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/* Copyright (c) 1995 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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/* Handler routine for unknown entities */
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int (*mg_uhand)() = mg_defuhand;
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unsigned mg_nunknown; /* count of unknown entities */
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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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/* alternate handler routines */
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static int e_any_toss(), /* discard unneeded entity */
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e_ies(), /* IES luminaire file */
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e_include(), /* include file */
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e_sph(), /* sphere */
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e_cct(), /* color temperature */
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e_cmix(), /* color mixtures */
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e_cspec(), /* color spectra */
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e_cyl(), /* cylinder */
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e_cone(), /* cone */
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e_prism(), /* prism */
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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 |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX;
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} else
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<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 |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX;
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} else
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<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 |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX;
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} else
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<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 |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX;
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} else
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX|1L<<MG_E_XF;
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if (mg_ehand[MG_E_PRISM] == NULL) {
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mg_ehand[MG_E_PRISM] = e_prism;
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ineed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX;
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} else
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF;
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if (mg_ehand[MG_E_TORUS] == NULL) {
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mg_ehand[MG_E_TORUS] = e_torus;
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ineed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX;
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} else
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX|1L<<MG_E_XF;
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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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ineed |= 1L<<MG_E_COLOR|1L<<MG_E_CXY|1L<<MG_E_CSPEC|1L<<MG_E_CMIX|1L<<MG_E_CCT;
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}
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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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ineed |= 1L<<MG_E_COLOR|1L<<MG_E_CXY|1L<<MG_E_CSPEC|1L<<MG_E_CMIX|1L<<MG_E_CCT;
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}
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if (mg_ehand[MG_E_CCT] == NULL) {
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mg_ehand[MG_E_CCT] = e_cct;
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ineed |= 1L<<MG_E_COLOR|1L<<MG_E_CXY|1L<<MG_E_CSPEC|1L<<MG_E_CMIX|1L<<MG_E_CCT;
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}
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}
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/* check for consistency */
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if (mg_ehand[MG_E_FACE] != NULL)
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uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF;
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if (mg_ehand[MG_E_CXY] != NULL || mg_ehand[MG_E_CSPEC] != NULL ||
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mg_ehand[MG_E_CMIX] != NULL)
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uneed |= 1L<<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_IR] != 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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mg_ehand[MG_E_SIDES] != NULL)
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uneed |= 1L<<MG_E_MATERIAL;
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for (i = 0; i < MG_NENTITIES; i++)
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if (uneed & 1L<<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 & 1L<<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 & 1L<<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 & 1L<<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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if (ineed & 1L<<MG_E_COLOR && mg_ehand[MG_E_COLOR] != c_hcolor)
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e_supp[MG_E_COLOR] = c_hcolor;
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if (ineed & 1L<<MG_E_CXY && mg_ehand[MG_E_CXY] != c_hcolor)
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e_supp[MG_E_CXY] = c_hcolor;
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if (ineed & 1L<<MG_E_CSPEC && mg_ehand[MG_E_CSPEC] != c_hcolor)
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e_supp[MG_E_CSPEC] = c_hcolor;
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if (ineed & 1L<<MG_E_CMIX && mg_ehand[MG_E_CMIX] != c_hcolor)
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e_supp[MG_E_CMIX] = c_hcolor;
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if (ineed & 1L<<MG_E_CCT && mg_ehand[MG_E_CCT] != c_hcolor)
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e_supp[MG_E_CCT] = c_hcolor;
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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 = LU_SINIT(NULL,NULL); /* 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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int
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mg_handle(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) { /* unknown entity */
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if (mg_uhand != NULL)
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return((*mg_uhand)(ac, av));
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return(MG_EUNK);
