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/* Copyright (c) 1996 Regents of the University of California */ |
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|
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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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/* |
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* Parse an MGF file, converting or discarding unsupported entities |
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*/ |
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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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/* |
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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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|
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char mg_ename[MG_NENTITIES][MG_MAXELEN] = MG_NAMELIST; |
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|
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/* Handler routines for each entity */ |
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|
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int (*mg_ehand[MG_NENTITIES])(); |
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|
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/* Handler routine for unknown entities */ |
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|
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int (*mg_uhand)() = mg_defuhand; |
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|
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unsigned mg_nunknown; /* count of unknown entities */ |
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|
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/* error messages */ |
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|
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char *mg_err[MG_NERRS] = MG_ERRLIST; |
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|
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MG_FCTXT *mg_file; /* current file context pointer */ |
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|
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int mg_nqcdivs = MG_NQCD; /* number of divisions per quarter circle */ |
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|
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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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|
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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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|
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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_cct(), /* color temperature */ |
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e_cmix(), /* color mixtures */ |
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e_cspec(); /* color spectra */ |
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|
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int e_include(), /* include file */ |
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e_sph(), /* sphere */ |
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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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|
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/* alternate handler support functions */ |
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|
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static int (*e_supp[MG_NENTITIES])(); |
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|
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static char FLTFMT[] = "%.12g"; |
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|
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static int warpconends; /* hack for generating good normals */ |
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|
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|
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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 */ |
