACE, 5, fent)) != MG_OK) |
715 |
|
|
return(rv); |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
return(MG_OK); |
719 |
|
|
} |
720 |
|
|
|
721 |
|
|
|
722 |
|
|
static int |
723 |
|
|
e_cone(ac, av) /* turn a cone into polygons */ |
724 |
|
|
int ac; |
725 |
|
|
char **av; |
726 |
|
|
{ |
727 |
|
|
static char p3[3][24], p4[3][24], n3[3][24], n4[3][24]; |
728 |
|
|
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_cv1","="}; |
729 |
|
|
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_cv2","=","_cv3"}; |
730 |
|
|
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_cv3","="}; |
731 |
|
|
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
732 |
|
|
static char *n3ent[5] = {mg_ename[MG_E_NORMAL],n3[0],n3[1],n3[2]}; |
733 |
|
|
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_cv4","="}; |
734 |
|
|
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
735 |
|
|
static char *n4ent[5] = {mg_ename[MG_E_NORMAL],n4[0],n4[1],n4[2]}; |
736 |
|
|
static char *fent[6] = {mg_ename[MG_E_FACE],"_cv1","_cv2","_cv3","_cv4"}; |
737 |
|
|
register C_VERTEX *cv1, *cv2; |
738 |
|
|
register int i, j; |
739 |
|
|
FVECT u, v, w; |
740 |
|
|
double rad1, rad2; |
741 |
|
|
int sgn; |
742 |
|
|
double n1off, n2off; |
743 |
|
|
double d; |
744 |
|
|
int rv; |
745 |
|
|
double theta; |
746 |
|
|
|
747 |
|
|
if (ac != 5) |
748 |
|
|
return(MG_EARGC); |
749 |
|
|
if ((cv1 = c_getvert(av[1])) == NULL || |
750 |
|
|
(cv2 = c_getvert(av[3])) == NULL) |
751 |
|
|
return(MG_EUNDEF); |
752 |
|
|
if (!isflt(av[2]) || !isflt(av[4])) |
753 |
|
|
return(MG_ETYPE); |
754 |
|
|
rad1 = atof(av[2]); |
755 |
greg |
1.3 |
round0(rad1); |
756 |
greg |
1.1 |
rad2 = atof(av[4]); |
757 |
greg |
1.3 |
round0(rad2); |
758 |
greg |
1.1 |
if (rad1 == 0.) { |
759 |
|
|
if (rad2 == 0.) |
760 |
|
|
return(MG_EILL); |
761 |
|
|
} else if (rad2 != 0.) { |
762 |
|
|
if (rad1 < 0. ^ rad2 < 0.) |
763 |
|
|
return(MG_EILL); |
764 |
|
|
} else { /* swap */ |
765 |
|
|
C_VERTEX *cv; |
766 |
|
|
|
767 |
|
|
cv = cv1; |
768 |
|
|
cv1 = cv2; |
769 |
|
|
cv2 = cv; |
770 |
|
|
d = rad1; |
771 |
|
|
rad1 = rad2; |
772 |
|
|
rad2 = d; |
773 |
|
|
} |
774 |
|
|
sgn = rad2 < 0. ? -1 : 1; |
775 |
|
|
/* initialize */ |
776 |
|
|
for (j = 0; j < 3; j++) |
777 |
|
|
w[j] = cv1->p[j] - cv2->p[j]; |
778 |
|
|
if ((d = normalize(w)) == 0.) |
779 |
|
|
return(MG_EILL); |
780 |
|
|
n1off = n2off = (rad2 - rad1)/d; |
781 |
greg |
1.3 |
if (warpconends) { /* hack for e_sph and e_torus */ |
782 |
|
|
d = atan(n2off) - (PI/4)/mg_nqcdivs; |
783 |
|
|
if (d <= -PI/2+FTINY) |
784 |
|
|
n2off = -FHUGE; |
785 |
|
|
else |
786 |
|
|
n2off = tan(d); |
787 |
|
|
} |
788 |
greg |
1.1 |
make_axes(u, v, w); |
789 |
|
|
for (j = 0; j < 3; j++) { |
790 |
|
|
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*u[j]); |
791 |
greg |
1.3 |
if (n2off <= -FHUGE) |
792 |
|
|
sprintf(n3[j], FLTFMT, -w[j]); |
793 |
|
|
else |
794 |
|
|
sprintf(n3[j], FLTFMT, u[j] + w[j]*n2off); |
795 |
greg |
1.1 |
} |
796 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
797 |
|
|
return(rv); |
798 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p3ent)) != MG_OK) |
799 |
|
|
return(rv); |
800 |
|
|
if ((rv = handle_it(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
801 |
|
|
return(rv); |
802 |
|
|
if (rad1 == 0.) { /* triangles */ |
803 |
|
|
v1ent[3] = av[1]; |