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}
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if (e_supp[en] != NULL) { /* support handler */
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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)); /* assigned handler */
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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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static int nfids;
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register char *cp;
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ctx->fid = ++nfids;
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ctx->lineno = 0;
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if (fn == NULL) {
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strcpy(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 && (cp = strrchr(mg_file->fname, '/')) != NULL) {
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strcpy(ctx->fname, mg_file->fname);
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strcpy(ctx->fname+(cp-mg_file->fname+1), fn);
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} else
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strcpy(ctx->fname, fn);
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ctx->fp = fopen(ctx->fname, "r");
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if (ctx->fp == NULL)
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return(MG_ENOFILE);
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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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}
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void
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mg_fgetpos(pos) /* get current position in input file */
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register MG_FPOS *pos;
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{
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extern long ftell();
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pos->fid = mg_file->fid;
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pos->lineno = mg_file->lineno;
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pos->offset = ftell(mg_file->fp);
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}
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int
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mg_fgoto(pos) /* reposition input file pointer */
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register MG_FPOS *pos;
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{
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if (pos->fid != mg_file->fid)
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return(MG_ESEEK);
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if (pos->lineno == mg_file->lineno)
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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, pos->offset, 0) == EOF)
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return(MG_ESEEK);
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mg_file->lineno = pos->lineno;
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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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| 314 |
}
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int
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mg_parse() /* parse current input line */
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{
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| 320 |
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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strcpy(cp=abuf, mg_file->inpline);
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ap = argv; /* break into words */
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for ( ; ; ) {
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| 328 |
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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| 335 |
while (*++cp && !isspace(*cp))
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| 336 |
;
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| 337 |
}
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| 338 |
if (ap == argv)
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| 339 |
return(MG_OK); /* no words in line */
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| 340 |
*ap = NULL;
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| 341 |
/* else handle it */
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| 342 |
return(mg_handle(-1, ap-argv, argv));
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| 343 |
}
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| 344 |
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int
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mg_load(fn) /* load an MGF file */
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| 348 |
char *fn;
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| 349 |
{
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| 350 |
MG_FCTXT cntxt;
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| 351 |
int rval;
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| 352 |
register int nbr;
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| 354 |
if ((rval = mg_open(&cntxt, fn)) != MG_OK) {
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| 355 |
fprintf(stderr, "%s: %s\n", fn, mg_err[rval]);
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| 356 |
return(rval);
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| 357 |
}
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| 358 |
while ((nbr = mg_read()) > 0) { /* parse each line */
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| 359 |
if (nbr >= MG_MAXLINE-1 && cntxt.inpline[nbr-1] != '\n') {
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| 360 |
fprintf(stderr, "%s: %d: %s\n", cntxt.fname,
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cntxt.lineno, mg_err[rval=MG_ELINE]);
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| 362 |
break;
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| 363 |
}
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| 364 |
if ((rval = mg_parse()) != MG_OK) {
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| 365 |
fprintf(stderr, "%s: %d: %s:\n%s", cntxt.fname,
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| 366 |
cntxt.lineno, mg_err[rval],
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cntxt.inpline);
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| 368 |
break;
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| 369 |
}
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| 370 |
}
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| 371 |
mg_close();
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| 372 |
return(rval);
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| 373 |
}
|
| 374 |
|
| 375 |
|
| 376 |
int
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| 377 |
mg_defuhand(ac, av) /* default handler for unknown entities */