178 |
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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|
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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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|
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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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|
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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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|
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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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|
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|
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int |
227 |
mg_open(ctx, fn) /* open new input file */ |
228 |
register MG_FCTXT *ctx; |
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char *fn; |
230 |
{ |
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static int nfids; |
232 |
register char *cp; |
233 |
|
234 |
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; |
240 |
mg_file = ctx; |
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return(MG_OK); |
242 |
} |
243 |
/* 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 |
248 |
strcpy(ctx->fname, fn); |
249 |
ctx->fp = fopen(ctx->fname, "r"); |
250 |
if (ctx->fp == NULL) |
251 |
return(MG_ENOFILE); |
252 |
ctx->prev = mg_file; /* establish new context */ |
253 |
mg_file = ctx; |
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return(MG_OK); |
255 |
} |
256 |
|
257 |
|
258 |
void |
259 |
mg_close() /* close input file */ |
260 |
{ |
261 |
register MG_FCTXT *ctx = mg_file; |
262 |
|
263 |
mg_file = ctx->prev; /* restore enclosing context */ |
264 |
if (ctx->fp != stdin) /* close file if it's a file */ |
265 |
fclose(ctx->fp); |
266 |
} |
267 |
|
268 |
|
269 |
void |
270 |
mg_fgetpos(pos) /* get current position in input file */ |
271 |
register MG_FPOS *pos; |
272 |
{ |
273 |
extern long ftell(); |
274 |
|
275 |
pos->fid = mg_file->fid; |
276 |
pos->lineno = mg_file->lineno; |
277 |
pos->offset = ftell(mg_file->fp); |
278 |
} |
279 |
|
280 |
|
281 |
int |
282 |
mg_fgoto(pos) /* reposition input file pointer */ |
283 |
register MG_FPOS *pos; |
284 |
{ |
285 |
if (pos->fid != mg_file->fid) |
286 |
return(MG_ESEEK); |
287 |
if (pos->lineno == mg_file->lineno) |
288 |
return(MG_OK); |
289 |
if (mg_file->fp == stdin) |
290 |
return(MG_ESEEK); /* cannot seek on standard input */ |
291 |
if (fseek(mg_file->fp, pos->offset, 0) == EOF) |
292 |
return(MG_ESEEK); |
293 |
mg_file->lineno = pos->lineno; |
294 |
return(MG_OK); |
295 |
} |
296 |
|
297 |
|
298 |
int |
299 |
mg_read() /* read next line from file */ |
300 |
{ |
301 |
register int len = 0; |
302 |
|
303 |
do { |
304 |
if (fgets(mg_file->inpline+len, |
305 |
MG_MAXLINE-len, mg_file->fp) == NULL) |
306 |
return(len); |
307 |
len += strlen(mg_file->inpline+len); |
308 |
if (len >= MG_MAXLINE-1) |
309 |
return(len); |
310 |
mg_file->lineno++; |
311 |
} while (len > 1 && mg_file->inpline[len-2] == '\\'); |
312 |
|
313 |
return(len); |
314 |
} |
315 |
|
316 |
|
317 |
int |
318 |
mg_parse() /* parse current input line */ |
319 |
{ |
320 |
char abuf[MG_MAXLINE]; |
321 |
char *argv[MG_MAXARGC]; |
322 |
int en; |
323 |
register char *cp, *cp2, **ap; |
324 |
/* copy line, removing escape chars */ |
325 |
cp = abuf; cp2 = mg_file->inpline; |
326 |
while ((*cp++ = *cp2++)) |
327 |
if (cp2[0] == '\n' && cp2[-1] == '\\') |
328 |
cp--; |
329 |
cp = abuf; ap = argv; /* break into words */ |
330 |
for ( ; ; ) { |
331 |
while (isspace(*cp)) |
332 |
*cp++ = '\0'; |
333 |
if (!*cp) |
334 |
break; |
335 |
if (ap - argv >= MG_MAXARGC-1) |
336 |
return(MG_EARGC); |
337 |
*ap++ = cp; |
338 |
while (*++cp && !isspace(*cp)) |
339 |
; |
340 |
} |
341 |
if (ap == argv) |
342 |
return(MG_OK); /* no words in line */ |
343 |
*ap = NULL; |
344 |
/* else handle it */ |
345 |
return(mg_handle(-1, ap-argv, argv)); |
346 |
} |
347 |
|
348 |
|
349 |