804 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
805 |
|
|
return(rv); |
806 |
|
|
for (j = 0; j < 3; j++) |
807 |
|
|
sprintf(n4[j], FLTFMT, w[j]); |
808 |
|
|
if ((rv = handle_it(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
809 |
|
|
return(rv); |
810 |
|
|
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
811 |
|
|
theta = sgn*i*(PI/2)/mg_nqcdivs; |
812 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
813 |
|
|
return(rv); |
814 |
|
|
for (j = 0; j < 3; j++) { |
815 |
|
|
d = u[j]*cos(theta) + v[j]*sin(theta); |
816 |
|
|
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
817 |
greg |
1.3 |
if (n2off > -FHUGE) |
818 |
|
|
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
819 |
greg |
1.1 |
} |
820 |
greg |
1.3 |
if ((rv = handle_it(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
821 |
greg |
1.1 |
return(rv); |
822 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p3ent)) != MG_OK) |
823 |
|
|
return(rv); |
824 |
greg |
1.3 |
if (n2off > -FHUGE && |
825 |
|
|
(rv = handle_it(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
826 |
greg |
1.1 |
return(rv); |
827 |
|
|
if ((rv = handle_it(MG_E_FACE, 4, fent)) != MG_OK) |
828 |
|
|
return(rv); |
829 |
|
|
} |
830 |
|
|
} else { /* quads */ |
831 |
|
|
v1ent[3] = "_cv4"; |
832 |
greg |
1.3 |
if (warpconends) { /* hack for e_sph and e_torus */ |
833 |
|
|
d = atan(n1off) + (PI/4)/mg_nqcdivs; |
834 |
|
|
if (d >= PI/2-FTINY) |
835 |
|
|
n1off = FHUGE; |
836 |
|
|
else |
837 |
|
|
n1off = tan(atan(n1off)+(PI/4)/mg_nqcdivs); |
838 |
|
|
} |
839 |
greg |
1.1 |
for (j = 0; j < 3; j++) { |
840 |
|
|
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*u[j]); |
841 |
greg |
1.3 |
if (n1off >= FHUGE) |
842 |
|
|
sprintf(n4[j], FLTFMT, w[j]); |
843 |
|
|
else |
844 |
|
|
sprintf(n4[j], FLTFMT, u[j] + w[j]*n1off); |
845 |
greg |
1.1 |
} |
846 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
847 |
|
|
return(rv); |
848 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p4ent)) != MG_OK) |
849 |
|
|
return(rv); |
850 |
|
|
if ((rv = handle_it(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
851 |
|
|
return(rv); |
852 |
|
|
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
853 |
|
|
theta = sgn*i*(PI/2)/mg_nqcdivs; |
854 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
855 |
|
|
return(rv); |
856 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
857 |
|
|
return(rv); |
858 |
|
|
for (j = 0; j < 3; j++) { |
859 |
|
|
d = u[j]*cos(theta) + v[j]*sin(theta); |
860 |
|
|
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
861 |
greg |
1.3 |
if (n2off > -FHUGE) |
862 |
|
|
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
863 |
greg |
1.1 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*d); |
864 |
greg |
1.3 |
if (n1off < FHUGE) |
865 |
|
|
sprintf(n4[j], FLTFMT, d + w[j]*n1off); |
866 |
greg |
1.1 |
} |
867 |
greg |
1.3 |
if ((rv = handle_it(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
868 |
greg |
1.1 |
return(rv); |
869 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p3ent)) != MG_OK) |
870 |
|
|
return(rv); |
871 |
greg |
1.3 |
if (n2off > -FHUGE && |
872 |
|
|
(rv = handle_it(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
873 |
greg |
1.1 |
return(rv); |
874 |
greg |
1.3 |
if ((rv = handle_it(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
875 |