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| 378 |
int ac;
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| 379 |
char **av;
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| 380 |
{
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| 381 |
if (mg_nunknown++ == 0) /* report first incident */
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| 382 |
fprintf(stderr, "%s: %d: %s: %s\n", mg_file->fname,
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| 383 |
mg_file->lineno, mg_err[MG_EUNK], av[0]);
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| 384 |
return(MG_OK);
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| 385 |
}
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| 386 |
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| 387 |
|
| 388 |
void
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| 389 |
mg_clear() /* clear parser history */
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| 390 |
{
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| 391 |
c_clearall(); /* clear context tables */
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| 392 |
mg_file = NULL; /* reset our context */
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| 393 |
}
|
| 394 |
|
| 395 |
|
| 396 |
/****************************************************************************
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| 397 |
* The following routines handle unsupported entities
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| 398 |
*/
|
| 399 |
|
| 400 |
|
| 401 |
static int
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| 402 |
e_any_toss(ac, av) /* discard an unwanted entity */
|
| 403 |
int ac;
|
| 404 |
char **av;
|
| 405 |
{
|
| 406 |
return(MG_OK);
|
| 407 |
}
|
| 408 |
|
| 409 |
|
| 410 |
static int
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| 411 |
e_include(ac, av) /* include file */
|
| 412 |
int ac;
|
| 413 |
char **av;
|
| 414 |
{
|
| 415 |
char *xfarg[MG_MAXARGC];
|
| 416 |
MG_FCTXT ictx;
|
| 417 |
XF_SPEC *xf_orig = xf_context;
|
| 418 |
register int rv;
|
| 419 |
|
| 420 |
if (ac < 2)
|
| 421 |
return(MG_EARGC);
|
| 422 |
if ((rv = mg_open(&ictx, av[1])) != MG_OK)
|
| 423 |
return(rv);
|
| 424 |
if (ac > 2) {
|
| 425 |
register int i;
|
| 426 |
|
| 427 |
xfarg[0] = mg_ename[MG_E_XF];
|
| 428 |
for (i = 1; i < ac-1; i++)
|
| 429 |
xfarg[i] = av[i+1];
|
| 430 |
xfarg[ac-1] = NULL;
|
| 431 |
if ((rv = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) {
|
| 432 |
mg_close();
|
| 433 |
return(rv);
|
| 434 |
}
|
| 435 |
}
|
| 436 |
do {
|
| 437 |
while ((rv = mg_read()) > 0) {
|
| 438 |
if (rv >= MG_MAXLINE-1 && ictx.inpline[rv-1] != '\n') {
|
| 439 |
fprintf(stderr, "%s: %d: %s\n", ictx.fname,
|
| 440 |
ictx.lineno, mg_err[MG_ELINE]);
|
| 441 |
mg_close();
|
| 442 |
return(MG_EINCL);
|
| 443 |
}
|
| 444 |
if ((rv = mg_parse()) != MG_OK) {
|
| 445 |
fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname,
|
| 446 |
ictx.lineno, mg_err[rv],
|
| 447 |
ictx.inpline);
|
| 448 |
mg_close();
|
| 449 |
return(MG_EINCL);
|
| 450 |
}
|
| 451 |
}
|
| 452 |
if (ac > 2)
|
| 453 |
if ((rv = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) {
|
| 454 |
mg_close();
|
| 455 |
return(rv);
|
| 456 |
}
|
| 457 |
} while (xf_context != xf_orig);
|
| 458 |
mg_close();
|
| 459 |
return(MG_OK);
|
| 460 |
}
|
| 461 |
|
| 462 |
|
| 463 |
static void
|
| 464 |
make_axes(u, v, w) /* compute u and v given w (normalized) */
|
| 465 |
FVECT u, v, w;
|
| 466 |
{
|
| 467 |
register int i;
|
| 468 |
|
| 469 |
v[0] = v[1] = v[2] = 0.;
|
| 470 |
for (i = 0; i < 3; i++)
|
| 471 |
if (w[i] < .6 && w[i] > -.6)
|
| 472 |
break;
|
| 473 |
v[i] = 1.;
|
| 474 |
fcross(u, v, w);
|
| 475 |
normalize(u);
|
| 476 |
fcross(v, w, u);
|
| 477 |
}
|
| 478 |
|
| 479 |
|
| 480 |
static int
|
| 481 |
e_sph(ac, av) /* expand a sphere into cones */
|
| 482 |
int ac;
|
| 483 |
char **av;
|
| 484 |
{
|
| 485 |
static char p2x[24], p2y[24], p2z[24], r1[24], r2[24];
|
| 486 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_sv1","=","_sv2"};
|
| 487 |
static char *v2ent[4] = {mg_ename[MG_E_VERTEX],"_sv2","="};
|
| 488 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2x,p2y,p2z};
|
| 489 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_sv1",r1,"_sv2",r2};
|
| 490 |
register C_VERTEX *cv;
|
| 491 |
register int i;
|
| 492 |
int rval;
|
| 493 |
double rad;
|
| 494 |
double theta;
|
| 495 |
|
| 496 |
if (ac != 3)
|
| 497 |
return(MG_EARGC);
|
| 498 |
if ((cv = c_getvert(av[1])) == NULL)
|
| 499 |
return(MG_EUNDEF);
|
| 500 |
if (!isflt(av[2]))
|
| 501 |
return(MG_ETYPE);
|
| 502 |
rad = atof(av[2]);
|
| 503 |
/* initialize */
|
| 504 |
warpconends = 1;
|
| 505 |
if ((rval = mg_handle(MG_E_VERTEX, 3, v2ent)) != MG_OK)
|
| 506 |
return(rval);
|
| 507 |
sprintf(p2x, FLTFMT, cv->p[0]);
|
| 508 |
sprintf(p2y, FLTFMT, cv->p[1]);
|
| 509 |
sprintf(p2z, FLTFMT, cv->p[2]+rad);
|
| 510 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK)
|
| 511 |
return(rval);
|
| 512 |
r2[0] = '0'; r2[1] = '\0';
|
| 513 |
for (i = 1; i <= 2*mg_nqcdivs; i++) {
|
| 514 |
theta = i*(PI/2)/mg_nqcdivs;
|
| 515 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 516 |
return(rval);
|
| 517 |
sprintf(p2z, FLTFMT, cv->p[2]+rad*cos(theta));
|
| 518 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK)
|
| 519 |
return(rval);
|
| 520 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK)
|
| 521 |
return(rval);
|
| 522 |
strcpy(r1, r2);
|
| 523 |
sprintf(r2, FLTFMT, rad*sin(theta));
|
| 524 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK)
|
| 525 |
return(rval);
|
| 526 |
}
|
| 527 |
warpconends = 0;
|
| 528 |
return(MG_OK);
|
| 529 |
}
|
| 530 |
|
| 531 |
|
| 532 |
static int
|
| 533 |
e_torus(ac, av) /* expand a torus into cones */
|
| 534 |
int ac;
|
| 535 |
char **av;
|
| 536 |
{
|
| 537 |
static char p2[3][24], r1[24], r2[24];
|
| 538 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_tv1","=","_tv2"};
|
| 539 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_tv2","="};
|
| 540 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2[0],p2[1],p2[2]};
|
| 541 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_tv1",r1,"_tv2",r2};
|
| 542 |
register C_VERTEX *cv;
|
| 543 |
register int i, j;
|
| 544 |
int rval;
|
| 545 |
int sgn;
|
| 546 |
double minrad, maxrad, avgrad;
|
| 547 |
double theta;
|
| 548 |
|
| 549 |
if (ac != 4)
|
| 550 |
return(MG_EARGC);
|
| 551 |
if ((cv = c_getvert(av[1])) == NULL)
|
| 552 |
return(MG_EUNDEF);
|
| 553 |
if (is0vect(cv->n))
|
| 554 |
return(MG_EILL);
|
| 555 |
if (!isflt(av[2]) || !isflt(av[3]))
|
| 556 |
return(MG_ETYPE);
|
| 557 |
minrad = atof(av[2]);
|
| 558 |
round0(minrad);
|
| 559 |
maxrad = atof(av[3]);
|
| 560 |
/* check orientation */
|
| 561 |
if (minrad > 0.)
|
| 562 |
sgn = 1;
|
| 563 |
else if (minrad < 0.)
|
| 564 |
sgn = -1;
|
| 565 |
else if (maxrad > 0.)
|
| 566 |
sgn = 1;
|
| 567 |
else if (maxrad < 0.)
|
| 568 |
sgn = -1;
|
| 569 |
else
|
| 570 |
return(MG_EILL);
|
| 571 |
if (sgn*(maxrad-minrad) <= 0.)