int |
350 |
mg_load(fn) /* load an MGF file */ |
351 |
char *fn; |
352 |
{ |
353 |
MG_FCTXT cntxt; |
354 |
int rval; |
355 |
register int nbr; |
356 |
|
357 |
if ((rval = mg_open(&cntxt, fn)) != MG_OK) { |
358 |
fprintf(stderr, "%s: %s\n", fn, mg_err[rval]); |
359 |
return(rval); |
360 |
} |
361 |
while ((nbr = mg_read()) > 0) { /* parse each line */ |
362 |
if (nbr >= MG_MAXLINE-1) { |
363 |
fprintf(stderr, "%s: %d: %s\n", cntxt.fname, |
364 |
cntxt.lineno, mg_err[rval=MG_ELINE]); |
365 |
break; |
366 |
} |
367 |
if ((rval = mg_parse()) != MG_OK) { |
368 |
fprintf(stderr, "%s: %d: %s:\n%s", cntxt.fname, |
369 |
cntxt.lineno, mg_err[rval], |
370 |
cntxt.inpline); |
371 |
break; |
372 |
} |
373 |
} |
374 |
mg_close(); |
375 |
return(rval); |
376 |
} |
377 |
|
378 |
|
379 |
int |
380 |
mg_defuhand(ac, av) /* default handler for unknown entities */ |
381 |
int ac; |
382 |
char **av; |
383 |
{ |
384 |
if (mg_nunknown++ == 0) /* report first incident */ |
385 |
fprintf(stderr, "%s: %d: %s: %s\n", mg_file->fname, |
386 |
mg_file->lineno, mg_err[MG_EUNK], av[0]); |
387 |
return(MG_OK); |
388 |
} |
389 |
|
390 |
|
391 |
void |
392 |
mg_clear() /* clear parser history */ |
393 |
{ |
394 |
c_clearall(); /* clear context tables */ |
395 |
while (mg_file != NULL) /* reset our file context */ |
396 |
mg_close(); |
397 |
} |
398 |
|
399 |
|
400 |
/**************************************************************************** |
401 |
* The following routines handle unsupported entities |
402 |
*/ |
403 |
|
404 |
|
405 |
static int |
406 |
e_any_toss(ac, av) /* discard an unwanted entity */ |
407 |
int ac; |
408 |
char **av; |
409 |
{ |
410 |
return(MG_OK); |
411 |
} |
412 |
|
413 |
|
414 |
int |
415 |
e_include(ac, av) /* include file */ |
416 |
int ac; |
417 |
char **av; |
418 |
{ |
419 |
char *xfarg[MG_MAXARGC]; |
420 |
MG_FCTXT ictx; |
421 |
XF_SPEC *xf_orig = xf_context; |
422 |
register int rv; |
423 |
|
424 |
if (ac < 2) |
425 |
return(MG_EARGC); |
426 |
if ((rv = mg_open(&ictx, av[1])) != MG_OK) |
427 |
return(rv); |
428 |
if (ac > 2) { |
429 |
register int i; |
430 |
|
431 |
xfarg[0] = mg_ename[MG_E_XF]; |
432 |
for (i = 1; i < ac-1; i++) |
433 |
xfarg[i] = av[i+1]; |
434 |
xfarg[ac-1] = NULL; |
435 |
if ((rv = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) { |
436 |
mg_close(); |
437 |
return(rv); |
438 |
} |
439 |
} |
440 |
do { |
441 |
while ((rv = mg_read()) > 0) { |
442 |
if (rv >= MG_MAXLINE-1) { |
443 |
fprintf(stderr, "%s: %d: %s\n", ictx.fname, |
444 |
ictx.lineno, mg_err[MG_ELINE]); |
445 |
mg_close(); |
446 |
return(MG_EINCL); |
447 |
} |
448 |
if ((rv = mg_parse()) != MG_OK) { |
449 |
fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname, |
450 |
ictx.lineno, mg_err[rv], |
451 |
ictx.inpline); |
452 |
mg_close(); |
453 |
return(MG_EINCL); |
454 |
} |
455 |
} |
456 |
if (ac > 2) |
457 |
if ((rv = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) { |
458 |
mg_close(); |
459 |
return(rv); |
460 |
} |
461 |
} while (xf_context != xf_orig); |
462 |
mg_close(); |
463 |
return(MG_OK); |
464 |
} |
465 |
|
466 |
|
467 |
static void |
468 |
make_axes(u, v, w) /* compute u and v given w (normalized) */ |
469 |
FVECT u, v, w; |
470 |
{ |
471 |
register int i; |
472 |
|
473 |
v[0] = v[1] = v[2] = 0.; |
474 |
for (i = 0; i < 3; i++) |
475 |
if (w[i] < .6 && w[i] > -.6) |
476 |
break; |
477 |
v[i] = 1.; |
478 |
fcross(u, v, w); |
479 |
normalize(u); |
480 |
fcross(v, w, u); |
481 |
} |
482 |
|
483 |
|
484 |
int |
485 |
e_sph(ac, av) /* expand a sphere into cones */ |
486 |
int ac; |
487 |
char **av; |
488 |
{ |
489 |
static char p2x[24], p2y[24], p2z[24], r1[24], r2[24]; |
490 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_sv1","=","_sv2"}; |
491 |
static char *v2ent[4] = {mg_ename[MG_E_VERTEX],"_sv2","="}; |
492 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2x,p2y,p2z}; |
493 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_sv1",r1,"_sv2",r2}; |
494 |
register C_VERTEX *cv; |
495 |
register int i; |
496 |
int rval; |
497 |
double rad; |
498 |
double theta; |
499 |
|
500 |
if (ac != 3) |
501 |
return(MG_EARGC); |
502 |
if ((cv = c_getvert(av[1])) == NULL) |