greg |
1.1 |
return(rv); |
876 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, p4ent)) != MG_OK) |
877 |
|
|
return(rv); |
878 |
greg |
1.3 |
if (n1off < FHUGE && |
879 |
|
|
(rv = handle_it(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
880 |
greg |
1.1 |
return(rv); |
881 |
|
|
if ((rv = handle_it(MG_E_FACE, 5, fent)) != MG_OK) |
882 |
|
|
return(rv); |
883 |
|
|
} |
884 |
greg |
1.4 |
} |
885 |
|
|
return(MG_OK); |
886 |
|
|
} |
887 |
|
|
|
888 |
|
|
|
889 |
|
|
static int |
890 |
|
|
e_prism(ac, av) /* turn a prism into polygons */ |
891 |
|
|
int ac; |
892 |
|
|
char **av; |
893 |
|
|
{ |
894 |
|
|
static char p[3][24]; |
895 |
|
|
static char *vent[4] = {mg_ename[MG_E_VERTEX],NULL,"="}; |
896 |
|
|
static char *pent[5] = {mg_ename[MG_E_POINT],p[0],p[1],p[2]}; |
897 |
|
|
char *newav[MG_MAXARGC], nvn[MG_MAXARGC-1][8]; |
898 |
|
|
double length; |
899 |
|
|
FVECT v1, v2, v3, norm; |
900 |
|
|
register C_VERTEX *cv; |
901 |
|
|
C_VERTEX *cv0; |
902 |
|
|
int rv; |
903 |
|
|
register int i, j; |
904 |
|
|
|
905 |
|
|
if (ac < 5) |
906 |
|
|
return(MG_EARGC); |
907 |
|
|
if (!isflt(av[1])) |
908 |
|
|
return(MG_ETYPE); |
909 |
|
|
length = atof(av[1]); |
910 |
|
|
if (length <= FTINY && length >= -FTINY) |
911 |
|
|
return(MG_EILL); |
912 |
|
|
/* do bottom face */ |
913 |
|
|
newav[0] = mg_ename[MG_E_FACE]; |
914 |
|
|
for (i = 1; i < ac-1; i++) |
915 |
|
|
newav[i] = av[i+1]; |
916 |
|
|
newav[i] = NULL; |
917 |
|
|
if ((rv = handle_it(MG_E_FACE, i, newav)) != MG_OK) |
918 |
|
|
return(rv); |
919 |
|
|
/* compute face normal */ |
920 |
|
|
if ((cv0 = c_getvert(av[2])) == NULL) |
921 |
|
|
return(MG_EUNDEF); |
922 |
|
|
norm[0] = norm[1] = norm[2] = 0.; |
923 |
|
|
v1[0] = v1[1] = v1[2] = 0.; |
924 |
|
|
for (i = 2; i < ac-1; i++) { |
925 |
|
|
if ((cv = c_getvert(av[i+1])) == NULL) |
926 |
|
|
return(MG_EUNDEF); |
927 |
|
|
v2[0] = cv->p[0] - cv0->p[0]; |
928 |
|
|
v2[1] = cv->p[1] - cv0->p[1]; |
929 |
|
|
v2[2] = cv->p[2] - cv0->p[2]; |
930 |
|
|
fcross(v3, v1, v2); |
931 |
|
|
norm[0] += v3[0]; |
932 |
|
|
norm[1] += v3[1]; |
933 |
|
|
norm[2] += v3[2]; |
934 |
|
|
VCOPY(v1, v2); |
935 |
|
|
} |
936 |
|
|
if (normalize(norm) == 0.) |
937 |
|
|
return(MG_EILL); |
938 |
|
|
/* create moved vertices */ |
939 |
|
|
for (i = 1; i < ac-1; i++) { |
940 |
|
|
sprintf(nvn[i-1], "_pv%d", i); |
941 |
|
|
vent[1] = nvn[i-1]; |
942 |
|
|
if ((rv = handle_it(MG_E_VERTEX, 3, vent)) != MG_OK) |
943 |
|
|
return(rv); |
944 |
|
|
cv = c_getvert(av[i+1]); /* checked above */ |
945 |
|
|
for (j = 0; j < 3; j++) |
946 |
|
|
sprintf(p[j], FLTFMT, cv->p[j] - length*norm[j]); |
947 |
|
|
if ((rv = handle_it(MG_E_POINT, 4, pent)) != MG_OK) |
948 |
|
|
return(rv); |
949 |
|
|
newav[ac-1-i] = nvn[i-1]; /* reverse */ |
950 |
|
|
} |
951 |
|
|
/* do top face */ |
952 |
|
|
if ((rv = handle_it(MG_E_FACE, ac-1, newav)) != MG_OK) |
953 |
|
|
return(rv); |
954 |
|
|
/* do the side faces */ |
955 |
|
|
newav[5] = NULL; |
956 |
|
|
newav[3] = av[ac-1]; |
957 |
|
|
newav[4] = nvn[ac-3]; |
958 |
|
|
for (i = 1; i < ac-1; i++) { |
959 |
|
|
newav[1] = nvn[i-1]; |
960 |
|
|
newav[2] = av[i+1]; |
961 |
|
|
if ((rv = handle_it(MG_E_FACE, 5, newav)) != MG_OK) |
962 |
|
|
return(rv); |
963 |
|
|
newav[3] = newav[2]; |
964 |
|
|
newav[4] = newav[1]; |
965 |
greg |
1.1 |
} |
966 |
|
|
return(MG_OK); |
967 |
|
|
} |