|
| 572 |
return(MG_EILL);
|
| 573 |
/* initialize */
|
| 574 |
warpconends = 1;
|
| 575 |
v2ent[3] = av[1];
|
| 576 |
for (j = 0; j < 3; j++)
|
| 577 |
sprintf(p2[j], FLTFMT, cv->p[j] +
|
| 578 |
.5*sgn*(maxrad-minrad)*cv->n[j]);
|
| 579 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK)
|
| 580 |
return(rval);
|
| 581 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK)
|
| 582 |
return(rval);
|
| 583 |
sprintf(r2, FLTFMT, avgrad=.5*(minrad+maxrad));
|
| 584 |
/* run outer section */
|
| 585 |
for (i = 1; i <= 2*mg_nqcdivs; i++) {
|
| 586 |
theta = i*(PI/2)/mg_nqcdivs;
|
| 587 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 588 |
return(rval);
|
| 589 |
for (j = 0; j < 3; j++)
|
| 590 |
sprintf(p2[j], FLTFMT, cv->p[j] +
|
| 591 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]);
|
| 592 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK)
|
| 593 |
return(rval);
|
| 594 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK)
|
| 595 |
return(rval);
|
| 596 |
strcpy(r1, r2);
|
| 597 |
sprintf(r2, FLTFMT, avgrad + .5*(maxrad-minrad)*sin(theta));
|
| 598 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK)
|
| 599 |
return(rval);
|
| 600 |
}
|
| 601 |
/* run inner section */
|
| 602 |
sprintf(r2, FLTFMT, -.5*(minrad+maxrad));
|
| 603 |
for ( ; i <= 4*mg_nqcdivs; i++) {
|
| 604 |
theta = i*(PI/2)/mg_nqcdivs;
|
| 605 |
for (j = 0; j < 3; j++)
|
| 606 |
sprintf(p2[j], FLTFMT, cv->p[j] +
|
| 607 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]);
|
| 608 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 609 |
return(rval);
|
| 610 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK)
|
| 611 |
return(rval);
|
| 612 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK)
|
| 613 |
return(rval);
|
| 614 |
strcpy(r1, r2);
|
| 615 |
sprintf(r2, FLTFMT, -avgrad - .5*(maxrad-minrad)*sin(theta));
|
| 616 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK)
|
| 617 |
return(rval);
|
| 618 |
}
|
| 619 |
warpconends = 0;
|
| 620 |
return(MG_OK);
|
| 621 |
}
|
| 622 |
|
| 623 |
|
| 624 |
static int
|
| 625 |
e_cyl(ac, av) /* replace a cylinder with equivalent cone */
|
| 626 |
int ac;
|
| 627 |
char **av;
|
| 628 |
{
|
| 629 |
static char *avnew[6] = {mg_ename[MG_E_CONE]};
|
| 630 |
|
| 631 |
if (ac != 4)
|
| 632 |
return(MG_EARGC);
|
| 633 |
avnew[1] = av[1];
|
| 634 |
avnew[2] = av[2];
|
| 635 |
avnew[3] = av[3];
|
| 636 |
avnew[4] = av[2];
|
| 637 |
return(mg_handle(MG_E_CONE, 5, avnew));
|
| 638 |
}
|
| 639 |
|
| 640 |
|
| 641 |
static int
|
| 642 |
e_ring(ac, av) /* turn a ring into polygons */
|
| 643 |
int ac;
|
| 644 |
char **av;
|
| 645 |
{
|
| 646 |
static char p3[3][24], p4[3][24];
|
| 647 |
static char *nzent[5] = {mg_ename[MG_E_NORMAL],"0","0","0"};
|
| 648 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_rv1","="};
|
| 649 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_rv2","=","_rv3"};
|
| 650 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_rv3","="};
|
| 651 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]};
|
| 652 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_rv4","="};
|
| 653 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]};
|
| 654 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_rv1","_rv2","_rv3","_rv4"};
|
| 655 |
register C_VERTEX *cv;
|
| 656 |
register int i, j;
|
| 657 |
FVECT u, v;
|
| 658 |
double minrad, maxrad;
|
| 659 |
int rv;
|
| 660 |
double theta, d;
|
| 661 |
|
| 662 |
if (ac != 4)
|
| 663 |
return(MG_EARGC);
|
| 664 |
if ((cv = c_getvert(av[1])) == NULL)
|
| 665 |
return(MG_EUNDEF);
|
| 666 |
if (is0vect(cv->n))
|
| 667 |
return(MG_EILL);
|
| 668 |
if (!isflt(av[2]) || !isflt(av[3]))
|
| 669 |
return(MG_ETYPE);
|
| 670 |
minrad = atof(av[2]);
|
| 671 |
round0(minrad);
|
| 672 |
maxrad = atof(av[3]);
|
| 673 |
if (minrad < 0. || maxrad <= minrad)
|
| 674 |
return(MG_EILL);
|
| 675 |
/* initialize */
|
| 676 |
make_axes(u, v, cv->n);
|
| 677 |
for (j = 0; j < 3; j++)
|
| 678 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*u[j]);
|
| 679 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK)
|
| 680 |
return(rv);
|
| 681 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK)
|
| 682 |
return(rv);
|
| 683 |
if (minrad == 0.) { /* closed */