503 |
return(MG_EUNDEF); |
504 |
if (!isflt(av[2])) |
505 |
return(MG_ETYPE); |
506 |
rad = atof(av[2]); |
507 |
/* initialize */ |
508 |
warpconends = 1; |
509 |
if ((rval = mg_handle(MG_E_VERTEX, 3, v2ent)) != MG_OK) |
510 |
return(rval); |
511 |
sprintf(p2x, FLTFMT, cv->p[0]); |
512 |
sprintf(p2y, FLTFMT, cv->p[1]); |
513 |
sprintf(p2z, FLTFMT, cv->p[2]+rad); |
514 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
515 |
return(rval); |
516 |
r2[0] = '0'; r2[1] = '\0'; |
517 |
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
518 |
theta = i*(PI/2)/mg_nqcdivs; |
519 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
520 |
return(rval); |
521 |
sprintf(p2z, FLTFMT, cv->p[2]+rad*cos(theta)); |
522 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
523 |
return(rval); |
524 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
525 |
return(rval); |
526 |
strcpy(r1, r2); |
527 |
sprintf(r2, FLTFMT, rad*sin(theta)); |
528 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
529 |
return(rval); |
530 |
} |
531 |
warpconends = 0; |
532 |
return(MG_OK); |
533 |
} |
534 |
|
535 |
|
536 |
int |
537 |
e_torus(ac, av) /* expand a torus into cones */ |
538 |
int ac; |
539 |
char **av; |
540 |
{ |
541 |
static char p2[3][24], r1[24], r2[24]; |
542 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_tv1","=","_tv2"}; |
543 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_tv2","="}; |
544 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2[0],p2[1],p2[2]}; |
545 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_tv1",r1,"_tv2",r2}; |
546 |
register C_VERTEX *cv; |
547 |
register int i, j; |
548 |
int rval; |
549 |
int sgn; |
550 |
double minrad, maxrad, avgrad; |
551 |
double theta; |
552 |
|
553 |
if (ac != 4) |
554 |
return(MG_EARGC); |
555 |
if ((cv = c_getvert(av[1])) == NULL) |
556 |
return(MG_EUNDEF); |
557 |
if (is0vect(cv->n)) |
558 |
return(MG_EILL); |
559 |
if (!isflt(av[2]) || !isflt(av[3])) |
560 |
return(MG_ETYPE); |
561 |
minrad = atof(av[2]); |
562 |
round0(minrad); |
563 |
maxrad = atof(av[3]); |
564 |
/* check orientation */ |
565 |
if (minrad > 0.) |
566 |
sgn = 1; |
567 |
else if (minrad < 0.) |
568 |
sgn = -1; |
569 |
else if (maxrad > 0.) |
570 |
sgn = 1; |
571 |
else if (maxrad < 0.) |
572 |
sgn = -1; |
573 |
else |
574 |
return(MG_EILL); |
575 |
if (sgn*(maxrad-minrad) <= 0.) |
576 |
return(MG_EILL); |
577 |
/* initialize */ |
578 |
warpconends = 1; |
579 |
v2ent[3] = av[1]; |
580 |
for (j = 0; j < 3; j++) |
581 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
582 |
.5*sgn*(maxrad-minrad)*cv->n[j]); |
583 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
584 |
return(rval); |
585 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
586 |
return(rval); |
587 |
sprintf(r2, FLTFMT, avgrad=.5*(minrad+maxrad)); |
588 |
/* run outer section */ |
589 |
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
590 |
theta = i*(PI/2)/mg_nqcdivs; |
591 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
592 |
return(rval); |
593 |
for (j = 0; j < 3; j++) |
594 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
595 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
596 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
597 |
return(rval); |
598 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
599 |
return(rval); |
600 |
strcpy(r1, r2); |
601 |
sprintf(r2, FLTFMT, avgrad + .5*(maxrad-minrad)*sin(theta)); |
602 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
603 |
return(rval); |
604 |
} |
605 |
/* run inner section */ |
606 |
sprintf(r2, FLTFMT, -.5*(minrad+maxrad)); |
607 |
for ( ; i <= 4*mg_nqcdivs; i++) { |
608 |
theta = i*(PI/2)/mg_nqcdivs; |
609 |
for (j = 0; j < 3; j++) |
610 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
611 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
612 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
613 |
return(rval); |
614 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
615 |
return(rval); |
616 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
617 |
return(rval); |
618 |
strcpy(r1, r2); |
619 |
sprintf(r2, FLTFMT, -avgrad - .5*(maxrad-minrad)*sin(theta)); |