|
| 684 |
v1ent[3] = av[1];
|
| 685 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 686 |
return(rv);
|
| 687 |
if ((rv = mg_handle(MG_E_NORMAL, 4, nzent)) != MG_OK)
|
| 688 |
return(rv);
|
| 689 |
for (i = 1; i <= 4*mg_nqcdivs; i++) {
|
| 690 |
theta = i*(PI/2)/mg_nqcdivs;
|
| 691 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK)
|
| 692 |
return(rv);
|
| 693 |
for (j = 0; j < 3; j++)
|
| 694 |
sprintf(p3[j], FLTFMT, cv->p[j] +
|
| 695 |
maxrad*u[j]*cos(theta) +
|
| 696 |
maxrad*v[j]*sin(theta));
|
| 697 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK)
|
| 698 |
return(rv);
|
| 699 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK)
|
| 700 |
return(rv);
|
| 701 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK)
|
| 702 |
return(rv);
|
| 703 |
}
|
| 704 |
} else { /* open */
|
| 705 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK)
|
| 706 |
return(rv);
|
| 707 |
for (j = 0; j < 3; j++)
|
| 708 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*u[j]);
|
| 709 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK)
|
| 710 |
return(rv);
|
| 711 |
v1ent[3] = "_rv4";
|
| 712 |
for (i = 1; i <= 4*mg_nqcdivs; i++) {
|
| 713 |
theta = i*(PI/2)/mg_nqcdivs;
|
| 714 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 715 |
return(rv);
|
| 716 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK)
|
| 717 |
return(rv);
|
| 718 |
for (j = 0; j < 3; j++) {
|
| 719 |
d = u[j]*cos(theta) + v[j]*sin(theta);
|
| 720 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*d);
|
| 721 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*d);
|
| 722 |
}
|
| 723 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK)
|
| 724 |
return(rv);
|
| 725 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK)
|
| 726 |
return(rv);
|
| 727 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK)
|
| 728 |
return(rv);
|
| 729 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK)
|
| 730 |
return(rv);
|
| 731 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK)
|
| 732 |
return(rv);
|
| 733 |
}
|
| 734 |
}
|
| 735 |
return(MG_OK);
|
| 736 |
}
|
| 737 |
|
| 738 |
|
| 739 |
static int
|
| 740 |
e_cone(ac, av) /* turn a cone into polygons */
|
| 741 |
int ac;
|
| 742 |
char **av;
|
| 743 |
{
|
| 744 |
static char p3[3][24], p4[3][24], n3[3][24], n4[3][24];
|
| 745 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_cv1","="};
|
| 746 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_cv2","=","_cv3"};
|
| 747 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_cv3","="};
|
| 748 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]};
|
| 749 |
static char *n3ent[5] = {mg_ename[MG_E_NORMAL],n3[0],n3[1],n3[2]};
|
| 750 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_cv4","="};
|
| 751 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]};
|
| 752 |
static char *n4ent[5] = {mg_ename[MG_E_NORMAL],n4[0],n4[1],n4[2]};
|
| 753 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_cv1","_cv2","_cv3","_cv4"};
|
| 754 |
char *v1n;
|
| 755 |
register C_VERTEX *cv1, *cv2;
|
| 756 |
register int i, j;
|
| 757 |
FVECT u, v, w;
|
| 758 |
double rad1, rad2;
|
| 759 |
int sgn;
|
| 760 |
double n1off, n2off;
|
| 761 |
double d;
|
| 762 |
int rv;
|
| 763 |
double theta;
|
| 764 |
|
| 765 |
if (ac != 5)
|
| 766 |
return(MG_EARGC);
|
| 767 |
if ((cv1 = c_getvert(av[1])) == NULL ||
|
| 768 |
(cv2 = c_getvert(av[3])) == NULL)
|
| 769 |
return(MG_EUNDEF);
|
| 770 |
v1n = av[1];
|
| 771 |
if (!isflt(av[2]) || !isflt(av[4]))
|
| 772 |
return(MG_ETYPE);
|
| 773 |
rad1 = atof(av[2]);
|
| 774 |
round0(rad1);
|
| 775 |
rad2 = atof(av[4]);
|
| 776 |
round0(rad2);
|
| 777 |
if (rad1 == 0.) {
|
| 778 |
if (rad2 == 0.)
|
| 779 |
return(MG_EILL);
|
| 780 |
} else if (rad2 != 0.) {
|
| 781 |
if (rad1 < 0. ^ rad2 < 0.)
|
| 782 |
return(MG_EILL);
|
| 783 |
} else { /* swap */
|
| 784 |
C_VERTEX *cv;
|
| 785 |
|
| 786 |
cv = cv1;
|
| 787 |
cv1 = cv2;
|
| 788 |
cv2 = cv;
|
| 789 |
v1n = av[3];
|
| 790 |
d = rad1;
|
| 791 |
rad1 = rad2;
|
| 792 |
rad2 = d;
|
| 793 |
}
|
| 794 |
sgn = rad2 < 0. ? -1 : 1;
|
| 795 |
/* initialize */
|
| 796 |
for (j = 0; j < 3; j++)
|
| 797 |
w[j] = cv1->p[j] - cv2->p[j];
|
| 798 |
if ((d = normalize(w)) == 0.)
|
| 799 |
return(MG_EILL);
|
| 800 |
n1off = n2off = (rad2 - rad1)/d;
|
| 801 |
if (warpconends) { /* hack for e_sph and e_torus */
|
| 802 |
d = atan(n2off) - (PI/4)/mg_nqcdivs;
|
| 803 |
if (d <= -PI/2+FTINY)
|
| 804 |
n2off = -FHUGE;
|
| 805 |
else
|
| 806 |
n2off = tan(d);
|
| 807 |
}
|
| 808 |
make_axes(u, v, w);
|
| 809 |
for (j = 0; j < 3; j++) {
|
| 810 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*u[j]);
|
| 811 |
if (n2off <= -FHUGE)
|
| 812 |
sprintf(n3[j], FLTFMT, -w[j]);
|
| 813 |
else
|
| 814 |
sprintf(n3[j], FLTFMT, u[j] + w[j]*n2off);
|
| 815 |
}
|
| 816 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK)
|
| 817 |
return(rv);
|
| 818 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK)
|
| 819 |
return(rv);
|
| 820 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK)
|
| 821 |
return(rv);
|
| 822 |
if (rad1 == 0.) { /* triangles */
|
| 823 |
v1ent[3] = v1n;
|
| 824 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 825 |
return(rv);
|
| 826 |
for (j = 0; j < 3; j++)
|
| 827 |
sprintf(n4[j], FLTFMT, w[j]);
|
| 828 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK)
|
| 829 |
return(rv);
|
| 830 |
for (i = 1; i <= 4*mg_nqcdivs; i++) {
|
| 831 |
theta = sgn*i*(PI/2)/mg_nqcdivs;
|
| 832 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK)
|
| 833 |
return(rv);
|
| 834 |
for (j = 0; j < 3; j++) {
|
| 835 |
d = u[j]*cos(theta) + v[j]*sin(theta);
|
| 836 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d);
|
| 837 |
if (n2off > -FHUGE)
|
| 838 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off);
|
| 839 |
}
|
| 840 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK)
|
| 841 |
return(rv);
|
| 842 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK)
|
| 843 |
return(rv);
|
| 844 |
if (n2off > -FHUGE &&
|
| 845 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK)
|
| 846 |
return(rv);
|
| 847 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK)
|
| 848 |
return(rv);
|
| 849 |
}
|
| 850 |
} else { /* quads */
|
| 851 |
v1ent[3] = "_cv4";
|
| 852 |
if (warpconends) { /* hack for e_sph and e_torus */
|
| 853 |
d = atan(n1off) + (PI/4)/mg_nqcdivs;
|
| 854 |
if (d >= PI/2-FTINY)
|
| 855 |
n1off = FHUGE;
|
| 856 |
else
|
| 857 |
n1off = tan(atan(n1off)+(PI/4)/mg_nqcdivs);
|
| 858 |
}
|
| 859 |
for (j = 0; j < 3; j++) {
|
| 860 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*u[j]);
|
| 861 |
if (n1off >= FHUGE)
|
| 862 |
sprintf(n4[j], FLTFMT, w[j]);
|
| 863 |
else
|
| 864 |
sprintf(n4[j], FLTFMT, u[j] + w[j]*n1off);
|
| 865 |
}
|
| 866 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK)
|
| 867 |
return(rv);
|
| 868 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK)
|
| 869 |
return(rv);
|
| 870 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK)
|
| 871 |
return(rv);
|
| 872 |
for (i = 1; i <= 4*mg_nqcdivs; i++) {
|
| 873 |
theta = sgn*i*(PI/2)/mg_nqcdivs;
|
| 874 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK)
|
| 875 |
return(rv);
|
| 876 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK)
|
| 877 |
return(rv);
|
| 878 |
for (j = 0; j < 3; j++) {
|
| 879 |
d = u[j]*cos(theta) + v[j]*sin(theta);
|
| 880 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d);
|
| 881 |
if (n2off > -FHUGE)
|
| 882 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off);
|
| 883 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*d);
|
| 884 |
if (n1off < FHUGE)
|
| 885 |
sprintf(n4[j], FLTFMT, d + w[j]*n1off);
|
| 886 |
}
|
| 887 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK)
|
| 888 |
return(rv);
|
| 889 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK)
|
| 890 |
return(rv);
|
| 891 |
if (n2off > -FHUGE &&
|
| 892 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK)