620 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
621 |
return(rval); |
622 |
} |
623 |
warpconends = 0; |
624 |
return(MG_OK); |
625 |
} |
626 |
|
627 |
|
628 |
int |
629 |
e_cyl(ac, av) /* replace a cylinder with equivalent cone */ |
630 |
int ac; |
631 |
char **av; |
632 |
{ |
633 |
static char *avnew[6] = {mg_ename[MG_E_CONE]}; |
634 |
|
635 |
if (ac != 4) |
636 |
return(MG_EARGC); |
637 |
avnew[1] = av[1]; |
638 |
avnew[2] = av[2]; |
639 |
avnew[3] = av[3]; |
640 |
avnew[4] = av[2]; |
641 |
return(mg_handle(MG_E_CONE, 5, avnew)); |
642 |
} |
643 |
|
644 |
|
645 |
int |
646 |
e_ring(ac, av) /* turn a ring into polygons */ |
647 |
int ac; |
648 |
char **av; |
649 |
{ |
650 |
static char p3[3][24], p4[3][24]; |
651 |
static char *nzent[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
652 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_rv1","="}; |
653 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_rv2","=","_rv3"}; |
654 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_rv3","="}; |
655 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
656 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_rv4","="}; |
657 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
658 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_rv1","_rv2","_rv3","_rv4"}; |
659 |
register C_VERTEX *cv; |
660 |
register int i, j; |
661 |
FVECT u, v; |
662 |
double minrad, maxrad; |
663 |
int rv; |
664 |
double theta, d; |
665 |
|
666 |
if (ac != 4) |
667 |
return(MG_EARGC); |
668 |
if ((cv = c_getvert(av[1])) == NULL) |
669 |
return(MG_EUNDEF); |
670 |
if (is0vect(cv->n)) |
671 |
return(MG_EILL); |
672 |
if (!isflt(av[2]) || !isflt(av[3])) |
673 |
return(MG_ETYPE); |
674 |
minrad = atof(av[2]); |
675 |
round0(minrad); |
676 |
maxrad = atof(av[3]); |
677 |
if (minrad < 0. || maxrad <= minrad) |
678 |
return(MG_EILL); |
679 |
/* initialize */ |
680 |
make_axes(u, v, cv->n); |
681 |
for (j = 0; j < 3; j++) |
682 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*u[j]); |
683 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
684 |
return(rv); |
685 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
686 |
return(rv); |
687 |
if (minrad == 0.) { /* closed */ |
688 |
v1ent[3] = av[1]; |
689 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
690 |
return(rv); |
691 |
if ((rv = mg_handle(MG_E_NORMAL, 4, nzent)) != MG_OK) |
692 |
return(rv); |
693 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
694 |
theta = i*(PI/2)/mg_nqcdivs; |
695 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
696 |
return(rv); |
697 |
for (j = 0; j < 3; j++) |
698 |
sprintf(p3[j], FLTFMT, cv->p[j] + |
699 |
maxrad*u[j]*cos(theta) + |
700 |
maxrad*v[j]*sin(theta)); |
701 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
702 |
return(rv); |
703 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
704 |
return(rv); |
705 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK) |
706 |
return(rv); |
707 |
} |
708 |
} else { /* open */ |
709 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
710 |
return(rv); |
711 |
for (j = 0; j < 3; j++) |
712 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*u[j]); |
713 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
714 |
return(rv); |
715 |
v1ent[3] = "_rv4"; |
716 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
717 |
theta = i*(PI/2)/mg_nqcdivs; |
718 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
719 |
return(rv); |
720 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
721 |
return(rv); |
722 |
for (j = 0; j < 3; j++) { |
723 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
724 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*d); |
725 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*d); |
726 |
} |
727 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
728 |
return(rv); |
729 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
730 |
return(rv); |
731 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
732 |
return(rv); |
733 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
734 |
return(rv); |
735 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK) |
736 |
return(rv); |