|
| 893 |
return(rv);
|
| 894 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK)
|
| 895 |
return(rv);
|
| 896 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK)
|
| 897 |
return(rv);
|
| 898 |
if (n1off < FHUGE &&
|
| 899 |
(rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK)
|
| 900 |
return(rv);
|
| 901 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK)
|
| 902 |
return(rv);
|
| 903 |
}
|
| 904 |
}
|
| 905 |
return(MG_OK);
|
| 906 |
}
|
| 907 |
|
| 908 |
|
| 909 |
static int
|
| 910 |
e_prism(ac, av) /* turn a prism into polygons */
|
| 911 |
int ac;
|
| 912 |
char **av;
|
| 913 |
{
|
| 914 |
static char p[3][24];
|
| 915 |
static char *vent[5] = {mg_ename[MG_E_VERTEX],NULL,"="};
|
| 916 |
static char *pent[5] = {mg_ename[MG_E_POINT],p[0],p[1],p[2]};
|
| 917 |
static char *znorm[5] = {mg_ename[MG_E_NORMAL],"0","0","0"};
|
| 918 |
char *newav[MG_MAXARGC], nvn[MG_MAXARGC-1][8];
|
| 919 |
double length;
|
| 920 |
int hasnorm;
|
| 921 |
FVECT v1, v2, v3, norm;
|
| 922 |
register C_VERTEX *cv;
|
| 923 |
C_VERTEX *cv0;
|
| 924 |
int rv;
|
| 925 |
register int i, j;
|
| 926 |
/* check arguments */
|
| 927 |
if (ac < 5)
|
| 928 |
return(MG_EARGC);
|
| 929 |
if (!isflt(av[ac-1]))
|
| 930 |
return(MG_ETYPE);
|
| 931 |
length = atof(av[ac-1]);
|
| 932 |
if (length <= FTINY && length >= -FTINY)
|
| 933 |
return(MG_EILL);
|
| 934 |
/* compute face normal */
|
| 935 |
if ((cv0 = c_getvert(av[1])) == NULL)
|
| 936 |
return(MG_EUNDEF);
|
| 937 |
hasnorm = 0;
|
| 938 |
norm[0] = norm[1] = norm[2] = 0.;
|
| 939 |
v1[0] = v1[1] = v1[2] = 0.;
|
| 940 |
for (i = 2; i < ac-1; i++) {
|
| 941 |
if ((cv = c_getvert(av[i])) == NULL)
|
| 942 |
return(MG_EUNDEF);
|
| 943 |
hasnorm += !is0vect(cv->n);
|
| 944 |
v2[0] = cv->p[0] - cv0->p[0];
|
| 945 |
v2[1] = cv->p[1] - cv0->p[1];
|
| 946 |
v2[2] = cv->p[2] - cv0->p[2];
|
| 947 |
fcross(v3, v1, v2);
|
| 948 |
norm[0] += v3[0];
|
| 949 |
norm[1] += v3[1];
|
| 950 |
norm[2] += v3[2];
|
| 951 |
VCOPY(v1, v2);
|
| 952 |
}
|
| 953 |
if (normalize(norm) == 0.)
|
| 954 |
return(MG_EILL);
|
| 955 |
/* create moved vertices */
|
| 956 |
for (i = 1; i < ac-1; i++) {
|
| 957 |
sprintf(nvn[i-1], "_pv%d", i);
|
| 958 |
vent[1] = nvn[i-1];
|
| 959 |
vent[3] = av[i];
|
| 960 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK)
|
| 961 |
return(rv);
|
| 962 |
cv = c_getvert(av[i]); /* checked above */
|
| 963 |
for (j = 0; j < 3; j++)
|
| 964 |
sprintf(p[j], FLTFMT, cv->p[j] - length*norm[j]);
|
| 965 |
if ((rv = mg_handle(MG_E_POINT, 4, pent)) != MG_OK)
|
| 966 |
return(rv);
|
| 967 |
}
|
| 968 |
/* make faces */
|
| 969 |
newav[0] = mg_ename[MG_E_FACE];
|
| 970 |
/* do the side faces */
|
| 971 |
newav[5] = NULL;
|
| 972 |
newav[3] = av[ac-2];
|
| 973 |
newav[4] = nvn[ac-3];
|
| 974 |
for (i = 1; i < ac-1; i++) {
|
| 975 |
newav[1] = nvn[i-1];
|
| 976 |
newav[2] = av[i];
|
| 977 |
if ((rv = mg_handle(MG_E_FACE, 5, newav)) != MG_OK)
|
| 978 |
return(rv);
|
| 979 |
newav[3] = newav[2];
|
| 980 |
newav[4] = newav[1];
|
| 981 |
}
|
| 982 |
/* do top face */
|
| 983 |
for (i = 1; i < ac-1; i++) {
|
| 984 |
if (hasnorm) { /* zero normals */
|
| 985 |
vent[1] = nvn[i-1];
|
| 986 |
if ((rv = mg_handle(MG_E_VERTEX, 2, vent)) != MG_OK)
|
| 987 |
return(rv);
|
| 988 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK)
|
| 989 |
return(rv);
|
| 990 |
}
|
| 991 |
newav[ac-1-i] = nvn[i-1]; /* reverse */
|
| 992 |
}
|
| 993 |
if ((rv = mg_handle(MG_E_FACE, ac-1, newav)) != MG_OK)
|
| 994 |
return(rv);
|
| 995 |
/* do bottom face */
|
| 996 |
if (hasnorm)
|
| 997 |
for (i = 1; i < ac-1; i++) {
|
| 998 |
vent[1] = nvn[i-1];
|
| 999 |
vent[3] = av[i];
|
| 1000 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK)