737 |
} |
738 |
} |
739 |
return(MG_OK); |
740 |
} |
741 |
|
742 |
|
743 |
int |
744 |
e_cone(ac, av) /* turn a cone into polygons */ |
745 |
int ac; |
746 |
char **av; |
747 |
{ |
748 |
static char p3[3][24], p4[3][24], n3[3][24], n4[3][24]; |
749 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_cv1","="}; |
750 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_cv2","=","_cv3"}; |
751 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_cv3","="}; |
752 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
753 |
static char *n3ent[5] = {mg_ename[MG_E_NORMAL],n3[0],n3[1],n3[2]}; |
754 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_cv4","="}; |
755 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
756 |
static char *n4ent[5] = {mg_ename[MG_E_NORMAL],n4[0],n4[1],n4[2]}; |
757 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_cv1","_cv2","_cv3","_cv4"}; |
758 |
char *v1n; |
759 |
register C_VERTEX *cv1, *cv2; |
760 |
register int i, j; |
761 |
FVECT u, v, w; |
762 |
double rad1, rad2; |
763 |
int sgn; |
764 |
double n1off, n2off; |
765 |
double d; |
766 |
int rv; |
767 |
double theta; |
768 |
|
769 |
if (ac != 5) |
770 |
return(MG_EARGC); |
771 |
if ((cv1 = c_getvert(av[1])) == NULL || |
772 |
(cv2 = c_getvert(av[3])) == NULL) |
773 |
return(MG_EUNDEF); |
774 |
v1n = av[1]; |
775 |
if (!isflt(av[2]) || !isflt(av[4])) |
776 |
return(MG_ETYPE); |
777 |
rad1 = atof(av[2]); |
778 |
round0(rad1); |
779 |
rad2 = atof(av[4]); |
780 |
round0(rad2); |
781 |
if (rad1 == 0.) { |
782 |
if (rad2 == 0.) |
783 |
return(MG_EILL); |
784 |
} else if (rad2 != 0.) { |
785 |
if (rad1 < 0. ^ rad2 < 0.) |
786 |
return(MG_EILL); |
787 |
} else { /* swap */ |
788 |
C_VERTEX *cv; |
789 |
|
790 |
cv = cv1; |
791 |
cv1 = cv2; |
792 |
cv2 = cv; |
793 |
v1n = av[3]; |
794 |
d = rad1; |
795 |
rad1 = rad2; |
796 |
rad2 = d; |
797 |
} |
798 |
sgn = rad2 < 0. ? -1 : 1; |
799 |
/* initialize */ |
800 |
for (j = 0; j < 3; j++) |
801 |
w[j] = cv1->p[j] - cv2->p[j]; |
802 |
if ((d = normalize(w)) == 0.) |
803 |
return(MG_EILL); |
804 |
n1off = n2off = (rad2 - rad1)/d; |
805 |
if (warpconends) { /* hack for e_sph and e_torus */ |
806 |
d = atan(n2off) - (PI/4)/mg_nqcdivs; |
807 |
if (d <= -PI/2+FTINY) |
808 |
n2off = -FHUGE; |
809 |
else |
810 |
n2off = tan(d); |
811 |
} |
812 |
make_axes(u, v, w); |
813 |
for (j = 0; j < 3; j++) { |
814 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*u[j]); |
815 |
if (n2off <= -FHUGE) |
816 |
sprintf(n3[j], FLTFMT, -w[j]); |
817 |
else |
818 |
sprintf(n3[j], FLTFMT, u[j] + w[j]*n2off); |
819 |
} |
820 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
821 |
return(rv); |
822 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
823 |
return(rv); |
824 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
825 |
return(rv); |
826 |
if (rad1 == 0.) { /* triangles */ |
827 |
v1ent[3] = v1n; |
828 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
829 |
return(rv); |
830 |
for (j = 0; j < 3; j++) |
831 |
sprintf(n4[j], FLTFMT, w[j]); |
832 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
833 |
return(rv); |
834 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
835 |
theta = sgn*i*(PI/2)/mg_nqcdivs; |
836 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
837 |
return(rv); |
838 |
for (j = 0; j < 3; j++) { |
839 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
840 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
841 |
if (n2off > -FHUGE) |
842 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
843 |
} |
844 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
845 |
return(rv); |
846 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
847 |
return(rv); |
848 |
if (n2off > -FHUGE && |
849 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
850 |
return(rv); |
851 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK) |
852 |
return(rv); |
853 |
} |
854 |
} else { /* quads */ |
855 |
v1ent[3] = "_cv4"; |
856 |
if (warpconends) { /* hack for e_sph and e_torus */ |
857 |
d = atan(n1off) + (PI/4)/mg_nqcdivs; |
858 |
if (d >= PI/2-FTINY) |
859 |
n1off = FHUGE; |
860 |
else |
861 |
n1off = tan(atan(n1off)+(PI/4)/mg_nqcdivs); |