|
| 1001 |
return(rv);
|
| 1002 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK)
|
| 1003 |
return(rv);
|
| 1004 |
newav[i] = nvn[i-1];
|
| 1005 |
}
|
| 1006 |
else
|
| 1007 |
for (i = 1; i < ac-1; i++)
|
| 1008 |
newav[i] = av[i];
|
| 1009 |
newav[i] = NULL;
|
| 1010 |
if ((rv = mg_handle(MG_E_FACE, i, newav)) != MG_OK)
|
| 1011 |
return(rv);
|
| 1012 |
return(MG_OK);
|
| 1013 |
}
|
| 1014 |
|
| 1015 |
|
| 1016 |
static int
|
| 1017 |
put_cxy() /* put out current xy chromaticities */
|
| 1018 |
{
|
| 1019 |
static char xbuf[24], ybuf[24];
|
| 1020 |
static char *ccom[4] = {mg_ename[MG_E_CXY], xbuf, ybuf};
|
| 1021 |
int rv;
|
| 1022 |
|
| 1023 |
sprintf(xbuf, "%.4f", c_ccolor->cx);
|
| 1024 |
sprintf(ybuf, "%.4f", c_ccolor->cy);
|
| 1025 |
if ((rv = mg_handle(MG_E_CXY, 3, ccom)) != MG_OK)
|
| 1026 |
return(rv);
|
| 1027 |
return(MG_OK);
|
| 1028 |
}
|
| 1029 |
|
| 1030 |
|
| 1031 |
static int
|
| 1032 |
put_cspec() /* put out current color spectrum */
|
| 1033 |
{
|
| 1034 |
char wl[2][6], vbuf[C_CNSS][24];
|
| 1035 |
char *newav[C_CNSS+4];
|
| 1036 |
double sf;
|
| 1037 |
register int i;
|
| 1038 |
|
| 1039 |
if (mg_ehand[MG_E_CSPEC] != c_hcolor) {
|
| 1040 |
sprintf(wl[0], "%d", C_CMINWL);
|
| 1041 |
sprintf(wl[1], "%d", C_CMAXWL);
|
| 1042 |
newav[0] = mg_ename[MG_E_CSPEC];
|
| 1043 |
newav[1] = wl[0];
|
| 1044 |
newav[2] = wl[1];
|
| 1045 |
sf = (double)C_CNSS / c_ccolor->ssum;
|
| 1046 |
for (i = 0; i < C_CNSS; i++) {
|
| 1047 |
sprintf(vbuf[i], "%.4f", sf*c_ccolor->ssamp[i]);
|
| 1048 |
newav[i+3] = vbuf[i];
|
| 1049 |
}
|
| 1050 |
newav[C_CNSS+3] = NULL;
|
| 1051 |
if ((i = mg_handle(MG_E_CSPEC, C_CNSS+3, newav)) != MG_OK)
|
| 1052 |
return(i);
|
| 1053 |
}
|
| 1054 |
return(MG_OK);
|
| 1055 |
}
|
| 1056 |
|
| 1057 |
|
| 1058 |
static int
|
| 1059 |
e_cspec(ac, av) /* handle spectral color */
|
| 1060 |
int ac;
|
| 1061 |
char **av;
|
| 1062 |
{
|
| 1063 |
/* convert to xy chromaticity */
|
| 1064 |
c_ccvt(c_ccolor, C_CSXY);
|
| 1065 |
/* if it's really their handler, use it */
|
| 1066 |
if (mg_ehand[MG_E_CXY] != c_hcolor)
|
| 1067 |
return(put_cxy());
|
| 1068 |
return(MG_OK);
|
| 1069 |
}
|
| 1070 |
|
| 1071 |
|
| 1072 |
static int
|
| 1073 |
e_cmix(ac, av) /* handle mixing of colors */
|
| 1074 |
int ac;
|
| 1075 |
char **av;
|
| 1076 |
{
|
| 1077 |
/*
|
| 1078 |
* Contorted logic works as follows:
|
| 1079 |
* 1. the colors are already mixed in c_hcolor() support function
|
| 1080 |
* 2. if we would handle a spectral result, make sure it's not
|
| 1081 |
* 3. if c_hcolor() would handle a spectral result, don't bother
|
| 1082 |
* 4. otherwise, make cspec entity and pass it to their handler
|
| 1083 |
* 5. if we have only xy results, handle it as c_spec() would
|
| 1084 |
*/
|
| 1085 |
if (mg_ehand[MG_E_CSPEC] == e_cspec)
|
| 1086 |
c_ccvt(c_ccolor, C_CSXY);
|
| 1087 |
else if (c_ccolor->flags & C_CDSPEC)
|
| 1088 |
return(put_cspec());
|
| 1089 |
if (mg_ehand[MG_E_CXY] != c_hcolor)
|
| 1090 |
return(put_cxy());
|
| 1091 |
return(MG_OK);
|
| 1092 |
}
|
| 1093 |
|
| 1094 |
|
| 1095 |
static int
|
| 1096 |
e_cct(ac, av) /* handle color temperature */
|
| 1097 |
int ac;
|
| 1098 |
char **av;
|
| 1099 |
{
|
| 1100 |
/*
|
| 1101 |
* Logic is similar to e_cmix here. Support handler has already
|
| 1102 |
* converted temperature to spectral color. Put it out as such
|
| 1103 |
* if they support it, otherwise convert to xy chromaticity and
|
| 1104 |
* put it out if they handle it.
|
| 1105 |
*/
|
| 1106 |
if (mg_ehand[MG_E_CSPEC] != e_cspec)
|
| 1107 |
return(put_cspec());
|
| 1108 |
c_ccvt(c_ccolor, C_CSXY);
|
| 1109 |
if (mg_ehand[MG_E_CXY] != c_hcolor)
|
| 1110 |
return(put_cxy());
|
| 1111 |
return(MG_OK);
|
| 1112 |
}
|