862 |
} |
863 |
for (j = 0; j < 3; j++) { |
864 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*u[j]); |
865 |
if (n1off >= FHUGE) |
866 |
sprintf(n4[j], FLTFMT, w[j]); |
867 |
else |
868 |
sprintf(n4[j], FLTFMT, u[j] + w[j]*n1off); |
869 |
} |
870 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
871 |
return(rv); |
872 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
873 |
return(rv); |
874 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
875 |
return(rv); |
876 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
877 |
theta = sgn*i*(PI/2)/mg_nqcdivs; |
878 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
879 |
return(rv); |
880 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
881 |
return(rv); |
882 |
for (j = 0; j < 3; j++) { |
883 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
884 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
885 |
if (n2off > -FHUGE) |
886 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
887 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*d); |
888 |
if (n1off < FHUGE) |
889 |
sprintf(n4[j], FLTFMT, d + w[j]*n1off); |
890 |
} |
891 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
892 |
return(rv); |
893 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
894 |
return(rv); |
895 |
if (n2off > -FHUGE && |
896 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
897 |
return(rv); |
898 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
899 |
return(rv); |
900 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
901 |
return(rv); |
902 |
if (n1off < FHUGE && |
903 |
(rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
904 |
return(rv); |
905 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK) |
906 |
return(rv); |
907 |
} |
908 |
} |
909 |
return(MG_OK); |
910 |
} |
911 |
|
912 |
|
913 |
int |
914 |
e_prism(ac, av) /* turn a prism into polygons */ |
915 |
int ac; |
916 |
char **av; |
917 |
{ |
918 |
static char p[3][24]; |
919 |
static char *vent[5] = {mg_ename[MG_E_VERTEX],NULL,"="}; |
920 |
static char *pent[5] = {mg_ename[MG_E_POINT],p[0],p[1],p[2]}; |
921 |
static char *znorm[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
922 |
char *newav[MG_MAXARGC], nvn[MG_MAXARGC-1][8]; |
923 |
double length; |
924 |
int hasnorm; |
925 |
FVECT v1, v2, v3, norm; |
926 |
register C_VERTEX *cv; |
927 |
C_VERTEX *cv0; |
928 |
int rv; |
929 |
register int i, j; |
930 |
/* check arguments */ |
931 |
if (ac < 5) |
932 |
return(MG_EARGC); |
933 |
if (!isflt(av[ac-1])) |
934 |
return(MG_ETYPE); |
935 |
length = atof(av[ac-1]); |
936 |
if (length <= FTINY && length >= -FTINY) |
937 |
return(MG_EILL); |
938 |
/* compute face normal */ |
939 |
if ((cv0 = c_getvert(av[1])) == NULL) |
940 |
return(MG_EUNDEF); |
941 |
hasnorm = 0; |
942 |
norm[0] = norm[1] = norm[2] = 0.; |
943 |
v1[0] = v1[1] = v1[2] = 0.; |
944 |
for (i = 2; i < ac-1; i++) { |
945 |
if ((cv = c_getvert(av[i])) == NULL) |
946 |
return(MG_EUNDEF); |
947 |
hasnorm += !is0vect(cv->n); |
948 |
v2[0] = cv->p[0] - cv0->p[0]; |
949 |
v2[1] = cv->p[1] - cv0->p[1]; |
950 |
v2[2] = cv->p[2] - cv0->p[2]; |
951 |
fcross(v3, v1, v2); |
952 |
norm[0] += v3[0]; |
953 |
norm[1] += v3[1]; |
954 |
norm[2] += v3[2]; |
955 |
VCOPY(v1, v2); |
956 |
} |
957 |
if (normalize(norm) == 0.) |
958 |
return(MG_EILL); |
959 |
/* create moved vertices */ |
960 |
for (i = 1; i < ac-1; i++) { |
961 |
sprintf(nvn[i-1], "_pv%d", i); |
962 |
vent[1] = nvn[i-1]; |
963 |
vent[3] = av[i]; |
964 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK) |
965 |
return(rv); |
966 |
cv = c_getvert(av[i]); /* checked above */ |
967 |
for (j = 0; j < 3; j++) |
968 |
sprintf(p[j], FLTFMT, cv->p[j] - length*norm[j]); |
969 |
if ((rv = mg_handle(MG_E_POINT, 4, pent)) != MG_OK) |
970 |
return(rv); |
971 |
} |
972 |
/* make faces */ |
973 |
newav[0] = mg_ename[MG_E_FACE]; |
974 |
/* do the side faces */ |
975 |
newav[5] = NULL; |
976 |
newav[3] = av[ac-2]; |
977 |
newav[4] = nvn[ac-3]; |
978 |
for (i = 1; i < ac-1; i++) { |
979 |
newav[1] = nvn[i-1]; |
980 |
newav[2] = av[i]; |
981 |
if ((rv = mg_handle(MG_E_FACE, 5, newav)) != MG_OK) |
982 |
return(rv); |
983 |
newav[3] = newav[2]; |
984 |
newav[4] = newav[1]; |
985 |
} |
986 |
/* do top face */ |
987 |
for (i = 1; i < ac-1; i++) { |
988 |
if (hasnorm) { /* zero normals */ |
989 |
vent[1] = nvn[i-1]; |
990 |
if ((rv = mg_handle(MG_E_VERTEX, 2, vent)) != MG_OK) |
991 |
return(rv); |
992 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK) |
993 |
return(rv); |
994 |
} |
995 |
newav[ac-1-i] = nvn[i-1]; /* reverse */ |
996 |
} |
997 |
if ((rv = mg_handle(MG_E_FACE, ac-1, newav)) != MG_OK) |
998 |
return(rv); |
999 |
/* do bottom face */ |
1000 |
if (hasnorm) |
1001 |
for (i = 1; i < ac-1; i++) { |
1002 |
vent[1] = nvn[i-1]; |
1003 |
vent[3] = av[i]; |
1004 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK) |
1005 |
return(rv); |
1006 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK) |
1007 |
return(rv); |
1008 |
newav[i] = nvn[i-1]; |
1009 |
} |
1010 |
else |
1011 |
for (i = 1; i < ac-1; i++) |
1012 |
newav[i] = av[i]; |
1013 |
newav[i] = NULL; |
1014 |
if ((rv = mg_handle(MG_E_FACE, i, newav)) != MG_OK) |
1015 |
return(rv); |
1016 |
return(MG_OK); |
1017 |
} |
1018 |
|
1019 |
|
1020 |
static int |
1021 |
put_cxy() /* put out current xy chromaticities */ |
1022 |
{ |
1023 |
static char xbuf[24], ybuf[24]; |
1024 |
static char *ccom[4] = {mg_ename[MG_E_CXY], xbuf, ybuf}; |
1025 |
|
1026 |
sprintf(xbuf, "%.4f", c_ccolor->cx); |
1027 |
sprintf(ybuf, "%.4f", c_ccolor->cy); |
1028 |
return(mg_handle(MG_E_CXY, 3, ccom)); |
1029 |
} |
1030 |
|
1031 |
|
1032 |
static int |
1033 |
put_cspec() /* put out current color spectrum */ |
1034 |
{ |
1035 |
char wl[2][6], vbuf[C_CNSS][24]; |
1036 |
char *newav[C_CNSS+4]; |
1037 |
double sf; |
1038 |
register int i; |
1039 |
|
1040 |
if (mg_ehand[MG_E_CSPEC] != c_hcolor) { |
1041 |
sprintf(wl[0], "%d", C_CMINWL); |
1042 |
sprintf(wl[1], "%d", C_CMAXWL); |
1043 |
newav[0] = mg_ename[MG_E_CSPEC]; |
1044 |
newav[1] = wl[0]; |
1045 |
newav[2] = wl[1]; |
1046 |
sf = (double)C_CNSS / c_ccolor->ssum; |
1047 |
for (i = 0; i < C_CNSS; i++) { |
1048 |
sprintf(vbuf[i], "%.4f", sf*c_ccolor->ssamp[i]); |
1049 |
newav[i+3] = vbuf[i]; |
1050 |
} |
1051 |
newav[C_CNSS+3] = NULL; |
1052 |
if ((i = mg_handle(MG_E_CSPEC, C_CNSS+3, newav)) != MG_OK) |
1053 |
return(i); |
1054 |
} |
1055 |
return(MG_OK); |
1056 |
} |
1057 |
|
1058 |
|
1059 |
static int |
1060 |
e_cspec(ac, av) /* handle spectral color */ |
1061 |
int ac; |
1062 |
char **av; |
1063 |
{ |
1064 |
/* convert to xy chromaticity */ |
1065 |
c_ccvt(c_ccolor, C_CSXY); |
1066 |
/* if it's really their handler, use it */ |
1067 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1068 |
return(put_cxy()); |
1069 |
return(MG_OK); |
1070 |
} |
1071 |
|
1072 |
|
1073 |
static int |
1074 |
e_cmix(ac, av) /* handle mixing of colors */ |
1075 |
int ac; |
1076 |
char **av; |
1077 |
{ |
1078 |
/* |
1079 |
* Contorted logic works as follows: |
1080 |
* 1. the colors are already mixed in c_hcolor() support function |
1081 |
* 2. if we would handle a spectral result, make sure it's not |
1082 |
* 3. if c_hcolor() would handle a spectral result, don't bother |
1083 |
* 4. otherwise, make cspec entity and pass it to their handler |
1084 |
* 5. if we have only xy results, handle it as c_spec() would |
1085 |
*/ |
1086 |
if (mg_ehand[MG_E_CSPEC] == e_cspec) |
1087 |
c_ccvt(c_ccolor, C_CSXY); |
1088 |
else if (c_ccolor->flags & C_CDSPEC) |
1089 |
return(put_cspec()); |
1090 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1091 |
return(put_cxy()); |
1092 |
return(MG_OK); |
1093 |
} |
1094 |
|
1095 |
|
1096 |
static int |
1097 |
e_cct(ac, av) /* handle color temperature */ |
1098 |
int ac; |
1099 |
char **av; |
1100 |
{ |
1101 |
/* |
1102 |
* Logic is similar to e_cmix here. Support handler has already |
1103 |
* converted temperature to spectral color. Put it out as such |
1104 |
* if they support it, otherwise convert to xy chromaticity and |
1105 |
* put it out if they handle it. |
1106 |
*/ |
1107 |
if (mg_ehand[MG_E_CSPEC] != e_cspec) |
1108 |
return(put_cspec()); |
1109 |
c_ccvt(c_ccolor, C_CSXY); |
1110 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1111 |
return(put_cxy()); |
1112 |
return(MG_OK); |
1113 |
} |